AREA PROTECTION PANEL

Transcription

1 AREA PROTECTION PANEL Area Protection Panels are designed to monitor multiple points in an electrical system for proper normal source voltages. When a failure of any single area occurs a contact output will be given to the emergency power system. As normal power returns the APP signals the emergency power system to disengage. PRODUCT FEATURES UL 1008 Listed Rated for up to 600 VAC Monitors from 1 to 24 points Available Voltages Single Phase 120/240 VAC, Three Phase 480 VAC Multiple voltages can be monitored in a single panel Form C dry contacts output to emergency power system Three phase units also monitor phase rotation Solid State relays Visible indication of failed circuit is provided directly on the sending relay NEMA 1 Wall Mountable Enclosure, ANSI-61 light gray Key locking handle provided All cabinets feature 100% rated Copper Bus Area Protection Panel

2 AREA PROTECTION PANEL BASE POINTS A B C D E AVAILABLE ACCESSORIES Common Failure indicating light mounted on enclosure door Area Failure indicating lights, one per monitoring point mounted on enclosure door Engraved identification ORDERING name plates for INFORMATION each monitored point Padlock-able handle BULLETIN June 2010 Ordering Information AP BASE 12 = 1 12 Point 24 = Point POINTS 01 = 1 point 02 = 2 points 03 = 3 points 23 = 23 points 24 = 24 points PHASES 1 = Single Phase 3 = Three Phase OPERATING VOLTAGE B = 208 vac C = 480 vac DC VOLTAGE 12 = 12 vdc 24 = 24 vdc Area Protection Panel

3 AUXILIARY CONTACT BEFORE TRANSFER - ACBT ELECTRO-MECHANICAL DESCRIPTION This option provides two (2) sets of Dry Contacts, one (1) set Normally Open and one (1) set Normally Closed, which change state prior to transfer in either direction. The time delay between initiation of these contacts and switch transfer is field adjustable from.03 seconds to 30 minutes. Operation - Single Motor When the transfer switch senses that the preferred power source is out of acceptable limits, a signal is sent by the transfer switch to start the on-site engine generator set. When the output of the engine generator set has attained an acceptable level, the automatic transfer switch energizes relay ECRE and timer ECTE. When ECRE is energized, a set of dry contacts, one normally open and one normally closed, immediately change state. This sends a signal to the elevator controller that a transfer is about to occur. The time delay between the change in state of these contacts and actual transfer of the switch is field adjustable through timer ECTE. Once this timer has timed out, the automatic transfer switch transfers the load from the normal to the emergency power source, and ECRE and ECTE are de-energized allowing the set of dry contacts to revert to their original state. Once the normal source has returned to within acceptable limits and associated time delays have been timed out to prepare for a return of the load to the normal source, relay ECRN and timer ECTN are energized. When ECRN is energized, a set of dry contacts, one normally open and one normally closed, change state signaling the elevator controller that a transfer of the power source is about to occur. When ECTN times out, the automatic transfer switch transfers the load from the emergency source to the normal source. Once the transfer is complete, ECRN and ECTN are de-energized and revert to their original state. Please note that the engine maintain timer, EMT, is necessary for this option to function. Operation - Dual Motor Operation of the Elevator Control, accessory 35, when applied on a Lake Shore Electric Corporation Style 3 transfer switch is similar to that as described above for the Style 2 and T-200. However, instead of transferring to the Normal or Emergency positions after the ECT timers have timed out, the transfer switch transfers to a neutral position, which starts the Time Delay to Transfer (TDT) timer. At this time the ECR relays and the ECT timers are de-energized and revert to their original state. Once the TDT timer has timed out, the transfer switch completes the transfer operation. Auxiliary Contact Before Transfer

4 BP SERIES - AUTOMATIC TRANSFER SWITCH By-Pass Isolation Insulated Case Automatic Transfer Switch Ampere UL 1008 Listed Two and Four Breaker Designs Dependable, Positive Transfer Safe to Transfer Under Load Dead Front Design Requires Rear Access Up To 200 kaic Draw-Out Breakers All cabinets feature 100% rated Copper Bus PRODUCT FEATURES Fully Automatic Transfer Switch Microprocessor Controls NEMA 1 Free Standing Enclosure Draw-out Breakers Source Available & Switch Position Pilot Lights Maintenance Disconnect Switch Override Push button Closed Differential Undervoltage Relay Overcurrent Pilot Light Plant Exerciser, Load Selectable Load Test Cycle Switch Isolate or Service one half of the Transfer Switch without disconnecting the load PRODUCT OPTIONS Enclosure Options: NEMA 12, NEMA 3R, NEMA 4, NEMA 4X, NEMA 3R Stainless Steel Service Entrance Rated Closed Transition Transfer Ground Fault Protection Load Demand Inhibit Peak Shave Contact Remote Disconnect Space Heater Single Phase Protection Surge Suppression Customer Specified Withstand Ratings Over Current Protection BP Series By Pass Isolation Automatic Transfer Switch

5 BP SERIES - AUTOMATIC TRANSFER SWITCH Insulated Case Elements Ampere Style A B C D E Lugs # & MCM Weight Lbs. 800 Draw Out (4) Draw Out (4) Draw Out (8) Draw Out (8) Draw Out (8) Draw Out (12) Draw Out (12) All Enclosures listed above are Free Standing and require rear access. BP Series By Pass Isolation Automatic Transfer Switch

6 BP SERIES - AUTOMATIC TRANSFER SWITCH By-Pass Isolation Available Amps POLES AMPS VOLTAGE-PHASE- WIRE-HERTZ ORDERING INSTRUCTIONS IC D A C P S F CONTROLS WITHSTAND ENCLOSURE FREE STANDING A=120/ M = 12 VDC S = Standard F=NEMA 3R B=120/ P = 24 VDC H = High H=NEMA C=277/ E = Electromechanical V = Very High J=NEMA 4X* 2000 D= L=NEMA 3R* 2500 E=127/ O=Open (no enclosure) 3000 F= X=Special (by description) 4000 G=120/ H=220/ I= J= K= L= * These Enclosures are 304 Stainless Steel BP Series By Pass Isolation Automatic Transfer Switch

7 CLOSE DIFFERENTIAL UNDERVOLTAGE PROTECTION Technical Bulletin CLOSE DIFFERENTIAL UNDERVOLTAGE PROTECTION WITH MORE UL 1008, the standard under which almost all automatic transfer switches in the United States of America are manufactured, states that an automatic transfer switch shall initiate transfer from the normal supply to the alternate supply upon the interruption of any or all phases of the normal supply. Lake Shore Electric Corporation accomplishes this by providing a close differential under voltage sensing relay (Model 26220) on the normal supply as a standard feature in all automatic transfer switches. The design of the Lake Shore Electric Corporation relay offers more than the monitoring of an undervoltage condition. It also provides additional protection of connected motors in the event of voltage unbalance. Lake Shore Electric Corporation recognizes that improper voltage conditions, undervoltage or voltage unbalance, may have several harmful effects, particularly when motor loads are involved. This article will address these issues and will limit the discussion to three phase systems since motor loads are predominantly used in such systems. UNDERVOLTAGE PROTECTION WHY IS IT NECESSARY? An improper voltage condition on a single or three phase power system may have several harmful effects, particularly when motor loads are involved. This article will refer to three phase systems since motor loads are predominantly used in such systems. EFFECTS OF UNDERVOLTAGE During startup, a low voltage condition will produce a lower starting current and starting torque. Although a lower starting current may be desirable, a lower starting torque may not be acceptable. The torque produced by a motor is approximately proportional to the square of the voltage applied, that is, a motor that is started at 90% of rated voltage will produce a torque of (.90)² = 81% of rated torque. This may not be capable of starting the load. If the undervoltage condition occurs while the motor is running, the result is a lower running torque, as described above, and a higher line current. The reason for the increased line current is as follows: a lower line voltage at a given load produces an increased slip. The increased slip produces a higher line current. The reason the starting current is reduced with a lower line voltage is because the slip at starting is unity; it cannot get any worse, therefore the starting current is proportional to the starting voltage. Technical Bulletin - Close Differential Undervoltage Protection

8 CLOSE DIFFERENTIAL UNDERVOLTAGE PROTECTION Technical Bulletin EFFECTS OF VOLTAGE UNBALANCE Another less mentioned and much more harmful condition to motors is voltage unbalance. Voltage unbalance creates a decrease in efficiency, decrease in power factor, large increase in current, large temperature increase and a decrease of insulation life. Voltage unbalance is defined as a percentage equal to 100 times the maximum deviation from the average voltage divided by the average voltage. Therefore, a system with phase voltages of 205, 216, and 208 has an average voltage of and a maximum deviation of 6.3 thus giving it a voltage unbalance of 3%. Unbalanced voltages applied to an induction motor cause unbalanced currents to flow. The increase in temperature in the phase with the greatest current will be approximately two times the square of the percentage of voltage unbalance. The effects of voltage unbalance to increased motor temperature are shown in Figure 1. This increase in temperature, created by the voltage unbalance, creates a decrease in insulation life as shown in Figure 2. PROTECTION Undervoltage and voltage unbalance protection is necessary to prevent the harmful effects as described above. Undervoltage relays are typically of the close-differential type, that is, all three phases of the three phase source must attain a value equal to, or greater than, the pickup setting of the undervoltage relay before its contacts change state. This value is typically set at 90% of nominal voltage Technical Bulletin - Close Differential Undervoltage Protection

9 CLOSE DIFFERENTIAL UNDERVOLTAGE PROTECTION Technical Bulletin since the utility supply can stabilize at anywhere from ± 10% of nominal voltage. Once energized, the relay will not de-energize until any one of the three phases falls below the dropout setting of the undervoltage relay. This value is typically set at 80% of nominal voltage, however, this is where undervoltage relays differ. Many undervoltage relays strictly sense line to line voltage, while a Lake Shore Electric Corporation undervoltage relay generates an internal neutral allowing it to sense a line to neutral voltage even in a three phase, three wire system. This is important for detecting a voltage unbalance condition. Consider Figure 3. Triangle ABC represents a balanced voltage source. Triangle ABD represents a three phase system in which one phase has dropped to 80% of its nominal voltage, giving this system a 6.1% unbalance. A line to line sending undervoltage relay set at 90% pickup and 80% dropout would monitor the following voltages: AB = 100%; BD = 90%; DA = 90% Since all three phases are equal to or greater than 90%, this relay would energize indicating a proper voltage condition. Now consider a Lake Shore Electric Corporation relay set at 90% pickup and 80% dropout. Since it generates its own neutral, it would monitor the following voltages: NA = 100%; NB = 100%; ND = 80% Since all three phases are not equal to or greater than 90%, this relay would not energize indicating an improper voltage condition. If all three phases are reduced in a balanced manner, both types of relays will behave identically. The dropout point of a Lake Shore Electric Corporation three phase voltage sensing relay can be set to protect a system for a given voltage unbalance as shown in Figure 4 and thereby protect the motors connected to this load from the severe overheating associated with a this voltage unbalance as shown in Figure 5. A line to line type of voltage sensing relay (also shown in Figure 4) cannot accomplish this because the dropout point would have to be set so high it would cause nuisance undervoltage indications. Technical Bulletin - Close Differential Undervoltage Protection

10 CLOSE DIFFERENTIAL UNDERVOLTAGE PROTECTION Technical Bulletin The vertical line in Figures 4 and 5 indicates the protection undervoltage relays provide against voltage unbalance when it is calibrated for an 87% dropout. The Lake Shore Electric Corporation Voltage Sensing Relay will dropout on a 4% voltage unbalance, thus limiting the motor overheating to 32% above normal. A line to line type voltage sensing relay with the same dropout point will not dropout until the system has an 8.5% voltage unbalance, thus allowing a 140% above normal temperature rise on any motors connected to this system. The Lake Shore Electric Corporation undervoltage relay is also equipped with an inverse time delay on both pickup and dropout as shown in Figure 6. This time delay helps avoid nuisance undervoltage indications as may occur during system transients. The inverse time characteristic allows a 1.5 second delay before the relay de-energizes when any phase falls just below the dropout setting. A.4 second delay occurs when any phase falls well below the dropout setting (20% or more). Technical Bulletin - Close Differential Undervoltage Protection

11 CLOSE DIFFERENTIAL UNDERVOLTAGE RELAY - PFR DESCRIPTION The Lake Shore Electric Close Differential Undervoltage relay continuously monitors the voltage of a three phase power source and provides dependable response to protect generators, transformers and motors from damage due to a continual undervoltage condition. When the voltage in each phase attains a value equal to or greater than the pickup setting, the output contacts change state and an LED is energized. Pickup is easily field adjustable on all three phases by means of a single potentiometer accessible with a screwdriver from the front of the relay. The range of adjustment is 70% to 100% of nominal voltage. When the voltage of any phase fails below the dropout setting, the output contacts revert to their de-energized state and the LED is de-energized. Dropout is easily field adjustable on all three phases by means of a single potentiometer accessible with a screwdriver from the front of the relay. Adjustable range is 70% - 100% of nominal voltage. FEATURES For ease of installation, the Lake Shore three phase Undervoltage Relay is back panel mounted using four screws. The Lake Shore Undervoltage Relay provides true three phase sensing. Where most Undervoltage Relays are designed to measure the average voltage of all three phases and operate on this average voltage, the Lake Shore Undervoltage Relay measures each phase separately. It will not pickup until all three phases attain the value selected by the potentiometer setting. Correspondingly, the Relay will dropout as soon as any of the three phases show a drop in voltage below the value selected by the potentiometer setting. Lake Shore Electric Corporation believes that a voltage relay that does not provide discrete monitoring of all three phases should never be relied upon in critical applications. APPLICATION Electrical loads are designed to operate under relatively constant voltage conditions. Undervoltage conditions from the supply source can cause corresponding overcurrent and increased temperature conditions which could have potentially damaging effects to connected equipment. Protective undervoltage relays which monitor supply voltage can provide an output signal when voltage drops below predetermined levels. They can be employed in a wide variety of applications which include motor protection, transformer protection, generator protection, supervision of automatic transfer systems, power generation systems, and area protection monitoring systems. Close Differential Undervoltage Relay - PFR

12 CLOSE DIFFERENTIAL UNDERVOLTAGE RELAY - PFR COMPLETE PART NUMBER ASSEMBLED Example 70LSEUV B 70LSEUV (plus one letter for your input voltage) B C E F I J = 208 vac = 480 vac = 220 vac = 240 vac = 380 vac = 440 vac SPECIFICATIONS INPUT VOLTAGE ACCURACY TRANSIENT FREQUENCY POWER CONSUMPTION TEMPERATURE CONTACT TYPE RATING WEIGHT HIGH POT CONSTRUCTION VISUAL SETTING APPROVED BY Model 70LSEUV , 3 phase, from 208 to 480 VAC. Input voltage is factory set and marked on nameplate. ± 2% of nominal over operating temp. range 110% of nominal continuously 150% of nominal 10 seconds 200% of nominal 1 second 50/60 Hertz 40/70 Hertz ± 1% of normal 3 VA maximum Operating 20 C to +60 C Storage 40 C to +80 C One form C dry contact 5 120VAC or 28VDC resistive 30 ounces Mini. of 2X nominal voltage + 1,000 volts Solid state sensor with relay output housed in a steel enclosure ±5% of nominal voltage U.L. Industrial Control Equipment Close Differential Undervoltage Relay - PFR

13 CLOSED TRANSITION TRANSFER ASSY - CTT DESCRIPTION Closed Transition Transfer allows the automatic transfer switch to transfer between sources without interruption of power to the load. This is accomplished by synchronizing the two sources prior to transfer and performing a make before break transfer. Upon closure of the oncoming source the source from which power is being transferred is disconnected; the actual time the sources are paralleled is typically less than 100 milliseconds. The closed transition or make before break transfer is possible only if both power sources are available and synchronized. If either of the sources are not available, the transfer switch reverts to an open transition or break before make transfer arrangement. Closed Transition Transfer is available on Dual Motor Operator and Insulated Case automatic transfer switches. OPERATION Closed Transition Transfer monitors and compares the frequency and phase angle of the power sources. When the alternate source s frequency and phase angle are within preset limits of the normal source, the sources will be paralleled and the alternate source will be disconnected within acceptable time limits. Again, the average time that the two sources are paralleled is under 100 milliseconds. When offering closed transition transfer as an automatic transfer switch accessory, we feel that additional protective features should be added to ensure safety to the operator and equipment. Without exception, we provide all closed transition transfer switches with Reverse Power Relays on both sources. In addition, we provide an internal timer, which will trip the emergency source if both sources are paralleled for more than an acceptable time. As further redundant protection we will cross trip the normal switch if the emergency switch fails to properly open. In addition to these protections, we include a Synchronize Fail Timer (SFT) that is factory set at 15 minutes. This timer is initiated once the closed transition is called for and will be reset upon completion of the transfer. If, however, for any reason the two sources are unable to slip into synchronization and the timer times out, the HMI will display SFT timed out and the trouble relay will change states. The transfer switch will remain in the Automatic mode and not be placed in a fault position even though the message will remain on the HMI until reset. This additional safety will help prevent total consumption of emergency fuel should synchronization not be achieved. FEATURES Closed Transition Automatic Transfer Switches are provided with the following features regardless of the selected transfer mode: Electrically Interlocked Millisecond timers to ensure paralleling time is minimal Cross Tripping devices as backup to normal transfer means Reverse Power Relays for both sources to prevent back feeding Synchronizing relay Fail to Synchronize Timer Where applications require extended paralleling operation, soft loading/unloading, utility peak shaving or distributed generation, Lake Shore Automatic Transfer Switches and Switchgear can be tailored to meet these needs. Please consult your Lake Shore representative or the factory Sales Department for further information. As in all applications which involve parallel operation with a utility grid, it is advised that the specific utility be consulted for prior approval on this type of application. Each utility has its own requirements and guidelines to be followed, such as additional protective relays. Please contact the Lake Shore Electric factory for products to meet such additional needs. Closed Transition Transfer Accessory

14 DC SERIES - DIRECT CURRENT TRANSFER SWITCH Direct Current Transfer Switch Ampere UL 1008 Listed Automatic or Manual Dependable, Positive Transfer Safe to Transfer Under Load Single and Dual Motor Designs Wall Mount or Free Standing Front Accessible PRODUCT FEATURES 125 Volts DC Electro-mechanical Controller Completely Customizable to your Application Time Delays Source Available & Switch Position Pilot Lights Load Test Switch Programable Plant Exerciser PRODUCT OPTIONS Enclosure Options: NEMA 1, NEMA 12, NEMA 3R Stainless Steel, Steel Space Heater Electrical Assist DC Voltage Transfer Switch

15 DC SERIES - DIRECT CURRENT TRANSFER SWITCH Ampere Style A B C D E Lugs MCM Weight Lbs. 100 Wall Mount (1) #4-4/ Free Standing na na (1) #4-4/ Wall Mount (1) 3/ Free Standing (1) 3/ Wall Mount (1) 2/0-500* Free Standing (1) 2/0-500* Wall Mount (2) Free Standing (2) Wall Mount (3) Free Standing (3) Wall Mount (3) Free Standing (3) Wall Mount (3) Free Standing (3) *This Lug is also capable of accommodating (2) 2/0-250 MCM cables. DC Voltage Transfer Switch

16 DC SERIES - DIRECT CURRENT TRANSFER SWITCH ORDERING INSTRUCTIONS MC D M X E S C POLES AMPS CONTROLS ENCLOSURE A= Automatic E = Electromechanical A=NEMA 1 Wall Mount M=Manual B=NEMA 1 Free Standing C=NEMA 12 Wall Mount 0600 D=NEMA 12 Free Standing 0800 E=NEMA 3R Wall Mount 1000 F=NEMA 3R Free Standing 1200 K=NEMA 3R Wall Mount* L=NEMA 3R Free Standing* O=Open (no enclosure) X=Special (by description) * These Enclosures are 304 Stainless Steel DC Voltage Transfer Switch

17 Draw-out & By-Pass Isolation Technical Bulletin Automatic Transfer Switches utilizing Draw-out switching elements. Accomplishing safe and completely serviceable bypass and isolation. Reliability, dependability and maintainability of all electrical equipment are necessary and mandatory goals of all equipment manufacturers. This goal is one shared with the design professionals. Certainly, in transfer equipment, this goal is a critical requirement. While automatic transfer equipment has been subjected to severe testing which is representative of the use that it may incur in the field, there still remains the necessity of maintaining or servicing the equipment. To be able to maintain and service transfer equipment without discontinuing service to the load is highly desirable. Although this may be a desirable feature, no transfer equipment can be completely maintained or serviced without disturbance to the load. It seems that whatever system of bypass or isolation is provided, there are always instances when disconnection of the load is necessary for total service. In order to provide a means to service and maintain transfer switches, most transfer switch manufacturers have adopted a standard bypass and isolation configuration. This configuration as shown below in Figure A allows qualified personnel to bypass and then isolate the transfer switch for servicing needs. The bypassing function is accomplished either with or without interruption to the load. This standard configuration of transfer switches with bypass and isolation is a classic example of creating a solution while simultaneously creating a problem. By adding bypass contacts and isolating fingers to a normal transfer switch, the user is able to bypass and then isolate the transfer switch for the regular, recommended and required maintenance and servicing of the transfer switch contacts without disconnection of the load. Unfortunately, the added bypass contacts are now continuously energized and they cannot be regularly maintained or serviced without complete disconnection of the power sources and the load. Figure A. (right) shows a typical transfer switch with bypass isolation configuration. Please note that the bypass contacts are always hot. To avoid this dilemma, the Lake Shore Electric Corporation IC transfer switch, when purchased in a draw-out configuration offers the ability to bypass and isolate individual portions of the transfer switch so that servicing and maintenance can be performed on all load break contacts without disconnecting the load. The reason that Lake Shore can accomplish this function in such a straightforward manner is that we provide separate physical paths from each source to the load. The result of this arrangement is that we can separate the contacts of the switch in such a way that one half of the switch can be serving the load while the other half is being serviced. RED lines indicate live parts that are either normally energized or could become energized regardless of isolation status. Bypass contacts are always HOT and un-maintainable. Draw-out & By-pass Isolation Technical Bulletin

18 Draw-out & By-Pass Isolation Technical Bulletin This product is manufactured from the same high quality Insulated Case, Power Circuit breakers that have been used throughout the industry. These UL listed circuit breakers have been the basic building block of switchgear products in this country. They provide stored energy operation, self-aligning line and load side contacts, shutters, secondary contacts as well as Connected, Test and Disconnected positions. When used in transfer equipment, the withdraw-ability of each individual source element allows for isolation of that source without preventing the alternative source from being connected to the load. With this unique feature, the transfer switch itself becomes its own bypassing method. Figure B. (below) shows the Lake Shore Draw Out arrangement. Notice that the contacts are always isolatable. RED lines indicate live parts that Traditional transfer switches do not allow for this isolation of a single source are either normally energized or could become energized regardless of isolation status. add external devices to the trans- while maintaining continuity with the alternate supply source. They must fer switch in order to accomplish the There are no un-maintainable, bypass function. The unfortunate always HOT bypass contacts. outcome of this solution is that the additional load break bypass contacts that are added to the equipment cannot Transfer switch contacts now be maintained at all. The only way to maintain or service the bypass contacts isolated for service. is to completely de-energize the entire system for an extended period of time. After a user has paid almost twice the price of a standard transfer switch by adding the bypass isolation feature we do not think he should be shocked into the realization that he must undergo an extended shutdown so that the bypass contacts can be serviced and maintained. Such shutdowns are not typically acceptable. With the Lake Shore Electric Corporation draw-out insulated case automatic transfer switch, reliability, serviceability and maintainability are preserved. A single spare element, when ordered, can be used as a replacement for either source thus increasing reliability and rapid restoration of normal service. There are no multiple handles that must be operated in sequential order. Operation is simple and straightforward. The qualified maintenance personnel will instantly recognize the equipment since it is identical to existing installed power switchgear. The racking out of the elements to the test and then disconnected positions is common practice to the experienced maintenance person. The replacing of an element is the same as in any switchgear lineup. The weight and mass of a single element is less than half that of a traditional transfer switch. This allows the maintenance personnel ease of service and personnel safety. All necessary switching parts are nationally available from Lake Shore Electric Corporation or the manufacturer of the power circuit breakers. No unnecessary waiting for replacement switching components. The construction of the Lake Shore Electric Corporation IC draw-out automatic Transfer Switch is identical to the construction of a typical double-ended switchboard. The loads are served by two sources. Being withdrawn for service and replacement can isolate power circuit breakers for each source. Transfer to the alternate source will bypass the out of service source. Double-ended switchboards are not equipped with redundant, non-serviceable bypass-isolation switches. Likewise, a Lake Shore Electric draw-out transfer switch provides a simple, straightforward and serviceable method of accomplishing bypass and isolation operation without the addition of redundant, non-serviceable bypass contacts. Draw-out & By-pass Isolation Technical Bulletin

19 DUAL PRIME SOURCE ACCESSORY - DPS Lake Shore Electric Corporation offers a Dual Prime Source option that allows the designation of one of two power sources as a Preferred Source for the Automatic Transfer Switch operation. The power sources can be two generators, two utilities or a generator and utility. As in a conventional transfer switch, the Dual Prime Source Transfer Switch is designed to transfer a load between two power sources with one power source being designates as the Preferred Source while the other is designated as the Alternate Source. In the Manual system, selection of the Preferred Source is accomplished by a door mounted selector switch provided. In the Automatic system, a time clock alternates which power source is the Preferred Source at a set time or multiple times during a seven day period. If a failure of the Preferred Source occurs, the transfer switch will start the Alternate Source and transfer the load to it. When the faulted Preferred Source is returned to service, the transfer switch will then retransfer the load back to the Preferred Source power. GENERATOR TO GENERATOR The Dual Prime Source accessory for a Generator to Generator system provides: Accessory PFR TDC EMT PSS PL PE Description 1 or 3 phase close differential undervoltage sensing on both sources Time Delay Control timer for both sources to allow engine to attain speed Engine Maintain Timer for both sources to allow engine cool down Preferred Source Selector switch to choose the preferred (Normal) source Pilot Lights to indicate the source to which the load is connected A fourteen day time clock which will automatically alternate the generator set selected as the Preferred Source at a chosen interval to ensure even running time on both engine generator sets. (Automatic only) UTILITY TO UTILITY The Dual Prime Source accessory for a Utility to Utility system provides: Accessory PFR TDC ODT PSS PL PE Description 1 or 3 phase close differential undervoltage sensing on both sources Time Delay Control timer for both sources Outage Delay Timer for both sources Preferred Source Selector switch to choose the preferred (Normal) source Pilot Lights to indicate the source to which the load is connected A fourteen day time clock which will automatically alternate the generator set selected as the Preferred Source at a chosen interval to ensure even running time on both sources. (Automatic only) Dual Prime Source Accessory

20 DUAL PRIME SOURCE ACCESSORY - DPS TYPICAL APPLICATION OF DUAL PRIME SOURCE ACCESSORY FOR REDUNDANT ON-SITE POWER SYSTEMS In many critical applications it is imperative that the standby power system operate without fail. As a result, specifying engineers may require two on-site power generation plants to insure that an alternate power source will be available. In this scenario the Lake Shore Electric Dual Prime Source option is ideally suited. In the figure below ATS-1 is a standard Utility to Emergency automatic transfer switch. ATS-2 is a Dual Prime Source automatic transfer switch. Upon a Utility power outage, ATS-1 will signal ATS-2 to start the Preferred Source generator. ATS-2 will start the generator and provide power to ATS-1 which will transfer the load to the generator. If a failure occurs on the Preferred Source generator, the Alternate Source generator will be started by ATS-2. ATS-2 will then transfer to the Alternate Source generator and continue to supply power to the load through ATS-1. When Utility power returns, ATS-1 will return to the utility position and the load transferred to the utility. ATS-2 will then stop the running generator after the Engine Maintain Timer has timed out. Dual Prime Source Accessory

21 ELECTRO-MECHANICAL NOMENCLATURE SYM DESCRIPTION SYM DESCRIPTION ACBE ACBN ACCE ACCN ACR ACRE ACRN BAE BAN BC CR DWL EB1 EC ECB ECR ECT EL EMT EPL ER ES FR FVR K LA LCT LNL LTS MOR MDS MPL MRTN MSE MSN NB1 NC AUX. CONTACT IN BREAKER EMERGENCY AUX. CONTACT IN BREAKER NORMAL AUX. CONTACT IN CONTACTOR EMERGENCY AUX. CONTACT IN CONTACTOR NORMAL AUXILIARY CONTACT RELAY AUXILIARY CONTACT RELAY EMERGENCY AUXILIARY CONTACT RELAY NORMAL BELL ALARM EMERGENCY BELL ALARM NORMAL BATTERY CHARGER CONTROL RELAY DERANGEMENT WARNING LIGHT EMERGENCY MOTOR BREAKER ELEVATOR CONTROL EMERGENCY CIRCUIT BREAKER EMERGENCY CONTACTOR RELAY EMERGENCY CONTROL TRANSFORMER EMERGENCY LATCH ENGINE MAINTAIN TIMER EMERGENCY POWER ON LIGHT EMERGENCY CONTROL RELAY EMERGENCY SWITCH FREQUENCY RELAY FREQUENCY VOLTAGE RELAY CONTROL RELAY LIGHTNING ARRESTOR LOAD CONTROL TRANSFORMER LOAD/NO LOAD TRANSFORMER LOAD TEST SWITCH MOTOR DISCONNECT RELAY MAINTENANCE DISCONNECT SWITCH MECHANICAL PADLOCK MANUAL RETURN TO NORMAL MICRO SWITCH EMERGENCY MICRO SWITCH NORMAL NORMAL MOTOR BREAKER NORMAL CONTACTOR NCB NCR NCT NE NL NPL NS ODR1 ODR2 ORPB PE PE/NL PE/SL PE/TL PEBR PEBT PFR PFR/O* PFRE PFRE/O* PFRN PFRN/O* PL PT R RCS SS ST TDE TDR TDT TH TM TME TMN TR NORMAL CIRCUIT BREAKER NORMAL CONTACTOR RELAY NORMAL CONTROL TRANSFORMER NEUTRAL LUG NEUTRAL LATCH NORMAL POWER ON LIGHT NORMAL SWITCH OUTAGE DELAY RELAY TIMER OUTAGE DELAY RELAY OVERRIDE PUSHBUTTON PLANT EXERCISER PLANT EXERCISER NO LOAD PLANT EXERCISER SWITCHABLE LOAD PLANT EXERCISER TRANSFER LOAD PLANT EXERCISER BYPASS RELAY PLANT EXERCISER BYPASS TIMER PHASE FAILURE RELAY PHASE FAILURE RELAY PHASE FAILURE RELAY EMERGENCY PHASE FAILURE RELAY EMERMERGENCY PHASE FAILURE RELAY NORMAL PHASE FAILURE RELAY NORMAL PILOT LIGHTS POTENTIAL TRANSFORMER RETURN RELAY REAR CONNECTED STUDS SELECTOR SWITCH SHUNT TRIP TIME DELAY TO EMERGENCY TIME DELAY TO RETURN TIME DELAY TO TRANSFER THERMOSTAT TRANSFER MOTOR TRANSFER MOTOR EMERGENCY TRANSFER MOTOR NORMAL TRANSFER RELAY *O = OVERVOLTAGE Electro-Mechanical Nomenclature

22 EM SERIES - AUTOMATIC TRANSFER SWITCH Electromechanical Automatic Transfer Switch Ampere UL 1008 Listed Dependable Transfer Safe to Transfer Under Load Wall Mount or Free Standing Withstand Ratings up to 200kAIC PRODUCT FEATURES Fully Automatic Transfer Switch Electromechanical Controls Completely Customizable for Your Application Time Delay to Return Start Contacts Source Available & Switch Position Pilot Lights Load Test Switch Closed Differential Undervoltage Relay Pilot Lights Plant Exerciser, Load Selectable All cabinets feature 100% rated Copper Bus PRODUCT OPTIONS Enclosure Options: NEMA 1, NEMA 12, NEMA 3R, NEMA 4, NEMA 4X, NEMA 3R (304) Stainless Steel Closed Transition Transfer Ground Fault Protection Dual Prime Source Elevator Controls Space Heater Surge Suppression Pilot Lights Service Entrance Special Lugs Fire Pump Controls Selector Switch Electromechanical Automatic Transfer Switch

23 EM SERIES - AUTOMATIC TRANSFER SWITCH Molded Case Elements Ampere Style A B C D E Lugs MCM Weight Lbs. 100 Wall Mount (1) #4-4/ Free Standing na na (1) #4-4/ Wall Mount (1) 3/ Free Standing (1) 3/ Wall Mount (1) 2/0-500* Free Standing (1) 2/0-500* Wall Mount (2) Free Standing (2) Wall Mount (3) Free Standing (3) Wall Mount (3) Free Standing (3) Wall Mount (3) Free Standing (3) *This Lug is also capable of accommodating (2) 2/0-250 MCM cables. Electromechanical Automatic Transfer Switch

24 EM SERIES - AUTOMATIC TRANSFER SWITCH Insulated Case Elements Ampere Style A B C D E Lugs # & MCM Weight Lbs. 800 Fixed (4) Draw Out (4) Fixed (4) Draw Out (4) Fixed (8) Draw Out (8) Fixed (8) Draw Out (8) Fixed (8) Draw Out (8) Fixed (12) Draw Out (12) Fixed (12) Draw Out (12) All Enclosures listed above are Free Standing and require rear access. Electromechanical Automatic Transfer Switch

25 EM SERIES - AUTOMATIC TRANSFER SWITCH ORDERING INSTRUCTIONS MC D A C E S E POLES AMPS VOLTAGE-PHASE-WIRE-HERTZ WITHSTAND ENCLOSURE A=120/ S = Standard A=NEMA 1 Wall Mount B=120/ H = High B=NEMA 1 Free Standing C=277/ V = Very High C=NEMA 12 Wall Mount 0600 D= D=NEMA 12 Free Standing 0800 E=127/ E=NEMA 3R Wall Mount 1000 F= F=NEMA 3R Free Standing 1200 G=120/ G=NEMA 4 Wall Mount H=220/ I= J= K= L= H=NEMA 4 Free Standing I=NEMA 4X Wall Mount* J=NEMA 4X Free Standing* K=NEMA 3R Wall Mount* L=NEMA 3R Free Standing* O=Open (no enclosure) X=Special (by description) * These Enclosures are 304 Stainless Steel ORDERING INSTRUCTIONS IC F A C E S F POLES AMPS VOLTAGE-PHASE-WIRE-HERTZ WITHSTAND ENCLOSURE Fixed A=120/ S = Standard F=NEMA 3R Free Standing Draw Out B=120/ H = High H=NEMA 4 Free Standing 1600 C=277/ V = Very High J=NEMA 4X Free Standing* 2000 D= L=NEMA 3R Free Standing* 2500 E=127/ O=Open (no enclosure) 3000 F= X=Special (by description) 4000 G=120/ H=220/ I= J= K= L= * These Enclosures are 304 Stainless Steel Electromechanical Automatic Transfer Switch

26 ELECTRO-MECHANICAL CONTROLS STANDARD AUTOMATIC TRANSFER SWITCH FEATURES P8 TDR Time Delay Return 5 TDT Time Delay to Transfer ** 8 PFRN Phase Failure Relay Normal 17 SC Engine Start Contacts 34A LTS Load Test Switch, Maintained ** Dual Motor & Insulated Case Automatic Transfer Switch POSITIVE CONTROL SYSTEM CONFIGURATIONS The following configurations are available for ease of ordering the most common timer groups utilized on transfer switches. P1 P2 P3 P4 P5 P6 P7 P8 TDR, ODR, TDE, EMT TDR, ODR, EMT TDR, ODR, TDE TDR, TDE, EMT TDR, ODR TDR, TDE TDR, EMT TDR 1. TDR - Time Delay to Return - Provides a delay after the return of Normal power before retransferring the load from the Emergency source. This feature allows Normal voltage to stabilize and ensures against the premature return when the Normal power grid is potentially unbalanced. Provided in a five-range model sec., sec., sec., 3.5 sec.-3 min., and 35 sec.-30 min., the timing ranges are field adjustable. This time delay is standard on all electromechanical automatic transfer switches. 2. TDE - Time Delay to Emergency - Provides a delay after the engine has started before transferring the load to the Emergency source. This feature allows voltage to stabilize at the Emergency source to protect against initial wide fluctuations and can provide a brief warm-up period before loading the engine. Provided in a five-range model sec., sec., sec., 3.5 sec.-3 min., 35 sec.-30 min., the timing ranges are field adjustable. 3. ODR - Outage Delay Relay - Provides an adjustable delay after failure of the Normal source before initiating an Engine-Start signal to allow for temporary short-duration fluctuations in voltage. This feature prevents unnecessary starting of the engine, and is usually supplied with an adjustable range of 1 to 300 seconds although other delay times are available. 4. EMT - Engine Maintained Timer - Provides a time delay after retransferring the load to the Normal source before shutting down the engine. This feature allows the engine to run under noload conditions for cooling before shut-down to prevent against thermal and mechanical shocks. Provided in a five-range model sec., sec., sec., 3.5 sec.-3 min., 35 sec.-30 min., the timing ranges are field adjustable. 5. TDT - Time Delay to Transfer - (for Dual Motor & Insulated Case Transfer Switches ) - Provides a time delay between opening the contacts on one source and closing the contacts on the other source. This feature is recommended where there are high inductive loads, since with both sources open the residual field currents are allowed to decay to acceptable limits preventing electrical and mechanical overloads. This time delay functions in both directions (Normal to Emergency and Emergency to Normal) provided in a five-range model sec., sec., sec., 3.5 sec.-3 min., 35 sec.-30 min., the timing ranges are field adjustable. Electro-Mechanical Controls

27 ELECTRO-MECHANICAL CONTROLS 6. PE - Plant Exerciser / Switchable Load - Provides for regular automatic exercising of the Emergency Power System on a pre-selected schedule. The basic timer provides for a flexible period (in 15-minute increments) of exercise, and the periods can be scheduled for any specific day (or days) within a 7-day cycle. In the event of engine-generator failure, when operating in the plant exerciser mode, the Automatic Transfer Switch will immediately return to the Normal source, if available. A selector switch is included allowing exercising under either load or noload conditions. 7. FPC - Fire Pump Control - Provides necessary features required by NFPA 20 for the automatic transfer switch to be used with centrifugal fire pump controllers. For Dual Motor and Insulated Case Transfer Switches only. Two configurations are available: 7A. Utility to Generator 7B. Utility to Utility 8. PFRN - Phase Failure Relay Normal - Provides for close differential monitoring of the Normal Source voltage to ensure that it is within acceptable limits. The factory setting for the PFRN is 90% Pickup and 80% Dropout of the nominal voltage. The 3 phase units can be adjusted to guard against long term reduced voltage conditions ( brownouts ) to as close a differential as 2% (i.e. 89% Pickup and 87% Dropout). This relay is standard on all automatic transfer switches. 8A. Single Phase 8B. Three Phase 9. PFRN/O - Phase Failure Relay Normal/ Overvoltage Provides for closedifferential monitoring of the Normal source to ensure that it is within acceptable limits with respect to overvoltage. The usual setting for the PFRN/O is 115% Pickup and 110% Dropout. This relay can also be adjusted to as close a differential as 2% (i.e. 116% Pickup and 114% Dropout), and is available as follows: 9A. Single Phase 9B. Three Phase 10. PFRE - Phase Failure Relay Emergency This relay provides protection against transferring the load to the Emergency source until voltage has reached acceptable limits. In the event the relay drops out when Normal power is available, the TDR will be bypassed and retransfer to Normal will be initiated immediately. This relay is available as follows: 10A. Single Phase 10B. Three Phase 11. PFRE/O - Phase Failure Relay Emergency/Overvoltage similar to the PFRN/O above but for use on the Emergency source. The same bypassing action is provided as with the PFRE (10). This relay is available as follows: 11A. Single Phase 11B. Three Phase 12. FR - Frequency Relay (singlephase) Provides Protection against transferring to the Emergency Source until the generator has reached operating frequency. 13. FVR - Frequency/Voltage Relay (singlephase) Provides protection against transferring to the Emergency Source until the generator has reached both operating frequency and voltage. 14. SS - Selector Switch Provides selection of four modes of operation of the Transfer Switch : Automatic The transfer switch is in the fully Automatic mode. Manual Provides engine start signal only. The transfer switch will not operate and the load will not be transferred. Test Provides engine start signal plus transfer of the load to Emergency source. Electro-Mechanical Controls

28 ELECTRO-MECHANICAL CONTROLS Off Disables the control logic, ensuring that the transfer switch will remain in the same position regardless of Normal or Emergency source conditions. 14A. SS Selector Switch only 14B. SSWL Selector Switch plus 12VDC light to indicate transfer switch not in automatic. 14C. SS-WL Selector Switch plus 24VDC light to indicate transfer not in automatic. 15. MRTN - Manual Return to Normal Push Button Provides immediate return to the Normal source when Normal voltage is present, by Manual operation only (TDR is not present). Dual Motor application allows for time delay (TDT) between Emergency source Open and Normal source Closed. Transfer to Normal will automatically take place when there is loss of Emergency source and the Normal source is present 16. ORPB - Override Push Button Provides for immediate return to Normal position by manual operation when Normal source voltage is present bypassing the TDR timer. Dual Motor application allows for time delay (TDT) between Emergency source Open and Normal source Closed. 17. SC - Starting Contact Provides dry (no voltage) contact for starting an engine when initiated by the transfer switch. This is standard on all automatic transfer switches. 18. ACRN - Auxiliary Contacts Relay (Energized from Normal source) Provides for two auxiliary Form C (Common + Normally Open + Normally Closed) 10 ampere contacts on the normal source. 19. ACRE - Auxiliary Contacts Relay (Energized from Emergency source) Provides for two auxiliary Form C (Common + Normally Open + Normally Closed) 10ampere contacts on the emergency source. 20. OPTION NO LONGER AVAILABLE 21. OPTION NO LONGER AVAILABLE 22. PL - Pilot Lights Provides two LED indicating lights mounted on the exterior of the transfer switch enclosure, showing the position of the switch or the available sources. Pilot Lights may also be mounted at any remote location. 22A. Switch Position (GREEN = Normal, RED = Emergency) 22B. Source Available 23. CBT - Circuit Breaker Trips Provides overcurrent protection within the transfer switch. This feature may eliminate the requirement to install separate overcurrent protective devices on either the Normal or Emergency source (or both sources). Trips will be of the following configurations and will be installed on the Normal or Emergency side molded case switch: ThermalMagnetic - Providing both overload and short circuit protection, the thermalmagnetic type will not trip under momentary overloads, but will trip instantly on heavy short circuit currents (against a definite current/time curve). Magnetic Only - Providing short circuit protection only, the magnetic only type will trip instantly (within one cycle, or approximately seconds) when current reaches the selected setting. 23A. Normal Source - provides trip on Normal source molded case switch or circuit breaker. 23B. Emergency Source - provides trip on Emergency source molded case switch or circuit breaker. 24. SCPD Special Circuit Protection Devices Provides for the many special additions that can be added to the transfer switch. Consult Sales Representative for details and availability. Electro-Mechanical Controls

29 ELECTRO-MECHANICAL CONTROLS 28. SL - Special Lugs Provides for connection of both sources and the load (as well as the neutral when specified) to the Transfer Switch. Shall be furnished as supplied by the manufacturer of the molded case switch. Standard lugs are supplied on all Lake Shore Transfer Switches. Special lug arrangements must be specified when order is placed. 29. MD - Maintenance Disconnect Disconnects control circuitry from line for maintenance purposes. 30. ST - Shunt Trips Electrically trips switches from a remote location (not a protective type trip). 31. SE - Service Entrance Provides for transfer switch (Dual Motor & Insulated Case only) to be approved for service entrance. Includes thermalmagnetic overcurrent trip on Service Source switch, selector switch, neutral bus bar, lugs, bonding jumper and strap, and special nameplate. 33. DPS Dual Prime Source Provides for selection between two generators or two utilities. For Dual Prime Power consult factory for details. 33A. Manual, Generator to Generator 33B. Automatic, Generator to Generator 33C. Manual, Utility to Utility 33D. Automatic, Utility to Utility 34. LTS - Load Test Switch Provides engine starting plus transfer of the load to the Emergency source without having to fail the Normal Source. 34A. Mounted inside the enclosure, maintained switch. This switch is standard on all electro-mechani cal automatic transfer switches. 34C. Mounted inside the enclosure, momentary pushbutton. 35. EC - Elevator Control This option provides 2 sets of dry (no voltage) contacts, 1 set N.O. and 1 set N.C., which change state prior to transfer in either direction. Time delay between initiation of these contacts and switch transfer is field adjustable.03 seconds to 30 minutes. 36. CTT - Closed Transition Transfer Provides transfer of power from one source to another without interruption of power to the load. Applicable to Dual Motor and Insulated Case switches only. 37. IPM - In Phase Monitor - Monitors Normal and Emergency source for proper synchronization prior to transfer when both sources are available and is disabled if either source fails. Functions in both directions - Normal to Emergency and Emergency to Normal. Available on Single Motor Transfer Switches only. 38. SSP - Surge Suppressor - Provides for protection of transfer switch from voltage surges which may damage control circuitry. Protection includes surge suppressors on both power sources and MOV s on the control circuitry. 39. GFP - Ground Fault Protection - When a ground fault is detected, the Normal and Emergency source will be opened isolating the ground fault from external voltage sources. 39A. Ground Fault Protection 39B. Ground Fault Indication (provides indication only with no isolating action.) 43. TSO - Test switch Override - Overrides the operation of a remote or local test switch that has been used to force the ATS to the Emergency position. If the Emergency power fails the ATS will automatically retransfer to the Normal position if normal power is available. 44. HTR - Strip Heater watt strip heater with thermostat to help eliminate moisture build-up in the enclosure. Provided as a standard with all Outdoor Enclosures. Electro-Mechanical Controls

30 FC SERIES - AUTOMATIC TRANSFER SWITCH Fire Commander Fire Pump ATS Molded Case Automatic Transfer Switch Ampere NFPA 20 Rated UL 1008 Listed NEMA ICS Compliant Dependable, Positive Transfer Safe to Transfer Under Load Free Standing Front Accessible All cabinets feature 100% rated Copper Bus PRODUCT FEATURES Fully Automatic Transfer Switch Microprocessor Controls for Generator to Utility Transfer Electromechanical Controls for Generator to Utility or Utility to Utility Transfers Manual Operation NEMA 3R Free Standing Enclosure Self Contained Power Switching Assembly Dedicated Exclusively to the Fire Pump Includes Lockable Isolation Switch Load Test Switch Surge Suppression Audible Alarm Source Available Pilot Lights PRODUCT OPTIONS Enclosure Painted Red Service Entrance Rated Overcurrent Protection on both sources in a Utility to Utility application Optional Lugs FC Series Fire Pump Automatic Transfer Switch

31 FC SERIES - AUTOMATIC TRANSFER SWITCH Ampere Style A B C D E Lugs MCM Weight Lbs. 225 Free Standing (1) 2/0-500* Free Standing (1) 2/0-500* Free Standing (2) Free Standing (3) Free Standing (3) Free Standing (3) This Lug is also capable of accommodating (2) 2/0-250 MCM cables. FC Series Fire Pump Automatic Transfer Switch

32 FC SERIES - AUTOMATIC TRANSFER SWITCH ORDERING INSTRUCTIONS MC D A C M S F* POLES AMPS VOLTAGE-PHASE-WIRE-HERTZ CONTROLS WITHSTAND A=120/ E = Electromechanical S = Standard B=120/ M = Microprocessor 12 VDC H = High C=277/ P = Microprocessor 24 VDC V = Very High 0600 D= E=127/ F= G=120/ H=220/ I= J= K= L= *These Enclosures are NEMA 3R Free Standing FC Series Fire Pump Automatic Transfer Switch

33 FIRE PUMP CONTROL ACCESSORY - FPC The Fire Pump Control accessory includes all features necessary for a Lake Shore Dual Motor or Insulated Case Automatic Transfer Switch to meet or exceed NFPA 20 (Chapter 10), U.L and NEMA ICS requirements for an Automatic Transfer Switch to be used in a Fire Pump Circuit. NFPA 20 requires the Automatic Transfer Switch to be a self-contained power switching assembly, housed in a separate enclosure. The transfer switch is dedicated to the fire pump load exclusively and is both electrically or manually operable and mechanically held. An Isolating Switch, located within the Transfer switch enclosure and externally operable, is provided ahead of the input terminals of the emergency side of the switch. Lake Shore Electric Accessory FPC, which is for a Utility (Normal) source and Generator (Alternate) source, includes all of the following LSEC accessories which comprise a fire pump control package that conforms to NFPA 20: Time Delay Engine Start - Provides an adjustable delay after normal source failure before initiating engine start signal of emergency source. Time Delay Return - Provides a delay after the return of normal power before re transferring the load from the emergency source. Time Delay Transfer - Allows for a time delay in the neutral position between opening the contacts on one source and closing the contacts on the other source. Under Voltage/Phase Rotation Relay - Provided on the Normal source for close-differential monitoring of the Normal source voltage to ensure that it is within acceptable limits and proper phase rotation. Frequency-Voltage Relay - Provides protection against transferring to the emergency source until the generator has reached both operating frequency and voltage Start Contact - Starting Contact provides for starting an engine when initiated by the Transfer Switch. Auxiliary Contacts - Provided on the emergency source to indicate remotely that the Transfer Switch has been transferred to the Alternate source. Pilot Lights - Provide two indicating lights mounted on the exterior of the Transfer Switch enclosure showing to which source the load is connected. Special Devices - Other devices necessary to meet the requirements of NFPA 20, listed below: Isolation Switch which is lockable in the open position Audible alarm on opening of the isolation switch Visual indication of isolation switch position Auxiliary contacts for remote annunciation of isolation switch position Surge Suppression - Protection for the Transfer switch from transient voltage surges which may harm the control circuitry. Load Test Switch - Provides engine starting plus transfer of the load to the emergency source. This switch is door mounted. Labels & Markings - Transfer switch will be labeled as required by U.L and NFPA 20 for use in a fire pump circuit. The most common type of installation uses an on site engine generator set as the emergency power source. The single line of this configuration is shown on page 2. The over current protection shown on the normal side, (item A) can be incorporated in the Lake Shore Electric Fire Pump Transfer Switch by ordering it as service entrance rated. The over current protection shown on the emergency side, (item B) which is required in the event the alternative source is provided by a second utility, or the generator is larger than 225% of the fire pump motor s rated full load current, can also be incorporated into the Lake Shore Electric Fire Pump Transfer Switch by ordering it with over current protection on emergency. Fire Pump Control Accessory

34 FIRE PUMP CONTROL ACCESSORY - FPC ENCLOSURES The Automatic Transfer Switch with Fire Pump Control requires a larger enclosure than th standard Automatic Transfer Switches. All will be NEMA 3R Free Standing per NFPA Ampere ATS - 70 H x 33 W x 18 D Ampere ATS - 92 H x 42 W x 20 D Fire Pump Control Accessory

35 FREQUENCY & VOLTAGE SENSING RELAY - FVR DESCRIPTION The Lake Shore Electric Frequency Voltage Relay is UL Listed and monitors the frequency and voltage of a 120 VAC Single phase source. Frequency Voltage Relays are used to accept a minimum value of a source voltage and frequency, in this case 90% voltage and 97% frequency, prior to application of this source to a load. When the voltage and frequency attain a value equal to or greater than the pickup settings, the output contacts change state and the LED is energized. When the voltage falls below 50% of nominal, the output contacts revert to their de-energized state and the LED is de-energized. FEATURES The Lake Shore Electric Frequency/Voltage Relay utilizes single phase solid-state sensing with a dry set of contacts for the customers use. Additionally supplied is an LED, which is visible from the front of the unit, to indicate the relay s contact position. The unit can be adjusted in the field, but it is strongly recommended that the field service personnel contact the factory before any modifications are performed. APPLICATION A typical application of a Frequency/Voltage Relay is to monitor the ascending voltage and frequency of an emergency generator and prevent application to the load bus until a minimum acceptable value of that generator s output is attained. Additionally the unit is designed to have a dropout setting of less than 50% of the nominal operating value. This enables the emergency source to remain online as long as possible prior to removing it from the load. Frequency & Voltage Sensing Relay

36 FREQUENCY & VOLTAGE SENSING RELAY - FVR SPECIFICATIONS PART NUMBER 70LSEFV INPUT VOLTAGE 120 volts A.C. ± 10% INPUT FREQUENCY hertz ACCURACY ± 2% of nominal over operating temperature range TRANSIENT 110% of nominal continuously 150% of nominal 10 seconds 200% of nominal 1 second POWER CONSUMPTION 3 VA maximum TEMPERATURE Operating 20 C to +60 C Storage 40 C to +80 C CONTACT TYPE One form C dry contact RATING volts A.C. or 28 volts D.C. resistive WEIGHT 20 ounces HIGH POT Minimum of 2X nominal voltage + 1,000 volts CONSTRUCTION Solid state sensor with relay output housed in a steel enclosure APPROVED BY U.L. OPERATION When the frequency and voltage of the supply attains a value in the shaded area of the operating characteristics graph, the output contacts change state and the LED turns on. When the frequency or voltage of the supply drops below 50% of nominal, the out put contacts revert to the de-energized state and the LED turns off. FACTORY SETTINGS 50 Hz. - set for 48 Hz. and 108 VAC pickup 60 Hz. - set for 58 Hz. and 108 VAC pickup Frequency & Voltage Sensing Relay

37 FULL LOAD AMPERE RATINGS GENERATOR RATING - 3 PHASE AMPERES - 80% POWER FACTOR KVA KW 208V 240V 480V 600V 2400V 4160V 13800V Full Load Ampere Ratings

38 FULL LOAD AMPERE RATINGS MOTOR RATING - THREE PHASE AC MOTORS - 80% POWER FACTOR FULL LOAD CURRENT IN AMPERES INDUCTION-TYPE SQUIRREL CAGE & WOUND ROTOR HP V V V V 2300V 1/ / / / Full Load Ampere Ratings

39 FULL LOAD AMPERE RATINGS SINGLE PHASE AMPERES - 80% POWER FACTOR KVA KW 115V 120V 230V 240V AMPERES - DC KW 115V 120V 125V 230V 240V 250V Full Load Ampere Ratings

40 GENERATOR SURGE PROTECTOR Medium Voltage Surge Pack Provides surge protection for AC rotating machines operating at output voltages from 2,400 VAC to 24,000 VAC. Most often installed at the generator output terminals. Limits voltage peaks to reduce stress on medium voltage generators. PRODUCT FEATURES NEMA 3R Enclosures Suitable for Indoor & Outdoor applications Protection from damaging overvoltage conditions Includes station class arrester to shunt high voltages to ground Includes protective capacitor to shunt the high dv/dt to ground Increased reliability of rotating machinery Decreases down time of rotating machinery All cabinets feature 100% rated Copper Bus Generator Surge Protector

41 GENERATOR SURGE PROTECTOR TABLE A - DELTA & UNGROUNDED NEUTRAL SYSTEMS Voltage Rating Volts rms (L-L) Model Number Arrester Rating kv rms Arrester MCOV kv rms Capacitor Microfarads per pole Weight Pounds A Inches B Inches C Inches D Inches F XXX 53 XXX F XXX F XXX 53 XXX F XXX 53 XXX F XXX 53 XXX F XXX 53 XXX F XXX 53 XXX Voltage Rating Volts rms (L-L) TABLE B - GROUNDED NEUTRAL SYSTEMS Model Arrester Arrester Capacitor Weight A B Number Rating MCOV Microfarads Pounds Inches Inches kv rms kv rms per pole C Inches D Inches G XXX 53 XXX G XXX 53 XXX G XXX 53 XXX ORDERING INSTRUCTIONS Determine the configuration of the generator output connections (i.e. delta or wye, grounded or ungrounded) and then select the model number from the appropriate table above based on the lint to line voltage. Generator Surge Protector

42 GROUND FAULT INDICATION - GFI Article of the National Electric Code states The alternate source for emergency systems shall not be required to have ground fault protection of equipment with automatic disconnecting means. Although this is an exception to Article , it provides the designer of a system the ability to exercise judgment in the balance between risking damage to equipment verses loss of the emergency power source. This article does, however, require Ground Fault Indication be provided for the emergency source. Article of the National Electric Code states Audible and visual signal devices shall be provided, where practicable, for Ground Fault. To indicate a ground fault in solidly grounded Wye emergency systems of 150 volts to ground and circuit protective devices rated 1,000 amperes or more. The sensor for the ground fault signal devices shall be located at, or ahead of the main system disconnecting means for the emergency source, and the maximum setting of the signal devices shall be for a ground fault current of 1200 amperes. Instruction on the course of action to be taken in event of indicated ground fault shall be located at or near the sensor location. Therefore the detection of a ground fault on an emergency service is desirable. However, Automatic Disconnect in the event of such a fault may not be appropriate. Article 517 requires that any Ground Fault sensing for on site generating units shall be indication only. Article (A) states, where ground fault protection is provided for operation of the service disconnecting means or feeder disconnecting means as specified by or , an additional step of ground fault protection shall be provided in the next level of feeder disconnecting means downstream toward the load. Such protection shall consist of overcurrent devices and current transformers or other equivalent protective equipment that shall cause the feeder disconnecting means to open. The additional levels of ground fault protection shall not be installed as follows: 1) On the load side of an essential electrical system transfer switch 2) Between the on-site generating unit(s) described in (B) and the essential electrical system transfer switch(es) 3) On electrical systems that are not solidly grounded Wye systems with greater than 150 volts to ground but not exceeding 600 volts phase-to-phase. When Ground Fault Indication is specified on a Lake Shore Electric Corporation Transfer Switch the fault will be annunciated, however the ATS will remain in the automatic mode and will allow the closing of either source to the known fault. For Delta connected systems, please consult the factory. Ground Fault Indication Accessory

43 GROUND FAULT PROTECTION - GFP Ground faults in any power distribution system require special consideration. A ground fault occurs whenever a phase conductor develops an electrically conductive path to ground. This path may be caused by deteriorated insulation, mechanical damage, surges, heat, aging, the presence of rodents and the intrusion of foreign objects such as tools into bare bus compartments. A ground fault may develop as a bolted fault and or arcing fault. Ground fault protection will protect against either type if properly set. A bolted fault occurs when a phase conductor is solidly connected to ground. This produces a high fault current which dissipates energy throughout the distribution system. An arcing fault occurs when a phase conductor develops an electrically conductive path to ground, but is not solidly connected to ground. This path develops an arcing fault which, if self-sustaining, is capable of releasing tremendous energy at the point of fault. This tremendous energy, released at low current levels over a period of time, creates devastating results sufficient to ignite fires. The I.E.E.E. studies indicate that the typical arcing fault current is only 38% of the bolted fault current. It is this low current level that renders normal over current protection useless. The only recourse is to add supplemental relaying to secure adequate protection. The National Electric Code requires in Article : Ground fault protection of equipment shall be provided for solidly grounded Wye electrical services of more than 150 volts to ground, but not exceeding 600 volts phase to phase for each service disconnecting means rated 1,000 amperes or more. The voltage range for ground fault protection is specified since arcing faults in circuits less than 150 VAC to ground are usually self-extinguishing and arcing faults in circuits over 600 VAC line to line approach bolted fault levels which may be detected by ordinary phase over current devices if the system is solidly grounded. When a ground fault is detected, the Normal and/or the Emergency source will be opened, isolating the ground fault from the external voltage source. To insure that the alternate source will not be closed to a known fault. The Automatic Transfer Switch will be inhibited from transferring to the alternate source until: 1) the fault is cleared 2) Automatic Transfer Switch is manually reset and 3) Ground Fault Relay is reset by pushing the Reset Pushbutton The maximum setting of the ground fault protection shall be 1200 amperes, and the maximum time delay shall be one second for ground fault currents equal to or greater than 3000 amperes. For Delta connected systems, please consult the factory. Ground Fault Protection is not required for a continuous industrial process where a non-orderly shutdown will introduce additional or increased hazards. Ground Fault Protection Accessory

44 IEEE DEVICE NUMBERS & FUNCTIONS The devices in switching equipment are referred to by numbers, with appropriate suffix letters when necessary, according to the functions they perform. These numbers are based on a system adopted as standard for automatic switchgear by IEEE and incorporated in American Standard C This system is used in connection diagrams, in instruction books and in specifications. DEVICE NO. DEFINITION AND FUNCTION 1 Master Element is the initiating device, such as a control switch voltage relay, float switch, etc. which serves either directly or through such permissive devices as protective and time-delay relays to place an equipment in or out of operation. 2 Time Delay starting or closing relay is a device which functions to give a desired amount of time delay before or after any point of operation in a switching sequence or protective relay system, except as specifically provided by device functions 48, 62 and 79 described later. 3 Checking or interlocking relay is a device which operates in response to the position of a number of other devices (or to a number of predetermined conditions) in equipment to allow an operating sequence to proceed, to stop or to provide a check of the position of these devices or of these conditions for any purpose. 4 Master Contactor is a device, generally controlled by device No. 1 or equivalent and the required permissive and protective devices, that serve to make and break the necessary control circuits to place equipment into operation under the desired conditions and to take it out of operation under other or abnormal conditions. 5 Stopping Device functions to place and hold equipment out of operation. 6 Starting Circuit Breaker is a device whose principal function is to connect a machine to its source of starting voltage. 7 Anode Circuit Breaker is one used in the anode circuits of a power rectifier for the primary purpose of interrupting the rectifier circuit if an arc back should occur. 8 Control power disconnecting device is a disconnective device - such as a knife switch, circuit breaker or pullout fuse block - used for the purpose of connecting and disconnecting, respectively, the source of control power to and from the control bus or equipment. IEEE Device Numbers and Functions for Switchgear

45 IEEE DEVICE NUMBERS & FUNCTIONS Note: Control power is considered to include auxiliary power which supplies such apparatus as small motors and heaters. 9 Reversing Device is used for the purpose of reversing a machine field or for performing any other reversing functions. 10 Unit Sequence Switch is used to change the sequence in which units may be placed in and out of service in multiple-unit equipment. 11 Reserved for future application. 12 Overspeed Device is usually a direct connected speed switch which functions on machine overspeed. 13 Synchronous-speed Device, such as a centrifugal-speed switch, a slip frequency relay, a voltage relay, an undercurrent relay or any type of device, operates at approximately synchronous speed of a machine. 14 Underspeed Device functions when the speed of a machine falls below a predetermined value. 15 Speed or Frequency Matching Device functions to match and hold the speed or the frequency of a machine or of a system equal to, or approximately equal to, that of another machine source or system. 16 Reserved for future application. 17 Shunting or Discharge Switch serves to open or to close a shunting circuit around any piece of apparatus (except a resistor), such as a machine field, a machine armature, a capacitor or a reactor. Note: This excludes devices which perform such shunting operations as may be necessary in the process of starting a machine by devices 6 or 42, or their equivalent, and also excludes device 73 function which serves for the switching of resistors. 18 Accelerating or Decelerating Device is used to close or to cause the closing of circuits which are used to increase or to decrease the speed of a machine. 19 Starting-to-Running Transition Contactor is a device which operates to initiate or cause the automatic transfer of a machine from the starting to the running power connection. 20 Electrically Operated Valve is a solenoid- or motor-operated valve which is used in vacuum, air, gas, oil, water or similar lines. IEEE Device Numbers and Functions for Switchgear

46 IEEE DEVICE NUMBERS & FUNCTIONS Note: The function of the valve may be indicated by the insertion of descriptive words such as Brake or Pressure Reducing in the function name, such as Electrically Operated Brake Valve. 21 Distance Relay is a device which functions when the circuit admittance, impedance or reactance increases or decreases beyond predetermined limits. 22 Equalizer Circuit Breaker is a breaker which serves to control or to make and break the equalizer or the current-balancing connections for a machine field, or for regulating equipment, in a multiple-unit installation. 23 Temperature Control Device functions to raise or to lower the temperature of a machine or other apparatus, or of any medium, when its temperature falls below, or rises above, a predetermined value. Note: An example is a thermostat which switches on a space heater in a switchgear assembly when the temperature falls to a desired value as distinguished from a device which is used to provide automatic temperature regulation between close limits and would be designated as 90T. 24 Reserved for future application. 25 Synchronizing or Synchronism-Check Device operates when two AC circuits are within the desired limits of frequency, phase angle or voltage, to permit or to cause the paralleling of these two circuits. 26 Apparatus Thermal Device functions when the temperature of the shunt field or the armortisseur winding of a machine, or that of a load limiting or load shifting resistor or of a liquid or other medium, exceeds a predetermined value; or if the temperature of the protected apparatus, such as a power rectifier, or of any medium, decreases below a predetermined value. 27 Undervoltage Relay is a device which functions on a given value of undervoltage. 28 Flame Detector is a device that monitors the presence of the pilot or main flame in such apparatus as a gas turbine or a steam boiler. 29 Isolating Contactor is used expressly for disconnecting one circuit from an other for the purposes of emergency operation, maintenance or test. 30 Annunciator Relay is a non-automatically reset device which gives a number of separate visual indications upon the functioning of protective devices, and which may also be arranged to perform a lockout function. IEEE Device Numbers and Functions for Switchgear

47 IEEE DEVICE NUMBERS & FUNCTIONS 31 Separate Excitation Device connects a circuit such as the shunt field of a synchronous converter to a source of separate excitation during the starting sequence; or one which energizes the excitation and ignition circuits of a power rectifier. 32 Directional Power Relay is one which functions on a desired value of power low in a given direction, or upon reverse power resulting from arc back in the anode or cathode circuits of a power rectifier. 33 Position Switch makes or breaks contact when the main device or piece of apparatus, which has no device function number, reaches a given position. 34 Master Sequence Device is a device such as a motor-operated multi-contact switch, or the equivalent, or a programming device such as a computer, that establishes or determines the operating sequence of the major devices in equipment during starting and stopping, or during other sequential switching operations. 35 Brush-Operating or Slip-Ring-Short-Circuiting Device is used for raising, lowering, or shifting the brushes of a machine, or for short-circuiting its slip rings, or for engaging or disengaging the contacts of a mechanical rectifier. 36 Polarity or Polarizing Voltage Device operates or permits the operation of another device on a predetermined polarity only or verifies the presence of a polarizing voltage in equipment. 37 Undercurrent or Underpower Relay functions when the current or power flow decreases below a predetermined value. 38 Bearing Protective Device functions on excessive bearing temperature, or on other abnormal mechanical conditions, such as undue wear, which may eventu ally result in excessive bearing temperature. 39 Mechanical Condition Monitor is a device that functions upon the occurrence of an abnormal mechanical condition (except that associated with bearings as covered under device function 38), such as excessive vibration, eccentricity, expansion, shock, tilting, or seal failure. 40 Field Relay Functions on a given or abnormally low value or failure of machine field current, or on an excessive value of the reactive component of armature current in an ac machine indicating abnormally low field excitation. 41 Field Circuit Breaker is a device which functions to apply, or to remove, the field excitation of a machine. IEEE Device Numbers and Functions for Switchgear

48 IEEE DEVICE NUMBERS & FUNCTIONS 42 Running Circuit Breaker is a device whose principal function is to connect a machine to its source of running voltage after having been brought up to the desired speed on the starting connection. 43 Manual Transfer or Selector Device transfers the control circuits so as to modify the plan of operation of the switching equipment or of some of the devices. 44 Unit Sequence Starting Relay is a device which functions to start the next available unit in a multiple-unit equipment on the failure or on the non-availability of the normally preceding unit. 45 Atmospheric Condition Monitor is a device that functions upon the occurrence of an abnormal atmospheric condition, such as damaging fumes, explosive mixtures, smoke, or fire. 46 Reverse-Phase or Phase-Balance Current Relay is a relay which functions when the polyphase currents are of reverse-phase sequence, or when the polyphase currents are unbalanced or contain negative phase-sequence components above a given amount. 47 Phase-Sequence Voltage Relay is a device which functions upon a predetermined value of polyphase voltage in the desired phase sequence. 48 Incomplete Sequence Relay is a device which returns the equipment to the normal, or off, position and locks it out if the normal starting, operating or stopping sequence is not properly completed within a predetermined time. 49 Machine or Transformer Thermal Relay is a relay which functions when the temperature of a machine armature, or other load carrying winding or element of a machine, or the temperature of a power rectifier or power trans former (including a power rectifier transformer) exceeds a predetermined value. 50 Instantaneous Overcurrent, or Rate-of-Rise Relay is a relay that functions instantaneously on an excessive value of current, or on an excessive rate of current rise, thus indicating a fault in the apparatus of circuit being pro tected. 51 AC Time Overcurrent Relay is a relay with either a definite or inverse time characteristic that functions when the current in an ac circuit exceeds a predetermined value. 52 AC Circuit Breaker is a device that is used to close and interrupt an ac power circuit under normal conditions or to interrupt this circuit under fault or emergency conditions. IEEE Device Numbers and Functions for Switchgear

49 IEEE DEVICE NUMBERS & FUNCTIONS 53 Exciter or DC Generator Relay is a relay that forces the dc machine field excitation to build up during starting or which functions when the machine voltage has built up to a given value. 54 High-Speed DC Circuit Breaker is a device which starts to reduce the current in the main circuit in 0.01 second or less, after the occurrence of the dc overcurrent or the excessive rate of current rise. 55 Power Factor Relay is a relay that operates when the power factor in an ac circuit rises above or below a predetermined value. 56 Field Application Relay is a relay that automatically controls the application of the field excitation to an ac motor at some predetermined point in the slip cycle. 57 Short-Circuiting or Grounding Device is a power or stored energy operated device that functions to short-circuit or to ground a circuit in response to automatic or manual means. 58 Power Rectifier Misfire Relay is a device which functions if one or more of the power rectifier anodes fail to fire. 59 Overvoltage Relay is a relay that functions on a given value of overvoltage. 60 Voltage or Current Balance Relay is a relay that operates on a given difference in voltage or current input or output of two circuits. 61 Current Balance Relay is a device which operates on a given difference in current input or output of two circuits. 62 Time-Delay Stopping or Opening Relay is a time-delay relay that serves in conjunction with the device which initiates the shutdown, stopping or opening operation in an automatic sequence. 63 Liquid or Gas Pressure, Level or Flow Relay is a relay that operates on given values of liquid or gas pressure, flow or level, or on a given rate of change of these values. 64 Ground Protective Relay is a relay that functions on failure of the insulation of a machine, transformer or of other apparatus to ground, or on flashover of a dc machine to ground. IEEE Device Numbers and Functions for Switchgear

50 IEEE DEVICE NUMBERS & FUNCTIONS Note: This function is assigned only to a relay which detects the flow of current from the frame of a machine or enclosing case or structure of a piece of apparatus to ground, or detects a ground on a normally ungrounded winding or circuit. It is not applied to a device connected in the secondary circuit or secondary neutral of a current transformer, connected in the power circuit of a normally grounded system. 65 Governor is the equipment which controls the gate or valve opening of a prime mover. 66 Notching or Jogging Device functions to allow only a specified number of operations of a given device, or equipment, or a specified number of successive operations within a given time of each other. It also functions to energize a circuit periodically, or for fractions of specified time intervals, or that is used to permit intermittent acceleration or jogging of a machine at low speeds for mechanical positioning. 67 AC Directional Overcurrent Relay is a relay that functions on a desired value of ac overcurrent flowing in a predetermined direction. 68 Blocking Relay is a relay that initiates a pilot signal for blocking of tripping on external faults in a transmission line or in other apparatus under predetermined conditions, or cooperates with other devices to block tripping or to block reclosing on a out-of-step condition or on power swings. 69 Permissive Control Device is generally a two-position, manually operated switch that, in one position, permits the closing of a circuit breaker or the placing of equipment into operation and, in the other position, prevents the circuit breaker or the equipment from being operated. 70 Electrically Operated Rheostat which is used to vary the resistance of a circuit in response to some means of electrical control. 71 Level Switch is a switch which operates on given values, or on a given rate of change, of level. 72 DC Circuit Breaker is used to close and interrupt a dc power circuit under normal conditions or to interrupt this circuit under fault or emergency conditions. 73 Load-Resistor Contactor is used to shunt or insert a step of load limiting, shifting or indicating resistance in a power circuit, or to switch a space heater in circuit, or to switch a light, or regenerative load resistor of a power rectifier or other machine in and out of circuit. IEEE Device Numbers and Functions for Switchgear

51 IEEE DEVICE NUMBERS & FUNCTIONS 74 Alarm Relay is a device other than an annunciator, as covered under device No. 30, which is used to operate, or to operate in connection with, a visual or audible alarm. 75 Position Changing Mechanism is a mechanism that is used for moving a main device from one position to another in equipment; as for example, shifting a removable circuit breaker unit to and from the connected, disconnected and test positions. 76 DC Overcurrent Relay is a relay that functions when the current in a dc circuit exceeds a given value. 77 Pulse Transmitter is used to generate and transmit pulses over a telemetering or pilot-wire circuit to the remote indicating or receiving device. 78 Phase Angle Measuring or Out-of-Step Protective Relay is a relay that functions at a predetermined phase angle between two voltages or between two currents or between voltage and current. 79 AC Eeclosing Relay is a relay that controls the automatic reclosing and locking out of an ac circuit interrupter. 80 Flow Switch is a switch which operates on given values, or on a given rate of change, of flow. 81 Frequency Relay is a relay that functions on a predetermined value of frequency - either under or over or on normal system frequency - or rate of change of frequency. 82 DC Reclosing Relay is a relay that controls the automatic closing and reclosing of a dc circuit interrupter, generally in response to load circuit conditions. 83 Automatic Selective Control or Transfer Relay is a relay that operates to select automatically between certain sources or conditions in equipment, or performs a transfer operation automatically. 84 Operating Mechanism is the complete electrical mechanism or servo-mechanism, including the operating motor, solenoids, position switches, etc., for a tap changer, induction regulator or any similar piece of apparatus which has no device function number. 85 Carrier or Pilot-Wire Receiver Relay is a relay that is operated or restrained by a signal used in connection with carrier-current or dc pilot-wire fault directional relaying. IEEE Device Numbers and Functions for Switchgear

52 IEEE DEVICE NUMBERS & FUNCTIONS 86 Locking-Out Relay is an electrically operated hand or electrically reset relay that functions to shut down and hold an equipment out of service on the occurrence of abnormal conditions. 87 Differential Protective Relay is a protective relay that functions on a percentage or phase angle or other quantitative difference of two currents or of some other electrical quantities. 88 Auxiliary Motor or Motor Generator is one used for operating auxiliary equipment such as pumps, blowers, exciters, rotating magnetic amplifiers, etc. 89 Line Switch is used as a disconnecting load interrupter or isolating switch in an ac or dc power circuit, when this device is electrically operated or has electrical accessories, such as an auxiliary switch, magnetic lock, etc. 90 Regulating Device functions to regulate a quantity, or quantities, such as voltage, current, power, speed, frequency, temperature, and load at a certain value or between certain limits for machines, tie lines or other apparatus. 91 Voltage Directional Relay is a relay that operates when the voltage across an open circuit breaker or contactor exceeds a given value in a given direction. 92 Voltage and Power Directional Relay is a relay that permits or causes the connection of two circuits when the voltage difference between them exceeds a given value in a predetermined direction and causes these two circuits to be disconnected from each other when the power flowing between them exceeds a given value in the opposite direction. 93 Field Changing Contactor functions to increase or decrease in one step the value of field excitation on a machine. 94 Tripping or Trip-Free Relay functions to trip a circuit breaker, contactor, or equipment, or to permit immediate tripping by other devices; or to prevent immediate reclosure of a circuit interrupter, in case it should open automatically, even though its closing circuit is maintained closed Used only for specific applications on individual 97 installations where none of the assigned numbered 98 functions from 1 to 94 is suitable. 99 IEEE Device Numbers and Functions for Switchgear

53 IC SERIES - AUTOMATIC TRANSFER SWITCH Insulated Case Automatic Transfer Switch Ampere UL 1008 Listed Dependable, Positive Transfer Safe to Transfer Under Load Dead Front Design Rear Access Only for Safety Up To 200 kaic Fixed Breakers PRODUCT FEATURES Fully Automatic Transfer Switch Microprocessor Controls Free Standing Enclosure Five Time Delays Source Available & Switch Postion Pilot Lights Maintenance Disconnect Switch Override Pushbutton Closed Differential Undervoltage Relay Overcurrent Pilot Light Plant Exerciser, Load Selectable Load Test Cycle Switch All cabinets feature 100% rated Copper Bus PRODUCT OPTIONS Enclosure Options: NEMA 1, NEMA 12, NEMA 3R, NEMA 4, NEMA 4X, NEMA 3R (304) Stainless Steel Closed Transition Transfer Ground Fault Protection Load Demand Inhibit Peak Shave Contact Remote Disconnect Space Heater Single Phase Protection Surge Supression Customer Specified Withstand Ratings Draw-Out Breakers IC Series Insulated Case Automatic Transfer Switch

54 IC SERIES - AUTOMATIC TRANSFER SWITCH Insulated Case Elements Ampere Style A B C D E Lugs # & Weight Lbs. MCM 800 Fixed (4) Draw Out (4) Fixed (4) Draw Out (4) Fixed (8) Draw Out (8) Fixed (8) Draw Out (8) Fixed (8) Draw Out (8) Fixed (12) Draw Out (12) All Enclosures listed above are Free Standing and require rear access. IC Series Insulated Case Automatic Transfer Switch

55 IC SERIES - AUTOMATIC TRANSFER SWITCH ORDERING INSTRUCTIONS IC F A C P S F CONFIGURATION POLES AMPS VOLTAGE-PHASE- WIRE-HERTZ CONTROLS WITHSTAND ENCLOSURE FREE STANDING F - Fixed A=120/ M = 12 VDC S = Standard F=NEMA 3R D - Draw Out B=120/ P = 24 VDC H = High H=NEMA C=277/ E = Electro. V = Very High J=NEMA 4X* 2000 D= L=NEMA 3R* 2500 E=127/ O=Open (no enclosure) 3000 F= X=Special (by description) 4000 G=120/ H=220/ I= J= K= L= * These Enclosures are 304 Stainless Steel IC Series Insulated Case Automatic Transfer Switch

56 MTS SERIES - MANUAL TRANSFER SWITCH Manual Transfer Switch Ampere UL 1008 Listed Dependable, Positive Transfer Safe to Transfer Under Load Wall Mount or Free Standing Fixed or Draw-out Elements Withstand Ratings up to 200kAIC PRODUCT FEATURES Dependable Transfer Switch Front Accessible Amp Dead Front Amp requiring rear access 2, 3 & 4 Pole Configurations Commonly Installed with a Lake Shore Quick Connection Cabinet All cabinets feature 100% rated Copper Bus PRODUCT OPTIONS Enclosure Options: NEMA 1, NEMA 12, NEMA 3R, NEMA 4, NEMA 4X, NEMA 3R (304) Stainless Steel Service Entrance Electrical Assist Ground Fault Protection Space Heater Single Phase Protection Surge Suppression Aux. Contacts for Switch Position & Source Available Pilot Lights for Switch Position & Source Available Draw-out Elements MTS Series Manual Transfer Switch

57 MTS SERIES - MANUAL TRANSFER SWITCH Molded Case Elements Ampere Style A B C D E Lugs MCM Weight Lbs. 100 Wall Mount (1) #4-4/ Free Standing na na (1) #4-4/ Wall Mount (1) 3/ Free Standing (1) 3/ Wall Mount (1) 2/0-500* Free Standing (1) 2/0-500* Wall Mount (2) Free Standing (2) Wall Mount (3) Free Standing (3) Wall Mount (3) Free Standing (3) Wall Mount (3) Free Standing (3) *This Lug is also capable of accommodating (2) 2/0-250 MCM cables. MTS Series Manual Transfer Switch

58 MTS SERIES - MANUAL TRANSFER SWITCH Insulated Case Elements Ampere Style A B C D E Lugs # & MCM Weight Lbs. 800 Fixed (4) Draw Out (4) Fixed (4) Draw Out (4) Fixed (8) Draw Out (8) Fixed (8) Draw Out (8) Fixed (8) Draw Out (8) Fixed (12) Draw Out (12) Fixed (12) Draw Out (12) All Enclosures listed above are Free Standing and require rear access. MTS Series Manual Transfer Switch

59 MTS SERIES - MANUAL TRANSFER SWITCH ORDERING INSTRUCTIONS MC D M C E S E POLES AMPS VOLTAGE-PHASE-WIRE-HERTZ WITHSTAND ENCLOSURE A=120/ S = Standard A=NEMA 1 Wall Mount B=120/ H = High B=NEMA 1 Free Standing C=277/ V = Very High C=NEMA 12 Wall Mount 0600 D= D=NEMA 12 Free Standing 0800 E=127/ E=NEMA 3R Wall Mount 1000 F= F=NEMA 3R Free Standing 1200 G=120/ G=NEMA 4 Wall Mount H=220/ I= J= K= L= H=NEMA 4 Free Standing I=NEMA 4X Wall Mount* J=NEMA 4X Free Standing* K=NEMA 3R Wall Mount* L=NEMA 3R Free Standing* O=Open (no enclosure) X=Special (by description) * These Enclosures are 304 Stainless Steel ORDERING INSTRUCTIONS IC F M C E S F POLES AMPS VOLTAGE-PHASE-WIRE-HERTZ WITHSTAND ENCLOSURE Fixed A=120/ S = Standard F=NEMA 3R Free Standing Draw Out B=120/ H = High H=NEMA 4 Free Standing 1600 C=277/ V = Very High J=NEMA 4X Free Standing* 2000 D= L=NEMA 3R Free Standing* 2500 E=127/ O=Open (no enclosure) 3000 F= X=Special (by description) 4000 G=120/ H=220/ I= J= K= L= * These Enclosures are 304 Stainless Steel MTS Series Manual Transfer Switch

60 MV SERIES - MEDIUM VOLTAGE TRANSFER SWITCH Medium Voltage Transfer Switches Ampere Dependable, Positive Transfer Safe to Transfer Under Load Dead Front Design Rear Access Only for Safety Vacuum Circuit Breakers All cabinets feature 100% rated Copper Bus PRODUCT FEATURES Automatic or Manual Transfer Switch Microprocessor Controls Free Standing Enclosure Two Electrically & Mechanically Interlocked Vacuum Breakers with Two Step Stored Energy Mechanism Breakers with 3-Cycle (50ms) Interrupting Time & Mechanical Endurance up to 20,000 Operations Short Circuit Ratings of 40 RMS NEMA 2-Hole Pattern for Customer Supplied Compression Lugs PRODUCT OPTIONS Enclosure Options: Indoor or Outdoor Service Entrance Generator Differential Protective Relays Surge Suppression Digital Meters Draw-Out Breaker Design Special Bussing to Bus Duct Special Bussing to Existing Switchgear Seperate Cable Pull Sections Utility Metering Sections Special Protective Equipment MV Series Medium Voltage Transfer Switch

61 MV SERIES - MEDIUM VOLTAGE TRANSFER SWITCH MV Series Medium Voltage Transfer Switch

62 MV SERIES - MEDIUM VOLTAGE TRANSFER SWITCH ORDERING INSTRUCTIONS VB D A C P S F ELEMENTS OPERATION AMPS VOLTAGE CONTROLS ENCLOSURE F = Fixed A = Automatic 0600 A = 4160 M = 12 VDC B = Indoor D = Draw Out M = Manual 1200 B = 8250 P = 24 VDC F = Outdoor 2000 C = E = Electro-mechanical 2500 D = O = Other MV Series Medium Voltage Transfer Switch

63 MICROPROCESSOR NOMENCLATURE SYM DESCRIPTION SYM DESCRIPTION ACBT ACR ACRE ACRN EBA NBA BC CE CN CR DWL EAT EAW EAX ECB ECR ECT EL EMR ER ES FR FVR GFAU GFR KPE LCT LNL LTS MOR MDS MRT MRTN MSE NAT NAW NAX NC NCB NCR NCT NE NIA NL NOR NS NVB NVC AUX. CONTACT BEFORE TRANSFER AUXILIARY CONTACT RELAY AUXILIARY CONTACT RELAY EMERGENCY AUXILIARY CONTACT RELAY NORMAL BELL ALARM EMERGENCY BELL ALARM NORMAL BATTERY CHARGER CLOSE EMERGENCY CLOSE NORMAL CONTROL RELAY DERANGEMENT WARNING LIGHT EMERGENCY SWITCH IN TEST EMERGENCY SWITCH WITHDRAWN EMERGENCY AUX CONTACK EMERGENCY CIRCUIT BREAKER EMERGENCY CONTACTOR RELAY EMERGENCY CONTROL TRANSFORMER EMERGENCY LATCH EMERGENCY SOURCE AVAILABLE EMERGENCY CONTROL RELAY EMERGENCY SWITCH FREQUENCY RELAY FREQUENCY VOLTAGE RELAY GROUND FAULT ALARM UNIT GROUND FAULT RELAY KEYPAD ENABLE SWITCH LOAD CONTROL TRANSFORMER LOAD/NO LOAD TRANSFORMER LOAD TEST SWITCH MOTOR DISCONNECT RELAY MAINTENANCE DISCONNECT SWITCH MINIMUM RUN TIMER MANUAL RETURN TO NORMAL MENU SYSTEM ENABLE NORMAL SWITCH IN TEST NORMAL SWITCH WITHDRAWN NORMAL AUX CONTACK NORMAL CONTACTOR NORMAL CIRCUIT BREAKER NORMAL CONTACTOR RELAY NORMAL CONTROL TRANSFORMER NEUTRAL LUG NOT IN AUTO LED NEUTRAL LATCH NORMAL SOURCE AVAILABLE NORMAL SWITCH NORMAL VACUUM BREAKER NORMAL VACUUM CONTACTOR OE OPEN EMERGENCY ON OPEN NORMAL ORPB OVERRIDE PUSHBUTTON PE PLANT EXERCISER PE/NL PLANT EXERCISER NO LOAD PE/SL PLANT EXERCISER SWITCHABLE LOAD PE/TL PLANT EXERCISER TRANSFER LOAD PFR PHASE FAILURE RELAY PFR/O* PHASE FAILURE RELAY PFRE PHASE FAILURE RELAY EMERGENCY PFRE/O* PHASE FAILURE RELAY EMERGENCY PFRN PHASE FAILURE RELAY NORMAL PFRN/O* PHASE FAILURE RELAY NORMAL PL PILOT LIGHTS PS PEAK SHAVE PT POTENTIAL TRANSFORMER R RETURN RELAY RPE REVERSE POWER EMERGENCY RPN REVERSE POWER NORMAL RPRE REVERSE POWER RELAY EMERGENCY RPRN REVERSE POWER RELAY NORMAL SCR SYNC CHECK RELAY SE SERVICE ENTRANCE SH STRIP HEATER SIE SWITCH IN EMERGENCY SIN SWITCH IN NORMAL SSP SURGE SUPPRESSION ST SHUNT TRIP SYNC SYNCRONIZING RELAY TB TERMINAL BLOCK TDE TIME DELAY TO EMERGENCY TDEC TIME DELAY ENGINE COOL DOWN TDES TIME DELAY ENGINE START TDN TIME DELAY NEUTRAL TDR TIME DELAY TO RETURN TE TRIP EMERGENCY TH THERMOSTAT TM TRANSFER MOTOR TME TRANSFER MOTOR EMERGENCY TMN TRANSFER MOTOR NORMAL TN TRIP NORMAL TR TRANSFER RELAY TRBL TROUBLE RELAY TU TRIP UNIT UVR UNDER VOLTAGE RELAY *O = OVERVOLTAGE Microprocessor Nomenclature

64 MC SERIES - AUTOMATIC TRANSFER SWITCH Molded Case - Dual Motor Automatic Transfer Switches Ampere UL 1008 Listed Dependable, Positive Transfer Safe to Transfer Under Load Dual Motor Design Wall Mount or Free Standing Front Accessible Microprocessor Controlled Withstand Ratings up to 200kAIC PRODUCT FEATURES Fully Automatic Transfer Switch Microprocessor Controls Five Time Delays Source Available & Switch Position Pilot Lights Maintenance Disconnect Switch Override Push button Closed Differential Undervoltage Relay Overcurrent Pilot Light Plant Exerciser, Load Selectable Load Test Cycle Switch All cabinets feature 100% rated Copper Bus PRODUCT OPTIONS Enclosure Options: NEMA 1, NEMA 12, NEMA 3R, NEMA 4, NEMA 4X, NEMA 3R (304) Stainless Steel Closed Transition Transfer Ground Fault Protection Load Demand Inhibit Peak Shave Contact Remote Disconnect Space Heater Single Phase Protection Surge Suppression Customer Specified Withstand Ratings MC Series Molded Case Dual Motor Automatic Transfer Switch

65 MC SERIES - AUTOMATIC TRANSFER SWITCH Ampere Style A B C D E Lugs MCM Weight Lbs. 225 Wall Mount (1) 3/ Free Standing (1) 3/ Wall Mount (1) 2/0-500* Free Standing (1) 2/0-500* Wall Mount (2) Free Standing (2) Wall Mount (3) Free Standing (3) Wall Mount (3) Free Standing (3) Wall Mount (3) Free Standing (3) This Lug is also capable of accommodating (2) 2/0-250 MCM cables. MC Series Molded Case Dual Motor Automatic Transfer Switch

66 MC SERIES - AUTOMATIC TRANSFER SWITCH ORDERING INSTRUCTIONS MC D A C M S E POLES AMPS VOLTAGE-PHASE- WIRE-HERTZ CONTROLS WITHSTAND ENCLOSURE A=120/ M = 12 VDC S = Standard A=NEMA 1 Wall Mount B=120/ P = 24 VDC H = High B=NEMA 1 Free Standing C=277/ E = Electromechanical V = Very High C=NEMA 12 Wall Mount 0800 D= D=NEMA 12 Free Standing 1000 E=127/ E=NEMA 3R Wall Mount 1200 F= F=NEMA 3R Free Standing G=120/ H=220/ I= J= K= L= G=NEMA 4 Wall Mount H=NEMA 4 Free Standing I=NEMA 4X Wall Mount* J=NEMA 4X Free Standing* K=NEMA 3R Wall Mount* L=NEMA 3R Free Standing* O=Open (no enclosure) X=Special (by description) * These Enclosures are 304 Stainless Steel MC Series Molded Case Dual Motor Automatic Transfer Switch

67 MC SERIES - AUTOMATIC TRANSFER SWITCH Molded Case - Single Motor Automatic Transfer Switches Ampere UL 1008 Listed Dependable, Positive Transfer Safe to Transfer Under Load Single Motor Design Wall Mount or Free Standing Front Accessible Microprocessor Controlled Withstand Ratings up to 200kAIC PRODUCT FEATURES Fully Automatic Transfer Switch Microprocessor Controls Five Time Delays Source Available & Switch Position Pilot Lights Maintenance Disconnect Switch Override Push button Closed Differential Undervoltage Relay Overcurrent Pilot Light Plant Exerciser, Load Selectable Load Test Cycle Switch All cabinets feature 100% rated Copper Bus PRODUCT OPTIONS Enclosure Options: NEMA 1, NEMA 12, NEMA 3R, NEMA 4, NEMA 4X, NEMA 3R (304) Stainless Steel Ground Fault Protection Load Demand Inhibit Peak Shave Contact Remote Disconnect Space Heater Single Phase Protection Surge Suppression Customer Specified Withstand Ratings MC Series Molded Case Single Motor Automatic Transfer Switch

68 MC SERIES - AUTOMATIC TRANSFER SWITCH Ampere Style A B C D E Lugs MCM Weight Lbs. 100 Wall Mount (1) #4-4/ Free Standing na na (1) #4-4/ Wall Mount (1) 3/ Free Standing (1) 3/ Wall Mount (1) 2/0-500* Free Standing (1) 2/0-500* Wall Mount (2) Free Standing (2) This Lug is also capable of accommodating (2) 2/0-250 MCM cables. MC Series Molded Case Single Motor Automatic Transfer Switch

69 MC SERIES - AUTOMATIC TRANSFER SWITCH ORDERING INSTRUCTIONS MC S A C M S E POLES AMPS VOLTAGE-PHASE- WIRE-HERTZ CONTROLS WITHSTAND ENCLOSURE A=120/ M = 12 VDC S = Standard A=NEMA 1 Wall Mount B=120/ P = 24 VDC H = High B=NEMA 1 Free Standing C=277/ E = Electromechanical V = Very High C=NEMA 12 Wall Mount 0600 D= D=NEMA 12 Free Standing E=127/ F= G=120/ H=220/ I= J= K= L= E=NEMA 3R Wall Mount F=NEMA 3R Free Standing G=NEMA 4 Wall Mount H=NEMA 4 Free Standing I=NEMA 4X Wall Mount* J=NEMA 4X Free Standing* K=NEMA 3R Wall Mount* L=NEMA 3R Free Standing* O=Open (no enclosure) X=Special (by description) * These Enclosures are 304 Stainless Steel MC Series Molded Case Single Motor Automatic Transfer Switch

70 POSITIVE CONTROL SYSTEM for Electro-Mechanical Only DESCRIPTION The Positive Control System (PCS) is a sophisticated time delay network that provides highly dependable, adjustable control of automatic transfer switches and switchgear requiring similar control. Four plug-in solid-state and/or pneumatic controlled time delay relays provide any combination of four time delay functions; TDR, Time Delay to Return (Normal); TDE, Time Delay to Emergency; ODR, Outage Delay Relay; and EMT, Engine Maintained Timer. Starting contacts are rated 10 amperes. Each ON DELAY timer includes two colored indicating lights which display the operation of the timer. Time Delays are available over a wide selection of ranges. FEATURES Components are mounted on a printed circuit board to provide a compact, rugged design. Solid state time delay relays and sealed control relays assure dependable operation even in severe operating environments. UL-listed components have average projected electrical life of over 1,000,000 cycles. Plug-in components simplify maintenance and reduce downtime. The PCS provides optimum flexibility of transfer switch control. All adjustments are easily accessible. The normally open dry start contact provides a convenient interface to almost any engine starting control. Positive Control System