Fault Interrupters Type CI; Three-Phase Installation and Operation Instructions S275-10-1 Service Information RADIATION WARNING: See Service Information S280-90-1. Figure 1. 87863KMA Type CI electronically controlled three-phase vacuum fault interrupter. CONTENTS Safety Information...2 Shipment and Acceptance...3 Handling and Storage...3 Description...3 Maintenance Requirements...3 Electrical Ratings...3 Current...3 Spring Charging Motor...3 Trip Coil...3 Closing Solenoid...3 Duty Cycle...4 Voltage...4 Dimensions and Weights...4 Installation...5 Interrupter Mounting...5 Lifting an Interrupter...5 Control Mounting...5 Electrical Connection...8 Grounding...8 High Voltage...8 Auxiliary Power...8 Control-lnterrupter Interconnection... 8 Remote Control Wiring... 8 Leak Testing Tank... 9 Interrupter Accessories... 9 Frame Extension... 9 Auxiliary Switch... 9 Control Accessories...10 DC Trip Control...10 Relay Control...10 Instantaneous Trip Accessory...10 Target Accessory...11 Inrush Restraint Accessory...12 Operating Procedures...14 Mechanical Operation Check...15 Electrical Operation Check...15 Manual Closing...15 Manual Tripping...15 In-Service Operation...15 Initial Operation...15 Automatic Operation...15 Removing Control from Service...15 March 1989 Supersedes 10/87 1
Type CL: three-phase Installation and Operation Instructions SAFETY FOR LIFE SAFETY FOR LIFE Cooper Power Systems products meet or exceed all applicable industry standards relating to product safety. We actively promote safe practices in the use and maintenance of our products through our service literature, instructional training programs, and the continuous efforts of all Cooper Power Systems employees involved in product design, manufacture, marketing, and service. We strongly urge that you always follow all locally approved safety procedures and safety instructions when working around high voltage lines and equipment and support our Safety For Life mission. SAFETY FOR LIFE The instructions in this manual are not intended as a substitute for proper training or adequate experience in the safe operation of the equipment described. Only competent technicians who are familiar with this equipment should install, operate, and service it. A competent technician has these qualifications: Is thoroughly familiar with these instructions. Is trained in industry-accepted high- and low-voltage safe operating practices and procedures. Is trained and authorized to energize, de-energize, clear, and ground power distribution equipment. Is trained in the care and use of protective equipment such as flash clothing, safety glasses, face shield, hard hat, rubber gloves, hotstick, etc. Following is important safety information. For safe installation and operation of this equipment, be sure to read and understand all cautions and warnings. Hazard Statement Definitions SAFETY INFORMATION Safety Instructions Following are general caution and warning statements that apply to this equipment. Additional statements, related to specific tasks and procedures, are located throughout the manual. DANGER: Hazardous voltage. Contact with hazardous voltage will cause death or severe personal injury. Follow all locally approved safety procedures when working around high and low voltage lines and equipment. G103.3 WARNING: Before installing, operating, maintaining, or testing this equipment, carefully read and understand the contents of this manual. Improper operation, handling or maintenance can result in death, severe personal injury, and equipment damage. G101.0 This manual may contain four types of hazard statements: DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in equipment damage only. WARNING: This equipment is not intended to protect human life. Follow all locally approved procedures and safety practices when installing or operating this equipment. Failure to comply can result in death, severe personal injury, and equipment damage. G102.1 WARNING: Power distribution equipment must be properly selected for the intended application. It must be installed and serviced by competent personnel who have been trained and understand proper safety procedures. These instructions are written for such personnel and are not a substitute for adequate training and experience in safety procedures. Failure to properly select, install, or maintain power distribution equipment can result in death, severe personal injury, and equipment damage. G122.2 2
S275-10-1 SHIPMENT AND ACCEPTANCE The interrupter is completely assembled, inspected, adjusted, and tested at the factory. It is new, undamaged, and complete with all parts when accepted by the carrier for shipment. Upon receipt, inspect the interrupter thoroughly for damage or loss of parts incurred during shipment. If damage or loss is discovered, file a claim immediately with the carrier. HANDLING AND STORAGE If the unit is to be stored for some time before installation, keep it covered in a clean, dry storage area. Take care during handling and storage to minimize the possibility of damage. DESCRIPTION The Type Cl fault interrupter (Figure 1) is an automatic, nonreclosing, three-phase interrupting device that will interrupt currents through 12000 amps symmetrical on systems rated through 38 kv. A compact, lightweight device, the Type Cl features submersible configuration, a stored-energy mechanism and dry, solid insulated vacuum interrupters. Line currents are sensed by 1000:1 ratio, encapsulated bushing current transformers on each phase on the interrupter. This provides a continuous measurement of phase and ground currents, which are monitored by the Electronic Trip Control. When the selected minimum-trip current value is exceeded, and after a time delay, the control sends a trip signal to the interrupter operating mechanim. Control operating power is also obtained from the BCT s; thus no external power is required for timing or trip functions. The control is easily programmed for various minimum trip values and time-current characteristics for both phase and ground. The integral galvanized-steel mounting frame with predrilled mounting holes facilitates wall, floor, or ceiling mounting. The electronic control, enclosed in a weatherproof (nonsubmersible) cabinet is connected to the interrupter through two shielded plug-in cables and can be mounted on either side of the interrupter frame or at a remote location, 100 foot maximum cable length. High-voltage connections are made to either 200 amp universal bushing wells or 600 amp bushings depending on the continuous current rating of the unit. Both bushing configurations are molded as an integral part of the solid insulation system, and they interface with industry-standard 200 amp loadbreak and nonloadbreak bushing plug inserts or 600 amp shielded cable connectors. Interrupter contact opening and closing is through release of stored-spring energy. Both the opening and closing springs are charged by a 120 Vac motor which runs automatically immediately after each opening operation. A push-pull feature on the operating mechanism permits manual spring charging if motor power is lost. In addition to automatic tripping on fault current, the Type Cl can be tripped with either a remote contact, or the manual control switch on the control panel, or with the mechanically linked tripreset lever on the front of the mechanism tank. It can be closed with either a remote contact, with the manual control switich on the control panel, or with the mechanically-linked close lever on the front of the tank. Available accessories for the interrupter include a frame extension (which allows the tank to be lowered from a floor mounted interrupter) and a four-stage auxiliary switch. Control accessories include dc trip control, X-Y relay control, and instantaneous trip, target, and inrush restraint modules. MAINTENANCE REQUIREMENTS The frequency of maintenance depends upon local climatic conditions and the severity of the operating service imposed on the interrupter. Cooper Power System's recommends that, initially, a maintenance check should be made after one year of service, or the completion of a standard duty cycle, whichever occurs first. A study of maintenance records for similar equipment and the results of the initial inspection can then be used to establish routine maintenance intervals. Refer to the applicable maintenance manual for detailed maintenance and inspection procedures. WARNING: Continued use of an interrupter, without regular routine inspection and repair, can effect mechanical reliability. This could lead to equipment failure and possible personal injury. ELECTRICAL RATINGS Current Rating Description 15.5 kv 27 kv 38 kv Rated continuous current, amps 200 600 200 600 200 600 Interrupting current at rated maximum voltage, symmetrical amps 12000 12000 12000 12000 12000 12000 Rated 3-second current, symmetrical amps 12000 12000 12000 12000 12000 12000 Rated magnetizing interrupting current, amps 21 21 21 21 21 21 Rated cable charging current, amps 10 10 25 25 40 40 Spring Charging Motor Description Operating voltage Voltage range Maximum current Running current Running time (average) *60 Hz values (50 Hz values somewhat higher). Rating 120 Vac 104-127 Vac 7 amps rms* 1.6 amps rms* 25 seconds* Bi-Stable Actuator Operating Voltage Peak Current 24 Vdc 0.8 amps Closing Solenoid Operating Voltage Maximum Coil-on Voltage Range Current Time 120 Vac 104-127 Vac 3.4 amps rms 3.0 Cycles (35 ms) 3
Type CI; Three-Phase Installation and Operation Instructions Duty Cycle Percent of Number of Rated Max. Interrupter Minimum Unit Voltage Rating X/R Operations 15.5 kv 15-20 4 88 45-55 8 112 90-100 15 32 Total 232 27.0 kv 15-20 88 45-55 7 112 90-100 14 32 Total 232 38.0 kv 15-20 4 88 45-55 8 112 90-100 15 32 Total 232 DIMENSIONS AND WEIGHTS Voltage Description Rating Nominal voltage class, kv rms 14.4 24.9 34.5 Rated maximum voltage, kv rms 15.5 27 38 Rated impulse withstand voltage, (BIL) kv crest 95 125 150* 60 hertz insulation withstand, kv rms dry, one minute 35 40 60* DC insulation level withstand, kv rms dry, 15 minutes 53 78 96 Corona extinction voltage at 20 picocoulombs, kv 11 19 26 * *May be limited by cables or terminations. Description Weight (lb) Interrupter, including frame 220 Control 50 4
S275-10-1 INSTALLATION Factors to be considered before beginning installation include: available space; whether the interrupter will be wall, floor or ceiiing-mounted; whether the control will be located at the interrupter or at a remote location; routing of the highvoltage cables; and the availability of 120 Vac power near the control. Interrupter Mounting Refer to the DlMENSlONS section of these instructions for mounting dimensions. Four 1/2-inch bolts and lockwashers (supplied by customer) are used to secure the interrupter, whether mounted vertically or horizontally. The four possible mounting positions are shown in Figure 2. Prepare mounting holes and anchors and secure unit. Lifting an Interrupter Follow all approved safety practices when making hitches and lifting the equipment. Lift the load smoothly and do not allow the load to shift. This interrupter has two lifting lugs at the top of the integral frame both must be used when lifting. Maximum strength is attained with a vertical lift attached to the lugs. Use a spreader bar with a fixed attachment point for the hook at the load center. If a sling is used for lifting the interrupter (as shown in Figure 3), it must have a fixed attachment point at the load center. Rig the interrupter so that the sling height is equal to or greater than the distance between lifting lugs. Figure 3. ILifting an interrupter. Figure 2. Interrupter mounting positions. Control Mounting The electronic control cabinet can be mounted at either side of the interrupter frame, or at a remote location with up to 100 feet of cable. The cabinet is weatherproof, but it is not submersible. The length of the two cables for electrical interconnection of the interrupter and control was specified at the time of ordering. Standard five-foot long cables are supplied where the control is to be mounted to the interrupter frame. The cables, regardless of length, are permanently affixed to the interrupter. Plugs on the free ends mate with receptacles at the bottom of the control cabinet. The plugs and receptacles are keyed, eliminating the possibility of incorrect installation. Threaded collars secure the plugs in the connected position. 5
Type CI; Three-Phase Installation and Operation Instructions Figure 4. Shemtaic diagram of Type CI interrupter. 6
S275-10-1 The control cabinet is mounted through a vertical U-channel at the rear of the cabinet. Two mounting holes are provided in the channel. The upper hole is slotted to permit hanging the control on the upper bolt while the lower bolt is put in place. For mounting the control on the interrupter frame, two 5/8-11 UNC tapped holes are provided in the top crossmembers of the frame, one at each side of the unit. A right-angle bracket bolted to the frame below one of these holes contains 11/16 inch hole which aligns with the lower control mounting hole. If the control is to be mounted at the other side of the frame the lower bracket must be unbolted and relocated to that side (bracket mounting hole is provided in both sides of the frame). Two 2-1/2-inch long 5/8-11 UNC bolts and associated washers and nut are furnished for mounting the control to the frame. If the control cabinet is to be mounted away from the interrupter, refer to the DlMENSlONS section of these instructions for outline and mounting dimensions. Figure 5. Operational sequence of contacts in Type CI interrupter. 7
Type CI; Three-Phase Installation and Operation Instructions Electrical Connection Before making any electrical connections, perform the following steps: 1. Rotate springloaded manual control switch on control panel to TRIP and release. 2. Set trip-close lever at right front of mechanism tank to TRIP. GROUNDING Begin electrical connection by grounding the interrupter and control cabinet. The interrupter ground boss is located at the bottom front center of the mechanism tank. The tapped hole (1/2-13 UNC thread) will accommodate a clamp-type connector. The control cabinet is fitted with a clamp-type ground connector at the right rear corner of the bottom surface. HIGH VOLTAGE Type Cl Interrupters with a 200 amp continuous current rating are provided with 200 amp universal bushing wells molded as an integral part of the encapsulated vaccuum interrupters. They will accommodate all industry-standard loadbreak and nonloadbreak bushing plug inserts. Interrupters with a 600 amp rating are equipped with bushings molded as part of the encapsulated vacuum interrupters. Whether preparing cable terminations for a 200 amp unit or a 600 amp unit, follow the procedure recommended by the connector manufacturer. A ground boss with tapped hole (1/2-13 UNC thread) for clamp-type connectors is located on the front face of the unit for grounded neutral cable connections. Wire with adequate current carrying capacity must be used for grounding the control, consistent with application. AUXILIARY POWER Connection of 120 Vac auxiliary power is accomplished at the control. A single 120 Vac connection provides all ac power requirements for both the interrupter and the control. Make connections with power. Power leads are routed into the control cabinet through a knockout in the bottom surface. Access to the interior of the cabinet is achieved by releasing two 1/4-turn fasteners at the right side of the panel, allowing the hinged panel to swing open. A diagram of the cabinet interior showing the location of its major components is presented in Figure 6. All customer connections to the control, including 120 Vac power, are made to terminal strip T3 on the lower center portion of the rear surface, just above the knockouts. CONTROL-INTERRUPTER INTERCONNECTlON To interconnect circuitry in the interrupter and the control, insert plugs on two cables extending from interrupter through receptacles at bottom of control cabinet and handtighten plug collars. REMOTE CONTROL WIRING Remote control circuitry in the electronic trip control is a standard feature that provides the capability to trip and close from a remote location. To use this feature, the customer must supply normally-open momentary trip and close dry contacts at a remote location and must wire them to the control as shown in Figures 4 and 6. Remote switch wiring is brought in through one of the knockouts at the bottom of the cabinet and is connected to terminal strip T3. The appropriate terminals are labeled on the equipment. Figure 6. Layout of control cabinet interior with door open and panel swung out to left. 8
S275-10-1 Leak Testing Tank If the interrupter is installed in a location where it will be submerged, the tank assembly should be leak tested to ensure that all seals are fluid leak tight. CAUTION: Do not pressurize tank assembly to more than 5 psi. Pressures beyond 5 psi can cause permanent damage to the tank assembly and seals. 1. Remove plug located on cover assembly, Figure 7. 2. Attach a gas pressure source (nitrogen or clean dry air) to the pressure fitting and slowly increase the pressure to between 4 and 4-1/2 psi. 3. Apply liberal amounts of liquid soap solution to all seams, seals and junctures. Leaks will be evidenced by expanding bubbles. If any leaks are observed, corrective measures must be taken. NOTE: Pressure will escape through the control cable. As a result, the pressure source must be maintained throughout the leak testing sequence. 4. Release pressure, disconnect gas pressure source and reinstall original plug with fresh sealing tape. INTERRUPTER ACCESSORIES Frame Extension This accessory raises the Type Cl interrupter 13 inches, permitting the tank to be lowered from the mechanism without disturbing a floor-mounted installation. If a future reinstallation requires a lower floor mounting or a wall mounting, the extension frame and associated braces can be removed by simply unbolting them from the main frame. Auxiliary Switch A four-stage auxiliary switch accessory can be used to provide remote contact position indication or switching of other devices coincidentally with interrupter contact opening and closing. Each stage has two independent sets of contacts: a and b. When the interrupter contacts are open, the a contacts are also open and the b contacts are closed. The switch is located inside the mechanism tank and a 16~conductor cable is wired to its contacts. The cable, of a length specified at the time of ordering, extends from a water-tight seal at the interrupter mechanism cover. Customer connections to the switch are made at the free end of the cable. The relationship of switch terminals, switch contacts, and cable lead color coding is provided in Figure 8. Figure 8. Auxiliary switch accessory wiring. TABLE 1 Interrupter Rating of Auxiliary Switch (amps) Inductive Noninductive Inductive Noninductive Volts ac ac dc dc Figure 7. Leak testing port. 24 - - 15 20 48 - - 7.5 10 120 50 80 - - 125 - - 1.5 2 240 25 40 - - 250 - - 0.45 0.5 9
Type CI; Three-Phase Installation and Operation Instructions CONTROL ACCESSORIES DC Trip Control The dc trip control accessory is an internal wiring modification to the control that replaces standard 120 Vac tripping with tripping at either 24, 48, or 125 Vdc. The dc tripping voltage was selected at the time of ordering. All electrical tripping becomes dependent on the dc voltage with this accessory, whether initiated at the control panel manual control switch or at remote trip and close contacts. The 120 Vac source is still required to operate the interrupter motor and control cabinet heater. Customer connections to terminal strip T3 are altered as shown in Figure 9. Figure 9. Wiring of terminal strip T3 with dc trip control accessory. Figure 10. Relay control accessory. Relay Control The 24-; 48-; or 125-Vdc relay control accessory replaces the electronic trip control, sensing CTs and interrupter trip circuit with a dc trip system located within the operating mechanism cabinet. It provides an X-Y type relay scheme controlled by the customer s relay scheme. An 8-conductor cable is supplied and wired to the interrupter for customer connections for dc tripping energy, 120-Vac motor power, and trip-closecommands (Figure 10). Cable length was specified when ordered. Instantaneous Trip Accessory Sealed plug-in accessory providing instantaneous tripping at from one to 32 times minimum trip value for phase, ground, or phase and ground. The standard curve response time is 30 milliseconds, this time does not include the time required for the interrupter to trip and clear the fault. Operation of this accessory is not affected by the inrush accessory. Programming is easily accomplished with rocker dip switches on the face of the accessory. Two versions of the instantaneous trip accessory are available. The first, shown installed in Figure 11, has provisions for independent programming of both phase and ground instantaneous tripping. The second has provisions for programming phase instantaneous tripping only. On either type, programming of each parameter is accomplished with a seven-switch, rocker dip switch bank. These miniature rocker switches are actuated by depressing their raised portion with the point of a pencil or similar pointed instrument. A clear plastic protective cover fits snugly over each switch bank. Figure 11. Instantaneous trip accessory. 87861KMA 10
S275-10-1 To install the accessory, plug the device into the top accessory socket, at the right side of the control panel. Markings on the face of the accessory above each switch identify six multiplier settings and an on-off switch (Figure 12). A multiplier is in the circuit when the black bar at the top of the switch, next to the marking, is displayed. The accessory is electrically removed from the circuit when the black bar on the on-off switch is displayed next to OFF. The parameter controlled by each switch bank, phase or ground, is identified to its right. Figure 12. Typical instantaneous trip accessory switch bank. Figure 13. Instantaneous trip accessory programming examples. Note in Figure 12 that there are two 1X switches, one of which is locked in the multiplier in position. This assures that the device can never be set lower than 1X, or that one times the minimum trip resistance will always be in the circuit. To obtain instantaneous tripping at some desired multiple of the basic minimum trip value, set the multiplier switches so that their sum (including the locked 1X switch) is equal to that multiple. The switch bank in Figure 12 is programmed for one times minimum trip. Several additional programming examples are presented in Figure 13. To disable the accessory, simply set the on-off switch to OFF, returning control of minimum trip level to the encapsulated minimum trip resistor. The accessory can be left plugged into the panel with its multiplier setting left for future use, or it can be removed for use on another Type Cl interrupter installation. Target Accessory Sealed plug-in accessory provides ground, phase or instantaneous indication to identify which function or functions are above their pickup level when fault tripping occurs. Orange targets, 5/16-inches in diameter, provide indication. The device resets automatically when a minimum of ten amps of load current reappears. To install the target accessory, plug the device into the center accessory socket, at the right side of the control panel. It is shown installed in Figure 14. No settings or adjustments are required, and there is no on-off switch. The accessory is operational whenever it is plugged into the panel. Figure 14. Target accessory. 87860KMA 11
Type CI; Three-Phase Installation and Operation Instructions Inrush Restraint Accessory Sealed plug-in accessory that upon application of line power: 1) disables, or raises by a programmable amount, ground tripping for a programmable time, and 2) raises the phase minimum trip value by a programmable amount for a programmable time to prevent unnecessary tripping due to inrush current. Three versions of the inrush restraint accessory are available, refer to Table 2. TABLE 2 Programming Choices for Inrush Restraint Accessory Accessory Multiplier of Time to Normal Number Initial Min. Trip Initial Min. Trip* KCF52EC Multipliers of one 1/2 second through Phase and Ground through 8-1/2 in 7-7/8 secs. in increments of 1/2 increments of 1/2 sec. KCF52EB Operation disabled 1/2 second through Ground only 31-1/2 secs. in increments of 1/8 sec. KCF52EA Multipliers of one 1/8 second through Phase through 32 in 7-7/8 secs. in increments of one increments of 1/8 sec. Ground Operation 1/2 second through disabled 31-1/2 secs. in increments of 1/2 sec- *A limitation exists on the time selections. See Appendix. The KCF52EA and the KCF52EB accessories will, when line current is first sensed, disable ground tripping for a programmed period of time, 0.5 to 31.5 seconds, in 0.5 second increments. The KCF52EA accessory raises the phase minimum trip current level, when current is first sensed, by a programmed amount, for a programmed time. The trip level is then linearly returned to normal. The initial phase minimum trip level can be raised by a multiple of from 1X to 32X of the original level, in increments of 1X. The rest time can be programmed from 1/8 to 7-7/8 seconds, in 1/8 second increments. Additional application information is available in the Type Cl Interrupter Electrical Apparatus section, 275-10. The KCF52EC accessory raises both ground and phase minimum trip levels by a programmed amount, for a programmed time, when line current is first sensed. The trip levels return linearly to their normal level. Both initial minimum trip levels can be raised individually, by a multiple of from 1 to 8.5 of the normal level, in 0.5 increments. Unique reset times, for both phase and ground, can be programmed from 1/8 to 7-7/8 seconds, in 1/8 second increments. To install the accessory, plug the device into the bottom accessory socket, at the right side of the control panel. If the accessory is of the phase and ground type (KCF52EA), its face will appear as shown in Figure 15. If it is of the ground-only-type, only the switch at the right, labeled GD (ground disable), will be present on the face of the accessory. In the programming directions that follow, both phase and ground programming are described. If a ground-only accessory is present, disregard instructions pertaining to phase programming. On all three switch banks, a multiplier of time is in the circuit when the black bar at the right of the switch, next to the marking, is displayed. Note in Figure 16 that there are two 1 X switches on the phase multiplier bank at the left, one of which is locked in the multiplier on position. This assures that the phase multiplier can never be set lower than 1 X, or that one times the minimum trip resistance will always be in the circuit. To prevent unnecessary tripping on phase due to inrush currents, raise the minimum value for an initial time period as follows. Set the multiplier switches (PM) so that their sum (including the locked 1 X switch) is equal to the desired multiple of the basic minimum trip value. Set the phase time switches (PT) so that their sum is equal to the time in seconds following initial application of power that you desire the raised minimum trip valueto be in effect. Refer to the programming examples following for additional information. 12 Figure 15. Inrush restraint accessory (KCF52EA). Figure 16. Typical inrush restraint accessory switch banks. 87859KMA
S275-10-1 The programming panel for this accessory is shown in Figure 17. Notice that on both the phase and the ground multiplier switch banks there are two 1 switches, the lower one on each bank is permanently locked in the ON position. This assures that the multiplier is never less than one. will be in effect for approximately 0.0125 second. Refer to the programming examples following for additional information. EXAMPLES The following two examples depict the programming of a KCF52EA accessory. Programming of the KCF52EC accessory would be essentially the same. To prevent unnecessary tripping on ground, set the ground disable switches (GD) so that their sum is equal to the time in seconds following initial application of power that you wish to disable ground tripping. See the programming examples in Figure 19. To disable the phase portion of the accessory, set all phase time switches (PT) out of the circuit. Likewise, to disable the ground portion of the accessory, set all ground disable switches (GD) out of the circuit. The switches shown in Figure 16 are set to disable both the phase and ground portions of the accessory. Figure 17. Inrush restraint accessory (KCF52EC). To prevent unnecessary tripping due to inrush currents, raise the minimum trip value for both phase and ground as follows. See Figure 18, set the multiplier switches (PM and GM) so their sum (including the locked 1 switch) is equal to the desired multiple of the basic minimum trip value. Set the time switches (PT and GT) so that their sum is equal to the time, in seconds, following initial application of power, that you desired the raised minimum trip value to be in effect. If no time switches are actuated the raised inrush restraint level (as set on the applicable multiplier switches) Figure 18. Typical inrush restraint accessory switch banks. Figure 19. Inrush restraint accessory programming examples. 13
Type CI; Three-Phase Installation and Operation Instructions OPERATING PROCEDURES The interrupter should not be operated or placed into service until there is a full understanding of its operating procedures. Mechanism and control levers and indicators referred to in this section are identified in Figures 20 and 21. Figure 20. Front CI interrupter mechanism tank. 87857KMA Figure 21. Panel of electronic trip control used with Type CI interrupter. 87858KMA 14
S275-10-1 Mechanical Operation Check A simple nonelectric test of interrupter operation will assure that the operator mechanism and the interrupter linkage are functioning properly. The following procedure may be used. 1. Remove control fuse from 120 Vac fuse block in cabinet interior to isolate mechanism from electrical system. 2. Check that the interrupter is open. The Contact-Position Indicator visible from the front of the mechanism tank should read OPEN. NOTE: If interrupter is closed, move the Trip-Reset lever at the front of the mechanism tank to TRIP. This will release a latch in the mechanism and open the interrupter contacts. The Contact- Position Indicator will then read OPEN. 3. Using the manual closing procedure described in Manual Closing section, close the interrupter. The Contact-Position Indicator should read CLOSED. 4. Move the Trip-Reset lever to TRIP. The interrupter contacts should open and the Contact-Position Indicator should read OPEN. Successful completion of the above four steps confirm proper operation of the interrupter operating mechanism. Electrical Operation Check The following procedure may be used to check the electrical operation of the interrupter. 1. Make sure that the Trip-Reset lever on the mechanism tank is set on RESET. 2. Apply 120 Vac power. Upon application of power, the springcharging motor will run to charge the closing springs. 3. To close the interrupter, move Manual Control switch on control panel to CLOSE. The interrupter should close immediately. The red indicator lamp on the control panel should light and the Contact-Position Indicator at the front of the mechanism tank should read CLOSED. 4. To open the interrupter, move the Manual Control switch to TRIP. The interrupter should open.the green indicator lamp on the control panel should light and the Contact-Position Indicator in the mechanism tank should read OPEN. Manual Closing Manual deenergized closing into an energized line, without the 120 Vac supply, can be accomplished with the Push-Pull lever at the left front of the mechanism tank (Figure 18). 1. If the electronic control is connected, make sure the manual control switch on the control panel has been moved to the TRIP position and released. 2. Move Trip-Reset lever, on right front of mechanism tank, to either the TRIP or RESET position. 3. Pull Push-Pull lever approximately 30 times,or until the operating spring indicator reads SPRING CHARGED. 4. Move Trip-Reset lever to CLOSE. Interrupter contacts will close and handle will spring back to the RESET position. Manual Tripping A closed interrupter can be manually tripped at the operator mechanism by moving the Trip-Reset lever at the front of the tank to TRIP. This will release a trip latch in the operating mechanism, allowing the charged opening springs to drive the contacts to their open position. The interrupter cannot be closed while the Trip-Reset lever is in the TRIP position. IN-SERVICE OPERATION Initial Operation To place the interrupter in operation, proceed as follows: 1. Make sure that the control cables extending from the interrupter are connected to the control and the 120 Vac power is supplied to the control. 2. Make sure that the Trip-Reset lever at the front of the interrupter mechanism tank is in the RESET position. 3. Move the Manual Control switch on the electronic control panel to CLOSE. The interrupter will close. The red indicator lamp on the control panel will light and the indicator flag in the mechanism will read CLOSED. Automatic Operation Once the unit is closed and in service, the electronic control will automatically trip the interrupter in accordance with the programmed operating characteristics when a phase or ground fault occurs. While closed, the red indicator lamp on the control panel will provide a continuous indication of closed contacts. The indicator flag, visible through a viewing port at the front of the mechanism tank, will display CLOSED. To open the interrupter while it is in service, move the manual control switch to TRIP. The interrupter will immediately open. Whether tripped automatically or manually, the green indicator lamp on the panel and the OPEN position of the mechanism flag will indicate open contacts. If the remote control operating feature is being used, operations initiated by the remote trip and close dry contacts will be identical to those initiated with the Manual Control switch. Indicator lamp and Contact-Position Indicator displays will also be the same. REMOVINC CONTROL FROM SERVICE The Electronic Trip Control can be removed from an in-service interrupter without interrupting service. However, the interrupter will remain closed, with no fault tripping capability, during the time that the control is removed. Remove the control from an inservice interrupter as follows: 1. Remove plug-in cables from control. 2. Deenergize 120 Vac supply and disconnect lead wires from terminal strip T3 inside control cabinet. 3. If remote control wiring is connected to T3, remove lead wires. 4. Remove cabinet ground wire and mounting bolts. Remove control. To return control to service remount cabinet, reconnect wiring removed earlier, reconnect plug-in cables, and apply 120 Vac power. Fault tripping capability is now restored in the interrupter. 15
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