S&C PureWave UPS System Outdoor Distribution (2.5 to 20 MVA, 5 to 25 kv)

Transcription

1 S&C PureWave UPS System Outdoor Distribution (2.5 to 20 MVA, 5 to 25 kv) Detailed Functional Specification Guide 1.0 GENERAL 1.1 The system shall conform to the following specification. The modular off-line uninterruptible power supply (UPS) system shall be available in capacities from 2.5 MVA to 20 MVA, at 5 kv to 25 kv, three phase, 50 Hz or 60 Hz. It shall operate in parallel with the utility source to provide assured continuity of service to a critical load requiring uninterruptible operation. In the event of an out-of-tolerance utility voltage condition (sag/swell) or loss of voltage, the system shall maintain uninterrupted ac power to the critical load within specified limits. The system shall, optionally, be capable of transferring the critical load to an alternate power source, such as a diesel generator, if the utility source is lost for a time period exceeding the stored energy capacity of the system. The system shall be completely self-contained, suitable for outdoor installation, and shall be capable of unattended operation. 2.0 CODES AND STANDARDS 2.1 Equipment furnished shall meet the guidelines defined in the applicable standards listed below. In instances where conflicts exist between these standards, this specification shall prevail National Electrical Code IEEE 587 (ANSI/IEEE C62.41), IEEE Recommended Practice on Surge Voltages in AC Power Circuits IEEE , IEEE Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems ANSI Z , Product Safety Signs and Labels OSHA safety standards for electrical equipment and service of electrical equipment FCC, Part 15, Subpart B, Sections and ANSI/IEEE C , IEEE Standard for Metal-Enclosed Interrupter Switchgear /31/EEC Electromagnetic Compatibility UL 508 Industrial Control Equipment, Resistance to Impact, Sections 34.32, 34.33, and UL 1778 UPS, Uninterruptible Power Supply Equipment (applicable to lowvoltage UPS inverter portion of the system) April 27, 2009 S&C Electric Company Information Sheet

2 3.0 ENVIRONMENTAL CONDITIONS The system shall be designed for use in the following outdoor environment. 3.1 Operating Ambient Temperature 30 F to +104 F ( 35 C to +40 C) 3.2 Humidity 0 to 100% including rain and snow 3.3 Transportation and Storage Ambient Temperature 30 F to +122 F ( 35 C to +50 C) for a period not to exceed 2 months 3.4 Altitude Sea level to 3,280 feet (1,000 meters) without derating or modification 3.5 Audible Noise UPS ready state, specified in Section 5.2.1: 55 db(a) at 20 feet (6 meters) UPS run state, specified in Section 5.2.2: 72 db(a) at 20 feet (6 meters). 4.0 SYSTEM EQUIPMENT DESCRIPTION 4.1 MAJOR SYSTEM COMPONENTS System Enclosure The system enclosure shall house the battery assemblies, power electronics, and controls. For systems requiring multiple containers to meet the system capacity rating, one container shall be designated the lead container and shall contain all system-level control electronics. The system enclosure shall be suitable for outdoor pad-mounted installation and shall be fitted with a heating, ventilating, and air-conditioning system designed to provide the proper environment for the system components. The system enclosure shall house the isolation transformer in applications up to 15 kv. Power cables entering the system enclosure shall be connected using medium-voltage loadbreak elbows to permit electrical disconnection of the system enclosure from service. Customer field wiring shall be limited to input and output power wiring and remote communications/control connections Power-Electronic Switch (PES) The PES shall consist of an assembly comprised of pairs of medium-voltage silicon-controlled rectifiers (SCRs) arranged in back-to-back modules. The number of modules and their current-carrying capacity shall be determined based on the system rating and operating voltage as defined in Section 6.1. PES shall be capable of disconnecting the critical load from the utility source, and transferring the load to the standby power source in approximately Z\v cycle 2 S&C Information Sheet

3 when there is a utility source disturbance. Each phase of the PES shall be capable of detecting an open SCR. If an open SCR is detected, the system control shall initiate the bypass isolate state, as specified in Section 5.2.5, and send an alarm to the alarm module. All line-to-ground insulation shall be of a cycloaliphatic epoxy resin system. The PES shall be housed in the system switchgear specified in Section and shall be forced air cooled with redundant blower assemblies System Switchgear In addition to the PES specified in Section 4.1.2, the system switchgear shall include three circuit breakers or power-operated switches, electrically bussed in a configuration to allow utility power to flow directly to the critical load when the PES and/or balance of system are out of service. The input breaker or switch shall protect the PES when the system is in the UPS ready state or UPS run state, as specified in Sections and 5.2.2, respectively. The bypass breaker or switch shall be rated to carry full current of the critical load when the system is in the bypass isolate state, as specified in Section The output breaker or switch shall serve as a disconnect device to permit maintenance of the system when the critical load is served from the bypass breaker or switch. Bypass operation shall be automatic and without interruption of service to the critical load under normal operation or major system alarm conditions. The system switchgear shall also include manually operated switches for disconnecting the feeder(s) to the inverter module(s). Each bay shall be configured permit connection of up to two system containers. The number of bays shall be determined by the system rating, including projected system expansion. The system switchgear shall further include input and output bays as required for the application Inverter Module(s) Each inverter module shall consist of an insulated-gate bipolar transistor (IGBT) inverter bridge and an IGBT battery charger. The inverter module shall be selfcontained, permitting connection and disconnection from the system without special tools and without contact with energized parts. The inverter module shall be rated 313 kva/250 kw and paralleled to meet the system rating. The dc bus capacitors shall be charged and discharged without exposing personnel to energized parts. The inverter module shall be capable of being serviced without special lifting arrangements Battery Module(s) Each battery module shall be factory-assembled prior to shipment, eliminating the need for handling individual batteries during installation. The battery module shall be rated 250 kw and paralleled to meet the system rating. The battery module shall be self-contained, with all power and control connections of an insulated quick disconnect design to facilitate battery replacement without S&C Information Sheet

4 special tools or contact with live parts. Individual battery modules shall be capable of being replaced without taking the system off-line. Hydrogen gas generated during charging shall be vented in the manner specified in Section Batteries The batteries used in the battery module(s) shall be as specified in Section Isolation Transformer The isolation transformer shall be a dry-type, three-phase coil and core design with a duty cycle rating as specified in Section 6.4. This transformer shall provide the appropriate voltage and configuration to safely connect to the utility source System Control The system control shall be the microprocessor-based section of the lead system container that controls system operation and provides a local/remote interface to the system monitor and operator controls System Monitor The system monitor shall be the microprocessor-based section of the lead system container that provides continuous monitoring of system parameters Alarm Module The alarm module shall be the independent controller section of the lead system container that provides continuous monitoring of system alarms and remote reporting of system alarm conditions. It shall be supplied with a battery back-up system independent of the system batteries. 5.0 SYSTEM OPERATION 5.1 FUNCTIONAL OVERVIEW The off-line UPS system shall protect the critical load from utility voltage disturbances and outages. The system control shall continuously monitor the utility source voltage and frequency and determine if they are within limits specified in Section 5.3. If these parameters are within their specified limits, the utility source shall power the critical load through the PES in the UPS ready state, as specified in Section The inverter module(s) shall be electrically energized but not supplying any portion of the critical load current, and the battery module(s) shall be at rest with no power demand. 5.2 SYSTEM OPERATING STATES UPS Ready State The UPS ready state shall be considered the normal mode of operation. The critical load shall be supplied by the utility source through the PES, with the inverter module(s) and system control ready to operate in the event of a utility source disturbance. The input and output breakers shall be closed and the bypass breaker shall be open. 4 S&C Information Sheet

5 5.2.2 UPS Run State The UPS run state shall be initiated from the UPS ready state when utility source voltage or frequency exceeds the limit specified in Section 5.3. The critical load shall be supplied by the batteries, through the inverter module(s). The input and output breakers or switches shall be closed and the bypass breaker or switch shall be open Standby Inhibit State In the standby inhibit state, the critical load shall be supplied by the utility source through the PES, with the UPS inhibited from running. The input and output breakers or switches shall be closed and the bypass breaker or switch shall be open Mechanical Bypass State In the mechanical bypass state, the critical load shall be supplied by the utility source through the closed bypass breaker or switch. The input and output breakers or switches shall also be closed Bypass Isolate State The bypass isolate state shall be initiated when the UPS is to be serviced. The critical load shall be supplied by the utility source through the closed bypass breaker or switch. The input and output breakers or switches shall be open Test in Bypass State The test in bypass state shall be used during startup of the UPS or during service. It shall permit the UPS to run with the critical load supplied by the utility source through the closed bypass breaker or switch. The input and output breakers or switches shall be open. 5.3 UTILITY DISTURBANCE MONITORING The utility disturbance monitor (UDM) shall be capable of sampling each phase of the utility source a minimum of 80 times per cycle to determine its true RMS value regardless of harmonic content, thus ensuring rapid detection of a utility source voltage or frequency disturbance that could affect the critical load. The voltage and frequency thresholds shall be factory-selectable to meet specific customer requirements. Normal threshold setting for voltage deviation shall be ±10%. Normal threshold setting for frequency deviation shall be +1.0/ 1.5 Hz for three cycles. 5.4 POWER-ELECTRONIC SWITCH OPERATION In the UPS ready state, the PES shall be gated closed by the system control and be capable of carrying 100% of rated load on a continuous basis. Upon detection of utility source voltage or frequency exceeding the limit specified in Section 5.3, the PES shall disconnect the critical load from the utility source to prevent backfeed of UPS power to the utility source. Upon return of the utility source to the specified limits, the system shall resynchronize with the utility source and reclose the PES, returning the system to the UPS ready state. S&C Information Sheet

6 5.5 INVERTER MODULE OPERATION Simultaneous with an open signal to the PES described above, the system control shall send a run signal to the inverter module(s) to power the critical load. Each inverter module shall be capable of providing 100% of rated output at rated voltage within 2 ms of activation to ensure power to the critical load as the PES is gated off. The inverter modules shall share the load evenly within ±10%. 6.0 SYSTEM OUTPUT ELECTRICAL CHARACTERISTICS The system shall be capable of maintaining the following electrical characteristics when serving the critical load in the UPS run state. 6.1 SYSTEM RATING The modular design of the system shall allow it to be tailored from 2.5 MVA up to 20 MVA, depending on voltage. The three-phase system shall be furnished with the following ratings (select from the table below): Voltage, kv Current, RMS Nom. BIL System Rating Range, MVA (MW) Cont. Short-Circuit, ka Max. No. of 2.5-MVA (2-MW) System Containers to 8.6 (2.0 to 7.0) to 33.0 for 4 cycles to 20.0 (2.0 to 16.0) to 33.0 for 4 cycles to 20.0 (2.0 to 16.0) to 33.0 for 4 cycles SYSTEM OUTPUT PARAMETERS Voltage Regulation In the UPS run state, voltage regulation shall be ±1.0% for balanced loads Voltage Adjustment In the UPS run state, the system shall match the pre-disturbance voltage if this voltage was 95% to 105% of nominal. If the pre-disturbance voltage was less than 95% of nominal, the system shall run at 95% of nominal. If the pre-disturbance voltage was greater than 105% of nominal, the system shall run at 105% of nominal Phase Angle In the UPS run state, the phase angle of the output shall be 120 ±1 between each phase for balanced and unbalanced loads Voltage Regulation for Step Loads In the UPS run state, voltage shall recover to within 8% of the steady-state value within 4 ms for a 75% step load. The voltage shall recover to within 1% of the steady-state value within 100 ms. 6 S&C Information Sheet

7 6.2.5 Harmonics In the UPS run state, the voltage shall have 3% total harmonic distortion (THD) maximum for linear load and less than 5% THD for non-linear load, with current distortion up to 30% Reconnect Inrush Current There shall be no inrush current demand upon reconnection to the utility source after operating in the UPS run state Overload Capability In the UPS ready state, the system shall be capable of operating at 115% of rated continuous current for a maximum of 45 seconds. In the UPS run state, the system shall be capable of operating at 137% of rated continuous current and maintaining nominal voltage during short-term infrequent and transient conditions. If load current exceeds 137% of rated continuous current, the UPS shall continue to supply the load current until the voltage drops to a level at which the UPS controls can no longer operate. The UPS shall then initiate the bypass isolate state. 6.3 SYSTEM OPERATING EFFICIENCY System efficiency in the UPS ready state at maximum rated output shall be 98.5% or greater, including all control-power and heating, ventilating, and air-conditioning losses. 6.4 SYSTEM DUTY CYCLE The inverter modules shall be capable of providing rated output power to the critical load for up to 60 seconds. Each inverter module shall be capable of providing 15 megajoules of run time in a 60-minute period. The maximum run time in the UPS run state is 60 seconds for full loads and 180 seconds for partial loads. 7.0 SYSTEM CONTROL AND MONITORING 7.1 SYSTEM CONTROL DESCRIPTION The system control shall be designed for unattended operation under normal conditions. All information necessary to determine operating status or to manually control the system shall be accessible to the operator without the need for peripheral equipment. The system control shall have built-in voltage transient and overcurrent protection. In the UPS ready state, malfunction of the system control shall initiate the bypass isolate state, as specified in Section 5.2.5, and send an alarm to the alarm module. 7.2 MANUAL CONTROLS Manual controls shall be limited to the following: a) Operation enabled/disabled door switch b) Reset push button c) Operation enabled/disabled over-ride switch. S&C Information Sheet

8 7.3 SYSTEM MONITORING Overall system status shall be monitored and displayed on a 20-character, two-line, backlit liquid-crystal display located within the system enclosure. If the optional monitoring computer specified in Section is furnished, overall system status and detailed information may also be remotely monitored via a modem or Ethernet connection System Status (a) The following system status information shall be displayed locally on the liquid-crystal display, as well as remotely if the optional monitoring computer has been specified: (1) System operating state (2) Inverter module status. An indicator shall be furnished for each inverter module. (b) The following detailed information shall be available if the optional monitoring computer has been specified: (1) Power outage data (date, time, and duration) (2) Utility source line-to-line voltage (3) Three-phase load current (4) Load line-to-line voltage (5) Load (kva and kw) (6) Load power factor System Status Log If the optional monitoring computer has been specified, it shall identify, time stamp, and log changes in system operating state and create a history file that includes: (a) UPS run operations, including duration (b) Equalize charging operations (c) Inverter module faults. The log shall include, as a minimum, the last 100 events System Alarm Indicators The following system warning alarm indicators shall be displayed locally on the liquid-crystal display: (a) Warning Alarms (1) Container overtemperature (2) Container undertemperature (3) Broken thermocouple (4) PES overtemperature 8 S&C Information Sheet

9 (5) Hydrogen sensor (6) Utility overvoltage (7) Utility undervoltage (8) Utility overfrequency (9) Utility underfrequency (10) Test in bypass requests (11) Circuit breaker overcurrent (12) Module fault (13) Input circuit breaker/switch (14) Output circuit breaker/switch (15) Parallel board communication error (16) Time not set (17) Transformer overtemperature. (b) Inhibit Alarms (1) Lost synchronization with utility (2) Load overcurrent (3) Load overpower (4) Battery discharged (5) Reverse phase rotation. (c) Mechanical Bypass Alarms (1) Power-electronic switch overtemperature (2) Bypass circuit breaker/switch (3) UPS output fault. (d) Bypass Isolate Alarms (1) Remote isolate (2) Operation disabled (3) Smoke in container (4) Fire hot temperature (5) DC capacitor bank. (e) Automatic Reset Bypass Alarms (1) Shorted PES (2) Open PES. If the system transfers to the bypass isolate state due to an alarm condition, the system control shall attempt to clear the alarm automatically and return to the UPS ready state. S&C Information Sheet

10 7.3.4 System Status Contacts The following solid-state contacts shall be available for monitoring and alarm reporting: (a) System warning alarm (b) System non-warning alarm. 7.4 REMOTE ALARM REPORTING The alarm module specified in Section shall provide remote reporting of system alarm conditions. 7.5 REMOTE STATUS CONTACTS The following Form C dry contacts shall be available for monitoring and alarm reporting: (a) UPS is running (b) Low battery warning (c) Load overcurrent. 8.0 ENERGY STORAGE SYSTEM 8.1 SYSTEM FUNCTIONAL DESCRIPTION The energy storage system shall be based on a modular design using lead-acid batteries in the quantity required to achieve the system-rated power level. The batteries shall be factory-assembled and tested. Each battery module shall be capable of serving 313 kva/250 kw of load at 480 volts for 60 seconds, during the warranty period specified in Section HEATING, VENTILATING, AND AIR-CONDITIONING SYSTEM To ensure proper performance and maximize battery life, the system enclosure shall be equipped with a self-contained heating, ventilating, and air-conditioning system capable of maintaining an internal temperature of +57 F to +97 F (+14 C to +36 C) throughout the operating ambient temperature range specified in Section 3.1. Air circulation shall be sufficient to maintain uniform temperature throughout the battery module(s). The system shall be designed for continuous operation at rated load with all components operating within their temperature ratings. Temperature sensors shall be provided to monitor the operating temperature within the system enclosure. Air conditioners and heaters shall be integrated into the system enclosure to eliminate the need for an environmentally controlled room or building to house the UPS. 8.3 BATTERY DESCRIPTION The battery module(s) shall include Group 31, heavy-duty automotive-type floodedcell batteries, rated 12 volts, with a 75-ampere-hour rating at 25-ampere discharge rate. Battery terminal posts shall be provided with stainless-steel inserts to eliminate external lead-to-lead connections. All wiring between batteries shall be made with stainlesssteel hardware to eliminate the need for periodic maintenance under normal use. Each battery assembly shall be designed for a minimum of five years of service without maintenance when operated within the system megajoule warranty rating specified in Section S&C Information Sheet

11 8.4 BATTERY MONITORING The system shall monitor the status of the battery string in each battery module and, after each operation in the UPS run state, shall record the running time and megajoules used from each container, as well as the end-of-discharge voltage of the battery module having the lowest voltage in the container. Based upon this record of performance over time, the overall condition of each battery string can be analyzed periodically, along with the total megajoules used, to determine the recommended battery replacement date. 8.5 BATTERY CHARGING Each inverter module shall be furnished with a nominal 4-kW IGBT battery charger capable of charging the battery string after each discharge or during equalize charging. After each UPS run, the charger shall restore the battery string at a rate of two minutes for each second of full power discharge. The battery charger shall be temperature compensated by 1.6 volts per 1 C to minimize generation of hydrogen and loss of electrolyte. 8.6 EQUALIZE CHARGING The system control shall perform a periodic equalize charge of each battery string to ensure all battery cells are at equal capacity and to destratify the acid in the batteries. The equalize charge shall occur every two months. During equalization, the battery charger in each power module shall elevate the voltage of the battery string to 770 volts for 4 hours. 8.7 HYDROGEN GAS VENTING The batteries in each power module shall be individually connected to a hydrogen gas venting system exhausting to the exterior of the system enclosure. An exhaust blower in the vent manifold shall ensure positive pressure in the manifold during charging of the battery strings. Should the exhaust blower malfunction during charging, the system control shall stop charging and indicate an alarm. 9.0 SYSTEM MODULARITY AND EXPANDABILITY 9.1 SYSTEM MODULARITY For systems furnished with more than one inverter module and battery module, the system control shall continuously monitor the load to determine if a sufficient number of inverter modules are available to serve the critical load. When the load demand permits N + 1 operation, the system control shall allow one power module to be taken out of service while maintaining the system in the UPS ready state. 9.2 SYSTEM EXPANDABILITY Systems with two or more inverter modules may be furnished with a capacity below the maximum system rating specified in Section 6.1 by installing less than the maximum number of module cabinets. The overall system capacity shall then be expandable through the addition of inverter modules and battery modules. S&C Information Sheet

12 10.0 OPTIONAL FEATURES 10.1 GENERAL The following optional features shall be furnished (specify as required): Remote Status Contacts The following solid-state contacts, rated 120 volts ac, 1.25 amperes, shall be furnished for use with user-furnished indicators: UPS running contact, lowbattery warning contact (indicates when energy remaining in the system is below a preset megajoule level), and load overcurrent contact Smoke Detectors Six smoke detectors shall be furnished in the system enclosure, each with a non-latching Form C contact, rated 240 volts ac, 2.5 amperes, that provides indication the detector has activated. Activation of one smoke detector shall cause a smoke warning. Activation of two smoke detectors in any of three zones shall cause a smoke alarm Remote System Disable A 120-volt ac control coil shall be supplied for remotely disabling the UPS. Activation of the coil will place the UPS into the bypass isolate state. A solid-state contact, rated 120 volts ac, 1.25 amperes, shall be furnished to indicate that the system is remotely disabled Generator Interface A back-up generator interface feature shall be furnished, providing seamless transfer of the load from the utility source to a back-up generator. Operation of the system in this configuration shall be as described in Section Monitoring Computer A monitoring computer shall be supplied to provide overall system status and maintain a system status log described in Section 7.3. The monitoring computer shall be accessible via a modem or Ethernet connection Battery Module Rollers Rollers shall be provided to permit the battery module(s) to be rolled out of the system enclosure. This option shall reduce the space required in front of the enclosure for battery removal and installation SYSTEM TESTING 11.1 FACTORY TESTING Inverter Module Testing The following testing procedures shall be conducted on each inverter module prior to shipment: (a) Printed circuit board and subassembly functionality (b) Mechanical inspection 12 S&C Information Sheet

13 (c) Wiring continuity (d) DC insulation resistance (e) Safety and alarm circuit verification (f) Battery charger functionality (g) Full-power Battery Module Testing The following testing procedures shall be conducted on each battery module prior to shipment: (a) Full discharge test at 25 amperes (b) End-of-discharge voltage matching (c) Ampere-hour capacity test Container Level Testing The following testing procedures shall be conducted on each container prior to shipment: (a) Printed circuit board and subassembly functionality (b) Mechanical inspection (c) Wiring continuity (d) DC insulation resistance (e) Safety and alarm circuit verification (f) Manual/automatic control circuit verification (g) Heating, ventilating, and air-conditioning system verification (h) Full-power System Level Testing The following testing procedures shall be conducted on the entire system prior to shipment: (a) Printed circuit board and subassembly functionality (b) Mechanical inspection (c) Wiring continuity (d) DC insulation resistance (e) Safety and alarm circuit verification (f) Manual/automatic control circuit verification (g) Heating, ventilating, and air-conditioning system verification (h) System performance during power outages at rated load S&C Information Sheet

14 (i) System monitor functionality (j) Alarm module functionality ON-SITE INSPECTION AND TESTING On-site Inspection The following inspections shall be performed by a factory service specialist prior to placing the system in service: (a) Shipping and installation damage (b) Installation per manufacturer s drawings (c) Control wiring connection (d) Power wiring connection (e) Phase rotation (f) Safety shutdown functionality On-site Testing The following testing procedures shall be performed by a factory service specialist prior to placing the system in service: (a) Manual start-up (b) Safety and alarm circuit verification (c) Safety shutdown functionality (d) Heating, ventilating, and air-conditioning system verification (e) Automatic operation under actual load verification (f) Alarm module functionality SYSTEM CONSTRUCTION 12.1 MATERIALS All components and hardware shall conform to electrical and mechanical industry standards as defined herein. All components shall be designed to operate at rated duty cycle under the environmental conditions defined in Section SYSTEM ENCLOSURE CONSTRUCTION The system shall be designed for outdoor installation in accordance with the following requirements: Base Frame The base frame shall be a continuous welded steel structure and support all four sides of the system enclosure. 14 S&C Information Sheet

15 Corrosion Resistance All hardware and other parts subject to abrasive action from mechanical motion shall be of nonferrous materials, stainless steel, or galvanized or zinc-nickelplated steel Enclosure and Base Finish (a) The enclosure and base finish shall conform to or exceed the applicable requirements of ANSI C The standard color shall be ANSI 70 Gray. (b) During fabrication, the areas of structural parts which may later become inaccessible, such as folded edges and overlapping members, shall be given an iron-oxide zinc-chromate anticorrosion primer to ensure that all surfaces are protected. (c) Full coverage at joints and blind areas shall be achieved by processing enclosures independently of components such as doors and roofs before assembly into unitized structures. (d) To remove oils and dirt, to form a chemically and anodically neutral conversion coating to improve the finish-to-metal bond, and to retard underfilm propagation of corrosion, all surfaces shall undergo a thorough pretreatment process comprised of a fully automated system of cleaning, rinsing, phosphatizing, sealing, drying, and cooling before any protective coatings are applied. By utilizing an automated pretreatment process, the enclosure will receive a highly consistent thorough treatment, eliminating fluctuations in reaction time, reaction temperature, and chemical concentrations. (e) After pretreatment, protective coatings shall be applied that help resist corrosion and protect the steel enclosure. To establish the capability to resist corrosion and protect the enclosure, representative test specimens coated by the enclosure manufacturer s finishing system shall satisfactorily pass the following tests: (i) 4000 hours of exposure to salt-spray testing per ASTM B 117 with underfilm corrosion not to extend more than 1/32 from the scribe as evaluated per ASTM D 1654, Procedure A, Method 2 (scraping); and loss of adhesion from bare metal not to extend more than 1/8 from the scribe. (ii) 1000 hours of humidity testing per ASTM D 4585 with no blistering as evaluated per ASTM D 714. (iii) 500 hours of ultraviolet accelerated weathering testing per ASTM G 53 using lamp UVB-313 with no chalking as evaluated per ASTM D 659, and no more than a 10% reduction of paint gloss as evaluated per ASTM D 523. (iv) Crosshatch adhesion testing per ASTM D 3359 Method B with no loss of paint. S&C Information Sheet

16 (v) 160-inch-pound impact adhesion testing per ASTM D 2794 with no paint chipping or cracking. (vi) Oil resistance testing consisting of a 72-hour immersion bath in mineral oil with no shift in color, no streaking, no blistering, and no loss of hardness. (vii) 3000 cycles of abrasion testing per ASTM 4060 with no penetration to the substrate. Certified test abstracts substantiating the above capabilities shall be furnished upon request ACID CONTAINMENT The system enclosure shall be designed to contain any electrolyte released by the rupture of one or more battery assemblies METAL-ENCLOSED SWITCHGEAR The system switchgear shall conform to the specifications of S&C Electric Company s Information Sheet , Custom Metal-Enclosed Switchgear: Detailed Functional Specification Guide DOCUMENTATION 13.1 SUBMITTALS The manufacturer shall provide the following documentation for installing and operating the system: System Specification System Electrical Connection Drawings Dimensional Drawings showing equipment dimensions, weight, and conduit entrance locations Installation Instructions Operation and Maintenance Manual, including functional description of the system, safety instructions, step-by-step operating procedures, and maintenance guidelines WARRANTY 14.1 EQUIPMENT WARRANTY The manufacturer shall warrant the system against defects in workmanship and material for 24 months after start-up of the system, or 30 months after the date of shipment, whichever occurs first. 16 S&C Information Sheet

17 14.2 BATTERY PERFORMANCE WARRANTY The manufacturer shall warrant that the batteries in each battery module will perform within their rating for either of the following: (a) 60 months after startup of the system or 66 months after the date of shipment, provided that, during any storage periods, battery charge is maintained in accordance with the operation and maintenance manual requirements, or (b) A total discharge from each battery module of 625 megajoules, whichever occurs first. The system data log shall be the record for the energy used during each run on battery power and shall be the basis for determining battery warranty status based on energy consumption OPERATION IN CONJUNCTION WITH A BACKUP GENERATOR (include if the backup generator interface option has been specified; see Section ) SYSTEM DESCRIPTION The generator interface shall be applied in conjunction with a new or existing backup generator and transfer switchgear capable of providing power to critical loads during an extended utility source outage and/or instances where the user has selected backup generator operation GENERATOR SET OPERATION Upon sensing a power disturbance on the utility source in excess of five seconds, the system control shall initiate startup of the generator. Once the generator is at operating voltage and frequency and the transfer switch has transferred to this alternate power source, the system control shall sense the voltage and frequency of the generator output. The system control shall synchronize the battery power output with that of the generator and reclose the PES. Upon closing of the PES, the system control shall ramp load current to the alternate power source in a seamless transition. Once load transfer to the generator has been completed, the system shall draw additional energy from this alternate power source to permit recharging of the batteries. After recharging has been completed, the system control shall initiate a return to the UPS ready state. Upon return of the utility source, the system shall automatically transfer back to use of that power source. In the event of repeated short-term utility source disturbances (each less than five seconds duration), the system shall initiate startup of the generator once 8.33% of the total energy has been discharged in the battery system. This function prevents run down of battery energy. The generator shall continue to run for a period of time sufficient to ensure full recharging of the system batteries. ) 15.1 SYSTEM DESCRIPTION The generator interface shall be applied in conjunction with a new or existing backup generator and transfer switchgear capable of providing power to critical loads during an extended utility source outage and/or instances where the user has selected backup generator operation. S&C Information Sheet

18 15.2 GENERATOR SET OPERATION Upon sensing a power disturbance on the utility source in excess of five seconds, the system control shall initiate startup of the generator. Once the generator is at operating voltage and frequency and the transfer switch has transferred to this alternate power source, the system control shall sense the voltage and frequency of the generator output. The system control shall synchronize the battery power output with that of the generator and reclose the PES. Upon closing of the PES, the system control shall ramp load current to the alternate power source in a seamless transition. Once load transfer to the generator has been completed, the system shall draw additional energy from this alternate power source to permit recharging of the batteries. After recharging has been completed, the system control shall initiate a return to the standby ready state. Upon return of the utility source, the system shall automatically transfer back to use of that power source. In the event of repeated short-term utility source disturbances (each less than five seconds duration), the system shall initiate startup of the generator once 8.33% of the total energy has been discharged in the battery system. This function prevents run down of battery energy. The generator shall continue to run for a period of time sufficient to ensure full recharging of the system batteries. 18 S&C Information Sheet