SECTION STATIC UNINTERRUPTIBLE POWER SUPPLY SYSTEM

Transcription

1 SECTION 0 PART 1 - GENERAL 1.1 SUMMARY A. Section Includes: 1. Uninterruptible power supply (UPS) system. B. Related Sections include but are not necessarily limited to: 1. Owner s - Bidding Requirements, Contract Forms, and Conditions of the Contract. C. Reference Drawings: 1. Drawing EP-01 Preliminary Electrical Equipment Layout. 1. QUALITY ASSURANCE A. Referenced Standards: 1. Institute of Electrical and Electronics Engineers (IEEE): a. C.1, Recommended Practice on Surge Voltages in Low-Voltage AC Power Circuits.. Underwriters Laboratories, Inc. (UL): a., Uninterruptible Power Systems. B. Qualifications: 1. UPS system manufacturer shall: a. Directly employ a nationwide service organization, consisting of factory trained field service personnel available for start-up and maintenance of UPS and associated equipment. b. Have sales and service representatives local to the Denver area.. Manufacturer shall assure emergency service including compliance with the following: a. One (1) toll-free number shall reach a qualified support person HRS/day, seven () days/week, days/year. b. Replacement parts shall be available through an extensive network to ensure aroundthe-clock parts availability throughout the country. 1. SUBMITTALS A. Proposal Data: Submit the following information with proposal. Failure to provide complete data may be cause for rejection. 1. Manufacturer and model.. Location of manufacture.. Nearest authorized service center.. Submittal schedule. Complete electrical ratings including: a. Rated input current with battery charge b. Maximum overcurrent protection (MOP). Dimensioned plan and elevation drawings indicating all clearances required for equipment operation and maintenance access.. Estimated total shipping weight. B. Shop Drawings: 1. Submit six () copies of shop drawings for Engineer review prior to fabrication and shipment.. Product technical data including: a. Technical data on all components.. Fabrication and/or layout drawings. a. Outline drawings of assembly Jefferson County Public Schools June 0-1

2 b. One line diagrams and wiring diagrams for assembly and components. c. Interconnection wiring diagrams. C. Operation and Maintenance Manuals: 1. See Specification Section 00 for: a. The mechanics and administration of the submittal process. b. The content of Operation and Maintenance Manuals. D. Miscellaneous: 1. See Specification Section 00 for requirements for the mechanics and administration of the submittal process.. Qualifications. 1. SITE CONDITIONS A. Ambient air temperature: - DegF to 0 DegF. B. Altitude: 00 FT above sea level. C. Equipment shall fit within the space identified on the drawings without reducing clearances below indicated values, code requirements, or manufacturer s recommendations. D. Seismic Criteria: 1. Equipment shall remain intact and operational during and following a seismic event meeting the following criteria per IBC. a. S s = Mapped MCE, spectral response acceleration at short periods = % b. S 1 = Mapped MCE, spectral response acceleration at 1 second periods = % c. Site class = D. d. I E = Importance factor = 1.. Include anchorage requirements and loadings for all equipment for these conditions with shop drawings. 1. SYSTEM DESCRIPTION A. Provide a UPS system that includes the following: 1. Inverter.. Rectifier/Battery charger.. Static bypass switch.. Integrated maintenance bypass switch.. Batteries and racks. B. The UPS system shall be rated to provide power to the indicated load and have a battery charger and batteries to maintain the load for minutes. 1. BID ALTERNATES A. Provide alternate pricing and dimensional and weight data for unit with /1V PH W output from internal output transformer. PART - PRODUCTS.1 ACCEPTABLE MANUFACTURERS A. Subject to compliance with the Contract Documents, the following manufacturers are acceptable: 1. Uninterruptible power supply system: a. APC. b. Chloride. c. Liebert. d. Eaton Powerware. B. Submit request for substitution in accordance with Specification Section Jefferson County Public Schools June 0 -

3 MANUFACTURED UNITS A. Standards: 1. UL.. IEEE C.1. B. Electrical Characteristics: 1. System capacity: a. Each UPS system shall maintain a load of 0 kva, at 0. power factor lagging, for minutes.. Rectifier/battery charger input: a. Voltage: 0 Vac, PH, wire plus ground. b. Frequency: 0 Hz.. Bypass input: a. Voltage: 0 Vac, PH, wire plus ground. b. Frequency: 0 Hz. c. Field selectable separate circuit or common to rectifier input.. Inverter output: a. Voltage: 0 Vac, PH, wire plus ground. b. Frequency: 0 Hz.. Bid Alternates: Integral output transformer. a. Provide dimensional information and price quote to include output transformer. b. Primary Voltage: delta-connected 0V. c. Secondary Voltage: Y/1 Vac, PH, wire plus ground. d. Frequency: 0 Hz.. System efficiency: a. Make over-all efficiency, input to output, at least 0 percent with the battery fully charged and the inverter supplying full-rated load. C. Rectifier/Charger: 1. General: a. The rectifier/charger shall contain solid-state equipment and controls necessary to convert incoming AC power to regulated DC power for input to the inverter and for battery charging. b. The rectifier/charger shall be phase-controlled, solid-state SCR type with constant voltage/current limiting circuitry.. Voltage range: a. Plus percent, minus percent of nominal without battery discharge.. Frequency range: a. Plus/minus percent of nominal.. Inrush current: a. 00 percent of full load current.. Input current limiting: a. Include a circuit to limit AC input current to percent of the full load input current.. Input harmonic suppression. a. Design rectifier/charger to limit the input harmonic current feedback into the source to a maximum of percent Total Harmonic Distortion (THD) with nominal input voltage and rated load on the inverter.. Power walk-in: a. Provide rectifier/charger with a walk-in circuit that causes the unit to assume the load gradually after the input voltage is applied. b. Currents shall increase gradually from percent to 0 percent over a second period after the battery open circuit voltage has been reached.. Input power factor: a. Provide rectifier/charger with a minimum power factor of 0. lagging with nominal input voltage and frequency and the inverter operating at full-rated load.. Overload protection and disconnection: 1-00 Jefferson County Public Schools June 0 -

4 a. Provide an automatic input circuit breaker for rectifier/charger disconnection and overload protection. b. The overload devices shall not be activated when the rectifier/charger is started under any of the operating conditions listed. c. Loss of control logic power shall cause the circuit breaker to automatically trip, isolating the rectifier from the utility.. Capacity: a. Provide rectifier/charger with sufficient capacity to support a fully loaded inverter and recharge the battery to percent of its full capacity within times the discharge time.. Fuse protection: a. Provide for each AC phase so that loss of any individual rectifier semi-conductor shall not cause cascading failures. b. Bolt fuses to bus bars at both ends. c. Display panel on front of unit shall indicate a blown fuse occurring on any phase of the rectifier.. DC filter: a. Provide an output filter to minimize ripple current into the batteries. b. AC ripple current into battery shall not exceed percent RMS. c. Filter shall be adequate to insure that DC output of rectifier/charger will meet input requirements of inverter without batteries connected.. Overvoltage protection: a. Provide DC Overvoltage protection such that UPS will shut down if DC voltage rises to the pre-set limit, and transfer to bypass.. Surge protection: a. Rectifier/charger shall sustain input surges without damage per criteria listed in IEEE C.1, Category B. D. Inverter: 1. General: a. The inverter shall contain solid-state equipment and controls to convert DC power from the rectifier/ charger or battery to regulated AC power for supporting critical load. b. The inverter shall be transistorized, phase-controlled, pulse width modulated design capable of providing the specified AC output.. Voltage regulation: a. The inverter steady-state output voltage shall not deviate by more than plus/minus 1 percent due to the following conditions: 1) Input voltage variation. ) Connected load. ) Battery voltage. ) Load power factor. ) Ambient temperature variations. ) Minimum to maximum DC bus voltage.. Voltage adjustments: a. Provide inverter with a control to manually adjust the output voltage +/- percent from the rated value.. Frequency control: a. Control output frequency of the inverter by an oscillator. 1) The oscillator shall be temperature compensated and hold the inverter output frequency to plus/minus 0.1 percent for steady state and transient conditions.. Frequency slew rate: a. 1 Hz per second maximum.. Harmonic distortion: a. The inverter shall provide harmonic neutralization and filtering necessary to limit the total harmonic distortion in the output voltage to percent and single harmonics to percent over the entire load range.. Transient response: 1-00 Jefferson County Public Schools June 0 -

5 a. The inverter transient voltage shall not exceed plus/minus percent due to the following system disturbances: 1) A 0 percent step load application and rejection with zero initial load or 0 percent initial load. ) Transfer of rated load to the bypass source due to inverter internal fault. ) Make output voltage return to within plus/minus percent of the steady-state value within milliseconds.. Overload: a. Make inverter capable of supplying currents and regulated voltage for overloads of percent for minutes. b. Make inverter capable of supplying an overload current of 0 percent with plus/minus percent voltage regulation for 0 seconds. c. Make audible alarm indicate overload operation. 1) Make inverter transfer the load to bypass when the overload period expires.. Fault clearing and current limit: a. The inverter shall be capable of at least 00 percent current for short circuit conditions. 1) If the short circuit is sustained, the load shall be transfered to the bypass source and the inverter shall disconnect automatically from the critical load bus. b. Provide inverter with current limiting protection to prevent damage to components.. Inverter DC protection: a. Protect inverter by the following alarms and trips, independently adjustable for maximum system flexibility. 1) DC overvoltage trip. ) DC undervoltage warning alarm. ) DC undervoltage trip.. Overcurrent protection: a. Protect inverter from excessive overloads, including faults and reverse currents with current limiting fuses.. Surge protection: a. Provide inverter with built-in protection against undervoltage, overcurrent, and overvoltage surges on the output caused by load transfer between the UPS and an external synchronized bypass source. E. Static Bypass Switch: 1. General: a. Provide a static bypass switch as an integral part of the UPS. b. Provide control unit with an automatic transfer circuit that senses the status of the inverter logic signals and alarm conditions to provide an uninterrupted transfer of the load to the bypass source without exceeding the transient limits specified herein when a malfunction occurs in the UPS.. Static bypass switch: a. Make static bypass switch a naturally commutated, high-speed static transfer device rated to conduct full load current continuously.. Operation: a. Connect static switch to the bypass source and assume the critical load when required and provide the following features: 1) Uninterrupted transfer: a) Make static bypass switch automatically assume the critical load after the inverter logic senses one of the following conditions: (1) Inverter overload period expired. () Critical bus overvoltage or undervoltage. () Battery protection period expired. () UPS failure. ) Uninterrupted automatic retransfer: 1-00 Jefferson County Public Schools June 0 -

6 a) If the transfer control circuit is set for automatic retransfer, make UPS capable of retransferring the critical load to the inverter when the overload is removed, or the critical bus voltage stabilizes. b) Make inverter automatically walk in smoothly to the output bus voltage, parallel and share the load with the bypass source, and assume the load in the "bumpless" manner prior to disconnection of the bypass source. c) Do not use static switch during retransfers. ) Transfer lockout: a) The static switch logic shall not allow a transfer to bypass if one of the following conditions exist: (1) Bypass overvoltage/undervoltage (plus/minus percent of nominal). () Bypass frequency out of limits (plus/minus -1.0 Hz, adjustable). () Bypass out of sync. () Static switch disabled. ) Uninterrupted manual transfer: a) Provide a manually initiated make-before-break transfer for routine maintenance purposes. b) This transfer shall be automatically inhibited if the bypass source is outside of the limits specified in paragraph (a) above.. Overloads: a. percent rated load continuously. b. 0 percent for 0 seconds. c. 00 percent for two () cycles. F. System Status and Control: 1. General: a. Provide UPS with a system status panel to provide monitoring and control of the complete system.. System metering: a. Meter accuracy 1 percent or better. b. Provide with the capability of monitoring the following system functions: 1) AC input voltage. ) AC input current. ) Input frequency. ) Battery voltage. ) Battery charging/discharge current. ) AC output voltage. ) AC output current. ) AC output frequency.. Controls: a. UPS start-up, shutdown, and bypass operations shall be accomplished by a single rotary control switch. 1) An advisory display and menu-driven user prompts shall be provided to guide the operator through system operation without the use of additional manuals. ) Pushbuttons shall be provided to display the status of the UPS and to test and reset visual and audible alarms.. System mimic: a. A mimic panel shall be provided to depict a single line diagram of the UPS. 1) Indicating lights shall be integrated within the single line diagram to illustrate the status of the UPS. ) Two () LEDs located on the diagram shall indicate whether UPS input and/or output power is present. ) The diagram shall be color coded with the positions of the rotary control switch for visual confirmation of the UPS operating mode.. System alarm messages: 1-00 Jefferson County Public Schools June 0 -

7 a. Provide the following system alarm messages with visual and audible alarm annunciation: 1) Input power out of tolerance. ) Input phase rotation incorrect. ) Incorrect input frequency. ) Charger in reduced current mode. ) Battery charger problem. ) Battery failed test. ) Low battery warning. ) Low battery shutdown. ) DC bus overvoltage. ) Bypass frequency out of range. ) Load transferred to bypass. ) Excessive retransfers attempted. ) Static switch failure. ) UPS output not synchronized to input power. ) Input power single phased. ) Input voltage sensor failed. ) Inverter leg over current in X-phase. ) Output undervoltage. ) Output overvoltage. ) Output overcurrent. 1) System output overloaded. ) Load transferred to bypass due to overload. ) Overload shutdown. ) Control error. ) Critical power supply failure. ) Load transferred due to internal protection. ) External shutdown (remote EPO activated). ) Fan failure. ) Overtemperature shutdown impending. 0) Overtemperature shutdown.. Provide an Ethernet communications port with SNMP protocol to make all UPS status and alarm information available over the Owner s network.. A set of form "C" remote alarm contacts shall be provided for customer use. a. These contacts shall indicate the following information: 1) Load on UPS. ) Load on bypass. ) Battery discharging. ) Low battery warning. ) System overload. ) Ambient over temperature. ) System summary alarm. ) New alarm condition (for a second system alarm condition). G. Enclosures: 1. House UPS in free-standing, dead-front enclosures with a welded steel framework. a. Door shall be of GA steel; framework shall be of GA steel. b. Mount instruments, status indicators, and controls at eye-level and accessible from the front of the UPS module.. Provide forced-air cooling to ensure that components are operated within their environmental ratings. a. Equip blower motors with sealed bearings. b. Provide redundant blowers so that a single blower failure will not cause temperatures to increase beyond acceptable levels. c. Equip air inlets with standard type filters, which are replaceable from outside the unit Jefferson County Public Schools June 0 -

8 d. Protect all air inlet and exhaust openings by perforated or slotted metal guards.. Enclosure shall require front access only for ventilation and maintenance and shall be capable of being installed against a wall with no spacing. H. UPS Battery System: 1. The battery power pack shall include sealed, lead-acid valve regulated battery cells housed in a separate cabinet that matches the UPS cabinet styling to form an integral system lineup.. Battery cells shall be mounted on slide-out trays for ease of maintenance.. A disconnect means shall be included for isolation of the battery pack from the UPS module.. Casters and leveling feet shall also be provided with the battery power pack cabinet for ease of installation. I. Environmental Conditions: 1. Make UPS capable of withstanding any combination of the following environmental conditions in which it must operate without mechanical or electrical damage, or degradation of operating characteristics. a. Ambient temperature: 1) Operating: + DegC to +0 DegC. ) Non-operating and storage: - DegC to +0 DegC. b. Relative humidity: 1) Operating: 0 to percent for temperature from + DegC to +0 DegC, excluding condensation due to temperature change. ) Non-operating and storage: 0 to percent, excluding condensation due to temperature change. c. Barometric pressure: 1) Operating: From sea level to,000 FT above sea level. ) Non-operating and storage: From sea level to approximately 0,000 FT.. OPERATION A. System Definition: 1. Make UPS automatically effect continuity of electric power within specified tolerances, without interruption, upon failure or deterioration of the normal power supply.. Maintain continuity of electric power to the load for an emergency period with the inverters supplied by the batteries, up to the specified maximum time or until restoration of the normal power supply. B. Modes of Operation: 1. Design UPS to operate as an on-line reverse transfer system in the following modes: a. Normal: 1) Critical load is continuously supplied by the inverter. ) Rectifier/battery charger derives power from the utility AC source and supplies DC power to the inverter while simultaneously float charging the battery. b. Emergency: 1) Upon failure of the utility AC power critical load is supplied by the inverter, which without any switching, obtains its power from the storage battery. ) There shall be no interruption to the critical load upon failure or restoration of the utility AC source. c. Recharge: 1) Upon restoration of the utility AC source, the rectifier/charger automatically powers the inverter and simultaneously recharges the battery. d. Bypass mode: 1) If the UPS must be taken out of service for maintenance or repair of internal failures, the static switch transfers the load to the alternate source without an interruption Jefferson County Public Schools June 0 -

9 1 ) Retransfer of the load is accomplished by automatically synchronizing the UPS to the alternate source, paralleling the inverter with the alternate source, and allowing the inverter to ramp into the load and then disconnect the alternate source. e. Downgrade: 1) If the battery only is taken out of service for maintenance, it is disconnected from the rectifier/charger and inverter by means of a circuit breaker. ) The UPS shall continue to function herein, except for power outage protection.. SOURCE QUALITY CONTROL A. Factory Testing: 1. Each UPS shall be tested in modern facilities that have sufficient electrical capacity and sufficient loads as required to complete the tests.. A test report showing that the equipment has passed the factory tests and has demonstrated the capability to support the lad, as required by this specification, shall be submitted promptly after completion of the tests.. The standard factory test procedures shall be used and shall not be limited to the following test: a. Control logic tests. b. Utility and UPS sync tests. c. Alarm and annunciation function tests. d. Load tests. e. Operation on battery. f. Transfer tests PART - EXECUTION.1 FIELD SERVICES A. System Start-up and Site Testing: 1. Inspections and test procedures shall be performed by factory trained field service personnel.. Visual inspection: a. Inspect equipment for signs of damage. b. Verify installation per Drawings. c. Inspect cabinets for foreign objects. d. Verify neutral and ground conductors are properly sized and configured. e. Inspect all cell cases. f. Inspect each cell for proper polarity. g. Verify all printed circuit boards are configured properly.. Mechanical inspection: a. Check all control wiring connections for tightness. b. Check all power wiring connections for tightness. c. Check all terminal screws, nuts, and/or spade lugs for tightness.. Electrical inspection: a. Check all fuses for continuity. b. Confirm input and bypass voltage and phase rotation is correct. c. Verify control transformer connections are correct for voltages being used. d. Assure connection and voltage of battery strings.. Unit start-up: a. Energize control power. b. Perform control/logic checks and adjust to meet specification. c. Verify DC float and equalize voltage levels. d. Verify DC voltage clamp and overvoltage shutdown levels. e. Verify battery discharge, low battery warning and low battery shutdown levels. f. Verify fuse monitor alarms and system shutdown. g. Verify inverter voltages and regulation circuits Jefferson County Public Schools June 0 -

10 h. Verify inverter/bypass sync circuits and set overlap time. i. Perform manual transfers and returns. j. Simulate utility outage. k. Verify proper recharge. B. Commissioning 1. Provide services of factory-trained field service personnel to support verification testing of UPS and related equipment/systems during field commissioning.. Include a minimum of hours on site for field verification testing in addition to other specified requirements.. Coordinate with Owner s contractor and commissioning authority.. OWNER PERSONNEL TRAINING A. Inform Owner seven () days in advance of starting system start-up and testing. 1. This will provide the owner the option of having an operating staff member witness the start-up and testing.. This will also serve as a training tool for the staff member to see how the Field Service engineer trouble shoots any problems that arise during the start-up and testing. B. Upon completion of the start-up, the Field Service engineer will instruct operating staff in proper operation and maintenance, of the installed equipment including hands-on training. 1. HRS minimum. END OF SECTION 1-00 Jefferson County Public Schools June 0 -