316-2 UNINTERRUPTIBLE POWER SUPPLY SYSTEMS
PART 1 GENERAL
1.1 SCOPE:
Provide labor, materials, equipment and services, and perform operations required for
installation of uninterruptible power supply systems and related work as indicated on the drawings and specified herein.
Work Included: The work shall include, but not limited to, the following:
1.1.1.1
Solid state rectifiers/changers.
1.1.1.2
Static inverters.
1.1.1.3
Static transfer switches.
1.1.1.4
Maintenance bypass switches.
1.1.1.5
* Batteries, Digital Monitoring and Management System / UPS monitoring and Control System
1.1.1.6
Accessories.
1.1.1.7
Furnishing load banks and test instruments during field testing.
1.2 SYSTEM DESCRIPTION:
1.2.1
During normal operation, utility power will supply the rectifier(s) which converts the incoming AC to DC. This DC is supplied to the inverter(s) which converts it to AC to feed the critical load. A battery is “floated” on the DC bus to maintain the DC bus voltage and supplies power to the inverter(s) in the event of a loss of utility power. The battery will supply sufficient power to the inverter(s) to maintain inverter output for the specified time. When the battery discharges to the minimum inverter design voltage, the inverter will shut down in an orderly manner. Upon restoration of utility power (or the emergency standby generator system), the rectifier(s) will resume feeding power to the inverter section and simultaneously recharge the battery.
1.2.2
The system shall be provided with a bypass section such that utility company power (or the emergency standby generator system) may be connected to the load both manually or by automatic control in case of failure of the UPS equipment by synchronizing and paralleling the two sources before the transfer is made without an interruption. Retransfer shall be made in the same manner.
1.3 QUALITY ASSURANCE:
1.3.1
Materials and equipment shall conform to the latest edition of reference specifications specified herein and to applicable codes and requirements of local authorities having jurisdiction.
1.3.1.1
Code Compliance: Comply with the applicable National Electrical Code (NEC) as applicable to installation and construction of electrical equipment.
1.3.1.2
* Standards Compliance: Comply with applicable requirements of IEC Standard or equal international standards BS / NEMA and IEEE / IEC 62040-2.
1.3.1.3
Radio frequency interference (RFI) suppression to be in accordance with CISPR requirements.
1.3.2
Manufacturer’s Qualifications: Firms regularly engaged in manufacture of un-interruptible power supply systems, of types and ratings specified whose products have been in satisfactory use in similar service for not less than 5 years. A list of installed systems of the same type and ratings as specified shall be submitted to the Client Representative.
1.3.3
Compliance Review:
1.3.3.1
Manufacturer shall provide a Compliance Review of UPS plans and specifications. The first section of the Compliance Review shall be a review of the plans. The second section shall be a paragraph-by-paragraph review of the specifications with the following information, “C”, ”D”, or “E” marked in the margin of the original specification and any subsequent addendum.
a. “C” : Comply with no exceptions.
b. “D” : Comply with deviations. For each and every deviation, provide a numbered note with reasons for the proposed deviation and how the intent of the specification can be satisfied.
c. “E” : exception, do not comply. For each and every exception, provide a numbered note with reasons and possible alternatives.
1.3.3.2
Unless a deviation or exception is specifically noted in the Compliance Review, it is assumed that the manufacturer is in compliance with the plans and specifications. Deviations or exceptions taken in cover letters, subsidiary documents or by omissions or by contradiction do not release the manufacturer from being in compliance unless the exception or deviation has also been specifically noted in the Compliance Review.
1.4 SUBMITTALS:
1.4.1
Submit the following in accordance with Submittal Requirements specified in Section 16010- Electrical General Requirements.
1.4.1.1
Product Data: Submit manufacturer’s data on un-interruptible power supply systems and components.
1.4.1.2
Shop Drawings: Submit dimensioned layout drawings and descriptive data of UPS systems and accessories including, but not limited to, weights, rectifiers/chargers, inverters, static transfer switches, maintenance switches, batteries and instruments, indicating accurately scaled UPS system equipment locations and their spatial relationship to associated equipment; show connections to normal and standby power supplies, elementary diagrams of protection, control and instrumentation systems, wiring and single line diagrams, time current curves of protective devices. Submit calculations to indicate compliance with battery requirements of scheduled standby use with no more than specified drop in battery voltage.
1.4.1.3
Maintenance Data: Submit maintenance data, parts and recommended spare parts list for each un-interruptible power supply and accessory; including “troubleshooting” maintenance guide. Include this data, product data, and shop drawings in maintenance manual; in accordance with requirements of Section 16010.
1.4.1.4
Field Test Procedure: Submit a detailed site acceptance test procedure.
1.4.1.5
Submit a reliability data for the proposed equipment in terms of the mean time between failures statistical records.
1.4.1.6
Submit a detailed factory acceptance test procedure. System is to undergo a functional and load test program approved by the Client Representative and is to undergo a minimum 72 hours “burn-in test” under site simulated conditions prior to shipment.
1.4.1.7
Submit certified factory and site test data and reports, for the UPS equipment and the batteries.
1.4.1.8
Submit battery manufacturer name, container type, the total number of containers required per UPS module, battery and rack dimensions and weights.
1.4.1.9
Submit heat losses data, efficiency, ambient conditions and limitations on electronic equipments, etc.. Beyond such components may suffer partition permanent damage.
1.5 DELIVERY, STORAGE AND HANDLING:
UPS equipment and batteries shall be delivered undamaged to the site by an experienced direct carrier using appropriate air ride suspension equipment. In no case shall be UPS equipment and batteries be shipped without prior written approval of the Client Representative. Premature shipment will be automatic cause for rejection.
Handle un-interruptible power supply equipment carefully to prevent damage, breaking and scoring. Do not install damaged units or components; replace with new.
Store units in clean dry place. Protect from weather, dirt, fumes, water, construction debris and physical damage.
1.6 WARRANTY AND GUARANTY:
1.6.1
The UPS system warranty shall be no less than one year after initial startup, or 18 months after shipment, whichever period expires first, and must include costs, including repair, parts, labor, travel and living for the manufacturer’s service personnel. The manufacturer shall respond to requests for and provide warranty service within 8 hours.
1.6.2
Battery: The battery provided herein shall be guaranteed by the UPS manufacturer on a pro rated basis for twenty years (unless otherwise specified herein), provided that the prevailing ambient temperature of the battery area does not exceed 80 degrees F. Batteries shall deliver a minimum of 100 percent of rated capacity initially and a minimum of 80 percent of rated capacity at the end of the battery guarantee period in accordance with IEEE Standard 485.
1.6.3
Efficiency: The manufacturer shall guaranty, in writing, the stated system efficiency. If the stated efficiency is less than that stated, the manufacturer shall refund to the user an amount based on additional power costs incurred by loss of efficiency over a three-year operating period.
Part 2 PRODUCTS
2.1 APPROVED MANUFACTURERS:
2.1.1
Manufacturers: subject to compliance with requirements, provide un-interruptible power supply systems of one of the following:
2.1.1.1
UPS System:
a. newave. - sweden
b. Merlin Gerin MGE UPS System - France
c. adpos - Germany
2.1.1.2
a. ALCKAD – UK
b. Exide / Marathon
c. Varta – Germany
2.2 MATERIALS AND EQUIPMENT:
2.2.1
Provide UPS systems of types, continuous duty, ratings and electrical characteristics indicated including, but not limited to, solid state rectifiers/chargers, static inverters, static transfer switches, maintenance bypass switches, battery circuit breakers and batteries. Construct with ancillary instruments, indicators and controls as required for UPS systems to operate as an independent installation. Mount ancillary components on front of enclosures. Finish enclosures as indicated or, if not otherwise indicated, in manufacturer’s standard finish and color. Select system with the following functional and construction features:
2.2.1.1
During failure of normal power, maintain battery power to load for the duration specified through inverter with “No-breaks” or interruptions. Upon return of normal AC power to rectifier/charger, automatically equalize recharge batteries and revert to floating condition.
2.2.1.2
The UPS system shall be redundant unless otherwise indicated.
a. For redundant systems, unless otherwise indicated or shown on the drawing provide redundant system, the UPS shall have one more module than required to supply the full rated load. The malfunction of one of the modules shall cause the module to be disconnected from the critical load by its static isolator and the remaining module(s) shall continue to carry the load. Upon repair of the module, it shall be reconnected to the critical load to resume redundant operation. Any module shall also be capable of being taken off the critical load manually for maintenance without disturbing the critical load bus. When one module is off-line, malfunction of a second module shall cause the load to be transferred automatically and uninterrupted to the bypass line by the use of the static transfer switch if the load exceeds the capacity of the modules remaining on-line. The modules shall automatically share the load at all times. The output currents of individual UPS module shall not exceed plus/minus 5 percent unbalanced.
b. The UPS system shall have provisions for necessary interface connections and accessory items to insure it can be easily and economically expanded at a future time for increased capacity as specified.
2.2.1.3
Each UPS module shall include a rectifier/charger, three phase inverter, associated transformers, synchronizing equipment, protective devices and accessories as required.
2.2.1.4
Each UPS module shall have a properly rated circuit breaker to isolate it from the battery. When open, there shall be no battery voltage present in the UPS module enclosure. The UPS module shall automatically be disconnected from the battery by opening the disconnect when the battery reaches the minimum discharge voltage level or when signaled by other control functions. The UPS module shall be provided with a push-button to trip the module battery disconnect from the module control panel.
2.2.1.5
The overall efficiency, input to output, shall be in accordance with the specified system requirements measured with the battery fully charged and the inverter supplying full rated load. The manufacturer shall guarantee the efficiency of the system in his proposal. Overall efficiency shall not be less than 90 percent at full load.
2.2.1.6
The UPS shall be constructed of replaceable subassemblies. Printed circuit assemblies shall be of the plug-in type. Like subassemblies and components shall be interchangeable.
2.2.1.7
Noise generated by the UPS is not to exceed 65 dB (A) at 1.0 meter distance any where within UPS Security room, in accordance to IEC relevant standards.
2.2.1.8
Rectifier and inverter power semiconductor switching circuits shall be fused to prevent cascading or sequential semiconductor failures. Fuses shall be provided with blown fuse indicators. Provide alarm indication on the control panel.
2.2.1.9
Active electronic devices shall be solid-state. Relays shall be provided with dust covers.
2.2.1.10
Electromagnetic interference (EMI) shall be minimized to ensure that computer systems, or other sensitive electronic systems, shall not be adversely affected by the UPS.
2.2.1.11
The UPS shall have built-in protection against under voltage, over current and over voltage conditions including low-energy lightning surges, introduced on the primary AC source. UPS operations and the critical AC load bus shall not be affected by impressed transient voltage and current levels when tested per the guidelines of IEC or equivalent standards.
2.2.1.12
Energized terminals shall be shielded to ensure that maintenance personnel do not inadvertently come in contact with energized parts or terminals. A means to de-energize the static switch shall be provided when the UPS is in the maintenance bypass mode of operation.
2.2.1.13
With the critical load powered from the maintenance bypass circuit, it shall be possible to check out the operation of the rectifier/charger, inverter and static transfer switch. It shall also be possible to check battery operation.
2.2.1.14
Plug-in printed circuit boards shall have mechanical interlocks to prohibit a board from being plugged into the wrong place and electrical interlocks to prohibit system operation if boards are not properly installed.
2.2.1.15
Components and protective devices shall have adequate interrupting capacities for the duties imposed either from the normal power or the UPS systems.
2.2.1.16
Prior to shipment, the manufacturer shall fully test the system to assure compliance with the specifications. These tests shall include operational discharge and recharge tests on at least a one minute battery plant to assure guaranteed rated performance.
2.2.1.17
The UPS system shall be capable of handling up to 50 percent non-linear loads with output distortion less than 5 percent THD.
2.2.1.18
Input filters shall be provided to reduce input harmonic distortion caused by the UPS system to less than 5 percent THD.
2.2.2
Enclosures: Provide freestanding IP to IEC 144 rigid enclosures, of sizes required and capable of resisting external vibrations and electromagnetic stimulus; including but not limited to, battery chargers, inverters, automatic solid-state transfer switches with manual bypass, and associated equipment. Design enclosures for front entry access to components. Mount recessed type instrumentation on front door of enclosure. Cable entry shall be from top or bottom. Enclosure shall be treated against corrosion and with light gray RAL 7032 baked paint or epoxy finish to approved standards.
2.2.2.1
* Provide a redundant fan cooling system designed for fans, with natural convection as standby. Design for ambient environment of 0 to 45 degrees C and 0 to 95 percent relative humidity. Fan power shall be derived from the UPS output.
2.2.3
Rectifiers/Chargers: Provide rectifiers/chargers, of ratings and electrical characteristics required, consisting of primary input circuit breakers, isolation transformers, solid-state 12 pulse type rectifiers, DC filters, battery circuit breakers, with associated control circuitry. Select rectifiers/chargers with capability of simultaneously supplying DC power to float-charge battery banks and to inverters which are providing power permanently to essential AC loads. Limit current outputs to prevent fully discharged batteries from overloading battery chargers. Provide sufficient output capacity to recharge discharged batteries to 95 percent of full capacity within 10 times specified battery discharge support time, while simultaneously operating fully loaded inverters. When batteries are fully charged, regulate charger’s output voltage to manufacturer’s recommended value for maintaining charge. Equip UPS systems with automatic electronic shutdown to prevent possible damage by over discharge. Where batteries are completely discharged, return UPS systems automatically to standby status to prevent cell reversal in batteries and damage to UPS system.
2.2.3.1
The output DC filter shall be adequate to insure that the DC output of the rectifier/charger will meet the input requirements of the inverter. The inverter shall be able to operate from the rectifier/charger with the battery disconnected. Maximum ripple current into the battery shall not exceed 2 percent RMS.
2.2.3.2
Provide DC over voltage protection so that if the DC voltage rises to the preset limit, the UPS is to shutdown automatically and the load transferred to the static bypass line uninterrupted.
2.2.4
Static Inverter: Provide three phase solid-state static inverters; comprised of inverters, filters, output
Power transformers and regulators for supplying regulated alternation-current outputs. Provide
Components with recovery time and maximum harmonic content, under full-load conditions, as required
and specified. Provide DC input and AC output circuit breakers for protecting inverters overloads
conditions. Select associated control circuitry capable of starting and stopping inverters electronically.
2.2.4.1
The inverters shall be capable of supplying current and voltage for overloads exceeding 100 percent up to
150 percent of full load current. A status indicator and audible alarm shall indicate overload operation. The
UPS shall transfer the load to bypass when overload capacity is exceeded.
2.2.4.2
The inverter shall be capable of supplying and overload current of 150 percent of its full-load rating for 60
seconds. For greater currents or longer time duration, the inverter shall have electronic current-limiting
protection to prevent damage to components. The inverter shall be self-protecting against any magnitude
of connected output overload. Inverter control logic shall sense and disconnect the inverter from the
critical AC load without the requirement to clear protective fuses.
2.2.4.3
For rapid removal of the inverter from the critical load, the inverter control electronics shall simultaneously
turn off the inverter transistors. Simultaneously, the static transfer switch shall be turned on to maintain
continuous power to the critical load.
2.2.4.4
The inverter shall be protected by the following disconnect levels, which shall be independently adjustable
for UPS application flexibility
.
a. DC Over voltage Disconnect.
b. DC Under voltage Warning (Low Battery Reserve).
c. DC Under voltage Disconnect (End of Discharge).
2.2.4.5
To prevent battery damage from over discharging at light load, the UPS control logic shall automatically
raise the shutdown voltage set point as the load is reduced.
2.2.4.6
The inverter shall use a manual control to adjust the output voltage from plus/minus 5 percent of the
nominal value.
2.2.4.7
The output frequency of the inverter shall be controlled by an oscillator. The oscillator shall be
Temperature compensated and hold the inverter output frequency to plus/minus 0.1 percent for steady
state and transient conditions. Drift shall not exceed 0.1 percent during a 24-hour period. Total frequency
deviation, including short time fluctuations and drift, shall not exceed 0.1 percent from the rated
frequency.
2.2.4.8
Electronic controls shall be provided to regulate each phase so that an unbalance loading will not cause
the output voltage to go outside the specified voltage unbalance or phase displacement.
2.2.5
Synchronizing Controls: Provide master synchronizing oscillators and associated circuitry which
automatically synchronizes and phase-locks power converter with incoming AC bypass line ; having
frequency range of 50 Hz, plus/minus 0.5 percent, and with field programmable frequency synchronization
limits in steps of 0.5 percent, to 1.5 percent of nominal. Equip with indicator lamp which when ON
indicates matching of UPS output and bypass voltage and that UPS is synchronized and phase-locked
2.2.6
Static Transfer Switches: Provide solid-state static transfer switches, of types and ratings as required
with automatic transfer circuits which senses alarm conditions and causes automatic uninterrupted
transfer of load without exceeding specified transient limits. Provide switches having capacity to supply
full-load current continuously.
2.2.6.1
The static transfer switch shall have an overload rating of 200 percent rated load for five minutes and
2000 percent rated load for two cycles. The static transfer switch control logic shall contain an automatic
transfer control circuit that senses the status of the inverter logic signals, and operating alarm conditions
This control circuit shall provide an uninterrupted transfer of the load to an alternate bypass source, when
an overload or malfunction occurs within the UPS, or for bypassing the UPS for maintenance.
2.2.6.2
The transfer control logic shall automatically turn on the static transfer switch, transferring load to the
bypass source, after the transfer logic senses one of the following conditions:
a. Inverter overload capacity exceeded.
b. Critical AC load over voltage or under voltage.
c. Battery protection period expired.
d. UPS fault condition.
2.2.6.3
The transfer control logic shall inhibit a transfer (manual or automatic) of the load to the bypass source if
one of the following conditions exists:
a. Inverter/bypass voltage difference exceeding preset limits.
b. Bypass frequency out of limits.
c. Bypass out-of-synchronization range with inverter output.
2.2.6.4
Retransfer of the load from the bypass source to the inverter output shall be automatically initiated unless
inhibited by manual control. The transfer control logic shall inhibit a retransfer (manual or automatic) of the
critical load to the inverter if one of the following conditions exists:
a. Bypass out of synchronization range with inverter output.
b. Inverter/bypass voltage difference exceeding preset limits.
c. Overload condition exists in excess of inverter full load rating.
d. UPS fault condition present.
2.2.7
Maintenance Bypass Switches: Provide circuit-breaker type maintenance bypass switches, of types and
Ratings required, mechanically operated, key interlocked with system output breaker with switchable
modes; normal and test, to isolate and bypass the rectifier/charger, inverter and static transfer switch.
Transfer inhibited warning circuit is to be provided to give an alarm indication in case bypass supply
is beyond acceptable tolerances
.
2.2.8
Batteries:
2.2.8.1
General:
a. Storage batteries shall be provided to supply the specified backup time upon AC input failure. Batteries shall provide the full specified backup time and be demonstrated at the site acceptance test immediately following delivery and installation. Selection of batteries shall take into account the inverter efficiency such that the battery DC kW rating, as a minimum, shall be equal to the module output kW rating divided by a number equal to the inverter efficiency minus 1.5 percent to compensate for losses in the DC cable runs as well as tolerance in the battery supplier’s accuracy of rating charts.
b. Separate sets of storage batteries shall be provided for each module with sufficient kW and kVA rating to maintain module rated output for the specified backup time at 25 degrees C, and allowing for a maximum voltage drop of 1 percent from the battery terminals to the inverter DC bus, with the inverter operating at full rated output to a discharge limit of no less than 1.67 volts per cell.
c. Container shall be of the heavy duty industrial type designed for UPS power service, fabricated of clear Lexan polycarbonate with an oxygen index of 28, have explosion proof vent and ample space within the container to allow for positive plate growth without developing internal stresses in the container and cover.
d. Provide bus container connection for container to container connections and insulated copper cable connectors for connection of rows of containers. Provide cable terminal plates which will coordinate with battery cable supports so that stresses on battery terminals are eliminated. Lead plated copper internal connectors shall be sized to maintain terminal voltages within voltage window limits when supplying maximum current. Cell connector hardware shall be stainless steel grade 316 minimum capable of resisting battery acid corrosion. Provide insulated terminal and connector covers. Battery cable lugs shall be of the crimp type.
d. Batteries shall be furnished with accessories including, but not limited to, the following:
1. Thermometer.
2. Hydrometer with wall mounted holders.
3. Tools and fittings to assemble and disassemble the battery.
4. Cell lifting device.
5. Indicated cell numbers.
6. Anti-oxidation compound
2.2.8.2
Batteries and Racks:
a. The battery shall be of the heavy duty industrial type, with specific gravity of 1.210 and designed for UPS power service. The cells shall be of the lead calcium Exide DB or approved equal with a 10 year guarantee, type, suitable for office environment, have no gassing and need no watering or special ventilation.
b. Battery banks shall be arranged to minimize the requirements for floor space, consistent with providing for safe servicing of the cells and with a maximum of three tiers high. Provide suitable Code approved steel racks for support of batteries. Racks shall be protected with battery electrolyte resistant paint. Racks shall be designed, constructed and braced for the site seismic zone.
2.2.9
2.2.9.1
Monitoring Control: Provide a microprocessor based unit status display and controls section. Electrically-illuminated visual indicators shall be of the light-emitting diode (LED) type. Operator controls and monitors shall be located on the front of the UPS cabinet. The monitoring functions such as metering status and alarms shall be displayed on an alphanumeric digital display. The following shall be displayed:
a. Metering:
1. Input AC voltage line-to-line and line-to-neutral for each phase.
2. Input AC current for each phase.
3. Rectifier output DC current.
4. Battery voltage.
5. Battery charge/discharge current.
6. Output AC voltage line-to-line and line-to-neutral for each phase.
7. Output AC current for each phase.
8. Percent of rated load being supplied by the UPS.
9. Battery time left during battery operation.
b. Alarms:
1. Input power failure.
2. Battery discharging.
3. Low battery.
4. Overload.
5. Overload shutdown.
6. Load on bypass.
7. Equipment over temperature.
8. Over temperature shutdown.
9. Fan failure.
10. DC over voltage.
11. Control power failure.
12. Output over voltage.
13. Output under voltage.
14. Fuse cleared.
15. Rectifier/charger failure.
16. Static transfer switches failure.
c. An audible alarm shall be provided and activated by any of the above alarm conditions
d. The following alarms shall be displayed but shall not activate the audible alarm.
1. On maintenance bypass.
2. On static bypass line.
3. Sync with bypass line.
4. Not in sync with bypass line.
5. Out of frequency range.
6. Rectifier/charger in current limit mode.
7. Battery circuit breaker open.
e. Controls: UPS startup, shutdown, and maintenance bypass conditions shall be accomplished by a control switch. Push buttons shall be provided to display the status of the UPS. Push buttons shall also be provided to test and reset visual and audible alarms.
f. Mimic Panel: A mimic panel shall be provided to depict a single line diagram of the UPS.
g. The system control panel shall contain a mimic panel in the format of a single line diagram with status indicators for the following items:
1. System input breaker status, one for closed and another for open.
2. Module on-line, one per UPS module.
3. Battery circuit breaker status, one for closed and another for open.
4. System output breaker status, one for closed and another for open.
5. Bypass breaker status, one for closed and another for open.
6. Status transfer switch status, one for off-line and another for available.
h. The UPS system control panel shall be provided with local emergency shutdown provisions. Activation of the local emergency shutdown shall cause the critical load to be automatically transferred to bypass uninterrupted, and the module input, output and battery circuit switches to open, isolating the UPS module from sources of power. Provisions shall be made for an interface with a remote emergency power off contact which, when activated, removes power from the critical bus.
I. A summary alarm contact shall be provided, activated by any alarm condition or when the utility power source fails and the battery is discharging.
2.2.10
System Requirements:
1. The UPS system shall conform to or exceed the following:
a. AC Input to UPS
1. * Voltage Configuration: 3-phase 43-wire plus ground, 380Y/220 volts.
2. Voltage Range
3. Frequency: Nominal frequency plus/minus 5 percent.
4. Power Factor: 0.8 lagging at nominal input voltage and full rated UPS output load.
5. Inrush Current: 600 percent of full load current maximum for transformer magnetization surge.
6. Current Limit: 125 percent of nominal AC input current maximum, and adjustable.
7. Input Current Walk-in: 15 seconds to full rated input current.
8. Surge Protection: Sustains input surges without damage per criteria listed in ANSI C62.41-1950.
9. Current Distortion: 10 percent THD maximum at full load.
10. Efficiency: Minimum 91 percent at full load, 90 percent at 75 percent load, 88 percent at 50 percent load.
b. AC Output, UPS Inverter:
1. * Voltage Configuration: Three-phase 4-wire plus ground 380Y/220 Volts.
2. Voltage Regulation: Plus/minus 0.5 percent three phase RMS average for a balanced three-phase load for the combined variation effects of input voltage, connected load, battery voltage ambient temperature and load power factor.
3. Plus/minus 2 percent three-phase RMS average for a 50 percent unbalanced load for the combined variation effects of input voltage, connected load, battery voltage, ambient temperature, and load power factor.
4. Voltage Adjustment Range
5. Frequency: Nominal frequency plus/minus 0.1 percent.
6. Frequency Slew Rate: 1.0 Hz per second maximum.
7. Phase Displacement: Plus/minus 1 degree for balanced load, Plus/minus 3 degrees for 50 percent unbalanced load.
8. Bypass Line Sync Range
9. Load Power Factor Range
10. * Output Power Rating: 600 kVA at 0.8 lagging power factor.
11. Overload Capability: 125 percent for 10 minutes. 150 percent for 60 seconds, 300 percent for 1 cycle.
12. Inverter Output Voltage Adjustment: Plus/minus 5 percent manual.
13. Voltage Transient Response: 20 percent load step plus/minus 4 percent; 30 percent load step plus/minus 5 percent; 50 percent load step; plus/minus 8 percent loss or return of AC input power plus/minus 1 percent; manual transfer of 100 percent load plus/minus 4 percent.
14. Transient Recovery Time: To within 1 percent of output voltage within 50 milliseconds.
15. Voltage Unbalance: Balanced load plus/minus 1 percent; 20 percent unbalanced load plus/minus 1 percent; 50 percent unbalanced load plus/minus 2 percent; 100 percent unbalanced load plus/minus 5 percent.
16. Fault Clearing: Sub-cycle current of at least 300 percent.
17. Harmonic Content: Maximum 5 percent RMS total. Maximum 3 percent any single harmonic.
2.2.10.2
Battery System: Battery discharge time to dropout 15 minutes. Overall efficiency – 85 percent minimum.
2.3 SOURCE QUALITY CONTROL:
2.3.1
Factory Tests: Before shipment, the manufacturer shall fully test the system to assure compliance with
the specification. These tests shall include operational discharge and recharge tests on at least a one-
minute battery plant to assure guaranteed rated performance.
PART 3 EXECUTION
3.1 EXAMINATION:
3.1.1
Examine conditions at the job site where work of this Section is to be performed to insure proper arrangement and fit of the work. Start of work implies acceptance of job site conditions.
3.2 PREPARATION:
3.2.1
Examine the Contract Drawings and specifications in order to insure the completeness of the work required under this Section.
3.2.2
Verify measurements and dimensions at the job site and cooperate in the coordination and scheduling of the work of this Section with the work of related trades so as not to delay job progress.
3.2.3
Provide templates as required to related trade for location of items.
3.3 INSTALLATION:
3.3.1
Install UPS system equipment and components as indicated, in accordance with equipment manufacturer’s written instructions, and under the direct supervision of the manufacturer’s field service engineer and with recognized industry practices to ensure that UPS system equipment complies with requirements. Comply with requirements of the applicable electrical code.
3.3.2
Engage battery manufacturer to provide constant on-site supervision of the battery and battery rack installation, testing and certification. Provide certification that the installation is in compliance with the battery manufacturer’s instructions, that the manufacturer is satisfied with installation, and that the manufacturer’s warranty is in effect. The battery and battery rack installation shall be in accordance with IEEE Standards 450 and 484 respectively and certified with tests witnessed by the Clients Representative. An infrared scan shall be part of the test. If any of the battery fails, the battery shall be disassembled as required, the problem corrected and tests rerun. The battery shall then be placed on a freshening charge under the supervision of the battery manufacturer’s technician. No battery loading or capacity testing shall be performed until the technician presents a written release indicating the battery is ready for service.
3.3.3
Provide housekeeping pad under uninterruptible power supply equipment as specified in Section 16010.
3.3.4
Grounding: Provide equipment grounding connections for UPS system as required and specified in Section 16161- Grounding and Bonding. Tighten connections to fulfill manufacturer’s torque requirements. If not manufacturer-provided, tighten connections to comply with tightening torque specified in UL Std 486A to assure permanent and effective grounds.
3.4 DEMONSTRATION:
3.4.1
Upon completion of installation of UPS system equipment, and after building circuitry has been energized
with normal power source, test UPS system, with manufacturer’s field service engineer present, to
demonstrate capability and compliance with test requirements, as specified below. Where possible,
correct malfunctioning units at site, then retest to demonstrate compliance; otherwise, remove and
replace with new units, and proceed with testing.
3.4.1.1
General:
a. Upon completion of the installation of the UPS system equipment, and after building circuitry has been energized with the normal power source, test UPS system, with manufacturer’s field service engineer present, to demonstrate capability and compliance with requirements, and that no damage or maladjustment has occurred during shipment.
b. Use calibrated instruments and full load rated load banks furnished by the manufacturer for testing.
c. Test the UPS system and components in accordance with the approved manufacturer’s detailed site acceptance test procedure and the following:
1. Initial Test: Operate the system at full resistive load continuously for a period of 48 hours. Continuously record UPS output voltage and frequency, input voltage, input current, output current of each phase, battery voltage and current. If system failure occurs within the test period, repeat tests after corrective action has been taken until 48 continuous hours of trouble-free testing are completed.
3.4.1.2
System Operational and Functional Tests: System operating controls, alarms, meters, mimic status lights, bypass transfer (automatic and manual), as well as controls and indicators shall be tested for proper operation.
3.4.1.3
Module Load Tests – Regulation and Load Sharing: The following shall be recorded during no-load and full system resistive load operation.
a. Input AC voltage, current, frequency (all three phases of rectifier).
b. Input AC voltage, current, frequency (all three phases of inverter, total system)
c. Output current in each phase of the module.
d. Battery voltage and current.
These tests shall be conducted twice: Utilizing normal power and utilizing emergency (backup) power.
3.4.1.4
3.4.1.5
Transient Tests: With the UPS systems operating at full resistive load, record the AC systems critical load output voltage on a high-speed oscillograph while performing the following tests:
a. No-load to 1/3 load and return.
b. 1/3 load to 2/3 load and return.
c. 2/3 load to 3/3 load and return.
d. 0 to 100 percent load and return.
e. Return the system on-line.
f. Remove and return the AC input power 5 times in succession at 3-second intervals (full UPS load).
g. Manually transfer the full load to the bypass line and return to UPS.
h. After restarting the system and applying full-load, actuate the emergency shutdown switch.
These tests shall be conducted twice. Utilizing normal power and utilizing emergency (backup) power.
3.4.2
Demonstrate operating procedures to Client’s personnel and provide written operating instructions with full explanation of technical information.
END OF SECTION
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