263353_-_UNINTERRUPTIBLE_POWER_SUPPLIES_-_AD1_0001.pdf

AUGUST 2021 UNINTERRUPTIBLE POWER SUPPLY

NIFC 300 – JWH UPS REPLACEMENT 263353 - 1

SECTION 263353 - STATIC UNINTERRUPTIBLE POWER SUPPLY

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Three-phase, on-line, double-conversion, static-type, UPS units with the following features:

a. Surge suppression.

b. Rectifier-charger.

c. Inverter.

d. Controls and indications.

e. Static bypass transfer switch.

f. Output distribution section.

g. Battery and battery disconnect device.

1.2 ACTION SUBMITTALS

A. Product Data: For each type of UPS.

B. Shop Drawings: For UPS.

1. Include plans, elevations, sections, and mounting details.

2. Include details of equipment assemblies. Indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.

3. Show access, workspace, and clearance requirements; details of control panels; and battery arrangement.

4. Include diagrams for power, signal, and control wiring.

1.3 INFORMATIONAL SUBMITTALS

A. Seismic Qualification Certificates: For UPS equipment, from manufacturer.

B. Product Certificates: For each product, from manufacturer.

C. UPS battery specifications.

D. Factory test reports.

E. Product test reports.

F. Field quality-control reports.

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G. Sample warranties.

1.4 CLOSEOUT SUBMITTALS

A. Operation and maintenance data.

B. UPS Testing/Commissioning Report.

C. Factory Acceptance Testing reports defined under “Source Quality Control” Article.

1.5 QUALITY ASSURANCE

A. Power Quality Specialist Qualifications: A registered professional electrical engineer or engineering technician, currently certified by the National Institute for Certification in

Engineering Technologies, NICET Level 4, minimum, experienced in performance testing UPS installations and in performing power quality surveys similar to that required in "Performance

Testing" Article.

B. Testing Agency Qualifications: Accredited by NETA.

1. Testing Agency's Field Supervisor: Certified by NETA to supervise on-site testing.

1.6 WARRANTY

A. Special Battery Warranties: Manufacturer and Installer agree to repair or replace UPS system storage batteries that fail in materials or workmanship within specified warranty period.

B. Special UPS Warranties: Specified form in which manufacturer and Installer agree to repair or replace components that fail in materials or workmanship within special warranty period.

1. Special Warranty Period: Two years from date of Substantial Completion.

PART 2 - PRODUCTS

2.1 OPERATIONAL REQUIREMENTS

A. Automatic operation includes the following:

1. Double Conversion, IGBT:

a. Normal Conditions: Load is supplied with power flowing from the normal power input terminals, through the rectifier-charger and inverter, with the battery connected in parallel with the rectifier-charger output. High-efficiency carrier stored trench IGBT, in both rectifier-charger and inverter circuits, provides a minimum of 97 percent efficiency for the UPS system at full load and a minimum of 94 percent efficiency at 50 percent load.

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b. Abnormal Supply Conditions: If normal supply deviates from specified and adjustable voltage, voltage waveform, or frequency limits, the battery supplies energy to provide constant, regulated inverter power output to the load.

c. Power Failure: If normal power fails, the rectifier-charger and inverter use energy from the battery to supply constant, regulated power output to the load without switching or disturbance.

2. When power is restored at the normal supply terminals of the system, controls shall automatically synchronize the inverter with the external source before transferring the load. The rectifier-charger shall supply power to the load through the inverter and simultaneously recharge the battery.

3. If the battery becomes discharged and normal supply is available, the rectifier-charger shall charge the battery. The rectifier-charger shall automatically shift to float-charge mode on reaching full charge.

4. If any element of the UPS system fails and power is available at the normal supply terminals of the system, the static bypass transfer switch shall switch the load to the normal ac supply circuit without disturbance or interruption.

5. The output power converters shall produce up to 150 percent of rated full-load current for short-circuit clearing. The inverter shall sustain steady-state overload conditions of up to

125 percent of rated full-load current for 60 seconds in normal operation.

6. The inverter shall be capable of sustaining 125 percent of system capacity for 30 seconds while powered from the battery.

7. Should overloads persist past the time limitations, the automatic static transfer switch shall switch the load to the bypass output of the UPS. When the fault has cleared, the static bypass transfer switch shall return the load to the UPS system.

8. If the battery is disconnected, the UPS shall supply power to the load from the normal supply with no degradation of its regulation of voltage and frequency of the output bus.

B. Manual operation includes the following:

1. Turning the inverter off causes the static bypass transfer switch to transfer the load directly to the normal ac supply circuit without disturbance or interruption.

2. Turning the inverter on causes the static bypass transfer switch to transfer the load to the inverter.

C. Operation of the Maintenance Bypass and Input Panels: The Maintenance Bypass switch is interlocked with the Maintenance Isolation switch so that at least one switch is open at all times.

This prevents paralleling the UPS output and the Bypass Input and allows the transformer to be disconnected from all sources of power when both switches are open. The Maintenance Bypass

Panel in conjunction with the Input Panel provides manual selection among the three conditions described below:

1. Full Isolation: Load is supplied by the Bypass Input, bypassing the UPS. Normal UPS ac input circuit, static bypass switch, and UPS load terminals are completely disconnected from external circuits.

2. Maintenance Bypass: Load is supplied, bypassing the UPS. UPS ac supply terminals are energized to permit operational checking, but system load terminals are isolated from the load.

3. Normal: Normal UPS ac supply terminals are energized and the load is supplied through the static bypass and the UPS rectifier-charger and inverter, or the battery and the inverter.

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D. Environmental Conditions: The UPS shall be capable of operating continuously in the following environmental conditions without mechanical or electrical damage or degradation of operating capability, except battery performance:

1. Ambient Temperature for Electronic Components: 32 to 104 deg F.

2. Ambient Temperature for Battery: 41 to 95 deg F.

3. Relative Humidity: Zero to 95 percent, noncondensing.

4. Altitude: Sea level to 3000 feet.

2.2 PERFORMANCE REQUIREMENTS

A. Seismic Performance: UPS shall withstand the effects of earthquake motions determined according to ASCE/SEI 7.

1. The term "withstand" means "the unit will remain in place without separation of any parts from the device when subjected to the seismic forces specified and the unit will be fully operational after the seismic event."

B. UL Compliance: Listed and labeled by an NRTL to comply with UL 1778.

C. NFPA Compliance: UPS components shall be listed and labeled by an NRTL as suitable for installation in computer rooms according to NFPA 75.

D. Output Rating: UPS shall have a continuous full load rating of 120 to 125 kVA at 480V 3-phase with a power factor of 1.0. UPS shall be capable of supplying loads with a power factor ranging from 0.8 leading to 0.8 lagging without derating.

E. The UPS shall perform as specified in this article while supplying rated full-load current, composed of any combination of linear and nonlinear load, up to 100 percent nonlinear load with a maximum load crest factor of 3.0, under the following conditions or combinations of the following conditions:

1. Inverter is switched to battery source.

2. Steady-state ac input voltage deviates up to plus or minus 10 percent from nominal voltage.

3. Steady-state input frequency deviates up to plus or minus 5 percent from nominal frequency.

4. THD of input voltage is 15 percent or more with a minimum crest factor of 3.0, and the largest single harmonic component is a minimum of 5 percent of the fundamental value.

5. Load is 50 percent unbalanced continuously.

F. Minimum Duration of Supply: If battery is sole energy source supplying 22.5 kVA at 80 percent power factor, duration of supply is 90 minutes. Total system capacity with 2 UPS units operating in parallel shall be no less than 45 kVA at 80 percent power factor for 90 minutes.

G. Input Voltage Tolerance: System steady-state and transient output performance remains within specified tolerances when steady-state ac input voltage varies plus 10 percent and minus 15 percent from nominal voltage.

Addendum 1

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H. Overall UPS Efficiency: Equal to or greater than 96 percent at 100 percent load, 96 percent at

75 percent load, and 95 percent at 25 percent load.

I. AC Output-Voltage Regulation for Loads 100 Percent Balanced: Maximum of plus or minus

1 percent over the full range of battery voltage.

J. Output Frequency: 60 Hz, plus or minus 0.1 percent over the full range of input voltage, load, and battery voltage.

K. Limitation of harmonic distortion of input current to the UPS shall be as follows:

1. Description: Rectifier-charger circuits shall limit THD to 5 percent, maximum, at rated full-load UPS current, for power sources with X/R ratio between 2 and 30. Provide tuned harmonic filter if required to meet harmonic distortion limit.

L. Maximum Harmonic Content of Output-Voltage Waveform: 1.5 percent rms at full rated output

(linear load) and 3 percent rms at full rated output (non-linear load).

M. Minimum Overload Capacity of UPS at Rated Voltage: 110 percent of rated full load for 10 minutes, 125 percent for 60 seconds in normal operation, and 125 percent for 30 seconds in battery operating mode.

N. Maximum Output-Voltage Transient Excursions from Rated Value: For the following instantaneous load changes, stated as percentages of rated full UPS load, voltage shall remain within stated percentages of rated value and recover to, and remain within, plus or minus 2 percent of that value within 50 ms:

1. 50 Percent: Plus or minus 3 percent.

2. 100 Percent: Plus or minus 5 percent.

3. Loss of AC Input Power: Plus or minus 1 percent.

4. Restoration of AC Input Power: Plus or minus 1 percent.

O. Input Power Factor: A minimum of 0.95 lagging when supply voltage and current are at nominal rated values and the UPS is supplying rated full-load current without additional filters.

P. Output Power Factor Rating: Loads with power factor of 0.9 leading to 0.8 lagging shall not require derating of the UPS. For loads with power factors outside this range, derate the UPS output as follows:

1. Derate the UPS a maximum of 5 percent for 0.7 PF lagging.

2. Derate the UPS a maximum of 10 percent for 0.6 PF lagging.

3. Derate the UPS a maximum of 15 percent for 0.5 PF lagging.

4. Derate the UPS a maximum of 20 percent for a range of 0.4 to 0.1 PF lagging.

Q. Storage batteries: Constructed of UL 1989 Recognized components with cycle service life of at least 200 cycles at 100% discharge.

R. EMI Emissions: Comply with FCC rules and regulations and with 47 CFR 15 for Class A equipment.

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2.3 UPS SYSTEMS

A. Description: Self-contained, battery backup device and accessories that provides three-phase electrical power in the event of failure or sag in the normal power system.

B. Electronic Equipment: Solid-state devices using hermetically sealed, semiconductor elements.

Devices include rectifier-charger, inverter, static bypass transfer switch, and system controls.

C. Enclosures: Comply with NEMA 250, Type 1, unless otherwise indicated.

D. Configuration: Multi-cabinet modular style units.

E. Control Assemblies: Mount on modular plug-ins, readily accessible for maintenance.

F. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.

G. Seismic-Restraint Design: UPS assemblies, subassemblies, and components (and fastenings and supports, mounting, and anchorage devices for them) shall be designed and fabricated to withstand static and seismic forces.

2.4 SURGE SUPPRESSION

A. Protect internal UPS components from surges that enter at each ac power input connection including main disconnect switch, static bypass transfer switch, and maintenance bypass/isolation switch. Protect rectifier-charger, inverter, controls, and output components.

1. Use factory-installed surge suppressors tested according to IEEE C62.41.1 and

IEEE C62.41.2.

2.5 RECTIFIER-CHARGER

A. Description: Voltage source converter, 6, 12 or 18 pulse rectifier.

B. Capacity: Adequate to supply the inverter during rated full output load conditions and simultaneously recharge the battery from fully discharged condition to 95 percent of full charge within 10 times the rated discharge time for duration of supply under battery power at full load.

C. Battery Float-Charging Conditions: Comply with battery manufacturer's written instructions for battery terminal voltage and charging current required for maximum battery life. The battery charger shall be matched to the battery type supplied.

2.6 INVERTER

A. Description: Pulse-width modulated with sinusoidal output.

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2.7 CONTROLS AND INDICATIONS

A. Network Communication:

1. Provide each UPS with communication module to send messages via SNMP trap on

Government’s IP network.

2. Provide database and graphics to enable Government’s existing Struxureware installation to display status of each UPS.

B. Description: Group displays, indications, and basic system controls on a common control panel on front of UPS enclosure.

C. Minimum displays, indicating devices, and controls include those in lists below. Provide sensors, transducers, terminals, relays, and wiring required to support listed items. Alarms include audible signals and visual displays.

D. Indications: Plain-language messages on a digital LCD.

1. Quantitative indications shall include the following:

a. Input voltage, each phase, line to line.

b. Input current, each phase, line to line.

c. Bypass input voltage, each phase, line to line.

d. Bypass input frequency.

e. System output voltage, each phase, line to line.

f. System output current, each phase.

g. System output frequency.

h. DC bus voltage.

i. Battery current and direction (charge/discharge).

j. Elapsed time discharging battery.

2. Basic status condition indications shall include the following:

a. Normal operation.

b. Load-on bypass.

c. Load-on battery.

d. Inverter off.

e. Alarm condition.

3. Alarm indications shall include the following:

a. Bypass ac input overvoltage or undervoltage.

b. Bypass ac input and inverter out of synchronization.

c. Bypass ac input single-phase condition.

d. Battery system alarm.

e. Control power failure.

f. Fan failure.

g. UPS overload.

h. Battery-charging control faulty.

i. Input overvoltage or undervoltage.

j. Input single-phase condition.

k. Approaching end of battery operation.

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l. Battery undervoltage shutdown.

m. Maximum battery voltage.

n. Inverter overtemperature.

o. Static bypass transfer switch overtemperature.

p. Inverter power supply fault.

q. Inverter output overvoltage or undervoltage.

r. UPS overload shutdown.

s. Inverter current sensor fault.

t. Inverter output contactor open.

u. Inverter current limit.

4. Controls shall include the following:

a. Inverter on-off.

b. UPS start.

c. Battery test.

d. Alarm silence/reset.

e. Output-voltage adjustment.

E. Dry-form "C" contacts shall be available for remote indication of the following conditions:

1. UPS on battery.

2. UPS on-line.

3. UPS load-on bypass.

4. UPS in alarm condition. Provide two additional Form C contacts, one for monitoring by existing fire alarm system and one for existing Johnson Controls building automation system.

5. UPS off (maintenance bypass closed).

F. Emergency Power off Switch: Capable of local operation and operation by means of activation by external dry contacts.

2.8 REMOTE MONITOR PANEL

A. Description: Remote Monitoring Device that includes a status display screen and a local audible alarm, allowing monitoring of the operational status and alarm condition of the UPS.

1. Location: Up to 300 feet from the UPS.

2. Display: Alarms, general state of the UPS and key metrics, such as battery charge and available runtime when on battery.

2.9 STATIC BYPASS TRANSFER SWITCH

A. Description: Solid-state switching device providing uninterrupted transfer with a contactor or electrically operated circuit breaker to automatically provide electrical isolation for the switch.

B. Switch Rating: Continuous duty at the rated full-load UPS current, minimum.

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2.10 SYSTEM STORAGE BATTERIES

A. Description: Valve Regulated Lead Acid (VRLA) with Absorbed Glass Mat (AGM) units with battery cabinet complete with battery disconnect switch.

B. Seismic-Restraint Design: Battery racks, cabinets, assemblies, subassemblies, and components

(and fastenings and supports, mounting, and anchorage devices for them) shall be designed and fabricated to withstand static and seismic forces.

2.11 BASIC BATTERY MONITORING

A. Description: Continuous, real-time capture of battery performance data.

B. Battery compartment high-temperature detector initiates an alarm when smoke or a temperature greater than 167 deg occurs within the compartment.

C. Annunciation of Alarms: At UPS control panel and remote monitor panel.

2.12 SOURCE QUALITY CONTROL

A. Factory test complete UPS system before shipment. Include the following:

1. Test and demonstration of all functions, controls, indicators, sensors, and protective devices.

2. Full-load test.

3. Transient-load response test.

4. Overload test.

5. Power failure test.

B. Report test results. Include the following data:

1. Description of input source and output loads used. Describe actions required to simulate source load variation and various operating conditions and malfunctions.

2. List of indications, parameter values, and system responses considered satisfactory for each test action. Include tabulation of actual observations during test.

3. List of instruments and equipment used in factory tests.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Examine areas and conditions, with Installer present, for compliance with requirements for conditions affecting performance of the UPS.

B. Comply with NECA 1.

C. Wiring Method: Install cables in raceways. Conceal raceway and cables except in unfinished spaces.

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1. Comply with requirements for raceways and boxes specified in Section 260533

"Raceways and Boxes for Electrical Systems."

D. Wiring Method: Conceal conductors and cables in accessible ceilings, walls, and floors where possible.

E. Wiring within Enclosures: Bundle, lace, and train conductors to terminal points with no excess and without exceeding manufacturer's limitations on bending radii. Install lacing bars and distribution spools.

F. Equipment Mounting: Install UPS on concrete slab.

1. Install dowel rods to connect concrete base to concrete floor. Unless otherwise indicated, install dowel rods on 18-inch centers around the full perimeter of concrete base 6 inches from the outer edge of the base.

2. For supported equipment, install epoxy-coated anchor bolts that extend through concrete base and anchor into structural concrete floor.

3. Place and secure anchorage devices. Use setting drawings, templates, diagrams, instructions, and directions furnished with items to be embedded.

4. Install anchor bolts to elevations required for proper attachment to supported equipment.

G. Maintain minimum clearances and workspace at equipment according to manufacturer's written instructions and NFPA 70.

H. Connections: Interconnect system components. Make connections to supply and load circuits according to manufacturer's wiring diagrams unless otherwise indicated. Apply oxide inhibitor on battery terminals.

I. Identify system components, wiring, cabling, and terminals. Comply with requirements for identification specified in Section 260553 "Identification for Electrical Systems."

1. Identify each battery cell individually.

3.2 GROUNDING

A. Comply with NFPA 70 requirements for connecting to existing grounding system. Comply with requirements in Section 260526 "Grounding and Bonding for Electrical Systems."

3.3 BATTERY EQUALIZATION

A. Equalize charging of battery cells if recommended by manufacturer, follow written instructions.

3.4 FIELD QUALITY CONTROL

A. Testing Agency: Owner will engage a qualified testing agency to perform tests and inspections.

B. Testing Agency: Engage a qualified testing agency to perform tests and inspections.

C. Perform tests and inspections with the assistance of a factory-authorized service representative.

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D. Tests and Inspections:

1. Inspect interiors of enclosures, including the following:

a. Inspect anchorage, alignment, grounding, and required clearances.

b. Component type and labeling verification.

c. Ratings of installed components.

2. Test electrical and mechanical interlock systems for correct operation and sequencing.

3. Inspect bolted electrical connections for high resistance using one or more of the following methods:

a. Use of low-resistance ohmmeter according to Section 7.22.2.2 of NETA ATS.

b. Verify tightness of accessible bolted electrical connections by calibrated torque-wrench method according to manufacturer's published data or Table 100.12 of

NETA ATS.

c. Perform thermographic survey according to Section 9 of NETA ATS.

4. Test static transfer from inverter to bypass and back. Use normal load, if possible.

5. Test dc undervoltage trip level on inverter input breaker. Set according to manufacturer's published data.

6. If present, verify synchronizing indicators for static switch and bypass switches.

7. Verify correct phase rotation in normal and bypass modes.

8. Test insulated-case and molded-case breakers.

a. Perform insulation-resistance tests for one minute on each pole, phase-to-phase and phase-to-ground with the circuit breaker closed, and across each open pole.

Apply voltage according to manufacturer's published data. In the absence of manufacturer's published data, use Table 100.1 of NETA ATS.

b. Perform insulation-resistance tests on all control wiring for ground. Applied potential shall be 500-V dc for 300-V rated cable and 1000-V dc for 600-V rated cable. Test duration shall be one minute. For units with solid-state components, follow manufacturer's recommendation.

c. Use primary current injection to determine long time and short time, ground fault, and instantaneous pickup, Use secondary current injection to test trip functions.

d. Perform minimum pickup voltage tests on shunt trip and close coils according to manufacturer's published data.

e. Verify operation of charging mechanism.

f. Verify correct operation of auxiliary features such as trip and pickup indicators, zone interlocking, electrical close and trip operation, trip-free, antipump function, and trip unit battery condition. Reset all trip logs and indicators.

9. Test automatic transfer switches.

a. Perform resistance measurements through bolted connections with a low-resistance ohmmeter, if applicable, according to Section 7.22.3.1 of NETA ATS.

b. Perform insulation-resistance tests on all control wiring for ground. Applied potential shall be 500-V dc for 300-V rated cable and 1000-V dc for 600-V rated cable. Test duration shall be one minute. For units with solid-state components or for control devices that cannot tolerate the applied voltage, follow manufacturer's recommendation.

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c. Perform a contact/pole-resistance test.

d. Verify settings and operation of control devices.

e. Calibrate and set all relays and timers according to Section 7.9 of NETA ATS.

f. Verify phase rotation, phasing, and synchronized operation as required by the application.

g. Perform automatic transfer tests.

1) Simulate loss of normal power.

2) Return to normal power.

3) Simulate loss of emergency power.

4) Simulate all forms of single-phase conditions.

h. Verify correct operation and timing of the following functions:

1) Normal source voltage-sensing and frequency-sensing relays.

2) Time delay on transfer.

3) Alternative source voltage-sensing and frequency-sensing relays.

4) Automatic transfer operation.

5) Interlocks and limit switch function.

6) Time delay and retransfer on normal power restoration.

10. Factory assembled battery systems transported and installed completely intact, without disassembly or removal of any component(s) are exempt from these testing requirements.

Battery systems assembled or installed in cabinets on-site shall be tested in accordance with the following requirements.

a. Verify adequacy of battery support racks, mounting, anchorage, alignment, grounding, and clearances.

b. Inspect spill containment installation. Measure charger float and equalizing voltage levels. Adjust to battery manufacturer's recommended settings.

c. Verify all charger functions and alarms.

d. Measure each cell voltage and total battery voltage with charger energized and in float mode of operation.

e. Perform a load test according to manufacturer's published data or IEEE 450.

f. Measure charger float and equalizing voltage levels. Adjust to battery manufacturer's recommended settings.

g. Test values.

1) Compare bolted connection resistance values to values of similar connections. Investigate values that deviate from those of similar bolted connections by more than 50 percent of the lowest value.

2) Charger float and equalize voltage levels shall be according to battery manufacturer's published data.

3) The results of charger functions and alarms shall be according to manufacturer's published data.

4) Cell voltages shall be within 0.05 V of each other or according to manufacturer's published data.

5) Compare bolted connection resistance values to values of similar connections. Investigate values that deviate from those of similar bolted connections by more than 50 percent of the lowest value.

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6) Cell internal ohmic values (resistance, impedance, or conductance) shall not vary by more than 25 percent between identical cells that are in a fully charged state.

7) Results of load tests shall be according to manufacturer's published data or

IEEE 450.

11. Test communication of status and alarms to remote monitoring equipment.

a. Simulate malfunctions to verify protective device operation.

b. Test duration of supply on emergency, low-battery voltage shutdown, and transfers and restoration due to normal source failure.

c. Test harmonic content of input and output current at 25, 50, and 100 percent of rated loads.

d. Test output voltage under specified transient-load conditions.

e. Test efficiency at 50, 75, and 100 percent of rated loads.

f. Test remote status and alarm panel functions.

g. Test battery-monitoring system functions.

E. Seismic-restraint tests and inspections shall include the following:

1. Inspect type, size, quantity, arrangement, and proper installation of mounting or anchorage devices.

2. Test mounting and anchorage devices according to requirements in Section 260548.16

"Seismic Controls for Electrical Systems."

F. The UPS system will be considered defective if it does not pass tests and inspections.

G. Record of Tests and Inspections: Maintain and submit documentation of tests and inspections, including references to manufacturers' written instructions and other test and inspection criteria.

Include results of tests, inspections, and retests.

H. Prepare test and inspection reports.

END OF SECTION 263353