SCO-23-25918-01A-Add #1.pdf

September 25, 2024

For: NCDIT – Western Data Center – UPS Replacement

SCO ID# 23-25918-01A

RECEIPT OF THIS ADDENDUM MUST BE NOTED ON THE BID FORM

ADDENDUM #1

TO ALL BIDDERS:

This addendum supplements and amends the original plans and specifications and shall be taken into account in the preparation of proposals and shall become part of the contract documents.

A. A pre bid site walk through was held at the NCDIT Western Data Center building on Wednesday September 11, at 2:00 pm.

B. Updated information is as follows:

• Sheet E0.1 o Noted that detail 1/E0.1 is applicable to Alternate E-1 only.

• Sheet E1.1 o Added additional notes for clarity.

• Specification 260500 o Added section 1.6.

• Specification 263353 o Modified sections 2.11 and 2.14.

o Modified section 3.1.H.

C. Questions and Responses:

1. The drawing set associated with this project indicates that the existing system is 4 wire + ground, 480Y/277. Please advise if the loads fed from the existing UPS systems require a 4 wire UPS, or if a 3 wire 480D UPS can be used to replace the existing systems

Response: A 3-wire 480V-delta UPS can be used for replacement, but additional labeling requirements are required for this system. Refer to Addendum #1 drawings.

Debbi Chez Stamp

2. Will a "spare battery" charger be needed for this project scope of work?

Response: No. UPS downtime will be limited and there will be no load on batteries when UPS is taken offline.

3. Will wall penetrations need individual holes for each conduit or can we utilize block outs/windows for our conduit run pathways?

Response: Existing walls are fire rated per the drawings and those ratings shall be maintained. Any penetrations through walls shall be properly sealed.

4. Is there a specific and/or alternate BMS Specifications?

Response: BMS is existing to remain. New UPS monitoring and new battery monitoring (if Alternate E-4 is accepted) shall be connected to existing BMS via modbus. Refer to Addendum #1 drawings.

5. Floor Plan and One-Line drawings state that the New UPS is Eaton 9395 series rated

675KVA/675KW. Page 6, "Form of Proposal" states that existing UPS is rated 750KVA/600KW. Please confirm Base Bid is to Replace Existing UPS with Eaton 9395 series UPS rated 675KVA/675KW NOT Eaton UPS equivalent to existing rated

750KVA/600KW?

Response: That is correct. Basis of design is Eaton 9395 series rated 675KVA/675KW. Other manufacturers are allowed per specifications.

6. Can the Prime Contractor’s onsite management be held by a triple hat position? One person filling the Superintendent, SSHO, and QC Manager Roles?

Response: This is acceptable if the triple hat position is held by someone with OSHA-30 certification. However, we reserve the right to require separate entities should deficiencies occur during construction.

D. Attachments:

1. Pre bid sign in attendance sheet from the site walk through 9/11/24.

2. Meeting Agenda/Minutes Used at the Pre-Bid site visit.

3. Existing underground conduit routing from as-builts.

4. Revised drawings E0.1 and E1.1.

5. Revised specifications 260500 and 263353.

END OF ADDENDUM #1

Meeting Agenda www.devitainc.com

877-4-DEVITA

corp@devitainc.com

Date: 09-11-2024

Sheet 1 and 2

Topic: Prebid Meeting

Meeting Date 09-11-2024

Time: 2:00P – 3:00P

Location: Western Data Center

Attendance: DIT o Tony Brackett - tony.brackett@nc.gov

DeVita o Travis Walker – Twalker@devitainc.com

Agenda:

1. Review Project Scope

a. Replace 3 existing 750KVA/600KW UPS Systems in the same location.

b. Existing feeders will be reused.

2. Alternates

#E-1: Install new UPS’s adjacent to existing units with new feeders and breakers.

Reuse existing maintenance bypass cabinets.

#E-2: Provide new maintenance bypass cabinets with the new UPS’s.

#E-3: Replace 400A breakers in existing UPS distribution panels.

#E-4a: Provide new VRLA battery system for each UPS system with minimum runtime of 9 minutes. Installation shall include new conduits and wiring, battery monitoring system connected to new UPS monitoring system, and functional testing. Existing batteries shall be palletized and turned over to the Owner. Refer to technical specifications for more information.

#E-4b: Provide new lithium-ion or lithium-iron-phosphate battery system for each

UPS system with minimum runtime of 9 minutes. Installation shall include new conduits and wiring, battery monitoring system connected to new UPS monitoring system, and functional testing. Existing batteries shall be palletized and turned over to Owner. Refer to technical specifications for more information.

3. Questions

a. We cannot provide responses to specific questions at this time by state bidding procedure.

b. The last day for questions will be Wednesday, September 18, 2024, so we can respond to them on the last Addendum 7 days before bid opening.

4. Project Schedule

a. Schedule for contract time of completion is 365 days from the NTP. NTP is expected to occur on or around Mid-October, but not guaranteed.

mailto:tony.brackett@nc.gov mailto:Twalker@devitainc.com

Meeting Agenda www.devitainc.com

877-4-DEVITA

corp@devitainc.com

5. Liquidated Damages

a. The contractor shall pay $1,000 per day beyond the construction calendar days of work not completed.

6. Bidding Forms

a. Sealed bid will be accepted at the Wester Data Center up until 2:00pm on

Wednesday, October 2, 2024.

b. Provide the completed Form of Proposal.

c. Provide the appropriate HUB forms as part of the bid package.

d. Provide bid bond as part of the bid package.

7. Site Visit

There was a site visit conducted.

DEVITA Project #23505 WESTERN DATA CENTER - UPS REPLACEMENT

SCO ID #23-25918-01A REBID SET - 8/22/2024 ADDENDUM #1

COMMON WORK RESULTS FOR ELECTRICAL 260500 - 1

SECTION 260500 - COMMON WORK RESULTS FOR ELECTRICAL

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section Includes:

1. Electrical equipment coordination and installation.

2. Sleeves for raceways and cables.

3. Sleeve seals.

4. Grout.

5. Common electrical installation requirements.

1.3 DEFINITIONS

A. EPDM: Ethylene-propylene-diene terpolymer rubber.

B. NBR: Acrylonitrile-butadiene rubber.

1.4 SUBMITTALS

A. Product Data: For sleeve seals.

1.5 COORDINATION

A. Interruption of Existing Electrical Service: Do not interrupt electrical service to facilities occupied by Owner or others unless permitted under the following conditions:

1. Notify Construction Manager and Owner no fewer than fourteen days in advance of proposed interruption of electrical service.

2. Electrical service interruptions shall only occur on weekends. Coordinate exact timing and limitations with owner.

3. Do not proceed with interruption of electrical service without Construction Manager's and Owner's written permission.

4. Coordinate interruption with systems impacted by outage including, but not limited to, the following:

a. Exercising generators.

b. Emergency lighting.

SCO ID #23-25918-01A REBID SET - 8/22/2024 Addendum #1

COMMON WORK RESULTS FOR ELECTRICAL 260500 - 2

c. Elevators.

d. Fire-alarm systems.

e. UPS.

B. Coordinate arrangement, mounting, and support of electrical equipment:

1. To allow maximum possible headroom unless specific mounting heights that reduce headroom are indicated.

2. To provide for ease of disconnecting the equipment with minimum interference to other installations.

3. To allow right of way for piping and conduit installed at required slope.

4. So connecting raceways, cables, wireways, cable trays, and busways will be clear of obstructions and of the working and access space of other equipment.

C. Coordinate installation of required supporting devices and set sleeves in cast-in-place concrete, masonry walls, and other structural components as they are constructed.

D. Coordinate location of access panels and doors for electrical items that are behind finished surfaces or otherwise concealed.

E. Coordinate sleeve selection and application with selection and application of firestopping.

F. All work shall be tested and inspected. Coordinate testing dates and requirements with the architect and engineer. All tests and inspections shall be scheduled in advance. The State Electrical Inspector is the Authority Having Jurisdiction for electrical inspections. It is the responsibility of the electrical contractor to notify the Office of the State Electrical Inspector to schedule required inspections including rough-in, above ceiling and final inspections.

1.6 QUALIFICATIONS

A. Persons installing electrical equipment are required to have previous experience with UPS infrastructure projects. A minimum of two previous projects that include static uninterruptible power supplies that are rated 500KW or more is recommended.

PART 2 - PRODUCTS

2.1 SLEEVES FOR RACEWAYS AND CABLES

A. Steel Pipe Sleeves: ASTM A 53/A 53M, Type E, Grade B, Schedule 40, galvanized steel, plain ends.

B. Cast-Iron Pipe Sleeves: Cast or fabricated "wall pipe," equivalent to ductile-iron pressure pipe, with plain ends and integral waterstop, unless otherwise indicated.

C. Sleeves for Rectangular Openings: Galvanized sheet steel.

1. Minimum Metal Thickness:

SCO ID #23-25918-01A REBID SET - 8/22/2024 ADDENDUM #1

COMMON WORK RESULTS FOR ELECTRICAL 260500 - 3

a. For sleeve cross-section rectangle perimeter less than 50 inches (1270 mm) and no side more than 16 inches (400 mm), thickness shall be 0.052 inch (1.3 mm).

b. For sleeve cross-section rectangle perimeter equal to, or more than, 50 inches (1270

mm) and 1 or more sides equal to, or more than, 16 inches (400 mm), thickness shall be 0.138 inch (3.5 mm).

2.2 SLEEVE SEALS

1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

a. Advance Products & Systems, Inc.

b. Calpico, Inc.

c. Metraflex Co.

d. Pipeline Seal and Insulator, Inc.

2. Sealing Elements: EPDM interlocking links shaped to fit surface of cable or conduit.

Include type and number required for material and size of raceway or cable.

3. Pressure Plates: Stainless steel. Include two for each sealing element.

4. Connecting Bolts and Nuts: Stainless steel of length required to secure pressure plates to sealing elements. Include one for each sealing element.

2.3 GROUT

A. Nonmetallic, Shrinkage-Resistant Grout: ASTM C 1107, factory-packaged, nonmetallic aggregate grout, noncorrosive, non-staining, mixed with water to consistency suitable for application and a 30-minute working time.

PART 3 - EXECUTION

3.1 COMMON REQUIREMENTS FOR ELECTRICAL INSTALLATION

A. Comply with NECA 1.

B. Comply with NFPA 70E.

C. Comply with the Energy Independence and Security Act, effective date January 1, 2009.

D. Comply with the latest edition of the National Electrical Code, all state code requirements, and State Electrical Inspector and State Fire Alarm Inspector.

E. Measure indicated mounting heights to bottom of unit for suspended items and to center of unit for wall-mounting items.

F. Headroom Maintenance: If mounting heights or other location criteria are not indicated, arrange and install components and equipment to provide maximum possible headroom consistent with these requirements.

COMMON WORK RESULTS FOR ELECTRICAL 260500 - 4

G. Equipment: Install to facilitate service, maintenance, and repair or replacement of components of both electrical equipment and other nearby installations. Connect in such a way as to facilitate future disconnecting with minimum interference with other items in the vicinity.

H. Right of Way: Give to piping systems installed at a required slope.

3.2 SLEEVE INSTALLATION FOR ELECTRICAL PENETRATIONS

A. Electrical penetrations occur when raceways, cables, wireways, cable trays, or busways penetrate concrete slabs, concrete or masonry walls, or fire-rated floor and wall assemblies.

B. Concrete Slabs and Walls: Install sleeves for penetrations unless core-drilled holes or formed openings are used. Install sleeves during erection of slabs and walls.

C. Use pipe sleeves unless penetration arrangement requires rectangular sleeved opening.

D. Fire-Rated Assemblies: Install sleeves for penetrations of fire-rated floor and wall assemblies unless openings compatible with firestop system used are fabricated during construction of floor or wall.

E. Cut sleeves to length for mounting flush with both surfaces of walls.

F. Extend sleeves installed in floors 2 inches (50 mm) above finished floor level.

G. Size pipe sleeves to provide 1/4-inch (6.4-mm) annular clear space between sleeve and raceway or cable, unless indicated otherwise.

H. Seal space outside of sleeves with grout for penetrations of concrete and masonry

1. Promptly pack grout solidly between sleeve and wall so no voids remain. Tool exposed surfaces smooth; protect grout while curing.

I. Interior Penetrations of Non-Fire-Rated Walls and Floors: Seal annular space between sleeve and raceway or cable, using joint sealant appropriate for size, depth, and location of joint.

J. Fire-Rated-Assembly Penetrations: Maintain indicated fire rating of walls, partitions, ceilings, and floors at raceway and cable penetrations. Install sleeves and seal raceway and cable penetration sleeves with firestop materials.

K. Roof-Penetration Sleeves: Seal penetration of individual raceways and cables with flexible boot-type flashing units applied in coordination with roofing work.

L. Aboveground, Exterior-Wall Penetrations: Seal penetrations using cast-iron pipe sleeves and mechanical sleeve seals. Select sleeve size to allow for 1-inch (25-mm) annular clear space between pipe and sleeve for installing mechanical sleeve seals.

M. Underground, Exterior-Wall Penetrations: Install cast-iron pipe sleeves. Size sleeves to allow for 1-inch (25-mm) annular clear space between raceway or cable and sleeve for installing mechanical sleeve seals.

COMMON WORK RESULTS FOR ELECTRICAL 260500 - 5

3.3 SLEEVE-SEAL INSTALLATION

A. Install to seal exterior wall penetrations.

B. Use type and number of sealing elements recommended by manufacturer for raceway or cable material and size. Position raceway or cable in center of sleeve. Assemble mechanical sleeve seals and install in annular space between raceway or cable and sleeve. Tighten bolts against pressure plates that cause sealing elements to expand and make watertight seal.

3.4 FIRESTOPPING

A. Apply firestopping to penetrations of fire-rated floor and wall assemblies for electrical installations to restore original fire-resistance rating of assembly.

END OF SECTION 260500

SCO ID #23-25918-01A REBID SET - 8/22/2024 ADDENDUM #1

STATIC UNINTERRUPTIBLE POWER SUPPLY 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. 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. Product Certificates: For each product, from manufacturer.

B. Factory test reports.

1.4 CLOSEOUT SUBMITTALS

A. Operation and maintenance data.

1.5 QUALITY ASSURANCE

A. Testing Agency Qualifications: Accredited by NETA.

STATIC UNINTERRUPTIBLE POWER SUPPLY 263353 - 2

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

1.6 WARRANTY

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

1. Warranty Period: Two years from date of Final Acceptance.

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.

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 300 percent of rated full-load current for short-circuit clearing. The inverter shall sustain steady-state overload conditions of up to 200 percent of rated full-load current for 60 seconds in normal operation.

6. The inverter shall be capable of sustaining 150 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.

STATIC UNINTERRUPTIBLE POWER SUPPLY 263353 - 3

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. Maintenance Bypass/Isolation Switch Operation: Switch is interlocked so it cannot be operated unless the static bypass transfer switch is in the bypass mode. Device provides manual selection among the three conditions described below without interrupting supply to the load during switching:

1. Full Isolation: Load is supplied, bypassing the UPS. Normal UPS ac input circuit, static bypass transfer 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 transfer switch and the UPS rectifier-charger and inverter, or the battery and the inverter.

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 (0 to 40 deg C).

2. Ambient Temperature for Battery: 41 to 95 deg F (5 to 35 deg C).

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

4. Altitude: Sea level to 4000 feet (1220 m).

2.2 PERFORMANCE REQUIREMENTS

A. UL Compliance: Listed and labeled by a qualified testing agency to comply with UL 1778.

Third party agencies shall be amongst those accredited by the NCBCC (North Carolina Building Code Council) to Label Electrical & Mechanical Equipment.

B. 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 12 percent from nominal voltage.

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

STATIC UNINTERRUPTIBLE POWER SUPPLY 263353 - 4

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 30 percent unbalanced continuously.

C. Minimum Duration of Supply: If battery is sole energy source supplying rated full-load UPS current at 98 percent power factor, duration of supply is 9 minutes.

D. 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 20 percent from nominal voltage.

E. Overall UPS Efficiency: Equal to or greater than 99 percent at 100 percent load, 98 percent at 75 percent load, and 94 percent at 25 percent load.

F. Maximum Energizing Inrush Current: Eight times the full-load current.

G. AC Output-Voltage Regulation for Loads 100 Percent Unbalanced: Maximum of plus or minus 2 percent over the full range of battery voltage.

H. AC Output-Voltage Regulation for Loads 100 Percent Balanced: Maximum of plus or minus 1 percent over the full range of battery voltage.

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

J. 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.

K. Maximum Harmonic Content of Output-Voltage Waveform: 5 percent rms total and 3 percent rms for any single harmonic, for rated full load with THD up to 50 percent, with a load crest factor of 3.0.

L. Minimum Overload Capacity of UPS at Rated Voltage: 125 percent of rated full load for 10 minutes, 200 percent for 60 seconds in normal operation, and 150 percent for 30 seconds in battery operating mode.

M. 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.

N. 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.

STATIC UNINTERRUPTIBLE POWER SUPPLY 263353 - 5

O. 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.

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

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. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

1. ABB, Electrification Business.

2. APC by Schneider Electric.

3. Eaton.

4. Mitsubishi Electric Automation, Inc.

5. Staco Energy Products Co.

6. Toshiba International Corporation.

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

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

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

E. Configuration: Field-assembled, multicabinet modular style units.

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

G. 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. Third party agencies shall be amongst those accredited by the NCBCC (North Carolina Building Code Council) to Label Electrical & Mechanical Equipment.

H. Output Circuit Neutral Bus, Conductor, and Terminal Ampacity: Rated phase current times a multiple of 1.73, minimum.

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.

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STATIC UNINTERRUPTIBLE POWER SUPPLY 263353 - 6

1. Use factory-installed surge suppressors tested according to IEEE C62.41.1 and IEEE C62.41.2, Category B.

2. Additional Surge Protection: Protect internal UPS components from low-frequency, high-energy voltage surges described in IEEE C62.41.1 and IEEE C62.41.2. Design the circuits connecting with external power sources and select circuit elements, conductors, conventional surge suppressors, and rectifier components and controls so input assemblies will have adequate mechanical strength and thermal and current-carrying capacity to withstand stresses imposed by 400-Hz, 180 percent voltage surges described in IEEE C62.41.1 and IEEE C62.41.2.

2.5 RECTIFIER-CHARGER

A. Description: Voltage source converter, 12-pulse IGBT 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. Output Ripple: Limited by output filtration to less than 0.5 percent of rated current, peak to peak.

D. Control Circuits: Immune to frequency variations within rated frequency ranges of normal and emergency power sources.

1. Response Time: Field adjustable for maximum compatibility with local generator-set power source.

E. 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.

F. NiCd Battery Charger: Sense full charge by measuring the rate of temperature increase. Battery charging shall be terminated when the rate of temperature rise reaches 1.8 deg F (1 deg C) per minute. If the battery reaches 140 deg F (60 deg C) prior to reaching this rate of temperature rise, charging shall terminate. Chargers that determine full charge by voltage measurement to sense a 10-mV drop per cell when reaching full charge are also acceptable.

2.6 INVERTER

A. Description: Pulse-width modulated, carrier stored trench IGBT with sinusoidal output. Include a bypass phase synchronization window adjustment to optimize compatibility with local engine-generator-set power source.

2.7 CONTROLS AND INDICATIONS

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

STATIC UNINTERRUPTIBLE POWER SUPPLY 263353 - 7

B. 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.

C. 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 overfrequency or underfrequency.

c. Bypass ac input and inverter out of synchronization.

d. Bypass ac input wrong-phase rotation.

e. Bypass ac input single-phase condition.

f. Bypass ac input filter fuse blown.

g. Internal frequency standard in use.

h. Battery system alarm.

i. Control power failure.

j. Fan failure.

k. UPS overload.

l. Battery-charging control faulty.

m. Input overvoltage or undervoltage.

n. Input transformer overtemperature.

o. Input circuit breaker tripped.

p. Input wrong-phase rotation.

q. Input single-phase condition.

r. Approaching end of battery operation.

s. Battery undervoltage shutdown.

t. Maximum battery voltage.

u. Inverter fuse blown.

v. Inverter transformer overtemperature.

STATIC UNINTERRUPTIBLE POWER SUPPLY 263353 - 8

w. Inverter overtemperature.

x. Static bypass transfer switch overtemperature.

y. Inverter power supply fault.

z. Inverter transistors out of saturation.

aa. Identification of faulty inverter section/leg.

bb. Inverter output overvoltage or undervoltage.

cc. UPS overload shutdown.

dd. Inverter current sensor fault.

ee. Inverter output contactor open.

ff. 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.

D. 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.

5. UPS off (maintenance bypass closed).

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

2.8 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.

C. Input SPD: 160 kA.

2.9 MAINTENANCE BYPASS/ISOLATION SWITCH

A. Description: Manually operated switch or arrangement of switching devices with mechanically actuated contact mechanism arranged to route the flow of power to the load around the rectifier-charger, inverter, and static bypass transfer switch.

1. Switch must be electrically and mechanically interlocked to prevent interrupting power to the load when switching to bypass mode.

2. Switch must electrically isolate other UPS components to permit safe servicing.

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3. Switch must electrically isolate the rectifier-charger, inverter, and static bypass transfer switch from the load, but must allow primary power to the UPS for testing.

B. Comply with NEMA PB 2 and UL 891.

C. Switch Rating: Continuous duty at rated full-load UPS current.

2.10 REMOTE STATUS AND ALARM PANEL

A. Description: Labeled LEDs on panel faceplate indicating five basic status conditions. Audible signal indicates alarm conditions. Silencing switch in face of panel silences signal without altering visual indication.

1. Cabinet and Faceplate: Surface or flush mounted to suit mounting conditions indicated.

2.11 REMOTE MONITORING

A. Description: Communication module in unit control panel provides capability for remote monitoring of status, parameters, and alarms specified in "Controls and Indications" Article.

Include the following features:

1. System shall be BACNET and MODBUS compatible.

2. Connectors and network interface units for data transmission via TIA-485, Ethernet, or web-based link.

3. Software designed for control and monitoring of UPS functions and to provide on-screen explanations, interpretations, diagnosis, action guidance, and instructions for use of monitoring indications and development of meaningful reports. Permit storage and analysis of power-line transient records.

2.12 BATTERY

A. Description: Valve-regulated, heavy-duty, industrial, recombinant, pocket plate design, NiCd units in polypropylene containers, complete with battery disconnect switch and intercell connectors.

1. Mount on three-tier, acid-resistant, painted steel racks.

2.13 BASIC BATTERY MONITORING

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

B. Battery Ground-Fault Detector: Initiates alarm when resistance to ground of positive or negative bus of battery is less than 5000 ohms.

C. Battery compartment high-temperature detector initiates an alarm when smoke or a temperature greater than 167 deg F (75 deg C) occurs within the compartment.

D. Annunciation of Alarms: At UPS control panel and remotely.

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2.14 ADDITIONAL BATTERY MONITORING

A. Monitoring features and components must include the following:

1. Factory-wired sensing leads to cell and battery terminals and cell temperature sensors.

2. Connections for data transmission via TIA-485 link, and network interface and external signal wiring to electrical power monitoring and control equipment.

3. USB ports for printer and accessories.

4. System shall be BACNET and MODBUS compatible.

B. Operation: Automatically measure and electronically record the following parameters on a routine schedule and during battery discharge events. During discharge events, record measurements timed to nearest second; including measurements of the following parameters:

1. Total battery voltage and ambient temperature.

2. Individual-cell voltage, impedance, and temperature, and string current. During battery-discharging events such as utility outages, measures battery and cell voltages, battery string current and records values versus time to nearest second.

2.15 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 and cable trays except within consoles, cabinets, desks, and counters. 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 base.

1. Install dowel rods to connect concrete base to concrete floor. Unless otherwise indicated, install dowel rods on 18-inch (450-mm) centers around the full perimeter of concrete base 6 inches (150 mm) 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.

1. Make connections to supply and load circuits according to manufacturer's wiring diagrams unless otherwise indicated.

2. Apply oxide inhibitor on battery terminals.

3. Make connections from monitoring panels to existing BMS system via Modbus according to owner requirements.

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. Separately Derived Systems: If not part of a listed power supply for a data-processing room, comply with NFPA 70 requirements for connecting to grounding electrodes and for bonding to metallic piping near isolation transformer. Comply with requirements in Section 260526 "Grounding and Bonding for Electrical Systems."

3.3 IDENTIFICATION

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

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3.4 BATTERY EQUALIZATION

A. Equalize charging of battery cells according to manufacturer's written instructions. Record individual-cell voltages.

3.5 FIELD QUALITY CONTROL

A. Comply with requirements for testing specified in Section 019116 "Electrical Functional Testing Requirements."

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

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

5. Verify synchronizing indicators for static switch and bypass switches.

6. 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.

7. 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

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for control devices that cannot tolerate the applied voltage, follow manufacturer's recommendation.

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.

8. Test direct current system's batteries.

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.

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

10. Load the system using a variable-load bank to simulate kilovolt amperes, kilowatts, and power factor of loads for unit's rating. Use instruments calibrated within the previous six months according to NIST standards.

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.

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

D. 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.

E. Prepare test and inspection reports.

3.6 DEMONSTRATION

A. Train Owner's maintenance personnel to adjust, operate, and maintain the UPS.

END OF SECTION 263353