State of Maine, 19 Union Street Data Center

Integrated Design Group, Inc.

Section 26 26 00p – Power Distribution Units - Purchase

Project 1101101 26 26 00p - 1 Pre-purchase 02/24/12

SECTION 26 26 00p

POWER DISTRIBUTION UNITS – PURCHASE

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Manufacturers

2. Manufactured Units

3. Input-Power, Circuit-Breaker Section

4. Isolation Transformer Section

5. SPD System

6. Output Panelboards

7. Power Distribution Unit Controls

8. Monitoring, Status, and Alarm Annunciation

9. Sound Level

10. Finishes

11. Stands

12. Source Quality Control

13. Electrical General Commissioning Requirements. Provide Manufacturer’s support as required to coordinate with the Commissioning Agent and support all commissioning efforts and paperwork, Acceptance with Integrated Systems Testing.

B. Meet the following performance requirements:

1. Environmental Conditions: Units shall be capable of operating continuously in the following environmental conditions without mechanical or electrical damage or degradation of operating capability.

a. Storage Temperature Range: Minus 67 to plus 185 deg F (Minus 55 to plus 85 deg C).

b. Operating Temperature Range: 32 to 104 deg F (0 to 40 deg C).

c. Relative Humidity Range: 0 to 95 percent, noncondensing.

d. Altitude: Sea level to 3600 feet (1100 m) above sea level.

2. Wind, snow, ice, flood and earthquake Performance: In accordance with Section 26 00 09p -1.5.

3. Energy efficiency

a. AGMA TP1

b. CSL-3

4. Harmonic Mitigating

5. Transformer

a. KVA: 150

6. Input

a. 480V, 3PH

b. Single Main Circuit Breaker

7. Output

a. 208/120V, 3PH, 4W.

b. 2 – 225A subfeed circuit breakers

c. 2 – 250A frame prepared spaces to accommodate future circuit breakers.

8. Cabling

a. Supply: Top or bottom feed

b. Load: Top feed

9. Access: the entire line up shall require front access only

C. System Description:

Section 26 26 00p – Power Distribution Units - Purchase

Project 1101101 26 26 00p - 2 Pre-purchase 02/24/12

1. Provide four (4) PDU’s as indicated on one-line diagram

2. Integrated Isolation Transformer with distribution capabilities and power conditioning.

3. This section includes the technical requirements for Power Distribution units as described here in and on the Drawings.

a. The PDU shall be designed to supply computer grade power to data processing equipment. The power equipment specified herein shall provide complete isolation, distribution, control, and monitoring of AC power. The PDU shall include everything required to correctly interface the uninterruptible power source to its intended load.

4. Logic circuits, metering and instrumentation devices to control PDU functions, measure specified PDU electrical characteristics, display specified PDU parameters, and provide the capability of transmitting performance to a remote location shall be provided.

1.2 RELATED WORK

A. Section 26 00 09p – Basic electrical requirements, is an integral part of this section.

Requirements and work indicated in 26 00 09p are not repeated in this Section.

1.3 COORDINATION

A. Coordinate work under provisions indicated in Section 26 00 09p.

1.4 QUALIFICATIONS / QUALITY ASSURANCE

A. Conform to requirements indicated in Section 26 00 09p.

B. The following specific requirements shall be adhered to fully:

1. Deliver the PDU equipment and components properly packaged and mounted on pallets, or skids to facilitate handling of heavy items. Delivery should be coordinated with the Installer to coincide with the area of final installation being ready to accept the equipment.

Shipping sections shall not exceed 60”W x 42”D x 82”H, to facilitate handling.

2. The equipment shall be covered with clear plastic sheeting to prevent dust and dirt from entering the equipment during shipment and storage.

3. Handle the equipment carefully to prevent physical damage to any one of its components.

Do not install damaged equipment; remove from site and replace with new.

4. The equipment shall be covered with clear plastic sheeting to prevent dust and dirt from entering the equipment during shipment and storage.

1.5 REGULATORY REQUIREMENTS AND STANDARDS

A. Conform to requirements indicated in Section 26 00 09p in addition to following:

1. Energy Policy Act of 2005 (EPACT 2005)

1.6 SUBMITTALS

A. Submit as required here in and under Section 26 00 09p.

B. Submit support and bolting or securing requirements needed to meet the performance requirements of paragraph 1.1B.

C. Submit transformer efficiency curves at various loading levels.

D. Submit no-load loss of transformer.

E. Submit on maximum inrush rating transformer at 0.1 seconds.

1.7 EXTRA MATERIALS

A. Furnish under provisions indicated in Section 26 00 09p.

Section 26 26 00p – Power Distribution Units - Purchase

Project 1101101 26 26 00p - 3 Pre-purchase 02/24/12

B. Provide the following additional materials:

1. Provide 10% of quantity installed, but not less than two, of the following items for replacement purposes:

a. Fiberglass air filters

b. Control power transformers

c. Pilot light lamps

d. Pilot light lens (of each color used)

e. Fuses (of each size installed)

f. Removable operating handles.

g. Instrument testing plugs.

2. Provide two (2) spare 208V molded-case, bolt on, automatic circuit breaker match output sub-feed breaker.

1.8 PROJECT RECORD DOCUMENTS

A. Submit under provisions indicated in Section 26 00 09p.

1.9 OPERATION AND MAINTENANCE DATA

A. Submit under provisions indicated in Section 26 00 09p.

1.10 WARRANTY

A. Provide under provisions indicated in Section 26 00 09p.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Manufacturers: Subject to compliance with requirements, provide products by the manufacturer specified:

1. Easton Power Ware.

2. Liebert Corporation; a division of Emerson.

3. Power Distribution, Inc.

4. MGE, Inc.

2.2 MANUFACTURED UNITS

A. Description: Integrated and coordinated assembly of power-line-conditioning and distribution components packaged in a single cabinet or modular assembly of cabinets each with full-swivel casters mounted to bottom frame. Include the following components:

1. Input-power, circuit-breaker section.

2. Isolation transformer.

3. SPD system.

4. Output sub-feed circuit breakers.

5. Alarm, monitoring, and control system.

B. Provide units that are constructed to withstand seismic forces specified in Section 26 00 09p.

C. Unit Capacity Rating: Unit shall carry indicated RMS kilovolt-ampere load continuously without exceeding rated insulation temperature for the following input voltage and load current:

1. Input Voltage: Within rated input-voltage tolerance band of unit.

2. Load Current: Minimum of 3.0 crest factor and 85 percent total harmonic distortion.

Section 26 26 00p – Power Distribution Units - Purchase

Project 1101101 26 26 00p - 4 Pre-purchase 02/24/12

2.3 INPUT-POWER, CIRCUIT-BREAKER SECTION

A. Description: 3-pole, shunt-tripped, thermal-magnetic-type circuit breaker, rated for indicated interrupting capacity and 125 percent of input current of unit at 100 percent rated load.

2.4 ISOLATION TRANSFORMER SECTION

A. Description: Dry-type, electrostatically shielded, three-phase, common-core, convection-air-cooled isolation transformer.

1. Comply with UL 1561 including requirements for nonsinusoidal load-current-handling capability defined by designated K-factor.

2. Cores: Grain-oriented, non-aging silicon steel, one leg per phase.

3. Coil Material and Insulation: Copper windings with a 220 deg C insulation class.

4. Temperature Rise: Designed for 150 deg C rise above 40 deg C ambient.

5. Output Impedance: 3.5 plus or minus 0.5 percent.

6. Regulation: 2 to 4 percent maximum, at full-resistive load; 5 percent maximum, at rated nonlinear load.

7. Taps: 6 full-capacity compensation taps at 2.5 percent increments; 2 above and 4 below nominal voltage.

8. Full-Load Efficiency: Minimum 96 percent at rated nonlinear load. Comply with NEMA

TP1 at 35% load.

9. Magnetic-Field Strength External to Transformer Enclosure: Less than 0.1 gauss at 450 mm.

10. Audible Noise: Comply with NEMA ST 20.

11. Electrostatic Shielding: Independently shield each winding with a double-copper, electrostatic shield arranged to minimize interwinding capacitance.

a. Coil leads and terminal trips shall be arranged to minimize capacitive coupling between input and output connections.

b. Shield Terminal: Separate, and marked "Shield" for grounding connection.

c. Capacitance: Limit capacitance between primary and secondary windings to a maximum of 33 picofarads over a frequency range of 20 Hz to 1 MHz.

d. Common-Mode Noise Attenuation: 120 dB minimum, 0.5 to 1.5 kHz; minus 65 dB minimum, 1.5 to 100 kHz.

e. Normal-Mode Noise Attenuation: Minus 52 dB minimum, 1.5 to 10 kHz.

12. Neutral Rating: 1.732 times the system full-load ampere rating.

13. Maximum in rush current at 0.1 seconds: Not to exceed 12X full load current rating of the transformer.

2.5 SPD SYSTEM

A. Description: Integrated SPD system to protect unit panelboard, and having the following features:

1. Disconnect Device: Manual, three-pole, fused disconnect switch to de-energize SPD system while permitting power distribution units to continue operation. Fuses are rated at 200-kA interrupting capacity.

2. Nonlinear Loading: System shall accommodate rated-load current with a minimum 3.0 crest factor and 85 percent total harmonic distortion.

3. Locate and isolate SPD so a failure will not effect the continued operation of the PDU.

B. Input Lightning/Surge Arrester

1. The specified unit shall be equipped with a secondary-class surge arrester to divert high-voltage input power surges quickly and safely to ground. The surge arrester shall be mounted ahead of all electrical components to provide maximum protection of the unit insulation and wiring. The surge arrester shall be capable of repeated operations. It shall consist of utility-grade metal-oxide varistors rated for up to 20,000 amps of surge current.

The surge arrester shall be rated for maximum FOW sparkover of 3200 volts with

Section 26 26 00p – Power Distribution Units - Purchase

Project 1101101 26 26 00p - 5 Pre-purchase 02/24/12 maximum discharge voltage of 2.2 kV at 1500 amperes, assuming a standard 8 x 20 microsecond waveform.

C. High Energy Output Surge Suppression

1. The unit shall be equipped with a high energy, UL1449 and UL1283 listed, Transient Voltage Surge Suppression (TVSS) module connected to the unit output with minimal interconnecting wiring for maximum surge suppression. The TVSS shall consist of multiple, gapless Metal Oxide Varistor (MOV) arrays with their clamping voltages matched to within 1%. Each MOV shall be individually fused to protect against MOV failure while still allowing maximum rated surge current to flow without fuse operation. The fuses shall have a 100 kA interrupting capacity. Each array shall be capable of withstanding at least 1250 IEEE C62:41 category C3 surges (20 kV, 10 kA) without failure. The complete TVSS module shall have a total surge current capacity of 80 kA per phase based on a standard 8 x 20 microsecond surge waveform. The UL1449 surge clamping rating shall not exceed 400 volts for a 120/208 volt system. The maximum continuous operating voltage shall be at least 150 VAC for a 120/208 volt system. The TVSS shall also provide electrical noise attenuation of 50 dB from 100 kHz to 100 MHz (based on MIL220A and 50 OHM impedance). An alarm contact of the TVSS module shall be connected to the unit monitoring system to annunciate any TVSS failure.

2.6 OUTPUT DISTRIBUTION

A. Description: Sub feed fixed mount molded case circuit breakers of rating and capacity as indicated on the drawings. In no case shall the circuit breaker interrupting rating be lower than the maximum short circuit current available from the transformer secondary. Mount in front of power distribution units behind flush doors. Include the following features:

1. Current Rating: 225 A

2. Chassis Phase, Neutral and Ground Buses: Copper, with neutral bus at least 1.732 times the nominal phase bus rating.

3. Equipment Ground Bus: Copper, adequate for branch-circuit equipment ground conductors; insulated from supports.

4. Cable Racks: Removable and arranged for supporting and routing cables for panelboard entrance.

5. Access Panels: Arranged so additional feeder-circuit wiring can be installed and connected in the future.

6. Shunt Trip: All PDU sub-feed circuit breakers shall be equipped with 120V shut trip accessories. These accessories shall be internally wired to a terminal block with clearly identified terminals indicating the respective feeder shunt trip. This terminal block shall be readily accessible for field wiring connection.

2.7 POWER DISTRIBUTION UNIT CONTROLS

A. Include the following control features:

1. Emergency, power-off switch integral with power distribution unit.

2. Emergency, power-off input terminals for connection to remote power-off switch.

3. Over-under alarm shutdown with automatic unit disconnection for the following alarm conditions:

a. High temperature.

b. High and low input or output voltage.

c. Phase loss.

d. Ground fault.

e. Reverse phase rotation.

4. Ground-fault protection with automatic system shutdown.

5. Alarm Contacts: Electrically isolated, Form C (one normally open and one normally closed), summary alarm; contact set shall change state if any monitored function goes into alarm mode.

Section 26 26 00p – Power Distribution Units - Purchase

Project 1101101 26 26 00p - 6 Pre-purchase 02/24/12

6. Remote Power-Off Control: Control circuit with connection to shunt trip of power distribution unit main power circuit breaker and terminals for connection to one or more remote power-off, push-button stations.

2.8 MONITORING, STATUS, AND ALARM ANNUNCIATION

A. Description: Microprocessor-based monitoring, status, and alarm annunciation panel mounted flush in front of power distribution unit to provide status display and failure-indicating interface for the following:

1. Power Monitoring:

a. The monitoring system shall monitor and display all of the following parameters:

1) Input Voltage, Line-To-Line for all three phases

2) Output Voltages, Line-to-Line for all three phases

3) Output Voltages, Line-To-Neutral for all three phases

4) Output Voltage Total Harmonic Distortion (THD) for all three phases

5) Output Current for all three phases

6) Output Current Total Harmonic Distortion (THD) all three phases

7) Output Current Crest Factor (Peak/RMS) for all three phases

8) Output Current Harmonic K-Factor for all three phases

9) Output Neutral Current

10) System Ground Current

11) Output Frequency

12) Output kVA

13) Output kW

14) Output Power Factor

15) Output kW-Hours

16) Percent Load

17) Date

18) Time

b. All three phases of the three-phase parameters shall be displayed simultaneously.

All voltage and current parameters shall be monitored using true RMS measurements for accurate representation of non-sinusoidal waveforms typical of computers and other sensitive loads.

2. Status Indication: Unit on.

3. Alarm Annunciation:

a. The monitoring system shall detect and annunciate by audible alarm and alarm message the following conditions:

1) Output Overvoltage

2) Output Undervoltage

3) Output Overcurrent

4) Neutral Overcurrent

5) Ground Overcurrent

6) Output Voltage Distortion

7) Phase Sequence Error

8) Phase Loss

9) Frequency Deviation

10) Transformer Overtemp

b. All alarm thresholds for monitored parameters shall be adjustable by way of the service port to match site requirements. The factory setpoints for the alarms shall be as follows:

1) Output Overvoltage - output voltage exceeds +6% of nominal

2) Output Undervoltage - output voltage falls below -13% of nominal

3) Output Overcurrent - output current exceeds 95% of full load amps

4) Neutral Overcurrent - neutral current exceeds 95% of full load amps

5) Ground Overcurrent - ground current exceeds 5 amps

6) Output Voltage Distortion - output voltage THD exceeds 10%

7) Frequency Deviation - output frequency exceeds ±0.5Hz of nominal

Section 26 26 00p – Power Distribution Units - Purchase

Project 1101101 26 26 00p - 7 Pre-purchase 02/24/12

c. To facilitate troubleshooting, all alarms shall be stored in battery-backed (non-volatile) memory until reset to protect against erasure by a power outage. Alarms shall be able to be manually reset after the alarm condition has been corrected either at the unit or by way of the central monitoring system.

4. Audible Alarm and Silencing Switch: Alarm sounds when alarm indication occurs.

Silencing switch shall silence audible alarm but leave visual indication active until failure or other alarm conditions are corrected.

5. Communication with remote computer

a. Communications:

1) Modbus RTU or other industry approved open protocol method.

2) Provide ports for RS485, RS422, and Ethernet connectors.

3) Information shall be made available via SNMP and shall be accessible via a web browser.

2.9 SOUND LEVEL

A. General: Fully assembled products comply with minimum sound-level requirements in NEMA ST 20 for transformers of corresponding ratings when factory tested according to

IEEE C57.12.91.

2.10 ENCLOSURE

A. Comply with NEMA 250 Type 1

B. Conduit Entry: All equipment enclosures shall be suitable for conduit and cable entry from the top or bottom. This includes all incoming and outgoing cable connections. Ensure adequate space is available for all conduits to mount to enclosure and ensure adequate space exists within enclosure to allow for wire management. Refer to drawings for wire sizes and quantities.

2.11 TERMINATIONS

A. Provide adequate number of terminations for all power wiring to be connected to UPS modules. Include adequate number of lugs for Ground and Isolated Ground wiring that will terminate within all cabinets accommodating field wiring connections. Refer to attached one-line diagram for details of wire sizes and quantities.

2.12 FINISHES

A. Manufacturer's standard finish over corrosion-resistant pretreatment and primer.

2.13 SOURCE QUALITY CONTROL

A. Factory Tests: Design and routine tests shall comply with referenced standards.

B. Factory Sound-Level Tests: Conduct sound-level tests on equipment. Comply with IEEE C57.12.91 and NEMA ST 20.

PART 3 - EXECUTION

3.1 FIELD QUALITY CONTROL

A. Electrical Tests and Inspections – Assist the Installer and Owner’s testing agent in the performing of tests and inspections according to manufacturer's written instructions and as listed to demonstrate condition and performance of each PDU component:

Section 26 26 00p – Power Distribution Units - Purchase

Project 1101101 26 26 00p - 8 Pre-purchase 02/24/12

B. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect, test, and adjust components, assemblies, and equipment installations, including connections and to assist in testing. Report results in writing.

C. Remove malfunctioning units, replace with new units, and retest as specified above.

3.2 STARTUP SERVICE

A. Factory-authorized service representative to perform startup service.

1. Verify that power distribution units are installed and connected according to the Contract Documents.

2. Verify that electrical wiring installation complies with manufacturer's submittal and with written installation requirements in Division 26 Sections.

3. Complete installation and startup checks according to manufacturer's written instructions.

3.3 ADJUSTING

A. Set field-adjustable switches and circuit-breaker trip ranges as indicated.

B. Adjust power distribution units to provide optimum voltage to equipment served throughout normal operating cycle of loads served. Record input and output voltages and adjustment settings, and incorporate into test results.

1. Set no load output voltage to 125V.

3.4 CLEANING

A. Vacuum dirt and debris; do not use compressed air to assist in cleaning.

B. Touch up scratched or massed surfaces to match original finish.

3.5 DEMONSTRATION

A. Factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain power distribution units. Refer to Division 01 Section "Demonstration and Training."

3.6 INTEGRATED SYSTEMS TESTING

A. Provide field technicians to support integrated systems testing (commissioning level 5) in addition to and after successful completion of acceptance testing (level 4).

END OF SECTION