26 26 00.pdf

P-719 Wargaming Center eProject No. 1590908 Marine Corps Base, Quantico, VA Issued for Construction

SECTION 26 26 00

POWER DISTRIBUTION UNITS

11/13

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE C57.12.91 (2011) Standard Test Code for Dry-Type Distribution and Power Transformers

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA ST 20 (1992; R 1997) Standard for Dry-Type Transformers for General Applications

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2017; ERTA 1-2 2017; TIA 17-1; TIA 17-2;

TIA 17-3; TIA 17-4; TIA 17-5; TIA 17-6;

TIA 17-7; TIA 17-8; TIA 17-9; TIA 17-10;

TIA 17-11; TIA 17-12; TIA 17-13; TIA

17-14; TIA 17-15; TIA 17-16; TIA 17-17 )

National Electrical Code

UNDERWRITERS LABORATORIES (UL)

UL 1561 (2011; Reprint Sep 2012) Dry-Type General Purpose and Power Transformers

U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)

29 CFR 1910 Occupational Safety and Health Standards

1.2 RELATED DOCUMENTS

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

1.3 SUMMARY

These specifications describe requirements for a complete power conditioning and distribution system, supplying computer-grade power to sensitive loads. The specified system shall provide isolation, distribution, control and monitoring of AC power. It shall include all equipment to properly interface the AC power source to the intended load.

SECTION 26 26 00 Page 1

1.4 DEFINITIONS

a. TVSS: Transient voltage surge suppressor.

b. UPS: Uninterruptible power supply.

1.5 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval. The following shall be submitted in accordance with Section

01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Power Distribution Units; G Include: dimensioned plans, sections, and elevations. Detail equipment assemblies and indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.

Wiring Diagrams: Power, signal, and control wiring.

SD-03 Product Data

Power Distribution Units; G Include system description, ratings, capacities, and performance characteristics.

SD-06 Test Reports

Source quality control test reports.

For each factory test of power distribution units.

SD-09 Manufacturer's Field Reports

Field quality control test reports.

SD-10 Operation and Maintenance Data

For power distribution units to include in emergency, operation, and maintenance manuals.

1.6 QUALITY ASSURANCE

1.6.1 Manufacturer Qualifications

A qualified manufacturer. Maintain a service center capable of providing training, parts, and emergency on-site repairs in less than eight hours maximum response time.

1.6.2 Factory Test

The specified system shall be factory-tested before shipment. Testing shall include, but shall not be limited to: Quality Control Checks, "Hi-Pot" Test (two times rated voltage plus 1000 volts, per UL requirements) and Metering Calibration Tests. The system shall be designed and manufactured according to world class quality standards. The

SECTION 26 26 00 Page 2 manufacturer shall be ISO 9001 certified.

1.6.3 Source Limitations

Obtain power distribution unit and associated components specified in this Section from a single manufacturer with responsibility for entire power distribution unit installation.

1.6.4 Electrical Components, Devices, and Accessories

Listed and labeled as defined in NFPA 70 , Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

1.6.5 Comply

Comply with NFPA 70 .

1.7 DELIVERY, STORAGE, AND HANDLING

a. Deliver equipment in fully enclosed vehicles after specified environmental conditions have been permanently established in spaces where equipment is to be placed.

b. Store equipment in spaces with environments controlled within manufacturer's ambient temperature and humidity tolerances for non-operating equipment.

1.8 COORDINATION

a. Coordinate size and location of concrete bases or stands with actual power distribution unit provided. Cast anchor-bolt inserts into bases. Concrete, reinforcement, and formwork requirements are specified with concrete.

b. Coordinate layout and installation of power distribution units with access flooring for proper support and seismic restraint of units.

c. Coordinate layout and installation of power distribution units with Owner's equipment.

(1) Meet jointly with electronic equipment representatives and Owner's representatives to exchange information and agree on details of equipment arrangements and installation interfaces.

(2) Record agreements reached in meetings and distribute record to other participants.

(3) Adjust arrangements and locations of power distribution units to accommodate and optimize arrangement and space requirements of equipment.

1.9 PROJECT CONDITIONS

1.9.1 Environmental Conditions

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

SECTION 26 26 00 Page 3

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.

1.10 Electrical Requirements

Output capacity shall be 500 kVA.

Input voltage shall be 480 volts AC, 60 Hz, three-phase, three-wire-plus-ground.

Output voltage shall be 120/208 volts AC, three-phase, four-wire-plus-ground, wye configuration.

PART 2 PRODUCTS

2.1 Cybersecurity

All Control Systems (CS) are subject to cybersecurity requirements. Refer to 25 05 11 for a comprehensive listing of the mandatory requirements (CCIs) for all products and systems.

2.2 POWER DISTRIBUTION UNITS (PDU)

2.2.1 Description

Basis of Design Eaton.

Integrated and coordinated assembly of power-line-conditioning and distribution components packaged in a single cabinet or modular assembly of cabinets. Include the following components:

a. Input-power section.

b. Isolation transformer.

c. TVSS system.

d. Output breakers.

e. Alarm, monitoring, and control system.

2.2.2 Frame Construction and Enclosure

The frame shall be constructed of welded steel to provide a strong substructure. The enclosure shall be mounted on four (4) heavy-duty swivel casters for portability and ease of installation and shall be provided with four permanent leveling jacks for final installation. The bottom entry/exit unit shall have a screen top with provisions for entrance and exit of all input and output cabling through the bottom of the unit. The unit shall have easily removable and interchangeable output cable trays for each panelboard to allow matching of the size and number of cable/conduit openings to the site requirements. A minimum of 72 cable/conduit openings shall be provided for each output panelboard. All service shall be capable of being performed with access to the front plus

SECTION 26 26 00 Page 4 a choice of any one side or rear for installation flexibility.

Retrofitting additional power distribution cables shall require access to the front of the unit only. A tool shall be required to remove the exterior panels, which access the hazardous voltage area of the unit. To ensure grounding integrity and for static protection and EMI/RFI shielding, the removable exterior panels shall be grounded to the frame by way of stranded copper wire. Hinged double front doors shall provide access to the main input circuit breaker and to all output circuit breakers. The color of the exterior panels shall be manufacturer's standard color, black gray matte. Optional custom-painting to match or accent the Data Processing equipment shall be available.

The unit shall be naturally convection-cooled. No fans for forced-air cooling system shall be used. The convection cooling method shall allow continuous full-load operation without activation of over-temperature circuits. Heat rejection shall be through a screened protective top which prohibits entry of foreign material.

The frame shall be configured to accept future field installation of additional bolt-on distribution sections containing additional panelboard and cable tray capacity.

The complete system dimensions shall be a maximum of 44in. (1118mm) wide by 77in. (1959mm) high by 32in. (813mm) deep. The distributed floor weight shall be less than 250 lb./ft2 (1225kg/sq2).

2.2.3 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:

2.2.3.1 Input Voltage

Within rated input-voltage tolerance band of unit.

2.2.3.2 Load Current

Minimum of 3.0 crest factor and 85 percent total harmonic distortion.

2.3 ISOLATION TRANSFORMER SECTION

The unit shall contain an electrostatically shielded TP-1 listed isolation transformer with a rating as described in Section 1.3. The transformer shall be a dry-type, double-shielded, three-phase, common-core, convection air-cooled transformer. The transformer shall conform to UL1561, with 302°F (150°C) maximum temperature rise. All transformer windings shall be copper.

Transformer shall be K13 rated.

The transformer shall be energy efficient and shall meet NEMA standard TP-1 2002. The transformer shall exhibit the following characteristics:

percent impedance, 3.8 to 5.3%; common mode noise attenuation, 120 dB;

harmonic voltage distortion, 0.5% maximum additive; full-load efficiency, 96 to 98.6%.

The isolation transformer shall be provided with six full-capacity compensation taps at 2-1/2% increments to accommodate field adjustment to

SECTION 26 26 00 Page 5 match the source voltage. These compensation taps shall be easily accessible by removal of one exterior panel. Tap changes include: two above nominal voltage (upper range limit of +5%), nominal voltage and four below nominal voltage (lower range limit of -10%).

The unit shall be provided with additional thermal overload protection for the transformer. An alarm shall notify personnel if the transformer temperature reaches 356°F (180°C). The unit shall automatically shut down if the transformer temperature reaches 392°F (200°C). Temperature sensors shall be located in each coil of the three phase windings.

2.4 Manual Restart

The specified unit shall be equipped with a manual restart feature to allow for an orderly supervised startup after power failure. A field-selectable auto-restart mode shall be provided to deactivate the manual restart if desired.

2.5 Emergency Power Off (EPO)

The local EPO shall include a covered "Emergency Power Off" push button.

Pressing the EPO switch shall immediately shut down the unit. As part of the EPO circuit, an interface shall also be provided for connecting one or more normally open or normally closed remote EPO switches to the EPO circuit. For flexibility in meeting shutdown control schemes, the local EPO (unit shutdown) circuit shall be isolated from the remote EPO (room shutdown) circuit. The remote EPO circuit shall be designed to allow direct connection of multiple units with single and multiple shutdown control contacts.

2.6 Computer Grade Ground

The specified system shall include a computer-grade, single-point ground in accordance with computer manufacturers' recommendations, IEEE Std. 1100 and the requirements of the NEC. The transformer output neutral shall be solidly grounded in accordance with NEC Article 250-26. Grounding conductors shall be sized in accordance with IEC 364-HD-384 and applicable national and local codes.

2.7 TVSS SYSTEM

2.7.1 Description

Integrated TVSS system to protect unit panelboard, and having the following features:

2.7.1.1 Disconnect Device

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

2.7.1.2 Nonlinear Loading

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

2.8 Output Distribution Breakers

The specified system shall contain output breakers for distribution to the

SECTION 26 26 00 Page 6 intended loads (in place of the standard panelboards)as indicated on drawings. The breakers shall have a rating as indicating on drawings, with an interrupting rating of 35kA RMS at 240/120 VAC.

2.9 POWER DISTRIBUTION UNIT CONTROLS

Include the following control features:

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

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

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

(1) High temperature.

(2) High and low input or output voltage.

(3) Phase loss.

(4) Ground fault.

(5) Reverse phase rotation.

d. Ground-fault protection with automatic system shutdown.

e. 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.

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

g. Auxiliary Control Outputs

2.10 MONITORING, STATUS, AND ALARM ANNUNCIATION

2.10.1 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:

a. Power Monitoring:

(1) Input Voltage: Line to line, rms.

(2) Output Voltage: Line to line, rms.

(3) Output Voltage: Line to neutral, rms.

(4) Output current.

b. Status Indication: Unit on.

c. Alarm Annunciation:

SECTION 26 26 00 Page 7

(1) High temperature.

(2) High and low input voltage.

(3) High and low output voltage.

(4) Phase loss.

(5) Ground fault.

(6) Frequency.

(7) Phase rotation.

(8) TVSS module failure.

d. 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.

2.11 SOUND LEVEL

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 .

2.12 FINISHES

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

2.13 SOURCE QUALITY CONTROL

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

PART 3 EXECUTION

3.1 INSTALLATION

a. Arrange power distribution units to provide adequate access to equipment and circulation of cooling air.

b. Anchor or restrain floor-mounting power distribution units according to manufacturer's written instructions.

c. Identify equipment and install warning signs.

3.2 CONNECTIONS

a. Ground equipment as required

(1) Separately Derived Systems: Make grounding connections to grounding electrodes as indicated; comply with NFPA 70 .

SECTION 26 26 00 Page 8

3.3 FIELD QUALITY CONTROL

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

b. Test Labeling: On completion of satisfactory testing of each unit, attach a dated and signed "Satisfactory Test" label to tested component.

3.4 STARTUP SERVICE

Engage a factory-authorized service representative to perform startup service.

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

b. Verify that electrical wiring installation complies with manufacturer's submittal and with written installation requirements in other electrical Sections.

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

3.5 ADJUSTING

a. 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.

3.6 CLEANING

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

3.7 DEMONSTRATION

Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain power distribution units.

-- End of Section --

SECTION 26 26 00 Page 9

1.10 Electrical Requirements