SPECS_26_23_00_and_26_24_13_AMEND0006.pdf

FY17 MCON PROJECT P-834 SEAWOLF CLASS SERVICE PIER 1304011AMEND006

b. Continuous current.

2.8.3 Switchgear Production Tests

IEEE C37.20.1 and UL 1558 . Furnish reports which include results of production tests performed on the actual equipment for this project. These tests include:

a. 60-hertz dielectric tests.

b. Mechanical operation tests.

c. Electrical operation and control wiring tests.

d. Ground fault sensing equipment test.

2.8.4 Cybersecurity Equipment Certification

Furnish a certification that control systems are designed and tested in accordance with DoD Instruction 8500.01, DoD Instruction 8510.01, and as required by individual Service Implementation Policy.

2.9 ARC FLASH WARNING LABEL

Provide warning label for switchgear. Locate this self-adhesive warning label on the outside of the enclosure warning of potential electrical arc flash hazards and appropriate PPE required. Provide label format as indicated.

2.10 SERVICE ENTRANCE AVAILABLE FAULT CURRENT LABEL

Provide label on exterior of switchgear used as service equipment listing the maximum available fault current at that location. Include on the label the date that the fault calculation was performed and the contact information for the organization that completed the calculation. Locate this self-adhesive warning label on the outside of the switchgear. Provide label format as indicated.

2.11 MIMIC BUS LABELING

Provide a mimic bus on the front of the equipment to diagrammatically show the internal bus structure of the lineup.

2.12 STATION BATTERIES AND CHARGER

Provide station batteries and charger, suitable for the requirements of the switchgear and circuit breakers. Batteries shall be 2448 V, lead-acid, pasted plate type or sealed, totally absorbed electrolyte type.

a. Pasted plate type batteries: Positive plates shall be of the manchester type and negative plates shall have a life equal to or greater than the positive plates. Battery containers shall be heat and impact resistant clear plastic with electrolyte level lines permanently marked on all four sides. A permanent leakproof seal shall be provided between cover and container and around cell posts. Sprayproof vent plugs shall be provided in covers. Sufficient sediment space shall be provided so that the battery will not have to be cleaned out during its normal life. High porosity separators to provide correct spacing

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26 23 00 mevans Text Box Amendment 0006 between plates shall be provided. Capacity shall be calculated by switchgear manufacturer and approved by Contracting Officer before acceptance.

b. Sealed batteries: Provide batteries with leakproof, spillproof electrolyte utilizing highly absorbent material to separate the positive and negative plates. Battery jars shall be hermetically sealed with welded seams. Batteries shall be maintenance-free and shall not require water to be added. Capacity shall be calculated by switchgear manufacturer and approved by Contracting Officer before acceptance.

c. Battery Capacity: Provide battery with sufficient capacity to perform the following duty cycle with charger disconnected and not drop below 80 percent remaining capacity.

1. Operate gear ancillary equipment for 1 hour.

2. Open all medium voltage circuit breakers via 86 lockout relays.

cd. Battery charger shall be full-wave rectifier type, utilizing silicon semiconductor devices. Charger shall maintain a float charge of 2.15 V per cell and an equalizing charge of 2.33 V per cell. An equalizing charge timer shall be provided which operates automatically after an AC power failure of 5 seconds or more. Timer shall be adjustable for any time period up to 24 hours. Timer shall also be capable of being actuated manually. Adjustable float and equalizing voltage potentiometers shall be provided. Charger voltage shall be maintained within plus or minus 1/2 percent from no load to full load with AC line variations of plus or minus 10 percent and frequency variations of plus or minus 5 percent. DC voltmeter and ammeter with a minimum 3 1/2 inch scale and 2 percent accuracy of full scale shall be provided. Output current shall be limited to 115 percent of rated output current, even down to short circuit of the DC output terminals. Solid state circuit shall have AC and DC transient voltage terminals. AC and DC magnetic circuit breakers shall be provided. Circuit breakers shall not be overloaded or actuated under any external circuit condition, including recharge of a fully discharged battery and short circuit of the output terminals. Charger shall be capable of continuous operation at rated current at an ambient temperature of 40 degrees C. Output DC current capacity shall match the requirements of the batteries provided.

d. Mount battery rack inside switchgear.

PART 3 EXECUTION

3.1 INSTALLATION

Conform to IEEE C2 , NFPA 70 , and to the requirements specified herein.

Provide new equipment and materials unless indicated or specified otherwise.

3.2 GROUNDING

NFPA 70 and IEEE C2 , except that grounds and grounding systems with a resistance to solid earth ground not exceeding 25 ohms.

3.2.1 Equipment Grounding

Provide bare copper cable not smaller than No. 4/0 AWG connection to the

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2.2.2.4 Distribution Sections

Provide the distribution sections consisting of molded-case circuit breakers as indicated.

2.2.2.5 Auxiliary Sections

Provide auxiliary sections consisting of indicated metering equipment, transformer, and panelboard as indicated.

2.2.2.6 Handles

Provide handles for individually mounted devices of the same design and method of external operation. Label handles prominently to indicate device ampere rating, color coded for device type. Identify ON-OFF indication by handle position and by prominent marking.

2.2.3 Protective Device

Provide main and branch protective devices as indicated.

2.2.3.1 Power Circuit Breaker

Provide the following:

a. IEEE C37.13 . Manually operated stationary, unfused, low-voltage power circuit breaker with a short-circuit current rating as indicated.

b. Breaker frame size: as indicated.

c. Equip electrically operated breakers with motor-charged, stored-energy closing mechanism to permit rapid and safe closing of the breaker against fault currents within the short time rating of the breaker, independent of the operator's strength or effort in closing the handle.

2.2.3.2 Molded-Case Circuit Breaker

Provide the following:

a. UL 489 . UL listed and labeled, manually operated, low voltage molded-case circuit breaker, with a short-circuit current rating as indicated.

b. Breaker frame size: as indicated.

c. Series rated circuit breakers are unacceptable.

2.2.4 Electronic Trip Units

Equip main and 400 amperes and larger distribution breakers with a solid-state tripping system consisting of three current sensors and a microprocessor-based trip unit that provides true rms sensing adjustable time-current circuit protection. Include the following:

a. Current sensors ampere rating: as indicated.

b. Trip unit ampere rating: as indicated.

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