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TranSystems Corporation - LGM Construction

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501070099 Federal Express Oakland Sort Expansion Issued for Bid 10/11<br />

G. All doors shall have provisions for padlocking.<br />

2.3. 12KV SECTIONS<br />

A. Provide freestanding, floor-mounted, dead-front, dead-rear sections with ratings as follows:<br />

1. 12.0KV nominal voltage, 3-phase, 3-wire plus ground, 60Hz<br />

2. 600A minimum (continuous) copper bus<br />

3. 15KV maximum voltage<br />

4. 95KV BIL rating<br />

5. 18KA short circuit RMS current rating<br />

6. 500MVA nominal three-phase<br />

B. Enclosed air-interrupter primary switch:<br />

1. Three pole, single throw, dead front, metal enclosed, with quick-make, quick-break manual stored<br />

energy operator, with fuses mounted on a single frame complying with IEEE C37.20.3 “Standard for<br />

Metal Enclosed Interrupter Switchgear. Operating handle shall be removable.<br />

2. Key interlocking system to prevent fuse access door from being opened unless switch is open.<br />

3. Phase Barriers: Located between blades of each phase, designed for easy removal, allows visual<br />

inspection of switch components when barrier is in place.<br />

4. Window: Permits viewing switch-blade positions when door is closed.<br />

5. Accessory Set: Tools and miscellaneous items required for interrupter switchgear test, inspection,<br />

maintenance, and operation. Include fuse-handling tool as recommended by switchgear manufacturer.<br />

6. Fuses: Comply with the following:<br />

a. Current-limiting type, rated for not less than 50-kA RMS symmetrical current-interrupting capacity.<br />

b. Indicator integral with each fuse to show when it has blown.<br />

7. Switch incoming terminals shall be compression type, sized to accept medium voltage cable up to 500<br />

MCM.<br />

C. Sections shall be fitted with infrared viewing windows located to allow non-invasive, closed panel infrared<br />

inspection of all bus and bus connections. Provide infrared viewing windows as follows:<br />

1. Fluke CLKT C-Range Quadraband, or approved equal.<br />

2. Engineered and tested to withstand electric arcs up to 50KA for 30 cycles.<br />

3. UL-certified for type 3/12 environments<br />

4. Self-grounding<br />

5. Protected against moisture degradation<br />

6. Compatible with the following types of thermographers:<br />

a. Shortwave infrared<br />

b. Midwave infrared<br />

c. Longwave infrared<br />

d. Ultraviolet capable<br />

12 KV – 480/277V SECONDARY DOUBLE-ENDED UNIT SUBSTATIONS 16371-4

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