Spec - 0230_ES_281914 Rev D.pdf

This is a Performance Specification for a low voltage switchgear panel designed for pad-mounted outdoor operation in a mission-critical application. The specification defines comprehensive technical requirements for a 480V, 3-phase, 4-wire system with a 2000A main bus rated at 60 Hz.

The switchgear panel shall include one main breaker, one generator backfeed breaker, four feeder breakers, one spare feeder breaker, an automatic transfer switch (ATS), and local metering capabilities. All equipment must conform to IEEE, ANSI, and NEMA standards with UL listing or equivalent NRTL certification. The enclosure shall meet NEMA 3R outdoor standards, feature a welded structural steel base frame, and be finished in ANSI 61 gray. Circuit breakers must be Siemens WL or FFDG-approved equivalents with ETU 745 trip units and LCD options, rated for 65 kA minimum interrupting capacity and including LSIG protection. The specification requires 1000A feeder breaker plugs with 1600A frames and 2000A main/generator breaker plugs with 2000A frames. Bus bars shall be tin-plated copper rated at 2000A with 65 kA minimum bracing value. Space heaters rated 240V/100W shall be installed and operated at 120V via internal CPT to prevent moisture condensation. The ATS must be rated 2000A continuous with 65 kA interrupt rating, UL 1008 listed, and include both manual and automatic modes with bypass switch provisions. Control wiring shall be 14-gauge minimum, stranded SIS type with labeled terminals. Incoming connections for the main breaker and generator backfeed shall use 500 MCM XHHW-2 wire with bottom entry. All construction drawings require Fermilab approval prior to fabrication, with submittals due at specified intervals including bid questionnaire and high-level BOM with bid, dimensional drawings within 30 days after award, and complete as-built documentation with shipment. Factory testing shall conform to ANSI C37.50 and C37.51 standards with certified results provided to Fermilab, and at least 10 working days' advance notice is required for pre-award site visits and test witnessing.