Specifications include, but are not limited to: Item #1. Provide 1 each S&C Electric Company (no exceptions), pad-mounted, vacuum interrupter, Vista solid dielectric (SD) distribution switchgear model #541 and enclosure. Switchgear shall contain four (4) each 16 kA symmetrical load interrupter switch ways with the center switch way configured as a bus tie switch and one (1) each 16 kA symmetrical fault interrupter switch way constructed in a pad mount switchgear assembly. Equipment shall be equivalent to part #925412-P1-L2-O and per the following Vista SD specifications: A. Load Interrupter Switch Ways (at Ways #1, 2, and 5): 1. Rated 15 kV, 95 kV BIL. 2. Three phase, two-position (open and closed) 600 amps, vacuum interrupter in series with an isolated disconnect, using solid dielectric insulation system. Manual switch operations shall open or close all three phases simultaneously. 3. 600 amp continuous and load break. 4. Momentary and close into fault rating as specified above. 5. Potential Indication, with low-voltage phasing provisions, to indicate presence of voltage on each phase. 6. 600 amp Apparatus Bushings with copper studs; elbows by Iowa State University. 7. Load Interrupter switch ratings per IEEE 1247. B. Load Interrupter Bus Tie Switch Ways (at Way #3): 1. Rated 15 kV, 95 kV BIL. 2. Three phase, two-position (open and closed) 600 amps, vacuum interrupter in series with an isolated disconnect, using solid dielectric insulation system. Manual switch operations shall open or close all three phases simultaneously. 3. 600 amp continuous and load break. 4. Momentary and close into fault rating as specified above. 5. Potential Indication, with low-voltage phasing provisions, to indicate presence of voltage on each phase. 6. Load Interrupter switch ratings per IEEE 1247. C. Fault Interrupter Switch Ways (at Way #4): 1. Rated 15 kV, 95 kV BIL. 2. Three phase, two-position (open and closed), 600 amps, vacuum interrupter in series with an isolated disconnect, using solid dielectric insulation system. Manual or electronic switch operation shall open all three phases. Manual operation required to place the switch in the closed position. 3. Momentary and close into fault rating as specified above. 4. Potential Indication, with low-voltage phasing provisions, to indicate presence of voltage on each phase. 5. 600 amp Apparatus Bushings with copper studs; elbows by Iowa State University. 6. Microprocessor based overcurrent control programmable via personal computer. 7. Overcurrent curves shall match at a minimum S&C standard speed SM refill units, E curves, type TCC 153-4 for minimum melting time and TCC 153-4-2 for total clearing time. 8. Overcurrent controls shall be mounted in an accessible NEMA 1 cabinet. 9. Fault Interrupter ratings per IEEE C37.60. D. Pad-mounted switchgear assembly shall be as follows: 1. Assembly ratings per IEEE C37.20.3, C37.74, and C57.12.28. 2. Enclosure to be 14-gauge mild steel, painted olive green, no. 7GY3.29/1.5. 3. The enclosure shall be tamper-resistant and include front access hinged doors. 4. Enclosure shall include a hinged roof with latches at each end, with pentahead bolt and provisions for padlocking. 5. Provide lifting provisions for switchgear enclosure. 6. Maximum height shall not exceed 54 inches with covers closed. E. Included are the following standard components: 1. All copper current carrying components. 2. Operating handle. 3. Corrosion resistant external fittings and hardware. 4. Stainless steel one-line diagram and corrosion resistant nameplates. 5. Continuous ground bus, with short-circuit rating that equals switchgear assembly. 6. Padlockable load and fault interrupter switch operating mechanisms with position indicating open or closed. 7. One viewing window per switch way.
