Attachment 2 - RKMF 21-0047 Transformer Salient Characteristics.pdf
PDF 133 KB Posted
- Attached to
- 820 RHS Transformer Federal contract opportunity
- Solicitation number
- F3GHBA3026AW02
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| File | Type | Posted |
|---|---|---|
| Attachment 1 - Transformer SOW IT Node 2121.pdf |
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IT Node 2121 Transformer
Salient Characteristics:
ꞏ Pad-Mounted type
ꞏ Transformer mounting pads shall contain hand-holes underneath the pad openings
ꞏ 3-Phase delta-wye
ꞏ Power: 150 kVA
ꞏ High Voltage: 12470 Δ, 95 kV BIL.
Used on 12470 Y 7200 System with 10% neutral on transformer present.
ꞏ Low Voltage: 208 Y/120, 30 kV BIL
-Impedance: Minimum 5%
ꞏ Taps: Provide 5-Position oil immersed primary tap changer (+5.0%, +2.5%, 0%, -2.5%, -5.0%).
ꞏ HV Bushings: (6) 15kV 200A Wells & Inserts (dead front loop feed)
ꞏ LV Bushings: (4) 4-Hole Spades
ꞏ Fluid: FR3 or other environmentally friendly oil
ꞏ Frequency: 60 Hz
ꞏ Temperature Rise: 45°C average ambient temperature with 50°C winding rise instead of the normal ratings of 30°C ambient with 65°C rise, maintaining the average hot spot temperature rating of 95°C.
Must be suitable for operating at 43°C for 12 hours per day with included ambient peaks up to 117°F for 4 hours.
ꞏ Cooling Class: KNAN
ꞏ Windings: Copper/Copper
ꞏ Fusing: Fuses to be bayonet type oil immersed removable in primary compartment having cups below them in series with in-tank current limiters. No bolt- on fuses are allowed because they are non-dead-front connections.
ꞏ Pressure Relief Valve
ꞏ Switch: Transformer shall be loop feed, with three (3) 2-position on-off 3phase oil immersed switches (one switch each for A, B, T). Use of four, five or six position switch is not permitted.
ꞏ Tank Material: Mild Steel
ꞏ Arresters:
-Provide 3-nominal 8KV (7.65KV actual) or nominal 9KV (8.4KV actual) MOV in 15KV elbows on B feed connected phase to ground on all transformers that are last on a lateral circuit.
o Provide parking positions for Loadbreak Elbows on A and B feeds. Parking positions to be provided for A and B feeds. Note that all six cables must be able to be parked at once.
o Doors to swing out, not up. Pentabolts on doors. Doors to be padlock-able.
ꞏ Gauges & Accessories:
o Dial-Type Thermometer o Liquid Level Gauge o Pressure Vacuum Gauge o Temperature gauge o Oil filler o Oil sampler
ꞏ Additional Information:
o NEMA ground pads in primary compartment for termination of 100% incoming and out-going primary neutrals and grounds and 4/0 from ground ring.
o NEMA ground pads in secondary compartment for termination of secondary connection (4/0) from ground ring.
o Transformers shall be factory painted Hentzen 70032XXX
File details come from the government source that posted it. Updated .