atch1_CESTransformers_Specification.pdf
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- Attached to
- MAFB Transformers Federal contract opportunity
- Solicitation number
- FA462625Q0058
About this file
This document is a detailed Transformer Specifications file for Malmstrom Air Force Base in Montana, outlining requirements for brand new 3-phase pad-mounted transformers. The specifications cover critical technical parameters including primary and secondary voltage configurations (12470D/7200 primary, 208Y/120 secondary), copper conductor material, KNAN cooling class, Envirotemp FR3 insulating fluid, and DOE 2010 efficiency standards. Additional key features include 200 amp bushing wells, load-break switches, Varistar elbow arresters, Cooper load-break inserts, and Prywell CLE expulsion fuses.
The attached table provides a comprehensive breakdown of transformer sizes ranging from 75 kVA to 1500 kVA, with corresponding primary and secondary voltage configurations. Each transformer size is mapped to the number of recommended spares and facilities backed up, ranging from 1 to 26 facilities. Standard features include a 20-inch deep cabinet, penta-head cabinet door bolts, danger high voltage decals, various gauges and fittings like liquid level and pressure/vacuum gauges, IEEE standard ground pads, a nitrogen blanket, and a standard 1-year warranty. The transformers are specifically designed for operation at 1000m (3300 ft) above sea level and meet NEMA TRI sound level standards.
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Other files for this federal contract opportunity
| File | Type | Posted |
|---|---|---|
| MAFB Transformers Questions and Answers.pdf | ||
| COMBO_MAFBTransformers.pdf |
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Text version
Transformer Specifications Malmstrom AFB, MT
No Rebuilds or Refurbished Units Brand New Transformer kVA Kilovolt-amperes (kVA) 3 Phase Pad-Mounted Transformer – see attachment
Temperature Rise 65-degree average winding rise Cooling Class KNAN
Frequency 60
Insulating Fluid Envirotemp FR3 Elevation Designed for operation at 1000m (3300 ft) above sea level
Material Copper Conductor
Efficiency Standard DOE 2010, 10 CRF Part 431 Sound Level NEMA TRI Standard Primary Conductor Copper Primary Winding Material Primary Voltage 12470D/7200
BIL 95 kV kV Class 15 kV
Primary Configuration Dead Front Primary Configuration Loop Feed
Taps 2 — 2.5% taps above and 2 — 2.5% taps below nominal
Tap Changer 100 Amp 5-position tap changer Primary Bushings 200 amp bushing well(s) (Qty: 6)
Inserts 15kV, 95kV BIL Cooper load-break inserts (Qty: 6)
Load- break Switching (3) 200A two position load break switches, 16 kA rated
Primary Arrester Varistar elbow arresters, 15 kV class, 12 kV (Qty:
3)
Overcurrent Protection (sub-category for the Expulsion Fuses) Expulsion Fuses Prywell CLE Fuses (Qty: 3) Bayonet Holder Copper Bayonet Fuse Holder (Qty: 3) Secondary Voltage 208Y/120 Secondary Conductor Copper Secondary Winding Material
BIL 30 kV
Secondary kV Class 1.2 kV
Secondary Configuration Live Front
Secondary Configuration Radial Feed
Secondary Bushings Integral copper 6-hole spade bushing(s) (Qty: 4) Cabinet 20in deep cabinet Cabinet hardware Penta-head cabinet door bolts ANSI K-Dimension Loop feed per ANSI C57.12.34 Figure 2 minimum dimensions Coatings Special paint color FED Spec 37056
Notifications Danger High Voltage decals — one on each side of unit Gauges & Fittings Liquid level gauge
Gauges & Fittings Thermometer, dial-type Gauges & Fittings Pressure/vacuum gauge Gauges & Fittings Pressure relief device, 50 SCFM Gauges & Fittings Drain valve with sampler in LV Compartment (1") Gauges & Fittings Schrader valve Tank accessories IEEE standard one-hole ground pads (Qty: 3) Tank accessories Nitrogen Blanket Packaging Pallet
Cover Bolted cover Warranty Standard 1 Year
Attachment - Kilovolt-amperes (kVA) 3 Phase Pad-Mounted Transformer
THREE PHASE
SIZE PRIMARY SECONDARY RECOMMENDED # SPARES ON HAND # OF FACILITIES BACKED UP
1500 KVA 12470D/7200 480Y/277 1 2
1000 KVA 12470D/7200 480Y/277 1 7
750 KVA 12470D/7200 480Y/277 1 12
750 KVA 12470D/7200 208Y/120 2 26
225 KVA 12470D/7200 480Y/277 1 8
225 KVA 12470D/7200 208Y/120 2 19
75 KVA 12470D/7200 480Y/277 1 1
75 KVA 12470D/7200 208Y/120 1 9
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