Salient Characteristics Rev 16 Sep.pdf
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- 750kVA Transformer
- Solicitation number
- FA462025QA829
About this file
This document is a Salient Characteristics specification for 750 kVA Transformers, revised on 16 September 2025. The detailed specification covers a three-phase transformer with a 65-degree average winding rise, KNAN cooling class, and DOE 2016 efficiency standard. Key technical specifications include a high voltage of 13200 Delta Volts (15 kV Class), loop feed primary configuration, and a 5-position tap changer. The transformer features 200 Amp bushing wells, 15kV load break inserts, and over-current protection using bayonet fuses. The low voltage side is 480Y/277 volts with a radial feed and live front termination style.
Additional features include a 20-inch-deep IEEE/ANSI cabinet in Munsell Green, UL listing, magnetic liquid level gauge, pressure/vacuum gauge, and dial-type thermometer. The transformer allows for either aluminum or copper coil and winding materials. Specific design elements include two 2.5% taps above and below nominal, 6 high voltage bushings, 3 load break switches, ground pads, drain and fill valves, and a pressure relief device rated at 50 SCFM. The specification provides comprehensive technical details for procurement and installation of these transformers.
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Text version
SALIENT CHARACTERISTICS
FOR
750 kVA Transformers
Revised:
16 September 2025
1523970069A Highlight
Detail Description kVA 750kVA 3 Phase Temp Rise 65-degree average winding rise Cooling Class KNAN Insulating/Cooling Fluid Fluid; No specific requirement Efficiency Standard DOE 2016 High Voltage 13200 Delta Volts High Voltage kV Class 15 kV Class High Voltage kV BIL 95 kV BIL Primary Termination Style Dead Front Primary Feed Type Loop Feed Taps 2ea 2.5% Taps above and 2EA 2.5% Taps below nominal Tap Changer 5-position tap changer Tap Changer Switch Location Front Plate HV Compartment High Voltage Bushings 200 Amp bushing wells with removeable studs (6ea) High Voltage Inserts 15kV, 95kV BIL load break inserts (6ea) Load Break Switch(es) 15-38kV, 300 Amp, 2 position (3ea) Load Break Switch Location Front Plate HV Compartment Switch Cover Padlock provision on switch handle (inside HV compartment) Arresters None Over Current Protection Bayonet fuses in series with partial-range current limiting fuses (3ea) Expulsion fuses bayonet fuses(3a) Bayonet Holder bayonet fuse holder (3ea) Spare Expulsion Fuses bayonet fuses(3a) Low Voltage 480Y/277 Low Voltage kV Class 1.2 kV Class Low Voltage kV BIL 30 kV BIL Secondary Termination Style Live front Secondary Feed Radial Feed Low Voltage Bushing Location LV front Plate Low Voltage Bushings 1" copper stud with 12-hole screw on spade bushings (4ea) Bushing supports Standard LV bushing support assembly Cabinet 20-inch-deep cabinet Cabinet hardware Penta-head cabinet door bolts Cabinet Types IEEE/ANSI Infrared Viewing Window Not required Cabinet accessories pocket on compartment door for spare fuses Bushing layout k 4.5 Loop feed per IEEE Coatings Munsell Green - Munsell 7GY 3.29/1.5 FM/UL certifications UL Listed Liquid Level Gauge Magnetic Liquid level gauge Pressure Vacuum gauges Pressure/Vacuum gauge Thermometer Dial Type Drain Valve Drain Valve with sampler in LV compartment Fill Valve Fill Plug in LV compartment Pressure Relief Device 50 SCFM Gound Pads two-hole ground pads (3ea) Coil Material Aluminum or Copper Winding Material Aluminum or Copper
1523970069A Highlight
1523970069A Highlight
File details come from the government source that posted it. Updated .