Salient Characteristics Rev 4 Sep.pdf
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- 750kVA Transformer
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- FA462025QA829
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This document is a Salient Characteristics specification for a 750 kVA 3-phase transformer, revised on 4 September 2025. The transformer features a 65-degree average winding rise, KNAN cooling class, and uses Envirotemp FR3 insulating fluid, meeting DOE 2016 efficiency standards. It has a high voltage of 13200 Delta Volts with 15 kV class and 95 kV BIL, utilizing a dead front primary termination and loop feed configuration with a 5-position tap changer.
Key technical specifications include 200 Amp bushing wells, 15kV load break inserts, and over-current protection via bayonet fuses. The low voltage side is 480Y/277 volts with a 1.2 kV class and 30 kV BIL, featuring a live front secondary termination and radial feed. The transformer has a 20-inch-deep IEEE/ANSI cabinet in Munsell Green, copper coils and windings, UL listing, and includes features like magnetic liquid level gauge, pressure/vacuum gauges, dial thermometer, drain and fill valves, and ground pads. The design incorporates padlock provisions, lacks arresters, and is configured for standard electrical infrastructure applications.
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Text version
SALIENT CHARACTERISTICS
FOR
750 kVA Transformers
Revised:
4 September 2025
Detail Description kVA 750kVA 3 Phase Temp Rise 65-degree average winding rise Cooling Class KNAN Insulating Fluid Envirotemp FR3 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 Copper Winding Material Copper
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