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Medium-voltage transformers
Envirotran critical load three-phase pad-mounted transformer
Serial Number Verified :
The product is verified as being authentic; however, this does not guarantee the condition or fit for purpose of the product.


Base kVA
45 kVA to 12,000 kVA
Primary voltage
2400 V to 46,000 V
Secondary voltage
120 V to 24,940 V
Basic Impulse Level (BIL)
30kV to 250kV


C57.12.00 and C57.12.34
NEMA (sound level)
Third-party approval/recognition
FM Global (Indoor & Outdoor), UL/cUL – available for most ratings


Compartmental type
Tamper resistance
Tthree-point latching and padlock system with recessed penta-head bolt
Enclosure integrity
Meets or exceeds ANSI/IEEE C.57.12.28 and C57.12.29
Mild or stainless steel (304L)
Enclosure environment
Indoor ad outdoor
Insulating medium 
Hinge material
Stainless steel cabinet hinges and mounting studs

Key features

Distribution transformer Three-phase padmounted
Install location Indoor and outdoor
Power direction Step-down and Step-up
Fluid Envirotemp FR3 fluid or electrical grade mineral insulating oil (upon special request)
Tap changer De-energized tap changer, externally operable
Terminations Sidewall-mounted high-voltage porcelain bushings
Sidewall-mounted low-voltage molded epoxy bushings with NEMA spades
Tank features Tank bases designed for skidding or rolling in any direction
Extra-heavy, welded-in-place lifting lugs and jack pads (4)
Grounding Stainless steel grounding pads (4)
Cooling Cooling radiators are welded directly to the tank
Removable radiators (optional)
Standrd gauges Dial-type thermometer
Dial-type liquid level gauge
Pressure vacuum gauge
Cover mounted automatic pressure relief device
Pressure test connection
Drain/fill valve 1” upper fill plug with filter press connection
1” drain valve with sampler combination (2500 kVA and below)
2” drain valve with sampler (over 2500 kVA)
1” upper filter valve (over 2500 kVA)
Paint color Painted using ANSI #61 Light Gray; ANSI #70 Sky Gray; or special paint available per request
Nameplate Laser-scribed anodized aluminum nameplate
Stainless steel nameplate (optional)