12 MVA substation transformers

A 12 MVA three-phase transformer carries 1,665 A at 4.16 kV, 556 A at 12.47 kV and 502 A at 13.8 kV at full load.

Every unit is tested before it ships and delivered by us.

20 listings

Full-load current of a 12 MVA transformer

Three-phase, at the usual line-to-line voltages: the rating in VA divided by √3 and the voltage.

VoltageFull-load current
2.4 kV2,887 A
4.16 kV1,665 A
12.47 kV556 A
13.2 kV525 A
13.8 kV502 A
24.94 kV278 A
34.5 kV201 A
69 kV100 A
115 kV60.2 A
138 kV50.2 A

Work it out at another voltage with the kVA to amps calculator.

Questions about used 12 MVA substation transformers

How many amps is a 12 MVA transformer?

A 12 MVA three-phase transformer carries 1,665 A at 4.16 kV, 556 A at 12.47 kV and 502 A at 13.8 kV at full load. Full-load current is the rating divided by √3 times the line-to-line voltage: 12,000,000 VA ÷ (1.732 × 4160 V) = 1,665 A.

What 12 MVA substation transformers does Arcbarn have for sale?

Arcbarn has 20 listings, by makers including Westinghouse, GE and Virginia Transformer. All 20 are priced on request.

How much does a 12 MVA substation transformer weigh?

The 8 listed here with a weight run from 27,650 lb to 112,854 lb.

What tests does Arcbarn run on a used 12 MVA substation transformer?

Every unit is tested before it ships: turns ratio (TTR) on every tap; insulation resistance; winding resistance; power factor and capacitance; oil sample: dissolved gas analysis and dielectric strength; tap changer inspection and operation. You see the report before you buy.