Dry-type Transformer Outside
Dry-type Transformer Outside
(OP)
I want to put a 225 kVA dry-type transformer outside, which seems pretty ordinary. However, this transformer will only be energized when an outdoor emergency generator is running. I am concerned about moisture getting in the insulation during the long periods of non-use. Has anyone encountered such problems with a similar installation? If so what was done? Add heaters maybe?






RE: Dry-type Transformer Outside
RE: Dry-type Transformer Outside
RE: Dry-type Transformer Outside
We generally never put conventional dry-type transformers outdoors. A cast-coil transformer is a different story, but the oil-filled will be cheaper.
If you must, then certainly space heaters are an absolute necessity. I'd leave them on all the time.
RE: Dry-type Transformer Outside
I'm not aware of oil-filled or cast-coil transformers for 480-208V applications. That isn't stated in the O.P., but given the small size, it seems likely.
RE: Dry-type Transformer Outside
RE: Dry-type Transformer Outside
RE: Dry-type Transformer Outside
RE: Dry-type Transformer Outside
IF you can't use an oil filled xfmer then keep it energized all year or build a house for it.