Transformer Overload Capacity
Transformer Overload Capacity
(OP)
Could anyone refer me to a source which I can find info on xfrms overload capacity (especially liquid fill) based on their temperature rise capabilities?
I am told that 55deg xfrm overload is different from 65Deg and
55/65 deg transformer.
one is 112% the other one is 133%.
For long time pick up setting of an overcurrent protection on the secondary side of a transformer.
Thank you
I am told that 55deg xfrm overload is different from 65Deg and
55/65 deg transformer.
one is 112% the other one is 133%.
For long time pick up setting of an overcurrent protection on the secondary side of a transformer.
Thank you






RE: Transformer Overload Capacity
Regards
Marmite
RE: Transformer Overload Capacity
RE: Transformer Overload Capacity
At one time, I had a pamphlet from ABB (I think) regarding their recommendations for protection of their transformers. It showed the short-time overload ratings near that value, but for only several minutes or so. My suggestion is to find out your transformer manufacturer's recommendations.
Unless you have overtemp protection, your overload protection should be much closer to the FLA unless you want to void any manufacturer's warranty or disregard their recommendations.