Power transformer in storage
Power transformer in storage
(OP)
A 30 MVA oil filled transformer (115 kV) will be put onto the temporary pad with oil contentment for about 2 years, de-energized, in Canada. What considerations (re moisture, etc) should be given? Thank you.






RE: Power transformer in storage
Keith Cress
kcress - http://www.flaminsystems.com
RE: Power transformer in storage
An annual test of an oil sample isn't expensive. It shouldn't show any changes to a stored transformer, but who knows?
Any mechanical components such as load tapchanger mechanisms should be evaluated. A preservative coating might be needed.
It's a good idea to do a monthly visual check of the thing, just to make sure somebody hasn't backed a truck into it, or some other such catastrophe...
old field guy
RE: Power transformer in storage
As mentioned, if there are strip heaters in the control cabinets, these should be connected to power.
To be honest, the best thing would to energize it, but the key thing is to keep moisture out.
RE: Power transformer in storage
We had another case where we permanently energized a large spare transformer, and let it idle indefinitely (the Client did not mind paying for losses). This time we cannot consider that option (it is in a storage area) but I was even thinking of suggesting a crazy solution of permanently energizing it from the low voltage side (34.5 kV) with something like 3x208V and short the HV side...
RE: Power transformer in storage
Keith Cress
kcress - http://www.flaminsystems.com
RE: Power transformer in storage