Dry type transformer abnormal heating
Dry type transformer abnormal heating
(OP)
hi guys, i hope you can help me on this one. We have a 175 KVA, 480/240v, 3phase, 60 Hz. 65 degrees C rise, delta/wye neutral ungrounded dry type transformer with 15 % load and 40% unbalance. The unit is showing abnormal heating of 45 degrees C as shown by IR scan. Megger readings is 200 Megs average between high and low side to ground. Likewise, there is abnormal vibration.
Is the unbalance causing the abnormal heating considering that the load is only 15%? How much unbalance can a transformer take without overheating?
would appreciate your help.
capuchi
Is the unbalance causing the abnormal heating considering that the load is only 15%? How much unbalance can a transformer take without overheating?
would appreciate your help.
capuchi






RE: Dry type transformer abnormal heating
RE: Dry type transformer abnormal heating
RE: Dry type transformer abnormal heating
thanks for your response. just for general guidance, how much load unbalance can a transformer take or is tolerable without causing damage to the unit itself.
again your help will be appreciated.
capuchi
RE: Dry type transformer abnormal heating
In any case, if the transformer temperature is within limits, there shouldn't be any significant damage which would change the normal lifespan of the unit.
RE: Dry type transformer abnormal heating