04-03-2017, 04:19 PM
Leave it on for a while with full line voltage applied and see if it gets warm. I don't know the normal unloaded current draw but some is normal.
The transformer is an inductor, and as such it will draw some magnetizing current. Since with an inductor the current is not in phase with the applied AC voltage, it is reactive current and not indicative of any "real" power being dissipated. The transformer should therefor not get very warm with no load. If it does, then real power is being dissipated and it has a problem.
The transformer is an inductor, and as such it will draw some magnetizing current. Since with an inductor the current is not in phase with the applied AC voltage, it is reactive current and not indicative of any "real" power being dissipated. The transformer should therefor not get very warm with no load. If it does, then real power is being dissipated and it has a problem.
