Transformer Winding Resistance Test: Method and Limits
Inject DC, measure the voltage drop, divide. That’s the whole test on paper. In practice the reading climbs for ten minutes before it settles on a large unit. The value you write down is meaningless unless you also wrote down the winding temperature. The number your meter shows is not the resistance of the winding you think you… Read More: Transformer Winding Resistance Test: Method and Limits »