Negative Resistance readings for current transformer tests
Negative Resistance readings for current transformer tests
(OP)
Just received results for a curent transformer test and resistance values are coming back negative (-0.95 ohms). Anyone know why this would happen?
Thanks.
Carl
Thanks.
Carl






RE: Negative Resistance readings for current transformer tests
Resistance was taken with a 4 wire method. 2 red (+) and 2 black leads (-). I'd check that first.
Additionally, there may be some residual magnetism on CT. Perform excitation test. Then resistance, then excitation test again.