Reverse transformation
Reverse transformation
(OP)
At 15 kV generator test cell there is a MV connection panel with circuit breaker. Generator wires are connected to CB line side. There is also a voltage measuring transformer in that panel. Between tests, (without test specimen) the power leads are hanged on the wall mounted hooks. The CB is open. The test power leads seem not to be connected on both ends. Now the question: is there a chance that the measuring transformer being fed from secondary side circuits (reverse excitation?), could develop a MV potential on the primary, thus making test leads energized? If this is a possibility, what would the safety measures to protect operators?






RE: Reverse transformation
Air gap on the low side of the VT.
RE: Reverse transformation