Over Voltage Ground Relay Activation
Over Voltage Ground Relay Activation
(OP)
The phase to phase voltages are consistent with each other. The phase to neutral voltages are not constant.
The system is ungrouded system.There is no ground fault but the numerical ground over voltage relay gets activated.
The Potential transformer connected is of star-star (grounded at both sides). The Phase voltage measured at
the secondary of the potential transformer is constantly fluctuating but the phase to phase voltages are normal. Is it ferro resonance effect?
The system is ungrouded system.There is no ground fault but the numerical ground over voltage relay gets activated.
The Potential transformer connected is of star-star (grounded at both sides). The Phase voltage measured at
the secondary of the potential transformer is constantly fluctuating but the phase to phase voltages are normal. Is it ferro resonance effect?






RE: Over Voltage Ground Relay Activation
RE: Over Voltage Ground Relay Activation
"Mostly just ignore the phase-ground voltages as long as none of the phases are solidly at zero volts to ground"
I cannot ignore this as it is operating the 59N element in the protection relay.
RE: Over Voltage Ground Relay Activation