Differential Relay Current Measurement (for Digital relays) DIFF Relay DIFF Relay DIFF Current Restrain Current Phase Measurement Measurement Id mA IR mA HV side current A side current A R Y B Sensitivity Test by swapping CT Terminals : Secondary measurements Diff. relay (HV Diff. ( side) Side HV Side Phase side) I I I sec. I pri. I sec. I (mA) T.B. T.B. pri. (mA) (mA) (A) (mA) (A) R Y B N Differential Relay Current Measurement (for Digital relays) DIFF Relay DIFF Relay Restrain DIFF Current Phase Measurement Measurement Current Id mA HV side current A side current A IR mA R Y B
Differential Relay Current Measurement (for Digital relays) Phase DIFF Relay Measurement HV side current A DIFF Relay Measurement side current A DIFF Current Id mA Restrain Current IR mA R Y B Sensitivity Test by swapping CT Terminals : Secondary measurements Diff. ( side) Diff. relay (HV side) Side HV Side Phase I (mA) T.B. I (mA) I sec. (mA) I pri. (A) I sec. (mA) T.B. I pri. (A) R Y B N Differential Relay Current Measurement (for Digital relays) Phase DIFF Relay Measurement HV side current A DIFF Relay Measurement side current A DIFF Current Id mA Restrain Current IR mA R Y B
tr_stability.docx