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INC77B Negative Phase Sequence Time Overcurrent Relay
Type INC77B - Negative-Phase-Sequence TOC Relay
NEGATIVE-PHASE-SEQUENCE TIME OVERCURRENT RELAY - Type INC77N
INC77R Negative Phase-Sequence Overcurrent Relay
INC51A Negative Phase Sequence Time Overcurrent Relay
NEGATIVE-PHASE-SEQUENCE TIME OVERCURRENT RELAY TYPE INC77F