PHASE COMPARISON RELAYING APPARATUS WITH TWO-COUNT BY-PASS CIRCUIT

摘要

A phase comparison unblocking relaying network which includes means to trip the circuit breaker upon the occurrence of a plural number of phase comparisons when the phase comparing information between the local and remote relaying stations has a lesser time overlap than the normal time for which the security timer is set and which will, in the event of a time overlap of a predetermined interval greater than said normal time interval, trip the breaker without waiting for more than one phase comparison.