Power transmission line protective apparatus

Details Power transmission line protective apparatus Power transmission line protective apparatus

1982-12-13

1985-04-23

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Feeder protection in distribution networks

361 63, 361 87, H02H 328

Patent

active

045133409

ABSTRACT:
A fault detection and clearance system for paralleled electrically similar power transmission lines wherein at each end of the line matched separate directional relays respectively connected to trip associated fault clearance circuit breakers have polarized windings and operate windings. The polarized windings are energized by an alternating current proportional to the summation while the operate windings are energized by an alternating current proportional to the difference (phase considered) of fault currents going into the breakers in both lines at the adjacent end in the event of a fault.

REFERENCES:
patent: 2605325 (1952-07-01), Glassburn
"Directional Overcurrent Ground Relay Types KRP KRC and KRD" Westinghouse Manual No. I.L. 41-137C.
"Type HD Current Balance Relay" Westinghouse Manual No. I.L. 41-176.

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