Protective relaying devices

Details Protective relaying devices Protective relaying devices

1979-10-22

1982-02-02

Miller, J. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Feeder protection in distribution networks

361 62, H02H 338

Patent

active

043143016

ABSTRACT:
In a protective relaying device comprising first and second potential transformer circuits for transforming voltages of an electric power system, first and second relaying elements are further provided for receiving the output voltages of the first and second potential transformer circuits, respectively so that each of the relaying elements delivers an output of a particular logic state when it operates. When the outputs of the first and second relaying elements coincide with each other, a logic circuit receiving the outputs delivers a tripping signal to a circuit breaker.

REFERENCES:
patent: 3697811 (1972-10-01), Little
"Practical Technique on Relaying Device", F. Ando, Published by Sha on Jul. 20, 1976, pp. 124-125.

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