Safety device for a differential protection apparatus

Details Safety device for a differential protection apparatus Safety device for a differential protection apparatus

1987-08-14

1988-04-05

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 46, H02H 326

Patent

active

047362650

ABSTRACT:
The invention provides a safety device for an electric installation protection apparatus, comprising a residual differential current detector through which pass a phase conductor and a neutral conductor, and a processing circuit supplied by a rectifier bridge and connected to the phase and neutral conductors. It further comprises biasing and safety circuits formed by a static bidirectional switch connected between a ground connection and the AC terminals of the rectifier bridge.

REFERENCES:
patent: 3895264 (1975-07-01), Kirilloff
patent: 4598331 (1986-07-01), Legatti

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