Trip system

Details Trip system Trip system

1983-07-11

1984-05-08

Salce, Patrick R.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361170, 361210, 361 1, 307219, 307116, 376215, 376259, 324415, H02H 104

Patent

active

044478518

ABSTRACT:
A trip system comprises groups of three switches, each group being responsive to a single trip initiating event and each switch switching a different phase of a three phase power supply. Three trip actuators are each connected between different pairs of switches. Malfunction of a single switch in any group will not cause a trip to occur while concurrent operation of two or more switches in any group will cause a trip.

REFERENCES:
patent: 2668934 (1954-02-01), Nierman
patent: 2973458 (1961-02-01), Nye
patent: 3223590 (1965-12-01), Troeger
patent: 3425903 (1969-02-01), Bevilacqua
patent: 3748540 (1973-07-01), Eggenberger et al.

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