Advanced latching circuit

Details Advanced latching circuit Advanced latching circuit

1986-12-12

1988-07-19

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Compressor protective circuits

361156, 361170, 361194, H02H 700

Patent

active

047589183

ABSTRACT:
An advanced latching circuit (14) is used for latching a compressor (16) to a power source (18). The circuit includes the solenoid (32) of a compressor relay. A first set of contacts (28) of the compressor relay, a capacitor (34) and a resistor (36) are connected in parallel with each other and in series with the solenoid (32). Power supplied to the latching circuit (14) with the capacitor discharged energizes the solenoid (32) and latches the circuit. The opening of the latching circuit (14) by a safety switch (38, 40) deenergizes the solenoid to disconnect the compressor from its power source and charges the capacitor (34). The solenoid cannot be reenergized to reactivate the compressor until service personnel remedy the heat pump malfunction and interrupt power to the latching circuit (14).

REFERENCES:
patent: 3387188 (1968-06-01), Euler
patent: 3456164 (1969-07-01), Sternberg
patent: 4291359 (1981-09-01), Dieterle

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