Circuit arrangement for actuating electromagnetic switchgear

Details Circuit arrangement for actuating electromagnetic switchgear Circuit arrangement for actuating electromagnetic switchgear

1983-10-07

1986-01-07

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361154, 361198, H01H 4718

Patent

active

045637210

ABSTRACT:
The invention relates to a circuit arrangement for actuating exciting coils for electromagnetic switchgear. A transistor is connected in series with the exciting coil, as an electronic switch. Parallel with the series connection are a capacitor and a clock generator, which opens and closes the transistor with a certain frequency. Thereby, upon opening, a defined turn-off delay of the electromagnetic switchgear, and upon switching on, with the use of a timing element which at first deactivates the clock generator, the effect of a d-c saver circuit for electromagnetic switchgear can be achieved.

REFERENCES:
patent: 3683301 (1972-08-01), Boley et al.
patent: 4214290 (1980-07-01), Sloan
patent: 4376476 (1983-03-01), Hagiri
"7PU20-The New Electronic Time Relay"-Vester Siemens Power Engineering Product News 1, (1981), p. 11.
Siemens Catalog NS 2, (Jan. 1974).

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