Overcurrent protection system with variable inverse-time charact

Details Overcurrent protection system with variable inverse-time charact Overcurrent protection system with variable inverse-time charact

1974-05-13

1976-03-23

Pellinen, A. D.

3171485B, H02H 308

Patent

active

039462811

ABSTRACT:
An overcurrent protection system has an adjustable inverse-time characteristic which may be varied at will. The output of the inverse-time characteristic determining circuit is coupled to a variable timing means which is used to further shift by a predetermined time the inverse-time characteristic of the system, thereby providing a greater variety of possible switching characteristics. Further provided is an adjustable return-to-zero circuit which still further varies the characteristics of the protection system.

REFERENCES:
patent: 3327171 (1967-06-01), Lipnitz et al.
patent: R25762 (1965-04-01), Kotheimer

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