Overcurrent detector

Details Overcurrent detector Overcurrent detector

1991-05-29

1993-08-10

Voeltz, Emanuel T.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 37, 323902, 361111, H02H 712

Patent

active

052355055

ABSTRACT:
There are provided a resistor having a low resistance and inserted in a d.c. current path of which an overcurrent is detected, and a bias circuit for generating substantially a constant d.c. voltage. A voltage obtained by superposing a voltage across the resistor upon a voltage supplied from the bias circuit is monitored. When the monitored voltage reaches a predetermined threshold value, an overcurrent detection signal is generated by means of a photocoupler.

REFERENCES:
patent: 4158163 (1979-06-01), Eriksen et al.

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