Abnormality detecting device

Details Abnormality detecting device Abnormality detecting device

1982-10-25

1985-01-29

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 98, 307352, H02H 308

Patent

active

044970102

ABSTRACT:
An abnormality detecting device for detecting whether a load is in a normal condition or not, comprises a switch connected with the load in series, a control for the switch to apply a test voltage to the load for a time so short that the switch is not damaged even when the load is in a condition of short circuiting, a detector for detecting a current through the load upon application of the test voltage, a circuit for sampling and holding the detection signal, and a comparator for comparing the sampled detection signal with a predetermined abnormality value. The detecting device is particularly suited for detecting short-circuit conditions such as in a copying machine.

REFERENCES:
patent: 4019096 (1977-04-01), Bullinga
patent: 4065802 (1977-12-01), Mizvkawa et al.
patent: 4073009 (1978-02-01), Andow et al.
patent: 4370571 (1983-01-01), Andow et al.

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