Fast power-fail detector for power supplies with energy hysteres

Details Fast power-fail detector for power supplies with energy hysteres Fast power-fail detector for power supplies with energy hysteres

1985-10-21

1987-12-15

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 66, 307 87, 307310, 328149, 361 92, 361 93, 324 77A, G01R 2316, H03K 520

Patent

active

047135530

ABSTRACT:
A system for rapidly detecting power disturbances with ferroresonant transformers having a decay profile comprising the steps of rectifying a power signal; comparing the rectified signal against a reference signal; comparing the rectified signal against a dynamic reference signal; and generating a power-fail signal in response to either comparison falling below its respective reference.

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