Backup protection switch to prevent reverse power flow in a UPS

Details Backup protection switch to prevent reverse power flow in a UPS Backup protection switch to prevent reverse power flow in a UPS

1987-09-21

1988-08-09

Beha, Jr., William H.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 46, 307 86, 361 84, H02J 904

Patent

active

047630132

ABSTRACT:
A UPS system includes a backup input line isolation switch and control circuit for energy flow in the UPS is operative, during operation of the reserve energy source portion of the power supply in supplying power to the output, to provide mechanical isolation between the primary energy source connected to the input line and the secondary energy source upon detection of a failure of an electronic isolation switch normally providing isolation between te input line and the secondary energy source or an output of the UPS.

REFERENCES:
patent: 3614461 (1971-10-01), Speer et al.
patent: 3971957 (1976-07-01), Hase
patent: 4400624 (1983-08-01), Ebert
patent: 4506766 (1985-03-01), Watanabe
patent: 4598330 (1986-07-01), Woodworth

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