Standby power supply

Details Standby power supply Standby power supply

1983-12-22

1985-12-24

Scott, J. R.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 86, H02J 906

Patent

active

045608873

ABSTRACT:
A relatively short-term standby power supply includes a relay which senses failure of the main AC power source, and in response to such a failure actuates contacts which turn on a first thyristor to connect a capacitor to the load. The capacitor has been charged to a higher voltage than the load requires and can consequently provide power to the load for a longer time period than would the same size capacitor charged to the normal operating voltage of the load.

REFERENCES:
patent: 3509357 (1970-04-01), Studtmann
patent: 4075503 (1978-02-01), Klett
patent: 4124103 (1978-11-01), Otto et al.
patent: 4238690 (1980-12-01), Clarke
patent: 4247913 (1981-01-01), Hiniker et al.
patent: 4335434 (1982-06-01), Baumann et al.
patent: 4454452 (1984-06-01), Feldstein
patent: 4488057 (1984-12-01), Clarke
patent: 4492876 (1985-01-01), Colbert et al.
"Specifying Uninterruptible Power Systems", by R. Caprigno et al, in Digital Design, Mar. 1983, pp. 88-91.

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