Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids
Patent
1992-09-17
1995-03-07
Pellinen, A. D.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
For relays or solenoids
361 72, H02J 304
Patent
active
053963954
ABSTRACT:
Object of the present invention is to provide a controller for distribution apparatus which prevents extension of power failure.
In accordance with the controller for distribution apparatus related to the present invention, when a short circuit accident, for example, occurs in a control circuit for distribution apparatus, a breaker for distribution opens, an auxiliary coil becomes unexcited condition, and power failure is caused, but, an auxiliary contact point of the unexcited auxiliary coil closes in the other control circuit for distribution apparatus so as to excite a closing coil, and consequently, the other control circuit starts its operation immediately. Accordingly, extension of the power failure can be prevented and reliability of power supply can certainly be maintained.
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patent: 5077631 (1991-12-01), Cleary
patent: 5132867 (1992-07-01), Klancher
patent: 5162964 (1992-11-01), Higasa et al.
Fleming Fritz M.
Hitachi , Ltd.
Pellinen A. D.
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