Control circuit for resetting drawout circuit breaker UVR soleno

Details Control circuit for resetting drawout circuit breaker UVR soleno Control circuit for resetting drawout circuit breaker UVR soleno

1981-05-29

1982-10-26

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit automatically reconnected only after the fault is...

361 71, 361 92, H02H 324

Patent

active

043565263

ABSTRACT:
A control circuit utilizes a system voltage monitoring control relay for applying a DC control voltage across a UVR solenoid and a voltage dropping resistor to maintain the UVR in its reset condition in the absence of an undervoltage condition. An RC network maintains the UVR reset condition for momentary dips in the system voltage. If the UVR does drop out to trip its circuit breaker, a second relay temporarily switches out the dropping resistor to render the control voltage capable of electromagnetically resetting the UVR. To accommodate drawout breaker applications, means is provided to sense when the UVR is reconnected to the control circuit pursuant to automatically initiating a UVR reset function via the second relay.

REFERENCES:
patent: 3590325 (1971-06-01), McMillen et al.
patent: 3740738 (1973-06-01), Kosanovich et al.
patent: 3936701 (1976-02-01), Wilson et al.
patent: 4011484 (1977-03-01), Paice et al.
patent: 4183071 (1980-01-01), Russell

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