Alternating current limiting apparatus

Details Alternating current limiting apparatus Alternating current limiting apparatus

1984-01-17

1986-01-28

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Impedance insertion

H02H 902

Patent

active

045675384

ABSTRACT:
An alternating current limiting apparatus is disclosed which normally forms first and second series circuits connected in parallel with each other between different kinds of power system lines. The first series circuit is resonated with a reactor and a capacitor at a line frequency to directly interconnect the power system lines. The second series circuit is composed of a capacitor or a reactor and two resistors. Between the interconnection of the reactor and the capacitor of the first series circuit and the interconnection of both resistors, a closing device is connected. Upon the occurrence of a fault of either of the power systems, the closing device is thereby actuated to form a parallel resonance circuit with the combination of the reactor or capacitor of the first series circuit and the capacitor or reactor of the second series circuit to limit current flowing between the power system lines. The resistor included in the parallel resonance circuit serves to damp a circulating current while the other resistor serves to lighten the interruption duty of a circuit breaker inserted in the power system lines.

REFERENCES:
patent: 3418532 (1968-12-01), Becker
patent: 4158864 (1979-06-01), Kennon

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