Patent ID: 7616419

Claim:
A switchgear control apparatus for controlling opening/closing operation of a circuit breaker of a switchgear which disconnects and reconnects a power transmission line under no-load conditions, said switchgear control apparatus comprising: a voltage sensor for detecting an AC voltage on a power source side of said circuit breaker; a current transformer for detecting a main circuit current flowing through said circuit breaker; a contact opening time sensor for detecting contact opening time of a main contact of said circuit breaker at interruption of the power transmission line; an interruption time sensor for detecting interruption time at which the main circuit current flowing through the circuit breaker has been interrupted based on an output of said current transformer and the contact opening time detected by said contact opening time sensor; and a reclosing time decider for determining reclosing time at which the main contact of said circuit breaker should be reclosed for reconnecting the power transmission line based on an output of said voltage sensor, the output of said current transformer and the interruption time detected by said interruption time sensor.