Patent ID: 7902696
Filing Date: 2011-03-08
Classification: H01H

Abstract:
1. A controlled switching device comprising: a voltage measuring means for measuring a power source voltage and a load voltage of a breaker; a frequency-phase calculating means for calculating a frequency and a phase of the power source voltage and the load voltage; a target-closing phase-map generating means for generating a target closing phase map based on pre-arc characteristics of the breaker, a mechanical action of the breaker, and amplitude fluctuations of the load voltage; a target-closing time calculating means for calculating a target closing time string based on the frequency and the phase of the power source voltage and the load voltage, and the target closing phase map; and a closing control means for controlling, when a close command is inputted to the breaker, a timing of an output of a closing control signal for instructing the breaker to start a closing operation based on a preset predicted closing time and the target closing time string.