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US08310111B2 Switching phase offset for contactor optimization 有权
用于接触器优化的开关相位偏移

Switching phase offset for contactor optimization
Abstract:
A system and methods providing for minimizing the arc energy delivered to the pads of a plurality of contactors using a single control coil based on monitoring the electrical sine waves of the three alternating current electrical poles and calculating the instant to energize or deenergize a single control coil. The remainder of the contactors will make or break based on an offset in time from the making or breaking of the control contactor.
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