Patent ID: 7164996
Filing Date: 2007-01-16
Classification: H02H

Abstract:
1. A power breaking apparatus for prevention of electrical shock, comprising: a leakage voltage sensor for sensing a leakage voltage, the leakage voltage sensor including a plurality of leakage voltage sensor rods; a power break signal generation unit for generating a ground current if the leakage voltage sensor sensed the leakage voltage, and producing transient and short current, in order, every time a predetermined time lapses; a zero phase sequence current transformer (ZCT) and current transformer for detecting ground current, transient and short currents, which are generated according to operations of the power break signal generation unit; a delay for performing a control operation to break the AC power if a zero phase sequence current transformer (ZCT) and current transformer detects the ground current, the transient current and the short current; a circuit breaker for breaking the AC power according to a control of the relay; and a magnetic switch for breaking the AC power according to a control of the relay.