| 摘要 |
A trip device of an earth leakage circuit breaker is provided to secure safety of the earth leakage circuit breaker by having a button protruded in trip of the earth leakage circuit breaker to allow a user to recognize cut-off of power. An overcurrent trip unit(20) has two bimetals of which one ends are connected to a power connection terminal and a driving trip bar(24) with upper and lower insertion grooves to insert the other ends of the bimetals. A zero-phase current transformer(70) is installed between the two bimetals. An operating trip bar(40) is placed at the other side of the driving trip bar, mounted to an axis(43) of a case(10), and rotated around the axis by vertical movement of the driving trip bar. A leakage current trip unit(50) is mounted on an upper part of the overcurrent trip unit and has a printed circuit board(51) with a trip circuit which pulls an upper end of the operating trip bar to rotate the operating trip bar around the axis at a predetermined angle. A contact bus(100) is mounted on the other side of the operating trip bar. One end of a pressing plate is mounted on a stopping protrusion(42) of the operating trip bar, and the other end thereof is mounted on a pushing plate of the contact bus to press the operating trip bar and the contact bus. The pressing plate releases pressing by being separated from the stopping protrusion during rotation of the operating trip bar. A handle(80) is connected to the pressing plate to press the pressing plate.
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