AIR CIRCUIT BREAKER WITH SAFETY MECHANISM ON SEPERATING AUXILIARY COVER

摘要

An air circuit breaker is provided to protect a user from electrical accident when the user separates an auxiliary cover in order to separate an over-current trip relay by allowing the separation of the auxiliary cover only in case of pushing an off-button. An air circuit breaker(100) comprises an off-button(106). The off-button is for manually manipulating the air circuit breaker to circuit break location. An on-button(105) is installed at the right side of the off-button. An on-button is for manually manipulating the air circuit breaker to the inserting position. The air circuit breaker is connected to a main cover and is supported. The main part cover covers the whole side of an over-current trip relay(104). An auxiliary cover(103) is separated from the main part cover in off operation of the off-button. A separation blocking unit(115) is installed at a separation channel.