Whether it is molded case circuit breaker or isolated circuit breaker, are perennial and electricity to deal with, electricity is a double-edged sword with a very easy to hurt. In order to reduce the occurrence of accidents and everyone's safety, or to let you understand the installation and maintenance of molded case under the casing precautions.
Molded case circuit breaker are mainly used to distribute electrical and protective lines and power equipment from overload, short circuit, under voltage and other fault damage. Installation and maintenance should pay attention to the following matters.
(1) The installation of the front waist on the nameplate on the parameters and the actual needs are consistent, the circuit breaker is fixed on the mounting plate.
(2) Before the board wiring, the choice of the corresponding cross-sectional area of ​​the wire, stripped of the right length of the outer insulation layer, insert the wire hoop hole, the coil hoop outer packing, packing wire. Then, connect the connecting hole of the wire hoop to the circuit breaker terminal with screws. When connecting copper, the wiring board should be fixed on the circuit breaker, then fixed with the copper. Board wiring should be strictly in accordance with the requirements of the instructions bet on the wiring board.
(3) Before the commissioning of the Molded case circuit breaker, carefully check whether the fixed connection part is firm and ensure that the operating mechanism is in a flexible state.
(4) Circuit breaker factory has been identified accurately, in use it can be adjusted. Line overload or short circuit fault circuit breaker action, you should first troubleshoot, and then closing operation.
(5) The mccb circuit breaker should be periodically inspected during use. Regularly add lubricating oil to the transmission part and remove the dust from the shell to eliminate the metal particles and black ash from the inner wall of the arc chamber and the side panel.