The environmental molded case circuit breaker is mainly used to distribute electric energy and protect the circuit and power equipment from overload, short circuit, under voltage and other faults. Equipment maintenance procedures are the requirements and regulations for daily maintenance of equipment. It can extend the service life of equipment and ensure safe and comfortable work by adhering to the equipment maintenance regulations. The main contents of the project shall include:

（1）须严格按说明书规定安装塑壳断路器；

(1) The molded case circuit breaker shall be installed strictly according to the specification;

ABB塑壳断路器代理

（1）安装前要对铭牌上的参数与实际需要是否相符，将断路器垂直固定在安装板上。

(1) Before installation, check whether the parameters on the nameplate are consistent with the actual needs, and fix the circuit breaker on the installation plate vertically.

（2）断路器在投运前，要仔细检查固定连接部分是否牢固，并保证操作机构处于灵活状态。

(2) Before the circuit breaker is put into operation, it is necessary to carefully check whether the fixed connection part is firm, and ensure that the operating mechanism is in a flexible state.

（3）断路器出厂时已确定准确，使用中可随意调节。线路发生过载或短路故障断路器动作后，应先排除故障，再进行合闸操作。

(3) The circuit breaker has been determined accurately when leaving the factory and can be adjusted at will during use. In case of overload or short-circuit fault, the circuit breaker shall remove the fault before closing.

（4）断路器在使用期间应进行周期性检查，要定期对传动部分加润滑油，同时清 除外壳灰尘，消 除灭弧室内壁和侧片上的金属颗粒及黑烟灰。

(4) The circuit breaker shall be inspected periodically during use. The transmission part shall be lubricated regularly. Meanwhile, the dust of the shell shall be removed, and the metal particles and black soot on the wall and side pieces of the arc extinguishing chamber shall be eliminated.

（5）塑壳断路器在日常维护保养中，不许拆卸零部件，发现异常立即停车，不允许带病运转；

(5) During daily maintenance, plastic case circuit breaker shall not be disassembled, and stop immediately if abnormal, and operation with defects is not allowed;

（6）非工作时间应加护罩，长时间停歇，应定期进行擦拭，润滑、空运转；

(6) The shield should be added during non working hours, and it should be wiped, lubricated and idled regularly when it stops for a long time;

（7）附件和专用工具应有专用柜架搁置，保持清洁，防止研伤，不得外借。

(7) Accessories and special tools shall be set aside with special cabinet frame, keep clean, prevent research injury and shall not be borrowed.

塑壳断路器的日常维护保养是设备维护的基础工作，必 须做到制度化和规范化。对设备的定期维护保养工作要制定工作定额和物资消耗定额，并按定额进行考核，塑壳断路器定期维护保养工作应纳入车间承包责任制的考核内容。

The daily maintenance of MCCB is the basic work of equipment maintenance, which must be institutionalized and standardized. The regular maintenance of equipment shall be determined with work quota and material consumption quota, and assessed according to the quota. Regular maintenance of molded case circuit breaker shall be included in the assessment content of workshop contract responsibility system.