ELCB

      The circuit breaker produced by our company is made up of plastic shell, over-current release, operating mechanism, contact and arc extinguishing system. The shell is made of high strength and high flame retardant plastic injection molding. The multi pole circuit breaker is assembled by several single rods, and the tripping is connected with the connecting rod, and the handle is connected with the connecting rod cover, so as to ensure the consistency of each disconnection.

      Classification

    1.Only with the function of leakage protection and power off, it must cooperate with fuse, thermal relay, overcurrent relay and other protective elements.

    2.Only with the function of leakage protection and power off, it must cooperate with fuse, thermal relay, over-current relay and other protective elements, and also has overload protection function.

    3.Only with the function of leakage protection and power off, it must cooperate with fuse, thermal relay, over-current relay and other protective elements, and also has short-circuit protection function.

    4.Only with the function of leakage protection and power off, it must cooperate with fuse, thermal relay, over-current relay and other protective elements, and has overload and short circuit protection function.

    5.Only with the function of leakage protection and power off, it must cooperate with fuse, thermal relay, over-current relay and other protective elements, and has the functions of short circuit, overload, leakage, overvoltage and undervoltage.

 Matters needing attention

     1.The neutral line N of the protection circuit of the leakage protector should pass the zero sequence current transformer. Otherwise, after the connection, there will be an unbalanced current to make the leakage protector misoperation.

     2.The neutral line N and the protective line (PE) behind the leakage protector can not be combined into one. If the two are merged into one, when the leakage fault or human shock, leakage current through the current transformer backflow, the results are similar to the situation (3), resulting in leakage protection device refused to move.

    3.The zero connection protection line (PE) is not allowed to pass zero sequence current transformer. Because the protection line (PE) passes the zero sequence current transformer, the leakage current passes through the PE protection line and then passes through the zero sequence current transformer, which causes the current to cancel, and the transformer does not detect the leakage current value. When the fault occurs, the leakage protector does not act, and can not play a protective role.