JM3BD series intelligent molded case circuit breaker is one of the new circuit breakers developed and developed by our company with the introduction of international advanced design and manufacturing technology. Its rated insulation voltage is AC800V, suitable for AC 50Hz, rated working voltage AC400V, rated working current up to 800A for infrequent conversion and infrequent starting of the motor. The circuit breaker has overload long-delay inverse time, short-circuit short-delay inverse-time, short-circuit short-delay definite time, short-circuit instantaneous and under-voltage protection functions, which can protect lines and power equipment from damage.

The circuit breaker can be installed vertically (ie vertical installation) or horizontally (ie horizontal installation).

The circuit breaker cannot be reversed, that is, only 1, 3, and 5 can be connected to the power line, and 2, 4, and 6 can be connected to the load line.

This circuit breaker implements the following standards:

IEC60947-1 and GB/T14048.1 general rules;

Additional requirements for IEC60947-2 and GB/T14048.2 low-voltage circuit breakers and Appendix F circuit breakers with electronic overcurrent protection.