Molded case circuit breakers, It can automatically disconnect the circuit when a circuit fault occurs, protecting electrical equipment and personal safety. The circuit breaker has the advantages of easy installation, reliable use, beautiful appearance, etc., and is widely used in power systems in residential, commercial and industrial buildings.

 

 

Scope of application

Molded case circuit breakers are composed of plastic shells, contacts, springs, conductive materials and other components. Molded case circuit breakers have a variety of rated currents and rated voltages to choose from, which can adapt to different types of electrical equipment, and have overload and short-circuit protection functions, which can effectively prevent fire and electrical damage caused by circuit overload and short-circuit

Molded case circuit breakers (hereinafter referred to as circuit breaker) is mainly used for power distribution with AC 50Hz (or 60Hz), rated insulation voltage 800V (HGM1-63 is 690V), rated working voltage 690V and below, rated current 1600A and below In the network, it is used as overload, undervoltage and short circuit protection for distributing electric energy and protecting lines and power supply equipment. Under normal circumstances, it can be used for infrequent switching of lines and infrequent starting of motors. The product complies with: IEC60947-2, GB/T140482 standard.

Note: 1. The circuit breaker used to protect the motor is represented by 2.

2. For A/B type, the N pole is not equipped with an over-current release; for C/D type, the N pole is installed with an over-current release; for A/D type, the N pole is always connected.

 

 

 

Note: 1) There is no code for direct operation of the handle, P for electric operation, and Z for rotary handle operation.

2) The circuit breaker for power distribution has no code, and the circuit breaker for protecting the motor is represented by 2.

3) There is no code for three-pole products, and A, B, C, D for four-pole products.

Type A: No overcurrent tax and components are installed on the N pole, and the N pole is always connected, and does not close and open with other three poles;

Type B: No overcurrent tripping element is installed on the N pole, and the N pole is closed and opened together with the other three poles;

Type C: Overcurrent tripping elements are installed on the N strands, and the N pole is closed and opened together with the other three poles;

Type D: N suction is installed with an over-current tripping element, and the N suction starts to discharge, and does not close and open with other three poles

 

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