Molded case circuit breaker(MCCB) is a commonly used equipment for electrical protection

A molded case circuit breaker (MCCB) is a type of electrical protection device that is commonly used in low-voltage distribution networks. Distinct from traditional metal-encased circuit breakers, its main characteristic is the use of insulating plastic for the outer casing, hence the name "molded case circuit breaker." This design offers improved insulation and safety features.

The primary functions of a molded case circuit breaker include:

1. Overload Protection: When the current in a circuit exceeds the rated current of the device, the molded case circuit breaker automatically cuts off the power, preventing cable overheating and fire risks due to overload.

2. Short Circuit Protection: In the event of a short circuit, the molded case circuit breaker can quickly disconnect the circuit, protecting it from damage.

3. Isolation Function: During maintenance or inspection of electrical equipment, the molded case circuit breaker can be used as a safety isolation switch.

Additionally, they may have the following characteristics:

- Adjustable Protection Parameters: Some models of molded case circuit breakers allow users to adjust the threshold for overload protection according to actual needs.
- Modular Design: Convenient for installation and maintenance.
- Variety of Rated Current Options: Suitable for electrical devices of different scales.

Because of their reliability and flexibility, molded case circuit breakers are widely used in industrial, commercial, and residential buildings, especially in situations where higher safety standards are required.