In life, people widely use frame circuit breakers For circuit breakers, it is a common product and many people easily use frame circuit breakers and molded case circuit breakers. There are certain differences between the two. How to answer this question? This is still a question that needs to be asked by some experienced senior engineers who are very well versed in the industry. The following details the differences with moulded case circuit breakers.

The current rating of a frame circuit breaker is greater than the rated current of a moulded case circuit breaker and the rated current of the frame stage, which means it allows a greater current to pass through. Several manufacturers have already implemented 1600A) frame circuit breakers with high segmentation capacity and full functionality.

The MCCB is of plasticised construction. Inside the insulated chamber, it prevents phase short circuits, ensures that the arc is ejected upwards and guarantees reliable breaking of the contact system. The frame circuit breaker has a modular structure and is divided into a frame, a contact interrupting system, a manual operating mechanism, an electric operating mechanism, an intelligent controller and a drawer base. Each component becomes a complete independent part and can be fixed with only 1-2 screws during assembly. Dismantling and assembly is very easy and facilitates maintenance. The frame circuit breaker has a high sectional capacity and is fully functional. The moulded case circuit breakers are of plasticised construction.

Ensures that the arc is ejected upwards and that the contact system breaks reliably. The frame type circuit breaker has a modular structure and is divided into a frame, a contact interrupter system, a manual operating mechanism, an electric operating mechanism, an intelligent controller and a drawer base. Each component becomes a complete independent part and can be fixed with only 1-2 screws during assembly. Very easy to disassemble and facilitate maintenance. Moulded case circuit breakers are suitable for branch circuit protection switching. Frame circuit breakers have all components mounted in an insulated metal frame, which is usually open. Various accessories can be fitted. Contacts and components can be replaced more easily. Mainly used for power supply Terminal switches.

There are several types of overcurrent derailleurs such as electromagnetic derailleurs, electronic derailleurs and intelligent derailleurs. The circuit breakers have four levels of protection: long-delay, short-delay, instantaneous and earth fault. The rectification value of each protection is adjusted within a certain range according to its frame level. Both manual and electric operation are available. With the development of microelectronics technology, some intelligent circuit breakers are now equipped with area selection chain function, which fully guarantees the sensitivity and selectivity of the action.