Mainly from the distribution system to talk about the difference between the molded case circuit breaker and frame circuit breaker (also called universal circuit breaker), so that we know more about the information of the circuit breaker and save time and effort when buying and selling.

In general business, the frame for the circuit breaker is mostly we as a distribution management system of the main switch. Frame circuit breaker selection is also generally known as China open circuit breaker or a universal circuit breaker, operation learning way there are many such as hand-operated, mechanical lever operation, storage type, non-storage type, as well as the development of electric type and other forms of operational activities. According to the method of installation and use method can be divided into two types of fixed and drawer type, fixed shell is the use of different metal nano-materials, the appearance of the size of the impact of the larger, the level of protection and safety level is lower. While the drawer type is through the use of information engineering construction plastic shell, the structure of the problem is more simple and compact, high level of protection risk, more convenient maintenance. According to the characteristics of the protection environment, frame circuit breakers can be divided into non-selective (Class A) and selective (Class B), Class B circuit breakers more electronic overcurrent decoupler, with long delay, short delay and instantaneous action data protection three protection of their own characteristics. Intelligent frame circuit breaker built-in single-chip computer, with important display, alarm, self-test and communication service functions. It can monitor the network system with the industrial control machine components. The most useful features of the frame circuit breaker are large capacity, high limit segmentation teaching capacity and sufficient short-time withstand current, such as DW17 type circuit breaker with rated output current efficiency up to 5000A and rated short-time withstand current density up to 100KA, which makes the knowledge frame circuit breaker has good selectivity and stability.

Also because of these excellent characteristics, frame circuit breakers are more expensive and are used as main switches in low-voltage distribution systems and for the protection of critical trunk lines and large motors with large loads.

Plastic case circuit breakers, also known as device circuit breakers, have all components enclosed in a plastic case, plus auxiliary contacts, undervoltage derailleurs and parallel derailleurs for modular use. Due to the very compact structure, the maintenance of plastic case circuit breakers requires very professional technical support. Operation is mostly manual, with electric switching options available for large capacities. Due to the application of electronic overcurrent release devices, moulded case circuit breakers can also be divided into two categories: Class A and Class B. Class B has good three-stage protection, but the price factor means that Class A electromagnetic release products have a higher market share.

Moulded case circuit breakers are characterised by their small size, good contact protection, ease of installation and use, and low price. In terms of small and medium-sized power distribution, moulded case circuit breakers can fully meet the requirements.

The above is about the case circuit breaker and frame circuit breaker two different teaching content between each other will be introduced here first. But here we remind everyone, whether the enterprise choose a frame circuit breaker, or molded case circuit breaker, the main problem also needs to be determined by combining the actual development of the students themselves, the need for rated amperage in the following 1500A aspect and a relatively high quality and environmental adaptability, then Taisi Electric molded case circuit breaker completely information can be based on competent.