On the market, forCircuit breakers and circuit breakersEveryone is confused, but in reality, are the two products still different? We have invited an electrical engineer from Weikewei to explain and analyze today. Below are the specific professional explanations. The main function of a molded case circuit breaker (MCCB) is to provide protection against overload and short circuit in low-voltage distribution systems and motor protection circuits. Due to its reliability and stability, it has become a widely used product in industry. Miniature circuit breakers (MCBs) are also widely used and numerous circuit breaker products, mainly used to provide protection for building electrical terminal distribution equipment. As both belong to circuit breakers, and molded case circuit breakers are often used for small capacity switching, it is very practical and important to understand the differences between the two and choose the appropriate product. Here is a brief explanation. Let's talk about the basic similarities first, because both belong to circuit breakers and require compliance with some basic product standards, with the same working principle. Next, let's talk about the difference between the two,

Overall, there are the following points: 1. Different electrical parameters 2. Different mechanical parameters 3. Different working environments. In addition, from the perspective of selection, specifically, there are several differences between the two. The current level of plastic shell circuit breakers is up to 2000A, while the maximum current level of miniature circuit breakers is within 125A. Due to the difference in capacity between the two.

In specific work, the effective area of molded case circuit breakers is also larger than that of miniature circuit breakers, and the connected wires are also relatively thick, reaching more than 35 square meters, while miniature circuit breakers are only suitable for connecting wires of less than 10 square meters. So generally, for indoor situations, larger rooms are more suitable for choosing molded case circuit breakers. The installation method of molded case circuit breakers mainly relies on screw installation, which is easy to tighten, has good contact, and runs stably. And miniature circuit breakers are mainly installed through guide rails, sometimes causing poor contact due to insufficient torque. Due to the different installation methods of the two, the installation of molded case circuit breakers is more stable and less difficult than that of small circuit breakers. From the perspective of operation and lifespan. The molded case circuit breaker adopts two sets of devices for overcurrent and short circuit protection, and the overcurrent protection action value can be manually adjusted for convenience and speed. However, miniature circuit breakers share the same device for overcurrent and short circuit, and the current cannot be adjusted, which often leads to unresolved issues. Plastic shell circuit breakers have a large distance between phases and are equipped with arc extinguishing covers. They have strong arc extinguishing capabilities, can withstand larger short-circuit currents, and are less likely to cause phase to phase short circuits, resulting in a longer service life than miniature circuit breakers. In this aspect, the flexibility of use is more prominent in molded case circuit breakers, which have better flexibility in setting than miniature circuit breakers. The overcurrent and short-circuit protection devices of molded case circuit breakers are independent of each other, and the action value of overcurrent protection can be flexibly adjusted during use. The overcurrent protection and short-circuit protection of miniature circuit breakers are unified devices, and there are certain shortcomings in the flexibility of adjustment. Based on the above situation, it seems that miniature circuit breakers are at a disadvantage, but in fact, for certain times, it is still necessary to choose miniature circuit breakers. For example, when it is necessary to improve the safety of the circuit, miniature circuit breakers have high sensitivity and fast breaking action, which is more conducive to the protection of the circuit and electrical appliances. From this, it can be seen that both have their own advantages and suitable applications. The key is to fully understand the differences between molded case circuit breakers and miniature circuit breakers, and choose according to one's own needs.

If there is more product information that needs to be further understood and compared, you can contact the technical personnel of Weikewei factory, who will provide you with professional answers and conclusions.