Miniature circuit breaker (MCB) play a vital role in ensuring the safety and protection of household appliances and electronic equipment. Miniature circuit breakers are widely used to prevent overloads, short circuits and leakages, thereby protecting equipment from damage and reducing energy consumption. Their compact size, ease of installation, high reliability and cost-effectiveness make them an important component in electrical systems.
One of the key functions of MCBs is to provide short circuit protection. When a short circuit fault occurs and the current in the line is too large, the miniature circuit breaker uses the electromagnetic force generated by the electromagnetic coil to drive the iron core, push the push rod to unlock, and disconnect the circuit in a shorter time. time. Less than 0.1 seconds. This rapid response to short circuit faults helps prevent potential damage to equipment and ensures the safety of electrical systems.
In addition to short circuit protection, MCBs are also designed to provide overload protection. When the current in the line exceeds the rated current but is still lower than the set short-circuit current value, causing an overload fault, the thermal bimetallic element in the miniature circuit breaker bends and resists the lock, thereby breaking the circuit. The breaking time changes according to the size of the overload current, and different current sizes correspond to different degrees of delay. This feature helps prevent equipment from overheating and potential damage caused by overloading for extended periods of time.
When considering the breaking capacity of MCBs, it is important to note that they are designed to accommodate a range of short circuit breaking capacities. The rated short-circuit breaking capacity (Icn) of general small circuit breakers is usually 6A to 63A, of which the breaking capacity of 6A to 40A small circuit breakers is 6KA, and the breaking capacity of 50A to 63A small circuit breakers is 4.5KA. In addition, the operational short-circuit breaking capacity (Ics) is also specified to be 6KA for 6A to 40A miniature circuit breakers and 4.5KA for 50A to 63A miniature circuit breakers. These breaking capabilities ensure that miniature circuit breakers can safely interrupt circuits under a variety of short circuit conditions, adding a layer of protection to electrical systems.
MCB’s versatility and effectiveness make it an indispensable component for protecting household appliances and electronic equipment. Overload, short circuit and leakage protection capabilities not only protect equipment but also help reduce energy consumption. MCBs are small, simple to install, highly reliable and affordable, providing a cost-effective solution for ensuring the safety and protection of electrical systems. Whether it is a residential, commercial or industrial application, miniature circuit breakers are vital to maintaining the integrity and safety of electrical installations.
Mutai Group has accumulated more than ten years of manufacturing and sales experience in circuit breakers, contactors, dual power automatic transfer switches (ATS) and related fields. We eagerly look forward to the opportunity to work with you.
Post time: Dec-12-2023
