The miniature circuit breaker, also known as miniature circuit breaker, is suitable for overload and short circuit protection of lines with AC 50/60Hz rated voltage of 230/400V and rated current of 63A. It can also be used for infrequent operation and switching of lines under normal conditions.
The miniature circuit breaker mainly has the following characteristics.
1. The rated short-circuit breaking capacity is high, and some rated current levels can reach above 10KA.
2. The double wiring function can facilitate the connection of standard bus bars and flexible conductors.
3. With finger touch protection combined terminal block, higher safety.
4. With energy storage mechanism, the contact can be quickly closed, which overcomes the adverse effects caused by the speed of manual operation handle and improves the service life of the product.
5. A variety of accessories are available for selection, and they are modularized and elastically combined, which is very convenient for users to install.
6. The shell and some functional parts are made of high flame retardant, high temperature resistant and impact resistant plastics imported from abroad.
7. High current limiting coefficient, better performance price ratio.
Miniature circuit breakers are widely used in power systems due to their small size, convenient installation and flexible use. The miniature circuit breaker mainly has two functions: short circuit protection (electromagnetic tripping) and overload protection (bimetal thermal tripping). When the miniature circuit breaker is equipped with leakage tripping accessories, it constitutes our most common leakage protector.
1. Open circuit protection: when the line has an open circuit fault and the short circuit current is very large, the electromagnetic force of the electromagnetic coil can be used to drive the chip in the coil to push the push rod, and the push rod can open the lock catch, so that the time to realize the breaking function does not exceed 0.1 seconds
2. Overload protection: When the line has an overload fault, and the current exceeds the rated current and is less than the set short-circuit current value, the overload current will bend the hot metal element and push the latch, thus realizing the function of breaking the circuit breaker. The time will have a corresponding delay according to the size of the current
