plastic case circuit breaker mainly provides protection function for overload and short circuit in low voltage distribution system and motor protection circuit. because of its reliability and stability,

plastic case circuit breaker has become a widely used product in industry. miniature circuit breaker is also a circuit breaker product with great use range and quantity. its main function is to provide protection for distribution devices of building electrical terminals. both of them belong to circuit breakers. many people are not clear about how to choose relays. here is a brief introduction of the differences between them. the current level of

p from p from electrical parameter
plastic shell circuit breaker can reach 2000a, while the maximum current of miniature circuit breaker is generally within 63a. because of the difference in current level between the two, the effective area of their work is also different. the effective area of plastic case circuit breaker is much larger than that of miniature circuit breaker, and the accessible conductor of plastic case circuit breaker is much larger than that of miniature circuit breaker. the accessible conductor of plastic case circuit breaker can reach 35 square meters, while the miniature circuit breaker is only suitable for using conductors under 10 square meters. the installation mode of
plastic case circuit breaker is mainly screw, which has good contact and stable operation. the micro-circuit breaker is mainly installed through the guide rail, which will lead to poor contact due to insufficient torque, so the installation of the plastic case circuit breaker is more stable and less difficult than the micro-circuit breaker.p from p from using environment
plastic shell circuit breaker can work normally in the environment below 2,000 meters above sea level, and can resist the influence of harsh environment, such as air humidity, salt fog, oil mist, etc., ordinary plastic shell circuit breaker can work normally under earthquake conditions, and marine circuit breaker can vibrate on ship plate. it can work normally at any time.
{span 0} can also refer to the following points when choosing circuit breakers:  
1, circuit without starting current can be compared with micro-circuit breaker
2, when the actual current is close to the rated current, the circuit breaker with high rated current can be selected.
3, plastic case circuit breaker can not protect motor, overload protection, plastic case circuit breaker can. the motor under
4 and 10kv can be protected by miniature circuit breaker, and the best choice for protection above 10kv is plastic case circuit breaker.
5, high-power motor is best to choose plastic case circuit breaker.
6 and plastic case circuit breaker adopt two sets of devices to protect over-current and short-circuit. the over-current protection value can be adjusted manually. the over-current and short-circuit protection device of miniature circuit breaker uses one set of devices, and the current can not be adjusted.
7, plastic case circuit breaker has large internal component spacing, built-in arc extinguishing cover, strong arc extinguishing ability, can withstand larger short circuit current, and is not easy to cause inter-phase short circuit, long service life. the operation sensitivity of
8 and plastic case circuit breaker is higher than that of plastic case circuit breaker.
 
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