As the professional MCCB manufacturer, SPX Electric factory would like to provide you high quality Molded case circuit breaker, which is a new type of circuit breaker made of plastic material, the main role is in the case of circuit overload and short circuit, automatically cut off the circuit, protect the circuit and electrical equipment will not be damaged because of excessive current. Due to its compact structure, convenient installation and high breaking capacity, molded case circuit breakers have been widely used in various fields such as industry, commerce and residential areas.
1. Under normal circumstances, connect and disconnect the no-load and load current in the high voltage circuit;
2. When a system failure occurs, customized Molded Case Circuit Breaker can cooperate with protective devices and automatic devices to quickly cut off the fault current, prevent the accident from expanding, and thus ensure the safe operation of the system.
These functions to ensure the safe and stable operation of electrical equipment.
(1) Selection of circuit breaker type: It should be chosen based on the application scenario and protection requirements. For example, molded case circuit breakers are generally selected; When the short-circuit current is very large, current-limiting circuit breakers should be selected. Frame-type circuit breakers should be selected when the rated current is relatively large or there is a requirement for selective protection. When controlling and protecting DC circuits containing semiconductor devices, DC circuit breakers and the like should be selected. (SPX specializes in molded case circuit breakers. If you are unsure about how to choose, you can send us an email and we will arrange for professional technicians to answer your questions.)
(2) The rated voltage and current of the circuit breaker should be greater than or equal to the normal working voltage and current of the line and equipment.
(3) The ultimate breaking capacity of the circuit breaker is greater than or equal to the maximum short-circuit current of the circuit.
(4) The rated voltage of the undervoltage trip unit is equal to the rated voltage of the line.
(5) The rated current of the overcurrent trip unit is greater than or equal to the maximum load current of the line.
SPX high quality molded case circuit breakers come in a wide range of specifications and types, from 30A to 1600A. They are of first-class quality, reasonably priced, and offer comprehensive and considerate after-sales service. We welcome friends from all walks of life at home and abroad to negotiate and cooperate!
