Structure and operation of circuit breakers

A circuit breaker is mainly composed of three basic parts, namely contacts, arc extinguishing system, and various release devices, including overcurrent release device, undervoltag...

Key points of miniature circuit breaker design

1) The coordination between circuit breakers should consider the instantaneous tripping action value of the higher-level circuit breaker, which should be greater than the maximum e...

Main technical parameters and types of contactors

(1) Rated voltage: The rated voltage of a contactor refers to the rated voltage of the main contact. There are 220V, 380V, and 660V for communication, with a rated voltage of up to...

Development Trend of Motor Protectors

（1） Every year, about 100 million kilograms of electromagnetic wire are wasted due to the maintenance of electric motors nationwide. If 100 million kilograms of electromagnetic w...

The selection of low-voltage circuit breakers should be considered from the following aspects

(1) The selection of circuit breaker type should be based on the usage scenario and protection requirements. Choose plastic shell type as usual; When the short-circuit current is h...

What is a circuit breaker

Low voltage circuit breakers, commonly known as automatic switches or air switches, are used for infrequent on-off control in low-voltage distribution circuits. It is a control and...

Application fields of motor starters

Water pump: By utilizing the pump control function, the phenomenon of water hammer caused by liquid flow impact is reduced during starting and stopping, saving system maintenance c...

How to choose a contactor

(1) Select the type of contactor based on the nature of the load.(2) The rated voltage should be greater than or equal to the operating voltage of the main circuit.(3) The rated cu...

Working principle of miniature circuit breaker

A miniature circuit breaker consists of an operating mechanism, contacts, protective devices (various release devices), arc extinguishing system, etc. Its main contact is manually ...

What is a contactor

Contactors are mainly used to control motors, electric heating equipment, welding machines, capacitor banks, etc. They can frequently connect or disconnect AC/DC main circuits, ach...

Construction and installation of miniature circuit breakers

1) The installation of circuit breakers should comply with the requirements of GB13955-92 standard and product manual.2) The installation of circuit breakers should fully consider ...