The contactor is divided into AC contactor (voltage AC) and DC contactor (voltage DC), which is applied to power, power distribution and power consumption.In a broad sense, the contact device refers to the use of coils in industrial electricity to generate magnetic fields to generate magnetic fields to close the contacts to achieve electrical appliances that control the load.
Contactor symbol
Divided into: electromagnetic contacts, permanent magnet contacts.The permanent magnet AC contactor is a micro -power -consuming contactor formed by using the same -sex dispersion of magnetic poles and replacing the traditional electromagnet driver with permanent magnet driver mechanism., NSFC5, NSFC12, NSFC19, CJ40J, NSFMR.
The connection between the contactor
The eight points of the three -phase contactor cooperation, three points input operation, three points for output operations, and the remaining two points to control operations.The input operation and output operation are corresponding to each other.When a self -locking operation is required, at this time, a terminal on the contactor output point must be connected to the control point of the contactor, and the connection method is a wire connection.
Contactor model
CJ20J series permanent magnet AC contact NSFC1 series permanent magnet AC contacts NSFC1-D series permanent magnet AC contactor NSFC2 series permanent magnet AC contactor NSFC3 series permanent magnet AC contacts NSFC4 series permanent magnet AC contactorNSFC5 series intersection, DC control dedicated communication contactor NSFC12 series permanent magnet AC contactor CJ40J series permanent magnet AC contact NSFMR series permanent magnet AC contactor
The role of the contactor
The contactor is a device in the starting work and protecting the line. Its role can also be faulty or loaded in the electric motor or load. After the motor current exceeds the rated current, the thermal relay contacts are generally opened at the normal closed contact, cutting off, cutting off, cutting offThe contactor circuit of the electric motor power supply to the motor, the contactor opened the road, cut off the electric motor power, protect the motor, and avoid damage.
Joint working principle of contactor
The working principle of the contactor is closely related to the current. Do not believe it: When the coil of the contactor is connected, the coil current will generate a specific magnetic field. This magnetic field allows Jing Tiexin to generate an electromagnetic absorption.This suction force can drive the iron heart and move on the contact contactor. At this time, the often closed contacts are disconnected, and the corresponding, often open contacts closed, the two are closely related.Once the coil is powered off and the electromagnetic suction power disappears, the armed iron is also released after the spring is released. At this time, it is not difficult to find that the contacts have been restored, and the contacts are often disconnected, and the contacts are closed.

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