The working principle of the power production contact is: when the contact coil is energized, the coil current generates a magnetic field, and the generated magnetic field leads the static iron core to produce electromagnetic attraction to the iron core, and drives the AC contact action, the normally closed contact is disconnected, the normally open contact is closed, and the two are connected to each other. When the coil is de-energized, the electromagnetic attraction disappears, the armature is released under the action of the release spring, the contact is restored, the normally open contact is disconnected, and the normally closed contact. DC type contactors work somewhat similarly to temperature switches.
The power production contactor is an automatic electromagnetic electrical appliance, which is suitable for long-distance and frequent connection and disconnection of AC and DC main circuits and large-capacity control circuits. It is mainly used in automatically controlled AC and DC motors, electric heating devices, capacitor furnaces, etc. The system can not only reduce the labor intensity of the operator, so that the operator can avoid the use of high voltage, high current lines, to ensure personal safety, and the control capacity can be very large, reliable work, high operating frequency, long service life, but also has low voltage (undervoltage and loss of voltage) release protection function, so it has been widely used.
The function of the power-generating contactor is to control the large current load with small current, which can be controlled from a distance, and can be self-locking and interlocking at the same time to prevent accidents caused by misoperation. It can reduce the labor intensity of the operator, make the operator avoid high-voltage and high-current lines, and ensure personal safety; Strong control ability, reliable work, high working frequency and long service life; It has a low voltage release protection function.
The characteristics of contactors for production are:
Frequent movements, the number of opening and closing per hour can reach 150-1500 times;
Ability to energize and cut off larger currents. Generally, only the normal rated current can be interrupted, and the short circuit or fault current cannot be interrupted;
It can reach a certain control distance.
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