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What is the scope of use of AC contactors?
- Know the principle, you should figure out the connection of the external power supply, that is, the coil of the two contactss
How to get the relay time parameter
- Therefore, when the contact circuit is connected to the AC circuit, the contact instantaneous value between the contacts to determine the size of the contact closed and off the state, the error will be great, so no accurate value.s
What causes the AC contactor to be damaged
- Damage to the product itself (such as the coil broken or burned, the mechanical moving part was stuck, the shaft rust or skew, etc.) 5. Contact spring pressure and overtravel. Increase the supply voltages
Determine whether the AC contactor can cut off the short circuit current?
- arc extinguishing device, the general capacity of the larger AC contactor are equipped with arc extinguishing device, in order to quickly cut off the arc, from burning the main contact;s
The main classification of contactors
- According to the operating mechanism is divided into: electromagnetic contactor, permanent magnet contactor.s
What are the principles of selection of contactors?
- Select the rated voltage of the main contact of the contactor The rated voltage of the main contact of the contactor shall be greater than or equal to the rated voltage of the control circuit.s
By the drive system, contact systems, arc and other components of the connector.
- arc extinguishing system: arc extinguishing device used to ensure that the contact disconnect the circuits
What is the role of the contactor
- Contactor control capacity, suitable for frequent operation and remote control, automatic control system is one of the important components.s
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