Contactors are divided into AC contactors (voltage AC) and DC contactors (voltage DC), which are used in power, distribution and electricity occasions.In a broad sense, contactor refers to industrial electrical appliances that use coil current to generate a magnetic field and close the contacts to control the load.
In electroscience, because can quickly cut off ac and DC main loop and can frequently turn on and high current control (up to 800A) circuit, so often used in the motor as a control object can also be used as the control plant equipment heater generator and various power load, contactor can not only turn on and cut off the circuit, but also have low voltage release protection effect.Conactor control capacity is large, suitable for frequent operation and remote control, is one of the important components in automatic control system.
In industrial electricity, there are many models of contactors, and the working current varies in 5A-1000A, and its use is quite widespread.
Contractor principle works
The working principle of the contactor is: when the contactor coil is energized, the coil current will produce magnetic field, the magnetic field makes the static core produce electromagnetic suction to attract the core, and drive the AC contactor point action, often close the contact disconnected, often open the contact closed, the two are linkage.When the coil is powered off, the electromagnetic suction disappears, and the armature is released under the action of the release spring, making the contact recover, the often open contact is disconnected, and the often closed contact is closed.DC contacts work in a somewhat similar way to a temperature switch.AC contactor wiring method
Post time: Apr-11-2022
