Domestic CJ15 series contactors, the maximum to achieve 4000A! No more big domestic basically! In industrial electrical, contactor models are many, current in 5A1000A, its use is quite extensive.
The contactors are ac contactors (voltage AC) and DC contactors (voltage DC), which are used in power, distribution and electricity. Contactors in a broad sense refer to industrial electrical appliances that use coil scurrent scurrent to generate a magnetic field and close the contact to control the load.
In electrotechnical, because the AC and DC main circuit and can be frequently connected with the high current control (some types of different up to 800 amperes) circuit device, so often used in the motor as a control object, can also be used as control plant equipment, electric heaters, operating mother machines and various types of power units and other electrical loads, The contactor not only turns on and cuts the circuit, but also has low voltage release protection. The contactor control capacity is large and is suitable for frequent operation and long-distance control. It is one of the important components in the automatic control system.