What is the difference between capacitor switching AC contactor CJ19 and CJ39? The more detailed, the better
CJ19 series switching capacitor contactor is mainly used for AC 50Hz or 60Hz, rated voltage to 380V power line, for low-voltage reactive power compensation equipment input or resection of low-voltage shunt capacitor. The contactor has a surge suppression device, which can effectively reduce the impact of the inrush current on the capacitor and restrain the over voltage during switching.
When the contactor coil is energized, the current limiting contact head takes the 3 way current limiting resistor into the main circuit to play the role of suppressing the closing current. After a few milliseconds, the main contact is connected to the main circuit. Contactor specific limiting resistance separation mechanism of resistance is prolonged the life of glass fiber with high density and high compressive flow linear limit resistance wire tube set, increase insulation and heat dissipation performance, improve the reliability of suppression of inrush current. The series contactors also have the advantages of large contact capacity and small arc distance.
The special CJ39 switching capacitor contactor in low voltage reactive power compensation device is switched on without breaking and 50kvar shunt capacitor is applied to AC power system frequency 50Hz, rated voltage to 380V, to improve the power factor. Structure features: the series contactors are double layer contact and direct action double break point structure. It consists of three parts: electromagnetic system, contact system and surge suppression device.
