Low electric arc alternating current contactor

Abstract

The invention is a low-electric arc AC trigger, comprising electromagnetic contactor, and its character lies in also comprising pulse power supply forming circuit and low-electric arc forming circuit as well as multifunctional failure detecting circuit, and it uses powerful pulse magnetic energy converted by instantaneous heavy current as the power to drive the contact of the contactor to act so as to switch on / off the load of the power supply, where the acting course each time is monitored by electronic circuit and the switching-on / off program is performed in the lowest voltage position of AC voltage, thus reducing the destructive power of electric arc and simultaneously the contactor itself adopts photoelectric coupling circuit so as to be monitored by external low-voltage signal instruction. And the invention is a device with overload protection, underphase protection, short-circuiting protection, earth leakage protection and other power safety protecting functions.

Description

technical field [0001] The present invention relates to an AC contactor, specifically, when the AC power supply is at the lowest voltage position, the instantaneous large current is converted into a powerful magnetic field energy to push the mechanical contact of the contactor to move, and to control the load path of the AC power supply It can be turned on or off, and it also has an AC contactor that accepts external low-voltage signal command control and has circuit safety protection functions such as overload, phase loss, short circuit, and leakage. Background technique [0002] As we all know, the commercially available traditional contactor uses AC or DC to generate a magnetic field through the contactor coil to control the action of the mechanical contact in the contactor, so that the power load circuit is turned on or off. According to the requirements of the on-off program of the load circuit, when the mechanical contact points need to be in the conduction state for a...

AI Technical Summary

Problems solved by technology

[0003] To sum up, how to overcome the unsafe accidents of electromagnetic control protection triggering contact on-off state, large power consumption, and strong arc easily generated by state transition in traditional contactors, as well as single purpose and inability to directly accept external low-voltage and low-current signal commands The defect is the technical problem to be solved by the present invention. For this reason, the purpose of the present invention is to provide a low-arc AC contactor that can directly accept external low-voltage and small-current signal commands. Another purpose of the present invention is to provide a A contactor that uses a pulsed magnetic field to control the on-off state of the contact point. Another object of the present invention is to provide a multifunctional contactor that can detect various circuit faults

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