Method and device for adhesion detection of main contact of alternating-current contactor
A technology of AC contactor and detection device, which is applied to circuit devices, emergency protection circuit devices, parts and components of emergency protection devices, etc. personnel safety hazards and other issues, to achieve stable and reliable work, simple structure, and avoid major losses.
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[0034] Such as figure 1 , 2 As shown, the present invention discloses an AC contactor adhesion detection device, including the AC contactor main circuit and its control circuit, adhesion signal detection circuit and main controller control circuit, characterized in that: the adhesion detection circuit signal is taken from The lower end of the AC contactor, the intermediate relay of the contactor control circuit and the auxiliary contact of the AC contactor; the output signal of the adhesion detection circuit is passive output, and the type is open collector output; the control circuit of the main controller is programmable The controller PLC or microcontroller MCU is the core control circuit, which can drive the intermediate relay to realize the control of the AC contactor and the pre-stage power supply of the AC contactor.
[0035] Such as figure 2 As shown, the main circuit of the AC contactor in the present invention includes an isolating switch QS connected to the three...
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