Circuit for eliminating induced electricity of alternating-current control loop and implementation method thereof

Abstract

The invention discloses a circuit for eliminating induced electricity of an alternating-current control loop and an implementation method thereof, and mainly solves the problem that alternating-current control of an existing coal belt conveyor is easily affected by induced voltage generated by a cable core wire capacitor, so that the belt conveyor is stopped by mistake. The method comprises the following steps that (1) a belt motor protection device detects the voltage between a belt local control cabinet and a belt motor protection device connecting cable in real time, and whether the voltageis leakage voltage or induction voltage is judged; (2) if the voltage is the leakage voltage, the belt motor protection device controls to cut off the power supply; and (S3) the belt local control cabinet sends out a switching-on allowing signal to enable a remote / local change-over switch to be switched on, and a relay is connected between the belt local control cabinet and the belt motor protection device to eliminate the induced voltage. Induced electricity is eliminated in an alternating-current control loop in a mode of being connected with the intermediate relay in parallel, and the accident that a motor is started and stopped by mistake due to the existence of the induced electricity is avoided.

Description

technical field [0001] The invention relates to the technical field of safety transformation of belt conveyor equipment, in particular to a circuit for eliminating induced electricity in an AC control loop and a realization method thereof. Background technique [0002] The coal conveyor belt is the most widely used and most involved part in the production and power generation process of the power plant. Its quality is directly related to the continuity, stability, efficiency and output power of the power plant. Once the coal conveyor belt fails, It will directly lead to the paralysis of the coal supply system, and then lead to the supply of electricity, causing adverse effects. The normal supply of electric energy is directly related to the normal operation of people's production and life and society. Once a power supply failure occurs, it will directly lead to a large-scale power outage, which will seriously affect social development and people's production and life, and e...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a circuit and its implementation method for eliminating the induced electricity of the AC control loop, mainly to solve the problem that the AC control of the existing coal conveyor belt conveyor is easily affected by the induced voltage generated by the capacitance of the cable core wire, causing the belt conveyor to stop by mistake question

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