AC contactor monitoring device and AC contactor online monitoring system

Abstract

The invention discloses an AC contactor monitoring device and an AC contactor online monitoring system. The device comprises a power module, a bounce amplification module, a sensor module and a microprocessor. The power module is connected with the sensor module and the microprocessor so as to achieve the power supply. The bounce amplification module is provided with a first end which is used forconnecting a moving contact of an AC contactor, and a second end connected to the sensor module. The bounce amplification module is used for conduction amplification of the vibration amplitude of themoving contact. The sensor module is used for detecting the vibration amplitude and vibration frequency of the bounce amplification module, and transmits the detected vibration amplitude and vibrationfrequency information to the microprocessor for processing. The device achieves the visual reflection and monitoring of the internal abnormal conditions of the AC contactor, and facilitates the centralized monitoring and fault analysis.

Description

technical field [0001] The invention relates to the technical field of AC contactors, in particular to an AC contactor monitoring device and an AC contactor online monitoring system. Background technique [0002] AC contactors are mainly used for repeated operations and controls that are not limited by position. It is an important part of the automatic control system. Its most important structure is the iron core and the contact, because the contact is the main executive part of the electrical appliance and has the function of closing and breaking the circuit. In a switchgear with contacts, the most important thing is the contacts. [0003] The dynamic and static contacts of the AC contactor will collide and bounce during the closing process. Because the bounce amplitude of the contact is too large, even exceeding its deformation range, the dynamic and static contacts of the AC contactor are easy to separate and arc. The high temperature of the arc can melt and splash th...

AI Technical Summary

Problems solved by technology

[0004] The existing AC contactor monitoring device is used to collect, summarize and display the current and voltage between the moving contact and the static contact to achieve the purpose of monitoring the working voltage and current of the moving and static contacts. By judging the working voltage and current values Judging the performance of the AC contactor, the installation of the system is troublesome, the numerical display method is not intuitive, it is difficult to analyze the problem of contact damage, and it is difficult to apply on a large scale, and it is impossible to realize the centralized monitoring of multiple AC contactor monitoring device terminals in the area. Very limited effect

Images