A low-voltage trailing cable insulation on-line monitoring device

Abstract

The application discloses a kind of low-voltage towed cable insulation on-line monitoring device, and towed cable is respectively connected with the low-voltage output end of three-phase transformer and equipment, comprising: signal generation module, neutral point module, current detection module and controller, wherein, the first output end of signal generation module is electrically connected with the neutral point end of neutral point module, and the second output end of signal generation module is electrically connected with ground end by grounding resistance;The output end of neutral point module is electrically connected with the first end of towed cable;Current detection module is connected with first cable, and the output end of current detection module is electrically connected with the input end of controller, wherein, the first cable is the cable connected between the first output end of signal generation module and the neutral point end of neutral point module.This application generates signal and existing signal frequency isolation in cable, there is no interference signal, measurement signal value is relatively larger, easy to measure, and acquisition value is more accurate, so it can accurately detect the insulation condition of towed cable.

Images