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Electric power device insulation detection and line 'soft ground' fault tracing instrument

A technology for power equipment and fault finding, which is applied in the direction of detecting faults, testing circuits, and fault locations by conductor type, which can solve problems such as the inability to achieve fast and effective detection, and achieve the effect of compact structure, easy portability, and convenient use.

Pending Publication Date: 2018-07-31
李桂平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In practical applications, when electrical equipment is poorly insulated and causes leakage tripping, it is often caused by the "soft ground" fault of some lines. When a "soft ground" fault occurs in complex high-voltage power equipment, it cannot be quickly and effectively detected

Method used

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  • Electric power device insulation detection and line 'soft ground' fault tracing instrument
  • Electric power device insulation detection and line 'soft ground' fault tracing instrument
  • Electric power device insulation detection and line 'soft ground' fault tracing instrument

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Such as figure 2 As shown, the power equipment insulation detection and line "soft grounding" fault finding instrument includes switching power supply, charging circuit, lithium battery pack, undervoltage detection control circuit, DC / DC power conversion circuit, pulse generation and adjustment circuit, overload detection control Alarm circuit, high-voltage oscillating circuit, high-voltage transmitter circuit, high-voltage instrument circuit; the input end of the switching power supply is connected to the mains AC220V, the output end is connected to the charging circuit, and the output end of the charging circuit is connected to a lithium battery pack to charge it; the lithium battery The group supplies power to the pulse generation and regulation circuit, and the lithium battery pack also supplies power to the high-voltage instrument circuit after the voltage...

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Abstract

The present invention provides an electric power device insulation detection and line 'soft ground' fault tracing instrument. The fault tracing instrument comprises a switching power supply, a charging circuit, a lithium battery pack, an undervoltage detection control circuit, a DC / DC power switching circuit, a pulse generation and regulation circuit, an overload detection, control and alarm circuit, a high-voltage oscillating circuit, a high-voltage transmitter circuit and a high-pressure instrument circuit. A pulse high voltage capable of stepless regulation is employed to perform detectionof a leakage current at insulation weakness positions of electric power devices and circuit thereof, when high-voltage electric power devices with many machines and complex circuits have bad insulation or 'soft ground' faults, corona or pulse charge generated at the fault points of a tested device are observed to rapidly and effectively search 'soft ground' fault points of the tested device, and therefore, the electrical detection working efficiency can be greatly improved. The instrument is compact in structure and convenient to carry, can perform detection of electric power devices on sceneand is very convenient to use.

Description

technical field [0001] The invention relates to an electrical detection device, in particular to a power equipment insulation detection and circuit "soft ground" fault searcher, which belongs to the technical field of electrical inspection equipment. Background technique [0002] At present, the insulation testing instruments for power equipment and lines generally use a megohmmeter, which is mainly composed of a DC generator and a magnetoelectric system ratio meter. The magnetoelectric system ratio meter is internally composed of a permanent magnet, pole palms, two moving coils, Consists of a notched cylindrical iron core and hands. The circuit principle of megohmmeter is as follows: figure 1 As shown, when the DC generator F shakes the handle evenly at a speed of 120 rpm, the DC generator F in the meter outputs the rated voltage of the meter, and a current I1 passes between the moving coil Lv and the measured resistance Rx, and the moving coil Lv and the measured resistan...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R31/14G01R31/08G01R31/02G01R19/00
CPCG01R19/00G01R31/085G01R31/12G01R31/1227G01R31/1272G01R31/14G01R31/50
Inventor 李桂平潘朝辉石毅
Owner 李桂平
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