On-line testing device for insulation resistance

An insulation resistance and online testing technology, which is applied to measuring devices, high resistance measurement, and resistance/reactance/impedance measurement. It can solve the problems of reduced accuracy of insulation resistance value, complicated detection process, and inaccurate resistance value, etc., to achieve The effect of accurate detection values

Active Publication Date: 2019-12-10
天恩璐(大连)节能服务有限公司 +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the detection of insulation resistance generally involves stopping the equipment and applying a DC voltage on the power line for measurement. This method of insulation resistance detection not only affects the normal operation of the equipment, but also the detection process is complicated, and because the obtained insulation resistance value is not Obtained in the running state of the equipment, the obtained resistance value is inaccurate (the insulation resistance is related to factors such as temperature and humidity), and at the same time, because the insulation resistance will be polarized under the action of AC voltage, the resistance value will also change, so the DC The accuracy of the insulation resistance value measured by the voltage is reduced

Method used

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  • On-line testing device for insulation resistance
  • On-line testing device for insulation resistance
  • On-line testing device for insulation resistance

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Embodiment Construction

[0032] Such as figure 1 Shown is the online testing device for insulation resistance disclosed by the present invention, including a signal source 100 for applying an AC voltage signal to a power line 105; The first current detection unit 101; used to obtain the current signal detected by the first current detection unit 101 and the voltage signal of the signal source 100, and calculate the signal of the insulation resistance value of the power line according to the obtained current signal and voltage signal a processing unit 102; a display unit 103 for displaying the insulation resistance value of the power line.

[0033] Specifically, the output frequency of the signal source is 20-150KHz, and the effective value of the output voltage is 1-10V. In this embodiment, the output frequency of the signal source 100 is 64KHz, and the effective value of the output voltage is 10V. The frequency of the signal source is much higher than the frequency of the power frequency voltage (50...

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Abstract

The invention discloses an on-line testing device for insulation resistance, and the device comprises a signal source which is used for applying an AC voltage signal to a power line; a first current detection unit which is used for detecting a current signal generated by the voltage applied by the signal source in the power line; a signal processing unit which is used for acquiring the current signal detected by the first current detection unit and the voltage signal of the signal source, and calculating the insulation resistance value of the power line according to the acquired current signaland voltage signal; and a display unit which is used for displaying the insulation resistance value of the power line. The device can detect the insulation resistance value of the power line on linein real time, is convenient to operate, is high in detection precision, and guarantees the normal operation of equipment.

Description

technical field [0001] The invention relates to the technical field of electric equipment insulation detection, in particular to an on-line testing device for insulation resistance. Background technique [0002] The power line is widely used in power engineering. It is made of one or more mutually insulated conductors and an outer insulating protective layer, and is used to transmit power or information from one place to another. The insulation performance of the power line has a great influence on the electrical performance of the power line. The lower the insulation performance, the worse the electrical performance, and the higher the insulation performance, the better the electrical performance. [0003] During the actual operation of the transformer, power line and motor, the insulation resistance will be affected by the passage of time and the temperature rise during operation. Therefore, in order to ensure the safe operation of the equipment, it is very necessary to ob...

Claims

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Application Information

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IPC IPC(8): G01R27/02G01R27/14
CPCG01R27/025G01R27/14
Inventor 刘明日
Owner 天恩璐(大连)节能服务有限公司
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