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Insulation monitoring device acceptance inspection auxiliary tool based on leakage current principle

An insulation monitoring device and auxiliary tool technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of relay protection device refusal to operate and malfunction, to avoid malfunction or refusal to operate, improve test methods, The effect of avoiding the risk of power failure

Pending Publication Date: 2021-11-05
STATE GRID TIANJIN ELECTRIC POWER +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the DC system that is still in operation, there is a risk that the branch grounding experiment will cause the DC circuit breaker to trip, and the two-point grounding will cause the relay protection device to refuse to operate or malfunction.

Method used

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  • Insulation monitoring device acceptance inspection auxiliary tool based on leakage current principle
  • Insulation monitoring device acceptance inspection auxiliary tool based on leakage current principle
  • Insulation monitoring device acceptance inspection auxiliary tool based on leakage current principle

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Embodiment Construction

[0015] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0016] At present, the old method of grounding test of the insulation monitoring device is to ground the DC branches to be tested one by one, and check the wiring of the DC branches and the connection of the communication lines are correct. However, in the DC system that is still in operation, there is a risk that the branch grounding experiment will cause the DC circuit breaker to t...

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Abstract

The invention provides an insulation monitoring device acceptance inspection auxiliary tool based on a leakage current principle, which relates to the technical field of insulation monitoring and comprises a lifting ring, a switch, a connecting rod, a battery jar and a U-shaped block, wherein the lifting ring is connected with the connecting rod; and the lifting ring is in contact connection with the inner side of the bottom of the U-shaped block. According to the device provided by the invention, the power loss risk of a direct current system caused by grounding short circuit of a certain direct current branch can be effectively avoided, the risk of maloperation or refusal to operation of the relay protection device can also be avoided, the operation is convenient, the existing test method is improved, and the test quality and efficiency of the device can be improved.

Description

technical field [0001] The invention relates to the technical field of insulation monitoring, in particular to an inspection auxiliary tool for insulation monitoring devices based on the principle of leakage current. Background technique [0002] The insulation monitoring device of the DC system of the substation is a device used to monitor the grounding of the DC system and select the grounding line. When any branch DC has poor insulation to the ground, it will alarm the grounding branch on the LCD screen of the monitoring device for operation and maintenance. Personnel troubleshooting. In the old method of grounding test of the insulation monitoring device, the DC branches to be tested should be grounded one by one, and the wiring of the DC branches and the connection of the communication lines should be checked for correctness. However, in the DC system that is still in operation, there is a risk that the branch grounding experiment will cause the DC circuit breaker to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/02
CPCG01R35/02
Inventor 张博涵赵世刚殷学功张昌钦谢丹王耘杨宝林张清华孙沛川杨怡
Owner STATE GRID TIANJIN ELECTRIC POWER
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