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A high-safety DC grounding test device

A technology of DC grounding and test equipment, which is applied in the direction of measuring equipment, short-circuit testing, and testing dielectric strength, etc., can solve the problems of uncorrectable misoperation and low safety, so as to ensure the safety of equipment and personnel, ensure safety, and avoid excessive The effect of flow or short circuit

Active Publication Date: 2021-11-23
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JIAXING POWER SUPPLY CO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly solves the problems that the original technology is not high in safety; it is impossible to correct misoperation during manual operation; it provides a high-safety DC grounding test device, which can respond quickly when it is judged that the circuit is over-current or short-circuited; In the event of manual operation misoperation, it can remind the staff and automatically return to a safe position to improve safety

Method used

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  • A high-safety DC grounding test device
  • A high-safety DC grounding test device

Examples

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Embodiment

[0024] A high-safety DC grounding test device of this embodiment, such as figure 1 As shown, it includes a balance bridge, and the balance bridge is a bridge circuit with double bridge arms, and the bridge arm is a DC grounding analog resistance part; the DC grounding simulation resistance part includes a switch connected to a single pole three throw, an overpass Current protection relay, fuse, coarse resistor, fine resistor and ammeter, ohmmeter and voltmeter in parallel.

[0025] Between the positive bus CM+ and the ground DD, a first bridge arm is arranged. The positive bus CM+ is connected to the right end contact of the single-pole three-throw switch S1 in the figure, and the right end contact of the switch S1 is connected to one end of the first voltmeter. The other end of a voltmeter is connected to the ground DD, the middle contact of the switch S1 is connected to one end of the first ohmmeter, the other end of the first ohmmeter is connected to the ground DD, and the ...

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Abstract

The invention discloses a high-safety DC grounding test device. In order to overcome the low security of the prior art and the inability to correct manual misoperations, the present invention adopts a balanced bridge, including two identical bridge arms connected between the bus bar and the ground, and the bridge arms include sequentially connected A switch capable of controlled automatic reset, a protection device, an adjustable resistance and a meter for measuring; said measuring meter and switch are connected to the controller. The device can respond quickly when it is judged that the circuit is over-current or short-circuited; when manual operation is misoperated, it can remind the staff and automatically return to a safe position to improve safety.

Description

technical field [0001] The invention relates to a direct current grounding test device, in particular to a high-safety direct current grounding test device. Background technique [0002] The DC power supply system is a low-voltage DC uninterrupted power supply system in the power system substation that provides power for various control equipment in the station, such as circuit breakers, relay protection devices, automatic devices, and other primary and secondary equipment; when the DC system is grounded, It will seriously affect the safe operation of the control equipment, and may cause misoperation of the control equipment, etc., which need to be discovered and eliminated in time; in order to detect the ground insulation of the DC system, the substation is equipped with a DC insulation detection device. [0003] In order to ensure the safety of the DC insulation detection device during use, the general device uses a fuse or a relay as a protective safety device, but the fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/52G01R31/12
CPCG01R31/1272
Inventor 傅进高惠新周刚陈亦平茆超吴立文费丽强费平平张嘉文王聃许路广周迅金建炜朱烨
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JIAXING POWER SUPPLY CO
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