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A Transformer Winding DC Resistance Test System

A technology for DC resistance testing and transformer windings. It is applied in the direction of measuring resistance/reactance/impedance, instruments, and measuring devices. It can solve problems such as terminal short-circuit and arcing, instrument overload damage, and personnel electric shock, etc., to improve conversion speed and reduce Maintenance costs and the effect of reducing the probability of accidental electric shock

Active Publication Date: 2018-02-23
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of switching wiring, there are certain risk factors, such as: miswiring, short circuit and arcing between terminals, overload damage to the instrument, etc., which may even cause electric shock

Method used

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  • A Transformer Winding DC Resistance Test System
  • A Transformer Winding DC Resistance Test System
  • A Transformer Winding DC Resistance Test System

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0045] See attached Figure 1-9 , the present embodiment includes a direct resistance measuring instrument; it is characterized in that it also includes a CPU, a first control signal circuit, a first contactor circuit, a wiring switching circuit, and a remote control device for automatically adjusting the tap position of the load switch; the automatic adjustment The remote control device for the tap position of the on-load switch is composed of a DC reducer control circuit, a remote control device for the on-load tap-changer, a video monitoring component, and a video monitoring component display terminal;

[0046] One output terminal of the CPU is connected to the first contactor circuit through the first control signal circuit; the output terminal of the first contactor circuit is connected to the control terminal of the wiring switching circu...

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PUM

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Abstract

The invention relates to a transformer winding DC resistance test system, which includes a DC resistance measuring instrument, a CPU, a first control signal circuit, a first contactor circuit, a wiring switching circuit, and a remote control device for automatically adjusting the tap position of an on-load switch; The remote control device for automatically adjusting the tap position of the on-load switch is composed of a DC reducer control circuit, a remote control device for the on-load tap changer, a video monitoring component, and a display terminal of the video monitoring component; the invention effectively improves the test efficiency and effectively reduces The risk factors existing in the process of manual switching test wiring are eliminated.

Description

technical field [0001] The invention relates to an automatic gear-shifting and phase-changing type transformer winding DC resistance testing device, which is suitable for testing the DC resistance of the transformer winding. Background technique [0002] According to statistics, in the DC resistance test of transformers, the effective test time accounts for about 40% of the total operation time, and the remaining time is occupied by adjusting the tap position of the transformer, echoing each other between personnel, and rework caused by improper echoing. lower. In addition, when conducting the DC resistance test of the transformer, it is necessary to frequently operate the on-load tap-changer for tap change; and in the field of infrastructure construction, overhaul and technical renovation, etc., when performing transformer tests, it often happens that the power supply of the on-load mechanism box is not installed in place, Conditions where electric operation is not possibl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/02
Inventor 吴灏林长海王玮民霍晓良杜洁黄普利王泽霖孙红燕
Owner STATE GRID CORP OF CHINA