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Centralized control cabinet for transformer sleeve test and use method thereof

A technology for transformer bushings and centralized control boxes, applied in the direction of testing dielectric strength, etc., can solve problems such as high labor intensity, reduce quantity and labor intensity, eliminate violations, and ensure personal safety

Inactive Publication Date: 2012-06-27
DANDONG ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems in the above-mentioned prior art, the present invention provides a transformer bushing test centralized control box, which solves the problems of high labor intensity and potential safety hazards in the prior art

Method used

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  • Centralized control cabinet for transformer sleeve test and use method thereof
  • Centralized control cabinet for transformer sleeve test and use method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The panel is made of 0.8cm thick insulating board, and the panel is pasted with insulating paper; the jack 1 is set on the panel, and the jack 1 is connected with the moving contact of the single-phase isolating switch 2 through internal wiring. The signal line jacks on the bridge are consistent; the static contacts of the single-phase isolating switch 2 are connected to each other and grounded through the grounding terminal. The single-phase isolating switch is connected with an operating handle, and the operating handle is processed by an insulating plate, and its insulation strength is sufficient to withstand the voltage during the insulation resistance test, thereby ensuring the personal safety of the staff.

[0036] Using method of the present invention comprises the following steps:

[0037] Taking the test of 220kV transformer as an example, the bushing insulation resistance test is carried out. The bushing insulation resistance test is actually to measure the in...

Embodiment 2

[0040] The structure of the centralized control box of this embodiment is the same as that of Embodiment 1; the casing dielectric loss test method comprises the following steps:

[0041] Before the test, close all the isolating switches and ground them through the grounding terminals on the panel; lead all the test lines from the end screens of the transformer bushings to the bottom according to the phases, and insert them into the signal line jacks. When carrying out the dielectric loss test of the bushing, in order to avoid the phenomenon of discharge due to the ungrounded end screen of the bushing, first connect all the test lines to the signal line jack; then connect the test line of the bushing to be measured from the plug Pull it out from the dielectric loss bridge and insert it into the dielectric loss bridge. The non-test can ensure reliable grounding; after the test is over and the test power is disconnected, pull out the test line from the dielectric loss bridge and i...

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Abstract

The invention relates to a centralized control cabinet for a transformer sleeve test and a use method thereof, is suitable for electric power system high voltage tests, and belongs to the field of electrical power application. The centralized control cabinet adopts the structure that insertion holes are connected with movable contacts of isolating switches through interior wirings, and fixed contacts of the isolating switches are mutually connected and grounded through a grounded terminal. According to the invention, a tester does not need to stand on a transformer waiting for wiring change, thereby preventing the tester from violating the rules, and guaranteeing the personnel safety of the tester to the utmost extent; meanwhile, the operation time is greatly shortened, and the amount and labor intensity of the testers are reduced as the wiring changing method and the testing condition are changed.

Description

technical field [0001] The invention relates to a centralized control box, in particular to a transformer bushing test centralized control box and a method for using the same, which is suitable for the field of high-voltage testing of electric power systems and belongs to the field of electric power applications. Background technique [0002] Transformer is the most important electrical equipment in the power system. The safe operation of high-voltage and large-capacity transformers is particularly important. The quality of its insulation performance will directly affect the normal operation of the power system. In order to find some hidden defects, regular preventive tests should be carried out on transformers, which are currently changed to state-of-the-art maintenance. The dielectric loss test of the transformer body and bushing, hereinafter referred to as the dielectric loss test, is an indispensable test item no matter in the transformer transfer or pre-test. During th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 周彬李林王迪
Owner DANDONG ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY
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