Dry-type transformer on-load tap-changer tester and method thereof

A technology of dry-type transformer and switch tester, which is applied in the direction of circuit breaker testing, etc., can solve the problems of inconvenient portability and low test efficiency, and achieve the effect of convenient portability, intuitive test function and high test efficiency

Active Publication Date: 2017-05-03
GUANGZHOU DEPOSON ELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a dry-type transformer on-load tap-changer tester and its method with simple wiring, high test efficiency and convenient portability, which solves the problem of inconvenient portability and low test efficiency in the prior art, which needs to be tested by means of general test equipment such as an oscilloscope. technical problem

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  • Dry-type transformer on-load tap-changer tester and method thereof
  • Dry-type transformer on-load tap-changer tester and method thereof
  • Dry-type transformer on-load tap-changer tester and method thereof

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Embodiment Construction

[0035] Such as figure 1 As shown, the dry-type transformer on-load tap changer can be divided into three groups of the same mechanical switches, namely the first group of mechanical switches 1, the second group of mechanical switches 2 and the third group of mechanical switches 3. Each group has four mechanical switches, They are vacuum bubble (MSV), secondary vacuum bubble (TTV), and switch (SelA and SelB). The switch is a single-pole double-throw switch, which needs to be treated as two single-pole single-throw switches (SelA and SelB) during testing. When the dry-type transformer on-load tap-changer performs a transitional action, each switch will perform opening and closing actions at different points in time, and the tester converts the opening and closing actions of the switches into level changes, and then further into digital Measure the change between 1 and 0 for the test software on the PC to process.

[0036] figure 2 with image 3 It is the ideal action waveform fo...

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Abstract

The invention relates to a dry-type transformer on-load tap-changer tester and a method thereof. The dry-type transformer on-load tap-changer tester comprises a voltage source, a voltage sampling module and a controlling and processing center, and the voltage sources are connected with a dry-type transformer on-load tap-changer switch; the voltage sampling module is connected with the dry-type transformer on-load tap-changer switch and the controlling and processing center, and the voltage sampling module is controlled through the controlling and processing center; change of states of the dry-type transformer on-load tap-changer switch forms voltage sampling signals after being sampled through the voltage sampling module, the voltage sampling signals are transmitted to the controlling and processing center, and transition time parameters are calculated and displayed through the controlling and processing center. By the dry-type transformer on-load tap-changer tester and the method thereof, technical problems that general purpose test equipment of oscilloscopes and the like are needed in test in the prior art, inconvenience in carrying is caused, and testing efficiency is low are solved.

Description

Technical field [0001] The invention relates to a high-voltage electrical measuring instrument, in particular to a tester and a method for testing the transient time parameters of a dry-type transformer on-load tap changer. Background technique [0002] When the dry-type transformer on-load tap-changer is working, it must be ensured that the current will not be interrupted, so as not to cause the power outage of important electrical equipment. However, unqualified production and assembly of on-load tap-changers, loose mechanical parts of the switch during long-term use, and other reasons often cause the switch to work abnormally and cause accidents. In order to prevent accidents, the switch transition time parameters need to be measured before the on-load tap-changer leaves the factory and when the power is cut off for maintenance. However, the time interval for the switch to perform the transition action is only more than 100 milliseconds, and it is difficult to detect abnormal ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G01R31/327
Inventor林坚湖钟建华张文英
OwnerGUANGZHOU DEPOSON ELECTRIC TECH