Dry-type transformer on-load tap-changer tester and method thereof
A dry-type transformer and switch tester technology, applied in circuit breaker testing and other directions, can solve the problems of low test efficiency and inconvenience in carrying, and achieve the effect of intuitive test function, convenient carrying and improving transmission efficiency.
Active Publication Date: 2014-12-24
GUANGZHOU DEPOSON ELECTRIC TECH
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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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[0035] like figure 1 As shown, the dry-type transformer on-load tap-changer can be divided into three groups of the same mechanical switches, that is, 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 the vacuum bubble (MSV), the secondary vacuum bubble (TTV), and the switch (SelA and SelB). The switch is a single-pole double-throw switch, which needs to be regarded as two single-pole single-throw switches (SelA and SelB) during testing. When the dry-type transformer on-load tap-changer performs transition actions, each switch will perform opening and closing actions at different time points, and the tester converts the opening and closing actions of the switches into level changes, and then further converts them into digital values. The change between 1 and 0 is for the test software on the PC to process.
[0036] figure 2 and image 3 It is t...
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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 for the transition time parameter of an on-load tap changer of a dry-type transformer and a method thereof. Background technique [0002] When the dry-type transformer on-load tap-changer is working, it must ensure that the current will not be interrupted, so as not to cause power failure of important electrical equipment. However, unqualified production and assembly of the on-load tap-changer, loose mechanical parts of the switch after long-term use, etc. often lead to abnormal operation of the switch and accidents. In order to prevent accidents, before the on-load tap-changer leaves the factory and during power-off maintenance, it is necessary to measure the switch transition time parameters, but the time interval for the switch to perform transition actions is only more than 100 milliseconds, and it is difficult to detect abnormal conditions without th...
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IPC IPC(8): G01R31/327
Inventor林坚湖钟建华张文英
OwnerGUANGZHOU DEPOSON ELECTRIC TECH