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High-precision no-load current testing device for electromagnetic voltage transformer

A technology of voltage transformer and no-load current, applied in measuring devices, measuring current/voltage, instruments, etc., can solve the problems of low test accuracy, easy to burn ammeter, poor test safety, etc., to improve work efficiency, not easy Error, simple wiring effect

Pending Publication Date: 2019-01-01
XINING POWER SUPPLY CO OF STATE GRID QINGHAI ELECTRIC POWER CO +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the conventional PT no-load current test has complex wiring, poor test safety, low test accuracy, and easy to burn out the ammeter. Therefore, it is urgent to develop a high-precision electromagnetic voltage transformer no-load current test device.

Method used

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  • High-precision no-load current testing device for electromagnetic voltage transformer
  • High-precision no-load current testing device for electromagnetic voltage transformer
  • High-precision no-load current testing device for electromagnetic voltage transformer

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Embodiment 1

[0019] Embodiment 1: A high-precision electromagnetic voltage transformer no-load current test device, the structure of which is: a voltage adjustment knob (10) is arranged on the upper surface of the main body (16) of the tester, and the left side of the voltage adjustment knob (10) is A power switch K1 (1) and a power jack (13) are provided, an ammeter A1 (6), an ammeter A2 (8) and a voltmeter (9) are arranged on the right side of the voltage adjustment knob (10), and the voltage adjustment knob (10 ) is provided with contactor conduction blocking switch K2 (11) and switch K3 (3), above the voltage adjustment knob (10) is provided with display lamp L1 (12) and display lamp L3 (7), ammeter A1 (6 ) is equipped with an emergency switch (17) and a fuse (18), and the upper surface of the tester main body (16) is also provided with a ground wire jack (14) and a measuring pen connection hole (15); the contact in the circuit The contactor (2) is connected to the positive pole of the...

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Abstract

The invention relates to a high-precision no-load current testing device for an electromagnetic voltage transformer, and specifically relates to the technical field of no-load current testing for thevoltage transformer. The high-precision no-load current testing device structurally comprises the main components such as a power switch K1 (1), an ammeter A1 (6), an ammeter A2 (8), a voltmeter (9),a voltage regulating knob (10), a power jack (13), a grounding wire jack (14) and measurement pen connecting holes (15). The beneficial effects lie in that the high-precision no-load current testing device only needs to connect an output terminal to a secondary terminal of the electromagnetic voltage transformer (PT), the wiring is simple, and the working efficiency is greatly improved; the high-precision no-load current testing device adopts the 0.2-level ammeters, thereby improving the no-load current testing precision; the no-load current variable sampling frequency adopted by the high-precision no-load current testing device is high, thereby being capable of discovering the variation of the no-load current timely, and preventing the misjudgment of the PT core quality and turn-to-turn short circuit defects; and the high-precision no-load current testing device fully considers multiple dangerous points in the testing process and formulates protection measures correspondingly.

Description

technical field [0001] The invention relates to the technical field of voltage transformer no-load current testing, in particular to a high-precision electromagnetic voltage transformer no-load current testing device. Background technique [0002] Electromagnetic voltage transformer (PT) is an important power equipment in the substation to monitor whether the voltage of incoming lines, busbars, and outgoing lines is abnormal and to measure electric energy. The abnormality of PT will directly affect the stable supply of electric energy. The no-load current test of PT will become particularly important. At present, the conventional PT no-load current test has complex wiring, poor test safety, low test accuracy, and easy to burn out the ammeter. Therefore, it is urgent to develop a high-precision electromagnetic voltage transformer no-load current test device. Contents of the invention [0003] Aiming at the problems existing in the above-mentioned technologies, the present ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
CPCG01R19/00
Inventor 王凯马宇驰付江李超陈禄姜伟滔刘志刚彭兴海
Owner XINING POWER SUPPLY CO OF STATE GRID QINGHAI ELECTRIC POWER CO
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