Wiring device for voltage transformer verification

A technology of voltage transformers and wiring devices, which is applied in the field of voltage transformer verification, can solve problems such as long operation time with high voltage, low verification work efficiency, and inability to guarantee accuracy, so as to improve verification work efficiency, improve enterprise safety benefits, The effect of reducing charging time

Inactive Publication Date: 2017-03-08
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When used for metering and instrumentation devices, in order to measure or measure accurately, it is necessary to regularly perform metering verification on voltage transformers, otherwise the accuracy cannot be guaranteed, resulting in protection malfunctions, metering errors, etc.
During the verification process, it is necessary to connect the AC power supply, the voltage regulator, the booster and the standard voltage transformer in sequence, and the standard voltage transformer is then connected to the tested voltage transformer. In the process, only one tested voltage transformer can be verified, and there are usually two to three transformers in each group on site. It is necessary to assemble and disassemble the high-voltage test line for many times, and to carry out the process of increasing the voltage multiple times. It requires the cooperation of multiple verification staff. Long operating time with high pressure, high safety risk, low efficiency of verification work

Method used

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  • Wiring device for voltage transformer verification
  • Wiring device for voltage transformer verification

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0014] The wiring device for voltage transformer verification includes a low-voltage power distribution box, four single-chip switches, a monitoring voltmeter 13, terminals and wires, the single-chip switch is installed in the low-voltage power distribution box, the first input terminal 7 and the second The second single-chip switch 2 is connected in series between an output connection terminal 10, the fourth single-chip switch 4 is connected in series between the second input connection terminal 8 and the first output connection terminal 10, and the first input connection terminal 7 and the second output connection terminal The first single-chip switch 1 is connected in series between 11, the third single-chip switch 3 is connected in series between the second input terminal 8 and the second output terminal 11, and the second output terminal 11 and the third output terminal 12 are connected in series Monitor voltmeter 13.

[0015] When verifying the two voltage transformers, ...

specific Embodiment approach 2

[0017] As an improvement of the first specific embodiment, a wiring device for voltage transformer verification is characterized in that it also includes a sixth single-chip switch 6 connected in series between the third input terminal 9 and the first output terminal 10, the first The fifth single-chip switch 5 is connected in series between three input terminals 9 and the second output terminal 11, and the third input terminal 9 is connected to the secondary winding terminal of the voltage transformer three to be verified, and the voltage transformer three to be verified The secondary coil a 3 end is connected with the a end of the transformer calibrator 19, and the secondary coil x of the potential transformer three to be tested 3 The terminal is connected to the third input connection terminal 9 of the connection device. The remaining connection modes are the same as those in the first embodiment.

[0018] When verifying the voltage transformer to be tested, first close t...

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PUM

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Abstract

The invention discloses a wiring device for detecting a voltage transformer. The wiring device is characterized by comprising a low-voltage distribution box, monolithic switches, a monitoring voltmeter, wiring terminals and wires, wherein the monolithic switches are arranged in the low-voltage distribution box; three input wiring terminals of the wiring device are connected with test terminals of the detected transformer, and output wiring terminals of the wiring device are connected with sampling terminals of a transformer calibrator; two of the output wiring terminals are connected to the monitoring voltmeter, and are used for protecting the transformer calibrator from being damaged by impulse voltage when loops are switched. During the use, the monolithic switches are operated to be switched on and off to switch three different measurement loops. According to the wiring device, a plurality of transformers can be detected only by one-time boosting process, so that the detection working efficiency is greatly improved, the personnel allocation is reduced, the frequency of assembly and disassembly of high-voltage test wires is reduced, the electrification time in a high-voltage test is shortened, the safety risks in a testing process are reduced, and the safety benefits of an enterprise are improved.

Description

technical field [0001] The invention relates to the technical field of voltage transformer verification. Background technique [0002] The function of the voltage transformer is to transform the high voltage into a standard secondary voltage of 100V or lower in proportion to the use of protection, metering, and instrumentation devices. At the same time, the high voltage can be isolated from the electrical workers by using the voltage transformer. The safety of personnel is guaranteed. Due to the above functions, voltage transformers are widely used in the fields of power generation, transmission and distribution. When used for metering and instrumentation devices, in order to measure or measure accurately, it is necessary to regularly perform metering verification on voltage transformers, otherwise the accuracy cannot be guaranteed, resulting in protection malfunctions and metering errors. During the verification process, it is necessary to connect the AC power supply, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R1/04
Inventor 马永刚王闵飞宋杏然
Owner STATE GRID CORP OF CHINA
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