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Wiring device and current mutual inductance testing system

A technology of wiring device and current transformer, applied in the direction of measuring device, measuring electricity, measuring electrical variables, etc., can solve the problems of increasing the work intensity of on-site personnel, reducing the reliability of power supply, increasing the power failure time, etc., and reducing the number of wiring and work. The possibility of error occurrence, the effect of improving power supply reliability and reducing labor intensity

Active Publication Date: 2011-06-15
STATE GRID CORP OF CHINA +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a wiring device and a current mutual inductance test system, which can solve the inconvenient wiring, time-wasting, increased work intensity of on-site personnel, low work efficiency, increased power outage time, and reduced power supply existing in the prior art. question of reliability

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  • Wiring device and current mutual inductance testing system
  • Wiring device and current mutual inductance testing system
  • Wiring device and current mutual inductance testing system

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Embodiment Construction

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0040] figure 1 A schematic diagram of a wiring device for a current transformer test according to an embodiment of the present invention is shown, the wiring device includes:

[0041] The input unit 20 is used for electrical connection with the relay protection three-phase tester;

[0042] The output unit 30 is used for electrical connection with phase A, phase B and phase C of the current transformer;

[0043] The selection switch unit 10 is connected to the input unit and the output unit respectively, and is used to receive the test current from the relay protection three-phase tester, and selectively output the test current to phase A, phase B or phase C via the output unit Mutually.

[0044] The wiring device of this embodiment selectively outputs the current of the relay protection three-phase tester to the three phases of t...

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Abstract

The invention provides a wiring device and a current mutual inductance testing system. The wiring device comprises an input unit, an output unit and a select switch unit, wherein the input unit is electrically connected with a relay protection three-phase tester; the output unit is electrically connected with the A phase, B phase and C phase of a current mutual inductor; the select switch unit isrespectively connected to the input unit and the output unit and used for receiving test current from the relay protection three-phase tester and selectively outputting the test current to the A phase, the B phase or the C phase by means of the output unit. According to the invention, the wiring times and the possibility of working errors can be reduced, the working efficiency is improved, the labor intensity is lowered, the power failure time caused by test wiring can be shortened, and the power supply reliability is improved.

Description

technical field [0001] The invention relates to the field of relay protection, in particular to a wiring device and a current mutual inductance test system. Background technique [0002] Relay protection is the most basic, most important and most effective technical means to ensure the safety of power equipment and prevent and limit long-term large-scale blackouts in power systems. According to regulations, polarity test and transformation ratio test are tests that must be carried out on current transformers (CT) in the acceptance and calibration of all power system switchgears such as substations, switching stations, and user distribution rooms. [0003] At present, the three phases A, B, and C are connected to the relay protection three-phase tester in turn through the test connection line to complete the test of the polarity test and the transformation ratio test. In the prior art, when testing polarity and transformation ratio, each phase is connected separately for tes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/00G01R31/06G01R29/20
Inventor 丁镭刘东张涵孙强马万松李伟群
Owner STATE GRID CORP OF CHINA
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