Secondary wiring device for test of characteristics of a current transformer

A current transformer and characteristic testing technology, applied in the direction of measuring devices, measuring device casings, instruments, etc., can solve the problem of unresolved frequent wiring, and achieve the effect of simplifying the testing work, reducing the frequency of connecting and changing lines, and eliminating potential safety hazards.

Inactive Publication Date: 2013-02-27
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

But the invention has not solved the problem of frequent wiring

Method used

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  • Secondary wiring device for test of characteristics of a current transformer
  • Secondary wiring device for test of characteristics of a current transformer
  • Secondary wiring device for test of characteristics of a current transformer

Examples

Experimental program
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Embodiment Construction

[0015] In order to realize the function of switching between the two states of "connection test" and "short circuit to ground". Double pole double throw switch for each winding, such as figure 1 Shown: The middle terminal of the switch is the "connection terminal", which is connected to the lead wires S1 and S2 of the secondary winding of the current transformer.

[0016] When the double-pole double-throw switch is placed in the "test terminal" position, the corresponding secondary winding of the transformer is connected to the tester and enters the test state of the transformer characteristic test; the "test terminal" and the measurement port of the volt-ampere characteristic tester Connection; when the DPDT switch is placed in the "short terminal" position, the connected secondary winding is short-circuited to ground. And can be grounded through the wiring device shell. In the non-test state, ensure that there is no danger of secondary open circuit of the transformer.

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Abstract

The invention relates to a secondary wiring device for test of characteristics of a current transformer, which belongs to the field of electric system detection. One end of a double-pole double-throw switch is connected with a wiring terminal, the other end of the double-pole double-throw switch can be arranged at a test terminal or a short-circuit terminal, the wiring terminal is connected with a wire led out of a secondary winding of the current transformer, and the short-circuit terminal is grounded. The switch between a switch-on test state and a short circuit grounding state can be accomplished without wiring. The frequency of wiring and wire changing is reduced largely, and the test work is simplified. As the double-pole double-throw switch can only be in the switch-on test state or the short circuit grounding state, the potential safety hazard of a secondary open circuit of the transformer is eliminated.

Description

technical field [0001] The invention relates to a secondary wiring device for testing the characteristics of a current transformer, which belongs to the field of power system testing. Background technique [0002] The current wiring method for testing the transformation ratio, volt-ampere, and polarity of current transformers has great disadvantages, which seriously affects our test efficiency and test quality. When performing a current transformer characteristic test, the tester is only connected to one set of secondary windings of the current transformer under test when it is working, but in actual work, the secondary windings of the tested equipment can reach up to six sets. The tester shall test each group of secondary windings in turn. When one of the primary windings is energized, the other non-tested secondary windings must be short-circuited with a short wire. [0003] For example: when testing 1S, the secondary windings of 2S, 3S, 4S, 5S, and 6S must be short-circ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/04G01R31/06
Inventor 翟学周郑玲刘辉秦天
Owner STATE GRID CORP OF CHINA
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