Secondary side open circuit protector circuit of intelligent selection current transformer winding

A current transformer and protector circuit technology, which is applied in the field of intelligent selection of current transformer winding secondary side open circuit protector circuit, can solve the problems of CT open circuit protector inflexibility, shielding, secondary side voltage rise, etc., and achieves convenience Inquiry and maintenance, troubleshooting, and the effect of preventing electrical malfunctions

Inactive Publication Date: 2016-11-16
合肥仁德电子科技有限公司
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AI Technical Summary

Problems solved by technology

[0002] With the increasing maturity of electrical automation, various protective components emerge in an endless stream. In the power system, the current transformer can reduce the large current to a small current for protection and measurement. However, if the equipment runs for a long time, or the current transformer during transportation The open circuit of the secondary side will cause the voltage of the secondary side to rise, which will seriously affect the protection and even endanger the safety of personal property.
In today's existing products, the CT open-circuit protector is inflexible. If the single-phase protection circuit current is open-circuited, the protector will be connected to the ground through the varistor, so that the secondary side of the transformer will form a circuit, but at the same time the The protection function of the phase is also shielded, and the protection measurement and control unit connected to the phase has no effect

Method used

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  • Secondary side open circuit protector circuit of intelligent selection current transformer winding

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Embodiment Construction

[0011] refer to figure 1 , which includes an open-circuit protector, a measuring unit winding circuit, and a protection unit winding circuit, and the measuring unit winding circuit and the protection unit winding circuit are respectively connected with the open-circuit protector.

[0012] The measuring unit winding circuit includes three windings and a measuring unit, the three windings are connected in parallel, and the three windings are respectively connected with the measuring unit.

[0013] The protection unit winding resistance circuit includes three windings and a protection unit, the three windings are connected in parallel, and the three windings are respectively connected with the protection unit.

[0014] The open-circuit protector includes an intelligent monitor and a varistor. The intelligent monitor has six output ports, which are respectively connected with the winding circuit of the measurement unit and the six windings of the winding resistance circuit of the ...

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Abstract

The invention relates to an intelligent selection current transformer winding secondary side open-circuit protector circuit, which relates to the technical field of power transmission and distribution switchgear. It is characterized in that it comprises an open-circuit protector, a measuring unit winding circuit, a protection unit winding circuit, and the measuring unit winding circuit and the protection unit winding circuit are respectively connected with the open-circuit protector. The invention has the characteristics of simple structure, convenient operation, effective inquiry and maintenance of lines and the like.

Description

technical field [0001] The invention relates to the technical field of power transmission and distribution switchgear, in particular to an intelligently selected secondary side open circuit protector circuit of a current transformer winding. Background technique [0002] With the increasing maturity of electrical automation, various protective components emerge in an endless stream. In the power system, the current transformer can reduce the large current to a small current for protection and measurement, but if the equipment runs for a long time, or the current transformer is in transit The open circuit of the secondary side will cause the voltage of the secondary side to rise, which will seriously affect the protection and even endanger the safety of personal and property. In today's existing products, the CT open circuit protector is inflexible. If the single-phase protection circuit current is open, the protector will be connected to the ground through the varistor, so t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/00H02H9/04
CPCH02H7/00H02H9/041
Inventor 李阳
Owner 合肥仁德电子科技有限公司
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