Secondary side open-circuit protector circuit adopting windings and used for intelligent selection current transformer

A technology of current transformer and protector circuit is applied in the field of intelligent selection of secondary side open circuit protector circuit of current transformer winding, which can solve the problems of inflexibility of CT open circuit protector, increase of secondary side voltage and shielding, etc. The effect of convenient inquiry and maintenance, prevention of electrical malfunction, and troubleshooting

Inactive Publication Date: 2015-09-30
ANHUI RUIHONG MDT INFOTECH
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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 adopting windings and used for intelligent selection current transformer

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Embodiment Construction

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

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

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

[0014] The open circuit protector includes an intelligent monitor and a piezoresistor. There are six output ports on the intelligent monitor, which are respectively connected to six windings of the measuring unit winding circuit and the protection unit winding circuit. The piezoresistor...

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Abstract

The invention provides a secondary side open-circuit protector circuit adopting windings and used for an intelligent selection current transformer and relates to the technical field of power transmission and distribution switch equipment. The secondary side open-circuit protector circuit is characterized by comprising an open-circuit protector, a measurement unit winding circuit and a protection unit winding circuit, wherein the measurement unit winding circuit and the protection unit winding circuit are connected with the open-circuit protector respectively. The protector circuit has the characteristics of simple structure, convenience in operation, convenience in effective inquiry and maintenance and the like.

Description

technical field [0001] The invention relates to the technical field of power transmission and distribution switchgear, in particular to an intelligent selection current transformer winding secondary side open circuit protector circuit. 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. 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 v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/00
Inventor 谢海亭
Owner ANHUI RUIHONG MDT INFOTECH
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