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
CN104953547AInactive Publication Date: 2015-09-30ANHUI RUIHONG MDT INFOTECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ANHUI RUIHONG MDT INFOTECH
Publication Date
2015-09-30
Estimated Expiration
Not applicable Β· inactive patent

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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.
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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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