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High-voltage live access apparatus for current transformer

A technology of current transformer and high-voltage live, which is applied in the field of current transformer high-voltage live connection device

Active Publication Date: 2013-10-02
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

This method belongs to an indirect test method of current transformer error, and the effectiveness, accuracy and safety of its error test still need to be verified by more experiments

Method used

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  • High-voltage live access apparatus for current transformer
  • High-voltage live access apparatus for current transformer

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Experimental program
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Embodiment Construction

[0013] Explanation of terms: open current transformer: open CT for short.

[0014] Marks in the drawings: 1—opening CT, 2—main insulator, 3—auxiliary insulator, 4—horizontal moving platform, 5—screw lifting mechanism, 6—vertical hydraulic lifting mechanism, 7—flat car, 8—vertical connecting rod , 9—first hinge, 10—horizontal connecting rod, 11—second hinge, 12—locating pin.

[0015] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0016] as attached figure 1 and 2 As shown, the current transformer high-voltage live access device of the present invention includes an opening CT1, a main insulator 2, an auxiliary insulator 3, a screw lifting mechanism 5, a horizontal moving platform 4, a vertical hydraulic lifting mechanism 6 and a flatbed truck 7. The opening CT1 is mounted on the main insulator 2 . The iron core of the opening CT1 is cut into two halves, and the two halves of the iron core are connected by...

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Abstract

The invention relates to the field of calibration, verification and detection of electric power equipment, and especially relates to a high-voltage live access apparatus for a current transformer. The high-voltage live access apparatus comprises an opening CT, a main insulator and an opening on-off apparatus. The opening on-off apparatus is used for opening or closing the opening CT, and measurement of primary bus current or an online calibration test of the current transformer is conducted by connecting the current transformer which is relatively large in weight into a primary high-voltage bus in the case that the system is not powered off and the primary bus is not disconnected. Therefore, the workload is substantially reduced and economic loss caused by a power outage of the system is prevented.

Description

technical field [0001] The invention relates to the field of calibration, verification and detection of electric equipment, in particular to a high-voltage live connection device for a current transformer. Background technique [0002] The current transformer used for gateway metering in the power grid must be regularly tested for error characteristics. According to the conventional detection method, the line where the current transformer to be tested must be powered off and the line must be disconnected. This has brought a lot of economic loss and a lot of workload, and some lines cannot be powered off at all, otherwise it will affect the production and life of the region. In addition, in some scientific research projects, it is also necessary to measure the current in the primary high-voltage bus. The previous technology used the method of live work to connect the standard current transformer to the busbar. This method has certain risks and is only suitable for light-weig...

Claims

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Application Information

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IPC IPC(8): G01R35/02
Inventor 章述汉李前李鹤袁建平胡宗泉熊前柱胡浩亮李登云杨春燕
Owner STATE GRID CORP OF CHINA
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