High-voltage capacitive type voltage transformer routine test interconnecting box with method with no need for dismounting lead

A technology of voltage transformers and high-voltage capacitors, which is applied to the parts of electrical measuring instruments, instruments, and measuring electrical variables, etc., can solve problems that affect the work progress of substations and low efficiency, and reduce the number of ladders and wiring times. The effect of test efficiency and simple operation

Active Publication Date: 2016-12-14
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the current routine test efficiency of CVT is low, which affects the progress of the overall routine test work of the substation.

Method used

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  • High-voltage capacitive type voltage transformer routine test interconnecting box with method with no need for dismounting lead
  • High-voltage capacitive type voltage transformer routine test interconnecting box with method with no need for dismounting lead

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] like figure 1 As shown, it is an embodiment of the junction box for the routine test of the high-voltage capacitive voltage transformer of the present invention without removing the lead wires. In this embodiment, the transition box includes a box body and a main panel, and the box body is made of insulating material. The main panel has three areas: operation area 1, equipment area 2 and instrument area 3. The operation area 1 includes an AC ammeter 4 and a changeover switch 5 for switching the internal connection mode of the box body. In the equipment area 2, there are four equipment ter...

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Abstract

The present invention discloses a high-voltage capacitive type voltage transformer routine test interconnecting box with method with no need for dismounting a lead, and relates to the field of the electric power and voltage transformer test technology. The interconnecting box comprises a box body and a main panel arranged at the upper surface of the box body, the device binding post of the main panel is connected with the insulation wire and a tested device, and the device binding post is connected with a tester through the testing line matching a testing tester itself. The alternative switch of the operation area of the main panel can switch the wire connection mode of the inner space in the box body to realize the purpose of completing two test modes with no need for dismounting the lead. The interconnecting box is convenient to carry, simple to operate and reliable and safe so as to reduce the number of times of workers' climbing and wiring so as to improve the effect of CVT routine test efficiency.

Description

technical field [0001] The invention relates to the technical field of power voltage transformer testing. Background technique [0002] Traditional electromagnetic voltage transformers in power systems with a voltage level of 110kV and above are prone to resonant overvoltages with circuit breaker fracture equalizing capacitors. Therefore, capacitive voltage transformers (CVT ). The working principle of the capacitive voltage transformer is to divide the voltage by the series capacitor first, and then step down and isolate it through the electromagnetic voltage transformer. In order to ensure the safe and normal operation of the CVT, routine tests are carried out on a regular basis. There are two main routine test items, namely, the measurement of the insulation resistance of each internal part and the measurement of the capacitance and dielectric loss. The measurement of capacitance and dielectric loss is one of the important parameters to judge the insulation state of CVT...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/04G01R35/02
CPCG01R1/0416G01R35/02
Inventor 刘钊冯正军王凯王立兵杨彬乔红军刘胜军王佼李海璇李莉田芳冯红刚蒲倩刘惠斌张昆刘洋洋李晓溪
Owner STATE GRID CORP OF CHINA
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