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A medium-voltage isolation knife and a capacitive voltage transformer

An isolation knife, medium voltage technology, applied in the direction of voltage/current isolation, electrical components, etc., can solve problems such as increased safety hazards, time-consuming and labor-intensive, etc., to achieve the effect of convenient testing and maintenance

Inactive Publication Date: 2018-12-14
江苏鑫航电力设备工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, when testing a capacitive voltage transformer, it is necessary to remove the capacitive voltage divider before testing, which not only takes time and effort but also increases potential safety hazards; For maintenance, it is also necessary to stop the product from running

Method used

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  • A medium-voltage isolation knife and a capacitive voltage transformer

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Embodiment

[0018] see figure 1 , the present invention discloses a medium-voltage isolation knife, which includes a switch contact knife 1 and a rocker arm isolation knife handle 4. The switch contact knife 1 includes a sleeve 11 and a contact knife 12. The sleeve 11 is a hollow structure. The contact knife 12 is fixed at one end of the sleeve 11, the contact knife 12 is close to the end face of the sleeve 11, and the angle range between the contact knife 12 and the sleeve 11 is 80°-100°, The sleeve 11 and the contact knife 12 are welded and connected, and the material of the sleeve 11 and the contact knife 12 is stainless steel. The rocker arm isolation knife handle 4 includes a small shaft 41 and a handle 42. One end of the small shaft 41 Extend into the sleeve 11 from the other end of the sleeve 11, the sleeve 11 is provided with a first fixing hole, the small shaft 41 is provided with a second fixing hole, and the small shaft 41 extends into the The sleeve 11 is aligned up and down ...

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Abstract

A medium-voltage isolation knife disclosed in the invention comprises a switch contact knife and a rocker arm isolating knife handle, A switch contact knife comprise a sleeve and a contact knife, Thesleeve is hollow structure, the contact knife is fixed on one end of the sleeve, the rocker arm isolation knife handle comprises a small shaft and a handle, one end of the small shaft extends into thesleeve from the other end of the sleeve, the handle is fixed on the other end of the small shaft, the handle is used for driving the small shaft to rotate, thereby driving the sleeve and the contactknife to rotate, and realizing the opening and closing of the contact knife. The medium-voltage isolation knife is installed on the capacitive voltage transformer for testing. In the field test, the capacitance and dielectric loss and the induced withstand voltage of the electromagnetic unit can be easily tested by operating the external operation handle to close the medium-voltage isolation knife. In addition, the internal components of the outlet box of the mutual inductor can be inspected and repaired by closing the medium-voltage isolation knife, which is more convenient and safe for the test and inspection of the mutual inductor.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to a medium-voltage isolation knife and a capacitive voltage transformer. Background technique [0002] The capacitive voltage transformer is divided by series capacitors, and then stepped down and isolated by the electromagnetic transformer. It is used as a voltage transformer for meters and relay protection. The capacitive voltage transformer can also couple the carrier frequency to Transmission lines are used for long-distance communication, remote measurement, selective line high-frequency protection, remote control, teletype, etc. Therefore, compared with conventional electromagnetic voltage transformers, capacitive voltage transformers can prevent In addition to ferromagnetic resonance caused by iron core saturation, there are many advantages in economy and safety. Capacitive voltage transformers are mainly composed of capacitive voltage dividers and medium-voltage tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H21/54G01R15/18
CPCH01H21/54G01R15/18
Inventor 刘英
Owner 江苏鑫航电力设备工程有限公司
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