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Easy-to-install high-voltage zero-sequence current transformer

A zero-sequence current and transformer technology, applied in the direction of inductors, transformers, transformer/inductance components, etc., can solve the problems of application and promotion restrictions, and achieve the effect of ensuring stability, reliability, firmness, strength, and ease of installation

Inactive Publication Date: 2016-08-10
申清章
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing zero-sequence current transformers are installed by means of flange installation or bonding. The installation location generally needs to be reserved, so its application and promotion are more restricted.

Method used

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  • Easy-to-install high-voltage zero-sequence current transformer
  • Easy-to-install high-voltage zero-sequence current transformer
  • Easy-to-install high-voltage zero-sequence current transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0020] This embodiment is an easy-to-install high-voltage zero-sequence current transformer, see Figure 1 to Figure 9 As shown, it includes a base pipe 1, a core pipe 2, a set of pressing jaw assembly 3, a flat nut 4 and a current transformer 9;

[0021] The inner peripheral wall of the base pipe is provided with three crimping bosses 11 along the axial direction of the base pipe, and the inner wall of each crimping boss is provided with an arc-shaped groove 111; the inner peripheral wall of the base pipe is also provided with four positioning slides along the axial direction of the substrate Groove 12; the outer peripheral wall of the core tube is provided with four supporting convex plates 21 protruding radially along the base tube, and the outer end of each supporting convex plate is located in a corresponding positioning chute, so that the core tube is supported and positioned on the base tube. In the lumen of the tube; the core tube and the base tube are concentrically a...

Embodiment 2）

[0032] This embodiment is basically the same as Embodiment 1, the difference is: see Figure 10 to Figure 12 As shown, the current transformer 9 in this embodiment includes an annular induction body 91 and an intelligent control module 92; the overall shape of the intelligent control module is also annular; the annular induction body 91 and the intelligent control module 92 are set side by side on the outer peripheral wall of the base pipe superior.

[0033] The base pipe 1 is provided with a mounting screw hole 15 radially penetrating through the wall of the base pipe; a temperature sensing device 8 is fixedly installed in the mounting screw hole.

[0034] The temperature sensing device 8 includes a metal housing 81 made of metal material with a containing groove 811, a temperature sensor 82 arranged in the containing groove, and a spring 83 for crimping the temperature sensor on the bottom wall of the containing groove , The screw tube plug 84 that is used for limit spring....

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Abstract

The invention discloses an easy-to-install high-voltage zero-sequence current transformer, which comprises a base tube, a core tube, one set of press claw component, a flat nut and a current transformer body, wherein the current transformer body sleeves the base tube; three crimping bosses are arranged on the inner circumference wall of the base tube; three radial limiting slide holes are formed in the core tube; the press claw component comprises three press claws; each press claw comprises a press plate part and a drive thread part; the press plate parts and corresponding one crimping boss are clamped to form a wire clamping hole; the press claw component and the three crimping bosses form three wire clamping holes in all; the flat nut is rotationally arranged in a tube cavity of the core tube and comprises a plane thread part which is meshed and matched with the drive thread part of each press claw; and a mounting screw hole of a built-in temperature sensing device is formed in the base tube. The easy-to-install high-voltage zero-sequence current transformer has an excellent anti-looseness effect.

Description

technical field [0001] The invention belongs to the technical field of electric power, and in particular relates to an easy-to-install high-voltage zero-sequence current transformer. Background technique [0002] The basic principle of zero-sequence current protection is based on Kirchhoff's current law: the algebraic sum of the complex current flowing into any node in the circuit is equal to zero. When the line and electrical equipment are normal, the vector sum of the currents of each phase is equal to zero. Therefore, the secondary side winding of the zero-sequence current transformer has no signal output, and the actuator does not operate. When an electric shock or leakage fault occurs, the vector sum of the currents of each phase is not zero, and the fault current causes magnetic flux in the iron core of the zero-sequence current transformer, and the current generated by the zero-sequence current transformer is the zero-sequence current. When the protection mechanism r...

Claims

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Application Information

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IPC IPC(8): H01F27/06H01F38/30H01F27/40H02G7/04F16L3/10
CPCH01F27/06F16L3/10H01F27/402H01F38/30H01F2027/406H02G7/04
Inventor 申清章
Owner 申清章
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