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Zero-sequence current transformer with relatively good wire clamping fastness

A zero-sequence current and transformer technology, applied in the field of electric power, can solve problems such as application and promotion restrictions, and achieve the effect of ensuring stable reliability, stable and reliable firm strength, and excellent anti-loosening effect.

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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  • Zero-sequence current transformer with relatively good wire clamping fastness
  • Zero-sequence current transformer with relatively good wire clamping fastness
  • Zero-sequence current transformer with relatively good wire clamping fastness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0017] This embodiment is a zero-sequence current transformer with better clamping fastness, see Figure 1 to Figure 6 As shown, it includes a base pipe 1 , a core pipe 2 , two sets of pressing jaw assemblies 3 , a flat nut 4 and a current transformer 9 .

[0018] 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 Slot 12; the core tube and the base tube are concentrically arranged and located in the base tube lumen; the outer peripheral wall of the core tube is provided with four supporting convex plates 21 protruding radially along the core tube, and the outer ends of each supporting convex plate are located at corresponding to a positioning chute, so that the core tube is supported and...

Embodiment 2）

[0028] This embodiment is basically the same as Embodiment 1, the difference is: see Figure 7 to Figure 9 As shown, the current transformer 9 in this embodiment includes a ring-shaped sensing body 91 and an intelligent control module 92; the overall shape of the smart control module is also ring-shaped; the ring-shaped sensing body 91 and the smart control module 92 are arranged side by side on the outer wall of the base pipe.

[0029] 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.

[0030] 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.

[0031]One end 812 o...

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Abstract

The invention discloses a zero-sequence current transformer with relatively good wire clamping fastness. The zero-sequence current transformer comprises a base tube, a core tube, two sets of press claw components, a flat nut and a current transformer body, wherein three crimping bosses are formed on the inner circumference wall of the base tube; six radial limiting slide holes are formed in the tube wall of the core tube; the current transformer body sleeves the outer wall of the base tube; each set of press claw components comprise three press claws; the flat nut is rotationally arranged in the tube cavity of the core tube; two side ends, along the axial direction of the core tube, of the flat nut are provided with plane thread parts respectively; a fastening part is arranged at the center of the flat nut; each plane thread part is meshed and matched with the drive thread parts of the press claws in one corresponding set of press claw components; and a mounting screw hole with a built-in temperature sensing device is formed in the base tube. The zero-sequence current transformer has a relatively good anti-looseness effect.

Description

technical field [0001] The invention belongs to the technical field of electric power, and in particular relates to a zero-sequence current transformer with better clamping fastness. 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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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/06H01F38/30H01F27/40H02G7/04F16L3/10G01K7/22
CPCH01F27/06F16L3/10G01K7/22H01F27/402H01F38/30H01F2027/406H02G7/04
Inventor 申清章
Owner 申清章
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