CN201004358Y

CN201004358Y - A bus array current mutual inductor

Info

Publication number: CN201004358Y
Application number: CNU2006201674144U
Authority: CN
Inventors: 苏保东
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-11
Filing date: 2006-12-11
Publication date: 2008-01-09
Anticipated expiration: 2016-12-11

Abstract

The utility model relates to a busbar type current transformer, which is characterized in that the utility model includes a ring iron core which is capable for being divided into two parts, an insulating object is coated outside the lower iron core, a winding is twisted outside the insulating object, casings of the epoxy resin and the engineering plastic which are provided with busbar perforations and divided into two parts are cast inside and outside the ring iron core, the joining on the two sides of the casing of the epoxy resin and the engineering plastic are correspondingly provided with two pairs of dummy clubs which are fixed by bolts, one end of the casing on one side of the busbar perforation is provided with a standing wall which is connected with the busbar through the bolts, the bottom of the casing is provided with a connection terminal, the two lead wires of the winding are respectively fixed on the connection terminals. The utility model has a fission switching type structure, so the current transformer has the advantages of easy to be fixed and used, convenient to be disassembled and maintained, easy to be implemented and simple structure, in favor of generalization.

Description

A kind of master-row type current transformer

Technical field

It is a kind of electric elements that the utility model relates to, particularly about a kind of master-row type current transformer.

Background technology

The master-row type current transformer is usually used in occasions such as power plant, transformer station, and it is mounted on the busbar that confluxes big electric current is become little electric current in proportion, for uses such as relaying protection, instrument and meter and automatics.In the prior art, the master-row type current transformer is monolithic construction, all bothers very much when installation or replacing instrument transformer, particularly when changing, needs elder generation that busbar is removed, and newer instrument transformer is sleeved on the busbar, and is very inconvenient.

Summary of the invention

At the problems referred to above, the purpose of this utility model provides a kind of folding function that has, and makes busbar install or change master-row type current transformer very easily.

For achieving the above object, the utility model is taked following technical scheme: a kind of master-row type current transformer, it is characterized in that it comprises is divided into, a following two-part annular core, outside at described bottom iron core is surrounded by insulant, outside at described insulant is wound with winding, be divided into being cast with one inside and outside the described annular core, following two parts and have the epoxy package of busbar perforating, on described, junction, following epoxy package both sides, correspondence is provided with two pairs of lugs by screw, the following epoxy package of described busbar perforating one side is provided with a wall by screw connection busbar, the bottom surface of described epoxy package is provided with binding post, and two lead-out wires of described winding are separately fixed on the described binding post.

Be provided with in the outside of described epoxy package one deck corresponding with described epoxy package shape be divided into upper and lower two-part engineering plastics shell.

The vertical cross sectional shape of described annular core is rectangle, circle, square or other shape.

The utility model is owing to take above technical scheme, it has the following advantages: 1, the utility model is because on the basis of holding current instrument transformer key property, taked the frame mode of split open-close type up and down, therefore have busbar easy to install and use, be convenient to the characteristics dismantling and safeguard.2, the utility model structural design is simple, and is easy to implement, favourable popularization.

Description of drawings

Fig. 1 is the utility model contour structures schematic diagram

Fig. 2 is the schematic side view of Fig. 1

Fig. 3 is the horizontal cross-sectional schematic of the utility model

Fig. 4 is the vertical cross-sectional schematic of the utility model

Embodiment

Below in conjunction with drawings and Examples the utility model is described in detail.

Shown in Fig. 1～4, the utility model has upper and lower two shells of being made by

engineering plastics

2,3 of busbar perforating 1 in the middle of comprising, the junction correspondence of two

shells

2,3 is provided with 4,5, two pairs of lugs 4,5 of two pairs of lugs can be fixed into one with two

shells

2,3 by two screws 6.The lower house 3 of busbar perforating 1 one sides is provided with the wall 7 of a projection, horizontally set one is installed the location hole 8 of busbar on the wall 7, be provided with upper and lower two iron cores 9,10 of forming an annular core in two

shells

2,3, be surrounded by insulant 11 on the lower core 10, be wound with winding 12 in the outside of insulant 11, the lead-out wire of winding 12 is connected on the binding post 13 of lower casing 3 bottoms setting, all waters in the space between two

shells

2,3 and two iron cores 9,10 and fills with epoxy resin 14.

The vertical cross sectional shape of above-mentioned annular core can be rectangle, circle, square or other shape.

The utility model can take following method to make:

1, makes mould according to the shape of design specification or customer requirement, make shell (dividing kerve and loam cake) with the ABS engineering plastics;

2,, make a whole iron core that adapts with two shells with silicon steel sheet according to design specification and shell shape;

3, wrap insulant in the bottom of whole iron core;

4, the copper conductor (or copper is thin) that twines certain number of turn by designing requirement in the whole mandrel lower that is surrounded by insulant is called winding;

5, the whole iron core that will be surrounded by winding is put into lower casing, the winding that has on the iron core is had the direction of outlet terminal towards shell, and fix;

6, the lead-out wire winding direction in accordance with regulations with winding is welded on the leading-out terminal respectively;

7, with off-the-shelf poured with epoxy resin in the kerve of lower casing; After filling, the loam cake of shell is built, and made kerve and loam cake be fixed into one.

8, after epoxy resin to be cast solidifies,, instrument transformer is divided into upper and lower two parts with cutting.

9, the section with saw kerf polishes, and twists the screw on the lug of the good left and right sides;

10, carry out electric parameter measurement, make it the value of adhering to specification and get final product.

The utility model also can not be provided with two

engineering plastics shells

2,3, directly puts into whole iron core in mould, after the casting epoxy resin moulding, is sawn into upper and lower two parts, and be arranged on upper and lower iron core 9,10 inside and outside shells this moment is epoxy packages.

" open-close type " master-row type current transformer that the utility model is manufactured adopts following method to install:

1, pulls down the screw 6 that connects on 2,3 liang of lugs 4,5 of upper and lower casing, make its separated into two parts;

2, with the appropriate location of the screw on the usefulness wall 7 of lower part at busbar;

3, with two screws 6 upper and lower two parts are linked together again;

4, the lead-out wire of winding 12 is connected on the terminal tightens.

Claims

1, a kind of master-row type current transformer, it is characterized in that it comprises is divided into, a following two-part annular core, outside at described bottom iron core is surrounded by insulant, outside at described insulant is wound with winding, inside and outside described annular core, be cast with a separated into two parts and have the epoxy package of busbar perforating, junction, described epoxy package both sides, correspondence is provided with two pairs of lugs by screw, the following epoxy package of described busbar perforating one side is provided with a wall by screw connection busbar, the bottom surface of described epoxy package is provided with binding post, and two lead-out wires of described winding are separately fixed on the described binding post.

2, a kind of master-row type current transformer as claimed in claim 1 is characterized in that: be provided with one deck divided into two parts engineering plastics shell corresponding with described epoxy package shape in the outside of described epoxy package.

3, a kind of master-row type current transformer as claimed in claim 1 or 2, it is characterized in that: the vertical cross sectional shape of described annular core is a rectangle.

4, a kind of master-row type current transformer as claimed in claim 1 or 2 is characterized in that: the vertical cross sectional shape of described annular core is for circular.

5, a kind of master-row type current transformer as claimed in claim 1 or 2, it is characterized in that: the vertical cross sectional shape of described annular core is square.