CN200972825Y

CN200972825Y - Combined mutual inductor

Info

Publication number: CN200972825Y
Application number: CN 200620067606
Authority: CN
Inventors: 何泽坚
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-11-08
Filing date: 2006-11-08
Publication date: 2007-11-07
Anticipated expiration: 2016-11-08

Abstract

The utility model discloses a built-up mutual inductor that comprises a voltage mutual inductor and current mutual inductors. The voltage mutual inductor has a three-pole iron core, and A-phase, B-phase and C-phase coils are respectively wound on the iron core. Two same current mutual inductors are provided at the upper end of the iron core, and the primary coils of the current mutual inductors are respectively connected with a primary copper raft and AC-phase coil. The current mutual inductors, the voltage mutual inductor and the B-phase copper raft are integrated into an entire body via solid insulation. The utility model has a reasonable layout, a compact structure and convenient maintenance.

Description

A kind of combined instrument transformer

Technical field

The utility model relates to a kind of combination transformer.

Background technology

At present, the combined instrument transformer that in electric power system, uses, how by independently two single-phase potential transformers and two monophase current instrument transformer combinations, this structural volume is huge, the wiring complexity, maintenance and use are inconvenient.

Summary of the invention

In order to overcome the deficiencies in the prior art, the utility model provides a kind of volume combined instrument transformer little, simple in structure and easy to maintenance.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of combined instrument transformer, comprise the voltage transformer summation current transformer, the voltage transformer summation current transformer is wrapped with insulating barrier, be provided with three-limb core in the described voltage transformer, all be wound with two coils of same structure on its left post and the right post, wherein there is one to extract into A phase coil and C phase coil out respectively, two other one-tenth B phase coil parallel with one another, described current transformer comprises current transformer core, around primary winding and secondary coil thereon, primary winding is connected with a copper bar, described insulating barrier is a solid insulation, current transformer and voltage transformer are cast into integral structure by solid insulation, current transformer comprise the identical A of structure mutually with C mutually, place left post and right post upper end respectively, primary winding is connected with the C phase coil with the A phase coil respectively, and middle column top is provided with the B phase copper bar that casts in the solid insulation, and this copper bar is connected with the B phase coil.

Wherein, described A phase current mutual inductor and C phase current mutual inductor are that in-line is transversely arranged.

Wherein, described current transformer core is square shape or annular.

The beneficial effects of the utility model are: the shared iron core of threephase potential transformer, current transformer is arranged on above the voltage transformer, comprise that high-voltage connection terminal casts in together by solid insulation, the structure of integral type make integral layout rationally, compact conformation and easy to maintenance.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a front section view of the present utility model;

Fig. 2 is that side A-A of the present utility model is to cutaway view.

Embodiment

As Fig. 1, shown in Figure 2, a kind of combined instrument transformer, comprise the voltage transformer summation current transformer, the voltage transformer summation current transformer is wrapped with insulating barrier 4, be provided with three-limb core in the described voltage transformer, comprise left post 1, center pillar 2 and right post 3, all be wound with same structure on left side post 1 and the right post 3, be two coils 5 arranging up and down, wherein there is one to extract into A phase coil and C phase coil out respectively, two remaining coil one-tenth parallel with one another B phase coils, B copper bar 10 connections mutually with center pillar 2 tops, described current transformer has two, form respectively A mutually with C mutually, each current transformer includes primary winding 8 and the secondary coil 7 on the current transformer core 6, primary winding 8 one ends are connected with a copper bar 9, the other end is connected with the A/C phase coil, be connected with the secondary outlet embedding female 12 of bottom by lead 11 between the coil of voltage transformer, the insulating barrier 4 of voltage transformer summation current transformer outer wrapping is a solid insulation, can select the epoxide resin material insulation for use, the shared iron core of threephase potential transformer, simplified the space, the while current transformer, voltage transformer and B copper bar 10 mutually are cast into integral structure by solid insulation, integral layout is reasonable, compact conformation.

As further improvement of the utility model, above-mentioned A phase current mutual inductor and C phase current mutual inductor are that in-line is transversely arranged, and current transformer core 6 is square shape or annular, and this core structure can make current transformer take up space to reduce greatly.

Further improve as the utility model; a described copper bar 9 is covered with insulated envelope 13; leave sealing hole on this insulated envelope 13; wiring enters from sealing hole; add the protection of insulated envelope 13; high-voltage connection terminal is isolated from the outside comes, can prevent the generation of getting an electric shock, leaking electricity and stealing accidents such as electricity, security performance strengthens greatly.

Above-mentioned just the utility model preferred embodiment but should not constitute restriction of the present utility model, so long as adopt the technical scheme that is equal to the utility model, and also should be within the protection range of the invention.

Claims

1. combined instrument transformer, comprise the voltage transformer summation current transformer, the voltage transformer summation current transformer is wrapped with insulating barrier (4), be provided with three-limb core in the described voltage transformer, all be wound with two coils (5) of same structure on its left post (1) and the right post (3), wherein there is one to extract into A phase coil and C phase coil out respectively, two other one-tenth B phase coil parallel with one another, described current transformer comprises current transformer core (6), around primary winding (8) and secondary coil (7) thereon, primary winding (8) is connected with a copper bar (9), it is characterized in that: described insulating barrier (4) is a solid insulation, current transformer and voltage transformer are cast into integral structure by solid insulation, current transformer comprise the identical A of structure mutually with C mutually, place left post (1) and right post (3) upper end respectively, primary winding (8) is connected with the C phase coil with the A phase coil respectively, center pillar (2) top is provided with the B phase copper bar (10) that casts in the solid insulation, and B phase copper bar (10) is connected with the B phase coil.

2. a kind of combined instrument transformer according to claim 1 is characterized in that: described A phase current mutual inductor and C phase current mutual inductor are that in-line is transversely arranged.

3. a kind of combined instrument transformer according to claim 1 and 2 is characterized in that: described current transformer core (6) is square shape or annular.

4. a kind of combined instrument transformer according to claim 3 is characterized in that: a described copper bar (9) is covered with insulated envelope (13), and this insulated envelope leaves sealing hole on (13).