CN201910312U

CN201910312U - Novel intermediate voltage transformer

Info

Publication number: CN201910312U
Application number: CN2010201967137U
Authority: CN
Inventors: 周干国; 王强; 易鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-05-20
Filing date: 2010-05-20
Publication date: 2011-07-27
Anticipated expiration: 2020-05-20

Abstract

The utility model discloses a novel intermediate voltage transformer. An iron core (6) is a step-shaped or R-shaped iron core which is obtained through winding strip-shaped silicon steel plates. After heat treatment and bundling are performed for the iron core (6), a secondary coil (4) is wound on the secondary frame (5), and then a primary coil (3) and two outgoing wires (1) are wound on a primary coil (3). After drying treatment, full-vacuum pouring packaging is performed to the primary coil and the secondary coil of the iron core with novel resin. The intermediate voltage transformer has the following advantages: large capacity, high precision, partial discharge, small no load current, adoption of R-shaped or step-shaped iron core, no adjusting coil on the primary coil, capability for adjusting by the primary winding, and adoption of the novel resin for performing full-vacuum packaging.

Description

A kind of novel intermediate voltage transformer

Technical field

The utility model relates to a kind of electromagnetic unit of capacitance type potential transformer, relates in particular to a kind of novel intermediate voltage transformer.

Background technology

Intermediate voltage transformer in the electromagnetic unit, the iron core of forming by the sheet silicon steel sheet, thousands of at least, thousands of at most, not only volume is big, consumptive material is many, weight is big, and is handled by material resources such as shearing, punching press, bolted in the iron core course of processing, is adding under the stress in addition, the material lattice arrangement of silicon steel sheet inside is damaged, thereby the generation leakage field, permeability descends, and the eddy current impedance is big, the no-load loss height, dry sound is big, and iron core easily generates heat, and waits deficiency and defective, have a strong impact on the local discharging level of electromagnetic unit, technical indicators such as trueness error.

The utility model content

There is former defective at above-mentioned technology, the purpose of the present utility model provides that a kind of capacity is big, precision is high, partial discharge, no-load current are little, adopt R type or stairstepping iron core, primary winding does not have the adjustment winding, by the secondary winding adjustment, and with the novel intermediate voltage transformer of new type resin vacuum encapsulation.

For achieving the above object, the technical solution of the utility model is: a kind of novel intermediate voltage transformer is by A, N conductive contact (1), a skeleton (2), an A, B coil (3), secondary coil (4), secondary skeleton (5), iron core (6), resin (7), secondary outlet (8), A, two sections outlets of B (9) are formed, it is characterized by: by the iron core (6) of banded silicon steel sheet coiled stairstepping or R shape through heat treatment, after the wrapping, go up coiling secondary coil (4) at secondary skeleton (5) and go up coiling primary winding (3) A at a skeleton (2) again, two sections outlets of B (9), after drying was handled, once cast encapsulated with the secondary coil vacuum with iron core with new type resin.

It is the U-shaped tube structure that described A, N conductive contact (1) are located, and is convenient to insert or installs, pour into insulating material shield usefulness such as arc extinguishing.

Two sections outlets of described A, B (9) are that A contact and B contact are welded.

This novel dry type intermediate voltage transformer is compared with common like product and is had the following advantages:

1, owing to adopts the stairstepping or the alternative silicon sheet core of repeatedly adorning of R shape of banded silicon steel sheet coiling hollow, make the product compact overall structure, in light weight 1/3, the length of magnetic path is short, after heat treatment, magnetic flux leakage is little, and permeability is saturated greatly to be improved with permeability, makes its class of accuracy time error precision, can reach more than 0.2 grade, no-load current＜200mA, impedance＜600, stray capacitance＜400P.Because stairstepping or R shape iron core are after heat treatment, quality improves, and iron core column sectional area reduced to corresponding the reducing of the corresponding inside and outside diameter dimension of coiling first and second coil, can be saved copper material more than 1/3.

2, because the segmentation coiling on iron core of disposable coil, A, B section coil have increased the coil number of plies, reduced voltage between layers, improved layer insulation intensity, simultaneously, primary winding is not established the adjustment coil, reduce coil turn, make it vacuum pouring and be the resin porous in coil, extract bubble out, reduced office and discharged water flat.

3, owing to, establish in the U-shaped Tong body plug-in type be set at A, B conductive contact place. or electric installation, and can pour into gluey insulator, the shielding arc extinguishing can improve partial discharge.

Description of drawings

Fig. 1, be the utility model structural representation

Fig. 2, be the stairstepping iron core

Fig. 3, be R shape iron core

Marginal data:

1, A, N conductive contact device 2, a skeleton; 3, primary winding 4, secondary coil 5, secondary skeleton 6, iron core 7, resin 8, secondary outlet 9, two sections outlets of A, B

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

Change laminate patch shape iron core into square shape iron core that rectangular silicon steel sheet turns to stairstepping and R shape, need not bolted.Iron core Fig. 3 volume reduced cross-sectional behind the heat place, secondary coil skeleton (5), secondary coil (4), primary winding skeleton (2), primary winding (3), divide A, B two sections coilings, and the plug-in type conductive contact is set, be provided with the U-shaped cylindrical shell at A, B the end of a thread, in conjunction with relative measures, make its electric field even, improved partial discharge, be cast for one with new type resin again.

Claims

1. novel intermediate voltage transformer, form by A, N conductive contact (1), (2) A of a skeleton, B coil (3), secondary coil (4), secondary skeleton (5), iron core (6), resin (7), two sections outlets of A, B (9), it is characterized by: go up coiling secondary coil (4) by the iron core (6) of banded silicon steel sheet coiled stairstepping or R shape at secondary skeleton (5) and go up coiling primary winding (3) A, two sections outlets of B (9) at a skeleton (2) again.

2. a kind of novel intermediate voltage transformer according to claim 1 is characterized by: it is the U-shaped tube structure that described A, N conductive contact (1) are located.

3. a kind of novel intermediate voltage transformer according to claim 1 is characterized by: two sections outlets of described A, B (9) are that A contact and B contact are welded.