CN203085341U

CN203085341U - Transformer for gas insulation counter

Info

Publication number: CN203085341U
Application number: CN 201320063563
Authority: CN
Inventors: 中岛宗一
Original assignee: Nissin Electric Co Ltd
Current assignee: Nissin Electric Co Ltd
Priority date: 2012-02-08
Filing date: 2013-02-04
Publication date: 2013-07-24
Anticipated expiration: 2023-02-04
Also published as: JP2013162059A

Abstract

The utility model provides a transformer for a gas insulation counter. As a voltage transformation element of the transformer for the gas insulation counter, due to the fact that a low-voltage shielding piece 1e is needed to carry out electric field attenuation, the problem that price of products rises due to the increased number of parts is caused. In addition, the problem that operation time of assembly is prolonged due to the increased number of the parts. The transformer for the gas insulation counter which is provided with the voltage transformation element is a gas voltage transformer (VT), and the voltage transformation element comprises an iron core, an iron core fastening piece, a secondary coil, a primary coil, a high-voltage shielding piece and the low-voltage shielding piece, wherein the iron core is formed by rectangular sheet steel plates in a stacked mode, the iron core fastening piece is used for fixing the iron core, the secondary coil is wound on the iron core, the primary coil is wound on the outer side of the secondary coil, the high-voltage shielding piece is installed on the periphery of the primary coil, and the low-voltage shielding piece is arranged in a mode of covering the iron core and the iron core fastening piece. The transformer for the gas insulation counter is characterized in that the iron core fastening piece and the low-voltage shielding piece are integrally formed.

Description

Gas-insulated meter transformer

Technical field

The utility model relates to the bus of a kind of and electric substation etc. or gas-insulated meter that circuit is connected with transformer (below, be designated as gas VT)

Background technology

Gas VT has following structure: received the transformation element in container contents, this transformation element comprise rectangle iron core, be wound on primary winding and secondary coil on the shank of above-mentioned iron core; In container, enclose SF is arranged ₆Deng dielectric.This gas VT is assembled in the gas-insulated switchgear device (below, be designated as GIS) usually, is used for bus, circuit are carried out transformation and to meter, relay service voltage.

With Fig. 4 and Fig. 5 example in the past is described.Fig. 4 is the figure of expression transformation element 1.Transformation element 1 has the iron core 1a that forms rectangular shape.Iron core 1a is made of the duplexer of steel plate, is wound with secondary coil 1b across the secondary coil frame, is wound with primary winding 1c in the outside of secondary coil 1b by the primary winding frame.In the outside of primary winding 1c high voltage shield 1d is installed.

Iron core 1a constitutes by laminal steel plate is stacked, and 1f fixes by the iron core securing member.To cover the mode of these iron cores 1a and iron core securing member 1f, low pressure shielding part 1e is installed from three directions.Utilize the covering of low pressure shielding part 1e, can carry out the electric field decay of low-pressure side iron core 1a and iron core securing member 1f.

The mode that records in patent documentation 1 with the periphery of the primary winding that surrounds the transformer body is provided with high voltage shield (electric field decay shielding part).

Patent documentation 1: Japanese kokai publication hei 07-130561 communique

The utility model content

With the iron core 1a of covering formation transformation element and the mode of iron core securing member 1f low pressure shielding part 1e is installed.Because iron core 1a and iron core securing member 1f are covered by low pressure shielding part 1e, thereby can carry out the electric field decay of low-pressure side.As above said, owing to must carry out the electric field decay, therefore produced such problem because the price of the product that increase brought of part number raises with low pressure shielding part 1e.And there is because the part number increases the problem that the activity duration that causes assembling increases.

In order to solve above-mentioned problem, gas VT of the present utility model is the gas-insulated meter transformer with transformation element, and this transformation element comprises: iron core, and it constitutes by rectangular-shaped sheet steel flaggy is folded; The iron core securing member, it is used for fixing above-mentioned iron core; Secondary coil, it is wound on the above-mentioned iron core; Primary winding, it is wound on the outside of above-mentioned secondary coil; High voltage shield, it is installed in the periphery of above-mentioned primary winding; And the low pressure shielding part, it is provided with in the mode that covers above-mentioned iron core and above-mentioned iron core securing member, it is characterized in that, and above-mentioned iron core securing member and low pressure shielding part are integrally formed.

Adopt the utility model,, do not use part just can constitute the transformation element as the low pressure shielding part by on the iron core securing member, forming the low pressure shielding part.Therefore, can remove employed low pressure shielding part in the past, and provide the part number few, low-cost gas VT.

Description of drawings

Fig. 1 is the figure of the transformation element of the gas VT in the expression execution mode of the present utility model.

Fig. 2 is the A-A view of Fig. 1.

Fig. 3 is the figure that the inside of expression three-phase gas VT constitutes.

Fig. 4 is the figure that represents the transformation element of gas VT in the past.

Fig. 5 is the A-A view of Fig. 4.

Description of reference numerals

1 transformation element

The 1a iron core

The 1b secondary coil

The 1c primary winding

The 1d high voltage shield

1e low pressure shielding part

1f iron core securing member

1g low pressure shielding part portion

2 containers

3 conversion flanges

4 insulation spacers

The 4a embedded conductor

5 bonding conductors

Embodiment

Below, utilize Fig. 1 and Fig. 2 that embodiment of the present utility model is described.Fig. 1 is the figure of structure of the transformation element of the gas VT of expression in the execution mode of the present utility model.Fig. 2 is the A-A view of the transformation element of Fig. 1.

Transformation element 1 has the iron core 1a that forms rectangular shape.Iron core 1a is made of the duplexer of steel plate, is wound with secondary coil 1b by the secondary coil frame, is wound with primary winding 1c in the outside of secondary coil 1b by the primary winding frame.Electric field decay shielding part 1d disposes electric field decay shielding part 1d in the mode of surrounding primary winding 1c, and this electric field decay shielding part 1d holds concurrently as a terminal of non-ground connection side.

As shown in Figure 2, iron core 1a constitutes by laminal steel plate is stacked, being that the mode of the iron core securing member 1f clamping of コ word shape (Japanese ideogram コ) is fixed by cross sectional shape.Coil sides at these iron core securing members 1f is provided with the low pressure shielding part 1g of portion.

The low pressure shielding part 1g of portion is integrally formed with the mode and the iron core securing member 1f that are covered by iron core securing member 1f around the coiler part.This low pressure shielding part 1g of portion be by for example to the end of iron core securing member 1f cut, crooked processing forms.

Utilize Fig. 3 that the formation of gas VT integral body is described.Need to prove, describe, be not limited to three-phase, also be applicable to single-phase though Ben Tu is example with the three-phase.Transformation element 1 all is accommodated in three-phase in the container 2.Need to prove, only record a phase of transformation element 1 among the figure.

One end of container 2 is equipped with insulating barrier 4 airtightly by conversion flange 3.Enclose in the container 2 SF is arranged ₆Dielectrics such as gas.Embedded conductor 4a is installed in insulation spacer 4.Therefore, bonding conductor 5 is installed on embedded conductor 4a, and is configured with the mode that electric field shielding spare 1d contacts with bonding conductor 5.

Claims

1. gas-insulated meter transformer, this gas-insulated meter comprises with the transformation element that transformer has:

Iron core, it constitutes by rectangular-shaped sheet steel flaggy is folded;

The iron core securing member, it is used for fixing above-mentioned iron core;

Secondary coil, it is wound on the above-mentioned iron core;

Primary winding, it is wound on the outside of above-mentioned secondary coil;

High voltage shield, it is installed in the periphery of above-mentioned primary winding; And

The low pressure shielding part, it is provided with in the mode that covers above-mentioned iron core and above-mentioned iron core securing member, it is characterized in that,

Above-mentioned iron core securing member and low pressure shielding part are integrally formed.