epoxy resin impregnated paper bushings - siemens energy sector china - siemens

1/20/2014 Epoxy Resin Impregnated Paper Bushings - Siemens Energy Sector China - Siemens

http://www.energy.siemens.com.cn/Energy/powerTransmission/HV%20products/ERIP/Pages/Default.aspx 1/3

Trench High Voltage Products Ltd., Shenyang

Tel.: +86 24 8892 3999

Fax: +86 24 8973 7200

[email protected]

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Epoxy Resin Impregnated Paper Bushings

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In Chinese


Overview

Type HETA Voltage Range 17.5kV to 40.5kV

Type ETG Voltage Range 72.5kV to 800kV

Type ETO Voltage Range 72.5kV to 550kV

Type ETA Voltage Range 24kV to 420kV

Type ETA (DC) Voltage range ±17.5kV~±500kV

Type EGA Voltage Range 145kV to 550kV

Type EAA Voltage Range 72.5kV to 252kV

Type HETA Voltage Range 17.5kV to 40.5kV

High current bushings for transformer to phase

busbar isolated connections.

Features

Central aluminium conductor cast in one piece w ithout

joints.

Main insulation : vacuum impregnated epoxy condenser.

Solid f illing available : permits mounting at any angle.

Thermal stability : excellent.

Partial discharge : less than 10pC at 1.5Un.

Freedom from oil leakage from the transformer in the event

of porcelain breakage.

Current transformer accommodation can be provided on

request.

Test tapping : standard.

Designs available to cover IEC, ANSI and other

International Specif ications.

Voltages from 17.5kV to 40.5kV and current from 6300A

to 31500A

Type ETG Voltage Range 72.5kV to 800kV

Bushings for transformer to gas insulated switchgear

connections.

Description

The epoxy resin impregnated paper range provides the very highest

standard in bushing technology. Every product is impulse tested as

a routine so you can be assured of high reliability and a low cost.

With over 30 years experience in the f ield of oil free bushing

applications our engineers can support all your through life needs.

The bushings detailed show our product range w hich is suitable for

connecting oil f illed transformers directly to SF6 metalclad

sw itchgear or ducting.

Features

The design is compatible w ith the requirements of IEC 61639 for the GIS to transformer

interface. Other dimensions can be provided on request

The ETG bushing range is provided for a full range of operating ratings to IEC and ANSI

Standards

Epoxy resin impregnated paper insulation. Vacuum impregnation of the condenser core

gives excellent partial discharge performance

Oil free solid insulation provides no f ire or explosion risk w ith the bushing

Design allow s for differential expansion across normal operating temperature range

lnsulation is gas tight and w hen combined w ith an effective sealing ring system w ill provide

<10-5 torr litres per second Ieakage

Connecting f lange is also gas tight and incorporates a self grounding test tapping for through

life capacitance and tan delta measurement

Non-standard CT accommodation and corona shields can be provided on request

All bushings are electrically tested w ith a simulation of the service arrangement, preventing

oil contamination of the gas side

Siemens Energy


mailto:[email protected]

http://www.energy.siemens.com.cn/Energy/downloadCenter/Documents/E_T_THVS_ERIP%20Bushing.pdf

http://www.energy.siemens.com.cn/Energy/downloadCenter/Documents/E_T_THVS_%E5%B9%B2%E5%BC%8F%E5%A5%97%E7%AE%A1%E6%A0%B7%E6%9C%AC.pdf

http://www.siemens.com/



Type ETO Voltage Range 72.5kV to 550kV

Bushings for transformer to cable box or oil filled equipment.

Description

Epoxy resin impregnated paper condenser oil/ oil (ETO) bushings are

used for connecting transformers directly to cable boxes or oil f illed

equipment. The bushing may be mounted vertically or horizontally or at

any service angle.

The primary insulation of ETO bushings is made from superior grade

insulating paper and foil, w ound onto a mandrel, w hich forms partial

condenser layers to control electrical stress.

The inherent insulation properties of the cast epoxy makes it

unnecessary to use porcelain and any other protective enclosure, and

the insulation can contact w ith oil directly. The compact design of ETO

bushing is completely free of oil or pressurized gas, w hich greatly minimizes the risk of f ire

and explosion.

The bushing f lange dimensions and design of the bushing terminals can be adapted to suit the

specif ic requirements of both transformer and oil f illed equipment. Corona shields may be

provided if required. Draw lead connection designs can also be provided.

Features

The ETO bushing can be provided on request

The ETO bushing range is provided for a full range of operating ratings to IECand ANSI

Standards





Connecting f lange incorporates a remote test tapping for capacitance and tan delta

measurement during periodical maintenance


Type ETA Voltage Range 24kV to 420kV

Bushings for transformer to air.

Description

Epoxy resin impregnated paper condenser transformer /

air (ETA) bushings are used for connecting

transformers directly to air. The bushing may be

mounted vertically or horizontally or at any service

angle.

The primary insulation of ETA bushings is made from

superior grade insulating paper and foil, w ound onto a

mandrel, w hich forms partial condenser layers to control electrical stress.

The bushing f lange dimensions and design of the bushing terminals can be adapted to suit the

specif ic requirements of transformer. Corona shields may be provided if required. Draw lead

connection designs can also be provided.

Features

The ETA bushing can be provided on request

The ETA bushing range is provided for a full range of operating ratings to IEC and ANSI

Standards





Connecting f lange incorporates a test tapping for capacitance and tan delta measurement

during periodical maintenance


Type ETA (DC) Voltage range ±17.5kV~±500kV

Bushings for Direct-current transmission system

Description

Epoxy resin impregnated paper condenser Direct-

current bushings are used for DC transformers and

smoothing reactors outlet. The bushing may be mounted

vertically or horizontally or at any service angle.

Features

The ETA DC bushing can be provided on request

The ETA DC bushing range is provided for a full range

of operating ratings to IEC and ANSI Standards

Epoxy resin impregnated paper insulation. Vacuum

impregnation of the condenser core gives excellent

partial discharge performance

Oil free solid insulation provides no f ire or explosion



risk w ith the bushing

Design allow s for differential expansion across

normal operating temperature range

Connecting f lange incorporates a test tapping for

capacitance and tan delta measurement during

periodical maintenance

Non-standard CT accommodation and corona shields

can be provided on request

Maintenance-free and w ith years of operating

experience of ERIP bushing.

Type EGA Voltage Range 145kV to 550kV

Condenser bushings for direct connection between

metalclad SF6 switchgear and outdoor equipment.

Direct connection betw een metalclad SF6 sw itchgear and

outdoor equipment.

The bushings in the EGA range are suitable for connecting

outdoor equipment to SF6 metalclad sw itchgear or ducting

and may be mounted vertically, horizontally orat any angle

betw een.

The primary insulation used in this range of bushings is

condenser graded, epoxy resin impregnated paper -

ERIP. The bushings are intended as alternatives to

conventional gas-f illed porcelain. Use of ERIP provides a

compact bushing design w hich is completely free of oil. The lack of oil or pressurised gas in

the bushing greatly minimises the risk of f ire or explosion.

Used extensively for many years, ERIP has a proven reliability record in many applications and

is virtually free of partial discharges at test voltages.

The cast epoxy insulation has inherent gas tight properties and combined w ith an effective

sealing ring system provides security for the gas environment and a gas leakage rate of <10-5

torr litres per second is guaranteed. The design caters for the effect of differential expansion

across the normal operating temperature range.

The connecting f lange is impervious to gas and incorporates a self grounding test tapping for

capacitance and tan delta measurement during periodical maintenance.

The bushing f lange dimensions and design of the SF6 terminal can be adapted to

suit the specif ic requirements of the SF6 equipment. The design of the outdoor

terminal can also be adjusted to suit connections to the outdoor equipment or overhead lines.

Type EAA Voltage Range 72.5kV to 252kV

Epoxy resin impregnated paper condenser wall.

bushings

Description

The epoxy resin impregnated paper range provides the very

highest standard in bushing technology. Every product is

impulse tested as a routine so you can be assured of high

reliability and a low cost. With over 30 years experience in

the f ield of oil free bushing applications our engineers can

support all your through life needs.

The w all bushing can be provided on request

The w all bushing range is provided for a full range of

operating ratings to IECand ANSI Standards

Epoxy resin impregnated paper insulation. Vacuum

impregnation of the condenser core gives excellent partial

discharge performance

Oil free solid insulation provides no f ire or explosion risk

w ith the bushing

Design allow s for differential expansion across normal

operating temperature range

Connecting f lange incorporates a self grounding test

tapping for through lifecapacitance and tan delta

measurement

Non-standard CT accommodation can be provided on

request

© Siemens AG 2014

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