RIP Transformer Bushing Type DTOI10/15/2009 Seite 1

Bushings

TRAVESCA® transformer bushingsFully insulated capacitive bushings for voltages up to 170kV

Company Overview

10/15/2009

Oil-Oil Bushing Type DTO25.8kV 2000A Oil-Air Bushing Type DTOI 72.5kV 800A

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TRAVESCA®

Transformer Bushings

Dry, fine graded Bushing with RIP Insulation andSilicone rubber insulator

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Why TRAVESCA® ?

In the view of the market

Movement towards silicone insulated dry transformer bushings especially in Switzerland, Germany and Austria

Increasing market volume in the field of silicone insulated transformer bushings

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Why TRAVESCA® ?

In the view of MGC Moser-Glaser AG

50 years of experience in RIP Technology and manufacturing RIP wall bushings

40 years of experience in RIP Bushings and busbars with a voltage level 123kV and higher

More than 15 years of Experience with silicone rubber insulators

Manufacturing of 72.5 kV RIP Transformer-Bushings with porcelain insulator in the 1970/80`s

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Advantages

Highest possible operational safetyLongest possible lifetimeMaintenance free operationNo oil leakage possible because of dry insulationMounting position 0…90°Weight reduction approx. 30% compared with porcelain insulated bushings

TRAVESCA® Type DTOI

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TRAVESCA® Typ DTOITechnical Data

Voltage range ≤ 170 kVNominal current ≤ 2500 ACreepage distance Insulator 31 mm/kVStandard Current Transformer space 0/300/500 mm

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TRAVESCA® – Type DTOI

800 A 1250 A 1600 A 2500 A

Conductordimension

– 35 mm 42 mm 65 mm

Type Draw lead

Conductor Conductor Conductor

Removable x x

Fixed x x

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TRAVESCA® Typ DTOI

Head Terminal

Alternatively in Aluminium, Copper or Copper silver plated available

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TRAVESCA® Typ DTOI

Test Tap

All Bushings are equipped with capacitive 2kV test tap. Used to monitor the capacitance C, partial discharge pC and the dissipation factor tan δ

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TRAVESCA® Type DTOI

Arcing horns:

On customer requirement can the DTOI bushing be equipped with arcing horns made of CrNi Steel

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TRAVESCA® oil side

Special attention was taken to the oil side of the bushing

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Dielectric Test on DTOI 123 kV

Voltage Allowed PD Measured value

1,05 x Um/√3 ≤ 5 pC 1 pC

1,5 x Um/√3 ≤ 10 pC 1 pC

Um ≤ 10 pC 1 pC

1,1 x Up 1 pC

Test value Up 230 kV Up 300 kV

Safety factor 30%

According to IEC 60137

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BIL Test DTOI 123 kVAccording to IEC 60137

Test Standard Limit Value Safety factor15+ 550 kV1- 550 kV5 abgeschnitten 633 kV14- 550 kV5 + 660 kV 20 %

U = 633 kV

µs50 %

1.2 500

U = 660 kV

µs

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Temperature Rise Test DTOI 123kV / 800A

According to IEC 60137

RatedCurrent of Bushing

800ATest

current1250A

Safetyfactor56%

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Cantilever Test DTOI 123 kV

According to IEC 60137

Norm 3150 N

Tested 3750 N

Limit Value 5000 N

Safety factor 59 %

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Wet Power frequency Test DTOI 123 kV

According to IEC 60137

Standard 230 kV 60 s

Tested 230 kV 72 s

Tested 253 kV 72 s

Safety factor > 10 %

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Temperature Test DTOI 123 kV

According to IEC 60137

Type DTOI

Step 1 -25°C Standard

Step 2 -40°C Optional

Additional temperature test down to -50°C duration 8 Std. with following leakage test on the flange with helium leakage tester

Test itemTest equipment for leakage test

Safety factor

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Special Bending testContinuous operation test to on a DTOI 123kV bushing. Simulating 30 years operation time.Total of 50000 lifting's at -30°C and +50°C. Followed by routine test and dry lightning impulse withstand test (BIL) according IEC60 137.

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Special “Cook Test”

“Cook Test“ on 145kV Bushing. 42 hours at +98°C with 1% salt solution followed by dry lightning impulse withstand test (BIL)Target: To ensure that no humidity is taken up by the direct cast silicone insulator and RIP insulating body.

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Production process

123 kV Type DTOI after impregnation process with flange

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Silicone Rubber Insulator

Manufactured at MGC, reduces delivery time Standard 31mm/kV

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123 kV Type DTOI after the casting process of the insulator

123 kV Type DTOI at MGC test laboratory during routine test according to IEC 60137 (2003-08)

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Long term storing of TRAVESCA® Transformer bushings

Sealing bolt on head of bushing

Aluminium tank with sealing flange

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Application:Type: DTOIUn: 123kVIr: 1000ADraw lead typeInsulator: Silicone Creepage distance: 31mm/kV

Project Venezuela Transformer manufacturer Starkstromgerätebau Regensburg Germany

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Application:Type: DTOIUm: 123 kVIr: 400 ADraw lead typeInsulator: Silicone Creepage distance: 31mm/kV

Utility EnBW Energie AG Stuttgart Germany Transformer Manufacturer Siemens AG Dresden

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Application

Typ: DTOIUm: 123 kV, Ir: 800 ADraw lead typeInsulator: Silicone Creepage distance: 31mm/kVFrequency 16 2/3Hz Deutsche Bahn Energie AG Transformatorhersteller ABB Oy Vaasa Finnland

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Application:Type: DTOIUm: 123 kVIr: 1250 AFixed conductor versionInsulator: Silicon Creepage distance: 31mm/kV

RWE AG Transformer manufacturer Areva Schorch Mönchengladbach , Germany

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Application:Type: DTOIUm: 123 kVIr: 400 ADraw lead typeInsulator: Silicone Creepage distance: 31mm/kVTemperatur range -45°C

Transformer manufacturer ETD TRANSFORMATORY a.s. Plzen, Czeck Republic

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Application:Type: DTOIUm: 123 kVIr: 1250 AFixed conductor versionInsulator: Silicon Creepage distance: 31mm/kV

Utility ERW Worms Transformer manufacturer Starkstromgerätebau Regensburg Germany

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MGC Moser Glaser List of Transformer Bushings Customers and Users

Transformer Manufacturers:ABB Oy Vaasa Finland Areva Schorch Mönchengladbach GermanyETD TRANSFORMATORY a.s. Czech Republic ETRA 33 SloveniaGanz Transformers HungaryPauwels Trafo Belgium N.V. Mechelen Belgium Siemens AG Dresden GermanySiemens AG Nürnberg Germany Siemens AG Linz AustriaStarkstrom-Gerätebau GmbH Regensburg Germany

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MGC Moser Glaser List of Transformer Bushings Customers and Users

Enduser / UtilitiesDB Energie AG Frankfurt GermanyEnBW Regional AG Stuttgart Germany EnBW Service GmbH Karlsruhe GermanyEon-Avacon Braunschweig Germany Hydro Exploitation Sion Switzerland JSC “Astrakhanenergo”. Russia Meralco, Manila PhilipienesNational Power Corp. PhilipienesRWE AG GermanyStadtwerke Coesfeld Germany Stadtwerke Worms Germany Statoil Norway Scottish Power Energy Networks Great BritainHärnösand Elnet AB Sweden