ABB GOE 2600 User manual

1ZSC000563-AAF EN, REV. 4, 2021-06-23
Transformer bushing, type GOE 2600
Installation and commissioning guide

The information contained in this document may be subject to change without prior warning and should not be considered
as binding on Hitachi ABB Power Grids’s behalf. Hitachi ABB Power Grids accepts no liability for any errors that may
appear in this document. Hitachi ABB Power Grids is not liable for any damage resulting from the incorrect interpretation
of this document. This document, or parts thereof, may not be reproduced or copied without Hitachi ABB Power Grids’s
consent. It may not be distributed to others or used by unauthorized parties. Any breaches to the above will be penalized
with the support of applicable laws.

Installation and commissioning guide
1ZSC000563-AAF EN, REV. 4, 2021-06-23
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Contents
1 Safety 5
1.1 Levels of safety risks ................................................................................................................................................................... 5
1.2 Hazardous working situations ..................................................................................................................................................... 6
1.3 Safety precautions....................................................................................................................................................................... 6
1.4 Competence level........................................................................................................................................................................ 6
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2 Product description 7
2.1 Design ......................................................................................................................................................................................... 7
2.2 Technical specifications............................................................................................................................................................... 10
2.2.1 General specifications ............................................................................................................................................... 10
2.2.2 Mechanical loading.................................................................................................................................................... 11
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3 Delivery 13
3.1 Incoming inspection..................................................................................................................................................................... 13
3.2 Transportation ............................................................................................................................................................................. 13
3.3 Storage........................................................................................................................................................................................ 13
3.4 Lifting........................................................................................................................................................................................... 14
3.4.1 Lifting the transport box............................................................................................................................................. 14
3.4.2 Lifting the bushing out of the transport box ............................................................................................................... 15
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4 Installation 19
4.1 Tools ............................................................................................................................................................................................ 19
4.2 Consumables .............................................................................................................................................................................. 19
4.3 Preparations ................................................................................................................................................................................ 20
4.3.1 Installation of lifting tools ........................................................................................................................................... 20
4.3.2 Lifting the bushing for installation on the transformer................................................................................................ 22
4.4 Installation at the transformer factory .......................................................................................................................................... 24
4.4.1 Removal of the lower draw rod with bottom contact from the bushing ..................................................................... 24
4.4.2 Installation of the small bottom contact (N1=4) in the transformer ............................................................................ 27
4.4.3 Installation of the large bottom contact (N1=6) in the transformer ............................................................................ 29
4.4.4 Installation of the bushing on the transformer ........................................................................................................... 31
4.4.5 Installation of the bushing with the fixed bottom contact ........................................................................................... 34
4.5 Installation at site......................................................................................................................................................................... 36
4.5.1 Preparations at site ................................................................................................................................................... 36
4.5.2 Installation of the bushing on the transformer at site................................................................................................. 39
4.5.3 Installation of the bushing with the fixed bottom contact ........................................................................................... 34
4.6 Hydraulic tightening of the draw-rod nut...................................................................................................................................... 45
4.7 Minimum oil-level in transformer ................................................................................................................................................. 49
4.8 Installation of the outer terminal .................................................................................................................................................. 49
4.9 Grounding of the bushing flange ................................................................................................................................................. 52

4Installation and commissioning guide
1ZSC000563-AAF EN, REV. 4, 2021-06-23
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5 Commissioning 53
5.1 Waiting time before energization .................................................................................................................................................53
5.2 Recommended test before energization .....................................................................................................................................54
5.2.1 Overview ................................................................................................................................................................... 54
5.2.2 Tightness test between transformer and bushing flange........................................................................................... 54
5.2.3 Tightness test of bushing outer terminal.................................................................................................................... 54
5.2.4 Measurement of capacitance and dissipation factor ................................................................................................. 55
5.2.5 Measurement of through-resistance.......................................................................................................................... 58
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6 Maintenance 59
6.1 Recommended maintenance ...................................................................................................................................................... 59
6.2 Checking the oil-level .................................................................................................................................................................. 61
6.3 Taking oil samples ....................................................................................................................................................................... 62
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7 Re-packing 65
7.1 Removal of the bushing from the transformer, draw rod ............................................................................................................. 65
7.2 Removal of the bushing from the transformer, fixed bottom contact ...........................................................................................68
7.3 Re-packing of the bushing........................................................................................................................................................... 71
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8 Spare parts and special tools 73
8.1 Summary ..................................................................................................................................................................................... 73
8.2 Spare parts .................................................................................................................................................................................. 73
8.3 Special tools ................................................................................................................................................................................ 75
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9 Disposal and environmental information 79
9.1 Overview ..................................................................................................................................................................................... 79
9.2 Disposal and recycling ................................................................................................................................................................ 79
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10 References 81
10.1 Summary ..................................................................................................................................................................................... 81
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11 Appendix 83
11.1 Measurement record ................................................................................................................................................................... 83

Installation and commissioning guide
1ZSC000563-AAF EN, REV. 4, 2021-06-23
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1 Safety
1.1 Levels of safety risks
Throughout the manual, various types of safety risks are indicated. The most serious level on this scale
provides a warning about serious personal injury or possible death, or major damage to a product, if the
instructions are not observed.
Symbols and their meanings
The following describes the symbols that appear in the manual, along with their meaning.
DANGER!
The yellow, filled warning triangle warns that an accident will occur if the instructions are not
complied with and that it will result in serious personal injury or death and/or major damage to the
product.
It is used, for example, to warn of such dangers as: contact with high voltage, explosion or fire
risk, risk for toxic gases, risk of crushing, impacts, falls from high places, etc.
CAUTION!
The round warning symbol warns that an accident could occur if the instructions are not observed,
and that this could result in personal injury and/or damage to the product.
It is also used to warn of risks that entail burns, eye or skin injuries, impaired hearing, crushing or
slipping injuries, tripping, impacts, falls from high places, etc.
In addition, it is used to warn of functional requirements when assembling or removing equipment
where there is a risk of damage to the product or downtime.
NOTE!
The comment symbol identifies important information and conditions. Also used to indicate any
danger that could lead to property damage.
Torque
The torque symbol indicates tightening torque.

6Installation and commissioning guide
1ZSC000563-AAF EN, REV. 4, 2021-06-23
1.2 Hazardous working situations
Hazard Action
Working close to high voltage. Disconnect all plant power. Ground all objects at the workplace.
If work must be done close to live plant components, make sure that
the safety distance is in compliance with the applicable safety
regulations.
Working on ladders and platforms. Work must be done in accordance with the applicable safety
regulations.
Do not use ladders or platforms in poor weather conditions.
Working with heavy objects. Do not walk under lifted objects.
Make sure that heavy objects are stable before starting work.
1.3 Safety precautions
Precaution Action
Transformer oil Collect used transformer oil in drums.
Transformer oil is dangerous. Fumes from hot oil can cause irritation
to the respiratory organs and the eyes. Long and repeated contact
with transformer oil can cause damage to your skin.
Waste and cleaning up Clean up liquid waste with an adsorbent. Treat waste as hazardous
to the environment.
Fire Extinguish fires with powder, foam or carbon dioxide.
1.4 Competence level
Installation of the bushing should only be performed by authorized personnel.
CAUTION!
Incorrect installation can lead to catastrophic failure of the transformer.

Installation and commissioning guide
1ZSC000563-AAF EN, REV. 4, 2021-06-23
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2 Product description
2.1 Design
Overview
The GOE 2600 is a capacitance graded oil impregnated paper bushing made for immersed oil/air service.
General schematics
G006945
9 Oil plug
26 Oil-level gauge
36 Bottom contact
51 Oil sampling valve ½”
65 Mounting flange
68 Top housing
69 Porcelain insulator, air side
70 Test tap
71 Extension for current transformer
72 Porcelain insulator, oil side
74 Lifting eye Ø 70 mm

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Terminal system
The bushing can be configured with one of two terminal systems: the fixed bottom contact system, or the
draw-rod system.
Terminal system Option
Draw-rod system Small bottom contact (N1=4)
Large bottom contact (N1=6)
Fixed bottom contact -
Draw-rod system
The draw rod can be configured with an optional joint (53) to fit transformers with short bushing turrets.
The bottom-contact joint (56) is locked with threadlocking fluid as standard.
The bushing has draw rod with two upper joints (52), they are always locked with threadlocking fluid. All
joints must be locked with threadlocking fluid when the bushing is in operation at site.
G006981
39 Lower joint (at flange level).
52 Upper joint.
53 Additional joint (option).
54 Thread is locked with threadlocking fluid.
55 Thread is NOT locked with threadlocking fluid.*
56 Bottom-contact joint, locked with threadlocking fluid. Unlocked as option.*
* All unlocked threads must be locked with threadlocking fluid, when the bushing is installed at site.
Fixed bottom contact
The fixed bottom contact is installed when it is delivered from Hitachi ABB Power Grids.
CAUTION!
Do not remove the six fixing bolts.

Installation and commissioning guide
1ZSC000563-AAF EN, REV. 4, 2021-06-23
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G007609
36 Fixed bottom contact
Test tap
The bushing has a test tap that is connected to the outermost conductive layer of the condenser core. The test
tap is used to measure the bushing insulation by capacitance and dissipation factor. The cover connects the
outermost conductive layer to ground, and must always be installed when the bushing is energized.
The maximum one minute test voltage for this test tap is 20 kVrms. The test tap can be used as a power
source, if it is connected to an external capacitance. The operating voltage is limited to 6 kV.
CAUTION!
Do not energize the bushing without a test adapter or the cover installed. The bushing condenser
core is grounded through the cover to prevent damage to the bushing.
G006914
3 O-ring
57 Stud
58 Cover
59 Grounding spring

10 Installation and commissioning guide
1ZSC000563-AAF EN, REV. 4, 2021-06-23
Test adapter, 2769 522-C, optional equipment
The test adapter 2769 522-C is available for permanent connection to measuring circuits. Please refer to Test
adapter – Technical guide 1ZSC000563-ACS and Installation and maintenance guide 1ZSC000563-ACD.
G003049
2.2 Technical specifications
2.2.1 General specifications
Refer to the table for the standard technical specifications of the bushing. For conditions exceeding the
specifications, please contact Hitachi ABB Power Grids.
Application: Transformers
Classification: Transformer bushing
• Oil impregnated paper, capacitance graded, oil immersed.
• For outdoor use.
Ambient temperature limits: -40 °C to +40 °C, limit temperatures.
Maximum altitude of site: 1000 m
Level of rain and humidity: 1-2 mm rain/minute horizontally and vertically, according to
IEC 60060-1.
Maximum pollution level: According to the specific creepage distance, and IEC 60815.
Immersion medium: Transformer oil.
• Maximum daily mean oil temperature: +90 °C.
• Maximum temporary oil temperature, at short time
overload: +115 °C.
Oil-level in transformer: Not lower than 30 mm from the bushing flange.
Maximum pressure of medium: pg100 kPa (pg= relative to ambient pressure).
Angle of installation: Vertical
Test tap: Test tap with 8 mm male contact pin.
According to IEEE type A.
Conductor: Center-tube conductor.
Markings: Conforming to IEC.