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Transformer
GOE(2)
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80 pages
Manual
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ABB
Power
Grids
Sweden
AB,
Components
SE-771
80
Ludvika,
Sweden
www.abb.com/transformercomponents
©
Copyright
2020
ABB,
All
rights
reserved.
Specifications
subject
to
change
without
notice.
1ZSC000563-ACF
EN,
REV.
A,
2020-06-25
79
Table of Contents
Main Page
Table of Contents
3
Safety
5
Levels of Safety Risks
5
Hazardous Working Situations
6
Safety Precautions
6
Competence Level
6
Product Description
7
Design
7
Technical Specification
11
General Specifications
11
Mechanical Loading
11
Delivery
13
Incoming Inspection
13
Transportation
13
Storage
13
Lifting
14
Lifting the Transport Box
14
Lifting the Bushing out of the Transport Box
15
Installation
17
Tools
17
Consumables
17
Preparations
18
Installation of Lifting Tools
18
Lifting the Bushing for Installation on the Transformer
20
Installation with Draw Lead
21
Installation with Draw Rod at Transformer Factory
25
Removal of the Lower Draw Rod with Bottom Contact from the Bushing
25
Installation of the Small Bottom Contact in the Transformer
29
Installation of the Large Bottom Contact in the Transformer
30
Installation of the Bushing on the Transformer
32
Installation with Draw Rod at Site
35
Preparations at Site
35
Installation of the Bushing on the Transformer at Site
38
Hydraulic Tightening of the Draw-Rod Nut
42
Manual Tightening of the Draw-Rod Nut
45
Minimum Oil-Level in Transformer
46
Installation of the Outer Terminal
46
Grounding of the Bushing Flange
49
Commissioning
51
Waiting Time before Energization
51
Recommended Test before Energization
52
Overview
52
Tightness Test between Transformer and Bushing Flange
52
Tightness Test of Bushing Outer Terminal
52
Measurement of Capacitance and Dissipation Factor
53
Measurement of Through-Resistance
56
Maintenance
57
Recommended Maintenance
57
Checking the Oil-Level
59
Taking Oil Samples
60
Re-Packing
63
Removal of the Bushing from the Transformer, Draw Rod
63
Re-Packing of the Bushing
67
Spare Parts
69
Summary
69
Special Tools
70
Disposal and Environmental Information
73
Overview
73
Disposal and Recycling
73
References
75
Summary
75
Appendix
77
Measurement Record
77
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