ABB GOE Series - Default Chapter; Table of Contents

Installation and commissioning guide
2750 515-1 EN, REV. 14, 2020-06-26
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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 specification................................................................................................................................................................. 12
2.2.1  General specifications ............................................................................................................................................... 12
2.2.2  Mechanical loading.................................................................................................................................................... 12
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3  Delivery 15
3  Incoming inspection..................................................................................................................................................................... 15
3.1  Transportation ............................................................................................................................................................................. 15
3.2  Storage........................................................................................................................................................................................ 15
3.3  Lifting........................................................................................................................................................................................... 16
3.3.1  Lifting the transport box............................................................................................................................................. 16
3.3.2  Lifting the bushing out of the transport box ............................................................................................................... 17
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4  Installation 19
4.1  Tools ............................................................................................................................................................................................ 19
4.2  Consumables .............................................................................................................................................................................. 19
4.3  Preparations ................................................................................................................................................................................ 20
4.3.1  Lifting the bushing ..................................................................................................................................................... 20
4.3.2  Oil-filling of the bushing for horizontal installation ..................................................................................................... 22
4.4  Horizontal installation of the bushing on the transformer ............................................................................................................ 24
4.5  Installation with draw lead ........................................................................................................................................................... 26
4.5.1  Calculation of the length of the draw lead ................................................................................................................. 26
4.5.2  Installation with draw lead ......................................................................................................................................... 27
4.6  Installation with draw rod at transformer factory.......................................................................................................................... 32
4.6.1  Removal of the lower draw rod with bottom contact from the bushing ..................................................................... 32
4.6.2  Installation of the small bottom contact (N1=4) in the transformer ............................................................................ 35
4.6.3  Installation of the large bottom contact (N1=6) in the transformer ............................................................................ 37
4.6.4  Installation of the bushing on the transformer ........................................................................................................... 39
4.7  Installation with draw rod at site .................................................................................................................................................. 43
4.7.1  Preparations at site ................................................................................................................................................... 43
4.7.2  Installation of the bushing on the transformer at site................................................................................................. 46
4.8  Hydraulic tightening of the draw-rod nut...................................................................................................................................... 49
4.9  Manual tightening of the draw-rod nut......................................................................................................................................... 53
4.10  Minimum oil-level in transformer ................................................................................................................................................. 55
4.11  Installation of the outer terminal .................................................................................................................................................. 55
4.12  Grounding of the bushing flange ................................................................................................................................................. 58