ABB GSBK Series - Default Chapter; Table of Contents

Installation and maintenance guide
1ZSC000563-AAB EN, REV. 6, 2019-09-12
3
Contents
1 Safety 5
1.1 Levels of safety risks ................................................................................................................................................................... 5
1.2 Hazardous working situations ..................................................................................................................................................... 6
1.3 Safety precautions....................................................................................................................................................................... 6
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2 Product description 7
2.1 Design ......................................................................................................................................................................................... 7
2.2 Transformer testing ..................................................................................................................................................................... 10
2.3 Technical specifications............................................................................................................................................................... 11
2.3.1 General specifications ............................................................................................................................................... 11
2.3.2 Mechanical loading.................................................................................................................................................... 12
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3 Delivery 15
3.1 Incoming inspection..................................................................................................................................................................... 15
3.2 Transportation ............................................................................................................................................................................. 15
3.3 Storage........................................................................................................................................................................................ 15
3.4 Lifting........................................................................................................................................................................................... 16
3.4.1 Lifting the transport box............................................................................................................................................. 16
3.4.2 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 Installation with fixed bottom contact........................................................................................................................................... 20
4.3.1 Installation of lifting tools ........................................................................................................................................... 20
4.3.2 Installation with fixed bottom contact......................................................................................................................... 22
4.4 Preparations with draw rod.......................................................................................................................................................... 27
4.4.1 Removal of the outer terminal ................................................................................................................................... 27
4.4.2 Removal of the lower draw rod with bottom contact from the bushing ..................................................................... 28
4.4.3 Installation of the large bottom contact in the transformer ........................................................................................ 30
4.4.4 Lifting the bushing for installation on the transformer................................................................................................ 32
4.5 Installation with draw rod............................................................................................................................................................. 33
4.5.1 Installation of the bushing on the transformer ........................................................................................................... 33
4.5.2 Manual tightening of the draw-rod nut....................................................................................................................... 36
4.5.3 Hydraulic tightening of the draw-rod nut.................................................................................................................... 38
4.6 Oil-filling....................................................................................................................................................................................... 39
4.7 Installation of the outer terminal .................................................................................................................................................. 40
4.8 Grounding of the bushing flange ................................................................................................................................................. 44
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5 Commissioning 47
5.1 Waiting time before energization .................................................................................................................................................47
5.2 Recommended tests before energization.................................................................................................................................... 47
5.2.1 Overview ................................................................................................................................................................... 47
5.2.2 Tightness test between transformer and bushing flange........................................................................................... 47
5.2.3 Measurement of capacitance and dissipation factor ................................................................................................. 48
5.2.4 Measurement of through-resistance.......................................................................................................................... 51