Installation and maintenance guide
1ZSC000563-AAX EN, REV. A, 2019-03-21
3
Contents
1 Safety 5
1.1 Levels of safety risks ................................................................................................................................................................... 5
1.2 Hazardous working situations ..................................................................................................................................................... 6
1.3 Safety precautions....................................................................................................................................................................... 6
2 Product description 7
2.1 Design ......................................................................................................................................................................................... 7
2.2 Technical specifications............................................................................................................................................................... 11
2.2.1 General specifications ............................................................................................................................................... 11
2.2.2 Mechanical loading.................................................................................................................................................... 11
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
4 Installation 17
4.1 Tools ............................................................................................................................................................................................ 17
4.2 Consumables .............................................................................................................................................................................. 17
4.3 General preparations................................................................................................................................................................... 17
4.3.1 Preparations overview............................................................................................................................................... 17
4.3.2 Removing transport container and outer terminal ..................................................................................................... 18
4.3.3 Lifting type GSC 200/300/300E/400.......................................................................................................................... 19
4.3.4 Lifting type GSC 450S/450E/500/500E ..................................................................................................................... 21
4.4 Installation with draw rod at the transformer factory.................................................................................................................... 23
4.5 Installation with draw rod at site .................................................................................................................................................. 29
4.6 Installation of the outer terminal .................................................................................................................................................. 34
4.7 Grounding of the bushing flange ................................................................................................................................................. 37
4.8 Flashover distance ...................................................................................................................................................................... 39
5 Commissioning 41
5.1 Waiting time before energization ................................................................................................................................................. 41
5.2 Recommended tests before energization.................................................................................................................................... 41
5.2.1 Overview ................................................................................................................................................................... 41
5.2.2 Tightness test between transformer and bushing flange........................................................................................... 41
5.2.3 Tightness test of bushing outer terminal.................................................................................................................... 42
5.2.4 Measurement of capacitance and dissipation factor ................................................................................................. 42
5.2.5 Measurement of through-resistance.......................................................................................................................... 44
6 Maintenance 47
6.1 Recommended maintenance ...................................................................................................................................................... 47
7 Re-packing 49
7.1 Re-packing of the bushing........................................................................................................................................................... 49
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