Installation and maintenance guide
1ZSC000563-AAB EN, REV. 6, 2019-09-12
3
Contents
Levels of safety risks ................................................................................................................................................................... 5
Hazardous working situations ..................................................................................................................................................... 6
Safety precautions....................................................................................................................................................................... 6
Design ......................................................................................................................................................................................... 7
Transformer testing ..................................................................................................................................................................... 10
Technical specifications............................................................................................................................................................... 11
2.3.1
General specifications ............................................................................................................................................... 11
Mechanical loading.................................................................................................................................................... 12
Incoming inspection..................................................................................................................................................................... 15
Transportation ............................................................................................................................................................................. 15
Storage........................................................................................................................................................................................ 15
Lifting........................................................................................................................................................................................... 16
3.4.1
Lifting the transport box............................................................................................................................................. 16
Lifting the bushing out of the transport box ............................................................................................................... 17
Tools ............................................................................................................................................................................................ 19
Consumables .............................................................................................................................................................................. 19
Installation with fixed bottom contact........................................................................................................................................... 20
4.3.1
Installation of lifting tools ........................................................................................................................................... 20
Installation with fixed bottom contact......................................................................................................................... 22
Preparations with draw rod.......................................................................................................................................................... 27
4.4.1
Removal of the outer terminal ................................................................................................................................... 27
Removal of the lower draw rod with bottom contact from the bushing ..................................................................... 28
Installation of the large bottom contact in the transformer ........................................................................................ 30
Lifting the bushing for installation on the transformer................................................................................................ 32
Installation with draw rod............................................................................................................................................................. 33
4.5.1
Installation of the bushing on the transformer ........................................................................................................... 33
Manual tightening of the draw-rod nut....................................................................................................................... 36
Hydraulic tightening of the draw-rod nut.................................................................................................................... 38
Oil-filling....................................................................................................................................................................................... 39
Installation of the outer terminal .................................................................................................................................................. 40
Grounding of the bushing flange ................................................................................................................................................. 44
Waiting time before energization ................................................................................................................................................. 47
Recommended tests before energization.................................................................................................................................... 47
5.2.1
Overview ................................................................................................................................................................... 47
Tightness test between transformer and bushing flange........................................................................................... 47
Measurement of capacitance and dissipation factor ................................................................................................. 48
Measurement of through-resistance.......................................................................................................................... 51
Содержание GSBK 170
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