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Installation and commissioning guide
1ZSC000563-ACF EN, REV. A, 2020-06-25
5 Commissioning 51
5.1 Waiting time before energization ................................................................................................................................................. 51
5.2 Recommended test before energization ..................................................................................................................................... 52
5.2.1 Overview ................................................................................................................................................................... 52
5.2.2 Tightness test between transformer and bushing flange........................................................................................... 52
5.2.3 Tightness test of bushing outer terminal.................................................................................................................... 52
5.2.4 Measurement of capacitance and dissipation factor ................................................................................................. 53
5.2.5 Measurement of through-resistance.......................................................................................................................... 56
6 Maintenance 57
6.1 Recommended maintenance ...................................................................................................................................................... 57
6.2 Checking the oil-level .................................................................................................................................................................. 59
6.3 Taking oil samples ....................................................................................................................................................................... 60
7 Re-packing 63
7.1 Removal of the bushing from the transformer, draw rod ............................................................................................................. 63
7.2 Re-packing of the bushing........................................................................................................................................................... 67
8 Spare parts 69
8.1 Summary ..................................................................................................................................................................................... 69
8 Spare parts.................................................................................................................................................................................. 69
8 Special tools ................................................................................................................................................................................ 70
9 Disposal and environmental information 73
9.1 Overview ..................................................................................................................................................................................... 73
9.2 Disposal and recycling ................................................................................................................................................................ 73
10 References 75
10 Summary ..................................................................................................................................................................................... 75
11 Appendix 77
11.1 Measurement record ................................................................................................................................................................... 77
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