Table Of Contents - GE PHI 530.1425.2500 Operating And Maintenance Instructions Manual

LIST OF CONTENTS
1 Introduction ................................................................................................................................ 3
2 Safety ........................................................................................................................................ 3
2.1 Safety prescriptions and operative information.................................................................... 4
3 Transport and storage conditions ............................................................................................... 6
3.1 Transport conditions ........................................................................................................... 6
3.2 Lifting conditions ................................................................................................................. 7
3.3 Storage conditions .............................................................................................................. 7
4 Technical characteristics ............................................................................................................ 8
5 Bushing preparation ................................................................................................................... 9
5.1 Bushing unpacking ........................................................................................................... 10
5.2 Bushing controls activities at the arrival ............................................................................ 11
5.3 Tools and equipment ........................................................................................................ 12
5.4 Lifting procedure ............................................................................................................... 14
5.4.1 Lifting tools installation ............................................................................................... 14
5.5 Bushing installation on the transformer ............................................................................. 15
6 Bushing oil characteristics and accessories ............................................................................. 17
6.1 Oil pressure vs average temperature ................................................................................ 18
6.2 Oil pressure gauge ........................................................................................................... 18
6.3 PHI Bushing filtering & bypass valves ............................................................................... 19
7 Transformer turret arrangement and oil parameters ................................................................. 21
8 Gas SF6 characteristics and gas filling instructions.................................................................. 24
8.1 Gas first filling operation and control of alarm and tripping signals .................................... 25
8.2 Gas refilling during the bushing normal operation ............................................................. 25
8.3 Gas characteristics before the energization ...................................................................... 26
9 Procedure for bushing gas compartment decontamination ....................................................... 26
9.1 Procedure for bushings equipped with the gas filling station ............................................. 26
9.2 Procedure for bushings not equipped with the gas filling station ....................................... 27
10 Gas density monitor ............................................................................................................. 27
11 Power factor tap ................................................................................................................... 28
12 Voltage divider unit ............................................................................................................... 29
13 Composite insulators maintenance ....................................................................................... 30
14 General maintenance plan ................................................................................................... 32
15 Disposal at the end of life ..................................................................................................... 34
Appendix 1 - Bushing outline drawing ............................................................................................ 36
Appendix 2 - Electrical scheme ...................................................................................................... 38
Appendix 3 - Lifting tools ................................................................................................................ 52
Appendix 4 - Gas density monitor Electronsystem ......................................................................... 60
Appendix 5 - Oil pressure gauge .................................................................................................... 65
Appendix 6 - Composite insulators maintenance and repairing ....................................................... 66
Appendix 7 - Bushing installation check list .................................................................................... 67
Appendix 8 - Gas filling check list ................................................................................................... 70
HVDC TRANSFORMER BUSHINGS
PHI 530.1425.2500
PHI 265.850.1500
Kepco project
IS 2664 GB
Page 2 of 70