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HVDC TRANSFORMER BUSHINGS
PHI 530.1425.2500
PHI 265.850.1500
Kepco project
IS 2664 GB
Page
2
of
70
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
Содержание PHI 265.850.1500
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