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Rev. 

Description 

Date 

Prepared 

Controlled 

Service 

Approval 

 

Emission 

06/02/2017 

G.Testin 

P.Cardano 

M.Campana 

Rev. Rated filling pressure value, Outline drawings & relevant 

doc.18/04/2 

18/04/2017 

G. Testin 

P. Cardano 

M. Campana 

Rev. Transport pressure gauge installation, management & 

check list 

14/03/2018 

G. Testin 

P. Cardano 

M. Campana 

 

 

 

 

 

 

IS 2664 GB 

 

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HVDC TRANSFORMER BUSHINGS 

PHI 530.1425.2500 

PHI 265.850.1500 

Kepco project 

 

 

 

OPERATING 

AND 

 

MAINTENANCE INSTRUCTIONS 

 

Summary of Contents for PHI 530.1425.2500

Page 1: ...essure gauge installation management check list 14 03 2018 G Testin P Cardano M Campana IS 2664 GB GE Energy Connections reserves all rights in this document and in the information contained therein R...

Page 2: ...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 norma...

Page 3: ...ord OBLIGATION while important operative instructions are evidenced by the word NOTE This manual must be available to the personnel responsible of the installation operation and maintenance of the bus...

Page 4: ...ngth must be 3m During this operation the workers must wear protective insulating gloves and boots and helmets with protective transparent face shield 2 1 Safety prescriptions and operative informatio...

Page 5: ...y with the standard EN 397 OBLIGATION During all activities it is mandatory to use safety gloves complying with the standard EN 388 with performance index not less than 4131 OBLIGATION During all acti...

Page 6: ...port pressure gauge see Figure 1 installed on a Dilo valve This device must be removed during the installation phase on the transformer before the bushing filling at rated pressure and it has to be re...

Page 7: ...rease the gas pressure to 0 5 bar gauge 0 150 MPa abs GE Energy Connections RPV must be informed concerning the activation of the long storage condition The periodical controls must verify the bushing...

Page 8: ...performances in case of high current ratings and harmonics presence The grading capacitor winding is 100 protected from the risk of pollution during the bushing installation on the transformer as it...

Page 9: ...Table 3 Environmental conditions 5 Bushing preparation All operators involved in components unpacking and assembly have to be careful not to damage the objects During the unpacking operation it is ne...

Page 10: ...r Inside the crate the bushing is locked at the level of the central and the top flange by locking belts and bolts Figure 4 Lid sections locking screws Figure 5 Removing the lid sections WARNING Compo...

Page 11: ...tructions 3 Oil pressure Check if the oil pressure 1 bar gauge 20 C see Figure 8 Record the pressure and the average bushing temperature In case of deviations notify the Foreman and the GE Energy Conn...

Page 12: ...ding steel rope RX38A162 01 1600 1 3 Lifting lug DN22 RX1A013 22 2000 1 4 Front plate lifting kit RX380463 02 2000 1 5 Front lifting rope Not included 1000 1 Not included 6 Bolts nut washers kit 1 set...

Page 13: ...all have the following minimum characteristics Solution with one overhead crane Single grinder crane Crane capacity 2 5 t Hoist lifting height 12m Slow hoisting speed 1 3 m min Or as an alternative N...

Page 14: ...g tools it is necessary to follow this procedure Remove the crate walls Check that the bushing pressure is set at the transport pressure level Install the Lifting Plates Item 1 on the bushing flange F...

Page 15: ...stallation quote indicated in the bushing Outline drawing see Figure 7 Bushing PHI 265 Bushing PHI 530 Figure 7 Bushings bottom side and interface quote with the transformer barrier shield WARNING Bef...

Page 16: ...insertion inside the turret By continuously controlling that the turret and the bushings are aligned gradually insert the bushing inside the transformer turret NOTE During this operation it is mandat...

Page 17: ...tion at the factory production Concerning the ISO 11218 solid contamination limits classes next Table 9 summarizes the quantities and the size limits for each class Classes Maximum Contamination Limit...

Page 18: ...acteristic of the selected expansion vessels the next Figure 8 shows the curves Pressure vs Average oil temperature for the two PHI bushings Figure 8 Oil pressure vs average oil temperature This curve...

Page 19: ...e is installed on a ball type valve for easy replacement in case on need and all electrical cables are wired in the junction box provided with DIN type terminal blocks see Appendix 2 Additional inform...

Page 20: ...the side of each filter valve block These connections are protected by a removable cap see Figure 11 By pass valves are placed in both type of blocks and are necessary to ensure the proper oil circul...

Page 21: ...of the turret oil processing procedure Turret design and oil processing procedure are under the responsibility of the Transformer Manufacturer and the concepts illustrated in this part are not mandato...

Page 22: ...edure includes the following steps Vacuum in the turret o Apply vacuum to the turret via the transformer oil conservator and the Buchholtz relay pipe o Vacuum level 0 1 kPa 1 mbar o Vacuum time at vac...

Page 23: ...treatment machine to the valves B and C o Apply vacuum to the turret via the Buchholtz relay pipe o Vacuum level in the turret 0 1 kPa 1 mbar o Vacuum time vacuum level 3 h o Fill the turret from val...

Page 24: ...st be checked and the data must be reported in the Gas filling check list see Appendix 8 The gas filling must be performed with an equipment that prevents dispersion of the SF6 gas in the atmosphere A...

Page 25: ...he pressure independently from the effective gas temperature Whatever the temperature of the gas the instrument indicates a pressure equivalent to a gas average temperature of 20 C This condition is d...

Page 26: ...es SF6 transport pressure below the specified limits and or with gas dew point 30 C at atmospheric pressure Evidence of gas dew point 20 C at rated filling pressure before the energization Evidence of...

Page 27: ...located at the bushing flange 10 Gas density monitor The bushing is equipped with two gas density monitors manufactured by Electronsystem The two instruments are different as one is a normal gas dens...

Page 28: ...n box provided with DIN type terminal blocks for easy assembly and maintenance see Appendix 2 Additional information about the gas density monitor devices are illustrated in Appendix 4 NOTE Due to the...

Page 29: ...ough the PF tap The main characteristics are Parameter Description Value V1L Rated line to line voltage 220 kV V1Lmax Maximum line to line voltage 230 kV V2L Rated line to line secondary voltage at V1...

Page 30: ...er Cleaning of the composite insulator is necessary only in case of heavy contamination Due to the installation on the bushing inside the valve hall cleaning by washing is not possible In this case cl...

Page 31: ...of evidence of incipient erosion tracking plan an immediate cleaning action UV camera and infrared examination Scan all the surface of the composite insulators with an UV camera to identify possible...

Page 32: ...ent terminals When plant is off Check for evidence of hot spots Check the terminals and tighten the connecting bolts to the bushing flange Check the cable clamps and the bolting to the terminal Antici...

Page 33: ...tive and correct operation of the alarms tripping signal chain from the instruments to the substation systems Bushing overall gas leakage 5 years Check with SF6 leak meter device all the flanges joint...

Page 34: ...opper silvered Dismount and recycle Toroids Aluminum Dismount and recycle Internal electrostatic shields Aluminum Dismount and recycle SF6 and oil side cones Fibreglass Dismount and dispose Aluminum R...

Page 35: ...ppendices Appendix 1 Bushing outline drawing Appendix 2 Electrical scheme Appendix 3 Lifting tools Appendix 4 Gas density monitor Electronsystem Appendix 5 Oil pressure gauge Appendix 6 Composite insu...

Page 36: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 36 of 70 PHI 265kV 1500A Appendix 1 Bushing outline drawing...

Page 37: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 37 of 70 PHI 530kV 2500A...

Page 38: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 38 of 70 PHI 265kV 1500A Appendix 2 Electrical scheme...

Page 39: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 39 of 70 PHI 265kV 1500A...

Page 40: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 40 of 70 PHI 265kV 1500A...

Page 41: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 41 of 70 PHI 265kV 1500A...

Page 42: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 42 of 70 PHI 265kV 1500A...

Page 43: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 43 of 70 PHI 265kV 1500A...

Page 44: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 44 of 70 PHI 265kV 1500A...

Page 45: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 45 of 70 PHI 530kV 2500A...

Page 46: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 46 of 70 PHI 530kV 2500A...

Page 47: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 47 of 70 PHI 530kV 2500A...

Page 48: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 48 of 70 PHI 530kV 2500A...

Page 49: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 49 of 70 PHI 530kV 2500A...

Page 50: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 50 of 70 PHI 530kV 2500A...

Page 51: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 51 of 70 PHI 530kV 2500A...

Page 52: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 52 of 70 PHI 265kV 1500A Appendix 3 Lifting tools...

Page 53: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 53 of 70 PHI 265kV 1500A...

Page 54: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 54 of 70 PHI 265kV 1500A...

Page 55: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 55 of 70 PHI 265kV 1500A...

Page 56: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 56 of 70 PHI 530kV 2500A...

Page 57: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 57 of 70 PHI 530kV 2500A...

Page 58: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 58 of 70 PHI 530kV 2500A...

Page 59: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 59 of 70 PHI 530kV 2500A...

Page 60: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 60 of 70 Appendix 4 Gas density monitor Electronsystem...

Page 61: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 61 of 70...

Page 62: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 62 of 70...

Page 63: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 63 of 70...

Page 64: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 64 of 70...

Page 65: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 65 of 70 Appendix 5 Oil pressure gauge...

Page 66: ...HVDC TRANSFORMER BUSHINGS PHI 530 1425 2500 PHI 265 850 1500 Kepco project IS 2664 GB Page 66 of 70 Appendix 6 Composite insulators maintenance and repairing...

Page 67: ...ording At oil gauge _________ bar gauge tavg _________ C In case of pressure not in line wth the diagram pressure temperature Figure 8 or evidence of oil leakages contact GE Energy Connections RPV Che...

Page 68: ...rt the bushing into the turret Check that the cone will not interfere with the metal parts of the turret and the CT and that the oil side cone is not damaged No damages on the cone are allowed In case...

Page 69: ...ates 0 55 MPa abs Check the remote reading of the gas pressure sensor Gas pressure B3 B4 ______ _____MPa abs Remote pressure ________________MPa bs Increase the gas pressure until Alarm 1 contact oper...

Page 70: ...icates ppm by weight from measurements Bottle S N Bushing S N SF6 content by weight Air CF4 H2O Mineral oil Total acidity expressed in HF Hydrolizable fluorides in terms of HF Dew point at amospheric...

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