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GE PHI 530.1425.2500 Operating And Maintenance Instructions Manual

Hvdc transformer bushings
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HVDC TRANSFORMER BUSHINGS
Rev.
Description
0
Rev. Rated filling pressure value, Outline drawings & relevant
1
doc.18/04/2
Rev. Transport pressure gauge installation, management &
2
PHI 530.1425.2500
PHI 265.850.1500
Kepco project
OPERATING
MAINTENANCE INSTRUCTIONS
Emission
check list
AND
Date
Prepared
06/02/2017
G.Testin
18/04/2017
G. Testin
14/03/2018
G. Testin
Service
Controlled
Approval
P.Cardano
M.Campana
P. Cardano
M. Campana
P. Cardano
M. Campana
IS 2664 GB

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  • Page 1 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 PHI 265.850.1500 Kepco project OPERATING MAINTENANCE INSTRUCTIONS Service Rev. Description Date Prepared Controlled Approval Emission 06/02/2017 G.Testin P.Cardano M.Campana Rev. Rated filling pressure value, Outline drawings & relevant 18/04/2017 G. Testin P. Cardano M. Campana doc.18/04/2...

  • Page 2: Table Of Contents

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 2 of 70 Kepco project LIST OF CONTENTS Introduction ..........................3 Safety ............................3 Safety prescriptions and operative information..............4 Transport and storage conditions ....................6 Transport conditions ......................6 Lifting conditions .........................

  • Page 3: Introduction

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 3 of 70 Kepco project Introduction These instructions are applicable to the hybrid type HVDC transformer bushings of the PHI series and provide all information relevant to: • Safety aspects.

  • Page 4: Safety Prescriptions And Operative Information

    Safety prescriptions and operative information The following notes are mandatory for personnel involved in transformer bushing installation. All problems detected during the bushing installation must be reported to the Foreman and to GE Energy Connections RPV Supervisor. WARNING: The PHI bushing is a gas pressurized device. Operations on valves, pressure gauges, pipes, protective devices must be performed by qualified operators, with the proper equipment.
  • Page 5 The composite insulators sheds are made by silicone that can be mechanically damaged if not properly handled. Protect the insulators with clean plastic foils during the bushing installation and immediately report to Foreman and to GE Energy Connections RPV Supervisor any event which could have caused a damage of the composite insulators.

  • Page 6: Transport And Storage Conditions

    GE Energy Connections RPV, suitable to cover completely the crate. Sea transportation on the ship main deck is allowed providing the above mentioned additional protection.

  • Page 7: Lifting Conditions

    In this case, it is also recommended to increase 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 conditions, the gas pressure and its dew point and the overall status of the electric instruments, the accessories and tools.

  • Page 8: Technical Characteristics

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 8 of 70 Kepco project Technical characteristics PHI bushings are based on the hybrid technology. This means that the bushing is based on two different insulation technologies: The first, based on an Oil Impregnated Paper (OIP in the document) grading capacitor, realizes the interface with the transformer.

  • Page 9: 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 necessary to check that all components supplied by GE Energy Connections RPV are available and not damaged during the transportation.

  • Page 10: Bushing Unpacking

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 10 of 70 Kepco project Bushing unpacking The crate is provided with a lid made in sections. Each section is provided with four lifting eyebolts placed at the four corners.

  • Page 11: Bushing Controls Activities At The Arrival

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 11 of 70 Kepco project Bushing controls activities at the arrival Item Control Description Actions on problems Crate inspection Check for evidence of shocks on the crate Take pictures •...

  • Page 12: Tools And Equipment

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 12 of 70 Kepco project 5.3 Tools and equipment The next Table 5 and Table 6 show the main parts of the lifting tool for the PHI 265 and the PHI 530 bushings.
  • Page 13 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 13 of 70 Kepco project Bolts and nuts of the lifting tools must be tightened at torque values listed in the following Table 7. Tightening Screw / nut Torque...

  • Page 14: Lifting Procedure

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 14 of 70 Kepco project 5.4 Lifting procedure This paragraph refers to the bushing removal from the transport crate. All references are to the tool lists in Table 5 for the PHI 265 and Table 6 for the PHI 530 and to the drawings RX380466-01 and RX380466-02 in Appendix WARNING: Before proceeding with the installation of the bushing on the transformer, it is necessary that the bushing gas pressure is set at the transport value (0.25 bar gauge, 0.125MPa abs).

  • Page 15: Bushing Installation On The Transformer

    5.5 Bushing installation on the transformer The complete installation operation must be performed in presence of the transformer Manufacturer Foreman and GE Energy Connections RPV Supervisor. The transformer turret must be designed to withstand vacuum and provided with proper filtering valves to allow the oil filling under vacuum and the oil recirculation inside the barrier system After the bushing installation, the turret final oil filling must be done under vacuum.
  • Page 16 • transformer side of the bushing flange angle by a Quadranfix inclinometer or by an electronic inclination gauge (not supplied by GE RPV). Control with the same instrument the • effective inclination angle of the transformer turret flange and adjust...

  • Page 17: Bushing Oil Characteristics And Accessories

    The PHI bushings are filled Nynas Nytro 4000 A mineral oil. The same type of oil must be used in case of re- filling or oil reprocessing. At the end of the drying and impregnation process in GE factory, the bushing oil parameters are in accordance with the data listed in the following Table 8.

  • Page 18: Oil Pressure Vs Average Temperature

    Figure 8 – Oil pressure vs. average oil temperature This curve is used in GE Factory to set the proper oil pressure at the end of the bushing production process and it is also useful to check the bushing status during the operation by controlling the oil pressure on the built-in oil pressure gauge, see next Paragraph 6.2.

  • Page 19: Phi Bushing Filtering & Bypass Valves

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 19 of 70 Kepco project Figure 9 – Oil pressure gauge Each instrument is equipped with 4 Normally Open micro-switches that provide alarm / tripping signals. Table 10 shows the micro switches purpose and the pressure set up.
  • Page 20 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 20 of 70 Kepco project The valve blocks can be of two types, the type named Filtering valve block, that includes three different valves (see Figure 10 a) and the type named By-pass valve block, that includes the by-pass valve only (see Figure 10...

  • Page 21: Transformer Turret Arrangement And Oil Parameters

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 21 of 70 Kepco project Filtering valves ¾” BSP connections By-pass valve Protective caps Metal lid Metal lid By-pass valve Filtering valves block By-pass valve block Figure 11 – PHI bushing valves and connections arrangement The metal lids are provided with internal protrusions that prevent the flange closure in case that the valves are not in the correct position.
  • Page 22 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 22 of 70 Kepco project Next Figure 13 shows an example of turret arrangement during the treatment operation and relevant oil flows that can be realized by this arrangement.
  • Page 23 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 23 of 70 Kepco project Minimum impregnation time under vacuum: ≥ 12 h. Recirculation of the internal side of the pressboard barriers from the DN25 internal pipe • Oil treatment plant connected to point ‘A’ to bottom valve ‘B’.

  • Page 24: Gas Sf6 Characteristics And Gas Filling Instructions

    Table 14 - Characteristics of new SF6 gas according GE Energy Connections RPV and premium Supplier The minimum requirement is that the characteristics have to be in accordance with the data listed in the GE Energy Connections RPV limits column.

  • Page 25: Gas First Filling Operation And Control Of Alarm And Tripping Signals

    • and Alarm 1 (0.58 MPa abs) contacts and record the respective operating pressures on the bushing check list, see Appendix 7. In case of malfunction, check the wiring and inform GE Energy Connections Supervisor. During the alarm / tripping functionality test, record on the bushing check list the readings on the two •...

  • Page 26: Gas Characteristics Before The Energization

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 26 of 70 Kepco project WARNING: The gas re-filling operation MUST be performed with the bushing de-energized and grounded. Safety prescriptions of Chapter 2 must be followed. WARNING: The refilling action must be performed by qualified operators. The risk is that a wrong operation can drain the gas from the bushing with possibility of plant tripping and equipment damages if the gas leakage will be excessive.

  • Page 27: Gas Density Monitor

    Keep the vacuum for at least 12 hours. Proceed with the gas filling operation (see Chapter 8). If there is evidence of pressure drop it is necessary to investigate the problem with the support of a GE • Energy Connections Specialist.

  • Page 28: Power Factor Tap

    NOTE: Due to the instrument principle of operation, the replacement of bushing gas from SF6 to a gas mixture SF6 N2 is not allowed without replacing the gas density monitors with the proper type. In this case contact GE Energy Connections RPV for support, instructions and approval.

  • Page 29: Voltage Divider Unit

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 29 of 70 Kepco project To the PF tap it is possible to connect the voltage divider for the valve operation controlling system (see Chapter 12). WARNING: PF tap MUST be accurately closed with its cap or connected to the voltage divider unit. Missing the cap is dangerous and it will cause an electrical failure at bushing energizing.

  • Page 30: Composite Insulators Maintenance

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 30 of 70 Kepco project The divider is a passive unit so the loading capacity is limited. It must be used in conjunction with a suitable electronic amplifier. The accuracy class is guaranteed for resistive loads ≥ 1 MOhm.
  • Page 31 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 31 of 70 Kepco project Useful indications about the composite insulator maintenance plan main actions are shown in Table 18. It is recommended to perform all Table 18 listed actions, as a reference starting point, at the plant start-up.

  • Page 32: General Maintenance Plan

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 32 of 70 Kepco project General maintenance plan The general maintenance plan is described in the next Table 19. Component Time base Description Notes Composite insulators See Chapter 13...
  • Page 33 DILO In case of frequent re- leakage valves. filling, plan replacement bushing and contact GE Energy Connections RPV. Regenerate / replace the Check the gas dew point at line gas if moisture exceeds Gas quality...

  • Page 34: Disposal At The End Of Life

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 34 of 70 Kepco project Disposal at the end of life At the end of the bushing operative life all parts can be recycled or disposed as follows: Part...
  • Page 35 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 35 of 70 Kepco project List of appendices Appendix 1 – Bushing outline drawing. Appendix 2 – Electrical scheme. Appendix 3 – Lifting tools. Appendix 4 – Gas density monitor Electronsystem.

  • Page 36: Appendix 1 - Bushing Outline Drawing

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 36 of 70 Kepco project Appendix 1 – Bushing outline drawing PHI 265kV 1500A...
  • Page 37 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 37 of 70 Kepco project PHI 530kV 2500A...

  • Page 38: Appendix 2 - Electrical Scheme

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 38 of 70 Kepco project Appendix 2 – Electrical scheme PHI 265kV 1500A...
  • Page 39 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 39 of 70 Kepco project PHI 265kV 1500A...
  • Page 40 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 40 of 70 Kepco project PHI 265kV 1500A...
  • Page 41 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 41 of 70 Kepco project PHI 265kV 1500A...
  • Page 42 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 42 of 70 Kepco project PHI 265kV 1500A...
  • Page 43 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 43 of 70 Kepco project PHI 265kV 1500A...
  • Page 44 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 44 of 70 Kepco project PHI 265kV 1500A...
  • Page 45 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 45 of 70 Kepco project PHI 530kV 2500A...
  • Page 46 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 46 of 70 Kepco project PHI 530kV 2500A...
  • Page 47 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 47 of 70 Kepco project PHI 530kV 2500A...
  • Page 48 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 48 of 70 Kepco project PHI 530kV 2500A...
  • Page 49 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 49 of 70 Kepco project PHI 530kV 2500A...
  • Page 50 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 50 of 70 Kepco project PHI 530kV 2500A...
  • Page 51 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 51 of 70 Kepco project PHI 530kV 2500A...

  • Page 52: Appendix 3 - Lifting Tools

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 52 of 70 Kepco project Appendix 3 – Lifting tools PHI 265kV 1500A...
  • Page 53 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 53 of 70 Kepco project PHI 265kV 1500A...
  • Page 54 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 54 of 70 Kepco project PHI 265kV 1500A...
  • Page 55 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 55 of 70 Kepco project PHI 265kV 1500A...
  • Page 56 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 56 of 70 Kepco project PHI 530kV 2500A...
  • Page 57 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 57 of 70 Kepco project PHI 530kV 2500A...
  • Page 58 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 58 of 70 Kepco project PHI 530kV 2500A...
  • Page 59 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 59 of 70 Kepco project PHI 530kV 2500A...

  • Page 60: Appendix 4 - Gas Density Monitor Electronsystem

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 60 of 70 Kepco project Appendix 4 – Gas density monitor Electronsystem...
  • Page 61 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 61 of 70 Kepco project...
  • Page 62 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 62 of 70 Kepco project...
  • Page 63 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 63 of 70 Kepco project...
  • Page 64 HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 64 of 70 Kepco project...

  • Page 65: Appendix 5 - Oil Pressure Gauge

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 65 of 70 Kepco project Appendix 5 – Oil pressure gauge...

  • Page 66: Appendix 6 - Composite Insulators Maintenance And Repairing

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 66 of 70 Kepco project Appendix 6 - Composite insulators maintenance and repairing...

  • Page 67: Appendix 7 - Bushing Installation Check List

    Check the status of the oil valves and the warranty seals Only for bushings shipped with the electronic Electronic Impact recorder (if installed) Remove the impact recorder and ship it to GE Energy Connections RPV. impact recorder Oil final characteristics: Water content by KF at 20°...
  • Page 68 Open the turret manhole providing that any foreign material will not drops inside See instruction manual In case of damages on the cone surface: - Contact GE Energy Connections RPV. Check that the cone will not interfere with the - Remove the bushing from the turret and...
  • Page 69 Remote pressure: ________________MPa bs full test sequence. Gas filling 3) Inform GE Energy Connections RPV Increase the gas pressure until Alarm 1 contact operates (0.58 MPa abs). Gas pressure (B3/B4)=______/_____MPa abs Check the remote reading of the gas pressure sensor...

  • Page 70: Appendix 8 - Gas Filling Check List

    HVDC TRANSFORMER BUSHINGS PHI 530.1425.2500 IS 2664 GB PHI 265.850.1500 Page 70 of 70 Kepco project Appendix 8 – Gas filling check list ppm by weight from gas certificates ppm by weight from measurements Hydrolizable Total acidity Dew point at...

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Phi 265.850.1500

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