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ABB GOE(2), Installation And Commissioning Manual

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Installation and commissioning guide
1ZSC000563-ACF EN, REV. A, 2020-06-25

3

Contents

1  

Safety

5

1.1  

Levels of safety risks ................................................................................................................................................................... 5

1.2  

Hazardous working situations ..................................................................................................................................................... 6

1.3  

Safety precautions....................................................................................................................................................................... 6

1.4  

Competence level........................................................................................................................................................................ 6

 

2  

Product description

7

2.1  

Design ......................................................................................................................................................................................... 7

2.2  

Technical specification................................................................................................................................................................. 11
2.2.1  

General specifications ............................................................................................................................................... 11

2.2.2  

Mechanical loading.................................................................................................................................................... 11

 

3  

Delivery

13

3  

Incoming inspection..................................................................................................................................................................... 13

3.1  

Transportation ............................................................................................................................................................................. 13

3.2  

Storage........................................................................................................................................................................................ 13

3.3  

Lifting........................................................................................................................................................................................... 14
3.3.1  

Lifting the transport box............................................................................................................................................. 14

3.3.2  

Lifting the bushing out of the transport box ............................................................................................................... 15

 

4  

Installation

17

4.1  

Tools ............................................................................................................................................................................................ 17

4.2  

Consumables .............................................................................................................................................................................. 17

4.3  

Preparations ................................................................................................................................................................................ 18
4.3.1  

Installation of lifting tools ........................................................................................................................................... 18

4.3.2  

Lifting the bushing for installation on the transformer................................................................................................ 20

4.4  

Installation with draw lead ........................................................................................................................................................... 21
4.4.1  

Installation with draw lead ......................................................................................................................................... 21

4.5  

Installation with draw rod at transformer factory.......................................................................................................................... 25
4.5.1  

Removal of the lower draw rod with bottom contact from the bushing ..................................................................... 25

4.5.2  

Installation of the small bottom contact in the transformer ........................................................................................ 29

4.5.3  

Installation of the large bottom contact in the transformer ........................................................................................ 30

4.5.4  

Installation of the bushing on the transformer ........................................................................................................... 32

4.6  

Installation with draw rod at site .................................................................................................................................................. 35
4.6.1  

Preparations at site ................................................................................................................................................... 35

4.6.2  

Installation of the bushing on the transformer at site................................................................................................. 38

4.7  

Hydraulic tightening of the draw-rod nut...................................................................................................................................... 42

4.8  

Manual tightening of the draw-rod nut......................................................................................................................................... 45

4.9  

Minimum oil-level in transformer ................................................................................................................................................. 46

4.10  

Installation of the outer terminal .................................................................................................................................................. 46

4.11  

Grounding of the bushing flange ................................................................................................................................................. 49

Summary of Contents for GOE(2)

Page 1: ...1ZSC000563 ACF EN REV A 2020 06 25 Transformer bushing type GOE 2 Installation and commissioning guide ...

Page 2: ...or any errors that may appear in this document ABB AB is not liable for any damage resulting from the incorrect interpretation of this document This document or parts thereof may not be reproduced or copied without ABB AB s consent It may not be distributed to others or used by unauthorized parties Any breaches to the above will be penalized with the support of applicable laws ...

Page 3: ...s 18 4 3 2 Lifting the bushing for installation on the transformer 20 4 4 Installation with draw lead 21 4 4 1 Installation with draw lead 21 4 5 Installation with draw rod at transformer factory 25 4 5 1 Removal of the lower draw rod with bottom contact from the bushing 25 4 5 2 Installation of the small bottom contact in the transformer 29 4 5 3 Installation of the large bottom contact in the tr...

Page 4: ...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 inform...

Page 5: ...oduct It is used for example to warn of such dangers as contact with high voltage explosion or fire risk risk for toxic gases risk of crushing impacts falls from high places etc CAUTION The round warning symbol warns that an accident could occur if the instructions are not observed and that this could result in personal injury and or damage to the product It is also used to warn of risks that enta...

Page 6: ...h heavy objects Do not walk under lifted objects Make sure that heavy objects are stable before starting work 1 3 Safety precautions Precaution Action Transformer oil Collect used transformer oil in drums Transformer oil is dangerous Fumes from hot oil can cause irritation to the respiratory organs and the eyes Long and repeated contact with transformer oil can cause damage to your skin Waste and ...

Page 7: ...e for immersed oil air service For a detailed description please refer to the Technical guide 1ZSE 2750 105 General schematics G000378 9 Oil plug 26 Oil level gauge 51 Oil sampling valve 65 Mounting flange 68 Top housing 69 Porcelain insulator air side 70 Test tap 71 Extension for current transformer 72 Porcelain insulator oil side 74 Lifting eye Ø 25 mm 78 End shield 79 Top end nut ...

Page 8: ...The draw rod system can be configured with a small or a large bottom contact Terminal system Option Draw lead system Draw rod system Small bottom contact Large bottom contact G004304 A Draw lead system B Draw rod system with small bottom contact N1 4 C Draw rod system with large bottom contact N1 4 2 Draw lead 32 Inner terminal 35 Draw rod 40 Small bottom contact N1 4 41 Large bottom contact N1 4 ...

Page 9: ...od with one upper joint 52 it is always locked with threadlocking fluid All joints must be locked with threadlocking fluid when the bushing is in operation at site G006404 39 Lower joint at flange level 52 Upper joint 53 Additional joint option 54 Thread is locked with threadlocking fluid 55 Thread is NOT locked with threadlocking fluid 56 Bottom contact joint locked with threadlocking fluid All u...

Page 10: ...s The test tap can be used as a power source if it is connected to an external capacitance The operating voltage is limited to 6 kV CAUTION Do not energize the bushing without a test adapter or the cover installed The bushing is grounded through the cover to prevent damage to the bushing G002993 3 O ring 9 Oil plug for oil filling if the test tap is used as power source 57 Stud 58 Cover 59 Groundi...

Page 11: ...edium Transformer oil Maximum daily mean oil temperature 90 C Maximum temporary oil temperature at short time overload 115 C Oil level in transformer Not lower than 30 mm from the bushing flange Maximum pressure of medium pg 100 kPa pg relative to ambient pressure Angle of installation 0 to 30 from vertical Test tap Test tap with 8 mm male contact pin According to IEEE type A Conductor Center tube...

Page 12: ...ic load D Load applied at the midpoint Type Test load 1 minute N Maximum cantilever load in operation at installation angle N Maximum axial static load N 0 30 GOE 2 1175 10000 5000 4400 20000 GOE 2 1425 10000 5000 4100 20000 GOE 2 1550 10000 5000 3900 20000 GOE 2 1675 10000 5000 3900 20000 Maximum permitted torque on the outer terminal The maximum torque that is permitted on the outer terminal is ...

Page 13: ...not shown correctly when the bushing is in the horizontal position 3 2 Transportation The bushing must be transported in the transport box The bushing must be transported in the horizontal position Carefully inspect the bushing for damage after transportation 3 3 Storage Short term storage less than 6 months The bushing can be stored outdoors if it is in the transport box Keep the transport box pr...

Page 14: ...al position with the top end upwards and put it in a safe stand As an alternative keep the bushing in the transport box and lift it to an inclined position with the top end upwards and at an angle of at least 7 The bushing is delivered from ABB in a transport box and the bushing is held in place by support blocks and fiberboard in the box The transport box is marked with Top end this identifies th...

Page 15: ...fting slings 8 3 Make sure that the angle of the soft lifting sling is not more than 20 4 Carefully lift the transport box 5 Set down the transport box on a flat surface End of instruction 3 4 2 Lifting the bushing out of the transport box Overview G000391 79 Top end nut Procedure 1 Make sure that the crane is approved for lifting the weight of the bushing Refer to the net weight on the packing li...

Page 16: ...lange and then to the crane hook G006405 5 Attach a soft lifting sling to the top end nut 79 and then to the crane hook NOTE If the outer terminal is not installed please contact ABB G006423 6 Carefully lift the bushing 7 Make sure that the support blocks are in the same positions as the support blocks in the transport box CAUTION Do not apply force to the ceramic insulator it will break 8 Lower t...

Page 17: ...shing flange Hydraulic jack 9769 897 A For removal and installation of the bottom contact Draw rod system Box spanner 9760 669 B For removal and installation of the bottom contact Draw rod system Tackle For installation of the bushing at a specific angle 4 2 Consumables Item Brand ABB part number Note Oil based Vaseline Fuchs For treatment of contact surfases Does not react with transformer oil Mo...

Page 18: ...CF EN REV A 2020 06 25 4 3 Preparations 4 3 1 Installation of lifting tools Overview G001931 1 Lifting tool 30 Soft bedding e g rubber mat or woodboard 31 Shackle Procedure 1 Loosen the M8 bolts 24 NOTE It is not necessary to remove the M8 bolts G006900 ...

Page 19: ... Keep the outer terminal 5 washers 7 and bolts 6 they will be used again G006855 3 If the bushing has the draw lead system remove the divided ring 80 and the inner terminal 32 G006854 4 Install the lifting tool 1 the M10 bolts 6 and the washers 7 NOTE Align the side of the lifting tool with the oil level guage 26 G004721 Torque 40 4 Nm End of instruction ...

Page 20: ... and contact with the floor can cause damage G005060 4 For installation of the bushing at a specific angle 1 Attach soft lifting slings with a shackle 31 on the flange and to the crane hook NOTE For installation with an inclined angle the bushing should be mounted with the oil level gauge 26 downwards G005059 5 Carefully lift the bushing from the floor CAUTION Make sure that the bushing does not r...

Page 21: ...V A 2020 06 25 21 4 4 Installation with draw lead 4 4 1 Installation with draw lead Overview G002945 2 Draw lead 12 Pull through cord 32 Inner terminal 33 Bushing Procedure 1 Braze the draw lead 2 from the transformer windings to the inner terminal 32 G001938 ...

Page 22: ...3 Install the springs 15 the guiding sleeves 16 the pressing ring 17 and the M8 hex screws 18 to the bottom end of the bushing G006851 Torque 40 Nm 4 Install the end shield 1 Push the end shield carefully against the pressing ring 17 until the hex screw heads come through the holes in the end shield 2 Turn the end shield clockwise approximately 20 to its locked position G003006 ...

Page 23: ...ld the pull through cord 12 in tension while lowering the bushing onto the transformer CAUTION Do not damage the stud bolts on the transformer There is a risk of metal falling into the transformer CAUTION Make sure that the draw lead is entering the bushing correctly Monitor the draw lead through the inspection openings on the transformer NOTE Plastic sleeves put on two or three of the stud bolts ...

Page 24: ...the torque then to the full torque G000719 Torque Please refer to the transformer manufacturer 9 Put the divided ring 80 in the slot in the inner terminal 32 G006848 10 Carefully lower the inner terminal 32 with the pull through cord 12 until the divided ring 80 touches the bushing top surface NOTE The divided ring is held in position only by the weight of the inner terminal Install the outer term...

Page 25: ...terminal page 46 End of instruction 4 5 Installation with draw rod at transformer factory 4 5 1 Removal of the lower draw rod with bottom contact from the bushing Overview The bottom contact is usually installed in the bushing when it is delivered from ABB the first step at the transformer factory is thus to remove it G006804 4 Lower draw rod 33 Bushing 35 Upper draw rod 36 Bottom contact ...

Page 26: ...the shaft 37 G006805 2 Make sure that more than 10 mm of the threads on the upper draw rod 35 is used by the shaft 37 G006806 3 Put the hydraulic jack 38 on the shaft 37 and install the nut 44 and washer but do not tighten it NOTE The hydraulic jack must be in the middle of its stroke If not the tension of the draw rod cannot be released when the draw rod nut is loosened G006807 ...

Page 27: ...box spanner with a wrench Refer to the instructions for the hydraulic jack DANGER Apply the hydraulic pressure carefully Incorrectly used high pressure hydraulics can break with explosive force CAUTION Do not remove the compensation device NOTE The draw rod is installed with a tension of 40 kN G006907 5 Loosen the nut 44 G006809 6 Turn the shaft 37 counter clockwise to remove the shaft socket from...

Page 28: ...0 NOTE The draw rod will fall out of the bushing if it is not in the horizontal position G006812 10 Pull down the draw rod from the bottom end of the bushing and disassemble it at the lower joint 39 NOTE The upper thread 60 is locked with thread locking fluid grade 42 NOTE As standard the thread joint 56 between the draw rod and the bottom contact is locked with thread locking fluid grade 42 The g...

Page 29: ...the small bottom contact in the transformer Overview G004295 40 Small bottom contact Procedure 1 Install the springs 15 the guiding sleeves 16 the pressing ring 17 and the hex screws M10 18 to the bottom end of the bushing G002998 Torque 40 Nm 2 Put the winding cables through the end shield G007285 ...

Page 30: ...above the opening in the transformer 5 Continue with Installation of the bushing on the transformer page 32 End of instruction 4 5 3 Installation of the large bottom contact in the transformer Overview The end shield can be installed to both the large bottom contact and the bottom nut of the bushing This procedure describes installation on the bottom contact For installation on the bottom nut refe...

Page 31: ...ottom contact CAUTION Make sure that there is no tension in the winding cables Tension in the winding cables will cause damage to the bottom contact G003001 Torque 68 6 Nm 3 Install the end shield 1 Push the end shield carefully against the pressing ring 17 until the hex screw heads come through the holes in the end shield 2 Turn the end shield approximately 20 to its locked position G004294 4 Lif...

Page 32: ...sformer Overview It is important to install the draw rod correctly thus the ends of the draw rod parts must make contact at 67 G007287 CAUTION Do not disassemble the joints 52 these are correctly assembled and locked with tread locking fluid by ABB Procedure 1 Connect the upper draw rod 35 to the lower draw rod 4 G001932 ...

Page 33: ...rts must make contact at 67 G006814 3 If the bushing has the small bottom contact then install the end shield 1 Push the end shield carefully against the pressing ring 17 until the hex screw heads comes through the holes in the end shield 2 Turn the end shield approximately 20 to its locked position G004302 4 Hold the pull through cord 12 in tension while mounting the bushing into the transformer ...

Page 34: ...ilub to the nut 10 and the threads of the draw rod 2 Install the washer 11 and nut 10 on the draw rod tighten with your fingers 3 Remove excess Molykote Multilub with a rag CAUTION If the nut 10 is not lubricated correctly it will not be tighten to the correct torque This can cause the bushing to fail G005063 7 Tighten the draw rod nut 10 NOTE Make sure that more than 10 mm of the threads on the u...

Page 35: ...ighten the draw rod nut refer to Hydraulic tightening of the draw rod nut page 42 or Manual tightening of the draw rod nut page 45 End of instruction 4 6 Installation with draw rod at site 4 6 1 Preparations at site Overview This procedure is only applicable if the lower draw rod with the bottom contact 36 is installed in the transformer G006891 ...

Page 36: ...ide 1ZSC000563 ACF EN REV A 2020 06 25 Procedure 1 Loosen the M8 bolts 24 G006900 2 Remove the M10 bolts 6 and then remove the outer terminal 5 G006904 3 Install the lifting tool 1 the M10 bolts 6 and the washers 7 G001935 Torque 40 4 Nm ...

Page 37: ...0 5 Apply Molykote Multilube to the thread on the pull through cord 12 and then connect it to the draw rod NOTE Or use a lubricant with equal properties to Molykote Multilube G006811 6 Remove the M16 nut 10 and washer G006906 7 With a soft cloth carefully clean the bottom end of the bushing and the inside of the center hole Look for damage ...

Page 38: ...ower draw rod 4 G004681 10 Lift the bushing to a position above the installation opening on the transformer End of instruction 4 6 2 Installation of the bushing on the transformer at site Procedure 1 Apply locking fluid on the threads 39 on the lower draw rod 4 CAUTION Make sure that all joints in the draw rod are locked with thread locking fluid NOTE Use thread locking fluid grade 42 and activato...

Page 39: ...to the rating plate for the distance L NOTE When the joint is correctly threaded 2 threads on the upper 60 and lower 39 threads are visible To get the correct draw rod length the ends of the draw rod parts must make contact at 67 G006814 4 If the bushing has the small bottom contact then install the end shield 1 Push the end shield carefully against the pressing ring 17 until the hex screw heads c...

Page 40: ...rs and nuts Tighten the nuts in a crosswise sequence CAUTION Make sure that the nuts are tightened evenly First tighten all nuts to half the torque then to the full torque G000719 Torque Please refer to the transformer documentation 7 Install the draw rod nut 10 1 Apply a generous quantity of Molykote Multilub to the nut 10 and the threads of the draw rod 2 Install the washer 11 and nut 10 on the ...

Page 41: ...the draw rod nut 10 G005062 Torque 10 Nm 9 Remove the bolts 6 washers 7 and lifting tool 1 G001935 10 Remove the pull through cord 12 11 Tighten the draw rod nut refer to Hydraulic tightening of the draw rod nut page 42 or Manual tightening of the draw rod nut page 45 End of instruction ...

Page 42: ...cedure 1 Measure the distance a Measuring is performed when the draw rod nut is tightened with torque 10 Nm NOTE The bushing is delivered with an information sheet that specifies the draw rod extension b a These values are measured when the bushing is manufactured and are unique to every unit NOTE Record the values in Measurement record page 77 for future reference G006845 ...

Page 43: ... draw rod 35 are used G006806 4 Put the hydraulic jack 38 on the shaft 37 and install the nut 44 but do not tighten it G006807 5 Pull the draw rod with 40 kN DANGER Apply the hydraulic pressure carefully Incorrectly used high pressure hydraulics can break with explosive force NOTE It is not necessary to compensate for variations in ambient temperature 6 Turn the nut on the upper draw rod 35 with t...

Page 44: ...he bushing G006810 10 Make sure that the draw rod extension is within the tolerances 1 Measure the distance b 2 Calculate the extension of the draw rod b minus a 3 Compare the calculated value b a with the dimension in the table NOTE Record the values in Measurement record page 77 for future reference Type Extension GOE 2 1175 8 5 mm 1 0 GOE 2 1425 9 5 mm 1 0 GOE 2 1550 10 5 mm 1 0 GOE 2 1675 10 5...

Page 45: ...edure 1 Make sure that the draw rod nut and threads of the draw rod are correctly lubricaded and that the draw rod nut is tightened to 10 Nm 2 Measure the distance a G006845 3 Turn the nut clockwise until you get the correct extension b Distance b a extension refer to the table CAUTION Make sure that you do not overtighten the nut Use a torque wrench set to 140 Nm NOTE One turn of the nut correspo...

Page 46: ...e CAUTION A lower oil level will reduce the electrical insulation G006905 End of instruction 4 10 Installation of the outer terminal Procedure 1 Prepare the contact surface 47 and gasket surface 87 1 Carefully clean the contact surface and gasket surface with a soft cloth 2 Apply Vaseline to the contact surface 3 Apply Mobilgrease 28 to the gasket surface CAUTION Do not use a wire brush on the tin...

Page 47: ... coating on aluminium outer terminals A wire brush can make scratches in the tin zinc coating 47 NOTE Or use lubricants with equal properties to Vaseine and Mobilgrease 28 NOTE When the outer terminal 5 is installed at site for grid operation replace the used O ring 3 with a new O ring A new O ring is supplied with the bushing G006913 3 Assemble the tightening ring 48 the O ring 3 and the outer te...

Page 48: ...e sequence CAUTION Make sure that the outer terminal moves straight down Turn each bolt a little and then the next bolt until all bolts can be tightened to the correct torque G006898 Torque 40 4 Nm 9 Tighten the M8 bolts 24 Tighten the bolts in a crosswise sequence G006900 Torque 20 2 Nm 10 Install the external connections Refer to the documentation from the supplier of the external connection End...

Page 49: ...set screw 1 Apply a large quantity of Mobilgrease 28 to the cone point set screw 50 CAUTION The quality of the cone point set screw is important stainless steel of A4 80 quality is recommended NOTE Or use a lubricant similar to Mobilgrease 28 G000380 2 Install the cone point set screw 50 NOTE The cone point of the set screw penetrates the paint This makes an electrical connection between the bushi...

Page 50: ...e bolt is important stainless steel of A4 80 quality is recommended NOTE Or use a lubricant similar to Mobilgrease 28 4 Install the bolt 50 Torque M12 40 Nm 5 Connect the other end of the flexible cable 64 to the transformer NOTE This makes an electrical connection between the bushing and transformer tank keeping them at the same potential End of instruction ...

Page 51: ... CAUTION If you do not obey this procedure flashovers or partial discharges can occur inside the bushing Waiting times after oil filling of the transformer Some waiting time is necessary after the transformer has been oil filled before the bushing is energized The reason for this is that air bubbles stick to the bushings surface when the transformer is filled with oil and flashovers and partial di...

Page 52: ... 3 Tightness test of bushing outer terminal Overview Because the outer terminal is often situated above the oil level of the transformer oil expansion system a leak at the outer terminal is serious Water could enter directly into the transformer insulation It is thus recommended to do a tightness test after installation of the bushing both with vacuum and pressure Different methods can be used and...

Page 53: ...nditioning C1 is the capacitance between the test tap and the outer terminal C2 is the capacitance between the test tap and ground Nominal capacitance The capacitance C2 depends on the transformer and it is not possible to give a nominal value that is valid for all service conditions Thus it is important to measure and record the capacitance C2 for future reference such as repairs service etc Type...

Page 54: ...ith the correction factor given below Bushing core temperature C Correction factor to 20 C IEC 0 2 0 80 3 7 0 85 8 12 0 90 13 17 0 95 18 22 1 00 23 27 1 05 28 32 1 10 33 37 1 15 38 42 1 20 43 47 1 25 48 52 1 30 53 57 1 34 57 62 1 35 63 67 1 35 68 72 1 30 73 77 1 25 78 82 1 20 83 87 1 10 Procedure 1 De energize the transformer 2 Disconnect the external connections from the outer terminal of the bus...

Page 55: ...ference 7 Install the cover 58 CAUTION The test tap is not self grounding The bushing can be destroyed if the test tap is not grounded Because the capacitance C2 is usually relatively small the test tap must never be open circuited when applying a voltage to the bushing It must always be grounded or connected to an external impedance CAUTION Do not energize the bushing without the cover or a test ...

Page 56: ...er terminal of the other bushing on the same transformer winding The through resistance will include the resistance of both bushings all connections and the transformer winding Do the measurement of through resistance before connecting any of the external circuits Because the result of the measurement depends on the temperature and the accuracy with which the temperature can be measured this can b...

Page 57: ...ommended to check the oil level at plant supervision Cleaning of the insulator surface If the insulator is exposed to very high pollution it can be necessary to clean the surface Remove the pollution with a moist cloth or a low pressure water jet If necessary put isopropyl alcohol on the cloth DANGER 1 1 1 Trichloroethane or Methyl chloride are not recommended as detergents because they are danger...

Page 58: ...movision infrared camera check for local overheating on connectors At the maximum rated current the bushing outer terminal normally operates at a temperature of about 35 C to 45 C above the ambient temperature Significantly higher temperatures can be a sign of bad connections especially at lower current loading Checking of oil leakage Make a visual inspection for oil leakage during regular station...

Page 59: ...lways be above the red area on the oil level indicator If the oil level is in the red area fill the bushing with clean and dry transformer oil Please contact ABB for the correct oil level Oil filling is only allowed when the temperature of the bushing is between 5 C and 35 C Procedure 1 Check the oil level NOTE The oil level must be above the red area 29 G006767 ...

Page 60: ...o not use power tools and make sure that you do not to cause sparks with manual tools Explosive gases can be generated during normal operation of the bushing CAUTION Be careful when the oil plug is removed contamination can enter the bushing CAUTION Do not use a pipe to fill the bushing with transformer oil it can cause damage to the parts in the bushing Use a plastic or rubber hose G001912 Torque...

Page 61: ...to hold the oil valve 51 while removing the cover 89 with a second wrench G007225 3 Connect the end of a hose to a nipple and then connect the nipple to the oil valve 51 on the flange NOTE The thread on the oil valve is R BSPT 4 Take the oil sample 1 Open b the oil valve 51 2 Drain a small amount of the transformer oil 3 Close a the oil valve 51 G006910 5 Install the cover 89 CAUTION Make sure tha...

Page 62: ... fill the bushing with oil after an oil sample is taken But it can be necessary to fill the bushing with oil when many oil samples have been taken G006767 7 Wait before energizing the bushing If bubbles where not introduced into the transformer oil wait one hour If bubbles where introduced into the transformer oil wait 12 hours CAUTION Flashovers and partial discharges can form in the bubbles this...

Page 63: ...h the box spanner 13 NOTE The terminal on the pull through cord 12 has M8 threads NOTE ABB Components recommends that the hydraulic jack is used for the removal of the lower draw rod refer to Removal of the lower draw rod with bottom contact from the bushing page 25 steps 1 through 8 G004924 3 Apply Molykote Multilub to the thread on the pull through cord 12 then connect it to the draw rod NOTE Or...

Page 64: ... A 2020 06 25 4 Remove the M16 nut 10 on the draw rod with the box spanner 13 G000690 5 Remove the nuts and washers G000719 6 Lift the bushing from the transformer CAUTION Do not damage the stud bolts there is a risk of metal falling into the transformer G003002 ...

Page 65: ...e the joint 60 this increases the risk of incorrect assembly The joint 60 is locked with tread locking fluid grade 42 NOTE The bushing can have an optional joint or the bottom contact unlocked 56 refer to the specifications for your bushing The guiding cone 62 is loose G005033 8 Pull up the draw rod and install the washer 11 and nut 10 G001872 9 Remove the pull through cord 12 10 Lower the bushing...

Page 66: ...upper draw rod 35 and support tubes 80 by hand CAUTION Be careful when pulling out the draw rod The bushings inside can easily be damaged G007342 12 Install the lower draw rod 4 in the transport cover 45 G004681 13 Install the transport cover 45 on the transformer turret 46 End of instruction ...

Page 67: ... inside of the center tube 2 Lift the bushing Refer to Lifting the bushing out of the transport box page 15 3 Lower the bushing into the transport box CAUTION Make sure that the there is soft bedding in the transport box CAUTION Make sure that the oil valves and test tap does not make contact with the transport box or other objects 4 Attach the bushing to the transport box in the same way as when ...

Page 68: ...68 Installation and commissioning guide 1ZSC000563 ACF EN REV A 2020 06 25 5 Close the transport box NOTE Refer to Lifting the transport box page 14 and Transportation page 13 End of instruction ...

Page 69: ... bushing is damaged we recommend that it is returned to ABB for repairs and re testing Some parts that are damaged or lost during transportation or installation can be ordered from ABB 8 2 Spare parts Cover For the test tap Position Part Article number Note 3 O ring 1ZSC00442 CAK 58 Cover 2769 522 M G006917 ...

Page 70: ...ZSC000563 ACF EN REV A 2020 06 25 Oil plug 2522 731 A Position Part Article number Note 9 Oil plug 2121 738 18 77 Gasket 1ZSC001591 AAC G006195 8 3 Special tools Lifting tool Position Part Article number Note 1 Lifting tool 9760 668 C G006838 ...

Page 71: ...6 25 71 Pull through cord Position Part Article number Note 12 Pull through cord 9760 669 A With M8 terminal G006918 Hydraulic jack Position Part Article number Note 38 Hydraulic jack 9769 897 A For removal and installation of the bottom contact Draw rod system G006919 ...

Page 72: ...72 Installation and commissioning guide 1ZSC000563 ACF EN REV A 2020 06 25 Box spanner Position Part Article number Note 13 Box spanner 9760 669 B G006920 ...

Page 73: ...mponents should be sent to an approved environmental waste treatment plant for destruction or disposal DANGER Be careful when dissembling the bushing There is a large quantity of mechanical energy stored in the bushing from its assembly disassembly of the bushing can cause it to break with explosive force The bushing has these parts and materials The conductor is made of copper or low alloy alumin...

Page 74: ...es of plastic should be separated and sent to an approved environmental waste treatment plant or recycling plant The energy content in thermoplastics and thermosetting plastics can often be recovered through combustion at a plant built for the purpose Thermoplastics can usually be melted down and reused without significant loss of quality Composites can be fractioned and used as filling materials ...

Page 75: ...2020 06 25 75 10 References 10 1 Summary Markings Conforming to IEC IEEE Bushing diagnostics and conditioning 2750 515 142 Test adapter Technical guide 1ZSC000563 ACS Test adapter Installation and maintenance guide 1ZSC000563 ACD Transformer oil IEC 60296 class 2 ...

Page 76: ...76 Installation and commissioning guide 1ZSC000563 ACF EN REV A 2020 06 25 ...

Page 77: ... ACF EN REV A 2020 06 25 77 11 Appendix 11 1 Measurement record Overview Record the final measurements of the draw rod Record Serial number Date Operator G007356 a mm 1 b mm 2 1 Draw rod nut tightened with 10 Nm 2 After hydraulic tightening Comments ...

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Page 80: ...r Grids Sweden AB Components SE 771 80 Ludvika Sweden www abb com transformercomponents Copyright 2020 ABB All rights reserved Specifications subject to change without notice 1ZSC000563 ACF EN REV A 2020 06 25 ...

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