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ABB 1ZSC902110-AAA Installation And Commissioning Manual Download Page 62

62

Installation and commissioning guide

1ZSC000563-AAF EN, REV. 4, 2021-06-23

2.

If the oil-level is low, fill the bushing with
transformer oil.

1.

Remove the cover (58) and oil-plug (9).

2.

Fill the bushing with transformer oil to the
correct oil-level. For more information,
contact Hitachi ABB Power Grids.

3.

Install and tighten the oil-plug (9).
Use a new gasket (77), article number:
1ZSC001591-AAC.

4.

Install the cover (58) and gasket (66).
Use an new gasket, part number:
2152 795-67

DANGER!

Risk of high pressure!

Slowly open the oil-plug (9) to release
pressure. High pressure in the bushing
can throw the oil-plug (9) with a large
quantity of kinetic energy, and cause
personal injury.

DANGER!

Risk of explosion!

Do 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.

G006768

Torque

20 Nm

End of instruction

6.3 Taking oil samples

Overview

Taking oil samples is generally not recommended.

Oil samples should only be performed by authorized personnel. For more information, please refer to product
information 2750 515-142 "Bushing diagnostics and conditioning".

Summary of Contents for 1ZSC902110-AAA

Page 1: ...1ZSC000563 AAF EN REV 4 2021 06 23 Transformer bushing type GOE 2600 Installation and commissioning guide ...

Page 2: ...or any errors that may appear in this document Hitachi ABB Power Grids 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 Hitachi ABB Power Grids 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 ap...

Page 3: ...ls 20 4 3 2 Lifting the bushing for installation on the transformer 22 4 4 Installation at the transformer factory 24 4 4 1 Removal of the lower draw rod with bottom contact from the bushing 24 4 4 2 Installation of the small bottom contact N1 4 in the transformer 27 4 4 3 Installation of the large bottom contact N1 6 in the transformer 29 4 4 4 Installation of the bushing on the transformer 31 4 ...

Page 4: ...easurement of through resistance 58 6 Maintenance 59 6 1 Recommended maintenance 59 6 2 Checking the oil level 61 6 3 Taking oil samples 62 7 Re packing 65 7 1 Removal of the bushing from the transformer draw rod 65 7 2 Removal of the bushing from the transformer fixed bottom contact 68 7 3 Re packing of the bushing 71 8 Spare parts and special tools 73 8 1 Summary 73 8 2 Spare parts 73 8 3 Specia...

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: ...ance graded oil impregnated paper bushing made for immersed oil air service General schematics G006945 9 Oil plug 26 Oil level gauge 36 Bottom contact 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 70 mm ...

Page 8: ... as standard The bushing has draw rod with two upper joints 52 they are always locked with threadlocking fluid All joints must be locked with threadlocking fluid when the bushing is in operation at site G006981 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 join...

Page 9: ...cts the outermost conductive layer to ground and must always be installed when the bushing is energized The maximum one minute test voltage for this test tap is 20 kVrms 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 conden...

Page 10: ...former bushing Oil impregnated paper capacitance graded oil immersed For outdoor use Ambient temperature limits 40 C to 40 C limit temperatures Maximum altitude of site 1000 m Level of rain and humidity 1 2 mm rain minute horizontally and vertically according to IEC 60060 1 Maximum pollution level According to the specific creepage distance and IEC 60815 Immersion medium Transformer oil Maximum da...

Page 11: ...tallation angle can be 0 30 from vertical NOTE The loads described in this section are static loads for dynamic loads such as earthquakes and extreme wheather conditions please contact your Hitachi ABB Power Grids sales representative G006946 A Maximum cantilever load at installation angle 0 B Maximum axial static load C Load applied at the midpoint Type Test load 1 minute N Maximum cantilever loa...

Page 12: ...12 Installation and commissioning guide 1ZSC000563 AAF EN REV 4 2021 06 23 ...

Page 13: ...ine can appear as oil NOTE The oil level is 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...

Page 14: ...the vertical position 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 Hitachi ABB Power Grids in a transport box and the bushing is held in place by support blocks in the box The transport box is marked with Top end this identifies the end to l...

Page 15: ...oft lifting 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 G006949 Procedure 1 Make sure that the cranes is approved for lifting the weight of the bushing Refer to the net weight on the packing list 2 Ope...

Page 16: ...G007208 5 Attach a soft lifting sling to the lifting tool 88 on the lower part of the flange and then to the crane hook G006950 6 Attach a soft lifting sling to the top part of the porcelain insulator CAUTION Attach the soft lifting sling as close to the top housing as possible or damage will occur G006951 7 Carefully lift the bushing 8 Make sure that the support blocks are in the same positions a...

Page 17: ...on and commissioning guide 1ZSC000563 AAF EN REV 4 2021 06 23 17 9 Lower the bushing onto the support blocks G006952 10 Remove the soft lifting sling at the top part of the porcelain insulator End of instruction ...

Page 18: ...18 Installation and commissioning guide 1ZSC000563 AAF EN REV 4 2021 06 23 ...

Page 19: ...69 897 A For removal and installation of the draw rod system Box spanner 9760 669 B For removal and installation of the draw rod system 4 2 Consumables Item Brand Hitachi ABB part number Note Oil based Vaseline Fuchs For treatment of contact surfaces Does not react with transformer oil Mobilgrease 28 MOBIL Lubricates and protects metals against corrosion Protects rubber Does not react with transfo...

Page 20: ...on and commissioning guide 1ZSC000563 AAF EN REV 4 2021 06 23 4 3 Preparations 4 3 1 Installation of lifting tools Overview G006953 1 Lifting tool PDV1909 1 85 Lifting yoke PDV1909 4 1 Loosen the M8 bolts 24 G004684 ...

Page 21: ...s 6 and then remove the outer terminal 5 G004691 3 Place the lifting tool lower part 1 around the porcelain NOTE Make sure the rubber protection protect the bushing G006984 4 Close the lifting tool 1 and install the bolts NOTE Align the side of the lifting tool with the oil level guage 26 G006985 ...

Page 22: ...ng the bushing for installation on the transformer Procedure 1 Make sure that the crane can lift the bushing Refer to the net weight in the packing list 2 Align the second crane hook with the lifting tool top part on the bushing 3 Attach soft lifting slings 8 from the lifting holes through the lifting tool top part to the second crane hook NOTE The first crane is still attached to the flange lifti...

Page 23: ...e bushing is in a vertical position 2 Remove the lower soft lifting slings to the crane 3 Remove the flange lifting tool 88 CAUTION Do not let the bushing come in contact with the floor while raising the bushing to a vertical position Contact with the floor can cause damage to the bushing G007350 6 Lift the bushing to a position above the transformer CAUTION Make sure that the bushing does not rot...

Page 24: ...ng Overview The bottom contact is usually installed in the bushing when it is delivered from Hitachi ABB Power Grids the first step at the transformer factory is thus to remove it G006959 4 Lower draw rod 33 Bushing 35 Upper draw rod 36 Bottom contact 39 Lower joint Procedure 1 Install the shaft 37 of the hydraulic jack on the draw rod 35 and put the box spanner 13 on the shaft 37 G004873 ...

Page 25: ... nut is loosened NOTE Use the 76 mm centering ring 68 on the hydraulic jack 38 G005147 4 Loosen the draw rod nut 10 1 Pull the draw rod with 40 kN 2 Carefully increase the force until the draw rod nut can be loosened by hand use the box spanner 13 If 45 kN is reached and the draw rod nut is not loose turn the box spanner with a wrench Refer to the instructions for the hydraulic jack DANGER Apply t...

Page 26: ...move the shaft socket from the upper draw rod 35 7 Remove the hydraulic jack 38 from the bushing G005068 8 Apply Molykote Multilub to the threads on the pull through cord 12 then connect it to the upper draw rod NOTE The terminal on the pull through cord 12 has M8 threads NOTE Or use a lubricant with equal properties to Molykote Multilub G006960 ...

Page 27: ...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 guiding cone 62 is loose G005033 11 Carefully look for damage at the bottom end of the bushing and the inside of the center hole End of instruction 4 4 2 Installation of the smal...

Page 28: ...8 to the bottom end of the bushing G005016 Torque 40 Nm 2 Put the winding cables through the end shield G005024 3 Install the winding cables to the bottom contact CAUTION Make sure that there is no tension in the winding cables Tension in the winding cables will cause damage to the draw rod or cables G005036 Torque 68 6 Nm 4 Lift the bushing above the opening in the transformer ...

Page 29: ...nd 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 refer to Installation of the small bottom contact in the transformer page 27 G005017 41 Large bottom contact Procedure 1 Install the springs 15 the guiding sleeves 16 the pressing ring 17 and the hex screws 18 t...

Page 30: ...ension in the winding cables will cause damage to the draw rod or cables G005019 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 G005037 4 Lift the bushing above the opening on the transformer End of instruction ...

Page 31: ...erview It is important to install the draw rod correctly thus the ends of the draw rod parts must make contact at 67 G006788 CAUTION Do not disassemble the joints 52 these are correctly assembled and locked with tread locking fluid by Hitachi ABB Power Grids Procedure 1 Connect the upper draw rod 35 to the lower draw rod 4 G005038 ...

Page 32: ...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 G005039 4 Hold the pull through cord 12 in tension while lowering the bushing into the transformer CAUTION Do not damage the stud bolts on the t...

Page 33: ...aw 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 CAUTION Make sure that the centering ring 28 is in position It is necessary for the correct installation of the draw rod G006965 7 Tighten th...

Page 34: ...od nut refer to Hydraulic tightening of the draw rod nut page 45 End of instruction 4 4 5 Installation of the bushing with the fixed bottom contact Overview This procedure is only applicable for bushings with a fixed bottom contact The fixed bottom contact is installed when it is delivered from Hitachi ABB Power Grids CAUTION Do not remove the fixed bottom contact G007609 36 Fixed bottom contact ...

Page 35: ...sleeves put on two or three of the stud bolts will help to guide the flange and will prevent damage to the stud bolts G007618 2 Install the winding cables to the fixed bottom contact CAUTION Make sure that there is no tension in the winding cables Tension in the winding cables will cause damage to the cables G007610 3 Install the washers and nuts Tighten the nuts in a crosswise sequence G006964 To...

Page 36: ... 23 4 Remove the bolts 6 the washers 7 and the lifting tool 1 G006956 End of instruction 4 5 Installation at site 4 5 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 G004532 ...

Page 37: ... remove the outer terminal 5 G004691 3 Install the lifting tool 1 refer to Installation of lifting tools page 20 1 Place the lifting tool around the porcelain 2 Close the lifting tool 3 Install the bolts 4 Install the lifting tool 1 the M10 bolts 6 and the washers 7 Align the side of the lifting tool with the oil level guage 26 G006956 Torque 40 4 Nm ...

Page 38: ...0 6 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 G006960 7 Remove the M16 nut 10 and washer G006961 8 With a soft cloth carefully clean the bottom end of the bushing and the inside of the center hole Look for damage ...

Page 39: ...llation opening on the transformer End of instruction 4 5 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 If the bottom contact is removed from the lower draw rod 4 apply locking fluid on the threads 56 Make sure that the guiding cone 62 is in position CAUTION Make sure that all joints in the draw rod are locked wit...

Page 40: ...ed distance H and keep it with the substation documentation refer to Measurement record page 83 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 G006282 4 If the bushing has the small bottom contact then install the end shield 1 Push the end shield carefully...

Page 41: ...Make sure that the nuts are tightened evenly First tighten all nuts to half the torque then to the full torque G006964 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 draw rod tighten with your fingers 3 Remove excess Molykote M...

Page 42: ...NOTE Make sure that more than 10 mm of the threads on the upper draw rod 35 is remaining G006969 Torque 10 Nm 9 Remove the bolts 6 washers 7 and lifting tool 1 G006956 10 Remove the pull through cord 12 11 Tighten the draw rod nut refer to Hydraulic tightening of the draw rod nut page 45 End of instruction ...

Page 43: ...act is installed when it is delivered from Hitachi ABB Power Grids CAUTION Do not remove the fixed bottom contact G007609 36 Fixed bottom contact Procedure 1 Lower the bushing into the transformer CAUTION Do not damage the stud bolts on the transformer There is a risk of metal falling into the transformer NOTE Plastic sleeves put on two or three of the stud bolts will help to guide the flange and ...

Page 44: ...ake sure that there is no tension in the winding cables Tension in the winding cables will cause damage to the cables G007610 3 Install the washers and nuts Tighten the nuts in a crosswise sequence G006964 Torque Please refer to the transformer documentation 4 Remove the bolts 6 the washers 7 and the lifting tool 1 G006956 End of instruction ...

Page 45: ...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 83 for future reference G006970 ...

Page 46: ...6 4 Put the hydraulic jack 38 on the shaft 37 and install the nut 44 tighten by hand NOTE Use the 76 mm centering ring 68 on the hydraulic jack 38 G005147 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 ...

Page 47: ...rod 35 9 Remove the hydraulic jack 38 from the bushing G005068 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 83 for future reference Type Extension GOE 2600 24 0 mm 2 0 G006971 ...

Page 48: ...0563 AAF EN REV 4 2021 06 23 11 When installing the bushing at site 1 Measure the values X1 and c 2 Record the values in Measurement record page 83 for future reference Keep the document with the substation documentation G006758 End of instruction ...

Page 49: ...oil level is maximum 30 mm from the lower side of the bushing flange CAUTION A lower oil level will reduce the electrical insulation G006972 End of instruction 4 8 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 2...

Page 50: ...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 Vaseline 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 G007351 3 Assemble the tightening ring 48 the O ring 3 and the outer te...

Page 51: ... crosswise 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 G003053 Torque 40 4 Nm 9 Tighten the M8 bolts 24 in a crosswise sequence G004684 Torque 20 2 Nm 10 Install the external connection Refer to the documentation from the supplier of the external connection End of instru...

Page 52: ...Procedure with a flexible cable 1 Clean the contact surfaces 2 Put a flexible cable 64 between the grounding hole in the bushing flange and a grounding point on the transformer G006973 3 Apply a large quantity of Mobilgrease 28 to the bolt 50 CAUTION The quality of the bolt is important stainless steel of A4 80 quality is recommended NOTE Or use a lubricant similar to Mobilgrease 28 4 Install the ...

Page 53: ... 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 54: ...led with chalk or paper strips 5 2 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...

Page 55: ...ed bushing because it has an insulated test tap Refer to 2750 515 142 Bushing diagnostics and conditioning 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 importan...

Page 56: ...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 57: ...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 58: ...bushing can only be measured from the outer terminal of one bushing to the outer 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 Procedure 1 Record the temperature of the transformer win...

Page 59: ...fore you do work on it 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 dangerous to persons and the environ...

Page 60: ...tly 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 supervision After repairs Hitachi ABB Power Grids recommends that the capacitance is measured after repairs have been done after maintenance of connected equipment or after work near the bushing is completed It is impor...

Page 61: ...bove 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 Hitachi ABB Power Grids 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 62: ...e oil plug 9 with a large quantity of kinetic energy and cause personal injury DANGER Risk of explosion Do 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 tr...

Page 63: ... the oil valve 51 on the flange NOTE The thread on the oil valve is R BSPT 3 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 G007205 4 Check the oil level If the oil level is low refer to Checking the oil level page 61 CAUTION The oil level must be above the red area 29 NOTE It is generally not necessary to fill the bushing wit...

Page 64: ...ore 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 can cause damage to the bushing End of instruction ...

Page 65: ...e box spanner 13 NOTE The terminal on the pull through cord 12 has M8 threads NOTE Hitachi ABB Power Grids 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 24 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 NO...

Page 66: ... 4 2021 06 23 4 Remove the M16 nut 10 on the draw rod with the box spanner 13 G006961 5 Remove the nuts and washers G006964 6 Lift the bushing from the transformer CAUTION Do not damage the stud bolts there is a risk of metal falling into the transformer G007251 ...

Page 67: ... guiding cone 62 is loose G005033 8 Pull up the draw rod and install the washer 11 and nut 10 CAUTION Make sure that the centering ring 28 is in position it is necessary for the correct installation of the draw rod G006965 9 Remove the pull through cord 12 10 Lift the bushing to a position above the floor and turn the bushing to a horizontal position 1 Install the lifting tool 88 to the flange 2 I...

Page 68: ...s 80 by hand CAUTION Be careful when pulling out the draw rod The bushings inside can easily be damaged G007311 14 Install the lower draw rod 4 in the transport cover 45 G004681 15 Install the transport cover 45 on the transformer turret 46 End of instruction 7 2 Removal of the bushing from the transformer fixed bottom contact Overview This procedure is only applicable for bushings with a fixed bo...

Page 69: ... 4 2021 06 23 69 2 Remove the nuts and washers G006964 3 Remove the winding cables from the fixed bottom contact G007610 4 Lift the bushing from the transformer CAUTION Do not damage the stud bolts there is a risk of metal falling into the transformer G007251 ...

Page 70: ...r part of the bushing Stop when the bushing is in a horizontal position CAUTION Do not let the bushing come in contact with the floor while lowering the bushing to a horizontal position Contact with the floor can cause damage to the bushing G007209 6 Lower the bushing to the floor CAUTION Make sure that there are support blocks on the floor 7 Remove the lifting tool refer to Installation of liftin...

Page 71: ...reads on the draw rod will scratch the inside of the center tube 2 Put plastic wrap on the upper draw rod and the support tubes 3 Lift the bushing Refer to Lifting the bushing out of the transport box page 15 4 Lower the bushing into the transport box CAUTION Make sure that the support blocks are in the correct positions in the transport box CAUTION Make sure that the oil valve and test tap does n...

Page 72: ... tool 88 G007208 6 Attach the bushing to the transport box in the same way as when it was delivered CAUTION Make sure that the bushing cannot move or rotate in the transport box 7 Close the transport box NOTE Refer to Lifting the transport box page 14 and Transportation page 13 End of instruction ...

Page 73: ...amaged we recommend that it is returned to Hitachi ABB Power Grids for repairs and re testing Some parts that are damaged or lost during transportation or installation can be ordered from Hitachi ABB Power Grids 8 2 Spare parts Cover For the test tap Position Part Article number Note 3 O ring 1ZSC004442 CAK 58 Cover 1ZSC004579 AAA G006917 ...

Page 74: ... plug 2522 731 A Position Part Article number Note 9 Oil plug 2121 738 18 77 Gasket 1ZSC001591 AAC G006193 Cover for oil plug 2522 731 A This cover gives protection to the oil plug 2522 731 A Position Part Article number Note 58 Cover 2522 732 42 M24 66 Gasket 2152 795 67 G006277 ...

Page 75: ...ning guide 1ZSC000563 AAF EN REV 4 2021 06 23 75 8 3 Special tools Lifting tool Position Part Article number Note 1 Lifting tool PDV1909 1 86 Tie bolts G006979 Position Part Article number Note 88 Lifting tool PDV1909 2 G007206 ...

Page 76: ...ssioning guide 1ZSC000563 AAF EN REV 4 2021 06 23 Position Part Article number Note 85 Lifting yoke PDV1909 4 G007190 Pull through cord Position Part Article number Note 12 Pull through cord 9760 669 A With M8 terminal G006918 ...

Page 77: ...63 AAF EN REV 4 2021 06 23 77 Hydraulic jack Position Part Article number Note 38 Hydraulic jack 9769 897 A For removal and installation of the draw rod system G006919 Box spanner Position Part Article number Note 13 Box spanner 9760 669 B G006920 ...

Page 78: ...78 Installation and commissioning guide 1ZSC000563 AAF EN REV 4 2021 06 23 ...

Page 79: ...ycled varies depending on the technical resources and capabilities in each country Non recyclable components 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...

Page 80: ...ferent types 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 ...

Page 81: ...6 23 81 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 Ed 2020 Type A TVAI ...

Page 82: ...82 Installation and commissioning guide 1ZSC000563 AAF EN REV 4 2021 06 23 ...

Page 83: ... 23 83 11 Appendix 11 1 Measurement record Overview Record the final measurements of the draw rod Record Serial number Date Operator G007207 Ø mm 1 H mm a mm 2 b mm 3 c mm X1 mm 1 Thread diameter 2 Draw rod nut tightened with 10 Nm 3 After hydraulic tightening Comments ...

Page 84: ...onents SE 771 80 Ludvika Sweden www hitachiabb powergrids com transformer insulation components Copyright 2021 Hitachi ABB Power Grids All rights reserved Specifications subject to change without notice 1ZSC000563 AAF EN REV 4 2021 06 23 ...

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