OILTAP® R Maintenance Manual PDF

EN  Table of contents Table of contents 1 Spare parts list................................................................................................

EN  Table of contents Table of contents 1 Spare parts list.................................................................................................................... 5 1.1 Figure list - OILTAP® R, OILTAP® T................................................................................................. 6 1.1.1 Spare parts list - OILTAP® R, OILTAP® T........................................................................................................... 7 2 Step-by-Step..................................................................................................................... 10 2.1 Introduction....................................................................................................................................... 10 2.2 Tests and condition-based parts replacement at each maintenance............................................... 10 2.2.1 Checking de-energized tap-change supervisory control..................................................................................... 10 2.2.2 Checking shielding rings (mounting tabs) (Um > 170 kV)................................................................................... 13 2.2.3 Check of latching condition................................................................................................................................. 17 2.2.4 Marking and installing guide rods........................................................................................................................ 19 2.2.5 Wear of and clearances of guide rods and sleeves............................................................................................ 19 2.2.6 Setting remaining stroke..................................................................................................................................... 20 2.2.7 Measurement of additional distance................................................................................................................... 23 2.2.8 Setting additional distance.................................................................................................................................. 25 2.2.9 Replacement of final locking device rollers......................................................................................................... 28 2.2.10 Checking eccentric cam...................................................................................................................................... 32 2.2.11 Checking the needle roller bearing..................................................................................................................... 36 2.2.12 Checking installation positions of partition walls................................................................................................. 39 2.2.13 Checking wear on moving main contact............................................................................................................. 41 2.2.14 Guide plate - Checking wear............................................................................................................................... 44 2.2.15 Oil compartment contacts - Checking cylindrical pins......................................................................................... 45 2.2.16 Calculating contact wear..................................................................................................................................... 49 2.2.17 Max. permitted contact wear............................................................................................................................... 60 2.2.18 Checking transverse insulation of moving arcing contacts of diverter switch insert............................................ 62 2.3 Parts replacement after fixed number of tap-change operations intervals....................................... 63 2.3.1 Parts replacement at 100,000 operations........................................................................................................... 63 2.3.2 Parts replacement at 150,000 operations........................................................................................................... 74 2.3.3 Parts replacement at 200,000 operations........................................................................................................... 75 2.3.4 Parts replacement at 400,000 operations........................................................................................................... 90 2.4 One-time retrofit and modifications................................................................................................... 92 2.4.1 Until 31 October, 1999 Retrofit of final locking device........................................................................................ 92 2.4.2 Up to 31 December, 2003 - Additional locking of supporting cylinder attachment.............................................. 96 2.4.3 Up to 31 October, 2006 - Replacement of tap selector drive shaft..................................................................... 99 2.4.4 Up to 31 December, 2005 - Retrofit touch-proof plug connector for tap-change supervisory control................. 99 2 EN Table of contents 2.4.5 Until 1 June, 2007 - Retrofitting of potential tie-in in unequipped sectors......................................................... 120 2.4.6 Up to 31 August, 2007 - Attaching lead D to contact shell................................................................................ 127 2.4.7 Up to 14 September, 2020 - Replacement of shielding rings on coupling shaft............................................... 130 3 Assemblies...................................................................................................................... 139 3.1 Introduction..................................................................................................................................... 139 3.2 General........................................................................................................................................... 139 3.2.1 Replacement intervals diverter switch insert, selector switch insert, diverter switch oil compartment contacts and on-load tap-changer.......................................................................................................................................... 139 3.2.2 Checking de-energized tap-change supervisory control................................................................................... 143 3.2.3 Until 1 June, 2007 - Retrofitting of potential tie-in in unequipped sectors......................................................... 145 3.2.4 Check of latching condition............................................................................................................................... 152 3.2.5 Drawings........................................................................................................................................................... 154 3.2.6 Up to 31 December, 2005 - Retrofit touch-proof plug connector for tap-change supervisory control............... 155 3.2.7 Replacement of type-R DSI with type-VR DSI.................................................................................................. 155 3.3 Contact system, switching element................................................................................................ 163 3.3.1 Replacement of resistor connecting leads A, B, C, E (200,000 operations)..................................................... 163 3.3.2 Replacement of resistor connecting leads D (100,000 operations).................................................................. 168 3.3.3 Checking installation positions of partition walls............................................................................................... 179 3.3.4 Checking wear on moving main contact........................................................................................................... 180 3.3.5 Material for contact replacement....................................................................................................................... 184 3.3.6 Replacement of contact heads.......................................................................................................................... 184 3.3.7 Determining values K in SAP............................................................................................................................ 187 3.3.8 Wear prognosis using software tool.................................................................................................................. 189 3.3.9 Conditions fro calculation.................................................................................................................................. 195 3.3.10 Checking installation positions of partition walls............................................................................................... 197 3.3.11 Distance contact bridge (distance S)................................................................................................................ 198 3.3.12 Guide plate - Checking wear............................................................................................................................. 200 3.3.13 Max. permitted contact wear............................................................................................................................. 203 3.3.14 Calculating contact wear................................................................................................................................... 205 3.3.15 Wear adjustment by interchanging contacts pairwise with each other.............................................................. 216 3.3.16 Up to 31 August, 2007 - Attaching lead D to contact shell................................................................................ 217 3.3.17 Checking transverse insulation of moving arcing contacts of diverter switch insert.......................................... 221 3.3.18 Inspection notes for R and T tap changers with little diverter switch contact wear........................................... 222 3.3.19 Checking wear on moving main contact........................................................................................................... 223 3.4 Energy accumulator, gearbox......................................................................................................... 227 3.4.1 Marking and installing guide rods...................................................................................................................... 227 3.4.2 Wear of and clearances of guide rods and sleeves.......................................................................................... 227 EN 3  Table of contents 3.4.3 Setting remaining stroke................................................................................................................................... 228 3.4.4 Replacement of final locking device rollers....................................................................................................... 231 3.4.5 Checking eccentric cam until delivery date 31 October, 2006.......................................................................... 235 3.4.6 Checking eccentric cam from delivery date 1 November, 2006........................................................................ 236 3.4.7 Removal of final locking device......................................................................................................................... 238 3.4.8 Replacement of energy accumulator (with final locking device)....................................................................... 239 3.4.9 Replacement of needle roller bearing............................................................................................................... 239 3.4.10 Measurement of additional distance................................................................................................................. 249 3.4.11 Setting additional distance................................................................................................................................ 251 3.4.12 Replacement of final locking device rollers....................................................................................................... 253 3.4.13 Checking eccentric cam.................................................................................................................................... 258 3.4.14 Checking the needle roller bearing................................................................................................................... 262 3.4.15 Until 31 October, 1999 Retrofit of final locking device...................................................................................... 265 3.5 Supporting cylinder/supporting bars, coupling shaft, switching column.......................................... 269 3.5.1 Checking shielding rings (mounting tabs) (Um > 170 kV)................................................................................. 269 3.5.2 Up to 31 December, 2003 - Additional locking of supporting cylinder attachment............................................ 273 3.5.3 Up to 31 December, 2005 - Retrofit touch-proof plug connector for tap-change supervisory control............... 277 3.5.4 Up to 31 October, 2006 - Replacement of tap selector drive shaft................................................................... 291 3.5.5 Up to 14 September, 2020 - Replacement of shielding rings on coupling shaft............................................... 291 3.6 Transition impedance and protective circuit................................................................................... 299 3.6.1 Check of voltage-dependent resistors............................................................................................................... 299 3.7 Oil compartment............................................................................................................................. 314 3.7.1 Replacement of oil compartment contacts by means of a device..................................................................... 314 3.7.2 Indication gear - Replacement by means of a device....................................................................................... 324 3.7.3 Oil compartment contacts - Checking cylindrical pins....................................................................................... 341 3.7.4 Additional information........................................................................................................................................ 343 4 EN 1 Spare parts list 1 Spare parts list EN 5  1 Spare parts list 1.1 Figure list - OILTAP® R, OILTAP® T 6 EN  Spare parts for OLTCs Date: 24.03.2020 Types T & R Doc.: T97001.xls Pictures of parts Designation units Part no. Remarks O ring 1 860258 Gasket between OLTC head and oil compartment 1 590584:01 up to 2/94 3x466x422 flange (bell-type tank) O ring between OLTC head and oil compartment 1 860168:00 from 3/94 on 448-6 flange (bell-type tank) Gasket between OLTC head and transformer 1 590037 4mm Perbunan cover 1 set consisting of: 1 bleeding screw 1 401823:00 1 sealing ring 1 401824:00 1 cap nut 1 401822:01 1 sealing ring 1 401825:00 (2 sets per OLTC) 1 set of small parts 092671:11 Resistor carrier 200102:02 Guide piece (main contact) 1 200091:02 Lock nut 2 453978:01 Star-point contact holder, left and right 3 092174:03 Main contact holder 1 092175:03 Main contact holder 1 092176:03 Flexible leads 1 092696:05 per sector Solid connecting leads 2 098050:00 length = 500 mm Solid connecting leads 2 098051:00 length = 395 mm Solid connecting leads 2 098052:00 length = 295 mm Sealing ring für upper gear unit (eccentric) 1 860257 top 150 x 4 Sealing ring für upper gear unit (eccentric) 1 860249 bottom 144 x 4 Sealing ring für upper gear unit (centrical) 2 860088 Sealing ring for upper gear unit cover (centrical) 1 400303:02 Locking plate 2 057971:00 Shaft 1 076719:00 up to 12/89 small side to eccentric cam For this documentation we reserve all rights according to standard DIN 34, section 2.1. Page 1 of 3  Spare parts for OLTCs Date: 24.03.2020 Types T & R Doc.: T97001.xls Pictures of parts Designation units Part no. Remarks Energy accumulator complete (≥400.000) 1 706303:00 load with SETERSATZ Excentric with cam (with final locking device new) 727855:00 from 31.10.2006 Cock-up sledge (with final locking device new) 725293:04 from 31.10.2006 Winding sledge (with final locking device new) 725153:00 from 31.10.2006 Guide bolt (14mm for MS-bushing) 711325:00 Check in SAP !! Guide bolt (10mm for MS-bushing) 711324:00 R with final locking device need bigger reversal at the motor drive unit Bearer roller OLD for final locking device: up del. date 31.10.2006 Bearer roller 18 mm 1 701611:03 Check with MR / SAP Bearer roller 18,5 mm 1 713536:01 Bearer roller 19 mm 1 701612:02 Bearer roller 19,5 mm 1 713537:01 Bearer roller 20 mm 1 701613:01 Bearer roller 20,5 mm 1 713538:01 Bearer roller 21 mm 1 701614:02 Bearer roller NEW for final locking device: from del. date 31.10.2006 Bearer roller 17,5 mm 1 738449:01 Bearer roller 18 mm 1 727134:01 Check with MR / SAP Bearer roller 18,5 mm 1 727135:01 Bearer roller 19 mm 1 727136:01 Bearer roller 19,5 mm 1 727137:01 Bearer roller 20 mm 1 727138:01 Bearer roller 20,5 mm 1 727139:01 Bearer roller 21 mm 1 727140:01 Energy accumulator spring for 400.000 Spring R (3 sectors, red) 470N with final locking dev. 2 727012:00 Spring R (3 sectors, red) 470N W/O final locking dev. 2 727012:00 !!! Prior delivery check Spring T B27(3 sectors, yellow/green/yellow) 470N 2 500577:03 already installed Spring T/R (2 sectors, green) 373N 2 550069:02 springs !!! Spring T/R (1 sector, yellow) 221N 2 550068:01 Varistor 8KV QN33 ZnO 1 715007:00 Varistor 7KV RVSG ZnO 1 712691:00 Linear resistor 8 Ohm 1 582924:00 Linear resistor 10 Ohm 1 581918:00 Cable tie 1 400093:00 Tool for cable tie 1 110512:69 Dummy insert 1 091829:01 (without ground insulation) T - OLTC 1 set spare contact movable with accesories: 1 088983:04 1 set for 1 sector 1 set spare contact fixed with accesories: 1 092672:03 1 set for 1 sector Contact brigde (movable) 1 058205:07 Auxiliary resp. switching conatct (fixed) 2 061468:06 For this documentation we reserve all rights according to standard DIN 34, section 2.1. Page 2 of 3  Spare parts for OLTCs Date: 24.03.2020 Types T & R Doc.: T97001.xls Pictures of parts Designation units Part no. Remarks R - OLTC 1 set spare contact movable with accesories: 1 095274:03 1 set spare contact fixed with accesories: 1 712898:01 Contact brigde (movable) 1 7475405 Auxiliary resp. switching conatct (fixed) 2 074738:03 Accesories movable contacts T/R Bearing screw 1 058202:00 Bearing bushing 1 058203:00 Locking plate 2 058298:01 Spring holder 2 058207:02 Leaf spring 2 500080:01 Accesories fixed contacts T/R Locking plate 6,6 x 17,5 1 058200:00 Undelay (switchiung contact) 1 058216:00 Spring-mounted underlay auxiliary contact 1 710139:00 Underlay (aux. not spring-mounted) 1 058226:00 Pressure spring 1 550094 Insolating plug 1 200104:01 Contact tube (aux. conatct not spring-mounted) 1 703310:00 Flexible current strip HK-SK 1 058340:00 Accessory kit for contact Change R/T 1 790879:00 for 3 Sektors Safety nut M6 48 453977:01 Locking plate (for Bearing bushing) 36 058298:01 Bearing screw 18 058202:00 Bearing bushing 18 058203:00 Locking plate 6,6 x 17,5 36 058200:00 Removable glue Delo MR 5249 1 900024:00 Profiled arc chutes R-OLTC Profiled arc chute (outside, 1 catch) 2 200800:00 Profiled arc chute (outside, 3 catch) 2 096486:00 Profiled arc chute (inside, short) 3 072827:00 Profiled arc chute (inside, long) 2 072828:00 Contact head complete 1 704542:00 Tubular rivet 1 400224:00 Operating key existing of: Operating key 1 066765:01 Switching rod 1 066764:00 Contact shell became longe from year 1985 Guide plate of diverter switch 2 200101:10 Circlip 6 452204 Circlip 2 452221 Stud bolt 3 401701 For this documentation we reserve all rights according to standard DIN 34, section 2.1. Page 3 of 3  2 Step-by-Step 2 Step-by-Step 2.1 Introduction NOTICE Risk of personal damage or injury, damage to property or mal- function. If work is performed by insufficiently qualified personnel and/or safety in- structions are not observed, there is a risk of personal damage or injury, damage to property or malfunction. ► Safety, hazard and other information included in the MR operating in- structions for the relevant on-load tap-changer type must be observed! ► Please read the instructions carefully before starting work. ► The realization of the instructions below requires profound knowledge and experience that correspond to the knowledge acquired during a train- ing at MR about maintenance of the relevant on-load tap-changer type. ► It is absolutely necessary that the diverter switch insert (or selector switch insert, respectively) has been removed. 2.2 Tests and condition-based parts replacement at each maintenance 2.2.1 Checking de-energized tap-change supervisory control Before starting work, ensure de-energized tap-change supervisory control. Bushing of tap-change supervisory control Figure 1: Bushing of tap-change supervisory control on on-load tap-changer head 10 EN 2 Step-by-Step 2.2.1.1 De-energized tap-change supervisory control Before starting work, ensure de-energized tap-change supervisory control. Bushing of tap-change supervisory control Figure 2: Bushing of tap-change supervisory control on on-load tap-changer head NOTICE Danger of electric shock This section must be read and followed before removing the on-load tap- changer cover. The following section describes how you can tell without removing the on- load tap-changer cover whether it is a version with tap-change supervisory control and how you can ensure that the tap-change supervisory control is de-energized. NOTICE! If it is a version with tap-change supervisory control, ensure that the tap-change supervisory control is in de-energized condition before re- moving the on-load tap-changer cover! The variant with magnetic switch has been in use since the beginning of 1990. Recognizing the tap-change supervisory control without connection diagram The version with tap-change supervisory control is always clearly recogniz- able by its bushing at the on-load tap-changer head. De-energization of the tap-change supervisory control by the operator NOTICE! The tap-change supervisory control of the on-load tap-changer is connected to terminals in the motor-drive unit. The connection of the supply voltage depends on the connection diagram of the respective motor-drive unit. Ensuring the de-energization of the tap-change supervisory control before removing the on-load tap-changer cover Open the cover of the bushing by loosening of the four bolt connections. EN 11  2 Step-by-Step Cover of bushing Figure 3: Cover of bushing of tap-change supervisory control Ensure de-energized condition by measuring at all connection terminals against ground potential (housing) in AC and DC mode of the digital multi- meter. Figure 4: View of the opened bushing Figure 5: Connection diagram for connection configuration of terminal strips 12 EN 2 Step-by-Step NOTICE! Adjustment position different depending on tap-changer design! 2.2.2 Checking shielding rings (mounting tabs) (Um > 170 kV) For diverter switch inserts with additional, large shielding rings, the shielding rings must be checked at each maintenance; the result must be docu- mented in the service report. Large shielding ring Small shielding ring Figure 6: Coupling shaft with large shielding rings Details - Checking shielding rings (mounting tabs) (Um > 170 kV) For diverter switch inserts with additional, large shielding rings, the shielding rings must be checked at each maintenance; the result must be docu- mented in the service report. Large shielding ring Small shielding ring Figure 7: Coupling shaft with large shielding rings Additional, large shielding rings are installed on the coupling shaft of tap changers with insulation distance over (>) 123 kV. From 14 September, 2020 onward, they are attached in a different manner to the small shielding rings. Check attachment for damage, such as cracks or breaks. EN 13  2 Step-by-Step If any damages are discovered, these must be documented / photographed and sent to [email protected] with the equipment serial number in the subject line. 6 cm Version before 14 September, 2020 Check condition of mounting tab attaching large shielding ring to small shielding ring. Large shielding ring Mounting tab Small shielding ring 6 cm Figure 8: Shielding ring version before 14 September, 2020 Mounting tab Figure 9: Mounting tab version before 14 September, 2020 Examples of known damage pictures: 14 EN 2 Step-by-Step "Cracked": Figure 10: Damage picture 1 "Cracked" Figure 11: Damage picture 2 "Cracked" Figure 12: Damage picture 3 "Cracked" EN 15  2 Step-by-Step "Broken": Figure 13: Damage picture "Broken" "Good": Figure 14: Good condition 6 cm Version from 14 September, 2020 onward Check condition of bolt connection attaching large shielding ring to small shielding ring. Mounting hole Small shielding ring Figure 15: Shielding ring version from 14 September, 2020 onward 16 EN 2 Step-by-Step 6 cm Bolt connection Large shielding ring Figure 16: Bolt connection attaching large shielding ring to small shielding ring from 14 Septem- ber, 2020, onward 2.2.3 Check of latching condition Check of latching condition Before lifting the diverter switch insert, check if it is in final end position, see picture below. Preliminary locking position Final end position Switching crank Locking pawl Figure 17: DSI in preliminary locking position and final end position Details - Check of latching condition Before lifting the diverter switch insert, check if it is in final end position, see picture below. EN 17  2 Step-by-Step Preliminary locking position Final end position Switching crank Locking pawl Figure 18: DSI in preliminary locking position and final end position Before lifting the diverter switch insert, use operating wrench to move cou- pling shaft of diverter switch insert from position 1 to position 2, see picture below. Position 1 Position 2 Figure 19: Move DSI to position 2 and lift it Position 2 is reached as soon as you feel resistance of the energy accumu- lator spring. This is when the switching crank is in touch with the locking pawl, i.e., the DSI cannot change from preliminary locking position to final locking position when the DSI is lifted; see previous picture "DSI in prelimi- nary locking position and final end position" 18 EN 2 Step-by-Step Remove operating wrench and lift diverter switch insert from position 2. Check latching condition and write it down. See the following table for how to proceed. Latching condi- Further activities tion Final end position Proceed as described in the current maintenance manual, but install DSI in position 2, then turn it to position 1. Preliminary lock- ▪ Measuring contact wear and write values down in contact ing condition sheet ▪ Check slide contacts and main contacts for signs of overheat- ing (contacts discolored?) and current marks, see picture be- low ▪ Contact responsible person and co-ordinate further activities Table 1: Latching condition of diverter switch insert and further activities 2.2.4 Marking and installing guide rods Punch mark guide rods of cocking sledge and wind-up sledge on side A of diverter switch insert. In addition, use identical punch marks at guide rod height of energy accumulator base plate. Mark with one punch mark Mark with two punch marks Figure 20: Mark installation location and position of guide rods on energy accumulator housing and guide pins If the guide rods are removed during maintenance, be sure to re-install them later at the same locations and in the same direction. 2.2.5 Wear of and clearances of guide rods and sleeves Use caliper to measure wear and clearances of guide rods and sleeves of cocking sledge and wind-up sledge and write values down in service report. EN 19  2 Step-by-Step Cocking sledge Wind-up sledge Sleeves Guide rods Figure 21: Guide rods and sleeves The limit values (wear) specified in the following table must not be exceeded or fallen below: Spring energy accumulator Wind-up sledge Cocking sledge Guide rods outer-diameter ≥ 13.5 mm ≥ 9.5 mm Sleeves inner diameter ≤ 14.5 mm ≤ 10.5 mm Table 2: Limit values guide rods and sleeves Part Maximum clearance Sleeves in wind-up sledge strip isolation to 1 mm Sleeves in cocking sledge strip isolation to 1 mm Guide rods in spring energy accumulator housing strip isolation to 1 mm Table 3: Max. clearance of sleeves and guide rods NOTICE! In the delivery period from 1 December, 1998 to 10 May, 2001 sleeves treated with Tenifer 5 (dark silver-gray coloration) were installed in the cocking sledge of the pressure-spring energy accumulator. These sleeves must be replaced during every maintenance. Sleeves delivered outside the specified delivery period need to be replaced only when the specified wear limits are exceeded. 2.2.6 Setting remaining stroke Use caliper to measure remaining stroke on both sides. Remaining stroke must be at least 1 mm. 20 EN 2 Step-by-Step Tripping lever Locking pawl Figure 22: Initial position of pressure-spring energy accumulator Details - Setting remaining stroke Use caliper to measure remaining stroke on both sides. Remaining stroke must be at least 1 mm. Tripping lever Locking pawl Figure 23: Initial position of pressure-spring energy accumulator To set remaining stroke, turn drive shaft on the DSI side that is in the final end position just to the point when the wind-up sledge tripping lever fits flush with the locking pawl on the side to be measured, see previous picture. The locking pawl must not yet be actuated. How to proceed when wind-up sledge is not replaced Use caliper to measure remaining stroke on both sides. To do so, turn drive shaft on the DSI side that is in the final end position just to the point when the wind-up sledge tripping lever fits flush with the locking pawl on the side to be measured. The locking pawl must not yet be actuated. EN 21  2 Step-by-Step Tripping lever Locking pawl Figure 24: Initial position of pressure-spring energy accumulator Then put the caliper to rest on the energy accumulator base plate and mea- sure the gap to the wind-up sledge; write measured value M1 down. Caliper Wind-up sledge Energy accumulator support plate Figure 25: Measuring value M1 While the caliper rests in the same position, operate the pressure-spring en- ergy accumulator over the dead point manually. Then substract value M2 shown on the caliper from value M1. Figure 26: Setting remaining stroke M2 Example: Measured value M1 = 17.2 mm, measured value M2 = 14.6 mm Remaining stroke side A is result of = M1 – M2, remaining stroke = 17.2 mm – 14.6 mm = 2.6 mm 22 EN 2 Step-by-Step Perform measurement on both sides of the diverter switch insert and write the values down in the service report. Wear on block Max. wear on the block must be ≤ 0.6 mm. When servicing diverter switch types OILTAP® R, RM and T, regardless of mode of operation, max. wear value of wind-up sledge block on side A and side B must be measured. Ref A Ref B A1 B1 A2 B2 side A side B Figure 27: Measuring points on block Ref A Reference value A Ref B Reference value B A1, A2 Wear value A1, A2 B1, B2 Wear value B1, B2 Move eccentric to suitable position and measure wear values A1, A2, B1 and B2 and reference values Ref A and Ref B using caliper, see previous picture. Wear is equal to the difference: ▪ Block wear side A: Ref A – A1 and Ref A – A2 ▪ Block wear side B: Ref B – B1 and Ref B – B2 2.2.7 Measurement of additional distance Measuring additional distance of OILTAP® R, RM and T Additional distance must be ≥ 0.7 mm and ≤ 1.5 mm. Use screwdriver to move drive star towards the DSI side that is not in the fi- nal end position. EN 23  2 Step-by-Step Screwdriver Drive star Figure 28: Drive star 2.2.7.1 Details - Measurement of additional distance Measuring additional distance of OILTAP® R, RM and T Additional distance must be ≥ 0.7 mm and ≤ 1.5 mm. Use screwdriver to move drive star towards the DSI side that is not in the fi- nal end position. Screwdriver Drive star Figure 29: Drive star Increase pressure until final locking roller fits flush with eccentric cam so that the roller cannot be turned anymore. Keep this position. Final locking roller Eccentric cam Figure 30: Eccentric cam with final locking roller 24 EN 2 Step-by-Step Measure distance between locking pawl and switching crank using thickness gauge. Switching crank Locking pawl Thickness gauge Figure 31: Latching device Necessary special and auxiliary tools are listed in the table below. Special and auxiliary tools for measuring additional distance Item Quantity Part number Description 10 1 110510:75 Feeler gauge 20 1 63079700 Adjustment device Table 4: Special and auxiliary tools for measuring additional distance The additional distance must be between ≥ 0.7 mm and ≤ 1.5 mm. additional distance Figure 32: Detail drawing latching device 2.2.8 Setting additional distance If the additional distance is not within the required values, replace the final locking rollers to adjust it to the required value. It is allowed to use rollers with different diameters. Details - Setting additional distance When replacing the final locking rollers, pay attention that the final locking device does not block on any side and in any switching direction, that is, it must still be possible to move the eccentric cam past the final locking roller. EN 25  2 Step-by-Step If desired measure for additional distance cannot be reached by replacing the rollers, first replace guide rods and sleeves (material in accordance with table 3), limiting excessive play in the area of the sleeves and guide rods to a minimum. Next, set correct additional distance by installing suitable rollers. See the following tables for the material needed for setting the additional dis- tance. Delivery date final locking de- Version vice to 31 March, 2001 Nitrided sleeves and guide pins, Final locking rollers with flange 2001-04-01 to 2006-10-31 Golden sleeves, chrome-plated pins, Final locking rollers with flange From 1 November, 2006 onward Golden sleeves, chrome-plated pins, Final locking rollers without flange Table 5: Final locking device variants Material for setting additional distance; delivery date final locking device up to 31 March, 2001 Item Quan- Part number Description tity 10 2 70161103 Roller diameter 18.0 mm 20 2 71353601 Roller diameter 18.5 mm 30 2 70161202 Roller diameter 19.0 mm 40 2 71353701 Roller diameter 19.5 mm 50 2 70161302 Roller diameter 20.0 mm 60 2 71353801 Roller diameter 20.5 mm 70 2 70161402 Roller diameter 21.0 mm 80 2 452203 Retaining ring 90 4 71252903 Sleeve for cocking sledge 100 4 04727901 Sleeve for wind-up sledge 110 2 04778706 Guide rods cocking sledge 120 2 04778905 Guide rods wind-up sledge 130 2 06627400 Washer Table 6: Material for setting additional distance; delivery date final locking device up to 31 March, 2001 26 EN 2 Step-by-Step Material for setting additional distance; delivery date final locking device from 1 April, 2001, to 31 October, 2006 Item Quantity Part number Description 10 2 70161103 Roller diameter 18.0 mm 20 2 71353601 Roller diameter 18.5 mm 30 2 70161202 Roller diameter 19.0 mm 40 2 71353701 Roller diameter 19.5 mm 50 2 70161302 Roller diameter 20.0 mm 60 2 71353801 Roller diameter 20.5 mm 70 2 70161402 Roller diameter 21.0 mm 80 2 452203 Retaining ring 90 2 06627400 Washer Table 7: Material for rollers when delivery date of final locking device is 1 April, 2001 to 31 Octo- ber, 2006 Item Quantity Part number Description 90 4 71132700 Sleeve for cocking sledge 100 4 71132600 Sleeve for wind-up sledge 110 2 71132400 Guide rods cocking sledge 120 2 71132500 Guide rods wind-up sledge 130 2 06627400 Washer Table 8: Material sleeves and guide rods if delivery date of final locking device was from 1 April, 2001, to 31 October, 2006 Material for setting additional distance; delivery date final locking device 1 November, 2006 onward Item Quantity Part number Description 10 2 72713401 Roller diameter 18.0 mm 20 2 72713501 Roller diameter 18.5 mm 30 2 72713601 Roller diameter 19.0 mm 40 2 72713701 Roller diameter 19.5 mm 50 2 72713801 Roller diameter 20.0 mm 60 2 72713901 Roller diameter 20.5 mm 70 2 72714001 Roller diameter 21.0 mm 80 2 452203 Retaining ring 90 2 06627400 Washer Table 9: Material for rollers with a delivery date of final locking device from 1 November, 2006 onward EN 27  2 Step-by-Step Item Quantity Part number Description 100 4 71132700 Sleeve for cocking sledge 110 4 71132600 Sleeve for wind-up sledge 120 2 71132400 Guide rods cocking sledge 130 2 71132500 Guide rods wind-up sledge Table 10: Material sleeves and guide rods if delivery date of final locking device was from 1 No- vember, 2006 onward NOTICE! Final locking device parts of different versions cannot be com- bined. This also applies when the parts' dimensions fit accurately. 2.2.9 Replacement of final locking device rollers The section below describes how to replace rollers of final locking device. Regardless of year of manufacture and operating condition, the rollers of the final locking device must be replaced at each maintenance. Figure 33: Final locking device rollers The rollers that need to be provided and used for maintenance must have identical diameter as the rollers that were delivered originally for the relevant diverter switch insert or subassembly group "energy accumulator with hub"; see lists below. Details - How to replace rollers when delivery date of final locking device is up to 31 October, 2006 The section below describes how to replace rollers of final locking device. Regardless of year of manufacture and operating condition, the rollers of the final locking device must be replaced at each maintenance. 28 EN 2 Step-by-Step Figure 34: Final locking device rollers The rollers that need to be provided and used for maintenance must have identical diameter as the rollers that were delivered originally for the relevant diverter switch insert or subassembly group "energy accumulator with hub"; see lists below. Overview final locking rollers with flange for final locking device variants delivered up to 31 October, 2006. The picture below shows only rollers with outer diameter 18 mm, 19 mm, 20 mm and 21 mm. Figure 35: Rollers with flange Item Quantity Part number Description 10 2 70161103 Roller diameter 18.0 mm 20 2 71353601 Roller diameter 18.5 mm 30 2 70161202 Roller diameter 19.0 mm 40 2 71353701 Roller diameter 19.5 mm 50 2 70161302 Roller diameter 20.0 mm 60 2 71353801 Roller diameter 20.5 mm 70 2 70161402 Roller diameter 21.0 mm 80 2 452203 Retaining ring 90 2 06627400 Washer Table 11: Material for rollers when delivery date of final locking device is 1 April, 2001 to 31 Oc- tober, 2006 EN 29  2 Step-by-Step Checking position of roller if DSI with final locking device was delivered up to 31 October, 2006 The gap between top edge of roller and bottom edge of wind-up sledge riv- ets must be ≥ 2.0 mm. If this value is not reached, contact the responsible OPS immediately. Bottom edge of rivet Top edge of roller Figure 36: Gap between top edge of roller and rivet Details - Roller replacement when delivery date of final locking device is from 1 November, 2006 onward The section below describes how to replace rollers of final locking device. Regardless of year of manufacture and operating condition, the rollers of the final locking device must be replaced at each maintenance. Figure 37: Final locking device rollers The rollers that need to be provided and used for maintenance must have identical diameter as the rollers that were delivered originally for the relevant diverter switch insert or subassembly group "energy accumulator with hub"; see lists below. 30 EN 2 Step-by-Step Overview final locking rollers without flange for final locking device versions supplied from 1 November, 2006 onward The picture below shows only rollers with outer diameter 18 mm, 19 mm, 20 mm and 21 mm. Figure 38: Rollers without flange For deliveries until around May 2005, the responsible OPS must find out the roller diameter from factory specifications or old service reports or ask LSQ. For deliveries from around May 2005, the diameter of the installed rollers is documented in SAP. Item Quantity Part number Description 10 2 72713401 Roller diameter 18.0 mm 20 2 72713501 Roller diameter 18.5 mm 30 2 72713601 Roller diameter 19.0 mm 40 2 72713701 Roller diameter 19.5 mm 50 2 72713801 Roller diameter 20.0 mm 60 2 72713901 Roller diameter 20.5 mm 70 2 72714001 Roller diameter 21.0 mm 80 2 452203 Retaining ring 90 2 06627400 Washer Table 12: Material for rollers with a delivery date of final locking device from 1 November, 2006 onward EN 31  2 Step-by-Step Checking position of roller if DSI with final locking device was delivered from 1 November, 2006 onward The gap between top edge of roller pin and bottom edge of wind-up sledge must be ≥ 3.0 mm. If this value is not reached, contact the responsible OPS immediately. Wind-up sledge Roller pin Figure 39: Gap between roller pin and wind-up sledge 2.2.10 Checking eccentric cam Check vertical position and length of eccentric cam. Figure 40: Eccentric cam For limit values, refer to the relevant section (observe delivery date!). 2.2.10.1 Checking eccentric cam until delivery date 31 October, 2006 Check vertical position and length of eccentric cam. Figure 41: Eccentric cam 32 EN 2 Step-by-Step Final locking roller Top edge final locking roller Top edge of eccentric cam Eccentric cam Figure 42: Eccentric height up to 31 October, 2006 The top edge of the eccentric cam must be 0 – 1.0 mm lower than top edge of final locking roller. If the measure is not reached, vertical position of the eccentric must be ad- justed. Vertical position can be adjusted by installing or removing fitting washers below or on top of eccentric. Eccentric Fitting washers Figure 43: Adjusting eccentric height Fitting washers Selector coupling Figure 44: Drive shaft bearing 2.2.10.1.1 Measurement of eccentric cam if final locking device was delivered up to 31 March, 2001 Measure length of eccentric cam - Measure X - and write value down. EN 33  2 Step-by-Step Measure X Eccentric cam Figure 45: Eccentric with cam and final locking roller For final locking devices delivered up to 31 March, 2001, for OLTC type R and T, value X must be ≥ 25 mm. 2.2.10.1.2 Measurement of eccentric cam if final locking device was delivered from 1 April, 2001 onward Measure length of eccentric cam - Measure X - and write value down. Measure X Eccentric cam Figure 46: Eccentric with cam and final locking roller For final locking devices from delivery date 1 April, 2001 onward, the value must be ≥ 27.5 mm for OLTC type R and T. 2.2.10.2 Checking eccentric cam from delivery date 1 November, 2006 Check vertical position and length of eccentric cam. Figure 47: Eccentric cam 34 EN 2 Step-by-Step The gap between top edge of eccentric cam and top edge of final locking roller must be ≤ ± 0.3 mm. Final locking roller +/- 0.3 mm Top edge final locking roller Top edge of eccentric cam Eccentric cam Figure 48: Eccentric height from 1 November, 2006 onward If the measure is not reached, vertical position of the eccentric must be ad- justed. Vertical position can be adjusted by installing or removing fitting washers below or on top of eccentric. Eccentric Fitting washers Figure 49: Adjusting eccentric height Fitting washers Selector coupling Figure 50: Drive shaft bearing 2.2.10.2.1 Measurement of eccentric cam if final locking device was delivered from 1 April, 2001 onward Measure length of eccentric cam - Measure X - and write value down. EN 35  2 Step-by-Step Measure X Eccentric cam Figure 51: Eccentric with cam and final locking roller For final locking devices from delivery date 1 April, 2001 onward, the value must be ≥ 27.5 mm for OLTC type R and T. 2.2.11 Checking the needle roller bearing When the number of 150,000 tap-change operations or above is reached, the needle roller bearing in the energy accumulator support plate of the di- verter switch insert must be checked6during cm every maintenance. The needle roller bearing can be inspected on the energy accumulator sup- port plate's top. Figure 52: Installation location of needle roller bearing 2.2.11.1 Details - Checking the needle roller bearing When the number of 150,000 tap-change operations or above is reached, the needle roller bearing in the energy accumulator support plate of the di- verter switch insert must be checked during every maintenance. The needle roller bearing can be inspected on the energy accumulator sup- port plate's top. 36 EN 2 Step-by-Step 6 cm Figure 53: Installation location of needle roller bearing How to proceed 6 cm plate Removing energy accumulator support First, make sure that the drive star is in the middle; then remove the energy accumulator support plate (see following figure). Drive star Figure 54: Drive star alignment Remove all retaining rings and washers located above the energy accumula- tor support plate. Then remove three bolts that attach the energy accumulator support plate to the diverter switch insert, and next, remove the plate from the top. EN 37  2 Step-by-Step 6 cm 1 1 1 Retaining ring for washers 6 cmplate Figure 55: Removing energy accumulator support The needle roller bearing can be inspected on the energy accumulator sup- port plate's top. Figure 56: Installation location of needle roller bearing Checking needle roller bearing Check needle roller bearing. If correct function is not ensured or if the needle roller bearing is damaged, e.g., loose needle rollers or cracks in the bearing housing, replace needle roller bearing, as well as drive shaft. The replacement is described in section Replacement of needle roller bear- ing [►Section 2.3.3.1, Page 75]. Installing energy accumulator support plate Reinstall the energy accumulator support plate, performing the described steps in reverse order. Make sure that the disk flywheel roller is located ex- actly in the middle between the two locking pawls. 38 EN 2 Step-by-Step 6 cm Disk flywheel roller Disk flywheel Locking pawl 6 cm Figure 57: Disk flywheel alignment Tighten the bolts to 30 Nm ± 1 Nm. Figure 58: Bolt connection on energy accumulator plate 2.2.12 Checking installation positions of partition walls For work on diverter switches types R or T, make sure to check the correct installation position of partition walls 096486, 072828 and 072827 after rein- stallation. To do so, check on the loosely bolted contact shell 096484, using scriber or small screwdriver, whether guide noses of partition walls in the guide slots of contact shell can be moved. Figure 59: Checking installation position of partition walls EN 39  2 Step-by-Step 2.2.12.1 Details - Checking installation positions of partition walls For work on diverter switches types R or T, make sure to check the correct installation position of partition walls 096486, 072828 and 072827 after rein- stallation. To do so, check on the loosely bolted contact shell 096484, using scriber or small screwdriver, whether guide noses of partition walls in the guide slots of contact shell can be moved. 6 cm Figure 60: Checking installation position of partition walls 096486 072828 072827 4 Figure 61: Position of partition walls If a partition wall is not moveable, loosen the contact shell further and move the partition wall into the recess, using a screwdriver or scriber. If this cannot be achieved, the contact shell must be reinstalled in accor- dance with the current maintenance instructions. This check must be performed on all partition walls in all sectors. 40 EN 2 Step-by-Step 2.2.13 Checking wear on moving main contact Make sure to check clearance of the moving main contacts during every maintenance, and document it in the service report. General notes During maintenance of type OILTAP® R or OILTAP® T diverter switch in- serts, always record the clearance of the moving main contacts, regard- less of type of application (network, power station, HVDC, industrial opera- tion). Diverter switch insert locked on side A Measurement S1: Measurement S2: Push main contact side A back- Pull main contact side A forward ward Exam- 42.2 mm strip isolation to 42.1 mm ple 0.1 mm Table 13: Measurement on diverter switch insert on side A 2.2.13.1 Details - Checking wear on moving main contact Make sure to check clearance of the moving main contacts during every maintenance, and document it in the service report. General notes During maintenance of type OILTAP® R or OILTAP® T diverter switch in- serts, always record the clearance of the moving main contacts, regard- less of type of application (network, power station, HVDC, industrial opera- tion). EN 41  2 Step-by-Step Clearance is the difference obtained by performing two separate measure- ments of the distance between contact shell of diverter switch insert and contact surface of the moving main contact. Push the locked-in, moving main contact manually backward to get measurement S1; then pull it forward to get measurement S2. Measure the distances using a slide gauge; and document the maximum difference of measured values (S1 - S2) in the ser- vice report. The measurement must be performed on both main contacts of all sectors. Performing the measurement Diverter switch insert locked on side A Measurement S1: Measurement S2: Push main contact side A back- Pull main contact side A forward ward Exam- 42.2 mm strip isolation to 42.1 mm ple 0.1 mm Table 14: Measurement on diverter switch insert on side A 42 EN 2 Step-by-Step Diverter switch insert locked on side B Measurement S1: Measurement S2: Push main contact side B back- Pull main contact side B forward ward Exam- strip isolation to 41.6 mm strip isolation to 41.5 mm ple 0.1 mm Table 15: Measurement on diverter switch insert on side B See the following table for how to proceed further. Wear MC Further procedure (Difference S1- S2) [mm] ≤ 0.8 No measures necessary 0.8 < x ≤ 1.3 Replacement of contact system at next maintenance > 1.3 Release for rigid operation, if MC wear is < 1.3 mm in all 3 sectors on one side and the diverter switch is latched onto this side for the rigid operation. Table 16: Decision criteria wear MC type R/T 2.2.13.2 Change log 3 March, 2023 TSC Steindl 1. Adjusting limit values 21 July, 2006 TSC Steindl 1. First publication EN 43  2 Step-by-Step 2.2.14 Guide plate - Checking wear The instructions below describe how to measure wear on the lower guide plate, and the wear values when the lower guide plate should be replaced are specified. Wear measurement and calculation 6 cm A visual check of the lower guide plate is sufficient to find the area of maxi- mum wear. Perform the measurements below (see following figures) only in this area, using a caliper. Measured value 1 Figure 62: Measurement 1: Measured value without wear 2.2.14.1 Details - Guide plate - Checking wear The instructions below describe how to measure wear on the lower guide plate, and the wear values when the lower guide plate should be replaced are specified. Wear measurement and calculation 6 cm A visual check of the lower guide plate is sufficient to find the area of maxi- mum wear. Perform the measurements below (see following figures) only in this area, using a caliper. Measured value 1 Figure 63: Measurement 1: Measured value without wear 44 EN 2 Step-by-Step 6 cm Measured value 2 Figure 64: Measurement 2: Measured value of wear area Wear results from the difference between the two measured values: Wear = Measured value 1 – Measured value 2 Replacement criterion If wear is in the range from 0.8 mm to 1.2 mm, replace the lower guide plate during next maintenance. If wear is more than 1.2 mm, contact the relevant OPS. 2.2.15 Oil compartment contacts - Checking cylindrical pins During every inspection or maintenance, correct seating of all cylindrical pins of the main contact carriers must be checked; and secure them from loosen- ing where necessary. Checking cylindrical pins During every inspection or maintenance, check if the cylindrical pins attach- ing the contacts and spacer plates to the respective main contact carrier are in correct position. Two cylindrical pins per contact carrier are secured by punch mark from be- low during assembly at the factory, to prevent migration to the oil compart- ment base. Use a mirror to check correct seated position of the cylindrical pins on all main contact carriers. In case circular peen marks using a peening tool 63211200 (from June, 2018 onward) were made (see following figure), no further action in terms of the main contact carrier are necessary. EN 45  2 Step-by-Step 6 cm Figure 65: New peen marks on main contact (from June, 2018 onward) 2.2.15.1 Details - Oil compartment contacts - Checking cylindrical pins During every inspection or maintenance, correct seating of all cylindrical pins of the main contact carriers must be checked; and secure them from loosen- ing where necessary. Checking cylindrical pins During every inspection or maintenance, check if the cylindrical pins attach- ing the contacts and spacer plates to the respective main contact carrier are in correct position. Two cylindrical pins per contact carrier are secured by punch mark from be- low during assembly at the factory, to prevent migration to the oil compart- ment base. Use a mirror to check correct seated position of the cylindrical pins on all main contact carriers. 6 cm In case circular peen marks using a peening tool 63211200 (from June, 2018 onward) were made (see following figure), no further action in terms of the main contact carrier are necessary. Figure 66: New peen marks on main contact (from June, 2018 onward) 46 EN 2 Step-by-Step 6 cm If the cylindrical pins have not passed beyond the punch marks (peen marks as of before June, 2018), no action is necessary for the respective main con- tact carrier either. Figure 67: Main contact carrier (view from below) 6 cm If you find that one or more cylindrical pins have migrated from the main con- tact carrier or if they have moved out of their desired position and down- wards, proceed as specified in the following section. Figure 68: Main contact carrier (view from below) Corrective action Punch marks have to be provided on the carrier if one or both cylindrical pins of a main contact carrier have migrated moved downward past the punch mark or beyond the peen mark. Remove the carrier if necessary. Next, install the cylindrical pins in their correct position using a pin punch (as far as the cylindrical pin will go in the opposite blind hole). If spacer plates were moved because of a migrated cylindrical pin, move the spacer plate until the cylin- drical pin can be installed correctly through the hole provided for the pur- pose. EN 47  2 Step-by-Step 6 cm Use punch mark to displace material, reducing the size of the hole. Repeat this step for all carrier holes. Figure 69: New punch marks for locking the cylindrical pins The tightening torque for the M10 x 25 bolts during installation of the MC carriers / neutral point contact carrier is max torque = 38 Nm. Write down execution of work in the service report. 48 EN 2 Step-by-Step 2.2.16 Calculating contact wear EN 49 Diverter switch type R/RM and T Determination of the contact wear R_T05022e.doc TCS-Steindl 12th January 2006 Page 1/1 The contact wear value is the difference between the values measured at MR assembly prior to delivery (“K values”) and the values measured during an OLTC-maintenance (“X values”). The measured values of the contact wear are entered in the so-called “contact wear sheet”. This contact wear sheet has been modified three times up to now. Depending on the contact wear sheet being used the procedure of determining the contact wear value is as follows: 1. When the “K values” are indicated in former versions of the contact wear sheet (see attachments 2, 3, 5 and 5.1) please consider the following: In the past the “K values” were at the MR assembly always first measured and recorded in the adjustment position of the on-load tap-changer – disregarding if the adjustment position was on side A or side B. Consequently it is necessary to assign first the recorded “K values” to the correct side A or side B. The adjustment position of the on-load tap-changer is indicated in the respective adjustment diagram, see attachments 2 to 5.1. for examples. Considering the wide range of the “K values” the standard value K = 34 mm is only to be applied if the contact wear sheet is missing. 2. In the current contact wear sheet version - showed in attachment 1 – each “K value” is clearly assigned either to side A or B of the diverter switch insert. Thus the contact wear can be determined without error. Attachments 1, 2, 3, 3.2, 5 and 5.1 Contact wear sheets filled in at MR assembly Attachment 3.1 Adjustment position on side B, determining the adjustment position on the basis of the adjustment plan. Attachment 3.3 Adjustment position on side A, determining the adjustment position on the basis of the adjustment plan. Attachment 4 Determination of the contact wear on the basis of the “K values” and the values measured during maintenance (“X values”). Attachment 5 Example : Adjustment position on side B Attachment 5.1 Example: Adjustment position on side A Copies to: TK, TS,TCS,TS-SB, TS Manual, TS Representatives, MR Subsidiaries The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration. F00788:01  2 Step-by-Step 2.2.17 Max. permitted contact wear 60 EN  Maximum admissible contact wear (Summary) Replacement for document TCS06004en TCS06004 is replaced owing to the correction for V200 14pitches CST09001en.xls CST1 Suw 10.12.2009 Page 1/1 OLTC type Dimensions of the contacts in mm, Max. admissible or OLTC-dependent reference dimension in mm contact wear Additional wear criterions Entry in with diverter switch inserts type G 22000, R, T in mm SAP documentation as New condition minimum residual value (individual wear) movable fixed movable fixed SC TC SC TC SC TC SC TC SC RC TC A 25 Ø 25 Ø - - 23 Ø 23 Ø - - 2Ø 2Ø none diameter B 5-6 4,5-6 - - 2 1,5 - - 3 3 none individual wear C250 5-6 4,5-6 ∗ ∗ 2 1,5 - - 3 3 none individual wear C350 18,5 18 ∗ ∗ 10,5 10 - - 8 8 none individual wear bis bis 19,5 19,5 V200 - except 22 Ø 22Ø - - 16 Ø 16 Ø - - 6Ø 6Ø none diameter with 14 pitches V200 14 pitches 22 Ø 20 Ø - - 16 Ø 16 Ø - - 6Ø 4Ø none diameter V350/500/ 22 Ø 22 Ø - - 17 Ø 17 Ø - - 5Ø 5Ø see V__09001.doc (TS Manual) diameter 700 - except with 14 pitches V350/700 14 pit. 22 Ø 20 Ø - - 17 Ø 17 Ø - - 5Ø 3Ø see V__09001.doc (TS Manual) diameter SAP document.: individual wear M 8 8 8 8 4 4 4 4 4 4 see TS284043.1 (TS Manual) addit. cont. sheet: indivi. wear D 20000 2 4 11 10 0,5 2 9,5 8 1,5 2 none individual wear oder 2,5 4 11,5 10 0,5 2 9,5 8 2 2,5 D 21000 8,5 8,5 11,5 11,5 3,5 3,5 6,5 6,5 5 5 see TS282034 (TS Manual) individual wear D 0466 6 6 6 6 1 1 1 1 5 5 see TCS05011.doc individual wear D 0444, 6 6 6 6