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Baur PD-TaD 80 Скачать руководство пользователя страница 52

Partial discharge measurement

PD-TaD 80

52 / 74

822-188-3

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For information on calibrating the PD test circuit and performing PD

testing, refer to the user manual for the BAUR software 4.



For information on operating the cable test van or VLF HV

generator, refer to the user manual for the cable test van or the
respective VLF HV generator.

8

P

ARTIAL DISCHARGE MEASUREMENT

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Содержание PD-TaD 80

Страница 1: ... i s e n s t r 8 6 8 3 2 S u l z A u s t r i a T 4 3 5 5 2 2 4 9 4 1 0 F 4 3 5 5 2 2 4 9 4 1 3 w w w b a u r e u h e a d o f f i c e b a u r a t User manual Portable PD diagnostics system PD TaD 80 phd The figure is illustrative ...

Страница 2: ... in an amended format is allowed only with prior written permission of BAUR GmbH 6832 Sulz Austria We reserve the right in the interests of our customers to make amendments as a result of further technical development Illustrations descriptions and scope of supply are therefore not binding The names of products and companies are the trademarks or brand names of the relevant companies ...

Страница 3: ...Special personal protective equipment 13 3 Product information 14 3 1 Available methods 14 3 2 Full illustration of the PD TaD and system components PD TaD 80 as a standalone system 15 3 3 PD TaD 16 3 4 Power Box PD TaD 80 as a standalone system 18 3 5 HF filter 19 3 6 Connection set 19 3 6 1 Calibrator 20 3 6 2 Connection cables 22 3 7 Mounting bracket 25 3 8 Power supply 25 3 9 Markings on the P...

Страница 4: ...ting the HF filter to the PD TaD 80 48 6 12 1 Connecting the HF filter without a connection piece 48 6 12 2 Connecting the HF filter with a connection piece 48 6 12 3 Connection with an HV connection cable with MC plug 49 6 13 Connecting the system to the supply voltage 49 6 14 Securing the test area 50 7 Preparing a measurement 51 7 1 Switching on the system and starting the BAUR software 51 7 2 ...

Страница 5: ... Faults and corrective measures 63 15 1 Malfunction and error messages 63 16 Transportation and storage 64 16 1 Transportation 64 16 2 Storage 65 17 Warranty and After Sales 65 18 Disposal 66 19 Delivery scope and options 66 20 Declaration of conformity 67 21 Glossary 68 22 Index 70 ...

Страница 6: ... conjunction with the following documents User manual for the BAUR software 4 User manual for the VLF HV generator used User manual for the cable test van and applicable user manuals when the PD TaD 80 is integrated in the cable test van 1 3 Structure of safety instructions The safety instructions in this user manual are presented as follows Danger symbol SIGNAL WORD Type of danger and its source ...

Страница 7: ...ymbols General danger Risk of electric shock 1 4 View Settings Symbol Meaning You are requested to perform an action 1 2 Perform the actions in this sequence a b If an operation consists of several operating steps they are specified with a b c Perform the operating steps in this sequence 1 2 Numbering in the legend List Indicates further information on the topic Indicates tools required for the su...

Страница 8: ...t this manual PD TaD 80 8 74 822 188 3 1 5 Note on the screenshots and graphics used The screenshots and graphics used are intended to illustrate the procedure and may differ slightly from the actual state ...

Страница 9: ...LF HV generator for carrying out Partial discharge testing and location VLF cable testing with parallel partial discharge testing Dissipation factor measurement If the system is not used in accordance with this stipulation safe operation cannot be guaranteed The user is liable for any damage to persons and property resulting from incorrect operation Proper use also includes compliance with all ins...

Страница 10: ...l and international standards and guidelines in accordance with the latest applicable version Local safety and accident prevention regulations Operational insurance association regulations if any Only operate the system if it is in a technically safe condition Safety function and availability depend on the proper condition of the system Upgrades modifications or alterations to the system are stric...

Страница 11: ... in environments with explosive gases and in areas with fire risks are not permitted Possible danger zones are e g chemical factories refineries lacquer factories paint shops cleaning plants mills and storage for milled products tank and loading plants for combustible gases liquids and solid matter Lifting and carrying the transport cases To transport the transport cases containing the PD TaD 80 a...

Страница 12: ...urement or test after switching off the device or system the test object can still be live with dangerous voltage Before removing the safety precautions discharge earth and short circuit all live parts DANGER Arcing fault when establishing a connection Danger of burn injuries and electro ophthalmia due to arcing fault Use suitable personal protective equipment to protect against arcing faults Cove...

Страница 13: ... Protection against electrostatic charging crushing slipping and other accidents Safety footwear Protection against electrical hazards arcing fault Certified safety clothing Hard hat with visor Insulating protective gloves LV HRC fuse handle with sleeve Protection against noise Ear protection Protection against dangers from road traffic High visibility vest according to EN 471 Protection class 2 o...

Страница 14: ...la VLF cable testing with parallel partial discharge testing Is used for VLF cable testing Identify and locate PD activities in the cable insulation With this method the cable testing and partial discharge testing are carried out simultaneously PHG 70 PHG 80 PHG 70 portable PHG 80 portable viola Dissipation factor measurement Is used for Evaluation of the dielectric condition of the insulation Ind...

Страница 15: ...splayed analysed and archived in the BAUR Software 2 PD TaD 80 The PD TaD 80 comprises HV coupling unit with integrated measurement impedance Is used to couple out high frequency PD pulses via a measurement impedance in accordance with IEC 60270 and convert them into equivalent voltage signals PD measuring unit Is used to record and process the voltage signals from the HV coupling unit and measure...

Страница 16: ...ports HV IN and HV OUT and the protective earthing for the transportation and storage of the PD TaD 5 Port for the short circuit cable Is used to connect the short circuit cable to the HV ports HV IN and HV OUT Two connection sockets are provided on each of the HV connectors for the short circuit cable on the top and on the side 6 Handles Are used to lift and carry the PD TaD 7 HV OUT HV output Is...

Страница 17: ...g a PoE cable for power supply and data transmission 12 VSE Ports Are used to connect the VSE cable for the dissipation factor measurement to detect and account for leakage current 13 Protective earthing connection Is used to connect the protective earthing 14 Screen HV Cable Port Is used to connect the screen of the HV connection cable Note When the PD TaD 80 is used as a standalone system the HV...

Страница 18: ... protect the Power Box and connected system components Type T 16 AH 3 Laptop port Is used to connect the laptop The laptop is used for data transmission and is connected to the Power Box via the Ethernet cable included in the standard delivery 4 PD Detector port Is used to connect the PD measuring unit of the PD TaD 80 The PD measurement unit is connected to the Power Box via a PoE cable The PoE c...

Страница 19: ... case The illustration shows an example of the connection set in the transport case No Element Function 1 VSE cables Are used for detecting leakage currents during a dissipation factor measurement 2 Guard rings conductible Velcro strips Used for the measurement setup for the dissipation factor measurement for detecting leakage currents 3 Distance pieces for anti corona hood Are used for fitting an...

Страница 20: ...s Data transmission between the PD TaD 80 and the laptop 11 Connection cables Are used to connect the system components and the power supply and for data transmission between the system components Further information Chapter Connection cables on page 22 3 6 1 Calibrator Before you can perform a partial discharge measurement the test circuit must be calibrated to the following parameters Charge in ...

Страница 21: ...sible settings CAL1B 0 10 0 20 0 50 1 00 2 00 5 00 10 00 nC CAL1E 0 50 1 00 2 00 5 00 10 00 20 00 50 00 nC 5 Pos Neg Press briefly to set the polarity of the signal On Off To switch on press briefly To switch off press for approx 3 seconds Note that the calibrator must be removed from the test circuit before switching on the high voltage source Note After some time the calibrator automatically swi...

Страница 22: ...tion cables Used to connect the calibrator to the PD test circuit For the dissipation factor measurement tan δ cable on hand cable drum 50 m 80 m Is used for data transmission during dissipation factor measurements VSE cables with 2 connection clips 2 pcs 1 5 m Are used for the connection between the phases to be tested at the far end on the protective ring and the adjacent de energised phase for ...

Страница 23: ...ltage 90 264 V 47 63 Hz Connection cable C5 C14G 2 5 m Is used for the power supply of the laptop via the Power Box Connection cable C13 C14G 1 8 m Not applicable here Connection cable C19 C20G 2 5 m Is used for the power supply of the VLF HV generator via the Power Box PoE cable 10 m Is used for the power supply of the PD TaD 80 and for data transmission Ethernet cable 3 m Is used to transmit dat...

Страница 24: ...E cables with 2 connection clips 2 pcs 3 m Are used to connect the PD TaD 80 for the dissipation factor measurement for detecting leakage currents Connection between far end of protective ring and adjoining de energised phase as return line VSE cables with Ø 4 mm connector and a connection clip 2 pcs 1 5 m Are used to connect the PD TaD 80 for the dissipation factor measurement for detecting leaka...

Страница 25: ...ed in the PD TaD 80 transport case 3 8 Power supply When the PD TaD 80 is used as a standalone system the power supply for the entire system incl the PD TaD 80 laptop and VLF HV generator is centralised via the Power Box The Power Box is fitted with two fuses for max current 16 A T 16 AH Device Power supply Power Box 90 264 V 47 63 Hz PD TaD 80 PD measuring unit Via Power Box VLF HV generator Via ...

Страница 26: ... plate Element Description Type System designation Nr Serial number U Not applicable here Not applicable here f Not applicable here Coupling and Detector Unit HV coupling unit with PD measuring unit General warning sign Indicates that there is a potential risk of danger when using the product and hence the user manual must be observed CE mark Indicates that the device or system conforms to CE BAUR...

Страница 27: ...PD TaD 80 Technical data 822 188 3 27 74 4 TECHNICAL DATA ...

Страница 28: ...LF HV generator with the main switch on the control panel The operating state of the system is indicated by red and green pilot lamps on the control panel of the VLF HV generator Switch on the laptop and start the BAUR system software 5 1 1 Operating states Out of operation Prerequisites All safety measures necessary before stepping into the test area have been met All power supplies signal and co...

Страница 29: ... red indicator light comes on 5 2 Switching off the system following faults or in emergencies In the event of a fault or an emergency immediately press the emergency off button Pressing the emergency off button puts the system in the safe Ready for operation operating state Follow the user manual for the cable test van or the VLF HV generator 5 3 Managing measurements Depending on the system confi...

Страница 30: ...s applicable in your country If necessary other national and international standards and guidelines in the latest applicable version Local safety and accident prevention regulations Employers liability insurance association regulations if any Use the personal protective equipment for protection against electric shock and burning due to possible arcing faults in compliance with the local work safet...

Страница 31: ...ing safety plates You may touch the parts that were under voltage only if they are visibly earthed and short circuited 6 2 Lifting and carrying the transport cases To transport the transport cases containing the PD TaD 80 and accessories pull them along on their wheels To extend the telescopic handle of the transport case release the locking mechanism 1 and extend the telescopic handle 2 The trans...

Страница 32: ...s at the terminals to avoid dangerous charging 4 All cables that are used in danger zones can also carry high voltage potential outwards Therefore remove these cables from the danger zone or ensure low resistive earthing and short circuit 5 Follow the cable route and ensure that no work is being carried out underground on gas lines and that there are no other danger points 6 6 Setting up the syste...

Страница 33: ...mple for attaching the PD TaD 80 to a cross beam 1 Loosen and remove the 5 screws on the underside of the PD TaD 80 2 Screw the mounting bracket to the PD TaD 80 using the 5 screws see Fig 3 Repeat steps 1 to 2 on the opposite side of the PD TaD 80 4 Place the PD TaD 80 on the cross beam 5 Guide the tension belts through the recesses located on both sides of the mounting brackets and fasten the PD...

Страница 34: ...surement result 6 9 Earth system Note All the necessary connection cables and connecting elements are included in the standard delivery 1 A 16 mm2 protective earthing cable is included in the standard delivery of the PD TaD 80 Use this cable to connect the protective earthing connection of the PD TaD 80 to the station earth directly on the test object screen Important To keep the antenna effect to...

Страница 35: ...nts and far end are prepared for the measurement tasks Further information Chapter Preparing the test object terminals on page 32 HV coupling unit of PD TaD and the cable terminations of the test object are clean and dry Further information Chapter Cleaning the PD TaD 80 and system components on page 60 Required equipment PD TaD incl connection cables HF filter PoE cable on hand cable drum Anti co...

Страница 36: ...ct the PD TaD 80 to the station earth close to the test object cable screen Further information Chapter Earth system on page 34 In the cable test van on the connection box of the cable drum rack If present connect the external emergency off unit to the connection box of the cable drum rack port If you are not using an external emergency off unit ensure that a jumper plug is inserted into the port ...

Страница 37: ...ase to be tested 14 HV connection cable of PD TaD 80 Connect the PD TaD 80 HV OUT port to the phase to be tested To do this select the shorter of the two supplied HV connection cables Place the HV connection cable as far away as possible from the adjacent live and earthed parts At the near and far end of the test object 15 Remove the earthing and short circuit connection from the phase to be teste...

Страница 38: ... HV connection cable without screen in the same way Important To keep the connection cable between the PD TaD and the test object short place the PD TaD as close as possible to the test object To avoid interference due to partial discharge at the connection point make sure the PD TaD is placed a sufficient distance away from metal and live parts If the connection point is higher up put the PD TaD ...

Страница 39: ...to the Power Box Laptop port If you do not want to run the laptop off its battery connect the laptop to the Power Box to establish a power supply To do so use the connection cable with the C14G plug At the PD TaD 80 6 PoE cable Connect the PoE cable to the Power Box PD Detector port and to PD TaD 80 Power Box port This is used for power supply and data transmission at the same time 7 Connect the H...

Страница 40: ...d short circuited 6 11 Connecting the system for dissipation factor measurement 6 11 1 Connecting the PD TaD in the cable test van Prerequisites The workplace must be de energised earthed and short circuited Further information Chapter Ensuring there is no voltage at the work place on page 32 The connection points and far end are prepared for the measurement tasks Further information Chapter Prepa...

Страница 41: ...are created The numbering in the table gives the sequence of steps for connecting the test object No Cable Step 1 Protective and auxiliary earthing cables of the cable test van on cable drum rack Earth the cable test van Further information Additional manual for systems with diagnostics functions 2 Protective earthing cable of PD TaD 80 flat copper strip Connect the PD TaD 80 to the station earth ...

Страница 42: ...HV Cable port 7 See above Connect the HV connection cable to the HF filter on the HV IN port In the cable test van 8 For titron systems only If the connecting plug is inserted in the HV connection socket of the DU 80 discharge unit unplug it and hang it in the holder 9 HV connection cable of the cable test van on cable drum rack Connect the HV connection cable to the DU 80 discharge unit Guide all...

Страница 43: ... anti corona protection device to the cable termination of the phase to be tested 17 Protective ring conductive hook and loop fastener tape Attach a protective ring to the cable termination of the phase to be tested directly over the screen Important Ensure that the protective ring does not come into contact with the screen 18 VSE cables with Ø 4 mm connector and a connection clip yellow 2x Connec...

Страница 44: ... for the measurement tasks Further information Chapter Preparing the test object terminals on page 32 HV coupling unit of PD TaD and the cable terminations of the test object are clean and dry Further information Chapter Cleaning the PD TaD 80 and system components on page 60 Required equipment PD TaD incl connection cables HF filter PoE cable tan δ cable VSE cable Protective rings conductive hook...

Страница 45: ...reated The numbering in the table gives the sequence of steps for connecting the test object No Cable Step 1 Protective earthing cable of the VLF HV generator Earth the VLF HV generator Further information User manual for the respective VLF HV generator 2 Protective earthing cable of PD TaD 80 flat copper strip Connect the PD TaD 80 to the station earth close to the test object cable screen Furthe...

Страница 46: ...he HV IN port Further information Chapter Connecting the HF filter to the PD TaD 80 on page 48 9 HV connection cable of the VLF HV generator Connect the screen of the HV connection cable to the Screen HV Cable port 10 See above Connect the HV connection cable to the HF filter at the HV IN port Further information Chapter Connecting the HF filter to the PD TaD 80 on page 48 11 Short circuit cable o...

Страница 47: ...ve ring does not come into contact with the screen 19 VSE cables with Ø 4 mm connector and a connection clip yellow 2x Connect a VSE cable to each of the VSE ports on the PD TaD 80 From the VSE ports connect a VSE cable to the protective ring of the phase to be tested the de energised phase that is used as a return circuit for leakage currents from the far end 20 HV connection cable of PD TaD 80 C...

Страница 48: ...nection cable and an anti corona hood onto the HF filter Ensure that the HV connection cable leads away at a right angle to the HF filter 6 12 2 Connecting the HF filter with a connection piece 1 Screw the HF filter onto the HV IN connection of the PD TaD 80 2 Fit the connection piece on the HF filter and screw it on tight 3 Remove the HV connection clip from the HV connection cable 4 Attach the c...

Страница 49: ...Too high or too low mains voltage A low mains voltage adversely affects the function of the system a high mains voltage can cause damage Ensure that the supply voltage matches the specifications on the rating plate 1 Measure the mains voltage with a voltmeter 2 Compare the mains voltage with the specifications on the rating plate 3 Make sure that the mains supply earth is not isolated from the sta...

Страница 50: ...other person can access the test area persons standing outside the boundary cannot reach the operating elements of the test system located inside the boundary EN 50191 The minimum height of individual boundaries must be 1 m 5 If the system is cordoned off from general areas only with ropes chains or bars the entire test structure must be monitored during the test in compliance with EN 50191 If the...

Страница 51: ...he PD TaD 80 will be switched on automatically when it is supplied with voltage Wait until all the LEDs on the PD TaD 80 display the ready for operation status PWR green PD orange 3 Start the BAUR software 4 The Dashboard opens For information on performing the diagnostics methods refer to the user manuals for the BAUR software 4 7 2 Selecting a cable route and entering cable data For information ...

Страница 52: ...ating the PD test circuit and performing PD testing refer to the user manual for the BAUR software 4 For information on operating the cable test van or VLF HV generator refer to the user manual for the cable test van or the respective VLF HV generator 8 PARTIAL DISCHARGE MEASUREMENT ...

Страница 53: ...ming and evaluating the testing and diagnostics methods refer to the user manual for the BAUR software 4 If you have a viola TD VLF HV generator standalone you can create and use templates for dissipation factor measurement on the VLF HV generator For information on performing and evaluating the dissipation factor measurement with the viola TD VLF HV generator standalone refer to the user manuals ...

Страница 54: ...ting Further information Chapter Connecting the system for PD measurement on page 35 2 Calibrate the PD test circuit 3 Start VLF cable testing 4 Configure and start PD testing in the BAUR software 5 Monitor the trend of the PD measurement results during testing Information on calibrating the PD test circuit as well as performing PD testing and VLF cable testing is given in the user manual for the ...

Страница 55: ... 80 Evaluation of partial discharge testing 822 188 3 55 74 For information on evaluating the PD measurement results refer to the user manual for the BAUR software 4 11 EVALUATION OF PARTIAL DISCHARGE TESTING ...

Страница 56: ...uit The test object at the connection point and at the far end You may touch the plant parts that were under voltage only if they are visibly earthed and short circuited Connect the discharge and earth rod correctly to the station earth Only use the discharge and earth rod if its surface is clean and dry Hold the discharge and earth rod only at the handles Observe the minimum discharge period in a...

Страница 57: ...arthing cable of the discharge and earth rod 1 If not yet connected connect the earth cable of the protective earthing cable of the discharge and earth rod to the station earth 2 Assemble the discharge rod a Screw the hook onto the discharge part b Screw the discharge part onto the handle 3 Use the black handle to hold the discharge and earth rod and make contact with the test object by touching i...

Страница 58: ...s and arcing faults Keep a distance of at least 50 cm from the protective earthing cable of the discharge and earth rod 1 If not yet connected connect the earth cable of the protective earthing cable of the discharge and earth rod to the station earth 2 Assemble the earth rod Screw the hook into the handle 3 Contact the test object with the tip of the earth rod 4 Immediately after earthing connect...

Страница 59: ...st van or the respective VLF HV generator 2 Disconnect the system completely from the mains voltage 3 Disconnect the HV connection cables 4 Establish a short circuit connection between the HV ports HV IN and HV OUT and the protective earthing connection on the PD TaD 80 Insert the short circuit cable into the side sockets on the HV ports HV IN and HV OUT so that the short circuit cable plugs are n...

Страница 60: ... coupling unit Opening the housing can damage the device 14 2 Cleaning the PD TaD 80 and system components NOTICE Damage to the device may be caused by using the wrong cleaning agents Do not use any abrasive corrosive cleaning agents or strong solvents Ensure material compatibility Do not clean the product with acetone or thinner Never clean electrical devices with water Mild detergent for cleanin...

Страница 61: ...quisites Flat blade screwdriver size 1 2 x 6 5 mm Device protection fuses 2 x T 16 AH 250 V 16 A time lag rated breaking capacity 1500 A H Procedure 1 Fuse cartridge 2 Fuse 3 Groove 1 Unscrew the fuse cartridge 1 out of the groove 3 2 Replace the fuse 2 3 Screw the fuse cartridge 1 back into the groove 3 ...

Страница 62: ...t side of the housing and open the calibrator housing 3 Remove the old batteries 4 Insert new batteries 5 Close the calibrator housing and screw it tight 6 Dispose of the old batteries in compliance with the local regulations 14 5 Accessories and spare parts Only use accessories and original spare parts recommended by BAUR Only use the supplied connection cables or cable of the same specification ...

Страница 63: ... and safety control unit or the mains supply unit Further information User manual for the cable test van PD TaD 80 as a standalone system in the Power Box Further information Chapter Power Box PD TaD 80 as a standalone system on page 18 3 Check whether the system is in the required operating state 4 Restart the PC or laptop Start the BAUR system software and check whether the fault continues to oc...

Страница 64: ...tation comply with the ambient conditions specified in the technical data of the product The technical data is given in the corresponding section of this user manual To prevent the short circuit cable plug from being pulled out during transportation ensure that the short circuit cable is inserted into the HV connectors HV IN and HV OUT in the side Protect all PD TaD 80 system components against st...

Страница 65: ...ecified in the technical data of the product Information on the technical data is given in the corresponding section of this user manual Protect the system and components from humidity Protect the system against unauthorised access Warranty For warranty claims please contact BAUR GmbH or your local BAUR representative http www baur eu baur worldwide Warranty is cancelled in case of misuse After Sa...

Страница 66: ... regulations and standards System components do not belong in the domestic waste Dispose of electrical system components in accordance with the applicable national regulations Dispose of the various system components in an environmentally friendly manner and in accordance with the applicable national regulations 18 DISPOSAL 19 DELIVERY SCOPE AND OPTIONS ...

Страница 67: ... 80 with Power Box to which this declaration refers conforms to the following standards or standard documents Low Voltage Directive 2014 35 EC EN 61010 1 2010 EN 61010 2 030 2010 EN 50191 2010 EMC Directive 2014 30 EU EN 55011 2009 A1 2010 EN 61000 3 2 2014 EN 61000 4 2 2009 EN 61000 4 4 2012 EN 61000 4 5 2014 EN 61000 4 11 2004 Environmental testing EN 60068 2 ff Signed Dr Markus Baur CEO Sulz 05...

Страница 68: ...een the ideal capacitive current and the real total current The difference between these two values is determined by the ohmic dissipation current and various different polarisation mechanisms The greater the dissipation angle is the higher the dielectric dissipation is F Far end The far end represents the end point of the test object opposite the connection point N Near end connection point The c...

Страница 69: ...sipation factor during a voltage step System All of the technical components that are connected to one another and related to one another and which are regarded as a single unit with regard to their function V VLF cable testing with parallel PD test This method combines the statements of a PD test and VLF cable testing While the cable test shows whether a cable can withstand a load e g 2x Uo over ...

Страница 70: ...ctor measurement 40 Connecting the system for PD measurement 35 Connecting the system to the PHG 70 80 portable VLF HV generator 37 44 Connecting the system to the supply voltage 49 Connection cables 22 Connection point near end 68 Connection set 19 Connection with an HV connection cable with MC plug 49 D Dangers when working with high voltage 11 Declaration of conformity 67 Delivery scope and opt...

Страница 71: ...ng the testing system out of operation 59 R Replacing the calibrator battery 62 Replacing the device protection fuses in the Power Box 61 Required equipment 35 38 40 44 S Securing the PD TaD 80 to the cross beam 33 Securing the test area 50 Selecting a cable route and entering cable data 51 Setting up the system 32 Special maintenance instructions 60 Special personal protective equipment 13 Specif...

Страница 72: ...Index PD TaD 80 72 74 822 188 3 W Warranty and After Sales 65 ...

Страница 73: ......

Страница 74: ...BAUR GmbH Raiffeisenstraße 8 6832 Sulz Austria headoffice baur at www baur eu 822 188 3 phd 02 07 2019 822 188 3 ...

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