VACUTAP VR 2016 CDS
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Questions and Answers

What is the part number for the Toolkit VM + VR TS?

  • 6524640001 (correct)
  • 6530240000
  • 6531260000
  • 6524640000

    • What size is the Allen bolt OT30?

    M8 x 25

    The half-round head bolt M5 x 12 has a torque specification of 5 Nm.

    True

    The new IEM is shipped in the ______ position.

    <p>basic</p> Signup and view all the answers

    Match the bolt connection types with their part numbers:

    <p>Type A = 782131XX 0092 Type C = 766465XX 0022 Type E = 766327XX 0115 Type K = 745006XX 0135</p> Signup and view all the answers

    What is the function of a pull-off tool?

    <p>To remove components such as selector coupling</p> Signup and view all the answers

    What torque specification is indicated for the dowel pin?

    <p>9.5 Nm</p> Signup and view all the answers

    The transition resistors must be left on the MD-resistor pack for later installation.

    <p>True</p> Signup and view all the answers

    What is the risk associated with improperly removing the diverter switch insert?

    <p>Personal injury or damage to property</p> Signup and view all the answers

    The size of the retaining ring pliers A11 is ______.

    <p>bent</p> Signup and view all the answers

    What should be removed from the upper shielding ring when removing the coupling tube?

    <p>Lower shielding ring</p> Signup and view all the answers

    What tool is used to remove the drive sleeves from the coupling tube?

    <p>Pull-off tool</p> Signup and view all the answers

    You should leave the lower bolts of bolt connection C untouched until later.

    <p>True</p> Signup and view all the answers

    Which items need to be removed when removing the spring energy accumulator spring? (Select all that apply)

    <p>Energy accumulator spring</p> Signup and view all the answers

    What should be checked for the needle roller bearing?

    <p>Visual inspection for damage</p> Signup and view all the answers

    To set axial play of the drive shaft, it should be adjusted to _____ mm.

    <p>0.1 - 0.3</p> Signup and view all the answers

    What must be installed with the new IEM? (Select all that apply)

    <p>Energy accumulator spring</p> Signup and view all the answers

    Install bolted connections with OT30 or OT80 coating in multiple steps.

    <p>False</p> Signup and view all the answers

    What tool is recommended to temporarily install the support pin?

    <p>Old bolt</p> Signup and view all the answers

    It is safe to perform work without observing safety instructions.

    <p>False</p> Signup and view all the answers

    What must be removed before starting maintenance work on the diverter switch insert?

    <p>Diverter switch insert</p> Signup and view all the answers

    How many screws must be removed to access the lower shielding ring?

    <p>6</p> Signup and view all the answers

    What should be done during the visual inspection of the coupling tube?

    <p>Check for mechanical or electrical damage</p> Signup and view all the answers

    What is the maximum number of tap-change operations allowed before replacing the oil compartment contacts?

    <p>1,200,000</p> Signup and view all the answers

    What type of damage can occur if work is performed by insufficiently qualified personnel?

    <p>Personal damage, property damage, or malfunction</p> Signup and view all the answers

    The first maintenance on oil compartment contacts must be performed after _____ tap-change operations.

    <p>300,000</p> Signup and view all the answers

    Match the maintenance intervals with the corresponding operations:

    <p>First replacement of vacuum interrupters = 300,000 operations Second replacement of vacuum interrupters = 600,000 operations Final replacement of vacuum interrupters = 900,000 operations</p> Signup and view all the answers

    What is the required axial play measurement between the retaining ring and fitting washers?

    <p>0.1 - 0.3 mm</p> Signup and view all the answers

    What tightening torque is specified for installing the cam disk?

    <p>20 Nm</p> Signup and view all the answers

    What should be done to ensure safety when placing the cam disk on the diverter switch insert?

    <p>Ensure that your fingers are not between the cam disk and diverter switch insert.</p> Signup and view all the answers

    What is the adjustment position on the side for the coupling tube installation?

    <p>Side A</p> Signup and view all the answers

    What type of bolts should be used for installing transition resistors?

    <p>Type I bolts</p> Signup and view all the answers

    What risk is associated with improper removal of the diverter switch insert?

    <p>Both A and B</p> Signup and view all the answers

    What is the procedure for the final installation of transition resistors regarding the spacer sleeves?

    <p>Check their correct seat before installing the transition resistor.</p> Signup and view all the answers

    The tightening torque for bolt connection type J is the same before and after October 31, 2019.

    <p>False</p> Signup and view all the answers

    What is the tightening torque specified for the installation of the stabilizer?

    <p>4.5 Nm</p> Signup and view all the answers

    Measure X and measure Y should be performed before _____ installation.

    <p>transition resistor</p> Signup and view all the answers

    How many nuts should be replaced per sector for bolt connection type J?

    <p>4 nuts</p> Signup and view all the answers

    What is the wear width b DSI for Example 1?

    <p>&lt; 4.5 mm</p> Signup and view all the answers

    In Example 2, contact replacement is necessary at the next maintenance.

    <p>True</p> Signup and view all the answers

    What is the wear depth t oil compartment contact in Example 5?

    <p>must be &lt; 0.4 mm</p> Signup and view all the answers

    The maximum tolerance for number of tap-change operations between maintenance intervals is ________.

    <p>950,000</p> Signup and view all the answers

    How often should vacuum interrupters generally be replaced?

    <p>Both A and B</p> Signup and view all the answers

    Match the following types of measurements with their corresponding actions.

    <p>Wear width b DSI &lt; 4.5 mm = Not necessary Wear width b DSI &gt; 4.5 mm = Necessary Wear depth t oil compartment contact &lt; 0.2 mm = Not necessary Wear depth t oil compartment contact &gt; 0.2 mm = Necessary</p> Signup and view all the answers

    What is the torque value for the Allen bolt OT30 used in the oil compartment contacts?

    <p>35 Nm</p> Signup and view all the answers

    The replacement interval for oil compartment contacts is 1,200,000 tap-change operations.

    <p>False</p> Signup and view all the answers

    What must be observed to avoid personal damage or malfunction when working with on-load tap-changers?

    <p>Safety and hazard instructions must be followed.</p> Signup and view all the answers

    The oil compartment contacts must be replaced after _____ operations.

    <p>1,200,000</p> Signup and view all the answers

    For which type of on-load tap-changer is no replacement necessary when retrofitting to VACUTAP® VM®?

    <p>OILTAP® M</p> Signup and view all the answers

    Match the on-load tap-changer types with their replacement intervals for oil compartment contacts:

    <p>OILTAP® M = 2,000,000 – 2,400,000 OILTAP® MS = Replacement only within scope of selector maintenance VACUTAP® VRF I = 300,000 VACUTAP® VM® = 2,000,000 – 2,400,000</p> Signup and view all the answers

    What is the consequence of exceeding a wear value of 8.0 mm on a DSI main contact?

    <p>Replacement is required.</p> Signup and view all the answers

    The wear depth 't' of a commutation mark in the oil compartment must not exceed _____ mm.

    <p>0.6</p> Signup and view all the answers

    What should you do before installing bolted connections with OT30 or OT80 coating?

    <p>Ensure the connection elements are free of oil and grease.</p> Signup and view all the answers

    What is the specified tightening torque for the support pin installation?

    <p>8 Nm</p> Signup and view all the answers

    You should reinstall the auxiliary device after measuring the specified value 'L'.

    <p>False</p> Signup and view all the answers

    The IEM is delivered without __________.

    <p>grooved ball bearing</p> Signup and view all the answers

    What is the purpose of the fitting washers when installing the drive shaft?

    <p>To set axial play of drive shaft to 0.1 - 0.3 mm</p> Signup and view all the answers

    The Toolkit VM + VR TS part number is _____

    <p>6524640001</p> Signup and view all the answers

    What is the size of the Allen bolt OT30 used in bolt connection type A?

    <p>M8 x 25</p> Signup and view all the answers

    What is the torque for dowel pin in bolt connection type C?

    <p>9.5 Nm</p> Signup and view all the answers

    Which tools are part of bolt connection type K?

    <p>Hex.head bolt OT30 M8 x 40</p> Signup and view all the answers

    The diverter switch insert and IEM must be in a basic position before starting work.

    <p>True</p> Signup and view all the answers

    What is necessary to remove before lifting the diverter switch insert?

    <p>Lower retaining ring, selector coupling, feather key, top retaining ring</p> Signup and view all the answers

    What should be done before removing the resistor connecting leads?

    <p>Deposit the diverter switch insert on a work surface</p> Signup and view all the answers

    The nominal torque for the half-round head bolt in connection type K is _____

    <p>20 Nm</p> Signup and view all the answers

    What is the part number for the Auxilliary device AD-tensioning guide tube?

    <p>6530010000</p> Signup and view all the answers

    It is safe to install the MD-resistor pack if the crane operator is unqualified.

    <p>False</p> Signup and view all the answers

    What is the torque value for an Allen bolt OT30 used in the bolt connection elements of oil compartment contacts?

    <p>35 Nm</p> Signup and view all the answers

    What is the replacement interval in operations for the oil compartment contacts of the VACUTAP® VM®?

    <p>2,000,000 – 2,400,000</p> Signup and view all the answers

    The oil compartment contacts need to be replaced after 1,200,000 tap-change operations.

    <p>True</p> Signup and view all the answers

    Which of the following conditions would require the measurement of wear depth on oil compartment contacts?

    <p>When the number of DSI contact operations is less than the number of oil compartment contact operations.</p> Signup and view all the answers

    The replacement interval for the OILTAP® M diverter switch insert is ____ operations.

    <p>800,000</p> Signup and view all the answers

    What is the significance of measuring wear width on the DSI?

    <p>It helps determine if the main contacts need replacement.</p> Signup and view all the answers

    Performing work with insufficiently qualified personnel poses a risk of personal damage or injury.

    <p>True</p> Signup and view all the answers

    What is required to ensure safety before starting work?

    <p>Read the instructions carefully.</p> Signup and view all the answers

    What must be removed to inspect the coupling tube?

    <p>Diverter switch insert</p> Signup and view all the answers

    The coupling tube must be cleaned with ______.

    <p>transformer oil</p> Signup and view all the answers

    The coupling tube is refitted following the instructions for removal but in ______ order.

    <p>reverse</p> Signup and view all the answers

    What is the measure of axial play that should be checked between the retaining ring and fitting washers?

    <p>0.1 - 0.3 mm</p> Signup and view all the answers

    What is the permitted deviation for transition resistance measurements?

    <p>± 10 %</p> Signup and view all the answers

    What tightening torque is required when installing the cam disk to the drive shaft?

    <p>20 Nm</p> Signup and view all the answers

    The coupling tube must be installed in the same order as it was removed.

    <p>False</p> Signup and view all the answers

    How often must the oil compartment contacts be replaced?

    <p>After 1,200,000 operations</p> Signup and view all the answers

    What should be done if deviations larger than permitted values are found?

    <p>Contact the Technical Service department.</p> Signup and view all the answers

    What type of tool should be used to install drive sleeves in the coupling tube?

    <p>Pull-off tool</p> Signup and view all the answers

    How many nuts should be replaced per sector of bolt connection type J?

    <p>4 nuts</p> Signup and view all the answers

    What is used to measure wear width on a diverter switch insert?

    <p>Caliper</p> Signup and view all the answers

    What should be ensured during the refitting of the coupling tube?

    <p>Follow the color markings of adjustment</p> Signup and view all the answers

    The transition resistors must not collide with the ______ on the supporting bars of the diverter switch insert.

    <p>supports</p> Signup and view all the answers

    What is the maximum tightening torque for the middle bolts of connection type I?

    <p>6.5 Nm</p> Signup and view all the answers

    Transporting the diverter switch insert can lead to tipping if not handled correctly.

    <p>True</p> Signup and view all the answers

    What should be done if spacer sleeves are installed before installing the transition resistor?

    <p>Check their correct seat</p> Signup and view all the answers

    The diverter switch insert must be placed on the supporting bars at all times, regardless of the stabilizer's installation.

    <p>False</p> Signup and view all the answers

    Match the bolt connection type with its respective tightening torque:

    <p>Type J = 5 Nm Type I = 6.5 Nm Type E = 5 Nm Type F = 5 Nm</p> Signup and view all the answers

    What is the maximum wear width (b DSI) that is acceptable for a contact replacement to not be necessary?

    <p>&lt; 6.0 mm</p> Signup and view all the answers

    The wear depth (t oil compartment contact) must be greater than 0.2 mm for maintenance.

    <p>True</p> Signup and view all the answers

    What is the maintenance interval for replacing vacuum interrupters?

    <p>After every 300,000 or 600,000 operations</p> Signup and view all the answers

    The number of tap-change operations of the oil compartment contacts must be less than ________ for maintenance.

    <p>950,000</p> Signup and view all the answers

    Match the number of tap-change operations with their required actions:

    <p>300,000 = Replace vacuum interrupters 600,000 = Replace vacuum interrupters 1,200,000 = Replace contacts 950,000 = Tolerable for maintenance</p> Signup and view all the answers

    The diverter switch insert must always be transported and installed on a level surface.

    <p>True</p> Signup and view all the answers

    What action must be taken if the wear depth (t oil compartment contact) exceeds 0.4 mm?

    <p>Replace contacts during next maintenance</p> Signup and view all the answers

    Match the on-load tap-changers with their replacement intervals for oil compartment contacts:

    <p>OILTAP® M = 2,000,000 – 2,400,000 OILTAP® MS = 800,000 VACUTAP® VM® = 2,000,000 – 2,400,000 VACUTAP® VRF I = 300,000</p> Signup and view all the answers

    What is the torque size for the Allen bolt OT30?

    <p>35 Nm</p> Signup and view all the answers

    What is required before starting work on the on-load tap-changer?

    <p>Profound knowledge and experience acquired during training.</p> Signup and view all the answers

    The diverter switch insert can be replaced without any prior removal steps.

    <p>False</p> Signup and view all the answers

    The replacement interval for VACUTAP® VRS is ______ operations.

    <p>1,200,000</p> Signup and view all the answers

    What measurement must be performed to determine wear on main contacts?

    <p>Measurement of wear width b and wear depth t.</p> Signup and view all the answers

    What is the maximum allowable depth t of a commutation mark on a fixed main contact in the oil compartment?

    <p>0.6 mm</p> Signup and view all the answers

    The oil compartment contacts must always be replaced after reaching a width of 8.0 mm on the DSI.

    <p>True</p> Signup and view all the answers

    The instructions for handling the diverter switch insert must be followed to avoid the risk of personal damage or injury.

    <p>True</p> Signup and view all the answers

    What is the maximum number of tap-change operations before the oil compartment contacts must be replaced?

    <p>1,200,000</p> Signup and view all the answers

    What should be checked for during the visual inspection of the coupling tube?

    <p>Mechanical or electrical damage, including leakage paths and discharge marks.</p> Signup and view all the answers

    The coupling tube is cleaned with __________ to ensure proper maintenance.

    <p>transformer oil</p> Signup and view all the answers

    What is required before inspecting the coupling tube?

    <p>Remove the lower shielding ring screws</p> Signup and view all the answers

    Contact wear on the main contact must be documented during maintenance.

    <p>True</p> Signup and view all the answers

    What must be compared after measuring transition resistances?

    <p>The measurements must be compared with details on the nameplate.</p> Signup and view all the answers

    Match the following tap-changer types with their criteria for contact replacement:

    <p>VRS = 1,200,000 tap-change operations VRM = 1,200,000 tap-change operations VRL = 1,200,000 tap-change operations VRH = 1,200,000 tap-change operations VRX = 1,200,000 tap-change operations</p> Signup and view all the answers

    The diverter switch insert must be __________ during setup to prevent tipping.

    <p>secured</p> Signup and view all the answers

    What must be done if the number of DSI contact operations is less than the number of oil compartment contact operations?

    <p>Wear depth t on the oil compartment contact must be measured and evaluated.</p> Signup and view all the answers

    What must be done after removing the retaining ring below the grooved ball bearing?

    <p>Pull out selector drive shaft vertically.</p> Signup and view all the answers

    Damage to the on-load tap-changer can occur if connections are performed incorrectly. When using bolts and nuts with OT30 or OT80 coating, always make sure that the bolted connection elements are free of ______.

    <p>oil and grease</p> Signup and view all the answers

    New bolts or nuts with intact OT coating must be used if a bolted connection needs to be released again.

    <p>True</p> Signup and view all the answers

    What should be visually checked on the needle roller bearing?

    <p>Check for mechanical or electrical damage.</p> Signup and view all the answers

    What is the next step after checking the specified value 'L'?

    <p>Set required specified value 'L' by turning the spring guide.</p> Signup and view all the answers

    To set axial play of the drive shaft, fitting washers should be used to set axial play to ______.

    <p>0.1 - 0.3 mm</p> Signup and view all the answers

    What is the first step in installing new vacuum interrupters?

    <p>Unpack the new IEM.</p> Signup and view all the answers

    Which bolt connection type is associated with the Torx bit?

    <p>Bolt connection type C</p> Signup and view all the answers

    What is the part number for the Mounting device MD-VM nut holder?

    <p>6530240000</p> Signup and view all the answers

    The size of the Allen bolt OT30 is _____ x 25.

    <p>M8</p> Signup and view all the answers

    What is the torque for a dowel pin (8 x 12)?

    <p>9.5 Nm</p> Signup and view all the answers

    The new IEM is shipped in basic position.

    <p>True</p> Signup and view all the answers

    What must be done before starting work on the diverter switch insert?

    <p>Ensure IEM is in final end position</p> Signup and view all the answers

    What is the size of the Half-round head bolt for connection type F?

    <p>M5 x 12</p> Signup and view all the answers

    The part number for bolt connection element G is _____

    <p>10020219 0105</p> Signup and view all the answers

    What type of tool is used to remove the selector coupling?

    <p>Pull-off tool</p> Signup and view all the answers

    The risk of personal damage or injury occurs when a stabilizer is not installed.

    <p>True</p> Signup and view all the answers

    The nut for T grooves is described as a type _____ nut.

    <p>Square</p> Signup and view all the answers

    What is the axial play range that should be measured between the retaining ring and fitting washers?

    <p>0.1 - 0.3 mm</p> Signup and view all the answers

    What is the tightening torque for installing the cam disk to the drive shaft?

    <p>20 Nm</p> Signup and view all the answers

    What should be ensured to avoid personal damage or injury during the installation process?

    <p>Ensure fingers are not between cam disk and diverter switch insert.</p> Signup and view all the answers

    What tool is suggested for installing drive sleeves in the coupling tube?

    <p>Pull-off tool</p> Signup and view all the answers

    What is the maximum tightening torque for installing the resistor connecting lead?

    <p>6.5 Nm</p> Signup and view all the answers

    The replacement of oil compartment contacts is due after every _____ operations.

    <p>1,200,000</p> Signup and view all the answers

    Which installation position must be ensured when installing the coupling tube?

    <p>Both A and B</p> Signup and view all the answers

    The stabilizer must be installed firmly before placing the diverter switch insert on the supporting bars.

    <p>True</p> Signup and view all the answers

    What is the risk associated with the removal of the diverter switch insert by insufficiently qualified personnel?

    <p>Personal damage or injury and damage to property.</p> Signup and view all the answers

    What is the measured value for wear width b DSI in Example 1?

    <p>&lt; 4.5 mm</p> Signup and view all the answers

    Wear depth in the oil compartment contact is measurable in Example 1.

    <p>False</p> Signup and view all the answers

    Is contact replacement necessary at the next maintenance according to Example 1?

    <p>Not Necessary</p> Signup and view all the answers

    How many number of tap-change operations of the oil compartment contacts are specified in Table 11?

    <p>300,000</p> Signup and view all the answers

    What is the wear depth for the oil compartment contact in Example 4?

    <blockquote> <p>0.2 mm und &lt; 0.3 mm</p> </blockquote> Signup and view all the answers

    Contacts must be replaced during the next maintenance if the operations reach 1,200,000.

    <p>True</p> Signup and view all the answers

    After how many operations must the replacement of vacuum interrupters generally be performed?

    <p>300,000 or 600,000</p> Signup and view all the answers

    The measurement value of wear depth t oil compartment contact must be less than _____ mm in Example 5.

    <p>0.4</p> Signup and view all the answers

    It is safe to transport the diverter switch insert without securing it.

    <p>False</p> Signup and view all the answers

    What is the maximum wear width b DSI for Example 1?

    <p>&lt; 4.5 mm</p> Signup and view all the answers

    Contact replacement is necessary for Example 1.

    <p>False</p> Signup and view all the answers

    In Example 5, the wear depth t oil compartment contact must be less than ______

    <p>0.4 mm</p> Signup and view all the answers

    At what number of operations must the vacuum interrupters generally be replaced?

    <p>300,000</p> Signup and view all the answers

    How many operations correspond to the maintenance interval in Example 5?

    <p>1,200,000</p> Signup and view all the answers

    It is safe to transport the diverter switch insert without securing it.

    <p>False</p> Signup and view all the answers

    What should you do to prevent the diverter switch insert from tipping?

    <p>Secure it against tipping and transport carefully.</p> Signup and view all the answers

    After ______ operations at the earliest, the vacuum interrupters must be replaced.

    <p>290,000 or 580,000</p> Signup and view all the answers

    It is safe to perform work on the diverter switch insert if personnel are insufficiently qualified.

    <p>False</p> Signup and view all the answers

    What must be removed before starting work on an on-load tap-changer type?

    <p>The diverter switch insert</p> Signup and view all the answers

    The oil compartment contacts are replaced after ___ tap-change operations at the latest.

    <p>1,200,000</p> Signup and view all the answers

    What is the risk associated with insufficiently qualified personnel performing maintenance?

    <p>Personal damage or injury and damage to property.</p> Signup and view all the answers

    What procedure must be followed when inspecting the coupling tube?

    <p>Remove the coupling tube from the diverter switch insert.</p> Signup and view all the answers

    What is the maximum permissible wear width on a moving main contact of the DSI before replacement is necessary?

    <p>8.0 mm</p> Signup and view all the answers

    How many operations correspond to the first maintenance interval for oil compartment contacts?

    <p>300,000</p> Signup and view all the answers

    What must be done to ensure the adjustment marks are positioned correctly when reassembling the coupling tube?

    <p>The parts must be positioned as they were before disassembly.</p> Signup and view all the answers

    Only one way exists to measure contact wear on the oil compartment contacts.

    <p>False</p> Signup and view all the answers

    The oil compartment contacts must always be replaced before reaching the wear value of depth t greater than ___ mm.

    <p>0.6</p> Signup and view all the answers

    What is the measured axial play range between the retaining ring and fitting washers?

    <p>0.1 - 0.3 mm</p> Signup and view all the answers

    What must be ensured when placing the cam disk on the diverter switch insert?

    <p>Fingers are not between the cam disk and diverter switch insert.</p> Signup and view all the answers

    What is the tightening torque specified for installing the cam disk?

    <p>20 Nm</p> Signup and view all the answers

    The coupling tube must be installed in the _____ order of removal.

    <p>reverse</p> Signup and view all the answers

    The installation of the coupling tube can be done without paying attention to marks on the cam disk.

    <p>False</p> Signup and view all the answers

    What tool is used to install drive sleeves in the coupling tube?

    <p>Pull-off tool</p> Signup and view all the answers

    How should the transition resistors be positioned relative to the central shaft?

    <p>As close as possible</p> Signup and view all the answers

    What tightening torque is recommended for the middle bolts in connection type I?

    <p>6.5 Nm</p> Signup and view all the answers

    What type of bolt is used in the bolt connection type J for diverter switch inserts from specific delivery dates?

    <p>Half-round head bolt</p> Signup and view all the answers

    Replacement of oil compartment contacts is due after every _____ operations.

    <p>1,200,000</p> Signup and view all the answers

    The installation of resistor connecting leads should be done without any adjustments.

    <p>False</p> Signup and view all the answers

    What is the part number for the Toolkit VM + VR TS?

    <p>6524640001</p> Signup and view all the answers

    What is the torque for the Allen bolt OT30?

    <p>20 Nm</p> Signup and view all the answers

    Which bolt connection type is used for TX bolt M4x50?

    <p>C</p> Signup and view all the answers

    What is the part number for the Half-round head bolt M5 x 12?

    <p>74157900 0060</p> Signup and view all the answers

    The diverter switch insert must only be placed on the supporting bars when the stabilizer is not installed.

    <p>False</p> Signup and view all the answers

    What should be done before starting work on the diverter switch insert?

    <p>Ensure the removed diverter switch insert and the new IEM are in basic position.</p> Signup and view all the answers

    What type of lifting tool is used to remove the selector coupling?

    <p>Pull-off tool</p> Signup and view all the answers

    The torque for the Half-round head bolt M5 x 14 is ____ Nm.

    <p>5 Nm</p> Signup and view all the answers

    How should blocking nuts be prepared for installation of the transition resistors?

    <p>Turn nuts upward manually until they touch the transition resistors.</p> Signup and view all the answers

    It is unsafe to remove the retaining ring below the grooved ball bearing without proper placement.

    <p>True</p> Signup and view all the answers

    What should be cleaned before visual inspection of the coupling tube?

    <p>Coupling tube inside and outside</p> Signup and view all the answers

    What is the tool used to remove the drive sleeves from the coupling tube?

    <p>Pull-off tool</p> Signup and view all the answers

    What size of socket adapter is used to remove bolts of the lower shielding ring?

    <p>13 mm</p> Signup and view all the answers

    What must be checked visually when removing the selector drive shaft?

    <p>Needle roller bearing</p> Signup and view all the answers

    What must be removed from the upper side of the spring energy accumulator before replacing the energy accumulator spring?

    <p>All of the above</p> Signup and view all the answers

    Dowel pin must be removed before measuring specified value 'L'.

    <p>True</p> Signup and view all the answers

    What must be installed to ensure the spring energy accumulator is in basic position?

    <p>All of the above</p> Signup and view all the answers

    What is the specified tightening torque when completing installation of the support pin?

    <p>8 Nm</p> Signup and view all the answers

    Match the following components with their corresponding actions during installation:

    <p>Support pin = Installed temporarily Dowel pin = Installed to secure components Support ring = Installed with washers Sleeve bearings = Installed in spring guide</p> Signup and view all the answers

    The specified value 'L' must be set to _____ when installing a new energy accumulator spring.

    <p>default value</p> Signup and view all the answers

    The IEM is delivered with the grooved ball bearing installed.

    <p>False</p> Signup and view all the answers

    What is the size of the Allen bolt OT30 used in the oil compartment contacts?

    <p>M10x2</p> Signup and view all the answers

    It is necessary to remove the diverter switch insert before performing certain maintenance tasks.

    <p>True</p> Signup and view all the answers

    What is the required torque for the Allen bolt used in oil compartment contacts?

    <p>35 Nm</p> Signup and view all the answers

    Which on-load tap-changer type should replace oil compartment contacts after 1,200,000 operations?

    <p>VACUTAP® VRL I</p> Signup and view all the answers

    The oil compartment contacts must be replaced after __________ tap-change operations.

    <p>1,200,000</p> Signup and view all the answers

    What is the maximum depth for a commutation mark on a fixed main contact to avoid premature replacement?

    <p>0.6 mm</p> Signup and view all the answers

    What is the replacement interval for OILTAP® R oil compartment contacts?

    <p>800,000 operations</p> Signup and view all the answers

    A diverter switch insert type VACUTAP® VM® does not need to be replaced when the oil compartment contact replacement interval is reached.

    <p>True</p> Signup and view all the answers

    Match the following on-load tap-changer types with their corresponding replacement intervals:

    <p>OILTAP® M = 2,000,000 – 2,400,000 operations VACUTAP® VM® = 2,000,000 – 2,400,000 operations OILTAP® R = 800,000 operations VACUTAP® VMS® = 600,000 operations</p> Signup and view all the answers

    Study Notes

    Safety and Preparation

    • Risk of personal injury or property damage exists if safety instructions are not followed by adequately trained personnel.
    • Thorough knowledge and experience are required for maintenance activities on on-load tap-changer types.
    • Removal of the diverter switch insert (or selector switch insert) is mandatory before beginning work.

    Inspection and Maintenance Procedure

    • Routine inspections must include coupling tube checks during each VACUTAP® Condition Assessment.
    • Coupling tube inspection steps:
      • Remove screws from the lower shielding ring and lift it.
      • Extract drive sleeves using pliers.
      • Remove and clean the coupling tube with transformer oil while adhering to oil quality standards.
      • Inspect for mechanical/electrical damage, such as leakage paths and discharge marks.
    • Ensure proper alignment of adjustment marks during reassembly of the coupling tube.

    Measuring Transition Resistances

    • Measure transition resistances during each inspection at designated measurement points.
    • Expected resistance values range from 0.1 to 30 ohms.
    • Deviations from nameplate values of up to ±10% are permissible; larger deviations require consultation with Technical Service.

    Checking Contact Wear and Replacement Criteria

    • Check contact wear on main contacts and replacement criteria during every maintenance cycle.
    • Document findings in the service report; oil compartment contacts replaced after 1,200,000 tap-change operations.
    • Measure wear width and depth:
      • Width on Diverter Switch Insert (DSI) and depth on oil compartment contacts.
      • Specific measurement criteria dictate replacement necessity based on assessed wear values.

    Tap-Change Operations and Maintenance Intervals

    • Monitor number of tap-change operations to determine maintenance intervals.
    • Specific wear measurement thresholds dictate whether contact replacement is necessary prior to scheduled maintenance.
    • Maintenance intervals outlined based on the number of operations:
      • 300,000, 600,000, and up to 1,200,000 operations require attention depending on wear metrics.

    Vacuum Interrupters Replacement

    • Replace vacuum interrupters after every 300,000 or 600,000 operations depending on the specific on-load tap-changer type.
    • Ensure correct transport and installation processes to prevent tipping and related hazards.
    • All necessary tools and materials should be prepared in advance for a smooth replacement operation, which includes vacuum interrupters and supporting structures.

    Tools and Materials Needed

    • Specific tools for the replacement process include various socket types, mounting devices, and auxiliary equipment.
    • Ensure that all connection elements are within specified torque limits to ensure safe and effective assembly.### Bolt Connection Elements
    • Different types of bolts listed include head bolts, half-round head bolts, Allen bolts, and hex head bolts.
    • Common sizes for bolts include M5, M6, and M8, with varying lengths such as 12 mm, 14 mm, 20 mm, and 40 mm.
    • Torque values range from 4.5 Nm for Allen bolts to 20 Nm for hex head bolts.
    • Components accompanying bolts include washers (both standard and spring), square nuts, and dowel pins.

    Removing Vacuum Interrupters

    • Ensure diverter switch insert and new interruptor exchange module (IEM) are in the basic position before starting the work.
    • Diverter switch insert must have the main contact visible on one side while the other side remains empty to indicate proper orientation.
    • Use a crane for the extraction of the diverter switch insert and ensure all necessary components, like the lower retaining ring and selector coupling, are removed in order.

    Risks During Operation

    • Installation and removal of components should be done only by qualified personnel to prevent personal injuries and property damage.
    • Special attention to stabilizers is critical; they must be securely installed before placing the diverter switch insert on supporting bars to avoid tilting.

    Transition Resistors and Leads Management

    • Transition resistors should be managed carefully during the installation; specific bolt connections (E, F, J) need to be removed.
    • Utilize proper tools and techniques to avoid damaging components, replacing or adjusting leads as necessary during disassembly.

    Installation of MD-Resistor Pack

    • Proper setup is essential for MD-resistor pack installation; adjustments for the height of transition resistors may vary.
    • Blocking nuts should be set precisely according to measurements to ensure compatibility with transition resistors.
    • Crane must be used to facilitate installation, ensuring smooth assembly without obstruction.

    Handling the Diverter Switch Insert

    • The diverter switch insert must be handled with care during placement to avoid crushing hazards, and deposit operations should occur in controlled steps.
    • The transition resistors must be placed properly without damaging the MD-resistor pack in the process.

    Final Steps for Component Replacement

    • Before removing the spring energy accumulator, bolts from specific connections must be addressed in sequential order to ensure stability.
    • Installation of lifting bolts on the top plate of the spring energy accumulator allows for safe removal using a crane, ensuring that all preparatory steps are meticulously followed.### Preparing the IEM
    • Ensure connections on the on-load tap-changer are performed correctly to avoid damage.
    • Remove all oil and grease from connection surfaces before installing bolted elements with OT30 or OT80 coatings.
    • Install bolted connections in one step, using specified tightening torque without re-tightening afterward.
    • If re-releasing a bolted connection, replace with new bolts or nuts, ensuring adhesive residues are cleaned.

    Roller Pin Replacement

    • Criteria for roller pin (cam roller) replacement are detailed in the maintenance manual.
    • If the installation includes an axial support ring (for shipments between April 25, 2016, and January 3, 2018), a new ring must be used; do not use one shipped after January 3, 2018.

    Energy Accumulator Spring Replacement

    • Removing the energy accumulator spring involves unscrewing an attachment bolt and removing a support pin.
    • The process requires the removal of sleeve bearings, dowel pin, washers, and the support ring before extracting the spring.
    • A new energy accumulator spring must be installed carefully according to specified dimensions.

    Adjusting Specified Value "L"

    • Setting and measuring the specified value "L" is crucial; understand that one full clockwise turn decreases the value by 1 mm and counterclockwise increases it by 1 mm.
    • Ensure that the dowel pin is aligned toward the energy accumulator carrier center after adjusting value "L".

    Installation of Spring Energy Accumulator and Drive Shaft

    • Installation should follow the reverse order of removal, ensuring that the IEM and components are correctly aligned in their basic positions.
    • Marks on the spring energy accumulator and IEM must match during installation.
    • Use bolt connections and set nuts carefully for secure assembly, utilizing a tool kit for proper installation.

    Setting Axial Play of Drive Shaft

    • The axial play of the drive shaft should be set between 0.1 - 0.3 mm, measured using a feeler gauge.
    • Fitting washers can adjust the axial play to the specified range.

    Installing Coupling Tube

    • Install the coupling tube in reverse order of removal, ensuring correct markings match during assembly.
    • The cam disk must be installed with appropriate attention to positioning for correct functioning.

    Transition Resistors and Connecting Leads

    • Strict adherence to safety protocols is required during the installation to prevent personal injury or equipment damage.
    • Complete bolt connections for resistor connecting leads, ensuring components are secured and positioned correctly.
    • Transition resistors should be positioned as closely as possible to the central shaft, facilitating accurate assembly.

    Safety and Preparation

    • Risk of personal injury or property damage exists if safety instructions are not followed by adequately trained personnel.
    • Thorough knowledge and experience are required for maintenance activities on on-load tap-changer types.
    • Removal of the diverter switch insert (or selector switch insert) is mandatory before beginning work.

    Inspection and Maintenance Procedure

    • Routine inspections must include coupling tube checks during each VACUTAP® Condition Assessment.
    • Coupling tube inspection steps:
      • Remove screws from the lower shielding ring and lift it.
      • Extract drive sleeves using pliers.
      • Remove and clean the coupling tube with transformer oil while adhering to oil quality standards.
      • Inspect for mechanical/electrical damage, such as leakage paths and discharge marks.
    • Ensure proper alignment of adjustment marks during reassembly of the coupling tube.

    Measuring Transition Resistances

    • Measure transition resistances during each inspection at designated measurement points.
    • Expected resistance values range from 0.1 to 30 ohms.
    • Deviations from nameplate values of up to ±10% are permissible; larger deviations require consultation with Technical Service.

    Checking Contact Wear and Replacement Criteria

    • Check contact wear on main contacts and replacement criteria during every maintenance cycle.
    • Document findings in the service report; oil compartment contacts replaced after 1,200,000 tap-change operations.
    • Measure wear width and depth:
      • Width on Diverter Switch Insert (DSI) and depth on oil compartment contacts.
      • Specific measurement criteria dictate replacement necessity based on assessed wear values.

    Tap-Change Operations and Maintenance Intervals

    • Monitor number of tap-change operations to determine maintenance intervals.
    • Specific wear measurement thresholds dictate whether contact replacement is necessary prior to scheduled maintenance.
    • Maintenance intervals outlined based on the number of operations:
      • 300,000, 600,000, and up to 1,200,000 operations require attention depending on wear metrics.

    Vacuum Interrupters Replacement

    • Replace vacuum interrupters after every 300,000 or 600,000 operations depending on the specific on-load tap-changer type.
    • Ensure correct transport and installation processes to prevent tipping and related hazards.
    • All necessary tools and materials should be prepared in advance for a smooth replacement operation, which includes vacuum interrupters and supporting structures.

    Tools and Materials Needed

    • Specific tools for the replacement process include various socket types, mounting devices, and auxiliary equipment.
    • Ensure that all connection elements are within specified torque limits to ensure safe and effective assembly.### Bolt Connection Elements
    • Different types of bolts listed include head bolts, half-round head bolts, Allen bolts, and hex head bolts.
    • Common sizes for bolts include M5, M6, and M8, with varying lengths such as 12 mm, 14 mm, 20 mm, and 40 mm.
    • Torque values range from 4.5 Nm for Allen bolts to 20 Nm for hex head bolts.
    • Components accompanying bolts include washers (both standard and spring), square nuts, and dowel pins.

    Removing Vacuum Interrupters

    • Ensure diverter switch insert and new interruptor exchange module (IEM) are in the basic position before starting the work.
    • Diverter switch insert must have the main contact visible on one side while the other side remains empty to indicate proper orientation.
    • Use a crane for the extraction of the diverter switch insert and ensure all necessary components, like the lower retaining ring and selector coupling, are removed in order.

    Risks During Operation

    • Installation and removal of components should be done only by qualified personnel to prevent personal injuries and property damage.
    • Special attention to stabilizers is critical; they must be securely installed before placing the diverter switch insert on supporting bars to avoid tilting.

    Transition Resistors and Leads Management

    • Transition resistors should be managed carefully during the installation; specific bolt connections (E, F, J) need to be removed.
    • Utilize proper tools and techniques to avoid damaging components, replacing or adjusting leads as necessary during disassembly.

    Installation of MD-Resistor Pack

    • Proper setup is essential for MD-resistor pack installation; adjustments for the height of transition resistors may vary.
    • Blocking nuts should be set precisely according to measurements to ensure compatibility with transition resistors.
    • Crane must be used to facilitate installation, ensuring smooth assembly without obstruction.

    Handling the Diverter Switch Insert

    • The diverter switch insert must be handled with care during placement to avoid crushing hazards, and deposit operations should occur in controlled steps.
    • The transition resistors must be placed properly without damaging the MD-resistor pack in the process.

    Final Steps for Component Replacement

    • Before removing the spring energy accumulator, bolts from specific connections must be addressed in sequential order to ensure stability.
    • Installation of lifting bolts on the top plate of the spring energy accumulator allows for safe removal using a crane, ensuring that all preparatory steps are meticulously followed.### Preparing the IEM
    • Ensure connections on the on-load tap-changer are performed correctly to avoid damage.
    • Remove all oil and grease from connection surfaces before installing bolted elements with OT30 or OT80 coatings.
    • Install bolted connections in one step, using specified tightening torque without re-tightening afterward.
    • If re-releasing a bolted connection, replace with new bolts or nuts, ensuring adhesive residues are cleaned.

    Roller Pin Replacement

    • Criteria for roller pin (cam roller) replacement are detailed in the maintenance manual.
    • If the installation includes an axial support ring (for shipments between April 25, 2016, and January 3, 2018), a new ring must be used; do not use one shipped after January 3, 2018.

    Energy Accumulator Spring Replacement

    • Removing the energy accumulator spring involves unscrewing an attachment bolt and removing a support pin.
    • The process requires the removal of sleeve bearings, dowel pin, washers, and the support ring before extracting the spring.
    • A new energy accumulator spring must be installed carefully according to specified dimensions.

    Adjusting Specified Value "L"

    • Setting and measuring the specified value "L" is crucial; understand that one full clockwise turn decreases the value by 1 mm and counterclockwise increases it by 1 mm.
    • Ensure that the dowel pin is aligned toward the energy accumulator carrier center after adjusting value "L".

    Installation of Spring Energy Accumulator and Drive Shaft

    • Installation should follow the reverse order of removal, ensuring that the IEM and components are correctly aligned in their basic positions.
    • Marks on the spring energy accumulator and IEM must match during installation.
    • Use bolt connections and set nuts carefully for secure assembly, utilizing a tool kit for proper installation.

    Setting Axial Play of Drive Shaft

    • The axial play of the drive shaft should be set between 0.1 - 0.3 mm, measured using a feeler gauge.
    • Fitting washers can adjust the axial play to the specified range.

    Installing Coupling Tube

    • Install the coupling tube in reverse order of removal, ensuring correct markings match during assembly.
    • The cam disk must be installed with appropriate attention to positioning for correct functioning.

    Transition Resistors and Connecting Leads

    • Strict adherence to safety protocols is required during the installation to prevent personal injury or equipment damage.
    • Complete bolt connections for resistor connecting leads, ensuring components are secured and positioned correctly.
    • Transition resistors should be positioned as closely as possible to the central shaft, facilitating accurate assembly.

    Safety and Preparation

    • Risk of personal injury or property damage exists if safety instructions are not followed by adequately trained personnel.
    • Thorough knowledge and experience are required for maintenance activities on on-load tap-changer types.
    • Removal of the diverter switch insert (or selector switch insert) is mandatory before beginning work.

    Inspection and Maintenance Procedure

    • Routine inspections must include coupling tube checks during each VACUTAP® Condition Assessment.
    • Coupling tube inspection steps:
      • Remove screws from the lower shielding ring and lift it.
      • Extract drive sleeves using pliers.
      • Remove and clean the coupling tube with transformer oil while adhering to oil quality standards.
      • Inspect for mechanical/electrical damage, such as leakage paths and discharge marks.
    • Ensure proper alignment of adjustment marks during reassembly of the coupling tube.

    Measuring Transition Resistances

    • Measure transition resistances during each inspection at designated measurement points.
    • Expected resistance values range from 0.1 to 30 ohms.
    • Deviations from nameplate values of up to ±10% are permissible; larger deviations require consultation with Technical Service.

    Checking Contact Wear and Replacement Criteria

    • Check contact wear on main contacts and replacement criteria during every maintenance cycle.
    • Document findings in the service report; oil compartment contacts replaced after 1,200,000 tap-change operations.
    • Measure wear width and depth:
      • Width on Diverter Switch Insert (DSI) and depth on oil compartment contacts.
      • Specific measurement criteria dictate replacement necessity based on assessed wear values.

    Tap-Change Operations and Maintenance Intervals

    • Monitor number of tap-change operations to determine maintenance intervals.
    • Specific wear measurement thresholds dictate whether contact replacement is necessary prior to scheduled maintenance.
    • Maintenance intervals outlined based on the number of operations:
      • 300,000, 600,000, and up to 1,200,000 operations require attention depending on wear metrics.

    Vacuum Interrupters Replacement

    • Replace vacuum interrupters after every 300,000 or 600,000 operations depending on the specific on-load tap-changer type.
    • Ensure correct transport and installation processes to prevent tipping and related hazards.
    • All necessary tools and materials should be prepared in advance for a smooth replacement operation, which includes vacuum interrupters and supporting structures.

    Tools and Materials Needed

    • Specific tools for the replacement process include various socket types, mounting devices, and auxiliary equipment.
    • Ensure that all connection elements are within specified torque limits to ensure safe and effective assembly.### Bolt Connection Elements
    • Different types of bolts listed include head bolts, half-round head bolts, Allen bolts, and hex head bolts.
    • Common sizes for bolts include M5, M6, and M8, with varying lengths such as 12 mm, 14 mm, 20 mm, and 40 mm.
    • Torque values range from 4.5 Nm for Allen bolts to 20 Nm for hex head bolts.
    • Components accompanying bolts include washers (both standard and spring), square nuts, and dowel pins.

    Removing Vacuum Interrupters

    • Ensure diverter switch insert and new interruptor exchange module (IEM) are in the basic position before starting the work.
    • Diverter switch insert must have the main contact visible on one side while the other side remains empty to indicate proper orientation.
    • Use a crane for the extraction of the diverter switch insert and ensure all necessary components, like the lower retaining ring and selector coupling, are removed in order.

    Risks During Operation

    • Installation and removal of components should be done only by qualified personnel to prevent personal injuries and property damage.
    • Special attention to stabilizers is critical; they must be securely installed before placing the diverter switch insert on supporting bars to avoid tilting.

    Transition Resistors and Leads Management

    • Transition resistors should be managed carefully during the installation; specific bolt connections (E, F, J) need to be removed.
    • Utilize proper tools and techniques to avoid damaging components, replacing or adjusting leads as necessary during disassembly.

    Installation of MD-Resistor Pack

    • Proper setup is essential for MD-resistor pack installation; adjustments for the height of transition resistors may vary.
    • Blocking nuts should be set precisely according to measurements to ensure compatibility with transition resistors.
    • Crane must be used to facilitate installation, ensuring smooth assembly without obstruction.

    Handling the Diverter Switch Insert

    • The diverter switch insert must be handled with care during placement to avoid crushing hazards, and deposit operations should occur in controlled steps.
    • The transition resistors must be placed properly without damaging the MD-resistor pack in the process.

    Final Steps for Component Replacement

    • Before removing the spring energy accumulator, bolts from specific connections must be addressed in sequential order to ensure stability.
    • Installation of lifting bolts on the top plate of the spring energy accumulator allows for safe removal using a crane, ensuring that all preparatory steps are meticulously followed.### Preparing the IEM
    • Ensure connections on the on-load tap-changer are performed correctly to avoid damage.
    • Remove all oil and grease from connection surfaces before installing bolted elements with OT30 or OT80 coatings.
    • Install bolted connections in one step, using specified tightening torque without re-tightening afterward.
    • If re-releasing a bolted connection, replace with new bolts or nuts, ensuring adhesive residues are cleaned.

    Roller Pin Replacement

    • Criteria for roller pin (cam roller) replacement are detailed in the maintenance manual.
    • If the installation includes an axial support ring (for shipments between April 25, 2016, and January 3, 2018), a new ring must be used; do not use one shipped after January 3, 2018.

    Energy Accumulator Spring Replacement

    • Removing the energy accumulator spring involves unscrewing an attachment bolt and removing a support pin.
    • The process requires the removal of sleeve bearings, dowel pin, washers, and the support ring before extracting the spring.
    • A new energy accumulator spring must be installed carefully according to specified dimensions.

    Adjusting Specified Value "L"

    • Setting and measuring the specified value "L" is crucial; understand that one full clockwise turn decreases the value by 1 mm and counterclockwise increases it by 1 mm.
    • Ensure that the dowel pin is aligned toward the energy accumulator carrier center after adjusting value "L".

    Installation of Spring Energy Accumulator and Drive Shaft

    • Installation should follow the reverse order of removal, ensuring that the IEM and components are correctly aligned in their basic positions.
    • Marks on the spring energy accumulator and IEM must match during installation.
    • Use bolt connections and set nuts carefully for secure assembly, utilizing a tool kit for proper installation.

    Setting Axial Play of Drive Shaft

    • The axial play of the drive shaft should be set between 0.1 - 0.3 mm, measured using a feeler gauge.
    • Fitting washers can adjust the axial play to the specified range.

    Installing Coupling Tube

    • Install the coupling tube in reverse order of removal, ensuring correct markings match during assembly.
    • The cam disk must be installed with appropriate attention to positioning for correct functioning.

    Transition Resistors and Connecting Leads

    • Strict adherence to safety protocols is required during the installation to prevent personal injury or equipment damage.
    • Complete bolt connections for resistor connecting leads, ensuring components are secured and positioned correctly.
    • Transition resistors should be positioned as closely as possible to the central shaft, facilitating accurate assembly.

    Safety and Preparation

    • Risk of personal injury or property damage exists if safety instructions are not followed by adequately trained personnel.
    • Thorough knowledge and experience are required for maintenance activities on on-load tap-changer types.
    • Removal of the diverter switch insert (or selector switch insert) is mandatory before beginning work.

    Inspection and Maintenance Procedure

    • Routine inspections must include coupling tube checks during each VACUTAP® Condition Assessment.
    • Coupling tube inspection steps:
      • Remove screws from the lower shielding ring and lift it.
      • Extract drive sleeves using pliers.
      • Remove and clean the coupling tube with transformer oil while adhering to oil quality standards.
      • Inspect for mechanical/electrical damage, such as leakage paths and discharge marks.
    • Ensure proper alignment of adjustment marks during reassembly of the coupling tube.

    Measuring Transition Resistances

    • Measure transition resistances during each inspection at designated measurement points.
    • Expected resistance values range from 0.1 to 30 ohms.
    • Deviations from nameplate values of up to ±10% are permissible; larger deviations require consultation with Technical Service.

    Checking Contact Wear and Replacement Criteria

    • Check contact wear on main contacts and replacement criteria during every maintenance cycle.
    • Document findings in the service report; oil compartment contacts replaced after 1,200,000 tap-change operations.
    • Measure wear width and depth:
      • Width on Diverter Switch Insert (DSI) and depth on oil compartment contacts.
      • Specific measurement criteria dictate replacement necessity based on assessed wear values.

    Tap-Change Operations and Maintenance Intervals

    • Monitor number of tap-change operations to determine maintenance intervals.
    • Specific wear measurement thresholds dictate whether contact replacement is necessary prior to scheduled maintenance.
    • Maintenance intervals outlined based on the number of operations:
      • 300,000, 600,000, and up to 1,200,000 operations require attention depending on wear metrics.

    Vacuum Interrupters Replacement

    • Replace vacuum interrupters after every 300,000 or 600,000 operations depending on the specific on-load tap-changer type.
    • Ensure correct transport and installation processes to prevent tipping and related hazards.
    • All necessary tools and materials should be prepared in advance for a smooth replacement operation, which includes vacuum interrupters and supporting structures.

    Tools and Materials Needed

    • Specific tools for the replacement process include various socket types, mounting devices, and auxiliary equipment.
    • Ensure that all connection elements are within specified torque limits to ensure safe and effective assembly.### Bolt Connection Elements
    • Different types of bolts listed include head bolts, half-round head bolts, Allen bolts, and hex head bolts.
    • Common sizes for bolts include M5, M6, and M8, with varying lengths such as 12 mm, 14 mm, 20 mm, and 40 mm.
    • Torque values range from 4.5 Nm for Allen bolts to 20 Nm for hex head bolts.
    • Components accompanying bolts include washers (both standard and spring), square nuts, and dowel pins.

    Removing Vacuum Interrupters

    • Ensure diverter switch insert and new interruptor exchange module (IEM) are in the basic position before starting the work.
    • Diverter switch insert must have the main contact visible on one side while the other side remains empty to indicate proper orientation.
    • Use a crane for the extraction of the diverter switch insert and ensure all necessary components, like the lower retaining ring and selector coupling, are removed in order.

    Risks During Operation

    • Installation and removal of components should be done only by qualified personnel to prevent personal injuries and property damage.
    • Special attention to stabilizers is critical; they must be securely installed before placing the diverter switch insert on supporting bars to avoid tilting.

    Transition Resistors and Leads Management

    • Transition resistors should be managed carefully during the installation; specific bolt connections (E, F, J) need to be removed.
    • Utilize proper tools and techniques to avoid damaging components, replacing or adjusting leads as necessary during disassembly.

    Installation of MD-Resistor Pack

    • Proper setup is essential for MD-resistor pack installation; adjustments for the height of transition resistors may vary.
    • Blocking nuts should be set precisely according to measurements to ensure compatibility with transition resistors.
    • Crane must be used to facilitate installation, ensuring smooth assembly without obstruction.

    Handling the Diverter Switch Insert

    • The diverter switch insert must be handled with care during placement to avoid crushing hazards, and deposit operations should occur in controlled steps.
    • The transition resistors must be placed properly without damaging the MD-resistor pack in the process.

    Final Steps for Component Replacement

    • Before removing the spring energy accumulator, bolts from specific connections must be addressed in sequential order to ensure stability.
    • Installation of lifting bolts on the top plate of the spring energy accumulator allows for safe removal using a crane, ensuring that all preparatory steps are meticulously followed.### Preparing the IEM
    • Ensure connections on the on-load tap-changer are performed correctly to avoid damage.
    • Remove all oil and grease from connection surfaces before installing bolted elements with OT30 or OT80 coatings.
    • Install bolted connections in one step, using specified tightening torque without re-tightening afterward.
    • If re-releasing a bolted connection, replace with new bolts or nuts, ensuring adhesive residues are cleaned.

    Roller Pin Replacement

    • Criteria for roller pin (cam roller) replacement are detailed in the maintenance manual.
    • If the installation includes an axial support ring (for shipments between April 25, 2016, and January 3, 2018), a new ring must be used; do not use one shipped after January 3, 2018.

    Energy Accumulator Spring Replacement

    • Removing the energy accumulator spring involves unscrewing an attachment bolt and removing a support pin.
    • The process requires the removal of sleeve bearings, dowel pin, washers, and the support ring before extracting the spring.
    • A new energy accumulator spring must be installed carefully according to specified dimensions.

    Adjusting Specified Value "L"

    • Setting and measuring the specified value "L" is crucial; understand that one full clockwise turn decreases the value by 1 mm and counterclockwise increases it by 1 mm.
    • Ensure that the dowel pin is aligned toward the energy accumulator carrier center after adjusting value "L".

    Installation of Spring Energy Accumulator and Drive Shaft

    • Installation should follow the reverse order of removal, ensuring that the IEM and components are correctly aligned in their basic positions.
    • Marks on the spring energy accumulator and IEM must match during installation.
    • Use bolt connections and set nuts carefully for secure assembly, utilizing a tool kit for proper installation.

    Setting Axial Play of Drive Shaft

    • The axial play of the drive shaft should be set between 0.1 - 0.3 mm, measured using a feeler gauge.
    • Fitting washers can adjust the axial play to the specified range.

    Installing Coupling Tube

    • Install the coupling tube in reverse order of removal, ensuring correct markings match during assembly.
    • The cam disk must be installed with appropriate attention to positioning for correct functioning.

    Transition Resistors and Connecting Leads

    • Strict adherence to safety protocols is required during the installation to prevent personal injury or equipment damage.
    • Complete bolt connections for resistor connecting leads, ensuring components are secured and positioned correctly.
    • Transition resistors should be positioned as closely as possible to the central shaft, facilitating accurate assembly.

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    Description

    This quiz focuses on the essential safety and hazard information outlined in operating instructions for machinery. It emphasizes the importance of qualified personnel and adherence to safety protocols to prevent personal injury and property damage. Understanding these instructions is critical for safe operations.

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