Podcast
Questions and Answers
It is necessary to observe safety instructions when performing work on the on-load tap-changer.
It is necessary to observe safety instructions when performing work on the on-load tap-changer.
True
What is the part number for the cover gasket?
What is the part number for the cover gasket?
860258
What is the designation of the part used for the replacement drive shaft?
What is the designation of the part used for the replacement drive shaft?
O-ring gasket 16x4
What should you do if irregularities are detected concerning the latched condition or the position of the levers?
What should you do if irregularities are detected concerning the latched condition or the position of the levers?
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The energy accumulator must be checked during each maintenance and each VACUTAP® _____ assessment.
The energy accumulator must be checked during each maintenance and each VACUTAP® _____ assessment.
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What is the torque setting for retightening bolts on TTF/MTF?
What is the torque setting for retightening bolts on TTF/MTF?
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What color is the adjustment mark used for aligning the coupling tube?
What color is the adjustment mark used for aligning the coupling tube?
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What tool is used to place the retaining ring?
What tool is used to place the retaining ring?
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The replacement of the connecting lead must be performed once for diverter switch inserts with production finish date up to __________.
The replacement of the connecting lead must be performed once for diverter switch inserts with production finish date up to __________.
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Fitting washers are not installed under the retaining ring.
Fitting washers are not installed under the retaining ring.
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What is the maximum number of operations after which the cocking sledge of the energy accumulator should be replaced?
What is the maximum number of operations after which the cocking sledge of the energy accumulator should be replaced?
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The tightening torque for the bolt connection at the transition resistor is _______ Nm.
The tightening torque for the bolt connection at the transition resistor is _______ Nm.
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Which material is required for replacing the cocking sledge of the energy accumulator? (Select all that apply)
Which material is required for replacing the cocking sledge of the energy accumulator? (Select all that apply)
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What type of connection must the replacement of the connecting lead between resistor pack and MTF always be combined with?
What type of connection must the replacement of the connecting lead between resistor pack and MTF always be combined with?
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The old bolt connection at the spacer pin can continue to be used after 1 February, 2023.
The old bolt connection at the spacer pin can continue to be used after 1 February, 2023.
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What should be removed from all connection surfaces before installing bolted connections with OT30 or OT80 coating?
What should be removed from all connection surfaces before installing bolted connections with OT30 or OT80 coating?
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What is the torque specification for retightening bolts in sector S1 on TDCb/MDCb?
What is the torque specification for retightening bolts in sector S1 on TDCb/MDCb?
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What should be done to check the tight seat of glue bolts?
What should be done to check the tight seat of glue bolts?
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What tool is used to hold the nut while retightening bolts?
What tool is used to hold the nut while retightening bolts?
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What is the maximum permitted deviation from the desired transition resistance value?
What is the maximum permitted deviation from the desired transition resistance value?
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Match the following components with their torque specifications:
Match the following components with their torque specifications:
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What is the correct torque for tightening new bolts?
What is the correct torque for tightening new bolts?
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What type of bolt coating is used for the connection?
What type of bolt coating is used for the connection?
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It is permitted to retighten glue bolts after installation.
It is permitted to retighten glue bolts after installation.
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What must be done to bolts and nuts with OT30 or OT80 coating before installation?
What must be done to bolts and nuts with OT30 or OT80 coating before installation?
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During each inspection, what must be checked with the diverter switch inserts?
During each inspection, what must be checked with the diverter switch inserts?
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What must be removed from the new IEM before installation?
What must be removed from the new IEM before installation?
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Bolted connections with OT30 or OT80 coating can be installed with oil and grease present.
Bolted connections with OT30 or OT80 coating can be installed with oil and grease present.
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What must be secured with DELO-DUOPOX AD895?
What must be secured with DELO-DUOPOX AD895?
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The top edge of the selector drive shaft must be _____ higher than the top edge of the coupling flange.
The top edge of the selector drive shaft must be _____ higher than the top edge of the coupling flange.
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When should the cocking sledge of the energy accumulator be replaced?
When should the cocking sledge of the energy accumulator be replaced?
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Which tool is listed for replacing the cocking sledge of the energy accumulator?
Which tool is listed for replacing the cocking sledge of the energy accumulator?
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What should be done if the check sizes are not within the required values?
What should be done if the check sizes are not within the required values?
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Red marks on the energy accumulator holder and coupling shaft must match at all stages of installation.
Red marks on the energy accumulator holder and coupling shaft must match at all stages of installation.
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The activity must be performed once for diverter switch inserts with production finish date up to 17 August, 2020.
The activity must be performed once for diverter switch inserts with production finish date up to 17 August, 2020.
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What must be performed during the next replacement of the IEM?
What must be performed during the next replacement of the IEM?
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What danger is mentioned regarding incorrectly performed bolt connection?
What danger is mentioned regarding incorrectly performed bolt connection?
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The spacer pin is kept in position by an integrated ______ lock on its base.
The spacer pin is kept in position by an integrated ______ lock on its base.
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The replacement of the connecting lead can be performed independently of the IEM replacement.
The replacement of the connecting lead can be performed independently of the IEM replacement.
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When using bolts and nuts with OT30 or OT80 coating, what should be ensured?
When using bolts and nuts with OT30 or OT80 coating, what should be ensured?
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What must be removed from connection surfaces before bolting?
What must be removed from connection surfaces before bolting?
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When should vacuum interrupters be replaced?
When should vacuum interrupters be replaced?
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What is the purpose of removing glue residue from internal threads?
What is the purpose of removing glue residue from internal threads?
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What must be used for the modification of vacuum interrupters?
What must be used for the modification of vacuum interrupters?
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What should be done if a tap-change supervisory control is installed?
What should be done if a tap-change supervisory control is installed?
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Each element of the bolt connections should be replaced with a new one.
Each element of the bolt connections should be replaced with a new one.
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What torque is specified for the hex head bolt of type C1?
What torque is specified for the hex head bolt of type C1?
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Materials for modifications will be provided by the _____.
Materials for modifications will be provided by the _____.
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Which tool is used for removing vacuum interrupters?
Which tool is used for removing vacuum interrupters?
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What type of bolt connection is referred to as C4?
What type of bolt connection is referred to as C4?
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What documentation number is associated with the glue used?
What documentation number is associated with the glue used?
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There is a risk of personal damage or injury if maintenance work is performed by qualified personnel.
There is a risk of personal damage or injury if maintenance work is performed by qualified personnel.
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Which of the following items is part of the spare parts list for the VACUTAP® VR?
Which of the following items is part of the spare parts list for the VACUTAP® VR?
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During each maintenance, the latching condition of the diverter switch inserts type VACUTAP® VR® model _____ must be checked.
During each maintenance, the latching condition of the diverter switch inserts type VACUTAP® VR® model _____ must be checked.
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What should you wear when grabbing the upper shielding ring of the coupling shaft?
What should you wear when grabbing the upper shielding ring of the coupling shaft?
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What must be checked for damage on the on-load tap-changer during test tap-change operations?
What must be checked for damage on the on-load tap-changer during test tap-change operations?
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What are the two defined positions that TTF and MTF levers must have?
What are the two defined positions that TTF and MTF levers must have?
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When refitting the coupling tube, ensure alignment of the _____ adjustment mark.
When refitting the coupling tube, ensure alignment of the _____ adjustment mark.
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The bolt connections must be checked during each inspection and each VACUTAP® Condition Assessment when energized.
The bolt connections must be checked during each inspection and each VACUTAP® Condition Assessment when energized.
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How should bolts on TTF/MTF be retightened?
How should bolts on TTF/MTF be retightened?
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What must be checked during each inspection/maintenance of diverter switch inserts type VACUTAP® VR® model 2010?
What must be checked during each inspection/maintenance of diverter switch inserts type VACUTAP® VR® model 2010?
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The retightening torque for bolts on TDCb/MDCb is _____ Nm.
The retightening torque for bolts on TDCb/MDCb is _____ Nm.
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The retightening torque for bolts on TTVa is _____ Nm.
The retightening torque for bolts on TTVa is _____ Nm.
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It is permitted to retighten glue bolts with OT30 or OT80 coating.
It is permitted to retighten glue bolts with OT30 or OT80 coating.
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What should be checked visually and tactilely in relation to bolt connections?
What should be checked visually and tactilely in relation to bolt connections?
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Which of the following is a requirement when using bolts and nuts with OT coating?
Which of the following is a requirement when using bolts and nuts with OT coating?
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The installation of retaining rings during maintenance must not exceed an inner diameter of _____ mm.
The installation of retaining rings during maintenance must not exceed an inner diameter of _____ mm.
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What type of pliers should be used for removing retaining rings?
What type of pliers should be used for removing retaining rings?
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The activity must be performed once for diverter switch inserts with production finish date after 17 August, 2020.
The activity must be performed once for diverter switch inserts with production finish date after 17 August, 2020.
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Which replacements must be performed during the next replacement of the IEM?
Which replacements must be performed during the next replacement of the IEM?
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What must be ensured when using bolts and nuts with OT30 or OT80 coating?
What must be ensured when using bolts and nuts with OT30 or OT80 coating?
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Loosening the bolt of the bolt connection does not affect the spacer pin.
Loosening the bolt of the bolt connection does not affect the spacer pin.
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Live connections performed incorrectly can damage the ______.
Live connections performed incorrectly can damage the ______.
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The first step in replacing the cocking sledge of the energy accumulator is to remove the _____ from the resistor pack.
The first step in replacing the cocking sledge of the energy accumulator is to remove the _____ from the resistor pack.
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What should be ensured when installing the new retaining ring?
What should be ensured when installing the new retaining ring?
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The replacement of the connecting lead can be performed independently from the IEM replacement.
The replacement of the connecting lead can be performed independently from the IEM replacement.
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What is the maximum number of operations after which the cocking sledge of the energy accumulator must be replaced?
What is the maximum number of operations after which the cocking sledge of the energy accumulator must be replaced?
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Match the following material descriptions with their corresponding part numbers for the replacement of connecting lead MTF to transition resistor:
Match the following material descriptions with their corresponding part numbers for the replacement of connecting lead MTF to transition resistor:
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What must be installed before lifting the IEM?
What must be installed before lifting the IEM?
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What is the specified tightening torque for the bolt connection at the transition resistor?
What is the specified tightening torque for the bolt connection at the transition resistor?
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All red parts of the new IEM must be removed before installation.
All red parts of the new IEM must be removed before installation.
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Which of these tasks must be performed when replacing the connecting lead between resistor pack and MTF?
Which of these tasks must be performed when replacing the connecting lead between resistor pack and MTF?
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What should be ensured when using bolts and nuts with OT30 or OT80 coating?
What should be ensured when using bolts and nuts with OT30 or OT80 coating?
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What must be secured with DELO-DUOPOX AD895?
What must be secured with DELO-DUOPOX AD895?
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After gluing the C12 bolt connection, wait _____ hours before filling the diverter switch oil compartment.
After gluing the C12 bolt connection, wait _____ hours before filling the diverter switch oil compartment.
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When replacing the cocking sledge for diverter switch inserts, which date must be taken into account?
When replacing the cocking sledge for diverter switch inserts, which date must be taken into account?
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What must the upper edge of the selector drive shaft be compared to the coupling flange?
What must the upper edge of the selector drive shaft be compared to the coupling flange?
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The two rollers can be combined randomly when adjusting dimensions.
The two rollers can be combined randomly when adjusting dimensions.
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What is the general rule for replacing vacuum interrupters?
What is the general rule for replacing vacuum interrupters?
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At what point can the vacuum interrupters be replaced at the earliest?
At what point can the vacuum interrupters be replaced at the earliest?
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Which material is included in the replacement kit for vacuum interrupters?
Which material is included in the replacement kit for vacuum interrupters?
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You should replace all elements of the bolt connections with new ones.
You should replace all elements of the bolt connections with new ones.
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What is the torque specification for a Hex.head bolt M8?
What is the torque specification for a Hex.head bolt M8?
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Match the following element types with their specifications:
Match the following element types with their specifications:
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What item is used to secure connections during assembly?
What item is used to secure connections during assembly?
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What is the torque for retightening bolts on TDCb/MDCb?
What is the torque for retightening bolts on TDCb/MDCb?
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What tools are used to tighten bolts on TTVb top edge?
What tools are used to tighten bolts on TTVb top edge?
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It is permitted to retighten glue bolts with OT30 or OT80 coating.
It is permitted to retighten glue bolts with OT30 or OT80 coating.
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What must be visually inspected during the bolt connection check?
What must be visually inspected during the bolt connection check?
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What is the tightening torque for bolts in sectors S1 and S3?
What is the tightening torque for bolts in sectors S1 and S3?
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What must always be ensured when using bolts and nuts with OT30 or OT80 coating?
What must always be ensured when using bolts and nuts with OT30 or OT80 coating?
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What is the maximum inner diameter that retaining rings should not exceed during installation?
What is the maximum inner diameter that retaining rings should not exceed during installation?
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How many Allen bolts OT30-8 are required for a 1-sector diverter switch insert?
How many Allen bolts OT30-8 are required for a 1-sector diverter switch insert?
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What measures must be performed during each inspection/maintenance and each VACUTAP® Condition Assessment?
What measures must be performed during each inspection/maintenance and each VACUTAP® Condition Assessment?
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The activity must be performed for diverter switch inserts with production finish date up to 17 August, 2020.
The activity must be performed for diverter switch inserts with production finish date up to 17 August, 2020.
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When must the replacement of the connecting lead between resistor pack and MTF or MDC be performed?
When must the replacement of the connecting lead between resistor pack and MTF or MDC be performed?
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The spacer pin is kept in position by an integrated rotation lock on its base.
The spacer pin is kept in position by an integrated rotation lock on its base.
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What can happen if the bolt connection is incorrectly performed during the replacement of the connecting lead?
What can happen if the bolt connection is incorrectly performed during the replacement of the connecting lead?
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When using bolts and nuts with OT30 or OT80 coating, always make sure that the bolted connection elements are free of ______.
When using bolts and nuts with OT30 or OT80 coating, always make sure that the bolted connection elements are free of ______.
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How often must the vacuum interrupters be replaced?
How often must the vacuum interrupters be replaced?
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What must be done after 580,000 operations?
What must be done after 580,000 operations?
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The instructions specify to replace every element of the bolt connections with a new one.
The instructions specify to replace every element of the bolt connections with a new one.
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Which part is not to be replaced according to the connection elements instructions?
Which part is not to be replaced according to the connection elements instructions?
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What is the torque spec for C4 bolt connections?
What is the torque spec for C4 bolt connections?
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Which tool is used to split nuts during removal?
Which tool is used to split nuts during removal?
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What should be checked before proceeding with the removal of the coupling shaft?
What should be checked before proceeding with the removal of the coupling shaft?
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The glue used for securing connections is _____.
The glue used for securing connections is _____.
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How many lifting eye bolts are required in the tools?
How many lifting eye bolts are required in the tools?
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If work is performed by insufficiently qualified personnel, there is a risk of personal damage or injury.
If work is performed by insufficiently qualified personnel, there is a risk of personal damage or injury.
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Which components must be removed before performing work on the diverter switch insert?
Which components must be removed before performing work on the diverter switch insert?
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What type of maintenance requires profound knowledge and experience from personnel?
What type of maintenance requires profound knowledge and experience from personnel?
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The drive shaft is labeled as VR ____ NM.
The drive shaft is labeled as VR ____ NM.
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What should be checked during the latching condition inspection of the diverter switch insert?
What should be checked during the latching condition inspection of the diverter switch insert?
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How many bolts need to be removed to inspect the coupling tube?
How many bolts need to be removed to inspect the coupling tube?
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The energy accumulator has both a locking pawl and a cocking sledge insert.
The energy accumulator has both a locking pawl and a cocking sledge insert.
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What is the torque specification for tightening the TTF/MTF bolts?
What is the torque specification for tightening the TTF/MTF bolts?
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When refitting the coupling tube, ensure alignment of the red adjustment mark and the adjustment mark on the _____ switch insert.
When refitting the coupling tube, ensure alignment of the red adjustment mark and the adjustment mark on the _____ switch insert.
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What should be taken care of when removing the retaining ring?
What should be taken care of when removing the retaining ring?
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The retaining ring pliers A11 should be placed in the same way for both sides.
The retaining ring pliers A11 should be placed in the same way for both sides.
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What date signifies when replacement should be performed on the cocking sledge of the energy accumulator?
What date signifies when replacement should be performed on the cocking sledge of the energy accumulator?
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What coating should be free of oil and grease before performing a bolted connection?
What coating should be free of oil and grease before performing a bolted connection?
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The material required for the replacement must be provided via _____ by the responsible OPS before work begins.
The material required for the replacement must be provided via _____ by the responsible OPS before work begins.
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What is the new bolt type used at the spacer pin connection starting from February 1, 2023?
What is the new bolt type used at the spacer pin connection starting from February 1, 2023?
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What is the purpose of replacing the connecting lead between the resistor pack and MTF?
What is the purpose of replacing the connecting lead between the resistor pack and MTF?
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Match the following materials with their part numbers:
Match the following materials with their part numbers:
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The connecting lead must be installed at a 90° angle to the transition resistor.
The connecting lead must be installed at a 90° angle to the transition resistor.
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What should be checked before installing new vacuum interrupters?
What should be checked before installing new vacuum interrupters?
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Which parts must be removed from the new IEM before installation?
Which parts must be removed from the new IEM before installation?
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The old IEM transport protection should be removed if the old IEM is sent back.
The old IEM transport protection should be removed if the old IEM is sent back.
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What coating should bolts and nuts have when connecting elements?
What coating should bolts and nuts have when connecting elements?
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What must be done after securing the C12 connections?
What must be done after securing the C12 connections?
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What should be replaced one at a time after unscrewing C6 connections?
What should be replaced one at a time after unscrewing C6 connections?
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A cocking sledge must be replaced if the old DSI was delivered after October 2011.
A cocking sledge must be replaced if the old DSI was delivered after October 2011.
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The top edge of the selector drive shaft must be ____ higher than the top edge of the coupling flange.
The top edge of the selector drive shaft must be ____ higher than the top edge of the coupling flange.
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How often must the replacement of the cocking sledge be performed for diverter switch inserts with a finish date up to October 31, 2011?
How often must the replacement of the cocking sledge be performed for diverter switch inserts with a finish date up to October 31, 2011?
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What happens if the required dimensions cannot be kept while varying the number of rollers at C3?
What happens if the required dimensions cannot be kept while varying the number of rollers at C3?
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What is the torque setting for retightening bolts in sector S1 on TDCb/MDCb?
What is the torque setting for retightening bolts in sector S1 on TDCb/MDCb?
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What should be used to check tight seat of bolt connections?
What should be used to check tight seat of bolt connections?
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What type of coating is mentioned for glue bolts used in bolted connections?
What type of coating is mentioned for glue bolts used in bolted connections?
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How often should the measures for checking bolt connections be performed?
How often should the measures for checking bolt connections be performed?
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What is the required tightening torque for bolts on TTVb top edge?
What is the required tightening torque for bolts on TTVb top edge?
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Retighten bolts on TTVb bottom edge to _____ Nm.
Retighten bolts on TTVb bottom edge to _____ Nm.
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It is permitted to retighten glue bolts with OT30 or OT80 coating.
It is permitted to retighten glue bolts with OT30 or OT80 coating.
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Which tool is recommended for tightening bolts?
Which tool is recommended for tightening bolts?
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Performing work without qualified personnel can lead to personal damage or equipment malfunction.
Performing work without qualified personnel can lead to personal damage or equipment malfunction.
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What should be checked regarding the actuating cams for vacuum interrupters MSV/TTV?
What should be checked regarding the actuating cams for vacuum interrupters MSV/TTV?
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What is the purpose of the drive shaft VR 1100NM?
What is the purpose of the drive shaft VR 1100NM?
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The energy accumulator has both a locking pawl and a _____ on the left-hand side.
The energy accumulator has both a locking pawl and a _____ on the left-hand side.
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What must be done prior to removing the coupling tube from the diverter switch insert?
What must be done prior to removing the coupling tube from the diverter switch insert?
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What must be ensured when refitting the coupling tube?
What must be ensured when refitting the coupling tube?
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What is the required torque for retightening bolts on TTF/MTF?
What is the required torque for retightening bolts on TTF/MTF?
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What does the gap between the locking pawl and the cocking slide insert indicate?
What does the gap between the locking pawl and the cocking slide insert indicate?
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The inspection of the coupling tube must be performed during each VACUTAP® Condition Assessment.
The inspection of the coupling tube must be performed during each VACUTAP® Condition Assessment.
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What should be removed alongside the cable tie when attaching the cable?
What should be removed alongside the cable tie when attaching the cable?
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What is crucial to ensure while removing the retaining ring?
What is crucial to ensure while removing the retaining ring?
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New retaining rings should be installed in a loose manner.
New retaining rings should be installed in a loose manner.
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What must be performed during maintenance on the diverter switch?
What must be performed during maintenance on the diverter switch?
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What is the minimum number of operations after which the cocking sledge must be replaced?
What is the minimum number of operations after which the cocking sledge must be replaced?
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What is a risk when replacing the connecting lead without replacing the IEM?
What is a risk when replacing the connecting lead without replacing the IEM?
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What angle should the connecting lead be positioned during installation?
What angle should the connecting lead be positioned during installation?
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The tightening torque for installing the new connecting lead at the transition resistor is _____ Nm.
The tightening torque for installing the new connecting lead at the transition resistor is _____ Nm.
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What is no longer used in the bolt connection at the spacer pin after 1 February, 2023?
What is no longer used in the bolt connection at the spacer pin after 1 February, 2023?
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What is the part number for the new hex head bolt used from 1 February, 2023?
What is the part number for the new hex head bolt used from 1 February, 2023?
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What is the recommended interval for replacing vacuum interrupters?
What is the recommended interval for replacing vacuum interrupters?
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What materials are provided for the vacuum interrupter modification?
What materials are provided for the vacuum interrupter modification?
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The first publication date for the materials indicates they are reliable.
The first publication date for the materials indicates they are reliable.
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Replacement of vacuum interrupters is directed after every _____ operations.
Replacement of vacuum interrupters is directed after every _____ operations.
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Match the following tools with their descriptions:
Match the following tools with their descriptions:
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Which connection elements should not be replaced?
Which connection elements should not be replaced?
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What should be checked for the actuating cams for vacuum interrupters?
What should be checked for the actuating cams for vacuum interrupters?
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The activity must be performed once for diverter switch inserts with production finish date up to 17 August, 2020.
The activity must be performed once for diverter switch inserts with production finish date up to 17 August, 2020.
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What must the replacement of the connecting lead be performed in combination with?
What must the replacement of the connecting lead be performed in combination with?
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What can happen if the connecting lead is replaced without replacing the IEM?
What can happen if the connecting lead is replaced without replacing the IEM?
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The spacer pin is kept in position by an integrated ______ lock.
The spacer pin is kept in position by an integrated ______ lock.
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Damage to on-load tap-changer can occur if live connections are performed incorrectly.
Damage to on-load tap-changer can occur if live connections are performed incorrectly.
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What should be removed from all connection surfaces?
What should be removed from all connection surfaces?
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What should be done with the lifting eye bolts in the energy accumulator holder?
What should be done with the lifting eye bolts in the energy accumulator holder?
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All red parts must be removed from the new IEM, indicating these parts were for ______.
All red parts must be removed from the new IEM, indicating these parts were for ______.
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Bolts and nuts with OT30 or OT80 coating can be installed if they are oily or greasy.
Bolts and nuts with OT30 or OT80 coating can be installed if they are oily or greasy.
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What should be done if a bolted connection must be released again?
What should be done if a bolted connection must be released again?
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How long should you wait after gluing the C12 bolt connection before filling the oil compartment?
How long should you wait after gluing the C12 bolt connection before filling the oil compartment?
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What must be replaced if the old DSI was delivered before October 2011 and has reached 300,000 operations?
What must be replaced if the old DSI was delivered before October 2011 and has reached 300,000 operations?
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What should the top edge of the selector drive shaft be higher than?
What should the top edge of the selector drive shaft be higher than?
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The selector drive shaft can be installed without ensuring the marking holes match.
The selector drive shaft can be installed without ensuring the marking holes match.
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At what operation count should the cocking sledge of the energy accumulator be replaced at the earliest?
At what operation count should the cocking sledge of the energy accumulator be replaced at the earliest?
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The old DSI must be replaced during maintenance after ______ operations.
The old DSI must be replaced during maintenance after ______ operations.
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What should you use to measure check sizes on the DSI?
What should you use to measure check sizes on the DSI?
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It is safe to perform work without observing safety instructions.
It is safe to perform work without observing safety instructions.
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Which of the following parts is used for the maintenance of the OLTC?
Which of the following parts is used for the maintenance of the OLTC?
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What must be checked before performing test tap-change operations?
What must be checked before performing test tap-change operations?
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The gap formed when the locking pawl is _______ is marked 'd'.
The gap formed when the locking pawl is _______ is marked 'd'.
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What should be done during each maintenance regarding the latching condition?
What should be done during each maintenance regarding the latching condition?
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How many screws hold the lower shielding ring?
How many screws hold the lower shielding ring?
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Match the maintenance practices with their descriptions:
Match the maintenance practices with their descriptions:
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What is the torque to which bolts in sector S1 on TDCb/MDCb should be retightened?
What is the torque to which bolts in sector S1 on TDCb/MDCb should be retightened?
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What is required to check the tight seat of bolt connections?
What is required to check the tight seat of bolt connections?
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Which sizes of open-end wrenches are needed to hold the nut while retightening bolts on TTVb?
Which sizes of open-end wrenches are needed to hold the nut while retightening bolts on TTVb?
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What must be done to the vacuum interrupter before measuring transition resistance?
What must be done to the vacuum interrupter before measuring transition resistance?
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Retightening of bolts should be performed after the VACUTAP® Condition Assessment.
Retightening of bolts should be performed after the VACUTAP® Condition Assessment.
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What is the maximum inner diameter to which the retaining ring should be opened during installation?
What is the maximum inner diameter to which the retaining ring should be opened during installation?
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What is the torque for the bolt on TTVb bottom edge?
What is the torque for the bolt on TTVb bottom edge?
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Which of the following materials is needed to replace the bolt connection of commutation contacts?
Which of the following materials is needed to replace the bolt connection of commutation contacts?
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When should the replacement of retaining rings at the energy accumulator latch be performed?
When should the replacement of retaining rings at the energy accumulator latch be performed?
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What tool is used to remove the retaining ring?
What tool is used to remove the retaining ring?
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The second retaining ring is more difficult to reach on side ______.
The second retaining ring is more difficult to reach on side ______.
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Fitting washers should be removed when removing the retaining ring.
Fitting washers should be removed when removing the retaining ring.
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When must the cocking sledge of the energy accumulator be replaced?
When must the cocking sledge of the energy accumulator be replaced?
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What must be performed during the next replacement of the IEM?
What must be performed during the next replacement of the IEM?
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The spacer pin can become loosened when loosening the bolt connection.
The spacer pin can become loosened when loosening the bolt connection.
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What should be ensured about the bolted connection elements when using OT30 or OT80 coating?
What should be ensured about the bolted connection elements when using OT30 or OT80 coating?
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Match the following materials with their part numbers for replacing the connecting lead MTF to transition resistor:
Match the following materials with their part numbers for replacing the connecting lead MTF to transition resistor:
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What is the tightening torque for the bolt connection at the transition resistor?
What is the tightening torque for the bolt connection at the transition resistor?
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From 1 February, 2023 onward, the bolt connection at the spacer pin is performed using a coated bolt.
From 1 February, 2023 onward, the bolt connection at the spacer pin is performed using a coated bolt.
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What should be done with glue residue from former OT30 or OT80 coating in internal threads?
What should be done with glue residue from former OT30 or OT80 coating in internal threads?
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After how many operations must vacuum interrupters be replaced?
After how many operations must vacuum interrupters be replaced?
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The bolt connection at spacer pin of connecting lead MTF is changed from OT30 bolt M6 x 35 replaced with an __________ bolt M6 x 35.
The bolt connection at spacer pin of connecting lead MTF is changed from OT30 bolt M6 x 35 replaced with an __________ bolt M6 x 35.
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What size is the Hex head bolt OT30 that should not be replaced?
What size is the Hex head bolt OT30 that should not be replaced?
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The torque required for the hex head bolt C4 is 30 Nm.
The torque required for the hex head bolt C4 is 30 Nm.
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What is the part number for TS-kit mounting material VR-IEM 2010?
What is the part number for TS-kit mounting material VR-IEM 2010?
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Match the following connection elements with their corresponding torque:
Match the following connection elements with their corresponding torque:
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What tool is required for splitting a nut during the replacement process?
What tool is required for splitting a nut during the replacement process?
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The screen caps installed on the two C4 connections can be omitted during reassembly.
The screen caps installed on the two C4 connections can be omitted during reassembly.
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When must the activity be performed for diverter switch inserts?
When must the activity be performed for diverter switch inserts?
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The replacement of the connecting lead and IEM can be done independently.
The replacement of the connecting lead and IEM can be done independently.
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What are the instructions to refer to for replacing vacuum interrupters?
What are the instructions to refer to for replacing vacuum interrupters?
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The spacer pin is kept in position by an integrated ______ lock.
The spacer pin is kept in position by an integrated ______ lock.
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Using bolts and nuts with OT30 or OT80 coating requires the elements to be free of oil and grease.
Using bolts and nuts with OT30 or OT80 coating requires the elements to be free of oil and grease.
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What can happen if the bolt connection is not tightened appropriately?
What can happen if the bolt connection is not tightened appropriately?
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What is the first step when installing new vacuum interrupters?
What is the first step when installing new vacuum interrupters?
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Bolted connections with OT30 or OT80 coating must be released and re-tightened later.
Bolted connections with OT30 or OT80 coating must be released and re-tightened later.
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What must be installed to the two C4 connections that are not submerged?
What must be installed to the two C4 connections that are not submerged?
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The top edge of the selector drive shaft must be _____ than the top edge of the coupling flange.
The top edge of the selector drive shaft must be _____ than the top edge of the coupling flange.
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Which tool is required for replacing the cocking sledge of the energy accumulator?
Which tool is required for replacing the cocking sledge of the energy accumulator?
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What should be removed if the old DSI reached 300,000 operations?
What should be removed if the old DSI reached 300,000 operations?
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You can proceed with test tap-change operations without ensuring the correct dimensions.
You can proceed with test tap-change operations without ensuring the correct dimensions.
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The connections C12 must be secured with _____ after gluing.
The connections C12 must be secured with _____ after gluing.
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Study Notes
Introduction
- Emphasizes risks associated with insufficient qualifications and safety instruction neglect.
- Stresses the importance of reading and understanding operating instructions before proceeding with maintenance work.
- Highlights the need for profound knowledge and experience in maintaining on-load tap-changer types.
Spare Parts List
- Spare parts list specifically for VACUTAP® VR on-load tap-changers.
- Key components include:
- Cover gasket: 1 piece (Part no: 860258)
- Replacement set for tap change supervisory control: 1 piece (Part no: 1001026700)
- Drive shaft VR 1100NM: 1 piece (Part no: 71217401) with a predetermined breaking point.
- Various circlips and O-rings for maintenance.
Step-by-Step Maintenance
- Maintenance includes tests and condition-based parts replacement.
- Test tap-change operations require careful sequence to avoid damage:
- Ensure DSI is stable.
- Use protective gloves and handle components carefully.
- Check for correct latching conditions and operational integrity of levers and rollers.
Checking Latching Conditions
- Proper latching condition is indicated by the alignment of locking pawls and cocking slide inserts, with no gap present in the latched state.
- Unlatched states feature a marked gap, requiring attention during inspections.
Inspecting Coupling Tube
- Essential to remove the coupling tube during every inspection.
- Steps include:
- Removing bolts from the lower shielding ring and drive sleeves.
- Inspecting and cleaning the coupling tube, noting oil quality standards.
- Ensuring correct reassembly with alignment of adjustment marks.
Checking Bolt Connections
- Stringent checks on bolt connections during maintenance:
- Specific torque settings for various components:
- TTF/MTF bolts: 4.5 Nm
- TTV and MSV bolts: 5 Nm
- Specific torque settings for various components:
- Use of visual and tactile inspection for bolt connections with OT30 or OT80 glue specifications, prohibiting retightening of these.
Change Log
- Recent updates detail the introduction of VACUTAP® Condition Assessment and platform transfers, ensuring that maintenance practices are current and aligned with best practices.
Summary
- Clear understanding of DSI (Diverter Switch Insert) states is essential for maintenance.
- Performance checks of both MTF and TTF levers in specific positions indicate proper operation of the on-load tap-changer.
- Reporting irregularities in operational states or component alignments is critical for ongoing maintenance efficacy.### Retightening Bolts
- Use open-end wrenches to hold nuts during retightening: size 7 mm for TDCb/MDCb and size 8 mm for TTVb.
- Retighten TTVb bolts: top edge to 4.5 Nm and bottom edge to 5 Nm.
- Both sectors S1 and S3 require MSVa and MSVb bolts retightened to 5 Nm.
Preliminary Instructions
- Instructions for bolt connections are being updated; current guidance is preliminary.
- Checking bolt connections is mandatory during each inspection/maintenance and VACUTAP® Condition Assessment.
Replacement of Commutation Contacts
- Replacement must be performed during each inspection/maintenance and VACUTAP® Condition Assessment (de-energized).
- Ensure that bolted connections are clean and free of oil/grease, especially when using OT30 or OT80 coatings.
Transition Resistance Measurement
- Measure transition resistance using a multimeter, adhering to a ± 10% deviation from desired values.
- Procedure involves checking resistance values Ra and Rb by operating the diverter switch inserts to final end positions.
Energy Accumulator Latch Retaining Rings
- Retaining rings for energy accumulator latch require replacement based on specific criteria, particularly for units delivered before July 6, 2022.
- Correct installation is crucial; retainers must open only to a maximum inner diameter of 15.1 mm.
Parts Replacement Intervals
- The cocking sledge of the energy accumulator must be replaced after 250,000 to 350,000 operations for units produced up to October 31, 2011.
- Required materials must be provisioned via SETERSATZ by the responsible OPS before beginning work.
Change Logs
- Recent updates include the addition of replacement criteria and materials due to the introduction of VACUTAP® Condition Assessment.
- Instruction documents have undergone several updates since initial publication for clarity and precision.### Replacement Procedures
- Replacement of the connecting lead between resistor pack and MTF or MDC is required for diverter switch inserts produced up to 17 August 2020.
- This replacement must be done during the next Interrupter Exchange Module (IEM) replacement, irrespective of the reason for IEM replacement.
Safety Alerts
- Incorrect bolt connections during lead replacement can lead to malfunctions.
- Spacer pin must not loosen during connection; if it rotates, it impacts the ability to tighten bolt connections appropriately.
Installation Guidelines
- Connecting lead should be kink-free and tension-free during installation to minimize mechanical stress.
- Bolt connections should be executed with the correct tightening torque and should not be re-tightened afterward.
Changes to Materials
- As of 1 February 2023, the bolt connection at the spacer pin switched from using OT30 bolts to uncoated bolts with smaller locking washers.
- Old materials can still be used if new sets are not available, but are preferable to replace with updated materials.
Installation Steps
- Remove the diverter switch before accessing the connecting lead; bolt connections should be removed following specific guidelines.
- New connecting lead must align at a 45° angle when installed to ensure proper connection.
- Detailed installation order involves connecting lead fitting to various components, observing correct angles and alignments.
Torque Specifications
- Tightening torque for connections at the transition resistor is specified as 5 Nm.
Tools Required
- TS-KIT CONTACT LEAD MTF-RES for various sectors is needed for replacement, along with specialized tools such as nut splitters and mixing pistols for adhesives.
Regular Maintenance
- Vacuum interrupters and supporting structure must be replaced after 600,000 operations, with specific guidelines for timing (between 580,000 and 620,000 operations).
- A complete list of materials for the vacuum interrupters replacement is provided, ensuring operators have everything needed for the job.
Precautionary Measures
- When using bolts with coatings, ensure clutter-free surfaces to avoid damage during installation.
- Regular inspections and removal of old adhesive residues from bolt threads to maintain safety and operational reliability.
Introduction
- Emphasizes risks associated with insufficient qualifications and safety instruction neglect.
- Stresses the importance of reading and understanding operating instructions before proceeding with maintenance work.
- Highlights the need for profound knowledge and experience in maintaining on-load tap-changer types.
Spare Parts List
- Spare parts list specifically for VACUTAP® VR on-load tap-changers.
- Key components include:
- Cover gasket: 1 piece (Part no: 860258)
- Replacement set for tap change supervisory control: 1 piece (Part no: 1001026700)
- Drive shaft VR 1100NM: 1 piece (Part no: 71217401) with a predetermined breaking point.
- Various circlips and O-rings for maintenance.
Step-by-Step Maintenance
- Maintenance includes tests and condition-based parts replacement.
- Test tap-change operations require careful sequence to avoid damage:
- Ensure DSI is stable.
- Use protective gloves and handle components carefully.
- Check for correct latching conditions and operational integrity of levers and rollers.
Checking Latching Conditions
- Proper latching condition is indicated by the alignment of locking pawls and cocking slide inserts, with no gap present in the latched state.
- Unlatched states feature a marked gap, requiring attention during inspections.
Inspecting Coupling Tube
- Essential to remove the coupling tube during every inspection.
- Steps include:
- Removing bolts from the lower shielding ring and drive sleeves.
- Inspecting and cleaning the coupling tube, noting oil quality standards.
- Ensuring correct reassembly with alignment of adjustment marks.
Checking Bolt Connections
- Stringent checks on bolt connections during maintenance:
- Specific torque settings for various components:
- TTF/MTF bolts: 4.5 Nm
- TTV and MSV bolts: 5 Nm
- Specific torque settings for various components:
- Use of visual and tactile inspection for bolt connections with OT30 or OT80 glue specifications, prohibiting retightening of these.
Change Log
- Recent updates detail the introduction of VACUTAP® Condition Assessment and platform transfers, ensuring that maintenance practices are current and aligned with best practices.
Summary
- Clear understanding of DSI (Diverter Switch Insert) states is essential for maintenance.
- Performance checks of both MTF and TTF levers in specific positions indicate proper operation of the on-load tap-changer.
- Reporting irregularities in operational states or component alignments is critical for ongoing maintenance efficacy.### Retightening Bolts
- Use open-end wrenches to hold nuts during retightening: size 7 mm for TDCb/MDCb and size 8 mm for TTVb.
- Retighten TTVb bolts: top edge to 4.5 Nm and bottom edge to 5 Nm.
- Both sectors S1 and S3 require MSVa and MSVb bolts retightened to 5 Nm.
Preliminary Instructions
- Instructions for bolt connections are being updated; current guidance is preliminary.
- Checking bolt connections is mandatory during each inspection/maintenance and VACUTAP® Condition Assessment.
Replacement of Commutation Contacts
- Replacement must be performed during each inspection/maintenance and VACUTAP® Condition Assessment (de-energized).
- Ensure that bolted connections are clean and free of oil/grease, especially when using OT30 or OT80 coatings.
Transition Resistance Measurement
- Measure transition resistance using a multimeter, adhering to a ± 10% deviation from desired values.
- Procedure involves checking resistance values Ra and Rb by operating the diverter switch inserts to final end positions.
Energy Accumulator Latch Retaining Rings
- Retaining rings for energy accumulator latch require replacement based on specific criteria, particularly for units delivered before July 6, 2022.
- Correct installation is crucial; retainers must open only to a maximum inner diameter of 15.1 mm.
Parts Replacement Intervals
- The cocking sledge of the energy accumulator must be replaced after 250,000 to 350,000 operations for units produced up to October 31, 2011.
- Required materials must be provisioned via SETERSATZ by the responsible OPS before beginning work.
Change Logs
- Recent updates include the addition of replacement criteria and materials due to the introduction of VACUTAP® Condition Assessment.
- Instruction documents have undergone several updates since initial publication for clarity and precision.### Replacement Procedures
- Replacement of the connecting lead between resistor pack and MTF or MDC is required for diverter switch inserts produced up to 17 August 2020.
- This replacement must be done during the next Interrupter Exchange Module (IEM) replacement, irrespective of the reason for IEM replacement.
Safety Alerts
- Incorrect bolt connections during lead replacement can lead to malfunctions.
- Spacer pin must not loosen during connection; if it rotates, it impacts the ability to tighten bolt connections appropriately.
Installation Guidelines
- Connecting lead should be kink-free and tension-free during installation to minimize mechanical stress.
- Bolt connections should be executed with the correct tightening torque and should not be re-tightened afterward.
Changes to Materials
- As of 1 February 2023, the bolt connection at the spacer pin switched from using OT30 bolts to uncoated bolts with smaller locking washers.
- Old materials can still be used if new sets are not available, but are preferable to replace with updated materials.
Installation Steps
- Remove the diverter switch before accessing the connecting lead; bolt connections should be removed following specific guidelines.
- New connecting lead must align at a 45° angle when installed to ensure proper connection.
- Detailed installation order involves connecting lead fitting to various components, observing correct angles and alignments.
Torque Specifications
- Tightening torque for connections at the transition resistor is specified as 5 Nm.
Tools Required
- TS-KIT CONTACT LEAD MTF-RES for various sectors is needed for replacement, along with specialized tools such as nut splitters and mixing pistols for adhesives.
Regular Maintenance
- Vacuum interrupters and supporting structure must be replaced after 600,000 operations, with specific guidelines for timing (between 580,000 and 620,000 operations).
- A complete list of materials for the vacuum interrupters replacement is provided, ensuring operators have everything needed for the job.
Precautionary Measures
- When using bolts with coatings, ensure clutter-free surfaces to avoid damage during installation.
- Regular inspections and removal of old adhesive residues from bolt threads to maintain safety and operational reliability.
Introduction
- Emphasizes risks associated with insufficient qualifications and safety instruction neglect.
- Stresses the importance of reading and understanding operating instructions before proceeding with maintenance work.
- Highlights the need for profound knowledge and experience in maintaining on-load tap-changer types.
Spare Parts List
- Spare parts list specifically for VACUTAP® VR on-load tap-changers.
- Key components include:
- Cover gasket: 1 piece (Part no: 860258)
- Replacement set for tap change supervisory control: 1 piece (Part no: 1001026700)
- Drive shaft VR 1100NM: 1 piece (Part no: 71217401) with a predetermined breaking point.
- Various circlips and O-rings for maintenance.
Step-by-Step Maintenance
- Maintenance includes tests and condition-based parts replacement.
- Test tap-change operations require careful sequence to avoid damage:
- Ensure DSI is stable.
- Use protective gloves and handle components carefully.
- Check for correct latching conditions and operational integrity of levers and rollers.
Checking Latching Conditions
- Proper latching condition is indicated by the alignment of locking pawls and cocking slide inserts, with no gap present in the latched state.
- Unlatched states feature a marked gap, requiring attention during inspections.
Inspecting Coupling Tube
- Essential to remove the coupling tube during every inspection.
- Steps include:
- Removing bolts from the lower shielding ring and drive sleeves.
- Inspecting and cleaning the coupling tube, noting oil quality standards.
- Ensuring correct reassembly with alignment of adjustment marks.
Checking Bolt Connections
- Stringent checks on bolt connections during maintenance:
- Specific torque settings for various components:
- TTF/MTF bolts: 4.5 Nm
- TTV and MSV bolts: 5 Nm
- Specific torque settings for various components:
- Use of visual and tactile inspection for bolt connections with OT30 or OT80 glue specifications, prohibiting retightening of these.
Change Log
- Recent updates detail the introduction of VACUTAP® Condition Assessment and platform transfers, ensuring that maintenance practices are current and aligned with best practices.
Summary
- Clear understanding of DSI (Diverter Switch Insert) states is essential for maintenance.
- Performance checks of both MTF and TTF levers in specific positions indicate proper operation of the on-load tap-changer.
- Reporting irregularities in operational states or component alignments is critical for ongoing maintenance efficacy.### Retightening Bolts
- Use open-end wrenches to hold nuts during retightening: size 7 mm for TDCb/MDCb and size 8 mm for TTVb.
- Retighten TTVb bolts: top edge to 4.5 Nm and bottom edge to 5 Nm.
- Both sectors S1 and S3 require MSVa and MSVb bolts retightened to 5 Nm.
Preliminary Instructions
- Instructions for bolt connections are being updated; current guidance is preliminary.
- Checking bolt connections is mandatory during each inspection/maintenance and VACUTAP® Condition Assessment.
Replacement of Commutation Contacts
- Replacement must be performed during each inspection/maintenance and VACUTAP® Condition Assessment (de-energized).
- Ensure that bolted connections are clean and free of oil/grease, especially when using OT30 or OT80 coatings.
Transition Resistance Measurement
- Measure transition resistance using a multimeter, adhering to a ± 10% deviation from desired values.
- Procedure involves checking resistance values Ra and Rb by operating the diverter switch inserts to final end positions.
Energy Accumulator Latch Retaining Rings
- Retaining rings for energy accumulator latch require replacement based on specific criteria, particularly for units delivered before July 6, 2022.
- Correct installation is crucial; retainers must open only to a maximum inner diameter of 15.1 mm.
Parts Replacement Intervals
- The cocking sledge of the energy accumulator must be replaced after 250,000 to 350,000 operations for units produced up to October 31, 2011.
- Required materials must be provisioned via SETERSATZ by the responsible OPS before beginning work.
Change Logs
- Recent updates include the addition of replacement criteria and materials due to the introduction of VACUTAP® Condition Assessment.
- Instruction documents have undergone several updates since initial publication for clarity and precision.### Replacement Procedures
- Replacement of the connecting lead between resistor pack and MTF or MDC is required for diverter switch inserts produced up to 17 August 2020.
- This replacement must be done during the next Interrupter Exchange Module (IEM) replacement, irrespective of the reason for IEM replacement.
Safety Alerts
- Incorrect bolt connections during lead replacement can lead to malfunctions.
- Spacer pin must not loosen during connection; if it rotates, it impacts the ability to tighten bolt connections appropriately.
Installation Guidelines
- Connecting lead should be kink-free and tension-free during installation to minimize mechanical stress.
- Bolt connections should be executed with the correct tightening torque and should not be re-tightened afterward.
Changes to Materials
- As of 1 February 2023, the bolt connection at the spacer pin switched from using OT30 bolts to uncoated bolts with smaller locking washers.
- Old materials can still be used if new sets are not available, but are preferable to replace with updated materials.
Installation Steps
- Remove the diverter switch before accessing the connecting lead; bolt connections should be removed following specific guidelines.
- New connecting lead must align at a 45° angle when installed to ensure proper connection.
- Detailed installation order involves connecting lead fitting to various components, observing correct angles and alignments.
Torque Specifications
- Tightening torque for connections at the transition resistor is specified as 5 Nm.
Tools Required
- TS-KIT CONTACT LEAD MTF-RES for various sectors is needed for replacement, along with specialized tools such as nut splitters and mixing pistols for adhesives.
Regular Maintenance
- Vacuum interrupters and supporting structure must be replaced after 600,000 operations, with specific guidelines for timing (between 580,000 and 620,000 operations).
- A complete list of materials for the vacuum interrupters replacement is provided, ensuring operators have everything needed for the job.
Precautionary Measures
- When using bolts with coatings, ensure clutter-free surfaces to avoid damage during installation.
- Regular inspections and removal of old adhesive residues from bolt threads to maintain safety and operational reliability.
Introduction
- Emphasizes risks associated with insufficient qualifications and safety instruction neglect.
- Stresses the importance of reading and understanding operating instructions before proceeding with maintenance work.
- Highlights the need for profound knowledge and experience in maintaining on-load tap-changer types.
Spare Parts List
- Spare parts list specifically for VACUTAP® VR on-load tap-changers.
- Key components include:
- Cover gasket: 1 piece (Part no: 860258)
- Replacement set for tap change supervisory control: 1 piece (Part no: 1001026700)
- Drive shaft VR 1100NM: 1 piece (Part no: 71217401) with a predetermined breaking point.
- Various circlips and O-rings for maintenance.
Step-by-Step Maintenance
- Maintenance includes tests and condition-based parts replacement.
- Test tap-change operations require careful sequence to avoid damage:
- Ensure DSI is stable.
- Use protective gloves and handle components carefully.
- Check for correct latching conditions and operational integrity of levers and rollers.
Checking Latching Conditions
- Proper latching condition is indicated by the alignment of locking pawls and cocking slide inserts, with no gap present in the latched state.
- Unlatched states feature a marked gap, requiring attention during inspections.
Inspecting Coupling Tube
- Essential to remove the coupling tube during every inspection.
- Steps include:
- Removing bolts from the lower shielding ring and drive sleeves.
- Inspecting and cleaning the coupling tube, noting oil quality standards.
- Ensuring correct reassembly with alignment of adjustment marks.
Checking Bolt Connections
- Stringent checks on bolt connections during maintenance:
- Specific torque settings for various components:
- TTF/MTF bolts: 4.5 Nm
- TTV and MSV bolts: 5 Nm
- Specific torque settings for various components:
- Use of visual and tactile inspection for bolt connections with OT30 or OT80 glue specifications, prohibiting retightening of these.
Change Log
- Recent updates detail the introduction of VACUTAP® Condition Assessment and platform transfers, ensuring that maintenance practices are current and aligned with best practices.
Summary
- Clear understanding of DSI (Diverter Switch Insert) states is essential for maintenance.
- Performance checks of both MTF and TTF levers in specific positions indicate proper operation of the on-load tap-changer.
- Reporting irregularities in operational states or component alignments is critical for ongoing maintenance efficacy.### Retightening Bolts
- Use open-end wrenches to hold nuts during retightening: size 7 mm for TDCb/MDCb and size 8 mm for TTVb.
- Retighten TTVb bolts: top edge to 4.5 Nm and bottom edge to 5 Nm.
- Both sectors S1 and S3 require MSVa and MSVb bolts retightened to 5 Nm.
Preliminary Instructions
- Instructions for bolt connections are being updated; current guidance is preliminary.
- Checking bolt connections is mandatory during each inspection/maintenance and VACUTAP® Condition Assessment.
Replacement of Commutation Contacts
- Replacement must be performed during each inspection/maintenance and VACUTAP® Condition Assessment (de-energized).
- Ensure that bolted connections are clean and free of oil/grease, especially when using OT30 or OT80 coatings.
Transition Resistance Measurement
- Measure transition resistance using a multimeter, adhering to a ± 10% deviation from desired values.
- Procedure involves checking resistance values Ra and Rb by operating the diverter switch inserts to final end positions.
Energy Accumulator Latch Retaining Rings
- Retaining rings for energy accumulator latch require replacement based on specific criteria, particularly for units delivered before July 6, 2022.
- Correct installation is crucial; retainers must open only to a maximum inner diameter of 15.1 mm.
Parts Replacement Intervals
- The cocking sledge of the energy accumulator must be replaced after 250,000 to 350,000 operations for units produced up to October 31, 2011.
- Required materials must be provisioned via SETERSATZ by the responsible OPS before beginning work.
Change Logs
- Recent updates include the addition of replacement criteria and materials due to the introduction of VACUTAP® Condition Assessment.
- Instruction documents have undergone several updates since initial publication for clarity and precision.### Replacement Procedures
- Replacement of the connecting lead between resistor pack and MTF or MDC is required for diverter switch inserts produced up to 17 August 2020.
- This replacement must be done during the next Interrupter Exchange Module (IEM) replacement, irrespective of the reason for IEM replacement.
Safety Alerts
- Incorrect bolt connections during lead replacement can lead to malfunctions.
- Spacer pin must not loosen during connection; if it rotates, it impacts the ability to tighten bolt connections appropriately.
Installation Guidelines
- Connecting lead should be kink-free and tension-free during installation to minimize mechanical stress.
- Bolt connections should be executed with the correct tightening torque and should not be re-tightened afterward.
Changes to Materials
- As of 1 February 2023, the bolt connection at the spacer pin switched from using OT30 bolts to uncoated bolts with smaller locking washers.
- Old materials can still be used if new sets are not available, but are preferable to replace with updated materials.
Installation Steps
- Remove the diverter switch before accessing the connecting lead; bolt connections should be removed following specific guidelines.
- New connecting lead must align at a 45° angle when installed to ensure proper connection.
- Detailed installation order involves connecting lead fitting to various components, observing correct angles and alignments.
Torque Specifications
- Tightening torque for connections at the transition resistor is specified as 5 Nm.
Tools Required
- TS-KIT CONTACT LEAD MTF-RES for various sectors is needed for replacement, along with specialized tools such as nut splitters and mixing pistols for adhesives.
Regular Maintenance
- Vacuum interrupters and supporting structure must be replaced after 600,000 operations, with specific guidelines for timing (between 580,000 and 620,000 operations).
- A complete list of materials for the vacuum interrupters replacement is provided, ensuring operators have everything needed for the job.
Precautionary Measures
- When using bolts with coatings, ensure clutter-free surfaces to avoid damage during installation.
- Regular inspections and removal of old adhesive residues from bolt threads to maintain safety and operational reliability.
Introduction
- Emphasizes risks associated with insufficient qualifications and safety instruction neglect.
- Stresses the importance of reading and understanding operating instructions before proceeding with maintenance work.
- Highlights the need for profound knowledge and experience in maintaining on-load tap-changer types.
Spare Parts List
- Spare parts list specifically for VACUTAP® VR on-load tap-changers.
- Key components include:
- Cover gasket: 1 piece (Part no: 860258)
- Replacement set for tap change supervisory control: 1 piece (Part no: 1001026700)
- Drive shaft VR 1100NM: 1 piece (Part no: 71217401) with a predetermined breaking point.
- Various circlips and O-rings for maintenance.
Step-by-Step Maintenance
- Maintenance includes tests and condition-based parts replacement.
- Test tap-change operations require careful sequence to avoid damage:
- Ensure DSI is stable.
- Use protective gloves and handle components carefully.
- Check for correct latching conditions and operational integrity of levers and rollers.
Checking Latching Conditions
- Proper latching condition is indicated by the alignment of locking pawls and cocking slide inserts, with no gap present in the latched state.
- Unlatched states feature a marked gap, requiring attention during inspections.
Inspecting Coupling Tube
- Essential to remove the coupling tube during every inspection.
- Steps include:
- Removing bolts from the lower shielding ring and drive sleeves.
- Inspecting and cleaning the coupling tube, noting oil quality standards.
- Ensuring correct reassembly with alignment of adjustment marks.
Checking Bolt Connections
- Stringent checks on bolt connections during maintenance:
- Specific torque settings for various components:
- TTF/MTF bolts: 4.5 Nm
- TTV and MSV bolts: 5 Nm
- Specific torque settings for various components:
- Use of visual and tactile inspection for bolt connections with OT30 or OT80 glue specifications, prohibiting retightening of these.
Change Log
- Recent updates detail the introduction of VACUTAP® Condition Assessment and platform transfers, ensuring that maintenance practices are current and aligned with best practices.
Summary
- Clear understanding of DSI (Diverter Switch Insert) states is essential for maintenance.
- Performance checks of both MTF and TTF levers in specific positions indicate proper operation of the on-load tap-changer.
- Reporting irregularities in operational states or component alignments is critical for ongoing maintenance efficacy.### Retightening Bolts
- Use open-end wrenches to hold nuts during retightening: size 7 mm for TDCb/MDCb and size 8 mm for TTVb.
- Retighten TTVb bolts: top edge to 4.5 Nm and bottom edge to 5 Nm.
- Both sectors S1 and S3 require MSVa and MSVb bolts retightened to 5 Nm.
Preliminary Instructions
- Instructions for bolt connections are being updated; current guidance is preliminary.
- Checking bolt connections is mandatory during each inspection/maintenance and VACUTAP® Condition Assessment.
Replacement of Commutation Contacts
- Replacement must be performed during each inspection/maintenance and VACUTAP® Condition Assessment (de-energized).
- Ensure that bolted connections are clean and free of oil/grease, especially when using OT30 or OT80 coatings.
Transition Resistance Measurement
- Measure transition resistance using a multimeter, adhering to a ± 10% deviation from desired values.
- Procedure involves checking resistance values Ra and Rb by operating the diverter switch inserts to final end positions.
Energy Accumulator Latch Retaining Rings
- Retaining rings for energy accumulator latch require replacement based on specific criteria, particularly for units delivered before July 6, 2022.
- Correct installation is crucial; retainers must open only to a maximum inner diameter of 15.1 mm.
Parts Replacement Intervals
- The cocking sledge of the energy accumulator must be replaced after 250,000 to 350,000 operations for units produced up to October 31, 2011.
- Required materials must be provisioned via SETERSATZ by the responsible OPS before beginning work.
Change Logs
- Recent updates include the addition of replacement criteria and materials due to the introduction of VACUTAP® Condition Assessment.
- Instruction documents have undergone several updates since initial publication for clarity and precision.### Replacement Procedures
- Replacement of the connecting lead between resistor pack and MTF or MDC is required for diverter switch inserts produced up to 17 August 2020.
- This replacement must be done during the next Interrupter Exchange Module (IEM) replacement, irrespective of the reason for IEM replacement.
Safety Alerts
- Incorrect bolt connections during lead replacement can lead to malfunctions.
- Spacer pin must not loosen during connection; if it rotates, it impacts the ability to tighten bolt connections appropriately.
Installation Guidelines
- Connecting lead should be kink-free and tension-free during installation to minimize mechanical stress.
- Bolt connections should be executed with the correct tightening torque and should not be re-tightened afterward.
Changes to Materials
- As of 1 February 2023, the bolt connection at the spacer pin switched from using OT30 bolts to uncoated bolts with smaller locking washers.
- Old materials can still be used if new sets are not available, but are preferable to replace with updated materials.
Installation Steps
- Remove the diverter switch before accessing the connecting lead; bolt connections should be removed following specific guidelines.
- New connecting lead must align at a 45° angle when installed to ensure proper connection.
- Detailed installation order involves connecting lead fitting to various components, observing correct angles and alignments.
Torque Specifications
- Tightening torque for connections at the transition resistor is specified as 5 Nm.
Tools Required
- TS-KIT CONTACT LEAD MTF-RES for various sectors is needed for replacement, along with specialized tools such as nut splitters and mixing pistols for adhesives.
Regular Maintenance
- Vacuum interrupters and supporting structure must be replaced after 600,000 operations, with specific guidelines for timing (between 580,000 and 620,000 operations).
- A complete list of materials for the vacuum interrupters replacement is provided, ensuring operators have everything needed for the job.
Precautionary Measures
- When using bolts with coatings, ensure clutter-free surfaces to avoid damage during installation.
- Regular inspections and removal of old adhesive residues from bolt threads to maintain safety and operational reliability.
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This quiz covers the introductory concepts of safety and risk management, emphasizing the importance of following safety instructions to prevent personal injury and property damage. It highlights potential hazards and the necessity of qualified personnel in the operation of machinery or equipment.