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VACUTAP VR 2010_CDS
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VACUTAP VR 2010_CDS

Created by
@ValuableSugilite

Questions and Answers

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?

860258

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?

<p>Inform maintenance team</p> Signup and view all the answers

The energy accumulator must be checked during each maintenance and each VACUTAP® _____ assessment.

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

What is the torque setting for retightening bolts on TTF/MTF?

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

What color is the adjustment mark used for aligning the coupling tube?

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

What tool is used to place the retaining ring?

<p>Retaining ring pliers A11</p> Signup and view all the answers

The replacement of the connecting lead must be performed once for diverter switch inserts with production finish date up to __________.

<p>17 August, 2020</p> Signup and view all the answers

Fitting washers are not installed under the retaining ring.

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

What is the maximum number of operations after which the cocking sledge of the energy accumulator should be replaced?

<p>350,000 operations</p> Signup and view all the answers

The tightening torque for the bolt connection at the transition resistor is _______ Nm.

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

Which material is required for replacing the cocking sledge of the energy accumulator? (Select all that apply)

<p>Cocking sledge KIT 3/2 sect.</p> Signup and view all the answers

What type of connection must the replacement of the connecting lead between resistor pack and MTF always be combined with?

<p>IEM (Interrupter exchange module)</p> Signup and view all the answers

The old bolt connection at the spacer pin can continue to be used after 1 February, 2023.

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

What should be removed from all connection surfaces before installing bolted connections with OT30 or OT80 coating?

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

What is the torque specification for retightening bolts in sector S1 on TDCb/MDCb?

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

What should be done to check the tight seat of glue bolts?

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

What tool is used to hold the nut while retightening bolts?

<p>Open-end wrench</p> Signup and view all the answers

What is the maximum permitted deviation from the desired transition resistance value?

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

Match the following components with their torque specifications:

<p>TDCb/MDCb = 4.5 Nm TTVb top edge = 4.5 Nm TTVb bottom edge = 5 Nm MSVa and MSVb = 5 Nm</p> Signup and view all the answers

What is the correct torque for tightening new bolts?

<p>5.5 Nm</p> Signup and view all the answers

What type of bolt coating is used for the connection?

<p>OT80</p> Signup and view all the answers

It is permitted to retighten glue bolts after installation.

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

What must be done to bolts and nuts with OT30 or OT80 coating before installation?

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

During each inspection, what must be checked with the diverter switch inserts?

<p>Transition resistance values</p> Signup and view all the answers

What must be removed from the new IEM before installation?

<p>Transport protection</p> Signup and view all the answers

Bolted connections with OT30 or OT80 coating can be installed with oil and grease present.

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

What must be secured with DELO-DUOPOX AD895?

<p>C12 connections</p> Signup and view all the answers

The top edge of the selector drive shaft must be _____ higher than the top edge of the coupling flange.

<p>0.1-0.4 mm</p> Signup and view all the answers

When should the cocking sledge of the energy accumulator be replaced?

<p>After 250,000 operations at the earliest, or after 350,000 operations at the latest.</p> Signup and view all the answers

Which tool is listed for replacing the cocking sledge of the energy accumulator?

<p>MH-'Toolkit VM + VR TS'</p> Signup and view all the answers

What should be done if the check sizes are not within the required values?

<p>Other rollers can be inserted at C3 to achieve the predefined values.</p> Signup and view all the answers

Red marks on the energy accumulator holder and coupling shaft must match at all stages of installation.

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

The activity must be performed once for diverter switch inserts with production finish date up to 17 August, 2020.

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

What must be performed during the next replacement of the IEM?

<p>Replacement of both connecting leads</p> Signup and view all the answers

What danger is mentioned regarding incorrectly performed bolt connection?

<p>Risk of malfunction</p> Signup and view all the answers

The spacer pin is kept in position by an integrated ______ lock on its base.

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

The replacement of the connecting lead can be performed independently of the IEM replacement.

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

When using bolts and nuts with OT30 or OT80 coating, what should be ensured?

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

What must be removed from connection surfaces before bolting?

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

When should vacuum interrupters be replaced?

<p>After every 580,000 to 620,000 operations</p> Signup and view all the answers

What is the purpose of removing glue residue from internal threads?

<p>To ensure proper recutting of the internal thread.</p> Signup and view all the answers

What must be used for the modification of vacuum interrupters?

<p>Replacement kit</p> Signup and view all the answers

What should be done if a tap-change supervisory control is installed?

<p>Move the diverter switch insert to the final end position</p> Signup and view all the answers

Each element of the bolt connections should be replaced with a new one.

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

What torque is specified for the hex head bolt of type C1?

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

Materials for modifications will be provided by the _____.

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

Which tool is used for removing vacuum interrupters?

<p>Nut splitter</p> Signup and view all the answers

What type of bolt connection is referred to as C4?

<p>Hex head bolt OT80</p> Signup and view all the answers

What documentation number is associated with the glue used?

<p>704291:xx</p> Signup and view all the answers

There is a risk of personal damage or injury if maintenance work is performed by qualified personnel.

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

Which of the following items is part of the spare parts list for the VACUTAP® VR?

<p>Cover Gasket</p> Signup and view all the answers

During each maintenance, the latching condition of the diverter switch inserts type VACUTAP® VR® model _____ must be checked.

<p>2010</p> Signup and view all the answers

What should you wear when grabbing the upper shielding ring of the coupling shaft?

<p>Protective gloves</p> Signup and view all the answers

What must be checked for damage on the on-load tap-changer during test tap-change operations?

<p>Actuating cams for vacuum interrupters</p> Signup and view all the answers

What are the two defined positions that TTF and MTF levers must have?

<p>V shape</p> Signup and view all the answers

When refitting the coupling tube, ensure alignment of the _____ adjustment mark.

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

The bolt connections must be checked during each inspection and each VACUTAP® Condition Assessment when energized.

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

How should bolts on TTF/MTF be retightened?

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

What must be checked during each inspection/maintenance of diverter switch inserts type VACUTAP® VR® model 2010?

<p>Bolt connections and transition resistance values</p> Signup and view all the answers

The retightening torque for bolts on TDCb/MDCb is _____ Nm.

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

The retightening torque for bolts on TTVa is _____ Nm.

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

It is permitted to retighten glue bolts with OT30 or OT80 coating.

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

What should be checked visually and tactilely in relation to bolt connections?

<p>Tight seat of bolt connections</p> Signup and view all the answers

Which of the following is a requirement when using bolts and nuts with OT coating?

<p>Elements must be free of oil and grease</p> Signup and view all the answers

The installation of retaining rings during maintenance must not exceed an inner diameter of _____ mm.

<p>15.1</p> Signup and view all the answers

What type of pliers should be used for removing retaining rings?

<p>Angled retaining ring pliers A11</p> Signup and view all the answers

The activity must be performed once for diverter switch inserts with production finish date after 17 August, 2020.

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

Which replacements must be performed during the next replacement of the IEM?

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

What must be ensured when using bolts and nuts with OT30 or OT80 coating?

<p>The bolted connection elements must be free of oil and grease.</p> Signup and view all the answers

Loosening the bolt of the bolt connection does not affect the spacer pin.

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

Live connections performed incorrectly can damage the ______.

<p>on-load tap-changer</p> Signup and view all the answers

The first step in replacing the cocking sledge of the energy accumulator is to remove the _____ from the resistor pack.

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

What should be ensured when installing the new retaining ring?

<p>Engaging in the corresponding groove in a form-locking manner.</p> Signup and view all the answers

The replacement of the connecting lead can be performed independently from the IEM replacement.

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

What is the maximum number of operations after which the cocking sledge of the energy accumulator must be replaced?

<p>350,000 operations</p> Signup and view all the answers

Match the following material descriptions with their corresponding part numbers for the replacement of connecting lead MTF to transition resistor:

<p>TS-KIT CONTACT LEAD MTF-RES UG2V7 - 1SECT = 1017005101 TS-KIT CONTACT LEAD MTF-RES UG2V4 - 2SECT = 1017005201 TS-KIT CONTACT LEAD MTF-RES UG2V4 - 3SECT = 1017005301</p> Signup and view all the answers

What must be installed before lifting the IEM?

<p>Three lifting eye bolts</p> Signup and view all the answers

What is the specified tightening torque for the bolt connection at the transition resistor?

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

All red parts of the new IEM must be removed before installation.

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

Which of these tasks must be performed when replacing the connecting lead between resistor pack and MTF?

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

What should be ensured when using bolts and nuts with OT30 or OT80 coating?

<p>They must be clean and free of oil and grease.</p> Signup and view all the answers

What must be secured with DELO-DUOPOX AD895?

<p>C12 connections</p> Signup and view all the answers

After gluing the C12 bolt connection, wait _____ hours before filling the diverter switch oil compartment.

<p>3</p> Signup and view all the answers

When replacing the cocking sledge for diverter switch inserts, which date must be taken into account?

<p>Before 31 October 2011</p> Signup and view all the answers

What must the upper edge of the selector drive shaft be compared to the coupling flange?

<p>0.1-0.4 mm higher</p> Signup and view all the answers

The two rollers can be combined randomly when adjusting dimensions.

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

What is the general rule for replacing vacuum interrupters?

<p>Replacement must be performed after every 600,000 operations.</p> Signup and view all the answers

At what point can the vacuum interrupters be replaced at the earliest?

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

Which material is included in the replacement kit for vacuum interrupters?

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

You should replace all elements of the bolt connections with new ones.

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

What is the torque specification for a Hex.head bolt M8?

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

Match the following element types with their specifications:

<p>Hex.head bolt OT30 = M6 x 35, 6.5 Nm Flat head screw with torx OT30 = M5 x 12, 4.5 Nm Plastic hex.head bolt = M8 x 60, 2 Nm Thread stud OT30 = M10, 23 Nm</p> Signup and view all the answers

What item is used to secure connections during assembly?

<p>Glue DELO-DUOPOX AD895</p> Signup and view all the answers

What is the torque for retightening bolts on TDCb/MDCb?

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

What tools are used to tighten bolts on TTVb top edge?

<p>Open-end wrench size 8 mm</p> Signup and view all the answers

It is permitted to retighten glue bolts with OT30 or OT80 coating.

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

What must be visually inspected during the bolt connection check?

<p>Tight seat of bolt connections</p> Signup and view all the answers

What is the tightening torque for bolts in sectors S1 and S3?

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

What must always be ensured when using bolts and nuts with OT30 or OT80 coating?

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

What is the maximum inner diameter that retaining rings should not exceed during installation?

<p>15.1 mm</p> Signup and view all the answers

How many Allen bolts OT30-8 are required for a 1-sector diverter switch insert?

<p>2</p> Signup and view all the answers

What measures must be performed during each inspection/maintenance and each VACUTAP® Condition Assessment?

<p>Measure transition resistance values</p> Signup and view all the answers

The activity must be performed for diverter switch inserts with production finish date up to 17 August, 2020.

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

When must the replacement of the connecting lead between resistor pack and MTF or MDC be performed?

<p>During the next replacement of the IEM.</p> Signup and view all the answers

The spacer pin is kept in position by an integrated rotation lock on its base.

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

What can happen if the bolt connection is incorrectly performed during the replacement of the connecting lead?

<p>Malfunction due to inappropriately performed connection</p> Signup and view all the answers

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

How often must the vacuum interrupters be replaced?

<p>Every 600,000 operations</p> Signup and view all the answers

What must be done after 580,000 operations?

<p>Replacement of vacuum interrupters can be performed.</p> Signup and view all the answers

The instructions specify to replace every element of the bolt connections with a new one.

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

Which part is not to be replaced according to the connection elements instructions?

<p>C9</p> Signup and view all the answers

What is the torque spec for C4 bolt connections?

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

Which tool is used to split nuts during removal?

<p>Nut splitter</p> Signup and view all the answers

What should be checked before proceeding with the removal of the coupling shaft?

<p>Ensure diverter switch insert is in final latching position</p> Signup and view all the answers

The glue used for securing connections is _____.

<p>DELO-DUOPOX AD895</p> Signup and view all the answers

How many lifting eye bolts are required in the tools?

<p>3</p> Signup and view all the answers

If work is performed by insufficiently qualified personnel, there is a risk of personal damage or injury.

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

Which components must be removed before performing work on the diverter switch insert?

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

What type of maintenance requires profound knowledge and experience from personnel?

<p>Maintenance of the relevant on-load tap-changer type</p> Signup and view all the answers

The drive shaft is labeled as VR ____ NM.

<p>1100</p> Signup and view all the answers

What should be checked during the latching condition inspection of the diverter switch insert?

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

How many bolts need to be removed to inspect the coupling tube?

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

The energy accumulator has both a locking pawl and a cocking sledge insert.

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

What is the torque specification for tightening the TTF/MTF bolts?

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

When refitting the coupling tube, ensure alignment of the red adjustment mark and the adjustment mark on the _____ switch insert.

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

What should be taken care of when removing the retaining ring?

<p>Fitting washers should not drop when removing the retaining ring.</p> Signup and view all the answers

The retaining ring pliers A11 should be placed in the same way for both sides.

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

What date signifies when replacement should be performed on the cocking sledge of the energy accumulator?

<p>31 October, 2011</p> Signup and view all the answers

What coating should be free of oil and grease before performing a bolted connection?

<p>Both OT30 and OT80</p> Signup and view all the answers

The material required for the replacement must be provided via _____ by the responsible OPS before work begins.

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

What is the new bolt type used at the spacer pin connection starting from February 1, 2023?

<p>Uncoated bolt with a smaller locking washer</p> Signup and view all the answers

What is the purpose of replacing the connecting lead between the resistor pack and MTF?

<p>To ensure kink-free and tension-free installation.</p> Signup and view all the answers

Match the following materials with their part numbers:

<p>HEX HEAD BOLT M6 x 35 OT30-8 = 74275000 Locking washer SK-M-6, 6.1X14.2 = 40179900 HEX HEAD BOLT M6 x 35 8.8 uncoated = 450064 Locking washer SK-S6, 6.1X12.2 = 70426901</p> Signup and view all the answers

The connecting lead must be installed at a 90° angle to the transition resistor.

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

What should be checked before installing new vacuum interrupters?

<p>Screwing positions overview.</p> Signup and view all the answers

Which parts must be removed from the new IEM before installation?

<p>Transport protection</p> Signup and view all the answers

The old IEM transport protection should be removed if the old IEM is sent back.

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

What coating should bolts and nuts have when connecting elements?

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

What must be done after securing the C12 connections?

<p>Wait 3 hours before filling the diverter switch oil compartment with oil.</p> Signup and view all the answers

What should be replaced one at a time after unscrewing C6 connections?

<p>The unscrewed C6 connections.</p> Signup and view all the answers

A cocking sledge must be replaced if the old DSI was delivered after October 2011.

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

The top edge of the selector drive shaft must be ____ higher than the top edge of the coupling flange.

<p>0.1-0.4 mm</p> Signup and view all the answers

How often must the replacement of the cocking sledge be performed for diverter switch inserts with a finish date up to October 31, 2011?

<p>Every 250,000 operations</p> Signup and view all the answers

What happens if the required dimensions cannot be kept while varying the number of rollers at C3?

<p>Remove 3 C13 connections and follow specific steps to re-adjust.</p> Signup and view all the answers

What is the torque setting for retightening bolts in sector S1 on TDCb/MDCb?

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

What should be used to check tight seat of bolt connections?

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

What type of coating is mentioned for glue bolts used in bolted connections?

<p>OT30 or OT80</p> Signup and view all the answers

How often should the measures for checking bolt connections be performed?

<p>During each inspection/maintenance and each VACUTAP® Condition Assessment</p> Signup and view all the answers

What is the required tightening torque for bolts on TTVb top edge?

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

Retighten bolts on TTVb bottom edge to _____ Nm.

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

It is permitted to retighten glue bolts with OT30 or OT80 coating.

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

Which tool is recommended for tightening bolts?

<p>Open-end wrench size 7 mm</p> Signup and view all the answers

Performing work without qualified personnel can lead to personal damage or equipment malfunction.

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

What should be checked regarding the actuating cams for vacuum interrupters MSV/TTV?

<p>Cams should not be broken or cracked.</p> Signup and view all the answers

What is the purpose of the drive shaft VR 1100NM?

<p>Supports the diverter switch mechanism</p> Signup and view all the answers

The energy accumulator has both a locking pawl and a _____ on the left-hand side.

<p>cocking sledge insert</p> Signup and view all the answers

What must be done prior to removing the coupling tube from the diverter switch insert?

<p>Remove the 6 bolts holding the lower shielding ring.</p> Signup and view all the answers

What must be ensured when refitting the coupling tube?

<p>Alignment of the red adjustment mark</p> Signup and view all the answers

What is the required torque for retightening bolts on TTF/MTF?

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

What does the gap between the locking pawl and the cocking slide insert indicate?

<p>The system is unlatched</p> Signup and view all the answers

The inspection of the coupling tube must be performed during each VACUTAP® Condition Assessment.

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

What should be removed alongside the cable tie when attaching the cable?

<p>Retaining ring</p> Signup and view all the answers

What is crucial to ensure while removing the retaining ring?

<p>That the fitting washers do not drop</p> Signup and view all the answers

New retaining rings should be installed in a loose manner.

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

What must be performed during maintenance on the diverter switch?

<p>Replacement of cocking sledge of energy accumulator</p> Signup and view all the answers

What is the minimum number of operations after which the cocking sledge must be replaced?

<p>250,000 operations</p> Signup and view all the answers

What is a risk when replacing the connecting lead without replacing the IEM?

<p>Malfunction due to incorrectly performed bolt connection</p> Signup and view all the answers

What angle should the connecting lead be positioned during installation?

<p>45°</p> Signup and view all the answers

The tightening torque for installing the new connecting lead at the transition resistor is _____ Nm.

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

What is no longer used in the bolt connection at the spacer pin after 1 February, 2023?

<p>OT30 bolts</p> Signup and view all the answers

What is the part number for the new hex head bolt used from 1 February, 2023?

<p>450064</p> Signup and view all the answers

What is the recommended interval for replacing vacuum interrupters?

<p>After 580,000 operations at the earliest</p> Signup and view all the answers

What materials are provided for the vacuum interrupter modification?

<p>Vacuum interrupters with supporting structure and all bolts, washers, etc.</p> Signup and view all the answers

The first publication date for the materials indicates they are reliable.

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

Replacement of vacuum interrupters is directed after every _____ operations.

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

Match the following tools with their descriptions:

<p>Nut splitter = Used for cutting nuts DELO mixing pistol = Glue applicator Lifting eye bolt = Used for lifting Ratchet box-end wrench = For loosening and tightening bolts</p> Signup and view all the answers

Which connection elements should not be replaced?

<p>Those indicated with 'do not replace'</p> Signup and view all the answers

What should be checked for the actuating cams for vacuum interrupters?

<p>They should not be broken or cracked.</p> Signup and view all the answers

The activity must be performed once for diverter switch inserts with production finish date up to 17 August, 2020.

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

What must the replacement of the connecting lead be performed in combination with?

<p>Replacement of the IEM</p> Signup and view all the answers

What can happen if the connecting lead is replaced without replacing the IEM?

<p>Danger of incorrectly performed bolt connection</p> Signup and view all the answers

The spacer pin is kept in position by an integrated ______ lock.

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

Damage to on-load tap-changer can occur if live connections are performed incorrectly.

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

What should be removed from all connection surfaces?

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

What should be done with the lifting eye bolts in the energy accumulator holder?

<p>Screw three lifting eye bolts in the connection points.</p> Signup and view all the answers

All red parts must be removed from the new IEM, indicating these parts were for ______.

<p>transport protection</p> Signup and view all the answers

Bolts and nuts with OT30 or OT80 coating can be installed if they are oily or greasy.

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

What should be done if a bolted connection must be released again?

<p>Use new bolts or nuts with intact OT coating</p> Signup and view all the answers

How long should you wait after gluing the C12 bolt connection before filling the oil compartment?

<p>3 hours</p> Signup and view all the answers

What must be replaced if the old DSI was delivered before October 2011 and has reached 300,000 operations?

<p>the cocking sledge</p> Signup and view all the answers

What should the top edge of the selector drive shaft be higher than?

<p>the top edge of the coupling flange</p> Signup and view all the answers

The selector drive shaft can be installed without ensuring the marking holes match.

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

At what operation count should the cocking sledge of the energy accumulator be replaced at the earliest?

<p>250,000 operations</p> Signup and view all the answers

The old DSI must be replaced during maintenance after ______ operations.

<p>350,000</p> Signup and view all the answers

What should you use to measure check sizes on the DSI?

<p>feeler gauge</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

Which of the following parts is used for the maintenance of the OLTC?

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

What must be checked before performing test tap-change operations?

<p>Firm and stable standing of the DSI.</p> Signup and view all the answers

The gap formed when the locking pawl is _______ is marked 'd'.

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

What should be done during each maintenance regarding the latching condition?

<p>Check the latching condition of diverter switch inserts.</p> Signup and view all the answers

How many screws hold the lower shielding ring?

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

Match the maintenance practices with their descriptions:

<p>Check latching condition = Ensure that there is no gap between the locking pawl and cocking slide insert Inspect coupling tube = Check for mechanical or electrical damage Retighten bolts = Ensure all connections are secure at specified torque Perform test tap-change operations = Verify proper operation and alignment of components</p> Signup and view all the answers

What is the torque to which bolts in sector S1 on TDCb/MDCb should be retightened?

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

What is required to check the tight seat of bolt connections?

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

Which sizes of open-end wrenches are needed to hold the nut while retightening bolts on TTVb?

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

What must be done to the vacuum interrupter before measuring transition resistance?

<p>It must be opened.</p> Signup and view all the answers

Retightening of bolts should be performed after the VACUTAP® Condition Assessment.

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

What is the maximum inner diameter to which the retaining ring should be opened during installation?

<p>15.1 mm</p> Signup and view all the answers

What is the torque for the bolt on TTVb bottom edge?

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

Which of the following materials is needed to replace the bolt connection of commutation contacts?

<p>Allen bolt OT30-8</p> Signup and view all the answers

When should the replacement of retaining rings at the energy accumulator latch be performed?

<p>During each VACUTAP® Condition Assessment (de-energized)</p> Signup and view all the answers

What tool is used to remove the retaining ring?

<p>Retaining ring pliers A11</p> Signup and view all the answers

The second retaining ring is more difficult to reach on side ______.

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

Fitting washers should be removed when removing the retaining ring.

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

When must the cocking sledge of the energy accumulator be replaced?

<p>After 250,000 operations at the earliest and after 350,000 operations at the latest</p> Signup and view all the answers

What must be performed during the next replacement of the IEM?

<p>Replace the connecting lead</p> Signup and view all the answers

The spacer pin can become loosened when loosening the bolt connection.

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

What should be ensured about the bolted connection elements when using OT30 or OT80 coating?

<p>They should be free of oil and grease</p> Signup and view all the answers

Match the following materials with their part numbers for replacing the connecting lead MTF to transition resistor:

<p>TS-KIT CONTACT LEAD MTF-RES UG2V7 - 1SECT. = 1017005101 TS-KIT CONTACT LEAD MTF-RES UG2V4 - 2SECT. = 1017005201 TS-KIT CONTACT LEAD MTF-RES UG2V4 - 3SECT. = 1017005301</p> Signup and view all the answers

What is the tightening torque for the bolt connection at the transition resistor?

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

From 1 February, 2023 onward, the bolt connection at the spacer pin is performed using a coated bolt.

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

What should be done with glue residue from former OT30 or OT80 coating in internal threads?

<p>It must be removed by recutting the internal thread.</p> Signup and view all the answers

After how many operations must vacuum interrupters be replaced?

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

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.

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

What size is the Hex head bolt OT30 that should not be replaced?

<p>M6 x 35</p> Signup and view all the answers

The torque required for the hex head bolt C4 is 30 Nm.

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

What is the part number for TS-kit mounting material VR-IEM 2010?

<p>779775:xx</p> Signup and view all the answers

Match the following connection elements with their corresponding torque:

<p>C1 = 20 Nm C2 = 20 Nm C3 = 23 Nm C4 = 20 Nm C6 = 6.5 Nm C12 = 2 Nm</p> Signup and view all the answers

What tool is required for splitting a nut during the replacement process?

<p>Nut splitter</p> Signup and view all the answers

The screen caps installed on the two C4 connections can be omitted during reassembly.

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

When must the activity be performed for diverter switch inserts?

<p>Once for production finish date up to 17 August, 2020</p> Signup and view all the answers

The replacement of the connecting lead and IEM can be done independently.

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

What are the instructions to refer to for replacing vacuum interrupters?

<p>Replacement of vacuum interrupters (600,000)</p> Signup and view all the answers

The spacer pin is kept in position by an integrated ______ lock.

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

Using bolts and nuts with OT30 or OT80 coating requires the elements to be free of oil and grease.

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

What can happen if the bolt connection is not tightened appropriately?

<p>The spacer pin may start turning and cause malfunction.</p> Signup and view all the answers

What is the first step when installing new vacuum interrupters?

<p>Unpack the new IEM and remove transport protection</p> Signup and view all the answers

Bolted connections with OT30 or OT80 coating must be released and re-tightened later.

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

What must be installed to the two C4 connections that are not submerged?

<p>Screening caps</p> Signup and view all the answers

The top edge of the selector drive shaft must be _____ than the top edge of the coupling flange.

<p>0.1-0.4 mm higher</p> Signup and view all the answers

Which tool is required for replacing the cocking sledge of the energy accumulator?

<p>MH-'Toolkit VM + VR TS'</p> Signup and view all the answers

What should be removed if the old DSI reached 300,000 operations?

<p>Cocking sledge</p> Signup and view all the answers

You can proceed with test tap-change operations without ensuring the correct dimensions.

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

The connections C12 must be secured with _____ after gluing.

<p>DELO-DUOPOX AD895</p> Signup and view all the answers

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
  • 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
  • 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
  • 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
  • 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
  • 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.

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