GRIDCON® iTAP®
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Questions and Answers

What is the torque specification for locking with DELO ML 5428?

  • 5 Nm
  • 30 Nm
  • 1 Nm (correct)
  • 10 Nm

    • In what scenario should the replacement of GRIDCON® iTAP® motor-drive unit occur?

  • When upgrading to a new model
  • In case of a defective GRIDCON® iTAP® motor (correct)
  • When the motor is operating normally
  • If alignment issues are detected

    • What should be done prior to performing a risk assessment with the transformer energized?

  • Ensure the micro-switches are installed correctly (correct)
  • Disconnect all power sources
  • Check the alignment of fittings
  • Remove the motor-drive unit

    • Which assembly component requires a torque of 30 Nm?

    <p>M8 x 20 bolts</p> Signup and view all the answers

    What is a crucial step before removing motor control cables?

    <p>Checking the voltage levels first</p> Signup and view all the answers

    What is the first step to ensure safety when working on electrical equipment?

    <p>Disconnect the equipment</p> Signup and view all the answers

    Which step is NOT required to prepare for working on the motor-drive unit?

    <p>Reconnect the supply voltage</p> Signup and view all the answers

    What is the purpose of grounding and short-circuiting during electrical work?

    <p>To prevent accidental restarts</p> Signup and view all the answers

    Which safety precaution should be taken regarding energized parts?

    <p>Put barriers or cover them</p> Signup and view all the answers

    What position must the GRIDCON® iTAP® on-load tap-changer be in before starting any work?

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

    Which of the following is an essential step before disconnecting motor control cables?

    <p>Ensure that the supply voltage is disconnected</p> Signup and view all the answers

    What must be done to the transformer before performing work on the motor-drive unit?

    <p>Disconnect and ground the transformer on all poles</p> Signup and view all the answers

    What major risk is associated with electrical voltage during maintenance?

    <p>Risk of electric shock and fatal injury</p> Signup and view all the answers

    What is the first step to safely remove cables for motor control and micro-switches?

    <p>Remove the grounding screw M8 x 16 together with the cable.</p> Signup and view all the answers

    What needs to be done after removing the grounding screw M8 x 16?

    <p>Remove the motor-drive unit from the sealing module.</p> Signup and view all the answers

    Which of the following describes the procedure to remove the motor-drive unit?

    <p>Open the 4 M6 x 35 cylinder head bolts on the unit.</p> Signup and view all the answers

    What is required during the disconnection of cables attached by the customer?

    <p>Label all cables for accurate reinstallation after disassembly.</p> Signup and view all the answers

    What is the function of the flat sealing in the GRIDCON® iTAP® sealing module?

    <p>To ensure a tight seal and prevent leakage.</p> Signup and view all the answers

    Which procedure is NOT part of proper disassembly of the micro-switches?

    <p>Remove the bolts and replace the switches before reassembling.</p> Signup and view all the answers

    What is the purpose of cleaning the sealing surface during installation?

    <p>To ensure the flat sealing is securely fitted to prevent leakage.</p> Signup and view all the answers

    What is the correct torque specification for M8 x 20 screws?

    <p>30 Nm</p> Signup and view all the answers

    The drive shaft should be rotated in a clockwise direction during tightening torque.

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

    The direction indicator must be aligned in the center between the marks for increased torque.

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

    Marking the rotation of the drive shaft is unnecessary for proper assembly.

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

    The required torque for M8 x 20 screws is 30 Nm.

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

    Increased torque occurs when the vacuum interrupters MSV1 and MSV2 open.

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

    The ECOTAP® VPD® cam disk must be tightened to a torque of 30 Nm using four cylinder head bolts.

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

    The counter washer is used during the tightening process of the ECOTAP® VPD® cam disk.

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

    The adapter for manual operation is used to prevent the intentional rotation of the drive shaft.

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

    The adjustment triangles are a component associated with the alignment of the ECOTAP® VPD® cam disk.

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

    The initial step in tightening the cam disk is to make it fully secure before anything else.

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

    The direction indicator position can be changed after installation.

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

    The torque specification for M8 x 20 screws is 30 Nm.

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

    The grounding screw that needs to be removed is M8 x 16.

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

    An adjustment template is not used when placing the sealing module.

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

    It is necessary to clean the sealing surface before inserting a new sealing.

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

    The adapter for manual operation is inserted into the drive shaft of the ECOTAP® VPD® sealing module.

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

    The sealing flange does not require an adjustment template for installation.

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

    The motor-drive unit must be removed before disconnecting all cables attached by the customer.

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

    The micro-switches S80 and S81 can be removed by loosening M3 x 16 hex head bolts.

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

    Figures included show the use of an adjustment template and inserting a direction indicator.

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

    All motor control cables need to be disconnected before labeling them.

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

    The manual operation adapter can be omitted during assembly.

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

    Inserting the direction indicator is the last step of the assembly process.

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

    Three assemblies are being discussed in the removal instructions.

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

    The installation process includes removing flat sealing from GRIDCON® iTAP® sealing module.

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

    Four M6 x 35 cylinder head bolts are used to secure the motor-drive unit to the sealing module.

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

    The distance between neighboring scale marks on the adjustment template is 10°.

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

    The torque specification for M8 x 20 screws is 30 Nm.

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

    The end position blocking is related to the on-load tap-changer.

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

    Text boxes are used to provide visual instructions regarding the end position blocking.

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

    The mechanical end blocking position indication gear points in the direction of operating position 2.

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

    A torque of 1 Nm is required for locking with DELO ML 5428.

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

    The motor-drive unit GRIDCON® iTAP® should be replaced only if the control cabinet is defective.

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

    The required torque for M8 x 20 screws is specified as 30 Nm.

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

    The installation of micro-switches includes aligning the direction indicator to a specified mark.

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

    The replacement measure for GRIDCON® iTAP® motor-drive unit involves using ECOTAP® VPD® MD&C.

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

    The direction indicator should be aligned at an angle to enhance torque.

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

    Marking the position of the direction indicator is unnecessary when using the adjustment template.

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

    Increased torque occurs while vacuum interrupters are closed.

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

    The adapter for manual operation is rotated to decrease the torque required for adjustments.

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

    The ranking of the table of contents starts from 1.

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

    An adjustment template is utilized for marking the direction indicator's position.

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

    The section titled 'Step-by-Step' has only one subsection.

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

    The 'Control, contactors and micro-switches' section has a subsection dedicated to software updates.

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

    Parts replacement is only referenced once in the entire document.

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

    Section 3.4 focuses on supporting elements like the cylinder and coupling shaft.

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

    The 'Introduction' section of the document clearly states a risk of personal damage.

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

    The torque specification for securing the ECOTAP® VPD® cam disk is more than 30 Nm.

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

    The grounding screw mentioned for removal is M8 x 20.

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

    The adapter for manual operation should be rotated in a clockwise direction to reach the mechanical end position blocking.

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

    Marking the position of the direction indicator is done at the mechanical end position blocking while rotating the adapter.

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

    The cam disk position in the ECOTAP® VPD® sealing flange can be changed after the assembly process.

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

    Each tap on the GRIDCON® iTAP® requires a 360° rotation to complete adjustments.

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

    The size of the tools required for the manual operation adapter is size 12.

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

    The adjusting triangles on the cam disk and micro-switch carrier plate must be unequal during installation.

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

    The torque specification for tightening the sealing flange using M6 x 25 bolts is 6 Nm.

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

    The drive shaft of the ECOTAP® VPD® sealing module should not be aligned with the groove of the drive shaft.

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

    An adjustment template is required to be placed on the sealing flange during installation.

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

    After placing the sealing flange, the next step is to tighten it without adjusting the cam disk.

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

    The drive shaft can freely move in relation to the cam disk during setup.

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

    The torque needed for the M6 x 25 bolts is higher than that for the M8 x 20 screws.

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

    The use of four cylinder head bolts is necessary for tightening the ECOTAP® VPD® cam disk.

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

    What should be done if the GRIDCON® iTAP® motor-drive unit is found to be defective?

    <p>Install a new ECOTAP® VPD® MD&amp;C motor-drive unit</p> Signup and view all the answers

    What is the correct torque specification for locking with DELO ML 5428?

    <p>1 Nm</p> Signup and view all the answers

    How should the installation of micro-switches be approached?

    <p>Fitting washer alignment is necessary during installation</p> Signup and view all the answers

    Which of the following statements regarding the procedure for disassembly of the micro-switches is incorrect?

    <p>All micro-switches are the same and can be treated identically</p> Signup and view all the answers

    What measures should be taken prior to the removal of the motor-drive unit?

    <p>Disconnect all power sources</p> Signup and view all the answers

    What is the primary risk associated with insufficiently qualified personnel performing work on electrical equipment?

    <p>Risk of personal injury or damage</p> Signup and view all the answers

    Which material was used for micro-switches S80/S81 in tap-change supervisory control prior to July 29, 2016?

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

    What is the action required if new version micro-switches are already installed and they fail?

    <p>They need to be replaced immediately</p> Signup and view all the answers

    What is required to ensure proper maintenance of the relevant on-load tap-changer type?

    <p>Following specific safety instructions</p> Signup and view all the answers

    What should be done with the diverter switch insert before performing maintenance?

    <p>It should be removed</p> Signup and view all the answers

    Which action does NOT correspond to the proper replacement of micro-switches in the supervisory control?

    <p>Replacing only if the unit is outdated</p> Signup and view all the answers

    What must be provided in advance by the OPS for maintenance tasks?

    <p>The necessary parts via SETERSATZ</p> Signup and view all the answers

    To ensure safe work practices, what aspect is emphasized in the instructions?

    <p>Profound knowledge and experience are necessary</p> Signup and view all the answers

    What direction should the adapter be rotated for manual operation until the mechanical end position is blocked?

    <p>Clockwise until the end position is reached</p> Signup and view all the answers

    What indicates the correct position of the mechanical end position blocking during adjustment?

    <p>The position of the direction indicator</p> Signup and view all the answers

    Which of the following is associated with marking the mechanical end position during rotation?

    <p>The indication on the adjusting template</p> Signup and view all the answers

    Which task must be done while rotating in the clockwise direction?

    <p>Marking the main direction indicator position</p> Signup and view all the answers

    What is the purpose of marking the position of the direction indicator?

    <p>To align the mechanical end position precisely</p> Signup and view all the answers

    What is the torque specification for the cylinder head bolts when installing the adapter plate?

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

    What must be done to the adapter before activating the ECOTAP® VPD® sealing module?

    <p>Remove the adapter for manual activation</p> Signup and view all the answers

    Which component reveals the operating position of the ECOTAP® VPD® sealing module?

    <p>Inspection window</p> Signup and view all the answers

    What is the correct action to take after loosening the bolts on the ECOTAP® VPD® motor cover?

    <p>Remove the motor cover with motor</p> Signup and view all the answers

    Which procedure must be confirmed to match before starting work on the ECOTAP® VPD® sealing module?

    <p>Operating position of the indication gear</p> Signup and view all the answers

    What should be ensured about the grounding screw M8 x 16 during maintenance?

    <p>It needs to be removed before starting work</p> Signup and view all the answers

    What is the first step when installing the sealing into the groove of the adapter plate?

    <p>Clean the sealing surface</p> Signup and view all the answers

    How many M6 x 30 bolts are specified for removing the ECOTAP® VPD® motor cover?

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

    What must be aligned with the groove of the drive shaft during the assembly process?

    <p>Feather key of the drive shaft</p> Signup and view all the answers

    What should be done to the cam disk during assembly to ensure proper alignment?

    <p>Its adjustment triangles must be equal.</p> Signup and view all the answers

    What is the required torque setting for tightening hex head bolts M6 x 25?

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

    Which of the following actions should NOT be taken during the assembly of the ECOTAP® VPD® sealing module?

    <p>Rotate the cam disk independently of the drive shaft.</p> Signup and view all the answers

    What must be verified before placing the adjustment template on the sealing flange?

    <p>The cam disk is aligned correctly.</p> Signup and view all the answers

    How should the sealing flange be positioned during installation?

    <p>On the adapter plate and tightened securely.</p> Signup and view all the answers

    What is the significance of the adjusting triangles on the cam disk and micro-switch carrier plate?

    <p>They must remain equal for proper functionality.</p> Signup and view all the answers

    What should be the focus while tightening the hex head bolts of the sealing flange?

    <p>Verify the torque against the specifications.</p> Signup and view all the answers

    Study Notes

    Removal Steps

    • Remove cables for motor control and micro-switches S80/81 between motor-drive unit and control cabinet.
    • Remove 1 grounding screw M8 x 16 together with cable.
    • Open 4 M6 x 35 cylinder head bolts.
    • Remove motor-drive unit incl. motor plate from the sealing module.
    • Remove GRIDCON® iTAP® motor incl. motor plate from the sealing module.
    • Loosen hex. head bolts 4 M3 x 16 of micro-switches and remove micro-switch S80/S81 from the sealing module.
    • At the control cabinet GRIDCON® iTAP, label all cables attached by the customer and disconnect them.
    • Disassemble the control cabinet.
    • Remove flat sealing from GRIDCON® iTAP® sealing module.
    • Clean sealing surface and insert new sealing.
    • Perform a risk assessment if it’s possible to perform this task with the transformer being energized.

    Installation Notes

    • Locking washer alignment - Torque: 1 Nm
    • Locking with DELO ML 5428

    Replacing GRIDCON® iTAP® Motor-Drive Unit with ECOTAP® VPD® MD&C

    • This section describes the replacement of the motor-drive unit GRIDCON® iTAP® with the motor-drive unit ECOTAP® VPD® MD&C.
    • This measure must be performed in case of a defective GRIDCON® iTAP® motor or control cabinet.
    • Before:
      • GRIDCON® iTAP® motor and motor plate
      • GRIDCON® iTAP® sealing module
    • After:
      • ECOTAP® VPD® motor cover
      • ECOTAP® VPD® sealing module with sealing flange and indication gear
      • Adapter plate
      • GRIDCON® iTAP® sealing module

    Preparatory Work

    • The motor-drive unit of the OLTC on the transformer cover must be accessible.
    • The facility operator must disconnect and ground the transformer on all poles.
    • The supply voltage and any available signal voltages of the GRIDCON® iTAP® control cabinet must be disconnected.
    • The on-load tap-changer GRIDCON® iTAP® must be in operating position 5.

    Safety Regulations

    • DANGER - Electric shock! Risk of fatal injury due to electrical voltage.
    • Always observe the following safety regulations when working in or on electrical equipment:
      • Disconnect the equipment.
      • Provide safeguard to prevent unintentional restart.
      • Make sure all poles are de-energized.
      • Ground and short-circuit.
      • Cover adjacent, energized parts or put barriers.

    Removing the Motor Drive Unit

    • Remove the cables for motor control and micro-switches S80/81 that connect the motor drive unit to the control cabinet.
    • Before removing the grounding screw M8 x 16, label any attached cables.

    Removing the Sealing Module

    • Open four M6 x 35 cylinder head bolts to remove the motor drive unit, including the motor plate, from the sealing module.
    • Remove the motor drive unit from the sealing module.
    • Remove the GRIDCON® iTAP® motor, including the motor plate, from the sealing module.
    • Loosen four M3 x 16 hex head bolts on the micro-switches and remove the micro-switches S80/S81 from the sealing module.

    Installing the Adapter for Manual Operation

    • Remove the flat sealing from the GRIDCON® iTAP® sealing module. Clean the sealing surface and insert a new sealing.
    • Install a direction indicator on the adapter for manual operation.
    • Insert the adapter for manual operation with the direction indicator into the drive shaft of the ECOTAP® VPD® sealing module.

    Aligning the Cam Disk

    • Rotate the adapter for manual operation 6 cm so that the direction indicator is aligned in the center between the marks with increased torque.

    Tightening the Cam Disk

    • Tighten the ECOTAP® VPD® cam disk with a 6 cm counter washer using three M4 x 20 cylinder head bolts twice until hand-tight.

    Checking the Mechanical End Blocking Position

    • Verify that the distance between neighboring scale marks on the adjustment template is 5°.
    • Use the adapter for manual operation to prevent unintentional rotation of the drive shaft of the ECOTAP® VPD® sealing module.

    Replacing GRIDCON® iTAP® motor-drive unit with ECOTAP® VPD® MD&C

    • This procedure involves replacing the GRIDCON® iTAP® motor-drive unit with the ECOTAP® VPD® MD&C unit.
    • This replacement is necessary when the GRIDCON® iTAP® motor or control cabinet is defective.
    • Align the feather key of the drive shaft of the ECOTAP® VPD® sealing module to the groove of the drive shaft of the GRIDCON® iTAP® sealing module.
    • Place the sealing flange of the ECOTAP® VPD® sealing module onto the adapter plate and tighten the hex. head bolts to 6 Nm.
    • Align the cam disk if necessary, ensuring the adjusting triangles on the cam disk and micro-switch carrier plate in the ECOTAP® VPD® sealing module are equal.
    • Use the adjustment template to rotate the adapter for manual operation in a counterclockwise direction until the mechanical end position blocking of the GRIDCON® iTAP® on-load tap-changer is reached.
    • Mark the position of the direction indicator on the adjustment template at the position of the mechanical end position blocking of the GRIDCON® iTAP® on-load tap-changer while rotating in a counterclockwise direction.
    • Operate the GRIDCON® iTAP® on-load tap-changer back to the adjustment position of the ECOTAP® VPD® sealing module's indication gear by rotating the adapter for manual operation.
    • Rotate the adapter for manual operation in a clockwise direction until the torque noticeably increases (opening of vacuum interrupters MSV1). Mark the position of the direction indicator on the adjustment template.
    • The tap position indicator of the GRIDCON® iTAP® on-load tap-changer must not be changed.

    Safety Precautions

    • Ensure personnel are adequately qualified for the task.
    • Always adhere to safety instructions.
    • Failure to comply with instructions may result in personal injury, property damage, or equipment malfunction.
    • Read operating instructions carefully before starting any work.
    • Profound knowledge and experience acquired during MR training are required for maintenance work.
    • The diverter switch insert (or selector switch insert) must be removed.

    Maintenance Procedures

    • The instructions include procedures for tests, condition-based parts replacement, and parts replacement after a fixed number of tap-change operations intervals.
    • A one-time retrofit and modification procedure is described for replacing micro-switches in the tap-change supervisory control.

    Micro-Switch Replacement

    • Prior to July 28, 2016, micro-switches used silver contact material.
    • After July 28, 2016, the contact material was changed to silver-nickel, galvanized with gold.
    • During maintenance, replace old version micro-switches with the new version.
    • If the new version is already installed, only replace them if they fail.
    • The OPS is responsible for providing the necessary parts in advance.
    • Conduct a risk assessment to determine if replacement can be performed while the transformer is energized.

    ECOTAP® VPD® MD&C Motor-Drive Unit Replacement

    • The document describes how to replace the GRIDCON® iTAP® motor-drive unit with the ECOTAP® VPD® MD&C motor-drive unit.
    • This replacement is necessary in case of a defective GRIDCON® iTAP® motor or control cabinet.

    Installation of ECOTAP® VPD® Motor Unit

    • Install the adapter plate to the GRIDCON® iTAP® sealing module and tighten the cylinder head bolts to 8 Nm.
    • Insert the sealing into the groove of the adapter plate.
    • Remove the ECOTAP® VPD® motor cover and adapter for manual activation from the ECOTAP® VPD® sealing module.
    • Align the feather key of the drive shaft of the ECOTAP® VPD® sealing module to the groove of the drive shaft of the GRIDCON® iTAP® sealing module.

    Alignment and Marking Procedures

    • Align the cam disk, as necessary, to ensure the adjusting triangles on the cam disk and micro-switch carrier plate in the ECOTAP® VPD® sealing module are equal.
    • Use an adjustment template to mark the end positions of the drive shaft rotation.
    • Rotate the adapter for manual operation in the clockwise direction.
    • Mark the position of the direction indicator on the adjustment template at the mechanical end position blocking of the GRIDCON® iTAP® while rotating clockwise.

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    Print_EN_GRIDCON iTAP PDF - Maintenance Manual

    Description

    This quiz covers the steps involved in removing and replacing the GRIDCON® iTAP® motor-drive unit. It includes instructions for disassembling components, preparing for installation, and ensuring proper alignment and sealing. Important safety considerations and torque specifications are also highlighted.

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