VACUTAP RMV
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Questions and Answers

What percentage of routine inspection work is a visual examination of components in the LTC compartment and motor drive?

  • 90%
  • 50%
  • 80% (correct)
  • 60%

    • What is the primary focus of the presented routine maintenance procedures?

  • RMV-II type VACUTAP LTCs (correct)
  • RMV-A type VACUTAP LTCs
  • Both RMV-I/II and RMV-A type VACUTAP LTCs
  • All types of VACUTAP LTCs

    • What is a necessary prerequisite for performing maintenance on the presented VACUTAP LTCs?

  • Special training in VACUTAP LTC maintenance
  • A general understanding of mechanical systems
  • Basic knowledge of electronics
  • Knowledge corresponding to an MR training for maintenance on the specific LTC type (correct)

    • What is a potential consequence of not following safety guidelines during maintenance?

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

    At what interval should safety checks and part replacements be performed?

    <p>At every maintenance</p> Signup and view all the answers

    What is the typical scope of routine maintenance?

    <p>Visual examination of components</p> Signup and view all the answers

    How often should the maintenance guidelines be reviewed before starting work?

    <p>Before every maintenance</p> Signup and view all the answers

    What is the recommended action for the inspection door gasket during routine maintenance?

    <p>Replace it during every inspection</p> Signup and view all the answers

    What is the recommended replacement schedule for the Brake relay?

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

    What should be done to the oil compartment during the preparation of the LTC for service?

    <p>Wipe it clean with dry rags</p> Signup and view all the answers

    What should be ensured during the external inspection of the LTC?

    <p>The motor drive and monitoring box are grounded</p> Signup and view all the answers

    What is the recommended replacement schedule for the Vacuum Interrupter and flexible (braided) connector?

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

    What should be done to the monitoring system during the preparation of the LTC for service?

    <p>Reset it</p> Signup and view all the answers

    What is the recommended replacement schedule for the Motor Drive mechanism?

    <p>Every 15 years</p> Signup and view all the answers

    What is the purpose of the dehydrating breather silica-gel in the LTC?

    <p>To dry the air</p> Signup and view all the answers

    What is the initial step in removing the position indicator assembly?

    <p>Remove the solenoid wires</p> Signup and view all the answers

    Why is it necessary to set the timing wheel to zero degrees before starting work on the position indicator assembly?

    <p>To ensure the correct position of the LTC</p> Signup and view all the answers

    What is the purpose of hand tightening the mounting hardware during the installation of the new indicator assembly?

    <p>To ensure the axle slides freely into the black drive hub</p> Signup and view all the answers

    What should be checked after re-attaching the solenoid wires?

    <p>The verification of the electrical operation</p> Signup and view all the answers

    What is the purpose of the mechanical reset actuator in the position indicator assembly?

    <p>To reset the hands of the indicator</p> Signup and view all the answers

    Why might it be necessary to loosen the bracing bracket hardware and axle set screws?

    <p>To reposition the indicator assembly</p> Signup and view all the answers

    What is the recommended procedure for tightening the mounting hardware during the installation of the new indicator assembly?

    <p>Hand tighten the mounting hardware and then finish tightening</p> Signup and view all the answers

    What should be checked before starting work on the position indicator assembly?

    <p>The position of the timing wheel</p> Signup and view all the answers

    If a customer has no grounding equipment for the connected tertiary winding after grounding and short-circuiting primary and secondary windings, what should you advise him to do?

    <p>Use a temporary grounding bank to provide a safe path to ground</p> Signup and view all the answers

    Are there any exceptions to the rule that it is not allowed to work on a transformer which is not grounded?

    <p>Yes, during maintenance and repair</p> Signup and view all the answers

    When using a ladder in a substation, what should you bear in mind?

    <p>The stability of the ladder</p> Signup and view all the answers

    What is a transformer in the context of electrical engineering?

    <p>A device that transfers electrical energy from one circuit to another through electromagnetic induction</p> Signup and view all the answers

    What is a preventive auto transformer?

    <p>A type of electrical fault protection device</p> Signup and view all the answers

    What is the function of an On-Load Tap-changer?

    <p>To regulate voltage in a transformer</p> Signup and view all the answers

    In an On-Load Tap-changer, what is the function of the transformer oil?

    <p>To provide electrical insulation</p> Signup and view all the answers

    What does the direction of rotation 'MR-' on a RMV II with selector indicate?

    <p>Counter-clockwise direction</p> Signup and view all the answers

    OT80 screws and nuts can be identified by

    <p>their black oxide coating</p> Signup and view all the answers

    What is the purpose of using OT 30 screws?

    <p>To provide extra grip</p> Signup and view all the answers

    What personal protective equipment (PPE) does a technician typically wear?

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

    What is the recommended action for the supporting documents mentioned in section 1.3?

    <p>Keep them ready at hand and accessible for future use</p> Signup and view all the answers

    What is the purpose of the warning format in section 1.5.1.1?

    <p>To alert the reader to potential dangers</p> Signup and view all the answers

    Where can further information on the product be obtained?

    <p>From the address mentioned in section 1.2</p> Signup and view all the answers

    What is the purpose of the notation conventions in section 1.5?

    <p>To provide an overview of the symbols and textual emphasis</p> Signup and view all the answers

    What is the significance of the address mentioned in section 1.2?

    <p>It is the address for obtaining further information on the product</p> Signup and view all the answers

    What is the purpose of the drawings and illustrations in this technical file?

    <p>To serve as a reference only</p> Signup and view all the answers

    What is the significance of section 1.4?

    <p>It emphasizes the importance of keeping the technical file and supporting documents ready at hand</p> Signup and view all the answers

    What is the purpose of the embedded warning information in section 1.5.1.2?

    <p>To alert the reader to potential dangers within a section</p> Signup and view all the answers

    What must be inspected before fitting the on-load tap-changer to the transformer?

    <p>The on-load tap-changer's oil compartment for shipment damage</p> Signup and view all the answers

    Why is welding adjacent to the epoxy terminal board not recommended?

    <p>It may distort the epoxy terminal board's mounting surface</p> Signup and view all the answers

    What is required around the outside perimeter of the on-load tap-changer mounting flange?

    <p>A 0.25&quot; oil-tight welded seam</p> Signup and view all the answers

    What should be protected from radiant heat when welding?

    <p>The epoxy terminal board and its components</p> Signup and view all the answers

    What should be ensured when mounting the on-load tap-changer on the transformer tank wall?

    <p>The wall is designed to withstand normal operating pressures</p> Signup and view all the answers

    What is a crucial step before fitting the on-load tap-changer to the transformer?

    <p>Inspecting the on-load tap-changer's oil compartment and drive mechanism air compartment for damage</p> Signup and view all the answers

    What should be checked before welding the on-load tap-changer oil compartment onto the transformer's main tank?

    <p>The transformer's main tank opening size</p> Signup and view all the answers

    What should be ensured when welding the on-load tap-changer oil compartment onto the transformer's main tank?

    <p>The welded seam is oil-tight, pressure-tight, and vacuum-proof</p> Signup and view all the answers

    What is the result of connecting leads that place mechanical strain on the on-load tap-changer?

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

    What precaution must be taken before fitting the drive shafts of the motor-drive unit?

    <p>Check the motor protective switch is tripped</p> Signup and view all the answers

    Why is it important to check the serial numbers of the on-load tap-changer and motor-drive unit prior to assembly?

    <p>To confirm they belong together</p> Signup and view all the answers

    What should be done if deviations are detected during the alignment of shafts?

    <p>Contact Reinhausen Manufacturing</p> Signup and view all the answers

    What must be done to the cotter pin before assembling the on-load tap-changer?

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

    How should connecting leads be positioned to avoid mechanical strain?

    <p>Straight and unwarped</p> Signup and view all the answers

    What is the term for the position the on-load tap-changer is shipped in?

    <p>Neutral position</p> Signup and view all the answers

    Which of the following items is essential for following the connection diagram correctly?

    <p>Serial number verification</p> Signup and view all the answers

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