58 Questions
What percentage of routine inspection work is a visual examination of components in the LTC compartment and motor drive?
80%
What is the primary focus of the presented routine maintenance procedures?
RMV-II type VACUTAP LTCs
What is a necessary prerequisite for performing maintenance on the presented VACUTAP LTCs?
Knowledge corresponding to an MR training for maintenance on the specific LTC type
What is a potential consequence of not following safety guidelines during maintenance?
All of the above
At what interval should safety checks and part replacements be performed?
At every maintenance
What is the typical scope of routine maintenance?
Visual examination of components
How often should the maintenance guidelines be reviewed before starting work?
Before every maintenance
What is the recommended action for the inspection door gasket during routine maintenance?
Replace it during every inspection
What is the recommended replacement schedule for the Brake relay?
Every 1,000,000 operations
What should be done to the oil compartment during the preparation of the LTC for service?
Wipe it clean with dry rags
What should be ensured during the external inspection of the LTC?
The motor drive and monitoring box are grounded
What is the recommended replacement schedule for the Vacuum Interrupter and flexible (braided) connector?
Every 1,000,000 operations
What should be done to the monitoring system during the preparation of the LTC for service?
Reset it
What is the recommended replacement schedule for the Motor Drive mechanism?
Every 15 years
What is the purpose of the dehydrating breather silica-gel in the LTC?
To dry the air
What is the initial step in removing the position indicator assembly?
Remove the solenoid wires
Why is it necessary to set the timing wheel to zero degrees before starting work on the position indicator assembly?
To ensure the correct position of the LTC
What is the purpose of hand tightening the mounting hardware during the installation of the new indicator assembly?
To ensure the axle slides freely into the black drive hub
What should be checked after re-attaching the solenoid wires?
The verification of the electrical operation
What is the purpose of the mechanical reset actuator in the position indicator assembly?
To reset the hands of the indicator
Why might it be necessary to loosen the bracing bracket hardware and axle set screws?
To reposition the indicator assembly
What is the recommended procedure for tightening the mounting hardware during the installation of the new indicator assembly?
Hand tighten the mounting hardware and then finish tightening
What should be checked before starting work on the position indicator assembly?
The position of the timing wheel
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?
Use a temporary grounding bank to provide a safe path to ground
Are there any exceptions to the rule that it is not allowed to work on a transformer which is not grounded?
Yes, during maintenance and repair
When using a ladder in a substation, what should you bear in mind?
The stability of the ladder
What is a transformer in the context of electrical engineering?
A device that transfers electrical energy from one circuit to another through electromagnetic induction
What is a preventive auto transformer?
A type of electrical fault protection device
What is the function of an On-Load Tap-changer?
To regulate voltage in a transformer
In an On-Load Tap-changer, what is the function of the transformer oil?
To provide electrical insulation
What does the direction of rotation 'MR-' on a RMV II with selector indicate?
Counter-clockwise direction
OT80 screws and nuts can be identified by
their black oxide coating
What is the purpose of using OT 30 screws?
To provide extra grip
What personal protective equipment (PPE) does a technician typically wear?
All of the above
What is the recommended action for the supporting documents mentioned in section 1.3?
Keep them ready at hand and accessible for future use
What is the purpose of the warning format in section 1.5.1.1?
To alert the reader to potential dangers
Where can further information on the product be obtained?
From the address mentioned in section 1.2
What is the purpose of the notation conventions in section 1.5?
To provide an overview of the symbols and textual emphasis
What is the significance of the address mentioned in section 1.2?
It is the address for obtaining further information on the product
What is the purpose of the drawings and illustrations in this technical file?
To serve as a reference only
What is the significance of section 1.4?
It emphasizes the importance of keeping the technical file and supporting documents ready at hand
What is the purpose of the embedded warning information in section 1.5.1.2?
To alert the reader to potential dangers within a section
What must be inspected before fitting the on-load tap-changer to the transformer?
The on-load tap-changer's oil compartment for shipment damage
Why is welding adjacent to the epoxy terminal board not recommended?
It may distort the epoxy terminal board's mounting surface
What is required around the outside perimeter of the on-load tap-changer mounting flange?
A 0.25" oil-tight welded seam
What should be protected from radiant heat when welding?
The epoxy terminal board and its components
What should be ensured when mounting the on-load tap-changer on the transformer tank wall?
The wall is designed to withstand normal operating pressures
What is a crucial step before fitting the on-load tap-changer to the transformer?
Inspecting the on-load tap-changer's oil compartment and drive mechanism air compartment for damage
What should be checked before welding the on-load tap-changer oil compartment onto the transformer's main tank?
The transformer's main tank opening size
What should be ensured when welding the on-load tap-changer oil compartment onto the transformer's main tank?
The welded seam is oil-tight, pressure-tight, and vacuum-proof
What is the result of connecting leads that place mechanical strain on the on-load tap-changer?
Damage to the on-load tap-changer
What precaution must be taken before fitting the drive shafts of the motor-drive unit?
Check the motor protective switch is tripped
Why is it important to check the serial numbers of the on-load tap-changer and motor-drive unit prior to assembly?
To confirm they belong together
What should be done if deviations are detected during the alignment of shafts?
Contact Reinhausen Manufacturing
What must be done to the cotter pin before assembling the on-load tap-changer?
It must be removed
How should connecting leads be positioned to avoid mechanical strain?
Straight and unwarped
What is the term for the position the on-load tap-changer is shipped in?
Neutral position
Which of the following items is essential for following the connection diagram correctly?
Serial number verification
This quiz covers the importance of following safety guidelines and precautions when operating a load switch to avoid personal injuries, damage, and functional disruptions.
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