Questions and Answers
What should be observed before removing the Geneva cam wheel?
What is the maximum allowable radial clearance between the roller bolt and the roller of the Geneva cam wheel?
What is the first step in the installation process of the gear plate?
What condition necessitates the replacement of the safety diaphragm?
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What is the maximum allowable backlash measurement for the worm wheel and worm drive?
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Which component must be checked for deflection and corrosion during the inspection of the tap changer head cover?
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What is the DIN wrench size for the double ended socket wrench item number 5?
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Which item does not belong to the category of double ended wrenches?
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What is the DIN wrench size for the double ended socket wrench item number 7?
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Which of the following hexagon socket screw key sizes is listed?
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What is the designated figure for the double ended open jaw wrench item number 3?
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Which item corresponds to a DIN wrench size of 13 x 17?
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Which item has a DIN wrench size of 8 x 10, besides item number 5?
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What is the DIN wrench size of item number 6?
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What is the first step in installing the movable contact system into the contact cylinder?
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During the installation process, what should coincide with the guide bolt?
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How should the contact system be positioned before cocking?
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What action is required to engage the cocking hooks during installation?
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What should be checked after installing the movable contact system?
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What is the purpose of the sliding shoes in the installation process?
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What can potentially happen if the screening rails are damaged during installation?
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What is the required distance for the electrode distance between the protective gaps?
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Which component is designated with the number 001 090?
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What is the designation for the tool required for the diverter switch?
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Which supporting component appears multiple times in the parts list?
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What is the part number associated with the energy accumulator lever?
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Which component is categorized as 'complete' in its designation?
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Which designation corresponds to a preassembled drive component?
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What is the designation number for the bumper spring holder?
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Which type of screw has the designation number 450 358?
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What type of product is identified in the content?
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Which part number corresponds to the diverter switch unit mentioned?
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Which manufacturer's name appears in the content?
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Which of the following is not mentioned in the content?
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What is the relevance of the part number '894 421' in the context provided?
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How is the word 'want' positioned in the content?
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The insulating oils used in tap changers must comply with IEC Publ. 422 (1973)
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Inspection of tap changer equipment should be done every two to three years at the latest.
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Only untrained personnel are recommended to conduct inspections on tap changers.
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The water content in insulating oils is not a factor in determining inspection intervals.
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Recommended inspection intervals for tap changers are solely based on the operating through-current.
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Periodic inspection of tap changer equipment is recommended to maintain high reliability in service.
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The specifications for tap changers include recommendations for the dielectric strength of the insulating oil.
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The number of tap changer operations is irrelevant when scheduling inspections.
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The auxiliary washers should be placed between the bolt and the base plate.
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Lock washers must always be removed during the installation of the worm wheel.
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A protective coating is not necessary for the diaphragm during reinstallation.
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The pressure flange can be removed without taking out the screws from the lock washers.
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A suitable backing support is not required for pressing in the replacement bolt and rivet.
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Removal of the rivet is done using a drill size of 11 millimeters.
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Figure 13 illustrates the process for the installation of the roller and circlip.
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Once the roller bolt is checked for a perfect seat, it can be immediately reinstalled without any further steps.
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The removal of the contact system is part of the disassembly process for diverter switch type D0466.
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During the reassembly of the diverter switch insert, the installation of supporting cylinders without the insert head is mandatory.
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The final checks and putting into service is listed as step 16.
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Replacement work on diverter switch D21000 includes tasks for only movable contacts.
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Installation of the movable contact system is outlined as step 12.1 during the reassembly of diverter switch insert.
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Cleaning of the diverter switch unit is part of the replacement work for diverter switch D0466.
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The control work is required after both disassembly and reassembly of the diverter switch unit.
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The energy accumulator spring is mentioned under section 7 for diverter switch maintenance.
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The tap changer head cover should be operated counterclockwise with the hand crank.
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Removing the four nuts M12 requires a wrench size of 19.
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Flushing the oil compartment and tap changer head with new transformer oil is an essential step in cleaning.
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It is advised to operate the motor drive before reinstalling the diverter switch insert.
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The Geneva gear inspection requires removing the gear plate and noting the marks of the indicating discs.
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Pressure springs need to be reinstalled after cleaning the diverter switch oil compartment.
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The remaining oil must be pumped out from the diverter switch oil compartment before inspection.
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The stop valve between the tap changer head and the oil conservator must be closed during flushing.
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The part number 894 421 corresponds to an on-load tap changer type D.
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The term 'MASCHINENFABRIK' signifies a type of safety component in the context provided.
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The parts list indicates that the diverter switch unit has the parts number D 0466.
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The content suggests that the number 451470 represents a product type rather than a part number.
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The term 'REINHAUSEN' refers to the manufacturer of the mentioned electrical components.
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The word 'want' holds significance in identifying a specific component in the reference material.
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Study Notes
Gear Plate Removal and Installation
- Loosen coupling of drive shaft by removing coupling bolt and shifting coupling tube onto the worm shaft.
- Remove four M10 screws (wrench size 17) and locking plates to withdraw the gear plate.
- Observe the roller bolt and the 0-mark position before removing the Geneva cam wheel.
Control Work Procedures
- Check radial clearance between roller bolt and Geneva cam wheel; max clearance is 0.6 mm.
- Inspect worm wheel and worm drive for wear; maximum backlash should be 1.5 mm.
- Replacement procedures are referenced in section 5 on tap changer head.
Gear Plate Reinstallation
- Ensure the sliding disk between the Geneva cam wheel and the bush is in place when reinstalling.
- Follow reverse order of removal for installation, using noted marks and positions.
- Lock fixing screws of the gear plate and coupling bolts after installation.
Tap Changer Head Inspection
- Inspect safety diaphragm for deflection and corrosion; replace if corroded.
- After checking the diaphragm, place the cover back on the tap changer head, ensuring the gasket is intact.
- Visually inspect resistors, laminated paper parts, and check the movement of the movable contact system by rotating the switch spindle.
- Check sliding and output contacts for condition and movability, ensuring electrode distance is 5 mm.
Movable Contact System Installation
- To install, cock the movable contact system into the contact cylinder, ensuring 3 cocking hooks fit properly.
- Engage spring screws of contact springs with the diverter element.
- Rotate the drive element clockwise to cock the contact system until it stops.
- Press auxiliary arcing contacts manually until cocking hooks engage.
- Ensure proper alignment of the 0-mark with the guide bolt while inserting the contact system.
Final Checks and Safety Measures
- Remove cocking hooks by moving the contact system in both switching directions.
- Check for completeness and damage to hooks below the diverter switch after reassembly.
Designation and Tools
- Various wrenches and tools listed for inspection, including a wrench for switching spindle and energy accumulator.
- Specific tools designed for diverter switch installation and maintenance are indicated.
Parts List
- A comprehensive list of parts and their designations essential for maintenance and assembly of the diverter switch unit included.
- Parts include energy accumulator lever, supporting brackets, springs, washers, bolts, and contact system components.
General Notes
- Always follow prescribed procedures and guidelines to ensure safe operation and maintenance of the tap changer and diverter switch systems.
Roller and Slide Square Bolts
- Essential components for the functionality of diverter switches.
- Provide stability and support during operation.
Shock Absorbing Springs
- Integral for reducing impact and vibrations within the system.
- Enhance the reliability and lifespan of electrical components.
Energy Accumulator Spring
- Stores energy for later use, ensuring proper functioning of the diverter switch.
- Critical for maintaining mechanical integrity during operation.
Disassembly of Diverter Switch Insert Type D21000
- Sequential steps include removal of the resistor and contact cylinders.
- Cleaning and control work are necessary for optimal performance.
Reassembly of Diverter Switch Insert
- Installation of components must follow a specific order, starting with the contact cylinder.
- Control checks are crucial to assess mechanical functions and resistance values.
Replacement Work on Diverter Switch D21000
- Focuses on changing movable and stationary arcing contacts.
- Includes replacement of braids for main and auxiliary arcing contacts.
Disassembly of Diverter Switch Type D0466
- Removal processes parallel those of D21000, emphasizing control during disassembly.
- Cleaning ensures reliability and efficiency of the switch.
Reassembly of Diverter Switch Insert D0466
- Similar steps to the D21000 include installation of contact systems and cylinders.
- Mechanical functions and resistance values must be verified post-reassembly.
Replacement Work on Diverter Switch D0466
- Covers details on replacing movable main and auxiliary arcing contacts.
- Shunt contact (movable) replacement is also included.
Installation of Diverter Switch Insert
- Installation procedures require careful attention to alignment and mechanisms.
- Final checks are critical to ensure all components function properly.
Final Checks and Putting into Service
- Tasks include adjusting drive shafts and equalizing rotation lag.
- Trial operations and checks on protective relays and voltage regulators are essential.
General Maintenance Recommendations
- Periodic inspections are vital for maintaining tap changer reliability.
- Insulation oils must meet specific standards regarding dielectric strength and water content.
Cleaning and Inspection of Diverter Switch Oil Compartment
- Recommended to flush oil compartments with new transformer oil, removing contaminants.
- Condition checks on connecting contacts and laminated paper cylinders are crucial.
Replacement Work on Tap Changer Head
- Steps include removing and replacing roller bolts, safety diaphragms, and worm wheels.
- Attention to detail during reinstallation ensures proper functionality and protective coating integrity.
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Description
Test your understanding of mechanical engineering concepts related to gear plates and Geneva cam wheels. This quiz covers the steps of disassembling components and checking necessary clearances. Make sure to understand the tools and procedures involved in this control work.
