Podcast
Questions and Answers
The diverter switch can only be cleaned in the dismantled state.
The diverter switch can only be cleaned in the dismantled state.
False
Setting the mid-position is a necessary step for the operation of pole W.
Setting the mid-position is a necessary step for the operation of pole W.
True
Locking-in of the diverter switch occurs after the assembly of the contact shell.
Locking-in of the diverter switch occurs after the assembly of the contact shell.
True
The contact wear determination is an optional step when maintaining the diverter switch.
The contact wear determination is an optional step when maintaining the diverter switch.
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The diverter switch unit has two poles, referred to as pole U and pole M.
The diverter switch unit has two poles, referred to as pole U and pole M.
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Detachment and reattachment of the resistor shell is part of the maintenance tasks for the diverter switch.
Detachment and reattachment of the resistor shell is part of the maintenance tasks for the diverter switch.
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Removal of arc chutes is an unnecessary procedure in the cleaning process of the diverter switch.
Removal of arc chutes is an unnecessary procedure in the cleaning process of the diverter switch.
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Filling with oil is a step that occurs during the initial assembly of the diverter switch unit.
Filling with oil is a step that occurs during the initial assembly of the diverter switch unit.
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The maximum torque for the self-locking nut and washer is 9 Nm.
The maximum torque for the self-locking nut and washer is 9 Nm.
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The flexible contact leads are connected directly to the main switching contacts.
The flexible contact leads are connected directly to the main switching contacts.
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Each flexible contact lead is attached with a screw M6 x 22.
Each flexible contact lead is attached with a screw M6 x 22.
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There are two flexible contact leads attached to the top and bottom.
There are two flexible contact leads attached to the top and bottom.
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The take-off terminal uses a single M6 x 16 screw.
The take-off terminal uses a single M6 x 16 screw.
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XS is expected to be reached before the next inspection.
XS is expected to be reached before the next inspection.
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The kinematically correct tap is mentioned as a method in the operations sequence.
The kinematically correct tap is mentioned as a method in the operations sequence.
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Double contact braid is used in the main switching contact.
Double contact braid is used in the main switching contact.
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An important aspect of the content is the change operations sequence.
An important aspect of the content is the change operations sequence.
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The main contact references only point A.
The main contact references only point A.
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SS35C is associated with the next inspection.
SS35C is associated with the next inspection.
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The gear unit can be completely removed by detaching a single coupling bracket from the square tube.
The gear unit can be completely removed by detaching a single coupling bracket from the square tube.
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The section 1.1 is referred to for further details on operations.
The section 1.1 is referred to for further details on operations.
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The screws M10/w.s.17 are involved in securing the tap changer cover.
The screws M10/w.s.17 are involved in securing the tap changer cover.
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There are no references to specific percentages in the content.
There are no references to specific percentages in the content.
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The content includes details regarding the inspection process.
The content includes details regarding the inspection process.
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The tap change supervisory circuit remains active during the disassembly process.
The tap change supervisory circuit remains active during the disassembly process.
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It is necessary to ensure that the gasket is not damaged when removing the cover.
It is necessary to ensure that the gasket is not damaged when removing the cover.
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The cleaning process involves flushing the oil conservator with only wastewater.
The cleaning process involves flushing the oil conservator with only wastewater.
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The position indicator dial can be reinstalled in any arbitrary position.
The position indicator dial can be reinstalled in any arbitrary position.
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The adjustment position marks on the tap changer head and support plate must not coincide.
The adjustment position marks on the tap changer head and support plate must not coincide.
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The oil should be drained until clean oil flows during the cleaning process.
The oil should be drained until clean oil flows during the cleaning process.
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The maximum tightening torque for the screws on the bevel gear is 9 Nm.
The maximum tightening torque for the screws on the bevel gear is 9 Nm.
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There is no need to vent the suction pipe before operating the motor drive.
There is no need to vent the suction pipe before operating the motor drive.
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Coupling in the supervisory circuit refers to the interlinking of positions at the diverter switches of columns 1 and 2.
Coupling in the supervisory circuit refers to the interlinking of positions at the diverter switches of columns 1 and 2.
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The tightening torque for the horizontal drive shaft should be 34 Nm.
The tightening torque for the horizontal drive shaft should be 34 Nm.
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The stop valve is between the protective relay and the oil conservator.
The stop valve is between the protective relay and the oil conservator.
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The valve tappet should not be lifted with a screwdriver.
The valve tappet should not be lifted with a screwdriver.
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Both columns must be in different operating positions when attaching the horizontal drive shaft.
Both columns must be in different operating positions when attaching the horizontal drive shaft.
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A slotted bleeder screw is used for venting the suction pipe.
A slotted bleeder screw is used for venting the suction pipe.
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Study Notes
Cleaning the Diverter Switch
- Specific maintenance tasks include cleaning the diverter switch and determining contact wear.
- Important cleaning procedures involve the oil compartment, tap changer oil conservator, and diverter switch unit.
Maintenance Steps for Diverter Switch
- Detach and clean various components:
- Contact shell
- Arc chutes
- Resistor shell
- Set the mid-position for optimal function during assembly.
Diverter Switch Unit Components
- Inspection focuses on two-pole diverter switch unit in GFRP design established post-1988.
- Tasks include:
- Measurement of transition resistors
- Removal of supporting cylinders and necessary cleaning
Diverter Switch Contact Replacement
- Replacement involves:
- Diverter switch contacts
- Flexible contact leads
- Details about installation and secure attachment of leads essential for functionality.
Safety and Precautions
- Always disconnect the tap change supervisory circuit before inspection to ensure safety.
- Drain and flush the oil conservator with clean oil to maintain system integrity.
Positioning and Adjustment
- Ensure the marks on the tap changer head and support plate align for proper adjustment.
- Pay attention to the sequence of operations when engaging the drive shafts connected to the diverter switch.
Flexibility of Contact Leads
- Flexible contact leads must be securely attached at the take-off terminal to prevent operational failures.
- Proper torque settings critical for securing connections for reliable performance.
Electrical Monitoring
- Verify the tap change supervisory circuit to ensure accurate position indication during maintenance.
- Operational readiness of the motor drive required to facilitate tap changer adjustments.
General Assembly and Reassembly
- Follow systematic reassembly procedures for diverter switch components to maintain functionality and reliability.
- Confirm that both columns of the tap changer operate symmetrically after reassembly.
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Description
This quiz covers essential procedures for maintaining electrical components, focusing on the diverter switch and its associated tasks. Topics include cleaning the diverter switch, determination of contact wear, and reattachment techniques. Test your knowledge and understanding of these critical maintenance skills.
