Questions and Answers
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.
True
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.
Signup and view all the answers
The diverter switch unit has two poles, referred to as pole U and pole M.
Signup and view all the answers
Detachment and reattachment of the resistor shell is part of the maintenance tasks for the diverter switch.
Signup and view all the answers
Removal of arc chutes is an unnecessary procedure in the cleaning process of the diverter switch.
Signup and view all the answers
Filling with oil is a step that occurs during the initial assembly of the diverter switch unit.
Signup and view all the answers
The maximum torque for the self-locking nut and washer is 9 Nm.
Signup and view all the answers
The flexible contact leads are connected directly to the main switching contacts.
Signup and view all the answers
Each flexible contact lead is attached with a screw M6 x 22.
Signup and view all the answers
There are two flexible contact leads attached to the top and bottom.
Signup and view all the answers
The take-off terminal uses a single M6 x 16 screw.
Signup and view all the answers
XS is expected to be reached before the next inspection.
Signup and view all the answers
The kinematically correct tap is mentioned as a method in the operations sequence.
Signup and view all the answers
Double contact braid is used in the main switching contact.
Signup and view all the answers
An important aspect of the content is the change operations sequence.
Signup and view all the answers
The main contact references only point A.
Signup and view all the answers
SS35C is associated with the next inspection.
Signup and view all the answers
The gear unit can be completely removed by detaching a single coupling bracket from the square tube.
Signup and view all the answers
The section 1.1 is referred to for further details on operations.
Signup and view all the answers
The screws M10/w.s.17 are involved in securing the tap changer cover.
Signup and view all the answers
There are no references to specific percentages in the content.
Signup and view all the answers
The content includes details regarding the inspection process.
Signup and view all the answers
The tap change supervisory circuit remains active during the disassembly process.
Signup and view all the answers
It is necessary to ensure that the gasket is not damaged when removing the cover.
Signup and view all the answers
The cleaning process involves flushing the oil conservator with only wastewater.
Signup and view all the answers
The position indicator dial can be reinstalled in any arbitrary position.
Signup and view all the answers
The adjustment position marks on the tap changer head and support plate must not coincide.
Signup and view all the answers
The oil should be drained until clean oil flows during the cleaning process.
Signup and view all the answers
The maximum tightening torque for the screws on the bevel gear is 9 Nm.
Signup and view all the answers
There is no need to vent the suction pipe before operating the motor drive.
Signup and view all the answers
Coupling in the supervisory circuit refers to the interlinking of positions at the diverter switches of columns 1 and 2.
Signup and view all the answers
The tightening torque for the horizontal drive shaft should be 34 Nm.
Signup and view all the answers
The stop valve is between the protective relay and the oil conservator.
Signup and view all the answers
The valve tappet should not be lifted with a screwdriver.
Signup and view all the answers
Both columns must be in different operating positions when attaching the horizontal drive shaft.
Signup and view all the answers
A slotted bleeder screw is used for venting the suction pipe.
Signup and view all the answers
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.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
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.
