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Questions and Answers
What is the purpose of the bevel gear in the tap changer assembly?
What is the purpose of the bevel gear in the tap changer assembly?
Which part requires a borehole of diameter 8.2 mm when preparing for installation?
Which part requires a borehole of diameter 8.2 mm when preparing for installation?
What is indicated by the instruction to maintain a clearance of about 2 mm?
What is indicated by the instruction to maintain a clearance of about 2 mm?
Which of the following components is NOT part of the standard version of the assembly?
Which of the following components is NOT part of the standard version of the assembly?
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Why is it important to grease all O-rings during assembly?
Why is it important to grease all O-rings during assembly?
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What must be done with the guard plate according to the installation instructions?
What must be done with the guard plate according to the installation instructions?
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Which assembly step is specifically related to preventing corrosion?
Which assembly step is specifically related to preventing corrosion?
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What component secures the coupling bolt in the installation procedure?
What component secures the coupling bolt in the installation procedure?
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What is the primary function of the protective relay in the context provided?
What is the primary function of the protective relay in the context provided?
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Which of the following is NOT mentioned as a necessary action for the protective relay?
Which of the following is NOT mentioned as a necessary action for the protective relay?
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What element connects the tap changer head and the protective relay?
What element connects the tap changer head and the protective relay?
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Which of the following correctly describes the protective relay as per the content?
Which of the following correctly describes the protective relay as per the content?
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What is indicated by the dimensions mentioned in the document?
What is indicated by the dimensions mentioned in the document?
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In which setting should the protective relay be installed?
In which setting should the protective relay be installed?
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What manufacturer is associated with the protective relay mentioned?
What manufacturer is associated with the protective relay mentioned?
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What aspect of the protective relay's functionality is emphasized in the content?
What aspect of the protective relay's functionality is emphasized in the content?
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What is the primary activity described in the document?
What is the primary activity described in the document?
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Which language is NOT represented in the document?
Which language is NOT represented in the document?
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What component is specifically mentioned for driving shaft applications?
What component is specifically mentioned for driving shaft applications?
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What measurement unit is primarily used in the dimensions section of the document?
What measurement unit is primarily used in the dimensions section of the document?
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Which of the following best describes the term 'Alberti comando' as used in the document?
Which of the following best describes the term 'Alberti comando' as used in the document?
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In what context is 'bei Montage bohren' mentioned?
In what context is 'bei Montage bohren' mentioned?
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What does 'Maschinenfabrik' mean in the context of the document?
What does 'Maschinenfabrik' mean in the context of the document?
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Which part of the document mentions specifications related to drilling?
Which part of the document mentions specifications related to drilling?
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Which component is described as having a sealed design?
Which component is described as having a sealed design?
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What is the purpose of the connection facility for the protective relay RS 1000?
What is the purpose of the connection facility for the protective relay RS 1000?
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Which component is directly associated with the driving shaft?
Which component is directly associated with the driving shaft?
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What function does the air vent serve within the mounting flange?
What function does the air vent serve within the mounting flange?
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Which of the following components is crucial for inspecting the internal status of the tap changer?
Which of the following components is crucial for inspecting the internal status of the tap changer?
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What is indicated by the term 'output terminal of on-load tap changer'?
What is indicated by the term 'output terminal of on-load tap changer'?
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Which component primarily supports the operational mechanism of the tap changer?
Which component primarily supports the operational mechanism of the tap changer?
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What is the significance of the head gasket in this system?
What is the significance of the head gasket in this system?
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Which component is essential for the functionality of the safety diaphragm?
Which component is essential for the functionality of the safety diaphragm?
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What role does the coupling play in this assembly?
What role does the coupling play in this assembly?
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What is the exterior diameter specified in the document?
What is the exterior diameter specified in the document?
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What is the thickness of the washer mentioned?
What is the thickness of the washer mentioned?
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What diameter is specified for the lower lens head screw?
What diameter is specified for the lower lens head screw?
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How is the three-part blind gland plate related to the cabinet?
How is the three-part blind gland plate related to the cabinet?
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What is the configuration of the fixing holes in the cabinet according to the document?
What is the configuration of the fixing holes in the cabinet according to the document?
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What is the function of the aperture in the cabinet?
What is the function of the aperture in the cabinet?
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Which component is indicated to be opened by 180 degrees?
Which component is indicated to be opened by 180 degrees?
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What is the implied relationship between the upper and lower mounting as described?
What is the implied relationship between the upper and lower mounting as described?
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One tap change requires 25 revolutions of the driving shaft.
One tap change requires 25 revolutions of the driving shaft.
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The diverter switch oil tank is located above the tap changer head.
The diverter switch oil tank is located above the tap changer head.
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A suction pipe is included by default in the tap changer assembly.
A suction pipe is included by default in the tap changer assembly.
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The tap changer head contains a reduction gear and a spring-operated energy accumulator.
The tap changer head contains a reduction gear and a spring-operated energy accumulator.
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The main function of the diverter switch is to effect a break in the current transfer.
The main function of the diverter switch is to effect a break in the current transfer.
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The tap selector selects the tap after the diverter switch executes the tap change.
The tap selector selects the tap after the diverter switch executes the tap change.
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Residual gas escaping is managed through vent pipes located under the tap changer head.
Residual gas escaping is managed through vent pipes located under the tap changer head.
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The protective relay RS 1000 is connected to the tap changer head via the oil conservator.
The protective relay RS 1000 is connected to the tap changer head via the oil conservator.
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The on-load tap changer type D III 200 can operate at a rated current of 600 A.
The on-load tap changer type D III 200 can operate at a rated current of 600 A.
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A single-pole on-load tap changer is available with a rated current of 800 A.
A single-pole on-load tap changer is available with a rated current of 800 A.
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The On-Load Tap Changer Type D has an option for a changeover selector in both three-pole and single-pole configurations.
The On-Load Tap Changer Type D has an option for a changeover selector in both three-pole and single-pole configurations.
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The largest on-load tap changer described has a rated current of 1400 A.
The largest on-load tap changer described has a rated current of 1400 A.
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The document includes instructions for the assembly of the on-load tap changer exclusively for three-pole versions.
The document includes instructions for the assembly of the on-load tap changer exclusively for three-pole versions.
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The section regarding 'Drying Out the On-Load Tap Changer' is the last step in the assembly instructions.
The section regarding 'Drying Out the On-Load Tap Changer' is the last step in the assembly instructions.
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All versions of the on-load tap changer type D can be installed in a wye-connected tap winding arrangement.
All versions of the on-load tap changer type D can be installed in a wye-connected tap winding arrangement.
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Preliminary testing is part of the installation process for the on-load tap changer.
Preliminary testing is part of the installation process for the on-load tap changer.
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The bevel gear CD 6300-300 is specified to have a driving shaft for the on-load tap changer.
The bevel gear CD 6300-300 is specified to have a driving shaft for the on-load tap changer.
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The motor drive unit MA 4 has a dimension drawing number of N 1271.7 e.
The motor drive unit MA 4 has a dimension drawing number of N 1271.7 e.
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The protective relay is connected to the tap changer head using a wired connection only.
The protective relay is connected to the tap changer head using a wired connection only.
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The document indicates that a mounting flange is an example of a component that is not referenced in dimensioning.
The document indicates that a mounting flange is an example of a component that is not referenced in dimensioning.
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There is a requirement to maintain a clearance of 2 mm when installing the driving shafts.
There is a requirement to maintain a clearance of 2 mm when installing the driving shafts.
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The driving shafts are directly associated with the MA 2 motor drive unit.
The driving shafts are directly associated with the MA 2 motor drive unit.
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The installation instructions specify the guard plate as a critical part to prevent corrosion.
The installation instructions specify the guard plate as a critical part to prevent corrosion.
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The term 'Maschinenfabrik' translates to 'machine factory' in English.
The term 'Maschinenfabrik' translates to 'machine factory' in English.
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The oil tank bottom is identified as component number 33.
The oil tank bottom is identified as component number 33.
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The driving shaft connects the on-load tap-changer head to the oil conservator.
The driving shaft connects the on-load tap-changer head to the oil conservator.
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Component 48 serves as connecting leads for the tap selector and diverter switch.
Component 48 serves as connecting leads for the tap selector and diverter switch.
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The safety diaphragm is listed as component number 16.
The safety diaphragm is listed as component number 16.
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The bevel gearing is identified as component number 72.
The bevel gearing is identified as component number 72.
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The inspection window is designated as component number 15.
The inspection window is designated as component number 15.
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The locking plate for blocking the Geneva drive is labeled as component 46.
The locking plate for blocking the Geneva drive is labeled as component 46.
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The output terminal of the on-load tap-changer is part of component 36.
The output terminal of the on-load tap-changer is part of component 36.
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The purpose of the air vent is to relieve excess pressure within the transformer tank.
The purpose of the air vent is to relieve excess pressure within the transformer tank.
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The coupling mentioned is situated directly above the transformer cover.
The coupling mentioned is situated directly above the transformer cover.
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The on-load tap changer head gasket has a sealed design.
The on-load tap changer head gasket has a sealed design.
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The driving shaft is indirectly connected to the output terminal of the on-load tap changer.
The driving shaft is indirectly connected to the output terminal of the on-load tap changer.
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The connection facility for the protective relay RS 1000 is meant for drainage purposes.
The connection facility for the protective relay RS 1000 is meant for drainage purposes.
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The safety diaphragm plays a crucial role in controlling oil flow within the diverter switch oil tank.
The safety diaphragm plays a crucial role in controlling oil flow within the diverter switch oil tank.
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The clearance requirement of about 2 mm is crucial to prevent interference between moving parts.
The clearance requirement of about 2 mm is crucial to prevent interference between moving parts.
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The function of the air vent is to prevent expansion of oil in the oil tank.
The function of the air vent is to prevent expansion of oil in the oil tank.
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The couplings used in the assembly do not require any form of lubrication during installation.
The couplings used in the assembly do not require any form of lubrication during installation.
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The protective relay RS 1000 is a mandatory component for all configurations of the tap changer.
The protective relay RS 1000 is a mandatory component for all configurations of the tap changer.
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A hexagon cap screw is required alongside the driving shaft in the assembly.
A hexagon cap screw is required alongside the driving shaft in the assembly.
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The inspection window is directly related to assessing the internal components of the diverter switch.
The inspection window is directly related to assessing the internal components of the diverter switch.
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Study Notes
Tap Changer Overview
- Consider dimensions
a1
anda2
as per version 1.15 during installation. - Includes driving shaft connecting tap changer head (100) to motor drive (111) via bevel gear (106).
Standard Version Components
- Guard Plate (101): Protective element for tap changer.
-
Driving Shaft Options:
- Horizontal with flange coupling (102)
- Horizontal with sliding coupling (103, 104)
- Fastenings (105): Includes coupling bolts, crown nuts, washers, and cotter pins.
- Bevel Gear (106): Designated CD 6300-300, refer to Dimension Drawing N 1341.
- Protective Tubes (107 & 108): Upper and lower tubes ensuring safety.
Mounting Instructions
- Lubrication (5.21): Apply grease to O-rings on components (100, 104, 106, 107, 110, and 111).
-
Guard Plate Adjustment (5.22): Shorten to dimension
z - 2
. -
Driving Shaft Preparation (5.23):
- Shorten shaft (102 or 103) to dimension
L
. - Drill borehole of diameter 8.2 mm for coupling bolt (105).
- Maintain clearance of about 2 mm between the driving shaft and tap changer head/bevel gear.
- Shorten shaft (102 or 103) to dimension
-
Installation (5.24):
- Fit horizontal driving shaft, secure with coupling bolt, crown nut, and cotter pin.
- Install guard plate (101).
Electrical and Mechanical Connections
- Protective relay RS 1000 is crucial for safety—must disconnect transformer if energized.
- Clear documentation for connection facilities, ensuring proper assembly and functionality.
General Considerations
- Regular lubrication and thorough inspection of components are vital for operational efficiency.
- All components must follow precise measurements to ensure compatibility and safety during operation.
On-Load Tap Changer Type D - Overview
- On-load tap changer Type D manufactured by Maschinenfabrik Reinhausen, designed for use in transformers.
- Available variants: D III 200, D III 400, DI 400, DI 800, DI 1200, and configurations with three single-pole changers.
General Specifications
- D III 200 offers three-pole operation, rated currents of 200 A or 400 A.
- DI 400 features single-pole operation with rated current of 400 A.
- DI 800 and DI 1200 have single-pole design with increasing rated currents of 800 A and 1200 A respectively.
Construction and Operation
- Consists of diverter switch and tap selector; facilitates no-break transfer of current.
- Diverter switch first selects the tap before executing the change.
- Installed within transformer, utilizing reduction gears and spring-operated energy accumulators for operation.
- Requires 33 revolutions of the driving shaft for each tap change.
Components
- Tap changer head contains critical mechanical elements, including gears and connectors for external pipes leading to oil conservators or drains.
- Diverter switch oil tank isolates transformer oil from the diverter switch oil, ensuring operational integrity.
- Safety features include air vent pipes and inspection windows for monitoring functionality.
Assembly and Installation
- Steps include preparation, installation into the transformer, and conducting preliminary tests.
- Ensures appropriate connection to protective relay RS 1000, bevel gear assembly, and motor drive unit.
- Final assembly stages confirm all connections and mechanical integrity before operation.
Operational Procedures
- Involves trial switching operations to ensure correct functionality.
- Guidelines for transporting the transformer and setting up on-site for operation.
Maintenance
- Regular oil changes and revisions are necessary for optimal performance and longevity of the tap changer.
Additional Information
- Installation drawings and dimension specifications available in appendices for reference.
- Guidelines ensure correct assembly and functional specifications for various configurations of the on-load tap changer.
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Description
This quiz covers the components and dimensions of tap changers as outlined in version 1.15, focusing on the connection between the tap changer head and the motor drive. It will also examine related parts and their standard configurations. Test your understanding of these mechanical systems!