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What is the rated duration of short circuits for all models of VACUTAP® VRD/VRF/VRG III?
Which VACUTAP® model has the lowest maximum rated through current?
What is the maximum rated step voltage for the VACUTAP® VRF III models?
For the VACUTAP® models, what is the rated peak withstand current for the VRD III 1300 Y?
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Which of the following models has a step capacity of 3000 kVA?
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What is a key characteristic that differentiates the VACUTAP VR® I from the VR® III model?
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Which component describes the VACUTAP® VRC's ability to handle electrical arc furnace operations?
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In the context of on-load tap-changers, what does the abbreviation HD signify?
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Which of the following is NOT typically considered in the technical data of an on-load tap-changer?
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Which aspect of the VACUTAP® series involves alterations since the time of publication?
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What is the primary purpose of the step capacity diagram for the VACUTAP® VRC?
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Which section within the document would you refer to for specific operational connections?
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What is a potential liability concern according to the content provided?
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Which step capacity diagram corresponds to the VRD, VRF, VRG models under electrical arc furnace operation?
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What is the primary purpose of the rated insulation level in the context of VACUTAP® models?
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What is the maximum operating voltage on the individual tap selector distances relative to the rated short-duration power frequency withstand voltages?
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What response voltage is specified for the varistor at 1.2/50 µs lightning impulse?
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What is the residual voltage at a peak current of 3 kA for the varistor?
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Which of the following distances is omitted for single-pole on-load tap-changers?
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Which rated withstand voltage corresponds to the insulation of the internal on-load tap-changer?
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What is the maximum rated through current for the VACUTAP® VRC I HD model?
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Which model has the highest rated peak withstand current?
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How long is the rated duration of short-circuits for the VACUTAP® VRC I HD models?
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What is the step capacity (PStN) of the VRC I HD 701 model?
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Which of the following statements is true regarding the maximum rated step voltage?
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What does the VACUTAP® VRC/VRE model incorporate without tie-in resistors?
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Which VACUTAP® model utilizes the part number 899941?
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For which VACUTAP® model is the size E tap selector specifically mentioned?
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What is a common feature of the VACUTAP® VRD/VRF models with size C/D?
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Which part number corresponds to the VACUTAP® VRD/VRF, size C/D, with a potential switch?
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What feature does the VACUTAP® VRD/VRF III WR model include?
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Which of the following models accurately describes one that includes potential switches?
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What is specifically depicted in the VACUTAP® VRD/VRF, size C/D documentation?
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Which part number is associated with the VACUTAP® VRG, size E model?
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Which part number identifies the tap selector bottom depiction of the VACUTAP® VRD/VRF, size C/D?
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The maximum rated through current for the VACUTAP® VRF III 1300 Y model is greater than that of the VRD III 1000 Y model.
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The rated peak withstand current for all models of VACUTAP® VRD/VRF/VRG III is the same at 30 kA.
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The rated duration of short-circuits for all the models listed is 5 seconds.
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The maximum rated step voltage for the VACUTAP® VRD III 1000 Y model is 4000 V.
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The step capacity (PStN) for the VACUTAP® VRF III 1300 Y model is 1500 kVA.
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The maximum rated through current for the VACUTAP® VRC I model is 700 A.
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All models of the VACUTAP® VRC I have a rated duration of short-circuits of 3 seconds.
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The rated peak withstand current for the VACUTAP® VRC I 1001 model is 12 kA.
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The step capacity for the VACUTAP® VRC I 1301 model is higher than that of the VRC I 701 model.
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An over-excitation of the transformer can allow the maximum rated step voltage to exceed its value by 10%.
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The VACUTAP VR® I HD series includes multiple coarse change-over selectors.
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On-load tap-changer models are unaffected by changes in technical data after publication.
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The section referring to parallel connections is outlined in section 3 of the document.
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Step capacity diagrams for electrical arc furnace operation are not included in the documentation.
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The insulation level for VACUTAP® models is discussed in section 1.3 of the document.
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The product information might be subject to intellectual property rights.
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The rated withstand voltages of internal insulation are covered in section 3.4.
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The maximum rated through current for the VACUTAP® VRC I HD model is stated in section 2.1.
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On-load tap-changers are designed only for delta connections.
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All operating instructions for VACUTAP® models were originally written in German.
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The insulation distance 'c2' refers to the area between diverter switch output terminal and ground.
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Tap selector size E has a maximum insulation withstand voltage of 670 kV.
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The rated withstand voltage for tap selector size D during 1.2/50 µs is only 20 kV.
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Insulation distances for tap selector size C and size D are the same for the maximum rated voltage of 1500 kV.
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The maximum insulation distances of the the tap selection options are all the same for both diverter switch output terminal and change-over selector contacts.
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'a' represents the insulation distance with a maximum of 670 kV in the fine tap selector contacts.
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The rating for 'b' is higher than that of 'c1' in terms of insulation distances.
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The document notes that there are available tap selectors for the basic connection diagrams 16 15 1 W and 18 17 1 W.
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The insulation distance labeled 'b' is between the fine tap selector contacts of different phases and the output terminal of one phase.
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Insulation distance 'a1' indicates the distance between selected and preselected taps on the diverter switch.
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The rated withstand voltage for insulation distances is specified for multiple conditions including 1.2/50 μs and 50 Hz.
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Insulation distance 'c2' is defined as the distance between connected coarse tappings of the same phase.
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The distance 'd2' refers to the space between connected and adjacent coarse tap contacts in one phase.
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The tap selector size 'C' is associated with the highest rated insulation distances at 1.2/50 µs.
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Insulation distance 'd3' encompasses the distance between any coarse tappings of a particular phase.
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The diverter switch output terminal distance 'f' measures insulation distance to ground but does not account for other phases.
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Study Notes
On-Load Tap-Changer Overview
- VACUTAP VR® series includes models I, II, III, and VR I HD, designed for transformer applications.
- On-load tap-changers adjust voltage levels in transformers without interrupting the power flow.
General Technical Data
- Designed for different applications with various models offering distinct specifications.
- Models like VRD, VRF, and VRG for three-phase operation, and VRC for single-phase.
- Maximum rated through currents range from 400 A to 1300 A across different models.
- Rated short-time currents range from 6 kA to 15 kA with a consistent duration of 3 seconds for circuit interruptions.
- Rated peak withstand currents vary from 15 kA to 37.5 kA depending on the model.
Step Capacity & Voltage Ratings
- Maximum rated step voltages for most models are 3300 V, with specific models rated for 4000 V.
- Step capacity (PStN) typically ranges from 1500 kVA to 3000 kVA.
Insulation & Design Features
- Insulation levels must adhere to specified standards to ensure operational safety.
- Models available with multiple coarse change-over selectors for enhanced operational flexibility.
- Admissible maximum operating voltage on individual tap selectors is half the rated withstand voltages.
Special Model Insights
- VACUTAP® VRC I HD series with variations from 401 to 1301 offer tailored solutions for specific power needs.
- Includes features such as potential switches and tie-in resistors for added functionality.
Diagrams & Capacity Details
- Step capacity diagrams illustrate operational limits for various models under different configurations, including electrical arc furnace applications.
- Detailed capacity diagrams inform users of the operational capabilities specific to each model variant.
Compliance & Legal Notices
- Document prohibits unauthorized reproduction and use. Liability for infringements is outlined.
- Original operating instructions are available in German, emphasizing the importance of accurate translation for operational guidance.
General Overview
- VACUTAP VR® I II III/VR® I HD are types of on-load tap-changers designed for electrical applications.
- Usage of these tap-changers ensures voltage stabilization in transformers, enhancing efficiency in power distribution.
On-Load Tap-Changer Designations
- Designations include VRC I, VRD I, VRF I, and VRG I, applicable for both single-phase and three-phase systems.
- Models are categorized based on maximum rated through current and application specifics.
Technical Data Summary
- Maximum rated through current varies from 400 A to 1300 A depending on the model.
- Rated short-time current ranges from 6 kA to 15 kA per model.
- Rated duration of short-circuits consistently set at 3 seconds across models.
- Rated peak withstand current increases from 15 kA to 37.5 kA as current capacity rises.
- Step capacity (PStN) for VRC I series is primarily 1500 kVA, while for VRD/VRF/VRG III it can be up to 3000 kVA.
Insulation Levels
- Rated insulation levels dictate design safety against electrical surges.
- Insulation distances measured in kV, with different tap selector sizes demonstrating varying maximums.
- Insulation for tap selectors ranges from a minimum of 20 kV to higher ratings depending on size and configuration.
Special Designs
- Features parallel bridges for enhancing connection robustness.
- Compatible with multiple coarse change-over selectors for increased operational versatility.
- VACUTAP® models support delta connections for complex electrical configurations.
Important Diagrams
- Step capacity diagrams illustrate operational limits and capabilities for various models under electrical arc furnace operations and standard conditions.
- Rated withstand voltages of internal insulation provide critical data for application boundaries and safety.
Summary of Critical Values
- VRC I models: Maximum rated through current from 400 A to 1300 A with a steady amp capacity of 3300 V.
- VRD III/VRF III/VRG III series support greater power demands with maximum current ratings extending up to 1300 A.
- Insulation distances calculated for operational safety in high-capacity environments.
Operational Notes
- Maximum rated step voltage can allow for a 10% excess due to specific transformer over-excitation scenarios.
- Understanding each model's specifications is essential for proper selection in industrial applications.
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Description
Explore the technical specifications and features of the VACUTAP VR® I II III and VR® I HD on-load tap-changer. This quiz will test your knowledge on the various aspects of these devices, their applications, and technical data. Perfect for those looking to deepen their understanding of modern electrical equipment.
