Podcast Beta
Questions and Answers
What is the maximum rated through current Ium for the VRF I 2602 model?
Which rated peak withstand current (kA) corresponds to the VRE I 1001 model?
What is the rated short-time current (kA) for the VRG I 1601 model?
Which model has a maximum rated step voltage that can be exceeded by 10%?
Signup and view all the answers
What is the step capacity (PStN) in kVA for the VRF I 2602 model?
Signup and view all the answers
What is the maximum rated through current for the VRC II 552 model?
Signup and view all the answers
What is the rated peak withstand current for the VRF II 1302 model?
Signup and view all the answers
Which of the following models has the highest step capacity?
Signup and view all the answers
What is the rated duration of short-circuits for all models listed?
Signup and view all the answers
Which model has a maximum rated step voltage greater than the others?
Signup and view all the answers
What is the maximum rated step voltage for the VACUTAP® VRC III series?
Signup and view all the answers
Which VACUTAP® VRC/VRE III model has the highest rated peak withstand current?
Signup and view all the answers
What is the rated capacity (PStN) for the VACUTAP® VRC III 550 Y model?
Signup and view all the answers
How long is the rated duration of short-circuits for all VACUTAP® VRC/VRE III models?
Signup and view all the answers
What is the maximum rated current (Ium(in) A) for the VACUTAP® VRE III 700 Y model?
Signup and view all the answers
Which VACUTAP® model includes a tie-in resistor cylinder without potential switches?
Signup and view all the answers
Which tap selector size corresponds with the VACUTAP® VRD/VRF models listed under item 4.62?
Signup and view all the answers
What is the purpose of the bridges mentioned for VACUTAP® VRF and VRG models?
Signup and view all the answers
What component is specified for the arrangement of potential switches in the VACUTAP® VRD/VRF?
Signup and view all the answers
Which item number corresponds to the VACUTAP® VRD/VRF with the tie-in resistor cylinder described as size C/D?
Signup and view all the answers
Which of the following is NOT included in the item descriptions for VACUTAP® VR series components?
Signup and view all the answers
What is the primary difference highlighted between the VACUTAP® VRD/VRF and VRG models based on the item descriptions?
Signup and view all the answers
Identify the item number that references the VACUTAP® VRD/VRF model with a potential switch and tie-in resistor cylinder.
Signup and view all the answers
Which item indicates a VACUTAP® model connection that lacks both potential switches and tie-in resistors?
Signup and view all the answers
Among the VACUTAP® models listed, which one is tagged with the identifier number 899955?
Signup and view all the answers
What is the significance of the tap selector size 'E' in the VRG versions?
Signup and view all the answers
How are the rated withstand voltages for the internal insulation determined?
Signup and view all the answers
Which diagrams specifically relate to electrical arc furnace operations?
Signup and view all the answers
What information does the step capacity diagram provide?
Signup and view all the answers
Which of the following statements is accurate regarding the versions of tap-changers?
Signup and view all the answers
What does the term 'rated through current' refer to in the context of step capacity diagrams?
Signup and view all the answers
Which diagram is indicated to be relevant for both electrical arc furnace and ladle furnace operation?
Signup and view all the answers
In what context is it advised to contact MR for additional information?
Signup and view all the answers
What is primarily shown in the step capacity diagrams?
Signup and view all the answers
Which figure would provide information about the rated step voltages during electrical arc furnace operation?
Signup and view all the answers
The maximum rated through current Ium for the VRE I HD 701 model is 700 A.
Signup and view all the answers
All models listed have a rated duration of short-circuits equal to 5 seconds.
Signup and view all the answers
The step capacity for the VRD I HD 1301 model is 1500 kVA.
Signup and view all the answers
The rated peak withstand current for the VRG I HD 1001 model is more than 25 kA.
Signup and view all the answers
The maximum rated step voltage for the VRD I HD 1301 model is 4000 V.
Signup and view all the answers
The insulation distance labeled 'c2' refers to the spacing between identically-named, connected coarse tappings of different phases.
Signup and view all the answers
The insulation distance 'a1' is defined as the distance between fine tap selector contacts of different tap positions.
Signup and view all the answers
The insulation distance 'b' signifies the separation between fine tap selector contacts of different phases and the connected K contact of one phase with any points of the tapped winding of another phase.
Signup and view all the answers
The size D tap selector requires higher insulation distances compared to size B tap selector when considering 1.2/50 µs insulation levels.
Signup and view all the answers
Insulation distance 'd1' refers to the interval between connected and adjacent coarse tap contacts within multiple phases.
Signup and view all the answers
The insulation distance 'f' specifies the relationship between the diverter switch output terminal and any ground connection.
Signup and view all the answers
The definition for insulation distance 'c1' pertains only to the separation between fine tapping outputs and their diverter switch output terminals.
Signup and view all the answers
The fine tap selector is only attached to one side of the multiple coarse change-over selector.
Signup and view all the answers
The VACUTAP® VRD/VRF I WP model includes a potential switch and tie-in resistor cylinder.
Signup and view all the answers
The VACUTAP® VRC model is associated with item number 899973.
Signup and view all the answers
Item number 899941 refers to the VRD/VRF models' potential switch arrangement.
Signup and view all the answers
The VACUTAP® VRG model lacks any connection contacts.
Signup and view all the answers
Item number 899968 depicts the bottom of the tap selector for size C/D models.
Signup and view all the answers
The VACUTAP® VRF series allows connection to three-phase systems only.
Signup and view all the answers
The tap selector size E is exclusive to the VACUTAP® VRF model range.
Signup and view all the answers
The VACUTAP® VRD/VRF I HD WP model has the identifier number 899966.
Signup and view all the answers
Item number 899969 describes the tap selector size D for the VRD/VRF range.
Signup and view all the answers
The arrangement of potential switches for the VACUTAP® VRD/VRF models is referenced by item number 899950.
Signup and view all the answers
The tap selector size for VACUTAP® VRC models is represented by the letter 'B'.
Signup and view all the answers
The VACUTAP® VRD model has a maximum rated through current Ium of 2000 A.
Signup and view all the answers
The 'I' in the on-load tap-changer designations symbolizes a single phase.
Signup and view all the answers
Models VRF I and VRF II both fall under the same current rating of 550 A.
Signup and view all the answers
The maximum number of operating positions without change-over selector for VRF models is 12.
Signup and view all the answers
The designation 'P' in the tap-changer model indicates a potential switch with tie-in resistor.
Signup and view all the answers
VACUTAP® VRG model types do not include any two-phase configurations.
Signup and view all the answers
The highest voltage rating included in the VACUTAP® model series is 300 kV.
Signup and view all the answers
Maximally, the number of operating positions with a change-over selector for the models is 35.
Signup and view all the answers
The character 'R' in the designation indicates the use of a potential switch only.
Signup and view all the answers
The designation 'Y' in the model indicates its applicability for neutral point only.
Signup and view all the answers
The maximum number of mid-positions in a VACUTAP® model is 3.
Signup and view all the answers
VACUTAP® VRD's maximum rated through current Ium for three-phase configurations is 1300 A.
Signup and view all the answers
The 'C' tap selector size is designated for both the VRC and VRD series.
Signup and view all the answers
The VRF I series models have a tap selector size denoted as 'E'.
Signup and view all the answers
The maximum rated through current Ium for the VACUTAP® VRC I 1001 model is $1000 A$.
Signup and view all the answers
All models listed have a rated duration of short-circuits of $5 s$.
Signup and view all the answers
The rated peak withstand current for VRC I 1301 is $37.5 kA$.
Signup and view all the answers
A maximum rated step voltage of $3300 V$ is consistent across all VACUTAP® VRC/VRD I models.
Signup and view all the answers
The rated short-time current for VRC I 701 is $12 kA$.
Signup and view all the answers
Study Notes
VACUTAP® Tap-Changers Overview
- VACUTAP® series includes models like VRC, VRE, VRF, and VRG, tailored for specific electrical applications.
- Each model serves varying maximum rated through currents ranging from 400 A to 2600 A, designed for efficient operational capacity.
Technical Specifications
- VACUTAP® VRE/VRF/VRG I models have:
- Maximum rated through current: 700 A (VRE I) to 2600 A (VRF I)
- Rated short-time current: 10 kA to 26 kA
- Peak withstand current ranges up to 65 kA.
- VACUTAP® VRC/VRF/VRG II models demonstrate:
- Maximum rated current from 400 A to 1300 A.
- Rated short-time currents between 6 kA and 15 kA.
- VACUTAP® VRC/VRE III models operate with:
- Maximum rated through current of up to 700 A.
- Consistent rated short-time current capabilities of 6 kA to 10 kA.
Step Capacity
- Step capacity (PStN) varies across models, with significant values including:
- VRE series up to 6000 kVA.
- VRC/VRF/VRG II series offering step capacities from 1320 kVA to 3000 kVA.
- All models allow for a maximum rated step voltage (Vin) of 4000 V, with special considerations for transformer over-excitation.
Electrical Safety Features
- Rated peak withstand currents not only signify construction resilience but are also critical for short-circuit protection.
- Operation duration for short circuits across all variants is established at 3 seconds, safeguarding against prolonged exposure to electrical faults.
Application Diagrams and Use Cases
- Step capacity diagrams detail relationships between rated voltage and current, ensuring proper load handling in practical applications.
- Special diagrams illustrate step capacities during electrical arc furnace operations, showing adaptability to high-demand environments.
Summary of Key Features Across Series
- VRE I to VRF I series tailored for high-capacity needs with one-phase application.
- VRC II series designed for two-phase application, catering to different industrial demands.
- Advanced engineered variants such as VRG designed for specific tapp selector sizes, enhancing the flexibility of installation in existing infrastructures.
VACUTAP® Overview
- VACUTAP® product line includes various models such as VRC, VRE, VRD, VRF, and VRG designed for on-load tap-changing operations.
- Models are indicated with specific type designations reflecting the configurations and applications, e.g., VRF I 1301 Y – 245 / C– 10 19 1W R.
On-load Tap-Changer Designations
- First letter indicates the model: VRC (Vacutap) or VRD, VRF etc.
- Number of phases is represented as Roman numerals: I (1 phase), II (2 phases), III (3 phases).
- Rated current (Ium) varies by model, with maximum values ranging from 400 A to 2600 A.
- Step selector sizes are identified with letters B, C, D, and E, depending on the model's capacity.
Technical Specifications
- Rated short-time currents range from 6 kA to 15 kA, dependent on the specific model.
- The maximum rated voltage can reach up to 4000 V, illustrating the tap-changer’s operational capacity.
- The rated duration for short-circuits across models is consistent at 3 seconds.
- Step capacity (PStN) varies; powerful models can achieve capacities up to 3750 kVA.
Insulation Distances
- Insulation distances are critical for safe operation and are specified for various tap selector sizes: B, C, D.
- Insulation distances include metrics for transient surge (1.2/50 µs), power frequency (50 Hz), and standard 1-minute tests.
- Specific measurements of insulation distances ensure safe operation under voltage stress, preventing faults.
Additional Features
- The VACUTAP® VR I HD version is available for applications requiring a higher number of tap-change operations.
- Available options for tie-in measures include resistors and potential switches to ensure operational versatility.
- Tap selectors are designed to accommodate multiple coarse change-over selectors, enhancing functionality in complex systems.
Summary of Performance Capacities
- Different models provide maximum currents ranging from 400 A (VRC I 401) to 1300 A (VRE I HD 1301) ensuring scalability based on operational requirements.
- The design promotes safety and efficiency during regulated voltage control, crucial in electrical grid management.
Considerations for Use
- Models tailored for diverse applications must consider the rated current and switching arrangements essential for system compatibility.
- Higher capacities may necessitate comprehensive insulation assessments to uphold performance and safety standards.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz covers the specific functions and connections of the VACUTAP® VRC/VRE and VRD/VRF/VRG components. You will explore details about tie-in resistor cylinders, fine tap selectors, and their respective connections. Prepare to test your knowledge on these critical electrical components.
