Fluid Dynamics Oil Filling Analysis

Questions and Answers

What does ΔV represent in the context of oil filling quantity?

Change in volume per operating cycle (correct)

Change in dimensions due to temperature

The minimum allowable volume

Variations in oil viscosity

What does the term 'change-over selector' refer to in the table?

A device that monitors oil temperature

A part that regulates pressure levels

A mechanism for altering the flow direction of oil (correct)

A component that changes the voltage output

Which of the following temperature ranges applies to the oil specifications?

–15 °C to +80 °C

–20 °C to +90 °C

–30 °C to +100 °C (correct)

0 °C to +50 °C

According to the notes, what does VDE 0111, part 1 specify?

The insulation ratings for equipment Signup and view all the answers

What must be adhered to when using the coarse tapping arrangement in the (-) position with impulse voltage?

Permissible withstand voltage 'a' Signup and view all the answers

In the context of the survey designs mentioned, which aspect is NOT incorporated in the analysis?

Type of switch mechanism Signup and view all the answers

What is the influence of the change-over selector position on the permissible voltages for delta connection tap-changers?

Permissible voltages vary depending on the position of both selectors Signup and view all the answers

What is the significance of the tap selector terminal contacts in the connection diagrams?

To ensure compliance with MR standards Signup and view all the answers

Which of the following describes the relationship of voltage between different phase contacts in the (-) position?

Voltage 'b' applies between tap selector contacts of different phases Signup and view all the answers

In what scenario is it critical to monitor the withstand voltage 'a'?

Between tap selector contacts at the end of a tapped winding Signup and view all the answers

What is one of the main purposes of observing the permissible withstand voltage 'a' in the coarse tapping arrangement?

To prevent electrical arcing and equipment damage Signup and view all the answers

Which of the following statements about the change-over selector and tap selector is true?

They have a direct correlation affecting permissible voltages Signup and view all the answers

Which installation drawing corresponds to the on-load tap-changer OILTAP® V 200?

893945 Signup and view all the answers

What is the identification number for the horizontal drive shaft?

893772 Signup and view all the answers

Which component features a bell-type tank?

On-load tap-changer head, bell-type tank Signup and view all the answers

Which company is responsible for the data and changes mentioned in the installation documents?

Reinhausen GmbH Signup and view all the answers

What is the purpose of the document number TD 82/03 EN?

Identification of printed documentation Signup and view all the answers

What is the correct phone number format provided in the contact information?

+49 941 40 90-0 Signup and view all the answers

What defines the voltage stress experiences in tap windings?

The positioning of the change-over selector contacts Signup and view all the answers

Which arrangement is specifically mentioned for the change-over selector's coarse tapping?

Between different phases in the (+) position Signup and view all the answers

What does c21 represent according to the coarse tap selector description?

Selector contacts of different phases Signup and view all the answers

What is characteristic of the tap-changers for delta connections?

Different permissible values apply for each phase Signup and view all the answers

What voltage levels are indicated in the installation drawings for the on-load tap-changer?

40 kV and 123 kV Signup and view all the answers

What does c22 indicate with the coarse tap selector in the (-) position?

Change-over contacts of different phases Signup and view all the answers

For which device types are the identification numbers given?

On-load tap-changer OILTAP® V III 200 Y and OILTAP® V I 350 Signup and view all the answers

What does the term c2 describe in the context of the coarse tap selector?

Connections between change-over selector contacts of different phases Signup and view all the answers

What is the primary focus of the provided dimension drawings?

Physical dimensions for installation Signup and view all the answers

What does c1 focus on regarding the connections?

Connections between selected change-over contacts and ground Signup and view all the answers

What is the maximum total operating voltage allowed for a tap-changer with 10 contacts?

13,500 V Signup and view all the answers

Which factor has the least influence on the actual contact life of an arcing tap-changer?

Type of insulation Signup and view all the answers

How many contacts are indicated to have a total rated step voltage limitation of 13,200 V?

12 contacts Signup and view all the answers

Under what condition is the rated step voltage considered constant across the entire setting range?

When the rated step voltage is constant Signup and view all the answers

Which of the following statements is true regarding the inspection regulations for tap-changers?

They must be strictly observed. Signup and view all the answers

What factor is explicitly mentioned as not applicable to constant current service?

Actual contact life estimations Signup and view all the answers

The permissible withstand voltage 'a' applies only to the connections of different phases in a coarse tapping arrangement.

False Signup and view all the answers

In the (-) position of the change-over selector, the voltage withstand between tap selector contacts of the same phase is crucial.

True Signup and view all the answers

The change-over selector position does not affect the permissible voltages for delta connection tap-changers.

False Signup and view all the answers

Impulse voltage testing is not necessary for the coarse tapping arrangement in the (+) position.

True Signup and view all the answers

The voltages between contacts of different phases must always adhere to the same standard as those within the same phase.

False Signup and view all the answers

The connections at the end of tapped windings belong to the same phase as the tap selector contact they relate to.

True Signup and view all the answers

B1 represents the withstand voltage from unselected contacts of different phases.

False Signup and view all the answers

F1 is the voltage between unselected tap selector contacts and ground.

False Signup and view all the answers

B2 indicates the voltage from the selected contact of one phase to the unselected contacts of the same phase.

False Signup and view all the answers

B3 defines the withstand voltage between selected contacts of different phases.

False Signup and view all the answers

The change-over selector does not influence the design of voltage withstand specifications.

False Signup and view all the answers

F indicates the withstand voltage to ground in designs without change-over selectors.

True Signup and view all the answers

The on-load tap-changer V III 200 Y has a maximum of 4 poles.

False Signup and view all the answers

Dimensional drawings and connection diagrams must remain unchanged regardless of the transformer specifications.

False Signup and view all the answers

The transformer manufacturer is responsible for the selection of the on-load tap-changer properties.

True Signup and view all the answers

The technical data provided can be used independently without any reference to the general section.

False Signup and view all the answers

The V III 350 D on-load tap-changer can only be applied at the neutral point of the winding.

False Signup and view all the answers

Drawings submitted during the bidding process are not binding.

False Signup and view all the answers

The number of poles for the V I 350 tap-changer configuration is 2.

False Signup and view all the answers

Connections involving leakage inductance are part of the important information referenced in the general section.

True Signup and view all the answers

The AC withstand voltage for 10 contacts at a 50 Hz frequency is 70 kV.

False Signup and view all the answers

The rated lightning impulse withstand voltage for Um = 123 kV is 620 kV.

True Signup and view all the answers

For the 14 contacts configuration, the 50 Hz AC withstand voltage is 70 kV.

False Signup and view all the answers

The highest rated withstand voltage for a 50 Hz frequency is for Um = 123 kV, and it is 180 kV.

False Signup and view all the answers

The impulse withstand voltage of 350 kV is associated with the Um of 76 kV.

True Signup and view all the answers

For Um = 40 kV, the 50 Hz AC withstand voltage is 90 kV.

False Signup and view all the answers

The rated withstand voltage for 12 contacts at a 50 Hz frequency is consistently 50 kV.

True Signup and view all the answers

Um = 123 kV, with 1.2/50 μs impulse, achieves a withstand voltage of 350 kV for all configurations.

False Signup and view all the answers

For the 50 Hz withstand voltage of Um = 76 kV, the value is 180 kV.

True Signup and view all the answers

The rated withstand voltage of 490 kV can be sustained by the Um = 76 kV configuration.

True Signup and view all the answers

The OILTAP® V can have a horizontal drive shaft in both standard and special design.

True Signup and view all the answers

The installation drawing number for the OILTAP® V 350 is 8939456E.

True Signup and view all the answers

Tie-in resistors for the OILTAP® V III 200 Y/D are attached to the bottom of the unit.

False Signup and view all the answers

All dimension drawings for OILTAP® V include details about a flange for pressure relief valves.

False Signup and view all the answers

The OILTAP® V models presented range between 40 to 123 and 40 to 76.

True Signup and view all the answers

The drawing number 8946793E represents a design without a flange for any purpose.

False Signup and view all the answers

OILTAP® V's overhead driving components are always positioned on the left side.

False Signup and view all the answers

The directory of additional drawings features the OILTAP® V 200 model details.

True Signup and view all the answers

The lifting device referenced in the OILTAP® V is only suitable for the V I 350 configuration.

False Signup and view all the answers

The drawing number 8937773E is associated with the OILTAP® V III 350 D model.

False Signup and view all the answers

Study Notes

General Information

The average volume of oil filling in various configurations is provided, measuring in dm³.
Temperature range for oil temperature is specified from -30 °C to +100 °C.

Technical Data

The rated step voltage is restricted based on dielectric strength of tap-changer contacts.
Total operating voltages for tap-changer configurations:
- 10 contacts: Total Ui = 13,500 V
- 12 contacts: Total Ui = 13,200 V
- 14 contacts: Total Ui = 13,000 V
Mean expected contact life of arcing tap-changer contacts depends on the relative load (Iu/Ium) but varies due to multiple influencing factors.

Dimensional and Connection Diagrams

Basic connection diagrams illustrate tap selector terminal contacts as per MR standards.
Dimension drawings are available upon request, reflecting precise configurations.

Voltage Stress and Insulation

Insulation properties must meet specific standards when stressed with impulse voltage.
Various permissible voltage limits (designated as 'a', 'b', 'c') apply depending on the configuration and phase connections.

OILTAP® Models

On-load tap-changer models include OILTAP® V III in various capacities (200 Y, 200 D, 350 Y, 350 D) with and without change-over selectors.
Specific installation drawings are available for different models and configurations.

Additional Notes

Data may differ from actual delivered devices; changes can occur without notice.

Technical Data Overview

Technical data intended for transformer designers and calculators; specific to on-load tap-changers.
Key to verify data with general section (TD 61) containing essential information on connections, inductance, and current division.
Dimensional drawings and connection diagrams not guaranteed to remain unchanged; drawings presented during bidding and ordering are definitive.

On-load Tap-changer Specifications

Models include:
- V III 200 Y
- V III 200 D
- V III 350 Y
- V III 350 D
- V I 350
Each model features 3 poles except V I 350, which has 1 pole; application varies with winding configurations.

Insulation Distances and Voltage Ratings

Rated insulation distances and withstand voltages detailed for various configurations and voltages:
- Um = 40 kV, 76 kV, 123 kV/76
Key voltage withstand ratings include:
- kV 1.2|50 µs ratings varying from 200 to 620 depending on configuration.
- kV 50 Hz 1 min ratings range between 70 and 180.

Contact Configurations

Different configurations of contacts affect voltage withstand:
- 10, 12, and 14 contacts each with specific rated withstand voltages.
- Current division and leakage considerations are critical based on mounts and specifications.

Summary of Voltage Ratings

Table outlines rated withstand voltages for insulation gaps:
- Example:
  - 230 kV for b1 contacts at Um = 40 kV.
  - 350 kV for various configurations at Um = 123 kV.

Change-over Selector Guidelines

Change-over selector impact on permissible voltages between contacts clarifies binding requirements.
Details include transition stress considerations for coarse and fine tap windings.

Design Notes

Product customization includes horizontal drive shafts, tie-in resistors, and pressure relief valve options.
Installation drawings provided for various models highlight the design flexibility intended for specific transformer configurations.

Additional Documentation

Comprehensive directory of additional drawings supports installation and application specifics for on-load tap-changers.
Emphasis on technical consistency and validation for reliability in utility applications and design integrations.

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Description

This quiz examines fluid dynamics related to oil filling quantities and volume changes in a diverter switch system. Participants will analyze various scenarios involving different volume changes represented in dm3. Prepare to understand the relationships between flow, volume, and system efficiencies.