Electrical Assembly Process Quiz

Questions and Answers

What is the dimension drawing code for the Protective relay RS 2001?

895 661

890 182

892 608 (correct)

895 660

Which of the following items is associated with the motor drive unit MA 7?

Motor drive unit MA 7/8 (correct)

Socket wrench for kerosene drainscrew

Bevel gear CD 6400

Protective relay RS 2001

Which code corresponds to the Bevel gear CD 6400 dimension drawing?

895 661

892 916 (correct)

892 608

890 180

What item is represented by the code 895 660?

Motor drive unit MA 7 Signup and view all the answers

Which dimension drawing indicates the Socket wrench for kerosene drainscrew?

890 182 Signup and view all the answers

Identify the item linked to dimension drawing code 895 661.

Motor drive unit MA 7/8 Signup and view all the answers

What should be done if the transformer is to be transported or stored without oil filling?

Drain the oil Signup and view all the answers

What precaution should be taken before returning a transformer to service after reconnecting?

Ensure the tap changer and transformer are undamaged Signup and view all the answers

How should the interior of the tap changer be protected during prolonged stand-by periods?

Through nitrogen-sealing Signup and view all the answers

What action should be taken in case of serious trouble with the tap changer or motor drive when repair cannot be done on site?

Connect the heater of the motor drive unit to power Signup and view all the answers

What can gas accumulating under the cover of the tap changer head cause?

Minor oil displacement Signup and view all the answers

Which of the following actions is NOT recommended before reconnecting the transformer?

Reconnect without prior checks Signup and view all the answers

What is the purpose of the by-pass tube installed between the connections E2 and Q?

To evacuate both oil compartments and the transformer simultaneously Signup and view all the answers

What should be done before removing the diverter switch during the oil filling process?

Close the kerosene drain plug Signup and view all the answers

What is the maximum torque setting for tightening the cover bolts M10 on the tap changer?

34 Nm Signup and view all the answers

During the drying process in the autoclave, what temperature should be maintained?

90°C Signup and view all the answers

What incorrect procedure should be avoided during the oil filling of the tap changer?

Leaving the drain plug open during filling Signup and view all the answers

What substance is admitted to heat the tap changer during the drying process?

Kerosene vapor Signup and view all the answers

Where should the protective relay RS 2001 be mounted relative to the tap changer head?

As near as possible in a horizontal position Signup and view all the answers

What must be done after drying in the autoclave and before inserting the diverter switch unit?

Close the drain plug Signup and view all the answers

Which shape is the flat side of the terminals for the coarse tap selector?

Vertical only Signup and view all the answers

What is necessary for connecting tap leads to the terminals of the tap selector size E?

Soldering connectors Signup and view all the answers

What is the procedure for disassembly when using the tap selector terminals?

Withdraw screening electrodes using handles Signup and view all the answers

What is the contact designation for fine tap selector terminals of tap selector bar 'K'?

Standardized terminal designation Signup and view all the answers

How many contacts per plane can the fine tap selector terminals accommodate?

Ranges from 10 to 18 contacts Signup and view all the answers

What type of screws are required to attach lead ends to the terminal?

Recess head screws M10 x 30 Signup and view all the answers

What tools are utilized for attaching lead ends to terminals after performing a soldered connection?

Ratched handle and screws Signup and view all the answers

What will be supplied on request for terminals marked K?

Screening caps Signup and view all the answers

What must be ensured about the rubber gasket during the installation process?

It should be placed in its proper position. Signup and view all the answers

Which tool is required to equally fasten the 24 screws M10?

Wrench size 17 Signup and view all the answers

What is the maximum torque for securing the 14 nuts M8?

14 Nm Signup and view all the answers

How should the tap leads be assembled for proper connection?

In a way that allows for connection without tension. Signup and view all the answers

Which of the following is NOT a suggested action regarding the O-rings?

They should be coated with heavy oil. Signup and view all the answers

What is the purpose of shaping lead ends into expansion loops?

To allow for connecting without tension. Signup and view all the answers

What must be checked for sufficient clearance in the assembly?

The movement of the change-over selector's parts. Signup and view all the answers

Which component's mounting position is critical for proper operation of the tap changer?

Supporting plate for the diverter switch. Signup and view all the answers

The contact designation for fine tap selector terminals of tap selector bar 'K' is the same as that for coarse tap selectors.

False Signup and view all the answers

Transformer manufacturers typically recommend that protective relays should not be mounted close to the tap changer head.

True Signup and view all the answers

The maximum torque setting for securing the cover bolts M10 on the tap changer is 30 Nm.

False Signup and view all the answers

The shape of lead ends into expansion loops is critical for preventing electrical shorts.

True Signup and view all the answers

Rubber gaskets are considered irrelevant during the installation process of transformers.

False Signup and view all the answers

To connect tap leads to the terminals of the tap selector size E, no specific tools are required.

False Signup and view all the answers

The tap selector terminals designated with code 893 829:4E are associated with tap selector size E.

False Signup and view all the answers

The tap selector can accommodate a maximum of 20 contacts per plane.

False Signup and view all the answers

Rubber gaskets are not critical during the installation of tap selector terminals.

False Signup and view all the answers

The variant with screening caps offers enhanced protection against electromagnetic interference.

True Signup and view all the answers

Terminal 'K' is specifically designated for fine tap selector connections.

False Signup and view all the answers

The maximum torque setting for tightening cover bolts M10 on the tap changer is 45 Nm.

True Signup and view all the answers

Lead ends should be shaped into expansion loops for improved electrical contact.

True Signup and view all the answers

When transporting or storing the transformer, oil filling is essential to prevent damage.

True Signup and view all the answers

The clearance between the tap changer head and the supporting flange should be between 10 to 30 mm.

False Signup and view all the answers

It is recommended to use 15 nuts M8 with a maximum torque of 14 Nm for securing the tap changer head.

False Signup and view all the answers

The bell-type transformer cover must be thoroughly cleaned before installation.

True Signup and view all the answers

Two adjusting bolts in the supporting flange of the diverter switch oil compartment help check the tap changer head's mounting position.

True Signup and view all the answers

Before mounting, no specific gasket is required for the mounting flange of the tap changer head.

False Signup and view all the answers

The tap changer must be elevated to the oil compartment for the bell-type transformer cover to be properly mounted.

False Signup and view all the answers

After lifting the tap changer using the leveling traverse, it is critical to ensure the studs slide easily through the fixing holes.

True Signup and view all the answers

Lifting the tap changer should be performed with a torque wrench size 16.

False Signup and view all the answers

Paper insulation is recommended for the installation of tap selector terminals.

True Signup and view all the answers

The tap selector size E allows for a connection of tap leads with dimensions of M12x50.

False Signup and view all the answers

The on-load tap changer type T has a specific manual for troubleshooting.

True Signup and view all the answers

A hex head screw is not included as part of the delivery for mounting the tap selector terminals.

False Signup and view all the answers

The tap selector terminal layout generally varies by manufacturer.

True Signup and view all the answers

A fine tap selector terminal must always be connected to the terminal marked as negative.

False Signup and view all the answers

The hex nut is a critical component provided for securing tap leads.

True Signup and view all the answers

Soldering connectors are used exclusively for large tap selector terminals.

False Signup and view all the answers

The tap selector terminals have a uniform size across all models.

False Signup and view all the answers

It is necessary to prepare the lead ends into expansion loops for efficient functioning of the tap selector.

True Signup and view all the answers

The tap changer head has a bleeder screw located at position 29b.

False Signup and view all the answers

A through-hole with a diameter of 15mm is used for the drive shaft of the position indicator.

True Signup and view all the answers

The suction pipe in the configuration is indicated as pipe connection P.

False Signup and view all the answers

The mounting flange on the transformer cover is associated with dimensions labeled T1001C/D.

True Signup and view all the answers

The terminal for the diverter switch oil compartment is identified by the number 36.

False Signup and view all the answers

The position indicator is located at the take-off terminal labeled T1502.

False Signup and view all the answers

The bottom of the oil compartment features a spacer marked with the number 32b.

True Signup and view all the answers

The thickness of the terminal cover is classified as 76mm.

True Signup and view all the answers

The tap changer takes a terminal with a specification of TIX 600 as neutral.

True Signup and view all the answers

The component referred to as 'grading ring' is marked with the designation R I N G I W150.

True Signup and view all the answers

Study Notes

Assembly Process

Attach clip to the shaft end and ensure the rubber gasket is properly positioned in the cover.
Reinstall the suction pipe and secure 24 M10 screws with a wrench size 17, applying a maximum torque of 34 Nm.

O-Rings and Diverter Switch

Grease O-rings lightly before installation.
Reinstall the diverter switch unit, ensuring the supporting plate is properly positioned and secured with 14 M8 nuts using a wrench size 13 and a max torque of 14 Nm.

Connection of Tap Winding Tap Changer

Connect tap winding to the tap changer following the provided wiring diagram, ensuring all connections are secure.
Tap leads must be assembled to avoid tension; expansion loops may be necessary for shaping lead ends.

Clearance Requirements

Proper placement of tap leads near the change-over selector is crucial for preventing blockages of moving parts.
Terminal configurations include vertical flat sides for certain connections and horizontal sides for others.

Soldering Connectors for Tap Selector T 1000

Tap leads for size E tap selector can only be connected via soldering connectors, screws, and nuts supplied with the equipment.
Soldering connectors are pre-attached but may require unscrewing and detaching before soldering.

Disassembly Instructions

Use provided handles to withdraw screening electrodes and unscrew the two recess head screws.
Remove self-locking nuts and soldering connectors to perform soldered connections.
Reattach lead ends securely with screws and nuts, ensuring a proper snap-in fit for screening electrodes.

Filling Processes and Maintenance

Fill the transformer and tap changer with oil under vacuum to ensure proper operation.
Close the kerosene drain plug after the drying process in an autoclave to maintain integrity.

Protective Relay RS 2001 Installation

Mount the protective relay as close as possible to the tap changer head in a horizontal position, with serial numbers matching for identification.
Follow specific Operating Instructions No. 59 for RS 2001 installation.

Safety and Operational Checks

Conduct checks to ensure no damage to the transformer and tap changer before reconnection after maintenance.
Gas accumulation under the tap changer head cover can lead to oil displacement, thus requiring proper monitoring before returning to service.

Long-Term Standby Procedures

For extended standby, apply nitrogen sealing to preserve the interior of the tap changer and protect against oil loss or degradation.
Connect the motor drive unit heater to power during prolonged inactivity for optimal maintenance.

Tap Changer Installation

Ensure the tap changer is positioned correctly to provide safe operation after mounting.
The bell-type transformer cover needs to be set onto the oil compartment before elevating the tap changer to its final position.
Clean sealing surfaces of the oil compartment and cover to ensure secure mounting.
Use an oil-resistant gasket when attaching the tap changer head to limit oil leakage.

Mounting Process

Maintain a clearance of 5 to 20 mm between the tap changer head and supporting flange for final leveling.
Verify alignment using adjusting bolts on the supporting flange, ensuring it meets assembly marks accurately.
Secure the tap changer head by threading nuts onto studs that aren't obstructed by the supporting plate.

Torque Specifications

Apply 17 M8 nuts, with a wrench size of 13 and a maximum torque of 14 Nm to ensure secure fittings.
Ensure all flange studs move freely through corresponding fixing holes during installation.

Indicators and Connections

After covering the tap changer, attach the position indication dial for operational clarity.
Use appropriate connections (e.g., terminal connections for fine tap selectors and change-over selectors) as required by the application.

Manufacturer Support

For additional support or issues with the tap changer, contact Maschinenfabrik Reinhausen GmbH for technical assistance.
Contact details include an address in Regensburg, Germany, along with relevant phone and fax numbers.

Technical Drawings and Specifications

Refer to drawings in the appendix (e.g., figure numbers provided) for detailed visual guidance during installation.
Note specifications regarding various tap change terminals and types for proper configuration based on transformer type.

Important Components

Identify and understand components such as the oil compartment, diverter switch, and tap changer head for effective installation and maintenance.
Regular check of sealing integrity is critical to prevent oil leakage and ensure the longevity of the equipment.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

Test your knowledge on the assembly process for electrical components, including installation techniques and torque specifications. The quiz covers essential steps for working with O-rings, diverter switches, and tap winding tap changers, ensuring proper installation and clearance requirements.