Podcast
Questions and Answers
What materials compose the drive shaft in the described device?
What materials compose the drive shaft in the described device?
What is the primary purpose of the coupling bolt in the design of the drive shaft?
What is the primary purpose of the coupling bolt in the design of the drive shaft?
What should be implemented if the maximum axial offset exceeds the specified limit?
What should be implemented if the maximum axial offset exceeds the specified limit?
Which component is NOT part of the drive shaft assembly as outlined in the product description?
Which component is NOT part of the drive shaft assembly as outlined in the product description?
Signup and view all the answers
What is the configuration measurement between the middle of the hand crank and the middle of the bevel gear?
What is the configuration measurement between the middle of the hand crank and the middle of the bevel gear?
Signup and view all the answers
What kind of drive shaft version is described as 'standard'?
What kind of drive shaft version is described as 'standard'?
Signup and view all the answers
Which of the following components is responsible for protecting the drive shaft?
Which of the following components is responsible for protecting the drive shaft?
Signup and view all the answers
Which option best describes the function of a bevel gear in the drive shaft assembly?
Which option best describes the function of a bevel gear in the drive shaft assembly?
Signup and view all the answers
What should be done if there is uncertainty regarding the condition of the motor-drive unit?
What should be done if there is uncertainty regarding the condition of the motor-drive unit?
Signup and view all the answers
In what scenario is the use of the hand crank allowed during normal operation?
In what scenario is the use of the hand crank allowed during normal operation?
Signup and view all the answers
What defines an emergency operation regarding the tap-changer?
What defines an emergency operation regarding the tap-changer?
Signup and view all the answers
What is the main purpose of the hand crank in the motor-drive unit?
What is the main purpose of the hand crank in the motor-drive unit?
Signup and view all the answers
Under which condition should the motor-drive unit not be operated manually?
Under which condition should the motor-drive unit not be operated manually?
Signup and view all the answers
Which of the following actions is NOT recommended if a fault exists in the motor-drive unit?
Which of the following actions is NOT recommended if a fault exists in the motor-drive unit?
Signup and view all the answers
What precaution should be taken during emergency operation of the tap-changer?
What precaution should be taken during emergency operation of the tap-changer?
Signup and view all the answers
Why is it important to complete the previous tap-change operation correctly?
Why is it important to complete the previous tap-change operation correctly?
Signup and view all the answers
What is the primary function of pipe connection R?
What is the primary function of pipe connection R?
Signup and view all the answers
Which statement about pipe connection E2 is true?
Which statement about pipe connection E2 is true?
Signup and view all the answers
How does the protective relay function within the circuit?
How does the protective relay function within the circuit?
Signup and view all the answers
What is the purpose of pressure equalization in transformers?
What is the purpose of pressure equalization in transformers?
Signup and view all the answers
What is the role of the flap valve in the protective relay system?
What is the role of the flap valve in the protective relay system?
Signup and view all the answers
What feature is specifically mentioned as being on the on-load tap-changer head cover?
What feature is specifically mentioned as being on the on-load tap-changer head cover?
Signup and view all the answers
Why might connection E2 be utilized in a Buchholz relay system?
Why might connection E2 be utilized in a Buchholz relay system?
Signup and view all the answers
Which is a function of the protective relay mentioned?
Which is a function of the protective relay mentioned?
Signup and view all the answers
What must be done immediately before inserting the hand crank into the motor-drive unit?
What must be done immediately before inserting the hand crank into the motor-drive unit?
Signup and view all the answers
What happens when the hand crank is inserted into the motor-drive unit?
What happens when the hand crank is inserted into the motor-drive unit?
Signup and view all the answers
How many times must the pointer on the tap-change indicator completely circle before the operation is considered complete?
How many times must the pointer on the tap-change indicator completely circle before the operation is considered complete?
Signup and view all the answers
What is a critical warning to observe during the fault elimination section?
What is a critical warning to observe during the fault elimination section?
Signup and view all the answers
What should be done with the hand crank after completing the tap-change operation?
What should be done with the hand crank after completing the tap-change operation?
Signup and view all the answers
What is the first step you should take to begin a tap-change operation?
What is the first step you should take to begin a tap-change operation?
Signup and view all the answers
What area of the tap-change indicator should the pointer return to after completing the operation?
What area of the tap-change indicator should the pointer return to after completing the operation?
Signup and view all the answers
What is NOT included in the procedure for operating the motor-drive unit with the hand crank?
What is NOT included in the procedure for operating the motor-drive unit with the hand crank?
Signup and view all the answers
What is the first action to take if the flap valve is in the OFF position?
What is the first action to take if the flap valve is in the OFF position?
Signup and view all the answers
Which information is not required to be communicated to Maschinenfabrik Reinhausen after experiencing a trip?
Which information is not required to be communicated to Maschinenfabrik Reinhausen after experiencing a trip?
Signup and view all the answers
What should be checked before re-commissioning the transformer?
What should be checked before re-commissioning the transformer?
Signup and view all the answers
What can result from insufficient testing of the on-load tap-changer and transformer?
What can result from insufficient testing of the on-load tap-changer and transformer?
Signup and view all the answers
What immediate action should be avoided if the pressure monitoring device has been tripped?
What immediate action should be avoided if the pressure monitoring device has been tripped?
Signup and view all the answers
Which condition is relevant to report regarding switching operations at the moment of tripping?
Which condition is relevant to report regarding switching operations at the moment of tripping?
Signup and view all the answers
Which question is not relevant to gathering information after a trip?
Which question is not relevant to gathering information after a trip?
Signup and view all the answers
What is the recommended first step when re-commissioning after identifying the cause of tripping?
What is the recommended first step when re-commissioning after identifying the cause of tripping?
Signup and view all the answers
Wearing loose clothing can increase the danger of becoming trapped in rotating parts.
Wearing loose clothing can increase the danger of becoming trapped in rotating parts.
Signup and view all the answers
It is safe to wear damaged personal protective equipment if it still offers some protection.
It is safe to wear damaged personal protective equipment if it still offers some protection.
Signup and view all the answers
A well-lit work area does not significantly impact safety during operations.
A well-lit work area does not significantly impact safety during operations.
Signup and view all the answers
Regularly checking the operational reliability of safety equipment is essential for safe operation.
Regularly checking the operational reliability of safety equipment is essential for safe operation.
Signup and view all the answers
It is recommended to keep the work area untidy to enhance workflow.
It is recommended to keep the work area untidy to enhance workflow.
Signup and view all the answers
Jewelry such as rings and necklaces can pose a danger when operating machinery.
Jewelry such as rings and necklaces can pose a danger when operating machinery.
Signup and view all the answers
Long hair should always be worn loose while operating equipment to avoid overheating.
Long hair should always be worn loose while operating equipment to avoid overheating.
Signup and view all the answers
Compliance with maintenance intervals is optional for safe equipment operation.
Compliance with maintenance intervals is optional for safe equipment operation.
Signup and view all the answers
Pipe connection R serves as a conduit for the on-load tap-changer oil conservator.
Pipe connection R serves as a conduit for the on-load tap-changer oil conservator.
Signup and view all the answers
The nameplate with the serial number is located on the oil tank of the transformer.
The nameplate with the serial number is located on the oil tank of the transformer.
Signup and view all the answers
Pipe connection E2 is designed to facilitate pressure equalization in the transformer.
Pipe connection E2 is designed to facilitate pressure equalization in the transformer.
Signup and view all the answers
The protective relay is triggered when the flow rate from the oil conservator to the on-load tap-changer exceeds a predetermined limit.
The protective relay is triggered when the flow rate from the oil conservator to the on-load tap-changer exceeds a predetermined limit.
Signup and view all the answers
A flap valve is a component involved in the operation of the protective relay.
A flap valve is a component involved in the operation of the protective relay.
Signup and view all the answers
Pipe connection E2 cannot be connected to a collective pipe for the Buchholz relay under any circumstances.
Pipe connection E2 cannot be connected to a collective pipe for the Buchholz relay under any circumstances.
Signup and view all the answers
The function of the protective relay includes preventing the transformer from overheating.
The function of the protective relay includes preventing the transformer from overheating.
Signup and view all the answers
The pressure inside the transformer tank and the oil compartment must be equalized during transportation.
The pressure inside the transformer tank and the oil compartment must be equalized during transportation.
Signup and view all the answers
The built-in hand crank interlock switch interrupts the control circuit while allowing the motor circuit to remain active.
The built-in hand crank interlock switch interrupts the control circuit while allowing the motor circuit to remain active.
Signup and view all the answers
After completing the tap-change operation, the pointer should return to the mid-position of the area marked in gray on the tap-change indicator.
After completing the tap-change operation, the pointer should return to the mid-position of the area marked in gray on the tap-change indicator.
Signup and view all the answers
Before inserting the hand crank, it is necessary to switch on the motor protective switch Q1.
Before inserting the hand crank, it is necessary to switch on the motor protective switch Q1.
Signup and view all the answers
The operation of the motor-drive unit can be conducted with the door of the protective housing kept closed.
The operation of the motor-drive unit can be conducted with the door of the protective housing kept closed.
Signup and view all the answers
If there are ignition sources present during operation, there is no risk of explosion.
If there are ignition sources present during operation, there is no risk of explosion.
Signup and view all the answers
To ensure safe operation, the hand crank should be returned to the mounting bracket after use.
To ensure safe operation, the hand crank should be returned to the mounting bracket after use.
Signup and view all the answers
The pointer on the tap-change indicator must circle twice to complete the tap-change operation.
The pointer on the tap-change indicator must circle twice to complete the tap-change operation.
Signup and view all the answers
The first step to carry out a tap-change operation is to insert the hand crank into the motor-drive unit.
The first step to carry out a tap-change operation is to insert the hand crank into the motor-drive unit.
Signup and view all the answers
The pressure monitoring device activates the sensor on the snap-action switch when there is a decrease in pressure in the oil compartment.
The pressure monitoring device activates the sensor on the snap-action switch when there is a decrease in pressure in the oil compartment.
Signup and view all the answers
The protective relay is required for the operation of the pressure monitoring device.
The protective relay is required for the operation of the pressure monitoring device.
Signup and view all the answers
The pressure monitoring device can be manually reset after it has tripped.
The pressure monitoring device can be manually reset after it has tripped.
Signup and view all the answers
Low-energy interference can trip the pressure monitoring device if the required tripping pressure is not met.
Low-energy interference can trip the pressure monitoring device if the required tripping pressure is not met.
Signup and view all the answers
The tripping pressure of the pressure monitoring device is adjustable after installation.
The tripping pressure of the pressure monitoring device is adjustable after installation.
Signup and view all the answers
A corrugated tube in the pressure monitoring device functions as a barometer and has no mechanical connection to the snap-action switch.
A corrugated tube in the pressure monitoring device functions as a barometer and has no mechanical connection to the snap-action switch.
Signup and view all the answers
The pressure monitoring device responds more slowly to pressure increases than the protective relay.
The pressure monitoring device responds more slowly to pressure increases than the protective relay.
Signup and view all the answers
The features of the pressure monitoring device do not comply with any specific standards.
The features of the pressure monitoring device do not comply with any specific standards.
Signup and view all the answers
All stop-cocks must be closed before switching on the transformer.
All stop-cocks must be closed before switching on the transformer.
Signup and view all the answers
Inrush current impulses are usually lower than the transformer rated current.
Inrush current impulses are usually lower than the transformer rated current.
Signup and view all the answers
The hand crank can be used to complete an electrical tap-change operation that has not ended completely.
The hand crank can be used to complete an electrical tap-change operation that has not ended completely.
Signup and view all the answers
It is safe to operate the motor-drive unit with the hand crank if the transformer is disconnected.
It is safe to operate the motor-drive unit with the hand crank if the transformer is disconnected.
Signup and view all the answers
Reversing the direction of rotation when using the hand crank is an acceptable practice.
Reversing the direction of rotation when using the hand crank is an acceptable practice.
Signup and view all the answers
Danger of explosion exists if the hand crank is operated without checking for transformer faults.
Danger of explosion exists if the hand crank is operated without checking for transformer faults.
Signup and view all the answers
A difficult-to-move hand crank should be ignored during operation.
A difficult-to-move hand crank should be ignored during operation.
Signup and view all the answers
Only tap-change operations during no load conditions should be performed once the inrush current impulse has subsided.
Only tap-change operations during no load conditions should be performed once the inrush current impulse has subsided.
Signup and view all the answers
Study Notes
Pipe Connection R
- Used for attaching the protective relay and connecting the oil conservator of the on-load tap-changer.
- Interchangeable with Pipe Connection Q.
Pipe Connection E2
- Sealed with a blank cover, leading into the transformer’s oil tank.
- Positioned under the on-load tap-changer head, it can also connect to a collective pipe for the Buchholz relay.
- Equalizes pressure between the transformer tank and the oil compartment, essential for drying, filling, and transportation.
Protective Devices
- The on-load tap-changer includes protective devices, one being the protective relay.
Protective Relay
- Integrated into the circuit breaker tripping circuit.
- Activates when the flow speed from the tap-changer head to the oil conservator surpasses a specified limit, indicating a fault.
- Triggers a flap valve that switches to the OFF position.
Drive Shaft Design
- Composed of a square tube with coupling brackets and bolts connecting it to other device components.
- Standard configuration involves no cardan joint or insulator.
Normal Operation
- Typically, the hand crank is not needed during normal operation.
- Hand crank usage is primarily for installation and testing, and can be used manually if the transformer is de-energized.
- Emergency operations can occur when tap-change is essential despite faults in the motor-drive unit.
Operating the Motor-Drive Unit Manually
- Open the protective housing and switch off the motor protective switch Q1.
- Insert the hand crank into the designated aperture and ensure the motor circuit is interrupted.
- Turn the hand crank until the tap-change pointer completes a full cycle and returns to mid-position.
- After completion, remove the hand crank, re-enable the motor protective switch, and close the housing.
Fault Elimination
- Safety Warning: Risks of explosion from volatile gases under the on-load tap-changer head cover.
- Ensure no ignition sources are present before addressing issues related to the tap-changer.
- If the flap valve is in the OFF position, do not start the transformer until reporting it to Maschinenfabrik Reinhausen.
- Provide detailed information about the conditions leading to tripping when contacting support.
Transformer Re-commissioning
- After resolving the reasons for protective relay tripping, check the relay and proceed to commission the transformer.
Safety Precautions
- Hazard of severe injury if the on-load tap-changer and transformer are not adequately tested post-pressure monitoring device tripping.
- Reaching out to Maschinenfabrik Reinhausen for checks and maintenance is crucial.
Fundamental Safety Instructions
- Responsibility for transport, installation, operation, maintenance, and disposal of products lies with designated individuals to prevent accidents and environmental harm.
Personal Protective Equipment
- Wear appropriate personal protective equipment (PPE) including helmets and gloves during activities.
- Avoid loose or unsuitable clothing to prevent entanglement in rotating parts.
- Jewelry such as rings and necklaces should not be worn; long hair must be secured with a hairnet.
- Inspect PPE regularly for any damage and replace if necessary.
Work Area Safety
- Maintain a clean and well-lit work area to reduce accident risks.
- Observe local regulations for accident prevention.
Operational Conditions
- Only operate equipment that is in sound, operational condition to ensure safety.
- Conduct regular checks on safety equipment and follow prescribed maintenance intervals.
Pipe Connections
- Pipe connection R is designed for connecting a protective relay and is interchangeable with pipe connection Q.
- Pipe connection E2 leads into the oil tank and can connect to a collective pipe for Buchholz relay, aiding in pressure equalization for various processes.
Equipment Identification
- The on-load tap-changer head includes a nameplate that displays the serial number for identification.
Protective Devices
- The protective relay interrupts the circuit breaker if flow rates exceed safe limits, helping prevent damage.
- Dynamic and static pressure monitoring devices are crucial for operational safety, triggering circuit breakers during unsafe pressure conditions.
Monitoring Device Functionality
- Functions via a corrugated tube mechanism, responding to pressure increases and requiring manual reset after activation.
- Tripping pressure is factory-set; low-energy disturbances won’t cause unnecessary trips.
Inrush Current Awareness
- Inrush current impulses can exceed rated current significantly; manage operations carefully post-impulse to avoid overloads during tap-change operations.
Operating Hand Crank
- Avoid unauthorized or unsafe use of the hand crank to prevent serious injury or death.
- Only operate the motor-drive unit after ensuring the transformer is disconnected.
- If resistance is felt when operating the hand crank, cease use immediately.
Proper Procedure for Tap-Change Operation
- Open the protective housing, switch off the motor protective switch, and insert the hand crank to begin tap-change operation.
- Turn the hand crank until the indicator returns to the mid-position before removing the crank and securing the protective housing.
Fault Elimination
- Explosive gases can accumulate under the tap-changer head cover; ensure no sources of ignition are present to prevent explosions.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz covers the specifications and uses of Pipe Connection R, focusing on its role in connecting protective relays and on-load tap-changer oil conservators. Understand the interchangeability with Pipe Connection Q and its applications in machinery. Enhance your knowledge of industrial piping standards.
