Questions and Answers
How many equally sized crates can be stacked on top of one another?
What is used to protect packaged goods from humidity during transportation?
What materials are used to ensure the packaged goods do not touch the loading surface during transportation?
What happens to the sealed packaging after adding the desiccant?
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What type of goods do the mandatory symbols apply to?
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What is required for the packaged goods to be considered undamaged during transportation?
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What must you do if the potential connection unit has a mounting bracket?
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Which component is crucial to prevent mechanical strain on the on-load tap-changer?
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Which of the following should be avoided to prevent damaging the on-load tap-changer?
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What is the primary function of the pressure-operated relay in the monitoring device?
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What is the recommended caution while fastening the potential connection unit?
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Which material is used for the housing and cover cap of the pressure monitoring device?
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What should be applied to the take-off ring during the fastening process?
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How many variants of the pressure monitoring device are available?
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Which parts are involved in connecting the tap winding and the on-load tap-changer take-off lead?
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What happens during diverter switch operations at rated switching capacity?
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What is the function of a spring washer in this mounting process?
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According to the applicable standards, which IEC publication is relevant to the pressure monitoring device?
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What is the appropriate action when establishing connections?
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What is the nature of gas accumulation under the pressure-operated relay?
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What is the primary purpose of the temperature monitoring system described?
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How does the bevel gear function in the context of the drive shaft?
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What components form the mechanical connection in the drive shaft design?
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In which parts of the system is the vertical drive shaft mounted?
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What is one of the key characteristics of the drive shaft structure?
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What aspect does the coupling design of the drive shaft affect?
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What describes the installation position of the horizontal drive shaft relative to the bevel gear?
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What ensures the connection between the drive shaft and the machine components?
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What is crucial to avoid when fastening tap-winding connecting leads?
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What should be used to prevent screw connections from becoming loose?
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Which of the following is NOT a requirement for connecting the tap winding?
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What is the standard orientation of the through-holes of the connection contacts?
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What is the purpose of using an expansion loop when connecting leads?
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What should be done after attaching the screening caps?
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What should be confirmed before starting the connection process?
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Which materials should be used for fastening tap-winding connecting leads?
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An electrically trained person works independently without guidance from a skilled person.
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The operating company is responsible for training operators on specific risks associated with improper handling.
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Personal protective equipment needs to be worn only if it is new and undamaged.
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Maintenance and repairs should be performed by any personnel, regardless of their training.
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Wearing personal protective equipment is optional based on the tasks being performed.
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Authorized personnel are specially trained by Maschinenfabrik Reinhausen GmbH for maintenance tasks.
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An operator may use the product without any prior training provided by the operating company.
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Damaged personal protective equipment is acceptable to wear as long as it still offers some protection.
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Pictograms in warning notices always indicate non-dangerous situations.
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Multi-step instructions are structured to show a sequence of various process steps.
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Single-step instructions consist of more than one process step.
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The aim of action is specified at the end of an instruction in the documentation.
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Warning of combustible substances is one of the defined pictograms in warning notices.
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Instructions in the technical file can be provided in a multi-layered format that includes optional results.
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The use of pictograms only applies to entities that produce electrical equipment.
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The structure of the instruction system includes an aim of action, which is critical for successful task completion.
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An on-load tap-changer is fitted to the primary winding of a transformer.
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The motor-drive unit changes the operating position of the on-load tap-changer based on control impulses.
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The oil compartment of the on-load tap-changer contains a built-in switch, diverter, and selector.
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The bevel gear is responsible for receiving the control impulses in the transformer system.
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The on-load tap-changer head is the least important component in the on-load tap-changer assembly.
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The vertical drive shaft is mounted in the horizontal positioning of the transformer setup.
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The transmission ratio of the transformer is adapted to match operational demands.
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The protective relay is a component found in the oil conservator of the transformer system.
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The potential connection unit must always be fastened to the oil compartment regardless of the presence of a mounting bracket.
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Twisting connection contacts is necessary to ensure secure connections without damage.
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The spring washer plays a role in maintaining tension in the screw connections during the mounting process.
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Mechanical strain on the on-load tap-changer is a critical factor to consider during the connection process.
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Connecting leads should be handled carelessly to reduce installation time.
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A nut is used to secure the potential connection unit to the take-off ring in the oil compartment.
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The screening cap is not relevant in the context of fastening the potential connection unit.
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The potential connection unit can be installed without prior confirmation of the connection process.
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Transporting a crate can be done safely while it is open to avoid damage.
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Only trained personnel are allowed to select the sling gear and secure the load during transport.
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Dropping a crate during transport is permissible if the crate is lightweight.
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Increased oscillation stress should be expected during the transportation of all crates.
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Securing the crate is unnecessary if it is on a pallet.
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Using a means of transport with insufficient carrying capacity is safe if the crate is not very heavy.
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What is the primary purpose of keeping the technical file and supporting documents accessible?
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Which document is NOT considered a supporting document for the technical file?
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Who is authorized to handle the technical file and its contents?
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What does the hazard communication system primarily focus on?
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What type of information can you expect in the installation and commissioning instructions?
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Why is it stated that the technical file is incomplete without supporting documents?
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What is one of the critical notation conventions used in this technical file?
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What type of information is likely found in the 'Connection diagrams' supporting document?
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What is a requirement when the maximum axial offset for the drive shaft exceeds 2°?
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Which component is not part of the drive shaft without a cardan joint?
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How long is the distance from the middle of the hand crank to the middle of the bevel gear in the standard configuration?
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Which component offers protection within the drive shaft assembly?
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What is the primary role of the coupling bracket in the drive shaft?
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In what situation is an intermediate bearing necessary within the drive shaft setup?
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What should be done if safety markings on the product are damaged or missing?
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Which of the following represents a potential risk when using auxiliary materials not approved by the manufacturer?
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To ensure the product operates safely, which condition must be strictly followed?
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What could unauthorized modifications to the product lead to?
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Which type of fluids should be used in the operation to maintain safe practices?
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In what scenario is it permissible to operate or maintain the product?
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What is the primary reason for maintaining the integrity of safety markings?
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What can be expected if non-approved conductive hoses are used?
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In what scenario is the use of the hand crank for the motor-drive unit permitted?
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What defines an emergency operation regarding the tap-change operation?
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What should be done if there is doubt about the condition of the motor-drive unit?
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Which option best describes the primary purpose of the hand crank during the motor-drive unit's usage?
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What is the recommended action if a fault is suspected in the motor-drive unit?
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What should be observed during an emergency operation of the tap-changer?
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When is it not necessary to operate the motor-drive unit with a hand crank?
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What must be ensured before using the hand crank for operating the motor-drive unit?
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What is the main purpose of pipe connection E2?
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Which of the following statements about pipe connection R is true?
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How can the on-load tap-changer be completely emptied?
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What function does the vent screw on pipe connection S serve?
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What is the location of pipe connection E2 in relation to the on-load tap-changer?
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What is indicated by the nameplate on the on-load tap-changer?
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Which component can be connected to pipe connection R?
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What is a secondary purpose of pipe connection E2?
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Using unsuitable insulating fluids can cause damage to the on-load tap-changer.
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The pressure-operated relay does not respond to gas accumulation under the pressure-operated relay.
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It is permissible to operate the on-load tap-changer without a pressure relief device if it does not have a flange.
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There is only one variant of the pressure monitoring device available for installation.
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The oil compartment of the on-load tap-changer should always be filled with used insulating fluid.
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Establishing a connecting lead between E2 and one of the pipe connections R, S, or Q helps ensure equal pressure in the oil compartment.
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The housing and cover cap of the pressure monitoring device are made from heavy metals.
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Personal protective equipment is required only if the operator feels it is necessary.
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Diverter switch operations at permitted overload cause the pressure-operated relay to trip.
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Multi-step instructions are designed to outline a single process step.
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The IEC publication that applies to the pressure monitoring device is IEC 60214-2.
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Gas accumulation under the pressure-operated relay is an abnormal occurrence.
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Inspecting the on-load tap-changer for a flange attachment is optional and does not affect operational safety.
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Training operators about specific risks associated with improper handling is solely the responsibility of the personnel involved.
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The signal word 'CAUTION' indicates a hazardous situation which, if not avoided, will result in death or serious injury.
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'NOTICE' is a signal word that indicates measures to be taken to prevent damage to property.
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Embedded warnings concern broader sections and apply to larger units of information.
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The warning 'DANGER' does not require immediate corrective action if a potentially hazardous situation is identified.
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Single-step instructions consist of one process step only.
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Pictograms in warning notices always represent dangerous situations.
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If the pressure monitoring device sensor is in the OFF position, the transformer can be started up under any circumstances.
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Before using the equipment again, it is essential to ensure there is no damage to the on-load tap-changer or transformer.
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The second step when a circuit breaker is tripped is to close the oil conservator stop valve immediately.
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If you cannot clarify why the pressure monitoring device tripped, it is recommended to contact Maschinenfabrik Reinhausen.
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The first step after a circuit breaker is tripped by the pressure monitoring device is to ensure the transformer is safe to operate.
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Insulating fluid leaks should be immediately addressed by checking the on-load tap-changer head cover.
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Blocking the motor-drive unit by tripping the motor protective switch is a precautionary step during troubleshooting.
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If the pressure monitoring device sensor is in the OPERATION position, it is advisable to directly start the transformer.
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The transformer must be energized during testing to ensure proper functionality.
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The automatic fire extinguishing device should be active during the testing of the transformer.
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To reset the pressure monitoring device, the sensor on the snap-action switch must be activated.
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The signaling contact for minimum fluid fill level is not connected to the circuit breaker’s tripping circuit.
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All protective devices must be non-functional before closing the transformer's circuit breaker.
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The oil compartment of the on-load tap-changer needs to be completely filled with insulation fluid.
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The transformer’s circuit breaker must be closed with isolating switches open and the transformer ungrounded.
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The passive protection test involves ensuring that the transformer’s circuit breaker cannot be closed.
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Study Notes
Pressure Monitoring Device Features
- Complies with IEC publication 60214-1 standards.
- Diverter switch operates within rated capacity without tripping the pressure-operated relay.
- Relay activation occurs due to pressure changes, not gas accumulation, which is a normal condition.
Versions of Pressure Monitoring Device
- Two installation variants:
- DW 2000 for vertical setup.
- DW 2000 for horizontal setup.
- Housing made from lightweight, corrosion-resistant metal.
Temperature Monitoring System
- Monitors the temperature of insulating fluid in the oil compartment of the on-load tap-changer.
Drive Shaft Functionality
- Acts as the mechanical link between the drive and on-load/de-energized tap-changer.
- Bevel gear direction is transformed from vertical to horizontal.
Drive Shaft Design
- Constructed from a square tube, connected with coupling brackets and bolts.
- Ensures secure connection to both driving and driven ends of the device.
Packaging and Transport
- Designed to protect contents during transport in compliance with local laws.
- Packaged in sturdy crates to prevent damage and maintain position during transportation.
- Sealed with plastic foil and contains desiccants for humidity protection.
Packaging Markings
- Packaging includes clear instructions for safe transport and storage.
- Adherence to designated non-hazardous symbols is mandatory.
Mounting Instructions
- Fastening of the potential connection unit to the oil compartment is required only if a mounting bracket is present.
- Careful connection to prevent mechanical strain on the on-load tap-changer is essential.
- Use expansion loops if needed to avoid twisting of connection contacts.
Selector Connection Contacts
- Fasten tap-winding connecting leads using cable shoes and M12 screws according to the provided connection diagram.
- Fit screening caps on connections to ensure they are fully covered.
- Use clamping washers to prevent screw connections from loosening.
- Connections must not exert mechanical loads on the selector.
Warning Notices
- Pictograms serve to indicate dangers, including:
- Danger points
- Dangerous electrical voltages
- Combustible substances
- Danger of tipping
- Danger of crushing
Information and Instruction Systems
- Information is structured to enhance understanding of procedures.
- Single-step instructions detail one process with:
- Aim of action
- Requirements (optional)
- Step 1 and relevant results (optional)
- Multi-step instructions encompass several actions, emphasizing the need for supervision by an electrically skilled person.
Safety Protocols
- Operators must follow the product's operational guidelines and receive instruction on handling risks.
- Maintenance should be conducted by trained personnel from the Technical Service department to ensure proper execution.
- Personal protective equipment (PPE) is essential to minimize health risks:
- Always wear appropriate PPE.
- Avoid using damaged PPE.
Product Overview
- The on-load tap-changer is integrated into transformers, adjusting transmission ratios based on operational needs.
- Main components of the system include:
- Transformer tank
- Motor-drive unit
- On-load tap-changer
- Protective relay
- Active part of the transformer
Transportation and Handling
- Strict warnings highlight dangers of tipping or falling loads during transport:
- Only transport when the crate is closed.
- Secure loads adequately and never walk under suspended loads.
- Use transport means with sufficient capacity for the weight specified.
- Avoid physical stress like jolting or collision during transport to prevent damage.
Mounting Instructions
- Fasten the potential connection unit to the oil compartment when applicable.
- Precise mounting techniques safeguard against mechanical strain that can damage the on-load tap-changer.
- Important steps for connection include:
- Careful establishment of connections without twisting contacts.
- Various hardware elements involved include screws, washers, and brackets.
Manufacturer Information
- Product manufactured by Maschinenfabrik Reinhausen GmbH, located at Falkensteinstraße 8, 93059 Regensburg.
- Contact information includes phone: (+49) 9 41/40 90-0 and email: [email protected].
- Further product information and technical files are available upon request.
Technical File Accessibility
- Technical file is intended for specially trained and authorized personnel only.
- Incomplete without supporting documents, which include:
- Unpacking instructions
- Supplement
- Routine test report
- Connection diagrams
- Dimensional drawings
- Order confirmation
- All documents should be kept readily accessible for future reference.
Safety Precautions
- Warnings in the technical file indicate critical safety information related to entire sections.
- Installation, operation, or maintenance in explosive environments is strictly prohibited.
- All safety markings and information plates must be observed, remain intact, and be legible; replacemen is required for any missing or damaged markers.
Operating Conditions
- Product should only operate under specified ambient conditions to ensure safety and reliability.
- Manufacturer-approved auxiliary materials and operating materials must be used to prevent injuries and malfunctions.
Modifications and Connections
- Unauthorized modifications can lead to personal injury, property damage, and operational faults.
- Pipe connection S features a vent screw and connects to a transformer tank drain valve, allowing complete emptying of the on-load tap-changer.
- Pipe connection R is for protective relay attachment and is interchangeable with pipe connection Q.
- Pipe connection E2 is sealed and equalizes pressure between the transformer tank and the on-load tap-changer.
Nameplate and Maintenance
- Nameplate contains the serial number and is located on the on-load tap-changer head cover.
- Drive shaft specifications include configurations and dimensions to ensure proper alignment and function.
Operation Guidelines
- Normal operation does not require using the hand crank unless for installation or testing purposes; use is permitted for maintenance if no faults are detected.
- Emergency operations are allowed when a tap-change is necessary despite a fault; adherence to warnings is crucial in such cases.
Warning Formats
- Warnings are categorized by type and emphasize potential dangers and required actions.
- Embedded warnings target specific segments of information, providing detailed hazard instructions.
- The format for embedded warnings includes a direct danger indication follow by prevention instructions.
Signal Words and Definitions
- DANGER: Signifies a life-threatening hazard without avoidance.
- WARNING: Indicates possible serious injury risk if not avoided.
- CAUTION: Reflects potential for minor injuries if precautions are not taken.
- NOTICE: Suggests actions to prevent property damage.
Pressure Monitoring Device
- Integral to the MR protection system, functioning requires adherence to IEC publication 60214-1 standards.
- Variants include DW 2000 for both vertical and horizontal installations.
- The device is made from lightweight, corrosion-resistant metal.
Safety Precautions
- Overloading the on-load tap-changer may result in serious injury or fatal outcomes.
- Operations must strictly follow the permitted conditions to avoid excessive pressure-related risks.
- Only manufacturer-approved insulating fluids should be employed to avoid damage to the system.
Commissioning Steps
- Ensure proper pressure equilibrium during evacuation by connecting specified pipe connections.
- Fill the on-load tap-changer with new insulating fluid while ensuring the transformer is de-energized.
- An automatic fire extinguishing system should be deactivated before testing.
Operational Checks
- Verify that the transformer's circuit breaker is safely opened before certain operations.
- Follow strict procedures for checking and resetting the pressure monitoring device.
- All necessary protective devices must function correctly before system re-engagement.
Trip Response Procedures
- Document the trip's timing and the on-load tap-changer’s operational status.
- Prevent remote actuation of the motor-drive unit to safeguard against unintended operation.
- Investigate pressure monitoring device signals and consult with the manufacturer if malfunctions occur, ensuring no activation of the transformer without resolution.
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Description
This quiz covers the essential features and designs of pressure monitoring devices, including compliance with IEC standards and different installation variants. It also discusses the functionality and construction of the drive shaft used in these devices. Test your knowledge on temperature monitoring systems and their components.
