Pressure Monitoring Device Features and Design
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Questions and Answers

How many equally sized crates can be stacked on top of one another?

  • Two (correct)
  • One
  • Four
  • Three
  • What is used to protect packaged goods from humidity during transportation?

  • A desiccant (correct)
  • Cardboard lining
  • Foam padding
  • Bubble wrap
  • What materials are used to ensure the packaged goods do not touch the loading surface during transportation?

  • Metal supports
  • Sturdy crates (correct)
  • Plastic foil
  • Wooden pallets
  • What happens to the sealed packaging after adding the desiccant?

    <p>It is bonded.</p> Signup and view all the answers

    What type of goods do the mandatory symbols apply to?

    <p>Non-hazardous goods</p> Signup and view all the answers

    What is required for the packaged goods to be considered undamaged during transportation?

    <p>They must be in compliance with local laws.</p> Signup and view all the answers

    What must you do if the potential connection unit has a mounting bracket?

    <p>Fasten it to the oil compartment.</p> Signup and view all the answers

    Which component is crucial to prevent mechanical strain on the on-load tap-changer?

    <p>Tap winding connections</p> Signup and view all the answers

    Which of the following should be avoided to prevent damaging the on-load tap-changer?

    <p>Twisting the connection contacts</p> Signup and view all the answers

    What is the primary function of the pressure-operated relay in the monitoring device?

    <p>To respond to pressure changes.</p> Signup and view all the answers

    What is the recommended caution while fastening the potential connection unit?

    <p>Ensure connections are tightly secured.</p> Signup and view all the answers

    Which material is used for the housing and cover cap of the pressure monitoring device?

    <p>Lightweight, corrosion-resistant metal</p> Signup and view all the answers

    What should be applied to the take-off ring during the fastening process?

    <p>A washer and nut assembly</p> Signup and view all the answers

    How many variants of the pressure monitoring device are available?

    <p>Two variants: vertical and horizontal installations</p> Signup and view all the answers

    Which parts are involved in connecting the tap winding and the on-load tap-changer take-off lead?

    <p>Leading wires and insulating caps</p> Signup and view all the answers

    What happens during diverter switch operations at rated switching capacity?

    <p>The relay does not trip due to pressure changes.</p> Signup and view all the answers

    What is the function of a spring washer in this mounting process?

    <p>To absorb vibrations and allow for more secure fastening</p> Signup and view all the answers

    According to the applicable standards, which IEC publication is relevant to the pressure monitoring device?

    <p>IEC 60214-1</p> Signup and view all the answers

    What is the appropriate action when establishing connections?

    <p>Carefully establish connections without twisting.</p> Signup and view all the answers

    What is the nature of gas accumulation under the pressure-operated relay?

    <p>It is a normal occurrence.</p> Signup and view all the answers

    What is the primary purpose of the temperature monitoring system described?

    <p>To monitor the temperature of the insulating fluid.</p> Signup and view all the answers

    How does the bevel gear function in the context of the drive shaft?

    <p>It changes the direction of the drive shaft from vertical to horizontal.</p> Signup and view all the answers

    What components form the mechanical connection in the drive shaft design?

    <p>A square tube with two coupling brackets and a coupling bolt.</p> Signup and view all the answers

    In which parts of the system is the vertical drive shaft mounted?

    <p>Between the drive and the bevel gear.</p> Signup and view all the answers

    What is one of the key characteristics of the drive shaft structure?

    <p>It is composed of a hollow square tube.</p> Signup and view all the answers

    What aspect does the coupling design of the drive shaft affect?

    <p>The alignment and connection of the drive shaft.</p> Signup and view all the answers

    What describes the installation position of the horizontal drive shaft relative to the bevel gear?

    <p>It is mounted directly adjacent to the bevel gear.</p> Signup and view all the answers

    What ensures the connection between the drive shaft and the machine components?

    <p>Coupling brackets and coupling bolts.</p> Signup and view all the answers

    What is crucial to avoid when fastening tap-winding connecting leads?

    <p>Exerting mechanical loads on the selector</p> Signup and view all the answers

    What should be used to prevent screw connections from becoming loose?

    <p>Clamping washers and adequate design measures</p> Signup and view all the answers

    Which of the following is NOT a requirement for connecting the tap winding?

    <p>Using included cable shoes</p> Signup and view all the answers

    What is the standard orientation of the through-holes of the connection contacts?

    <p>Horizontal</p> Signup and view all the answers

    What is the purpose of using an expansion loop when connecting leads?

    <p>To allow for thermal expansion</p> Signup and view all the answers

    What should be done after attaching the screening caps?

    <p>Ensure they are fully seated and cover the screw head and nut</p> Signup and view all the answers

    What should be confirmed before starting the connection process?

    <p>The connection diagram is present and correct</p> Signup and view all the answers

    Which materials should be used for fastening tap-winding connecting leads?

    <p>M12 screws and cable shoes</p> Signup and view all the answers

    An electrically trained person works independently without guidance from a skilled person.

    <p>False</p> Signup and view all the answers

    The operating company is responsible for training operators on specific risks associated with improper handling.

    <p>True</p> Signup and view all the answers

    Personal protective equipment needs to be worn only if it is new and undamaged.

    <p>False</p> Signup and view all the answers

    Maintenance and repairs should be performed by any personnel, regardless of their training.

    <p>False</p> Signup and view all the answers

    Wearing personal protective equipment is optional based on the tasks being performed.

    <p>False</p> Signup and view all the answers

    Authorized personnel are specially trained by Maschinenfabrik Reinhausen GmbH for maintenance tasks.

    <p>True</p> Signup and view all the answers

    An operator may use the product without any prior training provided by the operating company.

    <p>False</p> Signup and view all the answers

    Damaged personal protective equipment is acceptable to wear as long as it still offers some protection.

    <p>False</p> Signup and view all the answers

    Pictograms in warning notices always indicate non-dangerous situations.

    <p>False</p> Signup and view all the answers

    Multi-step instructions are structured to show a sequence of various process steps.

    <p>True</p> Signup and view all the answers

    Single-step instructions consist of more than one process step.

    <p>False</p> Signup and view all the answers

    The aim of action is specified at the end of an instruction in the documentation.

    <p>False</p> Signup and view all the answers

    Warning of combustible substances is one of the defined pictograms in warning notices.

    <p>True</p> Signup and view all the answers

    Instructions in the technical file can be provided in a multi-layered format that includes optional results.

    <p>True</p> Signup and view all the answers

    The use of pictograms only applies to entities that produce electrical equipment.

    <p>False</p> Signup and view all the answers

    The structure of the instruction system includes an aim of action, which is critical for successful task completion.

    <p>True</p> Signup and view all the answers

    An on-load tap-changer is fitted to the primary winding of a transformer.

    <p>False</p> Signup and view all the answers

    The motor-drive unit changes the operating position of the on-load tap-changer based on control impulses.

    <p>True</p> Signup and view all the answers

    The oil compartment of the on-load tap-changer contains a built-in switch, diverter, and selector.

    <p>True</p> Signup and view all the answers

    The bevel gear is responsible for receiving the control impulses in the transformer system.

    <p>False</p> Signup and view all the answers

    The on-load tap-changer head is the least important component in the on-load tap-changer assembly.

    <p>False</p> Signup and view all the answers

    The vertical drive shaft is mounted in the horizontal positioning of the transformer setup.

    <p>False</p> Signup and view all the answers

    The transmission ratio of the transformer is adapted to match operational demands.

    <p>True</p> Signup and view all the answers

    The protective relay is a component found in the oil conservator of the transformer system.

    <p>False</p> Signup and view all the answers

    The potential connection unit must always be fastened to the oil compartment regardless of the presence of a mounting bracket.

    <p>False</p> Signup and view all the answers

    Twisting connection contacts is necessary to ensure secure connections without damage.

    <p>False</p> Signup and view all the answers

    The spring washer plays a role in maintaining tension in the screw connections during the mounting process.

    <p>True</p> Signup and view all the answers

    Mechanical strain on the on-load tap-changer is a critical factor to consider during the connection process.

    <p>True</p> Signup and view all the answers

    Connecting leads should be handled carelessly to reduce installation time.

    <p>False</p> Signup and view all the answers

    A nut is used to secure the potential connection unit to the take-off ring in the oil compartment.

    <p>True</p> Signup and view all the answers

    The screening cap is not relevant in the context of fastening the potential connection unit.

    <p>False</p> Signup and view all the answers

    The potential connection unit can be installed without prior confirmation of the connection process.

    <p>False</p> Signup and view all the answers

    Transporting a crate can be done safely while it is open to avoid damage.

    <p>False</p> Signup and view all the answers

    Only trained personnel are allowed to select the sling gear and secure the load during transport.

    <p>True</p> Signup and view all the answers

    Dropping a crate during transport is permissible if the crate is lightweight.

    <p>False</p> Signup and view all the answers

    Increased oscillation stress should be expected during the transportation of all crates.

    <p>True</p> Signup and view all the answers

    Securing the crate is unnecessary if it is on a pallet.

    <p>False</p> Signup and view all the answers

    Using a means of transport with insufficient carrying capacity is safe if the crate is not very heavy.

    <p>False</p> Signup and view all the answers

    What is the primary purpose of keeping the technical file and supporting documents accessible?

    <p>For future reference and safety guidelines</p> Signup and view all the answers

    Which document is NOT considered a supporting document for the technical file?

    <p>Operational handbook</p> Signup and view all the answers

    Who is authorized to handle the technical file and its contents?

    <p>Specifically trained and authorized personnel</p> Signup and view all the answers

    What does the hazard communication system primarily focus on?

    <p>Indicating potential hazards and safety instructions</p> Signup and view all the answers

    What type of information can you expect in the installation and commissioning instructions?

    <p>Step-by-step installation procedures</p> Signup and view all the answers

    Why is it stated that the technical file is incomplete without supporting documents?

    <p>Full understanding of the product cannot be achieved</p> Signup and view all the answers

    What is one of the critical notation conventions used in this technical file?

    <p>Warnings displayed prominently for visibility</p> Signup and view all the answers

    What type of information is likely found in the 'Connection diagrams' supporting document?

    <p>Visual representation of electrical connections</p> Signup and view all the answers

    What is a requirement when the maximum axial offset for the drive shaft exceeds 2°?

    <p>Implement an intermediate bearing</p> Signup and view all the answers

    Which component is not part of the drive shaft without a cardan joint?

    <p>Cardan joint</p> Signup and view all the answers

    How long is the distance from the middle of the hand crank to the middle of the bevel gear in the standard configuration?

    <p>536 mm</p> Signup and view all the answers

    Which component offers protection within the drive shaft assembly?

    <p>Protective cover</p> Signup and view all the answers

    What is the primary role of the coupling bracket in the drive shaft?

    <p>To stabilize the overall structure</p> Signup and view all the answers

    In what situation is an intermediate bearing necessary within the drive shaft setup?

    <p>When the maximum distance of 2472 mm is surpassed</p> Signup and view all the answers

    What should be done if safety markings on the product are damaged or missing?

    <p>Replace the safety markings as soon as possible.</p> Signup and view all the answers

    Which of the following represents a potential risk when using auxiliary materials not approved by the manufacturer?

    <p>Personal injury and property damage.</p> Signup and view all the answers

    To ensure the product operates safely, which condition must be strictly followed?

    <p>Adhering to the specified ambient conditions.</p> Signup and view all the answers

    What could unauthorized modifications to the product lead to?

    <p>Operational faults and personal injuries.</p> Signup and view all the answers

    Which type of fluids should be used in the operation to maintain safe practices?

    <p>Insulating fluids approved by the manufacturer.</p> Signup and view all the answers

    In what scenario is it permissible to operate or maintain the product?

    <p>Only in environments explicitly stated as safe by the manufacturer.</p> Signup and view all the answers

    What is the primary reason for maintaining the integrity of safety markings?

    <p>They provide essential safety information.</p> Signup and view all the answers

    What can be expected if non-approved conductive hoses are used?

    <p>They may lead to potential malfunctions and hazards.</p> Signup and view all the answers

    In what scenario is the use of the hand crank for the motor-drive unit permitted?

    <p>When the transformer is disconnected and no faults are detected.</p> Signup and view all the answers

    What defines an emergency operation regarding the tap-change operation?

    <p>It is necessary when a tap-change operation must be completed despite a fault.</p> Signup and view all the answers

    What should be done if there is doubt about the condition of the motor-drive unit?

    <p>Immediately contact the Technical Service department.</p> Signup and view all the answers

    Which option best describes the primary purpose of the hand crank during the motor-drive unit's usage?

    <p>To manually operate the unit primarily during installation and testing.</p> Signup and view all the answers

    What is the recommended action if a fault is suspected in the motor-drive unit?

    <p>Contact the Technical Service department immediately.</p> Signup and view all the answers

    What should be observed during an emergency operation of the tap-changer?

    <p>Follow specific warnings and guidelines listed beforehand.</p> Signup and view all the answers

    When is it not necessary to operate the motor-drive unit with a hand crank?

    <p>During normal operation when all systems are functional.</p> Signup and view all the answers

    What must be ensured before using the hand crank for operating the motor-drive unit?

    <p>That a prior tap-change operation was completed correctly.</p> Signup and view all the answers

    What is the main purpose of pipe connection E2?

    <p>To equalize pressure between the transformer tank and oil compartment</p> Signup and view all the answers

    Which of the following statements about pipe connection R is true?

    <p>It can be interchanged with pipe connection Q</p> Signup and view all the answers

    How can the on-load tap-changer be completely emptied?

    <p>Through pipe connection S only</p> Signup and view all the answers

    What function does the vent screw on pipe connection S serve?

    <p>It allows for air to escape during filling or draining</p> Signup and view all the answers

    What is the location of pipe connection E2 in relation to the on-load tap-changer?

    <p>Directly underneath the on-load tap-changer head</p> Signup and view all the answers

    What is indicated by the nameplate on the on-load tap-changer?

    <p>It displays the serial number specific to the on-load tap-changer</p> Signup and view all the answers

    Which component can be connected to pipe connection R?

    <p>An oil conservator</p> Signup and view all the answers

    What is a secondary purpose of pipe connection E2?

    <p>Equalizing pressure between the oil tank and the on-load tap-changer</p> Signup and view all the answers

    Using unsuitable insulating fluids can cause damage to the on-load tap-changer.

    <p>True</p> Signup and view all the answers

    The pressure-operated relay does not respond to gas accumulation under the pressure-operated relay.

    <p>True</p> Signup and view all the answers

    It is permissible to operate the on-load tap-changer without a pressure relief device if it does not have a flange.

    <p>False</p> Signup and view all the answers

    There is only one variant of the pressure monitoring device available for installation.

    <p>False</p> Signup and view all the answers

    The oil compartment of the on-load tap-changer should always be filled with used insulating fluid.

    <p>False</p> Signup and view all the answers

    Establishing a connecting lead between E2 and one of the pipe connections R, S, or Q helps ensure equal pressure in the oil compartment.

    <p>True</p> Signup and view all the answers

    The housing and cover cap of the pressure monitoring device are made from heavy metals.

    <p>False</p> Signup and view all the answers

    Personal protective equipment is required only if the operator feels it is necessary.

    <p>False</p> Signup and view all the answers

    Diverter switch operations at permitted overload cause the pressure-operated relay to trip.

    <p>False</p> Signup and view all the answers

    Multi-step instructions are designed to outline a single process step.

    <p>False</p> Signup and view all the answers

    The IEC publication that applies to the pressure monitoring device is IEC 60214-2.

    <p>False</p> Signup and view all the answers

    Gas accumulation under the pressure-operated relay is an abnormal occurrence.

    <p>False</p> Signup and view all the answers

    Inspecting the on-load tap-changer for a flange attachment is optional and does not affect operational safety.

    <p>False</p> Signup and view all the answers

    Training operators about specific risks associated with improper handling is solely the responsibility of the personnel involved.

    <p>False</p> Signup and view all the answers

    The signal word 'CAUTION' indicates a hazardous situation which, if not avoided, will result in death or serious injury.

    <p>False</p> Signup and view all the answers

    'NOTICE' is a signal word that indicates measures to be taken to prevent damage to property.

    <p>True</p> Signup and view all the answers

    Embedded warnings concern broader sections and apply to larger units of information.

    <p>False</p> Signup and view all the answers

    The warning 'DANGER' does not require immediate corrective action if a potentially hazardous situation is identified.

    <p>False</p> Signup and view all the answers

    Single-step instructions consist of one process step only.

    <p>True</p> Signup and view all the answers

    Pictograms in warning notices always represent dangerous situations.

    <p>False</p> Signup and view all the answers

    If the pressure monitoring device sensor is in the OFF position, the transformer can be started up under any circumstances.

    <p>False</p> Signup and view all the answers

    Before using the equipment again, it is essential to ensure there is no damage to the on-load tap-changer or transformer.

    <p>True</p> Signup and view all the answers

    The second step when a circuit breaker is tripped is to close the oil conservator stop valve immediately.

    <p>False</p> Signup and view all the answers

    If you cannot clarify why the pressure monitoring device tripped, it is recommended to contact Maschinenfabrik Reinhausen.

    <p>True</p> Signup and view all the answers

    The first step after a circuit breaker is tripped by the pressure monitoring device is to ensure the transformer is safe to operate.

    <p>False</p> Signup and view all the answers

    Insulating fluid leaks should be immediately addressed by checking the on-load tap-changer head cover.

    <p>True</p> Signup and view all the answers

    Blocking the motor-drive unit by tripping the motor protective switch is a precautionary step during troubleshooting.

    <p>True</p> Signup and view all the answers

    If the pressure monitoring device sensor is in the OPERATION position, it is advisable to directly start the transformer.

    <p>False</p> Signup and view all the answers

    The transformer must be energized during testing to ensure proper functionality.

    <p>False</p> Signup and view all the answers

    The automatic fire extinguishing device should be active during the testing of the transformer.

    <p>False</p> Signup and view all the answers

    To reset the pressure monitoring device, the sensor on the snap-action switch must be activated.

    <p>True</p> Signup and view all the answers

    The signaling contact for minimum fluid fill level is not connected to the circuit breaker’s tripping circuit.

    <p>False</p> Signup and view all the answers

    All protective devices must be non-functional before closing the transformer's circuit breaker.

    <p>False</p> Signup and view all the answers

    The oil compartment of the on-load tap-changer needs to be completely filled with insulation fluid.

    <p>True</p> Signup and view all the answers

    The transformer’s circuit breaker must be closed with isolating switches open and the transformer ungrounded.

    <p>False</p> Signup and view all the answers

    The passive protection test involves ensuring that the transformer’s circuit breaker cannot be closed.

    <p>True</p> Signup and view all the answers

    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.

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