VACUTAP® VRC/VRE Overview
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Questions and Answers

What is the purpose of the pipe connection Q in the VACUTAP® equipment?

  • It serves as a bypass for pressure regulation.
  • It connects to the tap selector for enhanced control.
  • It is closed with a blank cover. (correct)
  • It is used to facilitate oil flow to the on-load tap-changer head.

    • Which component in the VACUTAP® system is indicated as capable of being freely swiveled once the pressure ring is loosened?

  • On-load tap-changer head
  • Oil compartment
  • Change-over selector
  • Pipe bends (correct)

    • What is the primary risk associated with an unstably positioned selector?

  • It could damage the oil compartment's internal components.
  • It might block the selector's operational capabilities.
  • It can tip over, leading to injuries and property damage. (correct)
  • It may cause a power failure in the system.

    • How many pipe connections does the on-load tap-changer head feature for different purposes?

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

    Which action must be taken before removing the red-colored packaging material from the selector?

    <p>Fix the selector to the oil compartment.</p> Signup and view all the answers

    What aspect of the pipe connections is mentioned in relation to their installation?

    <p>Some pipe connections are fitted with pipe bends ex factory.</p> Signup and view all the answers

    What happens once the blocking strip is removed from the selector coupling?

    <p>The selector coupling cannot be turned anymore.</p> Signup and view all the answers

    What is the role of the change-over selector in the VACUTAP® system?

    <p>To select different operating modes for the tap-changer.</p> Signup and view all the answers

    What is the maximum weight of the selector that should be considered when lifting?

    <p>270 kg</p> Signup and view all the answers

    What precaution should be taken to prevent collision damage between the selector and oil compartment?

    <p>Lift the selector carefully to avoid collision.</p> Signup and view all the answers

    What is the maximum height for stacking crates to prevent property damage?

    <p>1.5 m</p> Signup and view all the answers

    What visual indicator is used on sealed packaging of dried products?

    <p>Yellow label</p> Signup and view all the answers

    What should be ensured about the stacked crates in order to maintain the integrity of the packaged goods?

    <p>No parts should touch the loading surface.</p> Signup and view all the answers

    What component is added to the packaging to protect the goods from humidity?

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

    Which of the following is true about stacking crates?

    <p>Two equal-sized crates can be stacked on top of each other.</p> Signup and view all the answers

    What should be ensured while lifting the selector onto the oil compartment?

    <p>The tap-selector leads and potential connection unit should not touch the compartment.</p> Signup and view all the answers

    Which step is crucial before screwing the selector onto the oil compartment?

    <p>Aligning the position of coupling parts and attachment points correctly.</p> Signup and view all the answers

    What could be a potential consequence of incorrect tightening torques?

    <p>Damage to the on-load tap-changer.</p> Signup and view all the answers

    What is a major risk if the selector is unstably positioned during installation?

    <p>It may tip, leading to injuries or property damage.</p> Signup and view all the answers

    What is the recommended action after securing screw connections?

    <p>Snap the screening caps in place over the screw heads.</p> Signup and view all the answers

    What is the potential consequence of incorrect tightening torques in the assembly of the tap changer?

    <p>Damage to the on-load tap-changer</p> Signup and view all the answers

    Which action is necessary to ensure proper assembly of the tap-selector connections?

    <p>Secure screw connections and snap screening caps in place</p> Signup and view all the answers

    What should be carefully monitored to avoid damage during the mounting process?

    <p>The mechanical strain on the connecting leads</p> Signup and view all the answers

    What is indicated by the adjustment plans regarding the positioning of coupling parts?

    <p>The correct position is clearly outlined</p> Signup and view all the answers

    What is the first step outlined for preparation in the mounting process?

    <p>Screw selector onto oil compartment</p> Signup and view all the answers

    The VACUTAP® product is designed exclusively for use in hydraulic systems.

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

    Reading and observing the warnings in the technical file can help avoid function-related dangers.

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

    The technical file must be disregarded once the product is familiarized by the user.

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

    Improper use of the VACUTAP® product poses no risks to the user or the environment.

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

    For the VACUTAP® product, ensuring appropriate use eliminates any danger to people and property.

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

    Only use lubricants and auxiliary materials that are approved by the manufacturer.

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

    Modifications to the product can be performed without consulting Maschinenfabrik Reinhausen GmbH.

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

    The electrically skilled person must have no prior experience or knowledge before working on electrical systems.

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

    Spare parts approved by Maschinenfabrik Reinhausen GmbH are essential to prevent malfunctions.

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

    Personnel responsible for maintenance must be untrained individuals to avoid accidental risks.

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

    The sealed packaging includes a yellow label for all packaged goods, regardless of their condition.

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

    Crates should not be stacked higher than 1.5 m to prevent potential property damage.

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

    The desiccant is added after the plastic foil is bonded to the packaging.

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

    It is permissible to stack up to four equally sized crates on top of one another.

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

    Sealed packaging protects packaged goods from humidity without any additional components.

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

    The protective relay is activated when the flow of insulating fluid exceeds a certain speed due to a fault.

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

    Diverter switch operations at rated switching capacity will cause the protective relay to trip.

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

    The nameplate with the serial number is located on the transformer tank.

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

    An unstably positioned selector poses no risk of tipping over and causing injuries or property damage.

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

    It is required to remove the red protective cap on the 0-bar of the change-over selector before fixing the selector to the oil compartment.

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

    The flap valve in the protective relay system moves to the OFF position when a fault occurs.

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

    Removing the blocking strip from the selector coupling allows for unrestricted movement of the selector coupling.

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

    The pipe connection also serves to equalize the pressure in the oil compartment before transportation.

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

    Securing the selector on a level surface prior to installation is a necessary precaution to prevent tipping.

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

    The plastic bag with fastening materials is to be discarded before the mounting process begins.

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

    What is a potential consequence of operating outside of the permitted electrical conditions?

    <p>Injury to persons and damage to the product</p> Signup and view all the answers

    Which type of clothing poses a significant risk when working with electrical machines?

    <p>Loosely worn or unsuitable clothing</p> Signup and view all the answers

    What type of accident prevention measure is highlighted as crucial for personnel involved in operation and maintenance?

    <p>Using personal protective equipment</p> Signup and view all the answers

    What should personnel ensure when choosing personal protective gear for electrical work?

    <p>The gear is suitable and not damaged</p> Signup and view all the answers

    What can cause higher voltages due to transformer overexcitation?

    <p>Load shedding</p> Signup and view all the answers

    What measure should be taken to prevent accidents when wearing long hair around machinery?

    <p>Wear a hairnet</p> Signup and view all the answers

    Which of the following is not a prohibited operating condition?

    <p>Using personal protective equipment</p> Signup and view all the answers

    What should individuals responsible for maintaining electrical equipment ensure about their personal protective equipment?

    <p>It is worn correctly and in good condition</p> Signup and view all the answers

    What function can the pipe connection R serve in relation to the on-load tap-changer?

    <p>It is used exclusively for the attachment of the protective relay.</p> Signup and view all the answers

    What significant feature does the pipe connection S possess for operation?

    <p>It contains a vent screw and can be connected to a drain valve.</p> Signup and view all the answers

    Which of the following statements about pipe connection E2 is correct?

    <p>It is sealed with a blank cover and can connect to a collective pipe if necessary.</p> Signup and view all the answers

    How is the interchangeability of the functions between pipe connections R and Q indicated?

    <p>Both connections are labeled with the same designation.</p> Signup and view all the answers

    What safety measure can be implemented regarding the connection cables for the tap-change supervisory device?

    <p>They should be fed through the closed connections to reduce external exposure.</p> Signup and view all the answers

    Which action should be taken regarding pipe connection Q during the installation of the on-load tap-changer?

    <p>It needs to be covered with a blank cover if unused.</p> Signup and view all the answers

    What aspect of the pipe connection S enhances its functionality while maintaining safety?

    <p>Its ability to vent excess pressure without compromising connection integrity.</p> Signup and view all the answers

    In which way can the presence of a tap-change supervisory device influence the configuration of pipe connection Q?

    <p>It modifies the way the connection cables are routed through the pipe.</p> Signup and view all the answers

    What is a critical safety measure when commissioning a transformer to prevent explosions?

    <p>Ensuring no ignition sources are present</p> Signup and view all the answers

    Which of the following fluids should be used in the oil compartment of the on-load tap-changer to avoid damage?

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

    What could be a consequence of operating the on-load tap-changer beyond its specified limits?

    <p>Increased likelihood of explosion</p> Signup and view all the answers

    Why is it important to fit a pressure relief device on the on-load tap-changer head if it has a flange?

    <p>To prevent potential damage to the tap-changer</p> Signup and view all the answers

    Which of the following is a risk associated with the improper filling of the oil compartment?

    <p>Damage due to unsuitable insulating fluids</p> Signup and view all the answers

    What is a precaution that should be taken regarding electrical devices during commissioning?

    <p>Only non-electrical tools should be used</p> Signup and view all the answers

    How can the risk of static charge build-up be managed in the vicinity of the transformer?

    <p>By using conductive and grounded hoses and equipment</p> Signup and view all the answers

    What is the consequence of neglecting to secure the selector on a level surface prior to installation?

    <p>Risk of tipping over and causing injuries</p> Signup and view all the answers

    What must be checked when the pressure relief device trips?

    <p>Both the on-load tap-changer and transformer must be checked.</p> Signup and view all the answers

    What is the appropriate action after activating the tap-change supervisory device?

    <p>The motor-drive unit should no longer be electrically actuated.</p> Signup and view all the answers

    Which action is crucial for re-commissioning a transformer after tripping the protective relay?

    <p>Contact the manufacturer and perform necessary measurements.</p> Signup and view all the answers

    What is the consequence of incorrectly tightening torques in the assembly of the tap changer?

    <p>It may lead to leaks or pressure inconsistencies.</p> Signup and view all the answers

    What should be done if the pressure monitoring device trips?

    <p>Contact the manufacturer and conduct necessary precautions for safe operation.</p> Signup and view all the answers

    Which safety measure must be adhered to regarding the motor-drive unit during maintenance?

    <p>The motor-drive unit should remain disconnected during servicing.</p> Signup and view all the answers

    What is critical to ensure before lifting the selector onto the oil compartment?

    <p>It must be checked that the selector is balanced and stable.</p> Signup and view all the answers

    Which guideline applies to the storage of crates to avoid damage?

    <p>Crates should be stacked no higher than 1.5 m.</p> Signup and view all the answers

    What should be confirmed before using the on-load tap-changer and transformer again after tripping?

    <p>There is certainty that no damage has occurred to the on-load tap-changer or transformer.</p> Signup and view all the answers

    Which piece of information is NOT required to be communicated to Maschinenfabrik Reinhausen after the relay has tripped?

    <p>The general cooling requirements of the surrounding area.</p> Signup and view all the answers

    What is the first step that should be taken if the pressure monitoring device trips?

    <p>Establish the time of tripping.</p> Signup and view all the answers

    What precaution should be taken before activating the transformer after a fault has been detected?

    <p>Verify that all monitoring devices are operational.</p> Signup and view all the answers

    Which factor is NOT considered during the re-commissioning of the transformer?

    <p>The type of lubricant used in the transformer.</p> Signup and view all the answers

    Which condition must be established before determining the next steps after a tripping incident?

    <p>The specific cause of the protective relay tripping is identified.</p> Signup and view all the answers

    What action immediately follows the determination of the time of tripping?

    <p>Detection of the operating position of the on-load tap-changer.</p> Signup and view all the answers

    What potential risk must be recognized when re-commissioning a transformer after a trip?

    <p>Insufficient testing may lead to severe injury or death.</p> Signup and view all the answers

    The pressure monitoring device activates the circuit breaker when the pressure decreases unexpectedly.

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

    Low-energy interference is sufficient to trip the pressure monitoring device.

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

    The pressure monitoring device is designed to respond slower than the protective relay.

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

    The tripping pressure of the pressure monitoring device can be adjusted after it is set at the factory.

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

    The sensor on the snap-action switch automatically resets after tripping.

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

    A corrugated tube is used as a barometer in the pressure monitoring device.

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

    The warning of dangerous electrical voltage is part of the product's safety markings.

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

    The pressure monitoring device is integral to the operation of the transformer, preventing underpressure conditions.

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

    The protective relay is functioning correctly when the flap valve is in the OFF position.

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

    Grounding is required on both high-voltage and low-voltage sides before testing the pressure monitoring device.

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

    The circuit breaker should remain closed during the testing of the protective relay.

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

    The sensor on the snap-action switch is in the OFF position when it is activated for testing.

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

    Removing the cover cap is the first step in checking the pressure monitoring device.

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

    The active protection test is conducted after ensuring the transformer’s circuit breaker is open.

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

    To reset the pressure monitoring device, the sensor needs to be activated again to return to the OFF position.

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

    During the checks, the automatic fire extinguishing device should remain activated.

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

    The inrush current impulses can be significantly less than the transformer rated current and will not jeopardize the on-load tap-changer during operation.

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

    The signaling contact for falling below the minimum insulating fluid fill level in the on-load tap-changer's oil conservator is not linked to the circuit breaker tripping circuit.

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

    It's safe to operate the motor-drive unit with the hand crank if the transformer is suspected to be faulty.

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

    All stop-cocks between the on-load tap-changer and oil conservator must be closed before switching on the transformer.

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

    The oil compartment of the on-load tap-changer should be empty before commissioning the transformer.

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

    It is permissible to use the hand crank to finish a tap-change operation that was initiated electrically.

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

    The protective relay is triggered when there is a deficiency in the flow of insulating fluid caused by a fault.

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

    Once the inrush current impulse has subsided, tap-change operations may be performed safely under any load conditions.

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

    The hand crank can be used for normal operation of the motor-drive unit at any time.

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

    It is permissible to operate the motor-drive unit with the hand crank if there is a detectable fault.

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

    An emergency operation is required when a tap-change operation is needed while the transformer is energized, despite a fault.

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

    The motor protective switch Q1 should be in position 1 before operating with the hand crank.

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

    It's acceptable to reverse the direction of rotation when using the hand crank.

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

    Contacting the Technical Service department is advisable if there are doubts about the motor-drive unit's functionality.

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

    The hand crank is required for operational checks after every tap-change operation regardless of other conditions.

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

    If unsure about the fault cause in the motor-drive unit, one should continue operating the unit to diagnose.

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

    The hand crank mounted in the motor-drive unit interrupts the control circuit during operation.

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

    Damage to the on-load tap-changer can occur if the tap-change operation is completed incorrectly.

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

    The protective relay must be tripped to energize the transformer without inspection.

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

    Explosive gases can deflagrate if ignition sources are present near the on-load tap-changer head cover.

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

    It is safe to operate electrical devices while removing the on-load tap-changer head cover.

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

    The pointer on the tap-change indicator should complete two full circles to indicate a completed tap-change operation.

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

    De-energizing all auxiliary circuits is not necessary before removing the on-load tap-changer head cover.

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

    The hand crank should be positioned in the area marked in green on the tap-change indicator for proper operation.

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

    Study Notes

    VACUTAP® VRC/VRE

    • On-load tap-changer head enables voltage regulation without disconnection.
    • Tap selector allows for changing taps to adjust output voltage.
    • Oil compartment provides insulation and cooling for electrical components.
    • Change-over selector facilitates selection between different operational modes.

    VACUTAP® VRD/VRF

    • Features include an on-load tap-changer head, tap selector, oil compartment, and change-over selector.
    • Pipe connections in the on-load tap-changer head serve various functional purposes.

    VACUTAP® VRG

    • Incorporates the same components as previous models: on-load tap-changer head, tap selector, oil compartment, change-over selector.
    • Supports versatility in operational configurations.

    Pipe Connections

    • Four pipe connections available on the on-load tap-changer head.
    • Pipe bends may be fitted from the factory and are adjustable once pressure rings are loosened.
    • Pipe connection Q is closed with a blank cover to maintain system integrity.
    • Sealed packaging with plastic wrap protects products from humidity and physical damage.

    Packaging and Handling

    • Crates marked for proper stacking; do not exceed 1.5 meters height.
    • Only two identical-sized crates should be stacked.
    • Movement of packages should follow local transportation regulations to ensure product safety.

    Mounting Procedures

    • Care must be taken to stabilize the selector during mounting to prevent tipping.
    • Remove protective packaging only after securing the selector to the oil compartment.
    • Selector weight can reach up to 270 kg; lifting requires caution to avoid collisions with other components.
    • Correct alignment and torque specifications are crucial during the assembly to prevent damage.
    • The presence of support components must be noted and removed to facilitate secure connections.

    General Notices

    • Incorrect stacking can cause product damage; always follow outer markings on packaging.
    • Careful handling during lifting and installation is essential to avoid mechanical strain on the equipment.
    • Secure all screw connections properly and use screening caps as necessary to cover connection points.

    Multi-Step Instructions

    • Instructions consist of multiple process steps with an aim, requirements, and results linked to each step.

    Safety Guidelines

    • Familiarize yourself with the technical file and comply with safety instructions to avoid hazards.
    • Risks of life and damage can arise from improper use; the device should only be used in accordance with specified guidelines.
    • Use only manufacturer-approved lubricants and auxiliary materials; unauthorized modifications can lead to injuries and operational faults.

    Appropriate Use

    • The VACUTAP® VR® is an on-load tap-changer designed to adjust the transmission ratio of transformers without interrupting the load flow.
    • Compliant use ensures no danger to people, property, or the environment.

    Personnel Qualifications

    • Assembly, commissioning, and maintenance must be performed by electrically skilled personnel with proper qualifications and knowledge of applicable standards.

    Device Features

    • A pressure-equalizing pipe connection is necessary for transformer maintenance, including drying and filling with insulating fluid.
    • The nameplate on the tap-changer head cover includes the serial number for identification.

    Protective Devices

    • The protective relay is integrated into the circuit breaker tripping circuit and trips when flow speed exceeds safe limits, automatically de-energizing the transformer.
    • The protective relay conforms to IEC publication 60214-1 standards.

    Packaging and Transport Precautions

    • Packages should not be stacked over 1.5 meters, with specific instructions for upright packaging.
    • Sturdy crates and sealed plastic packaging protect the goods from humidity and physical deterioration during transport.

    Mounting Instructions

    • Ensure the tap selector is securely positioned to avoid tipping and potential injuries.
    • Remove protective packaging only after proper securing of components, and manage assembly materials carefully to maintain stability during installation.

    Prohibited Electrical Operating Conditions

    • Compliance with design data in order confirmation is mandatory to avoid prohibited operating conditions.
    • Prohibited conditions can be caused by short circuits or inrush current when energizing transformers or electrical machines.
    • Higher voltages may occur due to transformer overexcitation, especially after load shedding.
    • Operations outside permitted conditions can result in personal injury and product damage; preventive measures must be taken.

    Fundamental Safety Instructions

    • Those involved in transport, installation, operation, maintenance, and disposal of the product must adhere to safety protocols.
    • Wear appropriate personal protective equipment to prevent accidents and injuries.
    • Avoid loose or unsuitable clothing that could get caught in moving parts; jewelry should not be worn.
    • Long hair must be secured to avoid entanglement in machinery.

    Product Description and Pipe Connections

    • Some pipe connections come designed with pipe bends from the factory for flexibility in installation.
    • Pipe connection Q includes a sealed cover; it is interchangeable with connection R for tap-change supervisory device cables.
    • Pipe connection S features a vent screw and facilitates draining oil when connected to a transformer drain valve.
    • Pipe connection E2 connects to the oil tank beneath the tap-changer head and can link to a collective pipe for the Buchholz relay.
    • Caution is required to prevent explosions from explosive gases in the oil compartment and surrounding areas.

    Commissioning the Transformer

    • Unsuitable insulating fluids can damage the on-load tap-changer; only approved fluids should be used.
    • Check if the on-load tap-changer head cover accommodates a pressure relief device; it must be installed to prevent damage.

    Fault Elimination Procedures

    • Tripping of protective relays and pressure devices indicates potential equipment issues requiring immediate inspection.
    • Monitor conditions, load status, and any operational changes at the time of tripping to diagnose causes.
    • Re-commissioning involves checking the protective relay and ensuring the transformer is ready for operation.
    • If pressure monitoring devices trip, assess the system for damage and contact service for thorough checks before reuse.

    Safety Warnings

    • Underestimating tests on the on-load tap-changer can cause severe injury or death; professional advice is critical after tripping events.
    • Ensure no physical or operational damage to the transformer and on-load tap-changer before restarting operations.

    Safety Markings

    • Protective conductor connection, warning of dangerous electrical voltage, and the importance of reading the documentation for safety compliance.

    Pressure Monitoring Device DW

    • The DW 2000 device safeguards the on-load tap-changer against impermissible pressure increases.
    • Located externally on the on-load tap-changer, it activates upon detecting static and dynamic pressures in the oil compartment.
    • Utilizes a corrugated tube and spring mechanism linked to a snap-action switch sensor.
    • A pressure increase triggers the sensor to switch to the OFF position, de-energizing the transformer.

    Tripping Mechanism

    • The pressure monitoring device is factory-set, preventing accidental changes to the tripping pressure.
    • Responds to rapid pressure increases more quickly than the standard protective relay of the MR protection system.

    Protective Relay (RS 2004) Inspection

    • Verify functionality before transformer commissioning by checking the flap valve position and ensuring the transformer is grounded.
    • Test procedure includes pressing the OFF button and checking that the circuit breaker remains open for active protection validation.

    Pressure Monitoring Device Testing

    • Proper grounding and de-energization are essential before sensor activation to confirm the OFF position.
    • Follow a step-by-step testing process to ensure the sensor functions correctly before commissioning the transformer.

    Transformer Commissioning

    • Ensure the oil compartment is fully filled and all stop-cocks are open.
    • Signaling contact for low insulating fluid level must be integrated into the circuit breaker's tripping circuit.
    • Caution against inrush current exceeding rated current during tap-change operations.

    Operating the Motor-Drive Unit

    • Unauthorized use of the hand crank poses severe explosion risks; it requires disconnecting the transformer first.
    • Hand crank operation is primarily for installation and maintenance, not normal operation.

    Tap-Change Operation with Hand Crank

    • Precise steps include switching off the motor protective switch and fully turning the hand crank.
    • Ensure pointer returns to the mid-position on the tap-change indicator before concluding the operation.

    Fault Elimination Precautions

    • Potential explosive hazards exist under the on-load tap-changer cover; ensure absence of ignition sources.
    • Auxiliary circuits must be de-energized before cover removal to prevent sparks or deflagration.
    • Inspect the on-load tap-changer and transformer if protective devices trip to avoid further damage.

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    Related Documents

    VACUTAP VR On-load Tap-Changer Installation & Commissioning Instructions PDF
    On-load Tap-Changer Operating Instructions PDF

    Description

    This quiz covers the key features and components of the VACUTAP® VRC/VRE tap changer, including the on-load tap-changer head and oil compartment. It provides an opportunity to understand the mechanical parts involved and their functions. Perfect for engineering students and professionals keen on electrical device operations.

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