VACUTAP® VT® Protective Tube Mounting
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Questions and Answers

What is the primary role of an electrically trained person?

  • To perform maintenance independently without supervision.
  • To receive guidance from an electrically skilled person regarding specific tasks. (correct)
  • To operate equipment without any formal training.
  • To educate others on electrical safety protocols.

    • Which of the following statements is true regarding the operator's responsibilities?

  • Operators are not required to follow technical files.
  • Operators should only work on products they have designed themselves.
  • Operators must receive specific instruction on potential dangers from improper handling. (correct)
  • Operators can make modifications to the product without training.

    • What is the recommendation regarding the maintenance and repair of products?

  • Any trained personnel can perform maintenance without restriction.
  • Maintenance can be done by any personnel trained in general mechanical tasks.
  • Maintenance and repairs should be performed by the operating company only.
  • It is advisable to have the Technical Service department carry out maintenance. (correct)

    • Who comprises the category of authorized personnel?

    <p>Personnel trained specifically by Maschinenfabrik Reinhausen GmbH for special maintenance.</p> Signup and view all the answers

    What aspect must electrically trained persons be informed about?

    <p>The protective devices and safety measures for their tasks.</p> Signup and view all the answers

    What is the primary purpose of safety shoes?

    <p>To protect against falling heavy objects and slipping on slippery surfaces.</p> Signup and view all the answers

    What essential qualification must an electrically skilled person possess?

    <p>Technical qualifications with applicable standards and regulations.</p> Signup and view all the answers

    Which personal protective equipment is primarily used to protect the eyes?

    <p>Safety glasses.</p> Signup and view all the answers

    What is a key responsibility of the person in charge of assembly and maintenance?

    <p>To guarantee that personnel are sufficiently qualified.</p> Signup and view all the answers

    What does hearing protection primarily guard against?

    <p>Loud machinery noise that can cause hearing damage.</p> Signup and view all the answers

    Which of the following best describes the purpose of a hard hat?

    <p>To protect against falling and flying parts.</p> Signup and view all the answers

    Which protective equipment is specifically designed to shield the face?

    <p>Visor.</p> Signup and view all the answers

    What should an electrically skilled person be able to do regarding potential dangers?

    <p>Identify potential dangers independently and avoid them.</p> Signup and view all the answers

    What is the initial step when fitting an insulating shaft for a horizontal drive shaft in a configuration with 3 on-load tap-changers?

    <p>Determine dimension C between bevel gear shaft ends</p> Signup and view all the answers

    After shortening the insulating shafts for the on-load tap-changers, what should be done to ensure smooth operation?

    <p>Deburr the cut surfaces of the shortened insulation</p> Signup and view all the answers

    What action should be taken regarding the coupling bolts after shortening the insulating shaft?

    <p>Grease coupling bolts on both shaft ends</p> Signup and view all the answers

    What is the purpose of sliding the screening sleeves onto the insulating shaft?

    <p>To provide additional protection from environmental factors</p> Signup and view all the answers

    How should the insulating shafts be adjusted in configuration with 3 on-load tap-changers?

    <p>Shafts should be shortened based on their corresponding dimensions D and E</p> Signup and view all the answers

    What is the significance of measuring dimension C in the mounting process?

    <p>It allows for proper shortening of insulating shafts</p> Signup and view all the answers

    Which action is NOT part of the insulation shaft installation steps?

    <p>Attaching screening sleeves after installation</p> Signup and view all the answers

    What should be done to the protective tube before securing it with the hose clip?

    <p>Clean and dry both tubes thoroughly</p> Signup and view all the answers

    Which component is responsible for changing the direction of the drive shaft from vertical to horizontal?

    <p>Bevel gear</p> Signup and view all the answers

    What does the take-off contact do in the on-load tap-changer assembly?

    <p>Transfers electrical connections</p> Signup and view all the answers

    Where is the name plate located in the assembly of the tap-changer?

    <p>On the bevel gear's mounting arm</p> Signup and view all the answers

    Which component acts as a mechanical connection between the drive and the on-load tap-changer?

    <p>Insulating shaft</p> Signup and view all the answers

    Which of the following components is NOT part of the on-load tap-changer design?

    <p>Voltage regulator</p> Signup and view all the answers

    What type of shaft is described as the horizontal drive shaft in the context of the tap-changer?

    <p>Square tube</p> Signup and view all the answers

    Which of the following components is most likely involved in adjusting the tap settings under load?

    <p>Switching element</p> Signup and view all the answers

    What primary function does the bevel gear of the motor-drive unit serve?

    <p>To change the direction of motion</p> Signup and view all the answers

    What action should not be taken under any circumstances when a load is suspended?

    <p>Walk under the suspended load</p> Signup and view all the answers

    Which of the following conditions must be met when selecting sling gear?

    <p>Only trained and authorized persons may select it</p> Signup and view all the answers

    What should you do if you find visible transport damage upon receiving a shipment?

    <p>Immediately record and have the issues countersigned by the carrier</p> Signup and view all the answers

    Why is it important to retain packaging material after identifying damage?

    <p>It may be needed for any damage claim evaluation</p> Signup and view all the answers

    How should a recipient confirm the completeness and condition of a shipment?

    <p>Once the crate is unloaded and accessible from all sides</p> Signup and view all the answers

    What type of stress must be considered during transportation of the product?

    <p>Jolts and oscillation stress</p> Signup and view all the answers

    What is the consequence of a crate falling or tipping over during transportation?

    <p>Damage must be expected regardless of the product weight</p> Signup and view all the answers

    What should be done after recording transport damage with the carrier?

    <p>Notify the manufacturer and the relevant insurance company</p> Signup and view all the answers

    Only trained and authorized persons may select the sling gear and secure the load.

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

    It is acceptable to walk under a suspended load if it appears stable.

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

    Damage must be expected if a crate tips over, falls, or undergoes an unbroken fall.

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

    Photographing damage to packaging is unnecessary if it is visually evident.

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

    Transport damage should be recorded in shipping documents and signed by the carrier immediately upon discovery.

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

    Unloading should involve checking for external damage only after the package has been opened.

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

    Jolts during transportation do not need to be considered if the weight stated on the delivery slip is followed.

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

    If severe damage occurs to a shipment, informing the manufacturer is recommended but not immediate.

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

    Only use lubricants and auxiliary materials approved by the manufacturer to avoid damage and malfunctions.

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

    It is acceptable to modify the product without any consultation with the manufacturer if you believe the modification is beneficial.

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

    Personal protective equipment should always be worn to minimize health risks, even if it appears to be undamaged.

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

    Spare parts that have not been approved by the manufacturer can be safely used as long as they fit the product.

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

    Safety markings on the product should remain visible and undamaged to ensure proper safety compliance.

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

    Close-fitting work clothing is recommended because it has a high tearing strength.

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

    Any auxiliary materials used in conjunction with the product can be from a third-party manufacturer without concern.

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

    It is crucial to observe the specified operating conditions and requirements at the installation location.

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

    The drive should be actuated while the on-load tap-changer is uncoupled.

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

    A minimum wait time of 60 seconds is required between trial tap-change operations.

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

    Trial tap-change operations should be carried out without manually turning the hand crank.

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

    It is important for the tap position indicator of the motor-drive unit to match the contact designation on the on-load tap-changer.

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

    Transporting the drive should be done using any available packaging material.

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

    The function of electrical and mechanical end stops must be checked in both end positions.

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

    The motor-drive unit must not be tested before the transformer is energized.

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

    Carrying out successive tap-change operations with short time intervals is acceptable.

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

    Inrush current impulses can never exceed the transformer rated current.

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

    Performing tap-change operations while inrush current is present is recommended.

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

    The motor protective switch tripping indicates a minor fault that can be ignored.

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

    The tap position indicator must be checked if there is no change in voltage from the transformer despite changing the motor-drive unit position.

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

    Contacting MR is necessary when the on-load tap-changer is sluggish.

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

    The diverter switch operation can occur without audible action.

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

    Asymmetrical current paths cannot occur with inrush current impulses.

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

    More serious problems with the on-load tap-changer do not require informing authorized personnel.

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

    The name plate of the on-load tap-changer is located on the top cover.

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

    The operating instructions for the VACUTAP® VT® were originally written in French.

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

    A failure to comply with safety instructions can lead to liability for compensation.

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

    The packaging of the on-load tap-changer ensures its protection during storage and transportation.

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

    The transformer ratio test should be performed before fitting the motor-drive unit.

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

    On-load tap-changers are primarily used to maintain a stable voltage level during load changes.

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

    Grounding the on-load tap-changer is performed during the commissioning process at the manufacturer's site.

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

    Fault elimination procedures are only relevant after the product has left the manufacturer’s site.

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

    The permissible ambient conditions for the on-load tap-changer include extreme temperatures that exceed manufacturer specifications.

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

    Personal protective equipment is listed under safety instructions within the documentation.

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

    Installation and commissioning instructions are only relevant for experienced technicians and not for general personnel.

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

    The fitting drive components section includes details on fitting the motor-drive unit and drive shaft.

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

    The technical data section provides information on the properties and specifications of the on-load tap-changer.

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

    The process of unpacking shipments does not require checking for transportation damages.

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

    What is a key factor in preventing accidents related to personal protective equipment?

    <p>Wearing personal protective equipment that is functional and undamaged</p> Signup and view all the answers

    How should the work area be maintained to minimize the risk of accidents?

    <p>Maintain cleanliness and ensure proper lighting in the work area</p> Signup and view all the answers

    Under what conditions may the product be operated safely?

    <p>In a sound operational condition with reliable safety checks performed</p> Signup and view all the answers

    What must be avoided in areas where explosive risks are present?

    <p>Installing, operating, or performing maintenance on the product</p> Signup and view all the answers

    Why are safety markings such as warning signs essential?

    <p>They constitute a crucial part of the overall safety concept for the product</p> Signup and view all the answers

    What is a common misconception about long hair in the workplace?

    <p>Long hair should be secured with a hairnet to prevent accidents</p> Signup and view all the answers

    What should individuals do before beginning any installation or maintenance work?

    <p>Ensure the product’s operational reliability has been established</p> Signup and view all the answers

    What is a potential consequence of not following safety protocols during maintenance?

    <p>Increased risk of accidents, malfunctions, or environmental harm</p> Signup and view all the answers

    What is the primary function of the bevel gear in the context of the drive shaft?

    <p>To change the direction of the drive shaft from vertical to horizontal</p> Signup and view all the answers

    Which component is positioned on the bevel gear's mounting arm?

    <p>Name plate</p> Signup and view all the answers

    In the design of the on-load tap-changer, which of the following components directly pertains to the electrical conduction?

    <p>Connection contact</p> Signup and view all the answers

    Which of the following accurately describes the role of the insulating shaft in the tap-changer?

    <p>It serves as a mechanical link without conducting electricity</p> Signup and view all the answers

    What is the function of the threaded spindle in the design of an on-load tap-changer?

    <p>To facilitate the adjustment of the tap settings</p> Signup and view all the answers

    Which element is crucial for the functioning of the on-load tap-changer during adjustments under load?

    <p>Active part</p> Signup and view all the answers

    What is the primary purpose of the insulating plate within the tap-changer system?

    <p>To provide a barrier against electrical shorts between components</p> Signup and view all the answers

    Which assembly component could potentially lead to mechanical failure if improperly maintained?

    <p>Bevel gear of the motor-drive unit</p> Signup and view all the answers

    What is the proper course of action if a hand crank is difficult to move during operation?

    <p>Stop using the hand crank immediately.</p> Signup and view all the answers

    Which situation allows the use of a hand crank for operating the motor-drive unit?

    <p>The transformer is disconnected and no fault is detected.</p> Signup and view all the answers

    What should be done if there is uncertainty about the tap-changer's working condition?

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

    During an emergency operation, what is critical to observe?

    <p>Follow the established warnings and guidelines listed for operation.</p> Signup and view all the answers

    If a tap-change operation that has begun electrically is not completed, what should NOT be done?

    <p>Use the hand crank to finish the process.</p> Signup and view all the answers

    What is a defining characteristic of normal operation of the motor-drive unit?

    <p>Manual operation with the hand crank is unnecessary.</p> Signup and view all the answers

    What is indicated by a fault in the motor-drive unit or tap-changer?

    <p>Contact technical support before proceeding with operation.</p> Signup and view all the answers

    What happens during a tap-change operation that is deemed emergency?

    <p>Attention must be paid to any operational warnings.</p> Signup and view all the answers

    What is the primary function of an on-load tap-changer?

    <p>To adjust transmission ratios of transformers without interrupting load flow</p> Signup and view all the answers

    What is one precaution that must be taken to avoid function-related dangers with the product?

    <p>Follow the specified requirements and conditions in the technical file</p> Signup and view all the answers

    What should be done to ensure proper installation of the insulating shafts?

    <p>Follow the specific steps outlined in the installation guidelines</p> Signup and view all the answers

    Why is reading the safety instructions vital when handling the product?

    <p>To avoid potential risks to the user and product performance</p> Signup and view all the answers

    What is indicated by the phrase 'state-of-the-art technology' in the context of the product?

    <p>The product incorporates the latest developments in technology</p> Signup and view all the answers

    What role do safety markings play on the product?

    <p>They ensure compliance with safety regulations and user awareness</p> Signup and view all the answers

    What potential consequences exist from improper use of the product?

    <p>Risks to life, limb, and impairment of material assets</p> Signup and view all the answers

    What should occur if the product demonstrates visible damage upon receipt?

    <p>Immediately inform the carrier and document the damage</p> Signup and view all the answers

    What is the maximum DC current that can be measured without interruption during the change of operating position?

    <p>10 A DC</p> Signup and view all the answers

    What is the rated short-time current for the VACUTAP® VT I 500?

    <p>5 kA</p> Signup and view all the answers

    What must the measured current be during the change of operating position when it involves an interruption?

    <p>0 A</p> Signup and view all the answers

    What is the maximum rated peak withstand current for the on-load tap-changer?

    <p>12.5 kA</p> Signup and view all the answers

    Which of the following statements is true regarding the operating limits of the on-load tap-changer?

    <p>Measured current during tap changing must be zero if interrupted.</p> Signup and view all the answers

    Ambient conditions must be adhered to for reliable and safe operation of the product.

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

    Only lubricants and auxiliary materials not approved by the manufacturer can lead to malfunctions.

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

    Personal protective equipment should be used regardless of its condition during work.

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

    Unauthorized changes to the product can eliminate the risk of personal injury and operational faults.

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

    Close-fitting work clothing should have a high tearing strength and protruding parts.

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

    It is advisable to contact the manufacturer for any spare parts to ensure safety and reliability.

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

    Safety markings on the product can be ignored as long as the product functions correctly.

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

    It is acceptable to wear personal protective equipment that appears undamaged but is not appropriate for the job.

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

    The drive shaft connects the motor-drive unit to the de-energized tap-changer.

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

    The bevel gear specifically serves to switch the tap settings off-load.

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

    The name plate is positioned on the active part of the transformer system.

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

    An insulating shaft can be categorized as a vertical drive shaft.

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

    The switch element is depicted as the seventh component in the detailed drawing of the on-load tap-changer.

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

    The main components of the on-load tap-changer are presented as eight distinct elements.

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

    The Bevel gear in the motor-drive unit functions to connect the insulating plate and the connection contact.

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

    The mounting bridge in the design of the on-load tap-changer corresponds to the fourth component.

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

    The hand crank must be turned only in one specific direction to complete the tap-change operation safely.

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

    After completing a tap-change operation, it's required to keep the protective housing door open to ensure proper ventilation.

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

    The motor protective switch Q1 must be switched on after removing the hand crank from the tap changer.

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

    Damage to the on-load tap-changer can occur if the tap-change operation does not return to its mid-position correctly.

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

    The hand crank interlock switch interrupts only the control circuit during the operation of the motor-drive unit.

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

    Safety glasses protect the eyes from flying parts and splashing liquids.

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

    A hard hat is primarily used to protect the wearer from electrical hazards.

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

    An electrically skilled person does not need any special training for the working environment.

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

    Protective gloves are solely used to guard against mechanical hazards.

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

    Only trained and authorized persons may select the sling gear and secure the load.

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

    Hearing protection is recommended even if the environment appears quiet.

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

    The primary purpose of safety shoes is to protect against electrical hazards.

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

    The use of safety markings on a product is optional as long as the equipment is undamaged.

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

    The weight compensation spring must be replaced after 3 years or 100,000 tap-change operations, whichever comes first.

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

    Cleaning insulating plates and shafts should be performed with a wet cloth to ensure thorough dirt removal.

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

    After every 100,000 tap-change operations, the maintenance performed includes replacing both plug blocks.

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

    Trial tap-change operations should be conducted twice within the regulating range to ensure proper functioning.

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

    The maintenance plan indicates that used grease should be removed from eight specific parts including the movable output terminal.

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

    Lubricating parts with ISOFLEX TOPAS NCA 5051 is optional and does not impact the function of the transformer.

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

    Insulating shafts and plates require cleaning once a year as part of the maintenance protocol.

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

    The first maintenance schedule occurs after a minimum of 2 years or upon completion of 150,000 tap-change operations.

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

    Study Notes

    Mounting Instructions

    • Secure the upper protective tube to the bottom protective tube using hose clips at both the top and connection points.
    • When installing three on-load tap-changers, adhere to insulation spacing requirements detailed in Section 9.4.
    • For the insulating shaft, measure and shorten to specific lengths based on gear positioning, accounting for a margin of 53 mm.
    • After cutting, deburr the surfaces of the insulated shaft.
    • Grease coupling bolts and insert coupling sleeves over them; slide screening sleeves onto the insulating shaft as a protective measure.

    Personal Protective Equipment (PPE)

    • Safety Shoes: Protect against falling objects and slips.
    • Safety Glasses: Guard the eyes from flying debris and splashes.
    • Visor: Shields the face from impact and hazardous substances.
    • Hard Hat: Offers protection from falling materials.
    • Hearing Protection: Prevents hearing damage from noise exposure.
    • Protective Gloves: Safeguard against mechanical, thermal, and electrical risks.

    Personnel Qualifications

    • Personnel responsible for assembly, commissioning, and maintenance must be qualified:
      • Electrically Skilled Person: Has technical qualifications, experience, and knowledge of applicable standards.
      • Electrically Trained Person: Works under supervision; receives guidance regarding potential dangers and safety measures.
      • Operator: Uses the product in line with provided instructions and training.
      • Technical Service: Maintenance by qualified technicians is essential for safety and efficacy. Ensure authorized personnel handle specialized maintenance.

    Product Description and Components

    • A detailed overview of the components includes:
      • Transformer tank
      • Motor-drive unit
      • Bevel gear systems for both on-load tap-changer and motor-drive unit
      • Insulating shafts and screening sleeves
    • The name plate is located on the bevel gear's mounting arm, providing identifying information.

    Drive Shaft Functionality

    • The drive shaft connects the drive unit to the on-load tap-changer; it aligns the direction of operation from vertical to horizontal through beveled gearing.
    • Proper securing and transport are critical to prevent damage during handling; avoid walking under suspended loads and ensure adequate carrying capacity for lifting gear.

    Handling and Inspection of Shipped Products

    • Upon delivery, the recipient should:
      • Verify completeness and check for external damage.
      • In case of damage, document it and notify the carrier and manufacturer immediately while retaining all packaging materials for potential claims.
      • Report findings and conduct inspections as necessary, documenting visible damages and noting signs of moisture-related issues.

    Introduction

    • Technical file provides guidance on safe installation, connection, and commissioning of VACUTAP® VT®.
    • Importance of observing and maintaining safety markings on the product.
    • Operation must comply with specified ambient conditions for reliability and safety.

    Safety

    • Use only approved auxiliary materials and operating materials to prevent injuries and malfunctions.
    • Unauthorized modifications can lead to serious personal injury and operational faults.
    • Personal protective equipment (PPE) is mandatory; it should be appropriate for the task and in good condition.
    • Protective clothing should be close-fitting with minimal tearing risk and no protruding parts.
    • Secure loads sufficiently when delivered on pallets; avoid walking under suspended loads.
    • Check each shipment upon receipt for completeness and external damage.

    Product Description

    • Detailed information regarding the on-load tap-changer's function, design, and the drive shaft is included.
    • Clear identification through nameplates aids in assessing specifications and requirements.

    Packaging, Transport, and Storage

    • Packaging must be suitable and marked for safe handling and transport.
    • Products must be handled carefully to avoid transport damages such as tipping or dropping.
    • Post-delivery, inspect items for any visible damage, document and report any issues immediately.

    Mounting

    • On-load tap-changer must be installed correctly on transformers, ensuring all connections are secure.
    • Connect the tap winding and take-off leads to ensure operational efficiency.
    • Trial tap-change operations are necessary for verifying mechanical functions before transformer energization.

    Commissioning

    • Commissioning should occur at both the manufacturer's site and the operational site with necessary trial operations.
    • High-voltage tests on the transformer are critical before putting it into operational status.
    • Ensure the motor-drive unit functions correctly prior to transformer energization.

    Fault Elimination

    • A section is dedicated to identifying and resolving common faults in operation, ensuring reliability.

    Technical Data

    • Technical specifications for the on-load tap-changer and permissible ambient conditions are outlined for reference.

    Drawings

    • Installation, dimensional, and adjustment drawings provide essential visual aid for proper assembly and setup throughout various bracket variants and configurations.### Inrush Current and Tap-Changer Operations
    • Inrush current impulses can exceed transformer rated current significantly, causing potential damage.
    • Asymmetrical or non-sinusoidal current paths may occur during diverter switch operation.
    • Tap-change operations should only be performed once inrush current impulses have dissipated, regardless of load conditions.

    Fault Detection and Remediation

    • A table is provided to assist with identifying and rectifying faults in on-load tap-changers and motor-drive units.
    • For serious issues that are not easily corrected on-site, contact Maschinenfabrik Reinhausen GmbH or consult an authorized MR representative.

    Contact Information for Service

    • Technical Service at Maschinenfabrik Reinhausen GmbH is available for support.
    • Address: Postfach 12 03 60, 93025 Regensburg, Germany.
    • Phone: +49 94140 90-0, Fax: +49 941 40 90-7001.
    • Email: [email protected].
    • Website: www.reinhausen.com.

    Common Error Patterns and Actions

    • If the motor protective switch in the motor-drive unit trips, request an "Information sheet on motor protective switch tripping" from MR.
    • For sluggish tap changes or inactive keys, contact MR for assistance.
    • If no voltage change occurs despite changes in motor-drive unit position, reach out to MR for support.
    • If the tap position indicator fails, consult MR for troubleshooting steps.

    Single-step and Multi-step Instructions

    • Single-step instructions are structured with an aim, optional requirements, one step, and optional results.
    • Multi-step instructions involve multiple steps sequentially numbered, also including an aim and optional requirements and results.

    Safety Guidelines

    • Thoroughly read the technical file to understand the product.
    • Warnings must be followed to prevent function-related dangers.
    • The on-load tap-changer is designed for safe operation in electrical energy systems.

    Appropriate Use

    • Designed for adjustment of transformer transmission ratios without interrupting load flow.
    • Ensures safety when used according to technical specifications and guidelines.

    Fundamental Safety Instructions

    • Transport, installation, operation, maintenance, and disposal responsibilities are crucial for safety.
    • Personal protective equipment (PPE) is mandatory; helmets, gloves, and hairnets should be worn.
    • Work areas must be clean, tidy, and well-lit to prevent accidents.

    Working During Operation

    • The product must operate in good condition to prevent risks to life and limb.
    • Regular checks and compliance with maintenance schedules are essential.

    Explosion Protection

    • Avoid installation and maintenance in areas with flammable or explosive hazards.

    Safety Markings

    • Warning signs and safety labels must be adhered to for safe product handling.

    Product Description

    • The on-load tap-changer is depicted in a 3-phase system with key components like transformers, motor-drive units, and the active part.
    • Detailed diagrams showcase the components, including insulating plates and switching elements.

    Drive Shaft Functionality

    • The drive shaft connects the motor-drive unit to the tap-changer, converting vertical motion to horizontal.
    • Never operate the motor-drive unit while the transformer is connected if a fault is suspected.

    Normal and Emergency Operations

    • Under normal circumstances, the hand crank is used during installation or for testing.
    • Emergency procedures must be followed if tap-changer operation is needed during transformer energization, ensuring safety warnings are heeded.

    Technical Data Overview

    • Key specifications for the VACUTAP® VT I 500 include:
      • Maximum rated through-current: 500 A
      • Rated short-time current: 5 kA with a duration of 3 seconds
      • Rated peak withstand current: 12.5 kA

    Safety Markings and Conditions

    • Observe and maintain all safety markings on the product; replace any that are damaged or missing.
    • Operate the product only under specified ambient conditions to ensure reliability and safety.

    Auxiliary Materials and Modifications

    • Use only manufacturer-approved lubricants and auxiliary materials to prevent malfunction and injury.
    • Modifications should only be conducted after consulting with Maschinenfabrik Reinhausen GmbH to avoid operational faults.

    Spare Parts

    • Utilize only spare parts approved by Maschinenfabrik Reinhausen GmbH to prevent injuries and damage.

    Personal Protective Equipment (PPE)

    • Required PPE includes:
      • Close-fitting clothing to prevent entanglement.
      • Safety shoes to protect against heavy objects and slips.
      • Safety glasses and visors for eye and face protection against flying debris.
      • Hard hats to guard against falling materials.
      • Hearing protection to prevent hearing damage.
      • Protective gloves for mechanical, thermal, and electrical safety.

    Personnel Qualification

    • Personnel responsible for assembly and maintenance must be qualified and knowledgeable about safety standards.
    • Electrically skilled individuals can identify hazards and perform work on electrical systems per safety regulations.

    Product Description

    • Main components of the on-load tap-changer include transformer tank, drive unit, and operational gear.
    • Each component serves a specific function within the electrical system's maintenance and operation.

    Drive Shaft Function

    • The drive shaft connects the motor to the on-load tap-changer, converting vertical motion to horizontal.

    Operating Procedures

    • To manually operate the motor-drive unit, switch off the protective switch, use a hand crank, and ensure the tap-change operation is completed without interruption.

    Fault Elimination

    • An inspection plan aids in identifying and remedying faults in the operation of the system.

    Maintenance Procedures

    • Disconnect power before any maintenance work to mitigate electric shock risks.
    • Regularly clean and lubricate parts, including insulating plates and shafts, with specified lubricants.

    Maintenance Intervals

    • First maintenance should occur after 2 years or 100,000 tap-change operations—whichever comes first.
    • Regular maintenance every 100,000 tap-change operations includes checking and replacing key components, such as weight compensation springs and plug blocks.

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    Related Documents

    VACUTAP® VT® Installation and Commissioning Instructions PDF
    VACUTAP® VT® On-load Tap-changer Operating Instructions PDF

    Description

    This quiz covers the installation process for the VACUTAP® VT® system, specifically focusing on securing the upper protective tube to the bottom protective tube using hose clips. Detailed steps and important considerations are outlined for effective assembly.

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