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Questions and Answers
What is the primary role of an electrically trained person?
Which of the following statements is true regarding the operator's responsibilities?
What is the recommendation regarding the maintenance and repair of products?
Who comprises the category of authorized personnel?
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What aspect must electrically trained persons be informed about?
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What is the primary purpose of safety shoes?
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What essential qualification must an electrically skilled person possess?
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Which personal protective equipment is primarily used to protect the eyes?
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What is a key responsibility of the person in charge of assembly and maintenance?
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What does hearing protection primarily guard against?
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Which of the following best describes the purpose of a hard hat?
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Which protective equipment is specifically designed to shield the face?
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What should an electrically skilled person be able to do regarding potential dangers?
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What is the initial step when fitting an insulating shaft for a horizontal drive shaft in a configuration with 3 on-load tap-changers?
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After shortening the insulating shafts for the on-load tap-changers, what should be done to ensure smooth operation?
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What action should be taken regarding the coupling bolts after shortening the insulating shaft?
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What is the purpose of sliding the screening sleeves onto the insulating shaft?
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How should the insulating shafts be adjusted in configuration with 3 on-load tap-changers?
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What is the significance of measuring dimension C in the mounting process?
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Which action is NOT part of the insulation shaft installation steps?
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What should be done to the protective tube before securing it with the hose clip?
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Which component is responsible for changing the direction of the drive shaft from vertical to horizontal?
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What does the take-off contact do in the on-load tap-changer assembly?
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Where is the name plate located in the assembly of the tap-changer?
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Which component acts as a mechanical connection between the drive and the on-load tap-changer?
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Which of the following components is NOT part of the on-load tap-changer design?
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What type of shaft is described as the horizontal drive shaft in the context of the tap-changer?
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Which of the following components is most likely involved in adjusting the tap settings under load?
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What primary function does the bevel gear of the motor-drive unit serve?
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What action should not be taken under any circumstances when a load is suspended?
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Which of the following conditions must be met when selecting sling gear?
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What should you do if you find visible transport damage upon receiving a shipment?
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Why is it important to retain packaging material after identifying damage?
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How should a recipient confirm the completeness and condition of a shipment?
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What type of stress must be considered during transportation of the product?
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What is the consequence of a crate falling or tipping over during transportation?
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What should be done after recording transport damage with the carrier?
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Only trained and authorized persons may select the sling gear and secure the load.
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It is acceptable to walk under a suspended load if it appears stable.
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Damage must be expected if a crate tips over, falls, or undergoes an unbroken fall.
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Photographing damage to packaging is unnecessary if it is visually evident.
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Transport damage should be recorded in shipping documents and signed by the carrier immediately upon discovery.
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Unloading should involve checking for external damage only after the package has been opened.
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Jolts during transportation do not need to be considered if the weight stated on the delivery slip is followed.
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If severe damage occurs to a shipment, informing the manufacturer is recommended but not immediate.
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Only use lubricants and auxiliary materials approved by the manufacturer to avoid damage and malfunctions.
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It is acceptable to modify the product without any consultation with the manufacturer if you believe the modification is beneficial.
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Personal protective equipment should always be worn to minimize health risks, even if it appears to be undamaged.
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Spare parts that have not been approved by the manufacturer can be safely used as long as they fit the product.
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Safety markings on the product should remain visible and undamaged to ensure proper safety compliance.
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Close-fitting work clothing is recommended because it has a high tearing strength.
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Any auxiliary materials used in conjunction with the product can be from a third-party manufacturer without concern.
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It is crucial to observe the specified operating conditions and requirements at the installation location.
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The drive should be actuated while the on-load tap-changer is uncoupled.
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A minimum wait time of 60 seconds is required between trial tap-change operations.
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Trial tap-change operations should be carried out without manually turning the hand crank.
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It is important for the tap position indicator of the motor-drive unit to match the contact designation on the on-load tap-changer.
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Transporting the drive should be done using any available packaging material.
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The function of electrical and mechanical end stops must be checked in both end positions.
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The motor-drive unit must not be tested before the transformer is energized.
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Carrying out successive tap-change operations with short time intervals is acceptable.
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Inrush current impulses can never exceed the transformer rated current.
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Performing tap-change operations while inrush current is present is recommended.
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The motor protective switch tripping indicates a minor fault that can be ignored.
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The tap position indicator must be checked if there is no change in voltage from the transformer despite changing the motor-drive unit position.
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Contacting MR is necessary when the on-load tap-changer is sluggish.
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The diverter switch operation can occur without audible action.
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Asymmetrical current paths cannot occur with inrush current impulses.
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More serious problems with the on-load tap-changer do not require informing authorized personnel.
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The name plate of the on-load tap-changer is located on the top cover.
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The operating instructions for the VACUTAP® VT® were originally written in French.
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A failure to comply with safety instructions can lead to liability for compensation.
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The packaging of the on-load tap-changer ensures its protection during storage and transportation.
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The transformer ratio test should be performed before fitting the motor-drive unit.
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On-load tap-changers are primarily used to maintain a stable voltage level during load changes.
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Grounding the on-load tap-changer is performed during the commissioning process at the manufacturer's site.
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Fault elimination procedures are only relevant after the product has left the manufacturer’s site.
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The permissible ambient conditions for the on-load tap-changer include extreme temperatures that exceed manufacturer specifications.
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Personal protective equipment is listed under safety instructions within the documentation.
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Installation and commissioning instructions are only relevant for experienced technicians and not for general personnel.
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The fitting drive components section includes details on fitting the motor-drive unit and drive shaft.
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The technical data section provides information on the properties and specifications of the on-load tap-changer.
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The process of unpacking shipments does not require checking for transportation damages.
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What is a key factor in preventing accidents related to personal protective equipment?
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How should the work area be maintained to minimize the risk of accidents?
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Under what conditions may the product be operated safely?
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What must be avoided in areas where explosive risks are present?
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Why are safety markings such as warning signs essential?
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What is a common misconception about long hair in the workplace?
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What should individuals do before beginning any installation or maintenance work?
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What is a potential consequence of not following safety protocols during maintenance?
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What is the primary function of the bevel gear in the context of the drive shaft?
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Which component is positioned on the bevel gear's mounting arm?
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In the design of the on-load tap-changer, which of the following components directly pertains to the electrical conduction?
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Which of the following accurately describes the role of the insulating shaft in the tap-changer?
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What is the function of the threaded spindle in the design of an on-load tap-changer?
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Which element is crucial for the functioning of the on-load tap-changer during adjustments under load?
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What is the primary purpose of the insulating plate within the tap-changer system?
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Which assembly component could potentially lead to mechanical failure if improperly maintained?
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What is the proper course of action if a hand crank is difficult to move during operation?
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Which situation allows the use of a hand crank for operating the motor-drive unit?
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What should be done if there is uncertainty about the tap-changer's working condition?
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During an emergency operation, what is critical to observe?
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If a tap-change operation that has begun electrically is not completed, what should NOT be done?
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What is a defining characteristic of normal operation of the motor-drive unit?
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What is indicated by a fault in the motor-drive unit or tap-changer?
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What happens during a tap-change operation that is deemed emergency?
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What is the primary function of an on-load tap-changer?
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What is one precaution that must be taken to avoid function-related dangers with the product?
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What should be done to ensure proper installation of the insulating shafts?
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Why is reading the safety instructions vital when handling the product?
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What is indicated by the phrase 'state-of-the-art technology' in the context of the product?
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What role do safety markings play on the product?
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What potential consequences exist from improper use of the product?
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What should occur if the product demonstrates visible damage upon receipt?
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What is the maximum DC current that can be measured without interruption during the change of operating position?
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What is the rated short-time current for the VACUTAP® VT I 500?
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What must the measured current be during the change of operating position when it involves an interruption?
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What is the maximum rated peak withstand current for the on-load tap-changer?
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Which of the following statements is true regarding the operating limits of the on-load tap-changer?
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Ambient conditions must be adhered to for reliable and safe operation of the product.
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Only lubricants and auxiliary materials not approved by the manufacturer can lead to malfunctions.
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Personal protective equipment should be used regardless of its condition during work.
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Unauthorized changes to the product can eliminate the risk of personal injury and operational faults.
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Close-fitting work clothing should have a high tearing strength and protruding parts.
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It is advisable to contact the manufacturer for any spare parts to ensure safety and reliability.
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Safety markings on the product can be ignored as long as the product functions correctly.
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It is acceptable to wear personal protective equipment that appears undamaged but is not appropriate for the job.
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The drive shaft connects the motor-drive unit to the de-energized tap-changer.
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The bevel gear specifically serves to switch the tap settings off-load.
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The name plate is positioned on the active part of the transformer system.
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An insulating shaft can be categorized as a vertical drive shaft.
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The switch element is depicted as the seventh component in the detailed drawing of the on-load tap-changer.
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The main components of the on-load tap-changer are presented as eight distinct elements.
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The Bevel gear in the motor-drive unit functions to connect the insulating plate and the connection contact.
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The mounting bridge in the design of the on-load tap-changer corresponds to the fourth component.
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The hand crank must be turned only in one specific direction to complete the tap-change operation safely.
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After completing a tap-change operation, it's required to keep the protective housing door open to ensure proper ventilation.
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The motor protective switch Q1 must be switched on after removing the hand crank from the tap changer.
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Damage to the on-load tap-changer can occur if the tap-change operation does not return to its mid-position correctly.
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The hand crank interlock switch interrupts only the control circuit during the operation of the motor-drive unit.
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Safety glasses protect the eyes from flying parts and splashing liquids.
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A hard hat is primarily used to protect the wearer from electrical hazards.
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An electrically skilled person does not need any special training for the working environment.
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Protective gloves are solely used to guard against mechanical hazards.
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Only trained and authorized persons may select the sling gear and secure the load.
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Hearing protection is recommended even if the environment appears quiet.
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The primary purpose of safety shoes is to protect against electrical hazards.
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The use of safety markings on a product is optional as long as the equipment is undamaged.
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The weight compensation spring must be replaced after 3 years or 100,000 tap-change operations, whichever comes first.
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Cleaning insulating plates and shafts should be performed with a wet cloth to ensure thorough dirt removal.
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After every 100,000 tap-change operations, the maintenance performed includes replacing both plug blocks.
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Trial tap-change operations should be conducted twice within the regulating range to ensure proper functioning.
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The maintenance plan indicates that used grease should be removed from eight specific parts including the movable output terminal.
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Lubricating parts with ISOFLEX TOPAS NCA 5051 is optional and does not impact the function of the transformer.
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Insulating shafts and plates require cleaning once a year as part of the maintenance protocol.
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The first maintenance schedule occurs after a minimum of 2 years or upon completion of 150,000 tap-change operations.
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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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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.
