Electrical Relay Safety and Specifications
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Questions and Answers

Which component of the protective relay functions as a reset mechanism?

  • Potential tie-in
  • Pressure equalization element
  • OPERATION (reset) test button (correct)
  • Cable gland

    • What purpose does the DW 2000 pressure monitoring device serve?

  • It monitors temperature levels.
  • It enhances electrical voltage stability.
  • It protects the on-load tap-changer from impermissible pressure increases. (correct)
  • It insulates the protective relay.

    • What is indicated by the safety marking that says 'Warning of dangerous electrical voltage'?

  • The device is designed to handle low voltage.
  • Users should handle the device with care to avoid shocks. (correct)
  • The voltage range is safe for general public access.
  • Normal operation does not involve electrical currents.

    • Which part of the protective relay is used for conducting electrical potential?

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

    What type of adapter is present in the protective relays RS 2003 and RS 2004?

    <p>1/2&quot;-14 NPT adapter</p> Signup and view all the answers

    Which component provides a means to assemble and secure the protective cover?

    <p>Slotted head screw for protective cover</p> Signup and view all the answers

    Where is the nameplate located on the protective relay?

    <p>On the back of the protective relay</p> Signup and view all the answers

    What is the function of the 'OFF (test tripping)' test button?

    <p>To conduct a test that deactivates the relay temporarily</p> Signup and view all the answers

    What precaution should be taken when transporting the crate?

    <p>Transport the crate only when it is closed</p> Signup and view all the answers

    What is a potential consequence of a crate tipping over during transport?

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

    Which individuals are allowed to select the sling gear and secure the load?

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

    What should be checked by the recipient before accepting the shipment?

    <p>Completeness based on the delivery slip and external damage</p> Signup and view all the answers

    What is the recommended action if visible transport damage is found upon receipt?

    <p>Record the damage and have it countersigned by the carrier</p> Signup and view all the answers

    How should the recipient inspect the shipment after unloading?

    <p>When the crate can be accessed from all sides</p> Signup and view all the answers

    What risks should be anticipated during transportation aside from oscillation stress?

    <p>Jolts and sudden impacts</p> Signup and view all the answers

    What is the role of the securing material in the crate during transport?

    <p>It must not be removed during transport</p> Signup and view all the answers

    What is the primary reason for not opening the sealed packaging until just before installation?

    <p>To avoid damage from tipping</p> Signup and view all the answers

    Which safety precaution should be taken during tap-change operations of the on-load tap-changer?

    <p>Maintain a distance of at least 1 m</p> Signup and view all the answers

    What must be checked after unpacking the packaged goods?

    <p>The completeness of the accessories kit</p> Signup and view all the answers

    Which issue can arise from ineffectively sealed packaging during transport?

    <p>Damage to packaged goods</p> Signup and view all the answers

    What component is necessary for fitting the on-load tap-changer head on the transformer cover?

    <p>Mounting flange</p> Signup and view all the answers

    What hazardous condition should be avoided when working on the tap-changer?

    <p>Moving components during operation</p> Signup and view all the answers

    What is the first step in preparing for the installation of the on-load tap-changer?

    <p>Fitting the mounting flange on the transformer cover</p> Signup and view all the answers

    Which of the following actions should NOT be performed during tap-change operations?

    <p>Reach into the selector area</p> Signup and view all the answers

    What should be done to prevent damage to the on-load tap-changer during assembly?

    <p>Carefully comply with the specified tightening torque.</p> Signup and view all the answers

    What is the consequence of removing the blocking strip from the selector coupling?

    <p>The selector coupling may no longer be turned.</p> Signup and view all the answers

    What is a critical safety measure when positioning the selector?

    <p>Secure the selector against tipping on a level surface.</p> Signup and view all the answers

    What action needs to be taken regarding the support and support ring of the change-over selector?

    <p>They must be removed before finalizing the assembly.</p> Signup and view all the answers

    How much does the selector weigh at maximum?

    <p>465 kg</p> Signup and view all the answers

    What packaging material should be removed from the selector before installation?

    <p>Red-colored packaging material.</p> Signup and view all the answers

    What is the purpose of securing screw connections during assembly?

    <p>To enhance stability and prevent damage.</p> Signup and view all the answers

    Which action is NOT recommended during the assembly of the tap-selector?

    <p>Tighten screws without verifying the torque setting.</p> Signup and view all the answers

    What is the purpose of the tracing template when fitting stud bolts to the mounting flange?

    <p>To align the stud bolts correctly with markings</p> Signup and view all the answers

    What must be ensured when fitting the mounting flange on the transformer cover?

    <p>The sealing face must make complete contact and not be damaged</p> Signup and view all the answers

    Why is it important to place the oil compartment on a level surface during installation?

    <p>To prevent tipping that may lead to injuries or property damage</p> Signup and view all the answers

    What is the significance of cleaning sealing surfaces before installation?

    <p>To ensure proper adhesion and sealing of gaskets</p> Signup and view all the answers

    What should be done with the red-colored packaging material before installing the oil compartment?

    <p>It should be removed to prepare the compartment for use</p> Signup and view all the answers

    How can a tracing template be obtained for the initial installation of the on-load tap-changer?

    <p>It is available free of charge upon request</p> Signup and view all the answers

    What is one major risk of not securing the oil compartment properly during installation?

    <p>There is a risk of it tipping over causing injuries or damages</p> Signup and view all the answers

    What is the primary concern regarding the sealing face of the mounting flange?

    <p>It must make complete contact and remain undamaged</p> Signup and view all the answers

    Embedded warnings apply to individual information units rather than entire sections.

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

    The signal word 'NOTICE' indicates a hazardous situation that must be addressed immediately to prevent death.

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

    The term 'DANGER' signals a hazardous situation that can lead to minor injuries.

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

    Pictograms provide visual warnings of various dangers associated with the equipment.

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

    Caution indicates a situation that could result in damage to property.

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

    The instructional system in this technical file includes both single-step and multi-step instructions.

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

    Transporting the crate while it is open poses no risk of damage.

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

    The warning 'danger of tipping' is a correct interpretation of a pictogram used for warnings.

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

    Only trained and authorized individuals should secure the load during transportation.

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

    Warning of combustible substances is captured by the signal word 'WARNING'.

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

    Jolts and oscillation stress are not factors to consider during transportation.

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

    The recipient must check for completeness based on the delivery slip before signing for the shipment.

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

    Visible damage must be documented immediately after finding it upon receipt of the shipment.

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

    Securing materials inside the crate can be removed during transportation to save space.

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

    Damage is not expected if a crate falls from a certain height, regardless of its weight.

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

    The checks for external damage should take place after unloading the crate.

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

    Pipe connection S is used for connecting the on-load tap-changer oil conservator.

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

    The protective relay is activated when the flow speed from the on-load tap-changer head exceeds a specific limit due to a fault.

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

    Pipe connection E2 can be used to equalize pressure between the transformer tank and the oil compartment.

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

    The nameplate with the serial number is located on the body of the on-load tap-changer.

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

    Pipe connection R must be interchanged with pipe connection Q for proper functionality.

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

    The insulating fluid causes the flap valve in the protective relay to tip over into the OFF position when flow speed is exceeded.

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

    The protective relay's operation is not affected by the flow of insulating fluid.

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

    The protective relay does not have any protective devices integrated into its design.

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

    Immediately notify the manufacturer and the relevant insurance company if there is severe damage or total loss.

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

    It is acceptable to modify the condition of the shipment after identifying any damage.

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

    Photographing damaged packaging and goods is unnecessary for any claim for damages.

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

    Hidden damage can be claimed by notifying the responsible party as soon as the damage is discovered.

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

    It is sufficient to check sealed packaging immediately after delivery only if the product appears to be intact.

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

    Insurance claims for hidden damage can only succeed if relevant provisions are included in the insurance terms.

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

    Retaining packaging material is important until an inspection decision has been made by the concerned parties.

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

    The party responsible for damages should not be contacted until a damage report is prepared.

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

    A mounting flange for the on-load tap-changer is always provided by the manufacturer.

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

    It is safe to reach into the selector during a tap-change operation as long as you are careful.

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

    The packaged goods should be unpacked immediately upon arrival to check their condition.

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

    During tap-change operations, the change-over selector is completely accessible for repairs.

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

    It is necessary to perform checks on the completeness of the accessories kit using the delivery slip after unpacking.

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

    The potential connection unit poses a minimal risk during installation.

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

    Serious injuries can occur if the packaged goods are not placed upright during transport.

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

    Transport damage can occur even with effectively sealed packaging.

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

    What must be ensured about personnel responsible for assembly and maintenance?

    <p>They possess the required technical qualifications and are familiar with applicable standards.</p> Signup and view all the answers

    What type of modifications are recommended for the product according to the guidelines?

    <p>Modifications made after consultation with the manufacturer.</p> Signup and view all the answers

    What could unauthorized spare parts lead to in the context of the product?

    <p>Physical injury and product malfunctions.</p> Signup and view all the answers

    What distinguishes an electrically skilled person from an electrically trained person?

    <p>An electrically skilled person has a broader technical qualification and independent decision-making capabilities.</p> Signup and view all the answers

    What is the status of lubricants and auxiliary materials not approved by the manufacturer?

    <p>They may cause operational faults and should not be used.</p> Signup and view all the answers

    What role does an electrically trained person have in relation to the work environment?

    <p>They receive instructions and handle tasks under guidance for safety.</p> Signup and view all the answers

    What is a potential risk of modifying a product without consulting the manufacturer?

    <p>It could lead to personal injury and material damage.</p> Signup and view all the answers

    What qualifications must an electrically skilled person meet?

    <p>They must satisfy all statutory regulations for accident prevention.</p> Signup and view all the answers

    What should be done if the serial numbers of the on-load tap-changer and its accessories do not match?

    <p>Return the items and request a replacement.</p> Signup and view all the answers

    Under which electrical conditions can the on-load tap-changer operate safely?

    <p>With sinusoidal 50/60 Hz alternating current.</p> Signup and view all the answers

    What is a permissible short-term variation for the rated step voltage Uir?

    <p>Up to 10% increase.</p> Signup and view all the answers

    Who is authorized to perform necessary work on the on-load tap-changer?

    <p>Trained and qualified personnel only.</p> Signup and view all the answers

    What is critical to check regarding the coupling components during assembly?

    <p>The compatibility of the coupling components.</p> Signup and view all the answers

    What tool usage is discouraged with the tap-changer equipment?

    <p>Using equipment outside the scope of delivery.</p> Signup and view all the answers

    What must be ensured about the technical specifications during operation?

    <p>They should be strictly followed.</p> Signup and view all the answers

    What should be done if an unapproved electrical component is discovered in the on-load tap-changer setup?

    <p>Remove it immediately and follow correct procedures.</p> Signup and view all the answers

    What mechanism allows on-load tap-changers to adjust the transmission ratio without interrupting load flow?

    <p>Motor-drive unit</p> Signup and view all the answers

    Which personal protective equipment is specifically designed to protect the eyes from flying parts and splashing liquids?

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

    What is the primary purpose of a hard hat in personal protective equipment?

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

    What aspect of on-load tap-changers allows them to compensate for fluctuations in the power transmission grid?

    <p>Continuous adjustment capability</p> Signup and view all the answers

    Which type of safety equipment is essential for protecting against thermal hazards?

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

    What control element changes the on-load tap-changer’s operating position in response to the voltage regulator?

    <p>Motor-drive unit</p> Signup and view all the answers

    Which protective equipment is necessary to prevent hearing damage?

    <p>Hearing protection</p> Signup and view all the answers

    What must be done to ensure the oil compartment is securely fitted during installation of the on-load tap-changer?

    <p>Ensure it is on a level surface</p> Signup and view all the answers

    What is the primary function of the on-load tap-changer in a transformer system?

    <p>To adjust the voltage levels without interrupting the power supply</p> Signup and view all the answers

    Which component is responsible for selecting specific taps of the transformer?

    <p>Tap selector</p> Signup and view all the answers

    Which of the following is NOT a part of the on-load tap-changer head assembly?

    <p>Thermal expansion valve</p> Signup and view all the answers

    What is the purpose of the oil compartment in the on-load tap-changer assembly?

    <p>To act as a cooling medium and insulator</p> Signup and view all the answers

    Which function does the change-over selector perform in the on-load tap-changer system?

    <p>It selects between different transformer taps</p> Signup and view all the answers

    During the assembly of the tap-selector, which action is most critical for ensuring its functionality?

    <p>Securing the screw connections properly</p> Signup and view all the answers

    What is indicated by the presence of four pipe connections on the on-load tap-changer head?

    <p>Multiple functionality for cooling and oil circulation</p> Signup and view all the answers

    Which component is primarily responsible for converting mechanical movements to electrical signaling in the on-load tap-changer?

    <p>Motor-drive unit</p> Signup and view all the answers

    What is the consequence of operating the motor-drive unit electrically before disconnecting the transformer?

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

    What action should be taken if the hand crank becomes difficult to move during operation?

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

    What must be ensured regarding the oil compartment during commissioning of the transformer?

    <p>It should be completely filled with insulation fluid</p> Signup and view all the answers

    What is a safe practice regarding tap-change operations after inrush current impulses?

    <p>Wait until inrush current impulses have subsided</p> Signup and view all the answers

    During commissioning, how should the signaling contact for the oil conservator be configured?

    <p>Looped into the tripping circuit of the transformer</p> Signup and view all the answers

    What precaution should be followed when performing a tap-change operation under load conditions?

    <p>Make sure inrush current is adequately managed</p> Signup and view all the answers

    What risk is associated with leaving the stop-cocks between the on-load tap-changer and oil conservator closed?

    <p>Insufficient oil supply during operation</p> Signup and view all the answers

    Why should tap-change operations not be interrupted after initiating electrically?

    <p>To prevent failure of the tap-changer mechanism</p> Signup and view all the answers

    The technical file is intended for general use by anyone.

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

    Warning relating to sections applies only to specific paragraphs within the technical file.

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

    The supporting documents include connection diagrams and routine test reports.

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

    The notation conventions indicate that embedded warnings are applicable to an entire section.

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

    One of the supporting documents required for completeness is the order confirmation.

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

    Warnings are displayed in a specific format that includes a type of danger, source of danger, and action steps.

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

    It is recommended to keep the technical file and supporting documents easily accessible at all times.

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

    Maschinenfabrik Reinhausen GmbH is the manufacturer identified in the technical file.

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

    The flap valve must be in the STANDBY position for the protective relay to function correctly.

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

    The transformer's circuit breaker can remain closed during testing of the pressure monitoring device.

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

    The sensor on the snap-action switch is activated only when the transformer is in operation.

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

    Grounding the transformer must be performed on the high-voltage side only during the pressure monitoring device check.

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

    The protective tests require leaving the transformer's danger zone during each step.

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

    Resetting the pressure monitoring device involves activating the snap-action switch to its OFF position.

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

    The circuit breaker will not close if the sensor is activated for a passive protection test.

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

    Once the cover cap is secured, the transformer can immediately be powered on.

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

    The pipe connection Q can only be interchanged with pipe connection R.

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

    Pipe connection S is solely used for venting purposes and cannot be connected to a drain valve.

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

    The pipe connection E2 is intended for direct attachment to the oil conservator of the tap-changer.

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

    Each pipe connection is permanently fixed and cannot be swiveled after installation.

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

    Pipe connection R includes installation for both the protective relay and the oil conservator.

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

    The connection cables for the tap-change supervisory device are routed through pipe connection S.

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

    Pipe connection Q is covered with a blank cover to prevent any connections.

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

    If the on-load tap-changer is fitted with an oil suction pipe, it cannot be emptied via pipe connection S.

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

    The pressure monitoring device activates a sensor on the snap-action switch to trigger the circuit breaker when static and dynamic pressures exceed a certain threshold.

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

    Low-energy interference will cause the pressure monitoring device to trip because it is sensitive to all changes in pressure.

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

    The tripping pressure set in the pressure monitoring device can be adjusted by the user to customize its sensitivity.

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

    The pressure monitoring device uses a spring and a corrugated tube mechanism to measure both static and dynamic pressures in the oil compartment.

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

    After the pressure monitoring device is tripped, resetting the sensor on the snap-action switch must be done automatically.

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

    The protective relay is designed to respond to large pressure increases more swiftly than the pressure monitoring device.

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

    The markings on the product include instructions to read the documentation for safety compliance.

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

    The warning of dangerous electrical voltage is one of the safety markings associated with the product.

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

    The motor-drive unit can still be electrically actuated after the tap-change supervisory device is activated.

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

    Tripping of the pressure relief device does not require checking the on-load tap-changer.

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

    One must take measurements on the transformer after tripping of the pressure monitoring device.

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

    It is permissible to manually operate the motor-drive unit via the hand crank when the transformer is switched on.

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

    The activation of tap-change supervisory device indicates that the transformer must be taken out of service.

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

    Contacting MR is necessary only when checking the pressure monitoring device, not for the tap-changer.

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

    Tripping the protective relay requires the transformer to be re-commissioned after diagnosis.

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

    The pressure relief device does not have any connection to the transformer checks.

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

    Study Notes

    Product Overview

    • VACUTAP® VR I HD is a type of on-load tap-changer designed for transformer applications.
    • The protective relay RS 2001 features multiple components including a gasket, terminal box cover, operation/reset test buttons, and a pressure equalization element.
    • Variants RS 2003 and RS 2004 come equipped with a 1/2"-14NPT adapter instead of a cable gland.

    Nameplate and Safety Markings

    • The nameplate is located on the back of the protective relay, providing essential information about the device.
    • Safety markings include:
      • Protective conductor connection
      • Warning of dangerous electrical voltage
      • Instruction to read provided documentation.

    Pressure Monitoring Device

    • The DW 2000 pressure monitoring device ensures safety by protecting the on-load tap-changer from excessive pressure.

    Handling and Transportation

    • Strict precautions are necessary during transportation to prevent tipping and falling loads:
      • Keep crates closed during transport.
      • Ensure loads are secured and handled by qualified personnel.
    • Recipients must check shipments for completeness and external damage upon delivery.
    • Any visible transport damage must be documented immediately and countersigned by the carrier.

    Unpacking Procedures

    • Packages should be transported to the installation site without opening them until needed, avoiding risk to the contents.
    • Unpack goods carefully while ensuring they remain stable to prevent accidents.

    Mounting and Installation

    • Safety measures are critical during installation to avoid injuries from moving components during tap-change operations.
    • A mounting flange must be fitted on the transformer cover to secure the on-load tap-changer.
    • Customer-produced mounting flanges must comply with specific installation drawings for proper fit.
    • Proper sealing and alignment of components is necessary to ensure a secure installation.

    Connection and Fastening

    • The oil compartment must be placed securely to prevent tipping during installation.
    • It is crucial to follow specified tightening torque and secure screw connections to avoid damage to the on-load tap-changer.
    • Removal of packaging materials and ensuring proper positioning of components is essential before installation.

    Selector and Fastening Procedures

    • The selector, which weighs up to 465 kg, needs to be positioned on a level surface and secured against tipping.
    • The blocking strip should be removed cautiously from the selector coupling as it prevents accidental movement of the selector.

    Embedded Warnings and Signal Words

    • Embedded warnings provide specific alerts within sections, focusing on smaller information units.
    • Warning format includes "DANGER!", giving instructions to avoid potentially life-threatening situations.
    • Signal words with definitions:
      • DANGER: Imminent risk of death or serious injury.
      • WARNING: Significant risk of death or serious injury.
      • CAUTION: Risk of minor or moderate injury.
      • NOTICE: Preventative measures to protect property.

    Pictograms and Their Meanings

    • Pictograms are visual symbols warning of hazards:
      • Indicates danger points.
      • Warns about dangerous electrical voltages.
      • Alerts to combustible substances.
      • Signifies risk of tipping.
      • Represents danger of crushing.

    Information and Instruction Systems

    • Information systems are designed to enhance understanding of procedures, detail important points.
    • Instruction systems provide single-step and multi-step processes for equipment usage.
    • Pipe connections (S, R, E2) facilitate functions such as oil suction, protective relay attachment, and pressure equalization in transformers.

    Protective Devices and Functions

    • The on-load tap-changer includes protective relays integrated into the circuit breaker tripping circuit.
    • Relays activate if flow speed exceeds limits, triggering circuit breaker trips to de-energize the transformer.

    Transportation and Handling Precautions

    • Strict instructions to prevent hazards during transport:
      • Secure crate before transport; do not open or modify packaging.
      • Only authorized personnel should handle and secure loads.
      • Inspect shipments for completeness and damage upon receipt.
      • Report visible transport damage immediately with proper documentation.
      • Address hidden damage proactively with responsible parties to ensure claims.

    Unpacking and Installation Guidelines

    • Maintain packaging until immediate installation; do not open prematurely.
    • Ensure safety during unpacking to prevent tipping and injury.
    • Check all components against the delivery slip for completeness.
    • Clear warning against reaching into machinery during operation to avoid crushing injuries.

    Product Lifecycle and Usage Guidelines

    • Applies from delivery to disposal of the product.
    • Must use specified transformer/motor-drive unit as ordered.
    • Serial numbers of on-load tap-changer and accessories must match if supplied together.
    • Check nameplate for applicable standards and year of issue.
    • Operate per technical file, delivery conditions, and technical data.
    • Only qualified personnel should perform necessary work.
    • Use only specified equipment and tools for intended purposes.
    • Not compatible with an oil filter unit.

    Operating Conditions and Safety

    • Designed for sinusoidal 50/60 Hz AC; can switch 2 times rated through-current at rated step voltage.
    • Temporary 10% overstep of rated voltage Uir is acceptable without exceeding rated step capacity PStN.
    • Use only manufacturer-approved lubricants and materials; consult manufacturer for modifications.
    • Unauthorized changes may lead to personal injury and operational issues.

    Personnel Qualifications

    • Assembly and maintenance must be conducted by qualified personnel.
    • An electrically skilled person has the requisite technical knowledge and experience.
    • Recognizes potential dangers and avoids them, able to work with electrical systems, familiar with safety regulations.
    • An electrically trained person receives guidance from a skilled person, focusing on safety and task understanding.

    Personal Protective Equipment (PPE)

    • Safety shoes prevent slipping and injuries from falling objects.
    • Safety glasses protect against flying parts and splashes.
    • Visors guard the face from hazardous substances.
    • Hard hats shield against falling materials.
    • Hearing protection avoids noise-induced damage.
    • Protective gloves defend against mechanical, thermal, and electrical hazards.

    On-load Tap-changer Function and Components

    • Used to adjust transformer transmission ratios without disrupting load flow; compensates for voltage fluctuations.
    • Connected to transformer’s active part; motor-drive unit receives control signals for operation adjustment.
    • Key components include transformer tank, motor-drive unit, drive shafts, protective relays, and oil conservators.

    On-load Tap-changer Setup

    • Features pipe connections for various functions.
    • Commissioning requires monitoring oil fill levels and ensuring protective devices are operational.
    • Ensure stop-cocks are open between on-load tap-changer and oil conservator before powering on.

    Operational Warnings

    • Inrush currents can exceed rated transformer currents; wait for currents to stabilize before making tap changes.
    • Never use the hand crank on the motor-drive unit if transformer may contain faults; de-energize first.
    • Do not complete electric tap-change operations with a hand crank if not properly concluded.

    Additional Considerations

    • Maintenance and inspection must follow all manufacturer recommendations to ensure safety and functionality.
    • Spare parts must be approved by Maschinenfabrik Reinhausen GmbH to prevent malfunctions or injuries.

    Manufacturer Information

    • Maschinenfabrik Reinhausen GmbH located at Falkensteinstraße 8, Regensburg, Germany.
    • Contact through phone: (+49) 9 41/40 90-0 or email: [email protected].
    • Availability of additional product information and technical files upon request.

    Technical File Overview

    • Designed for specially trained and authorized personnel.
    • Contains safety instructions, general product information, and installation guidance.
    • Incomplete without accompanying supporting documents such as unpacking instructions, routine test reports, and order confirmations.

    Safekeeping Instructions

    • Technical files and supporting documents must be readily accessible for future reference.

    Safety Notation Conventions

    • Warnings indicate dangers and necessary actions, organized by section.
    • Embedded warnings address specific parts within sections.

    Product Description

    • Features pipe connections (R, Q, S, E2) with specific functions such as venting and drainage.
    • Connection Q: Blank cover; can be swapped with connection R for supervisory device cables.
    • Connection S: Includes a vent screw, allows for complete draining when connected to a drain valve.
    • Connection R: Links to the protective relay and on-load tap-changer oil conservator.
    • Connection E2: Sealed with a blank cover; can connect to Buchholz relay if needed.

    Safety Markings

    • Product includes markings indicating:
      • Protective conductor connection.
      • Warning of dangerous electrical voltage.
      • Instruction to read relevant documentation.

    Pressure Monitoring Device (DW)

    • Protects the on-load tap-changer from unauthorized pressure increases.
    • Comprised of a corrugated tube and spring mechanism linked to a sensor for tripping.
    • The sensor activates, de-energizing the transformer if high pressure is detected.
    • Resetting the sensor requires manual intervention after tripping.
    • The device remains impervious to low-energy interference.

    Checking Procedures

    • Before commissioning, ensure protective relay and pressure monitoring device functions.
    • Includes grounding the transformer, ensuring de-energized status, and valve positioning.
    • Tests confirm that circuit breakers remain open, ensuring active and passive protection.

    Fault Elimination

    • Procedures established for tripping of protective and pressure relief devices.
    • Recommendations to check on-load tap-changer and transformer for faults as needed.
    • Manual operation of the motor-drive unit is prohibited during supervisory device activation.

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    Related Documents

    VACUTAP® VR I HD Installation and Commissioning Instructions PDF
    VACUTAP® VR I HD Operating Instructions PDF

    Description

    Test your knowledge on the VACUTAP® VR I HD and its associated protective relay RS 2001. This quiz covers essential safety markings, handling precautions, and specifications related to transformer applications. Ideal for electrical engineers and technicians.

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