Electrical Safety Training
153 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is a primary responsibility of an electrically skilled person?

  • To operate electrical systems without supervision.
  • To identify potential dangers and avoid them. (correct)
  • To perform maintenance on all types of machinery.
  • To provide training for all staff members.

    • In what capacity does an electrically trained person operate?

  • By following general safety protocols only.
  • Without needing any training or supervision.
  • Under the guidance and supervision of an electrically skilled person. (correct)
  • Independently with no guidance.

    • What ensures that maintenance and repairs are performed correctly?

  • Electricians who are certified at any institution.
  • Any person as long as they have basic knowledge.
  • An authorized technician certified by the operating company.
  • The Technical Service department of Maschinenfabrik Reinhausen GmbH. (correct)

    • What is a requirement for personal protective equipment used during work?

    <p>It must always be worn and should never be damaged.</p> Signup and view all the answers

    Who is responsible for training operators on specific tasks and dangers?

    <p>The operating company.</p> Signup and view all the answers

    What distinguishes authorized personnel from electrically skilled or trained persons?

    <p>They have received specialized training from Maschinenfabrik Reinhausen GmbH.</p> Signup and view all the answers

    What aspect is NOT included in the responsibilities of an electrically skilled person?

    <p>Independent operation without supervision.</p> Signup and view all the answers

    What does an electrically trained person need to know before undertaking tasks?

    <p>The protective devices and safety measures in place.</p> Signup and view all the answers

    What is the correct procedure for aligning the on-load tap-changer head cover?

    <p>Align the red triangular markings on the head and cover.</p> Signup and view all the answers

    Which method is NOT mentioned as a means to dry the on-load tap-changer in the transformer tank?

    <p>Heat-drying</p> Signup and view all the answers

    Before drying the on-load tap-changer in the transformer tank, what must be done first?

    <p>Fully assemble the transformer first.</p> Signup and view all the answers

    What is the maximum allowable temperature while drying the on-load tap-changer after heating at atmospheric pressure?

    <p>110 °C</p> Signup and view all the answers

    What is the primary purpose of drying the on-load tap-changer?

    <p>To ensure dielectric values are maintained.</p> Signup and view all the answers

    Which step should be taken immediately after ensuring that the o-ring is properly positioned?

    <p>Secure the on-load tap-changer head cover.</p> Signup and view all the answers

    What occurs after the on-load tap-changer head cover is screwed onto the head?

    <p>No further assembly is needed.</p> Signup and view all the answers

    What could potentially happen if the o-ring is missing or damaged during the mounting of the head cover?

    <p>Insulating fluid loss</p> Signup and view all the answers

    What is the required duration for vacuum-drying the on-load tap-changer?

    <p>50 hours</p> Signup and view all the answers

    How should the temperature increase be managed during the initial heating phase in air?

    <p>By approximately 10 °C/h</p> Signup and view all the answers

    Which of the following accessories should not be dried along with the on-load tap-changer?

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

    What residual pressure is allowed for the on-load tap-changer after vacuum drying?

    <p>10-3 bar</p> Signup and view all the answers

    What should be avoided to prevent damage while drying the on-load tap-changer accessories?

    <p>Excessive heat above 125 °C</p> Signup and view all the answers

    What must be ensured when closing the screening caps?

    <p>The screening caps are securely seated.</p> Signup and view all the answers

    What components are needed for the on-load tap-changer take-off lead connection directly on the oil compartment?

    <p>Cable shoe and screw.</p> Signup and view all the answers

    What is a necessary measure to ensure the screw connection does not loosen?

    <p>Using clamping washers.</p> Signup and view all the answers

    When connecting the take-off lead to the take-off ring, what must be maintained?

    <p>A minimum distance of 2 mm between the screw and the oil compartment.</p> Signup and view all the answers

    What type of connection method is used for the on-load tap-changer take-off lead?

    <p>Connecting via a cable shoe and screw.</p> Signup and view all the answers

    Which of the following statements is incorrect regarding the take-off lead connection on the oil compartment?

    <p>Fastening materials are included in the delivery.</p> Signup and view all the answers

    What is the purpose of using a cable shoe in the connection process?

    <p>To create a secure mechanical connection.</p> Signup and view all the answers

    What must be done before connecting the take-off lead to ensure safety?

    <p>Check that the screw is the correct length.</p> Signup and view all the answers

    What is the primary purpose of pipe connection R?

    <p>For attaching the protective relay and connecting the on-load tap-changer oil conservator</p> Signup and view all the answers

    How does pipe connection E2 function in relation to the transformer?

    <p>It provides a means for filling the transformer with insulating fluid</p> Signup and view all the answers

    Where is the nameplate with the serial number located?

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

    What triggers the protective relay in the on-load tap-changer system?

    <p>An excessive speed of flow from the tap-changer head to the oil conservator</p> Signup and view all the answers

    What is the role of the flap valve in the protective relay circuit?

    <p>To actuate the dry-reed magnetic switch when flow exceeds limits</p> Signup and view all the answers

    Which component is directly affected when the protective relay is tripped?

    <p>The circuit breakers connected to the relay</p> Signup and view all the answers

    Which of the following statements is true regarding the oil conservator's function?

    <p>It helps in pressure equalization during operation.</p> Signup and view all the answers

    Which feature is NOT associated with the protective relay system?

    <p>Monitoring fluid temperatures</p> Signup and view all the answers

    On-load tap-changers can adjust the transmission ratio of transformers while interrupting the load flow.

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

    The primary components delivered with the product include a motor-drive unit and technical files.

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

    Parts should be stored in a damp place until installation to ensure they are ready for use.

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

    The shipment's completeness should be checked against the shipping documents.

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

    The on-load tap-changer set can be provided with a standalone motor-drive unit.

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

    It is acceptable to remove the product from its protective wrapping at any time before installation.

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

    The protective devices are included in the scope of delivery along with the main components.

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

    The packaging protects the product only from dust, not moisture.

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

    The drying on-load tap-changer in autoclave occurs at 44 degrees.

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

    Filling the oil compartment of the on-load tap-changer is mentioned as a step that must occur at stage 63.

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

    Drying the on-load tap-changer in transformer tank has a specific procedure numbered 50.

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

    Performing DC resistance measurement on transformer is included only in section 5.3.

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

    The nameplate and serial number of the on-load tap-changer can be found in section 15.

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

    The protective devices related to the on-load tap-changer are discussed in section 16.

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

    The maximum allowable temperature during the drying of the on-load tap-changer is stipulated at 76 degrees.

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

    The appropriate use of safety measures in dealing with the on-load tap-changer is listed in section 2.1.

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

    There are nine fundamental safety instructions listed under safety guidelines.

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

    Transformers require a ratio test after drying only when specified in section 76.

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

    Pipe connection R can be interchanged with pipe connection Q.

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

    Pipe connection E2 has an opening that leads to the oil tank of the transformer.

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

    The primary function of the protective relay is to increase oil flow from the on-load tap-changer head.

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

    The flap valve in the protective relay circuit moves to the OFF position when actuated.

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

    The serial number is located on both the on-load tap-changer head cover and the selector.

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

    The oil conservator is primarily used to protect the transformer from overheating.

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

    Pipe connection E2 serves to equalize pressure between the transformer tank and oil compartment.

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

    The protective relay operates independently of the insulating fluid.

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

    V 1 must be less than or equal to 706 mm when an intermediate bearing is not used.

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

    When the maximum value of 2472 mm is exceeded, an intermediate bearing is required.

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

    A maximum permissible axial offset of 2° is allowed without an intermediate bearing.

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

    V 1 can be greater than 2472 mm without any restrictions.

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

    The configuration of the drive shaft is only applicable to models with a cardan joint.

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

    The selector's weight can exceed 200 kg.

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

    The blocking strip can be replaced after the selector coupling is turned.

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

    Incorrect tightening torques can lead to damage of the on-load tap-changer.

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

    The red-colored packaging material should be left on the selector during transportation.

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

    Screwing the selector onto the oil compartment is the final step in the process.

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

    Care must be taken to ensure that connection leads do not touch the oil compartment when lifting.

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

    Removing the red protective cap on the change-over selector should be done before fixing it to the oil compartment.

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

    Fastening materials should be kept inside the selector at all times.

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

    Which of the following actions is essential to prevent explosion risk when commissioning the transformer?

    <p>Keeping ignition sources away from the transformer</p> Signup and view all the answers

    What is the primary function of the drive shaft in relation to the tap-changer?

    <p>To facilitate a mechanical connection between the drive and the tap-changer.</p> Signup and view all the answers

    What consequence may arise from using unsuitable insulating fluids in the oil compartment?

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

    What safety device must be confirmed present on the on-load tap-changer head cover to avoid potential damage?

    <p>A pressure relief device</p> Signup and view all the answers

    Which component of the drive shaft changes the direction of motion?

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

    What is the main hazard related to overloading the on-load tap-changer?

    <p>Deflagration or explosion risks</p> Signup and view all the answers

    What configuration must be employed when the maximum axial offset exceeds 2472 mm?

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

    What is NOT a part of the drive shaft assembly?

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

    Which operational guideline should be strictly observed to prevent property damage when using the on-load tap-changer?

    <p>Maintaining operations only within permitted conditions</p> Signup and view all the answers

    What type of hoses and equipment should be used to minimize risks during a transformer oil filling process?

    <p>Conductive and grounded equipment</p> Signup and view all the answers

    How is the drive shaft primarily constructed?

    <p>A square tube with coupling brackets and bolts</p> Signup and view all the answers

    What is the purpose of the coupling brackets and bolts in the drive shaft?

    <p>To secure connections between shafts</p> Signup and view all the answers

    Why should electrical devices not be operated during the commission of the transformer?

    <p>They may create sparks that can ignite gases</p> Signup and view all the answers

    What is the likely outcome if adequate measures are not taken to prevent operations outside of permitted conditions?

    <p>Serious injuries and property damage</p> Signup and view all the answers

    Under what conditions is an intermediate bearing required in the configuration of the drive shaft?

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

    Which feature characterizes the design of the drive shaft without cardan joint and insulator?

    <p>Standard configuration with specific measurements</p> Signup and view all the answers

    What is the first step to ensure the transformer is safe for testing?

    <p>Ensure the transformer is de-energized</p> Signup and view all the answers

    Which sensor state indicates that the transformer is ready for the active protection test?

    <p>Sensor is in the OPERATION position</p> Signup and view all the answers

    When conducting the passive protection test, what must be ensured before closing the transformer's circuit breaker?

    <p>The transformer's circuit breaker is open</p> Signup and view all the answers

    What must be done immediately after activating the sensor on the snap-action switch during testing?

    <p>Leave the transformer's danger zone</p> Signup and view all the answers

    Which component is crucial for the operation of the on-load tap-changer during the protective relay testing?

    <p>Circuit breaker</p> Signup and view all the answers

    What condition must be met regarding the oil compartment before the transformer can safely be switched on?

    <p>The oil compartment must be completely filled</p> Signup and view all the answers

    What is the proper action to take following the activation of the sensor on the snap-action switch when the sensor is in the OFF position?

    <p>Leave the danger zone</p> Signup and view all the answers

    What is the purpose of ensuring that all stop-cocks between the on-load tap-changer and the oil conservator are open?

    <p>To facilitate proper oil circulation</p> Signup and view all the answers

    What specific maintenance interval should be observed for the replacement of the diverter switch insert?

    <p>3.6 million switching operations</p> Signup and view all the answers

    What is indicated on the label inside the TAPMOTION® ED motor-drive unit?

    <p>Maintenance intervals</p> Signup and view all the answers

    What serious consequence is mentioned if pending maintenance work is not carried out immediately?

    <p>Death or serious injury</p> Signup and view all the answers

    After how many switching operations should the motor-drive unit counter reading be inspected?

    <p>1.2 million switching operations</p> Signup and view all the answers

    Which of the following does NOT refer to a maintenance task outlined for the motor-drive unit?

    <p>Routine electrical component testing</p> Signup and view all the answers

    What is the maintenance interval specific to the replacement of the on-load tap-changer?

    <p>3.6 million switching operations</p> Signup and view all the answers

    In the context of the maintenance plan, what is identified for units without MR monitoring systems?

    <p>Maintenance tasks necessity</p> Signup and view all the answers

    What crucial information is emphasized regarding maintenance work?

    <p>Immediate action is required to prevent hazards</p> Signup and view all the answers

    What is indicated by inappropriate use in the context of safety for electrical equipment?

    <p>Operating equipment without proper training</p> Signup and view all the answers

    Which of the following represents a fundamental safety instruction for personnel working with electrical systems?

    <p>Only trained personnel can operate the equipment</p> Signup and view all the answers

    What is the primary purpose of the oil conservator in an on-load tap-changer system?

    <p>To minimize moisture ingress and help maintain oil levels</p> Signup and view all the answers

    What does section 7.3.4 suggest regarding filling the oil compartment?

    <p>Fresh insulating fluid must be compatible with existing fluid</p> Signup and view all the answers

    Which condition is critical for the installation height of the oil conservator?

    <p>Needs to comply with specific local regulations</p> Signup and view all the answers

    What is the significance of performing DC resistance measurement on a transformer?

    <p>To identify potential short circuits in the winding</p> Signup and view all the answers

    What should be observed when centering the on-load tap-changer and motor-drive unit?

    <p>Correct positioning according to manufacturer's guidelines</p> Signup and view all the answers

    What is a necessary measure that should be taken before connecting the take-off lead?

    <p>Verify that the insulation is intact</p> Signup and view all the answers

    An intermediate bearing is required when the length V 1 exceeds 2472 mm without any specific stipulations.

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

    The minimum configuration length V 1 must be at least 706 mm for a drive shaft without a cardan joint and with an insulator.

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

    The permissible axial offset for the drive shaft is set at 5°.

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

    Drive shafts with an insulator can only operate effectively at lengths V 1 greater than 706 mm.

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

    When the maximum permissible axial offset is adhered to, the use of an intermediate bearing is not mandatory, regardless of the length V 1.

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

    The static pressure on the pressure relief device is calculated based on the temperature difference between the oil level in the on-load tap-changer oil conservator and the pressure relief device.

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

    Re-commissioning the transformer can occur immediately after the cause of tripping has been identified, without any further checks.

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

    Grounding the transformer terminals is a safety measure that must be taken before performing maintenance.

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

    Working on energized components of the on-load tap-changer poses minimal risk if proper precautions are taken.

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

    Overvoltages must be registered to assess the condition of the transformer during tripping incidents.

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

    An energized transformer can be safely locked only from the high-voltage side to prevent unintentional restart.

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

    Dangers exist when servicing the on-load tap-changer, especially from electric shock hazards.

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

    The maintenance procedure includes ensuring that the on-load tap-changer is isolated from the transformer before any servicing.

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

    The pressure monitoring device DW 2000 protects the on-load tap-changer from impermissible temperature increases.

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

    The RS 2003 and RS 2004 protective relays utilize a 1/2"-14NPT adapter instead of a cable gland.

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

    The connection terminal is part number 8 in the protective relay components.

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

    The safety marking for reading the documentation is identified by the number 3.

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

    The protective relay features an 'OFF (test tripping)' button identified as number 5.

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

    A potential tie-in is labeled as part number 2 in the protective relay overview.

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

    The nameplate of the protective relay can be found on the front of the unit.

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

    The protective cover component is listed as number 9 in the protective relay assembly.

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

    Explosive gases in the oil compartment of the on-load tap-changer cannot deflagrate or explode.

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

    It's necessary to ensure the protective housing of the motor-drive unit is tightly closed to prevent damage due to condensate.

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

    Visual checks on the on-load tap-changer are performed weekly for efficiency reasons.

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

    Using electrical devices near the transformer is safe as long as they are not directly in contact with flammable liquids.

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

    The on-load tap-changer can be combined with usual checks on the transformer for effective monitoring while ensuring safety.

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

    Conductive and grounded hoses, pipes, and equipment are prohibited in the presence of flammable liquids.

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

    Immediate measures should be taken to manage the build-up of static charge around the transformer.

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

    An increase in temperature while drying the on-load tap-changer should be managed carefully to avoid damage.

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

    The manufacturer of the equipment is Maschinenfabrik Reinhausen GmbH, located in Regensburg, Germany.

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

    Supporting documents that are considered necessary include operation manuals, safety procedures, and packing slips.

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

    Warnings in the technical file are presented in a standard format that highlights the type of danger involved.

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

    The technical file can be considered complete if it includes only the unpacking instructions.

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

    It is important to keep the technical file and supporting documents stored away from easy access to ensure they remain safe.

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

    The technical file includes a section dedicated to notation conventions and hazard communication.

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

    A connection diagram is one of the documents that must be included in the supporting documents.

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

    Dimensional drawings are optional documents that can be omitted from the technical file.

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

    Study Notes

    Personnel Qualifications

    • Electrically skilled persons can independently identify and avoid potential dangers associated with electrical systems.
    • They can perform work on electrical systems and are specially trained for their work environment.
    • Must comply with statutory regulations for accident prevention.

    Electrically Trained Persons

    • Receive instruction and guidance from electrically skilled persons about tasks and potential dangers.
    • Work exclusively under the supervision of an electrically skilled person to ensure safety and correct handling.

    Operators

    • Use and operate products as per technical guidelines provided by the operating company.
    • Receive instruction and training on specific tasks and the risks of improper handling from the operating company.

    Technical Service Recommendations

    • Maintenance, repairs, and retrofitting should preferably be conducted by the Technical Service department to ensure proper execution.
    • If external personnel are used for maintenance, they must be trained and authorized by Maschinenfabrik Reinhausen GmbH.

    Authorized Personnel

    • Specially trained individuals by Maschinenfabrik Reinhausen GmbH are allowed to carry out specific maintenance tasks.

    Personal Protective Equipment (PPE)

    • Essential PPE must be worn during work to minimize health risks.
    • Damaged PPE should never be used.

    Pipe Connections

    • Pipe connection R: Used for attaching protective relay and connecting the on-load tap-changer oil conservator; interchangeable with pipe connection Q.
    • Pipe connection E2: Sealed with a blank cover, leads to the transformer oil tank, and assists in pressure equalization necessary for operations like drying and filling with insulating fluid.

    Nameplate and Serial Number

    • The nameplate, containing the serial number, is located on the on-load tap-changer head cover.
    • An additional serial number is also found on the selector component.

    Protective Devices

    • On-load tap-changers are equipped with protective relays connected to the circuit breaker tripping circuit.
    • A fault exceeding allowable flow speed from the tap-changer to the oil conservator trips the relay, de-energizing the transformer.

    Connecting On-load Tap-Changer Take-off Lead

    • Direct connection: Utilizes a cable shoe and screw, with measures to prevent loosening.
    • Take-off ring connection: Requires similar connection with a 2 mm minimum distance from the oil compartment.

    Drying Instructions

    • Damage can occur if drying methods are improperly applied to the on-load tap-changer accessories.
    • Drying steps involve controlled heating and vacuum drying to ensure dielectric values are maintained:
      • Increase temperature steadily and maintain a final maximum of 110 °C.
      • Conduct vacuum drying within specified temperature ranges for adequate durations.

    Securing On-load Tap-Changer Head Cover

    • Care must be taken to ensure sealing integrity to prevent insulating fluid escape.
    • Ensure proper alignment of markings on cover and use of undamaged o-rings during installation.

    Drying Methods in Transformer Tank

    • On-load tap-changer can be dried using vacuum-drying or vapor-phase drying.
    • Full assembly of the transformer is necessary before undertaking drying activities.

    Safety Considerations

    • Appropriate and inappropriate use outlined to ensure safe operation of on-load tap-changers.
    • Fundamental safety instructions are critical; personnel must be qualified and utilize personal protective equipment effectively.

    Product Description

    • On-load tap-changers facilitate adjustment of transformer transmission ratios without interrupting load flow.
    • Packaged to prevent moisture damage, deliveries usually include diverter switch, motor-drive unit, and technical files.

    Functionality of On-load Tap-changer

    • Pipe connections (R, E2, Q) serve specific roles, including connecting the protective relay and equalizing pressure in transformer systems.
    • Each pipe connection has distinct functionalities essential for maintenance and operation.

    Nameplate and Serial Identification

    • Nameplates and serial numbers are located on the on-load tap-changer head and selector for easy identification and tracking.

    Protective Devices

    • Equipped with protective relays that deactivate circuit breakers under fault conditions, safeguarding the system from damage.
    • Protective relay monitoring flow speed of insulating fluid ensures timely fault detection.

    Drive Shaft Design

    • Two models of drive shafts: one includes a cardan joint; the other is a special model without a joint, specific for particular geometrical constraints.
    • Minimum configurations and permissible axial offsets are defined to ensure stability and functionality during operation.

    Installation and Handling

    • Careful mounting procedures are vital; improper handling can damage components.
    • The selector weighs up to 165 kg, highlighting the importance of safety during installation to prevent equipment and personal injury.
    • Tightening torques during assembly must be adhered to prevent defects in the on-load tap-changer operation.

    Safety Considerations

    • Proper and inappropriate usage of equipment should be understood to prevent accidents.
    • Fundamental safety instructions are vital for personnel working with transformers.
    • Personnel qualification ensures that only trained individuals operate or maintain the equipment.
    • Use personal protective equipment (PPE) to reduce the risk of injury from hazardous materials.

    Product Description

    • The on-load tap-changer operates by changing tap positions under load without interrupting the circuit.
    • It includes several key components, notably the drive shaft, bevel gear, and protective devices.
    • Drive shafts have a vertical and horizontal orientation connecting different parts of the system, with coupling brackets and bolts.

    Drive Shaft Design

    • The drive shaft consists of a square tube, specifically designed without a cardan joint or insulator for standard applications.
    • An intermediate bearing is required if the permissible axial offset exceeds 2° and measures 2472 mm.
    • Components of the drive shaft include a bevel gear, telescopic protective tube, and protective cover.

    Commissioning Process

    • Ensure the specified insulating fluid, as noted in the manufacturer's guidelines, is used to fill the oil compartment to prevent damage.
    • A pressure relief device should be attached if the tap-changer head cover includes a flange.
    • The transformer must remain de-energized during testing to avoid risks.
    • Circuit breaker safety involves deactivating automatic fire extinguishing devices and ensuring that operating conditions follow safety protocols.

    Maintenance Protocol

    • Maintenance intervals are critical; stop-cocks need to be opened to connect the on-load tap-changer to the oil conservator effectively.
    • Contact with service centers is required after specific operation counts, such as 1.2 million or 3.6 million switching operations.
    • A label in the motor-drive unit specifies relevant maintenance intervals, enhancing proactive service schedules to prevent systemic failures.

    Explosion Hazards

    • Risks of explosion are prevalent during operation; hence, ignition sources must be monitored closely.
    • Overloading the on-load tap-changer can result in severe injuries and significant property damage.
    • It is essential to prevent operations that exceed the specified operating conditions.

    Manufacturer Information

    Completeness of Technical File

    • Technical file is incomplete without supporting documents:
      • Unpacking instructions
      • Supplement
      • Routine test report
      • Connection diagrams
      • Dimensional drawings
      • Order confirmation

    Safekeeping

    • Maintain the technical file and supporting documents accessible for future use.

    Notation Conventions

    • Warnings are displayed prominently with the format:
      • WARNING: Type of danger!

    Product Overview

    • Protective relay RS 2001 includes key components:
      • Gasket, terminal box cover, operation test button, test tripping test button, cable gland, connection terminal.
    • RS 2003 and RS 2004 variants have a 1/2"-14NPT adapter instead of cable gland.

    Safety Markings

    • Safety markings include:
      • Protective conductor connection
      • Warning of dangerous electrical voltage
      • Instruction to read documentation

    Pressure Monitoring Device (DW 2000)

    • Protects on-load tap-changer from hazardous pressure increases, enhancing transformer safety.
    • Dimensions for configurations indicate maximum permissible axial offset requirements.

    Maintenance and Safety Precautions

    • Electrical hazards:
      • Always de-energize the transformer before maintenance to prevent electric shock.
      • Lock transformer to prevent accidental restart and ensure grounding of all terminals.
    • Risk of explosion from explosive gases in oil compartments requires avoidance of ignition sources during maintenance.
    • Protect motor-drive unit's housing from condensate damage; utilize desiccants if necessary.

    Inspection Protocol

    • Visual inspections and monitoring of insulating fluid quality for on-load tap-changer and motor-drive unit should be conducted.
    • Inspections can be integrated with routine transformer checks for efficiency.

    Re-commissioning Process

    • Confirm resolution of issues causing pressure monitoring device tripping before re-commissioning the transformer.
    • Ensure operational positioning of the sensor prior to commissioning.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    VACUTAP® VM® On-Load Tap-Changer Installation & Commissioning Instructions PDF
    VACUTAP® VM® On-Load Tap-Changer Installation and Commissioning Instructions PDF
    VACUTAP® VM® On-load tap-changer Operating Instructions PDF
    VACUTAP® VM® On-load tap-changer Operating Instructions PDF

    Description

    This quiz assesses the knowledge of electrical safety protocols and the competencies required for working safely in electrical environments. It covers identifying hazards, adhering to statutory regulations, and understanding safety measures related to electrical systems.

    More Like This

    Electrical Safety Training Requirements
    11 questions

    Electrical Safety Training Requirements

    ContrastyErudition avatar
    ContrastyErudition
    Electrical Hazard Protective Equipment
    13 questions

    Electrical Hazard Protective Equipment

    ContrastyErudition avatar
    ContrastyErudition
    Energized Electrical Work Permit Conditions
    8 questions

    Energized Electrical Work Permit Conditions

    ContrastyErudition avatar
    ContrastyErudition
    Electrical Safety Fundamentals
    8 questions

    Electrical Safety Fundamentals

    FavoredAlpenhorn avatar
    FavoredAlpenhorn
    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser