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Questions and Answers
What is a critical duty of care for personnel responsible for operating the product?
What is a critical duty of care for personnel responsible for operating the product?
Which personnel qualification is necessary for operating the product effectively?
Which personnel qualification is necessary for operating the product effectively?
What can unauthorized modifications to the product lead to?
What can unauthorized modifications to the product lead to?
When should personnel be instructed about operational safety and hazard communication?
When should personnel be instructed about operational safety and hazard communication?
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What type of environments should the product be operated in?
What type of environments should the product be operated in?
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What consequence might untrained personnel experience while operating the product?
What consequence might untrained personnel experience while operating the product?
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What is a significant risk associated with operating in areas prone to hazardous materials?
What is a significant risk associated with operating in areas prone to hazardous materials?
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What is the primary focus of the operator's duty of care?
What is the primary focus of the operator's duty of care?
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What is the primary reason for using trained and appointed persons for selecting sling gear?
What is the primary reason for using trained and appointed persons for selecting sling gear?
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What should be avoided to prevent possible damage during transportation of goods?
What should be avoided to prevent possible damage during transportation of goods?
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What load capacity should lifting gear and transport means have to ensure safety during operations?
What load capacity should lifting gear and transport means have to ensure safety during operations?
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Which of the following is NOT a precautionary measure when handling shipments?
Which of the following is NOT a precautionary measure when handling shipments?
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What type of stress should be expected in addition to oscillation and shock stress during transport?
What type of stress should be expected in addition to oscillation and shock stress during transport?
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In the event of a crate tipping over, which outcome can be expected regardless of the crate's weight?
In the event of a crate tipping over, which outcome can be expected regardless of the crate's weight?
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What is a critical consideration before accepting a shipment?
What is a critical consideration before accepting a shipment?
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Which factor is NOT related to preventing damage during product transport?
Which factor is NOT related to preventing damage during product transport?
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Which pictogram indicates a warning of danger due to combustible substances?
Which pictogram indicates a warning of danger due to combustible substances?
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What is the primary purpose of signal words in warning notices?
What is the primary purpose of signal words in warning notices?
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Which of the following statements accurately reflects general safety information?
Which of the following statements accurately reflects general safety information?
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What is the function of the pictograms found in warning notices?
What is the function of the pictograms found in warning notices?
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Which action is recommended for users to ensure safety when working with the product?
Which action is recommended for users to ensure safety when working with the product?
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What does the word 'warning' signify in the context of warning notices?
What does the word 'warning' signify in the context of warning notices?
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Which of the following is NOT a type of warning pictogram mentioned?
Which of the following is NOT a type of warning pictogram mentioned?
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Why is it important to pay particular attention to the safety information section in the technical file?
Why is it important to pay particular attention to the safety information section in the technical file?
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What is the first step to verify that the oil filter unit is functioning correctly after installing the filter cartridge?
What is the first step to verify that the oil filter unit is functioning correctly after installing the filter cartridge?
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Which pressure reading indicates that a filter change is required in the oil filter unit?
Which pressure reading indicates that a filter change is required in the oil filter unit?
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How long should the oil filter unit be left running after switching the on-load tap-changer?
How long should the oil filter unit be left running after switching the on-load tap-changer?
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What action should be taken if the pressure in the oil filter unit does not increase?
What action should be taken if the pressure in the oil filter unit does not increase?
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What does setting rotary switch S30 to OFF accomplish in the operation of the oil filter unit?
What does setting rotary switch S30 to OFF accomplish in the operation of the oil filter unit?
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What is the purpose of the stop-cock located on the return flange during oil filter unit operation?
What is the purpose of the stop-cock located on the return flange during oil filter unit operation?
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What should be checked regarding the motor voltage if the oil filter unit fails to start?
What should be checked regarding the motor voltage if the oil filter unit fails to start?
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After completing the commissioning process, what is the final action required regarding the power supply?
After completing the commissioning process, what is the final action required regarding the power supply?
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What is the purpose of venting the on-load tap-changer head via the air-vent valve E1?
What is the purpose of venting the on-load tap-changer head via the air-vent valve E1?
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When inspecting and changing the filter cartridge, which step is crucial to avoid danger of explosion?
When inspecting and changing the filter cartridge, which step is crucial to avoid danger of explosion?
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Which action should be taken immediately after filling the oil filter unit with insulating fluid?
Which action should be taken immediately after filling the oil filter unit with insulating fluid?
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What is the required tightening torque for the bolts when attaching the cover of the oil filter unit?
What is the required tightening torque for the bolts when attaching the cover of the oil filter unit?
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What is the primary function of the vent screw located on the return flange?
What is the primary function of the vent screw located on the return flange?
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Which component must be affixed to the stop-cock for proper function after the filter cartridge has been replaced?
Which component must be affixed to the stop-cock for proper function after the filter cartridge has been replaced?
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What potential issue should be watched for when managing insulating fluid in the oil conservator?
What potential issue should be watched for when managing insulating fluid in the oil conservator?
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Which of the following steps must be performed last during the oil filter unit maintenance?
Which of the following steps must be performed last during the oil filter unit maintenance?
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What is the first step in the operation of the on-load tap-changer maintenance procedure?
What is the first step in the operation of the on-load tap-changer maintenance procedure?
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How long should the oil filter unit be allowed to run after startup?
How long should the oil filter unit be allowed to run after startup?
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What should be done 30 minutes after switching off the oil filter unit?
What should be done 30 minutes after switching off the oil filter unit?
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What is a crucial warning to be mindful of when handling the insulating fluid in the oil compartment?
What is a crucial warning to be mindful of when handling the insulating fluid in the oil compartment?
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What check should be performed after draining the insulating fluid?
What check should be performed after draining the insulating fluid?
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What must be done after opening the drain valve to prevent damage?
What must be done after opening the drain valve to prevent damage?
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Which aspect is monitored during the inspection of the oil filter unit?
Which aspect is monitored during the inspection of the oil filter unit?
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What is the purpose of commissioning the transformer as outlined in the maintenance process?
What is the purpose of commissioning the transformer as outlined in the maintenance process?
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Study Notes
Shipping and Handling Precautions
- Protect against moisture during transport to prevent damage.
- Attach lifting gear securely at the designated center of mass for safe handling.
Transportation Safeguards
- Risk of severe injury or death from improper handling and tipping loads.
- Only trained personnel should select sling gear and secure loads.
- Means of transport should have a carrying capacity greater than 500 kg to ensure safety.
Damage Prevention During Transport
- Expect oscillation, shock stress, and jolts that can lead to damage.
- Avoid dropping, tipping, or colliding with products during transit.
- Check all shipments for completeness and external damage before acceptance.
Warning Signals and Pictograms
- Various pictograms indicate dangers associated with the equipment, such as tipping hazards and electrical voltage risks.
Safety Guidelines
- Detailed instructions for safe installation, connection, commissioning, and monitoring are provided in the technical file.
- Specific focus required on explosive risks; do not use in potentially explosive atmospheres.
- Unauthorized modifications to the product can result in personal injury and equipment failure.
Personnel Qualifications
- Intended for use by qualified personnel familiar with electrical energy systems.
- Personnel must be adequately trained in installation, assembly, commissioning, and operation of the product.
Operator Responsibilities
- Ensure compliance with all safety and hazard warnings.
- Regularly instruct personnel on operational safety and safety instructions to prevent accidents and environmental harm.
Commissioning of the Oil Filter Unit
- Ensure voltage supply to the motor-drive unit and control cabinet before starting.
- Use miniature circuit breakers and the motor protective switch to activate the system.
- Set rotary switch S30 to ON to initiate the oil filter unit startup.
- Close the stop-cock on the return flange to build pressure, which should rise.
- Verify motor phase sequence (U-V-W, clockwise) for proper startup; a deviation will prevent motor activation.
- A pressure reading of 3.6 bar/0.36 MPa signals a filter change; close rotary switch S30 once maximum pressure of 4.2 bar/0.42 MPa is reached.
- Open the stop-cock at the return flange and switch the on-load tap-changer via the motor-drive unit.
- Run the oil filter unit for a 10-minute interval.
- Disconnect power supply before maintenance procedures.
Filter Cartridge Installation
- Securely attach a new filter cartridge with a new O-ring into the oil filter unit.
- Automatically center the filter cartridge when closing the cover.
- Fill the oil filter unit with insulating fluid.
- Fasten the cover with new O-ring using 6 M10 bolts (30 Nm torque) and 2 lifting eye bolts (30 Nm torque).
- Connect the return flange to the stop-cock and open stop-cocks on both feed and return flanges.
Inspection and Maintenance Procedures
- Vent the oil filter unit using the vent screw on the return flange.
- Release air from the on-load tap-changer head via air-vent valve E1.
- Vent the feed pipe connection on the on-load tap-changer head.
- Function test is essential post-maintenance to ensure proper operation.
- Maintain insulating fluid levels within the "Minimum" and "Maximum" marks to prevent explosion hazards.
- Commission the transformer and switch the on-load tap-changer through the motor-drive unit.
- Operate the oil filter unit for a minimum of 30 or 60 minutes, depending on pump settings.
- After 30 minutes of shutdown, drain insulating fluid by carefully opening the drain valve.
- Close the drain valve after fluid removal, securing it with appropriate warnings.
- Regularly check dielectric strength and water content of the insulating fluid to ensure safe operations.
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Description
This quiz focuses on the critical safety protocols for operating products that may pose a risk of explosion or fire due to flammable substances. It emphasizes the importance of adhering strictly to manufacturer guidelines and avoiding unauthorized modifications to ensure personal and material safety.