Podcast
Questions and Answers
What is the primary function of the motor-drive unit in the on-load tap-changer system?
What is the primary function of the motor-drive unit in the on-load tap-changer system?
Which component directly supports the on-load tap-changer on the transformer?
Which component directly supports the on-load tap-changer on the transformer?
In the context of the described system, what is the role of the insulating fluid?
In the context of the described system, what is the role of the insulating fluid?
What mechanism is utilized by the on-load tap-changer to change the transmission ratio?
What mechanism is utilized by the on-load tap-changer to change the transmission ratio?
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Which part is responsible for transmitting control impulses to the motor-drive unit?
Which part is responsible for transmitting control impulses to the motor-drive unit?
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What is the primary function of the DW 2000 pressure monitoring device?
What is the primary function of the DW 2000 pressure monitoring device?
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What combination does the on-load tap-changer uniquely provide?
What combination does the on-load tap-changer uniquely provide?
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How does the pressure monitoring device detect a pressure increase?
How does the pressure monitoring device detect a pressure increase?
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What occurs when the pressure monitoring device is tripped?
What occurs when the pressure monitoring device is tripped?
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How is the on-load tap-changer and motor-drive unit shipped?
How is the on-load tap-changer and motor-drive unit shipped?
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What does the cylindrical pressure-proof oil compartment do in the system?
What does the cylindrical pressure-proof oil compartment do in the system?
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How is the tripping pressure of the pressure monitoring device established?
How is the tripping pressure of the pressure monitoring device established?
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What is needed to reset the pressure monitoring device after it has tripped?
What is needed to reset the pressure monitoring device after it has tripped?
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In what way does the pressure monitoring device respond to pressure changes compared to the protective relay?
In what way does the pressure monitoring device respond to pressure changes compared to the protective relay?
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What kind of pressures does the DW 2000 monitor?
What kind of pressures does the DW 2000 monitor?
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Where is the pressure monitoring device installed in relation to the on-load tap-changer?
Where is the pressure monitoring device installed in relation to the on-load tap-changer?
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What is the maximum temperature allowed during the vacuum-drying process of the on-load tap-changer?
What is the maximum temperature allowed during the vacuum-drying process of the on-load tap-changer?
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What is the required duration for pre-drying the on-load tap-changer in circulating air?
What is the required duration for pre-drying the on-load tap-changer in circulating air?
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What should be the residual pressure of the on-load tap-changer after the drying process?
What should be the residual pressure of the on-load tap-changer after the drying process?
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Which step must be performed to avoid damage when securing the on-load tap-changer head cover?
Which step must be performed to avoid damage when securing the on-load tap-changer head cover?
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What temperature increase rate is recommended when heating up the on-load tap-changer?
What temperature increase rate is recommended when heating up the on-load tap-changer?
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What must be ensured regarding the o-ring during the mounting of the head cover?
What must be ensured regarding the o-ring during the mounting of the head cover?
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How should the on-load tap-changer head cover be aligned before securing it?
How should the on-load tap-changer head cover be aligned before securing it?
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What is the implication of having a missing or damaged o-ring?
What is the implication of having a missing or damaged o-ring?
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What is the primary function of the rupture disk mentioned in the content?
What is the primary function of the rupture disk mentioned in the content?
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Which standard does the rupture disk comply with?
Which standard does the rupture disk comply with?
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What is the response mechanism of the MPreC® pressure relief device?
What is the response mechanism of the MPreC® pressure relief device?
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What does the temperature monitoring system track?
What does the temperature monitoring system track?
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In what locations are the pressure relief devices located?
In what locations are the pressure relief devices located?
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How does the MPreC® pressure relief device differ from the rupture disk?
How does the MPreC® pressure relief device differ from the rupture disk?
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Which component does NOT provide a signaling function?
Which component does NOT provide a signaling function?
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Which component is responsible for monitoring the pressure in the system?
Which component is responsible for monitoring the pressure in the system?
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What is the maximum allowable speed for drilling when working with the on-load tap-changer?
What is the maximum allowable speed for drilling when working with the on-load tap-changer?
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What action should be taken if an incomplete tap-change operation occurs?
What action should be taken if an incomplete tap-change operation occurs?
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In a multiple-column application, what is required for connecting on-load tap-changer heads?
In a multiple-column application, what is required for connecting on-load tap-changer heads?
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How many revolutions should be cranked after operating the diverter switch to complete the tap-change operation?
How many revolutions should be cranked after operating the diverter switch to complete the tap-change operation?
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What should be done after completing the transformer ratio test?
What should be done after completing the transformer ratio test?
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What tool can be used for actuating the change-over selector if higher torque is required?
What tool can be used for actuating the change-over selector if higher torque is required?
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What should not be exceeded when reaching the end positions while operating the on-load tap-changer?
What should not be exceeded when reaching the end positions while operating the on-load tap-changer?
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What is the purpose of opening the kerosene drain plug in the oil compartment?
What is the purpose of opening the kerosene drain plug in the oil compartment?
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The on-load tap-changer head features 6 pipe connections.
The on-load tap-changer head features 6 pipe connections.
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Pipe connection Q is intended for connecting the oil filter unit.
Pipe connection Q is intended for connecting the oil filter unit.
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The functions of the R and Q pipe connections can be interchanged.
The functions of the R and Q pipe connections can be interchanged.
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All pipe bends can be swiveled without loosening the pressure ring.
All pipe bends can be swiveled without loosening the pressure ring.
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A rupture disk is located outside of the oil compartment.
A rupture disk is located outside of the oil compartment.
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The OILTAP® V on-load tap-changer is designed for a limited number of maximum operating positions.
The OILTAP® V on-load tap-changer is designed for a limited number of maximum operating positions.
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Pipe connection Q has an open connection for the oil filter unit.
Pipe connection Q has an open connection for the oil filter unit.
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The upper gear unit is a part of the on-load tap-changer assembly.
The upper gear unit is a part of the on-load tap-changer assembly.
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The on-load tap-changer can switch 3 times the rated through-current $I_r$ at its rated step voltage $U_{ir}$.
The on-load tap-changer can switch 3 times the rated through-current $I_r$ at its rated step voltage $U_{ir}$.
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Only qualified personnel should perform necessary work on the product.
Only qualified personnel should perform necessary work on the product.
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The product is designed to operate under direct current conditions with a frequency of 50/60 Hz.
The product is designed to operate under direct current conditions with a frequency of 50/60 Hz.
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The serial numbers of on-load tap-changer accessories must match if supplied as a set in one order.
The serial numbers of on-load tap-changer accessories must match if supplied as a set in one order.
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Operating the product contrary to the provided technical file is permissible if conditions allow.
Operating the product contrary to the provided technical file is permissible if conditions allow.
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The nameplate of the product includes the standard valid for the product and the year of issue.
The nameplate of the product includes the standard valid for the product and the year of issue.
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Special tools not included in the scope of delivery may be used for the intended purpose of the equipment.
Special tools not included in the scope of delivery may be used for the intended purpose of the equipment.
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An on-load tap-changer must be operated in accordance with the specified delivery conditions and technical data.
An on-load tap-changer must be operated in accordance with the specified delivery conditions and technical data.
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The DW 2000 pressure monitoring device operates without any mechanical components.
The DW 2000 pressure monitoring device operates without any mechanical components.
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The pressure monitoring device is designed to trip under conditions of low-energy interference.
The pressure monitoring device is designed to trip under conditions of low-energy interference.
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After triggering, the sensor on the snap-action switch must be reset manually to its initial position.
After triggering, the sensor on the snap-action switch must be reset manually to its initial position.
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The tripping pressure of the pressure monitoring device can be adjusted after installation.
The tripping pressure of the pressure monitoring device can be adjusted after installation.
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The pressure monitoring device is installed inside the oil compartment of the on-load tap-changer.
The pressure monitoring device is installed inside the oil compartment of the on-load tap-changer.
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The pressure monitoring device reacts more slowly to pressure increases than the protective relay.
The pressure monitoring device reacts more slowly to pressure increases than the protective relay.
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A corrugated tube in the pressure monitoring device functions similarly to a barometer.
A corrugated tube in the pressure monitoring device functions similarly to a barometer.
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Once tripped, the transformer is immediately re-energized without any manual intervention.
Once tripped, the transformer is immediately re-energized without any manual intervention.
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The maximum permissible axial offset for the drive shaft is 4°.
The maximum permissible axial offset for the drive shaft is 4°.
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An intermediate bearing is required when the maximum value of 2472 mm is exceeded.
An intermediate bearing is required when the maximum value of 2472 mm is exceeded.
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The standard version of the drive shaft includes a cardan joint and an insulator.
The standard version of the drive shaft includes a cardan joint and an insulator.
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The middle of the hand crank and the middle of the bevel gear measures 536 mm.
The middle of the hand crank and the middle of the bevel gear measures 536 mm.
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The protective cover is a critical component of the drive shaft assembly.
The protective cover is a critical component of the drive shaft assembly.
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A hose clip is used to secure the coupling bracket in the drive shaft system.
A hose clip is used to secure the coupling bracket in the drive shaft system.
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Crates should be stacked above a height of 1.5 m to ensure stability during transport.
Crates should be stacked above a height of 1.5 m to ensure stability during transport.
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The outer marking on the packaging indicates if the on-load tap-changer has been packed upright.
The outer marking on the packaging indicates if the on-load tap-changer has been packed upright.
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Desiccant is added after the plastic foil is bonded around the packaged goods.
Desiccant is added after the plastic foil is bonded around the packaged goods.
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Sealed packaging surrounds the packaged goods with plastic foil on all sides to enhance protection.
Sealed packaging surrounds the packaged goods with plastic foil on all sides to enhance protection.
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It is permissible to stack up to three equally sized crates on top of each other.
It is permissible to stack up to three equally sized crates on top of each other.
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Adherence to packaging markings is optional for the shipment of non-hazardous goods.
Adherence to packaging markings is optional for the shipment of non-hazardous goods.
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The packaging is designed to prevent the parts from touching the loading surface during transportation.
The packaging is designed to prevent the parts from touching the loading surface during transportation.
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Incorrectly stacked crates can lead to damage to the packaged goods during transportation.
Incorrectly stacked crates can lead to damage to the packaged goods during transportation.
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What is the first step in checking the protective relay before commissioning the transformer?
What is the first step in checking the protective relay before commissioning the transformer?
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During the testing of the pressure monitoring device, why is it important to ground the transformer on both the high-voltage and low-voltage sides?
During the testing of the pressure monitoring device, why is it important to ground the transformer on both the high-voltage and low-voltage sides?
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Which condition must be satisfied during the pressure monitoring device test to ensure safety?
Which condition must be satisfied during the pressure monitoring device test to ensure safety?
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What action should be taken after activating the sensor on the snap-action switch during the passive protection test?
What action should be taken after activating the sensor on the snap-action switch during the passive protection test?
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What is the primary purpose of pressing the OFF test button during the protective relay check?
What is the primary purpose of pressing the OFF test button during the protective relay check?
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Which operation must be performed to ensure the circuit breaker cannot be closed during the pressure monitoring device check?
Which operation must be performed to ensure the circuit breaker cannot be closed during the pressure monitoring device check?
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What indicates that the sensor on the snap-action switch is in the OFF position?
What indicates that the sensor on the snap-action switch is in the OFF position?
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When testing the transformer, how should the circuit breaker be handled after deactivating the fire extinguishing device?
When testing the transformer, how should the circuit breaker be handled after deactivating the fire extinguishing device?
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What is the consequence of activating the tap-change supervisory device?
What is the consequence of activating the tap-change supervisory device?
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What should be checked if the fill level of the insulating fluid has fallen below the minimum?
What should be checked if the fill level of the insulating fluid has fallen below the minimum?
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Which action should be taken after the tripping of the motor protective switch in the motor-drive unit?
Which action should be taken after the tripping of the motor protective switch in the motor-drive unit?
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What is strictly prohibited when the transformer is switched on?
What is strictly prohibited when the transformer is switched on?
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Under what condition must the on-load tap-changer and transformer be checked?
Under what condition must the on-load tap-changer and transformer be checked?
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What could activation of a rupture disk in the on-load tap-changer head indicate?
What could activation of a rupture disk in the on-load tap-changer head indicate?
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When addressing a signaling contact that indicates insufficient insulating fluid, what must be prioritized?
When addressing a signaling contact that indicates insufficient insulating fluid, what must be prioritized?
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What is the initial action to be taken when motor-drive unit tripping occurs?
What is the initial action to be taken when motor-drive unit tripping occurs?
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What can result from improper use of insulating fluids in the on-load tap-changer?
What can result from improper use of insulating fluids in the on-load tap-changer?
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What is a crucial safety measure when operating the on-load tap-changer?
What is a crucial safety measure when operating the on-load tap-changer?
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Which of the following actions is essential to avoid an explosion when using the on-load tap-changer?
Which of the following actions is essential to avoid an explosion when using the on-load tap-changer?
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What should be checked before operating the on-load tap-changer?
What should be checked before operating the on-load tap-changer?
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What is a significant risk when the on-load tap-changer is overloaded?
What is a significant risk when the on-load tap-changer is overloaded?
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Which measure can be taken to mitigate the risk of static charge during commissioning?
Which measure can be taken to mitigate the risk of static charge during commissioning?
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What must be ensured regarding the on-load tap-changer's operational conditions?
What must be ensured regarding the on-load tap-changer's operational conditions?
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What could potentially happen if the on-load tap-changer head cover lacks a pressure relief device?
What could potentially happen if the on-load tap-changer head cover lacks a pressure relief device?
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Which information is NOT required to be reported to Maschinenfabrik Reinhausen after a protective relay trip?
Which information is NOT required to be reported to Maschinenfabrik Reinhausen after a protective relay trip?
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What action should be taken if the pressure monitoring device has been tripped?
What action should be taken if the pressure monitoring device has been tripped?
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What should be verified before recommissioning a transformer after an incident?
What should be verified before recommissioning a transformer after an incident?
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Why is it important to ensure the on-load tap-changer and transformer are sufficiently tested?
Why is it important to ensure the on-load tap-changer and transformer are sufficiently tested?
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When referencing the tripping of protective relay, which of the following is NOT a question to ask?
When referencing the tripping of protective relay, which of the following is NOT a question to ask?
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What potential consequence is indicated for insufficient testing of on-load tap-changer and transformer?
What potential consequence is indicated for insufficient testing of on-load tap-changer and transformer?
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After identifying and fixing the cause of a protective relay trip, what is the first step in re-commissioning the transformer?
After identifying and fixing the cause of a protective relay trip, what is the first step in re-commissioning the transformer?
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What factor should NOT be ignored when performing the steps after a pressure monitoring device trip?
What factor should NOT be ignored when performing the steps after a pressure monitoring device trip?
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What potential consequence can result from using spare parts that are not approved by Maschinenfabrik Reinhausen GmbH?
What potential consequence can result from using spare parts that are not approved by Maschinenfabrik Reinhausen GmbH?
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Which characteristic defines an electrically skilled person in relation to safety and operational standards?
Which characteristic defines an electrically skilled person in relation to safety and operational standards?
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How should an electrically trained person approach their assigned tasks according to the qualifications expected?
How should an electrically trained person approach their assigned tasks according to the qualifications expected?
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What is an essential requirement for the personnel responsible for assembly, commissioning, and maintenance of the system?
What is an essential requirement for the personnel responsible for assembly, commissioning, and maintenance of the system?
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What role does the electrically skilled person fulfill in terms of compliance with laws and regulations?
What role does the electrically skilled person fulfill in terms of compliance with laws and regulations?
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What must be confirmed about the electrically skilled person's qualifications when performing electrical work?
What must be confirmed about the electrically skilled person's qualifications when performing electrical work?
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Which scenario correctly depicts the guidelines for using spare parts as established by Maschinenfabrik Reinhausen GmbH?
Which scenario correctly depicts the guidelines for using spare parts as established by Maschinenfabrik Reinhausen GmbH?
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What indicates an electrically skilled person's ability to perform tasks related to electrical systems?
What indicates an electrically skilled person's ability to perform tasks related to electrical systems?
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Pictograms provide a warning of dangerous electrical voltage.
Pictograms provide a warning of dangerous electrical voltage.
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Multi-step instructions consist of only a single process step.
Multi-step instructions consist of only a single process step.
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Important information is presented to complicate understanding of procedures.
Important information is presented to complicate understanding of procedures.
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The aim of action is a common component in both single-step and multi-step instructions.
The aim of action is a common component in both single-step and multi-step instructions.
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A pictogram warning of a danger of crushing is unnecessary in safety instructions.
A pictogram warning of a danger of crushing is unnecessary in safety instructions.
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Tables are used to organize information regarding pictograms and instructions.
Tables are used to organize information regarding pictograms and instructions.
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The result of action is only optional in multi-step instructions.
The result of action is only optional in multi-step instructions.
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Only single-step instructions can include requirements related to the task.
Only single-step instructions can include requirements related to the task.
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The maximum axial offset permissible for the drive shaft without a cardan joint is 3°.
The maximum axial offset permissible for the drive shaft without a cardan joint is 3°.
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An intermediate bearing is required when the length exceeds 2472 mm.
An intermediate bearing is required when the length exceeds 2472 mm.
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The standard version of the drive shaft includes a cardan joint.
The standard version of the drive shaft includes a cardan joint.
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The middle of the hand crank is located 536 mm from the middle of the bevel gear in the drive shaft configuration.
The middle of the hand crank is located 536 mm from the middle of the bevel gear in the drive shaft configuration.
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The coupling bracket is one of the components of the drive shaft.
The coupling bracket is one of the components of the drive shaft.
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The square tube is not a part of the drive shaft assembly.
The square tube is not a part of the drive shaft assembly.
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An incompletely bled suction pipe does not affect the insulation capability of the on-load tap changer to ground.
An incompletely bled suction pipe does not affect the insulation capability of the on-load tap changer to ground.
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The motor-drive unit can operate without the insulating fluid in the oil compartment.
The motor-drive unit can operate without the insulating fluid in the oil compartment.
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Only circuits not stated in the technical data for position transmitter equipment may be connected to the position transmitter module.
Only circuits not stated in the technical data for position transmitter equipment may be connected to the position transmitter module.
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The vent screw must be opened and closed without bleeding the suction pipe.
The vent screw must be opened and closed without bleeding the suction pipe.
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The selector/de-energized tap changer can operate when it's only partially filled with insulating fluid.
The selector/de-energized tap changer can operate when it's only partially filled with insulating fluid.
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Damage can occur to the on-load tap-changer if incorrect circuits are used for the position transmitter.
Damage can occur to the on-load tap-changer if incorrect circuits are used for the position transmitter.
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Sealing the vent screw with the screw cap is a final step after ensuring the suction pipe is bled.
Sealing the vent screw with the screw cap is a final step after ensuring the suction pipe is bled.
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The on-load tap-changer is designed for infinite maximum operating positions.
The on-load tap-changer is designed for infinite maximum operating positions.
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It is safe to re-commission the transformer without contacting Maschinenfabrik Reinhausen after a protective relay has tripped.
It is safe to re-commission the transformer without contacting Maschinenfabrik Reinhausen after a protective relay has tripped.
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The pressure monitoring device can be tripped without any risk of injury if proper testing is not conducted.
The pressure monitoring device can be tripped without any risk of injury if proper testing is not conducted.
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The transformer can be put back into operation immediately if the reason for the protective relay tripping is unknown.
The transformer can be put back into operation immediately if the reason for the protective relay tripping is unknown.
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Overvoltages may be registered at the instant of tripping the transformer.
Overvoltages may be registered at the instant of tripping the transformer.
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The load of the transformer does not need to be reported to Maschinenfabrik Reinhausen when tripping occurs.
The load of the transformer does not need to be reported to Maschinenfabrik Reinhausen when tripping occurs.
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It is recommended to check the protective relay before commissioning the transformer post-trip.
It is recommended to check the protective relay before commissioning the transformer post-trip.
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Switching operations in the network can affect the operation of the transformer and should be reported at the time of tripping.
Switching operations in the network can affect the operation of the transformer and should be reported at the time of tripping.
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Only the protective relay is responsible for the trip condition; no other devices need to be checked.
Only the protective relay is responsible for the trip condition; no other devices need to be checked.
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An OF 100 oil filter unit with paper filter insert is recommended for on-load tap-changers that operate less than 15,000 tap-change operations per year.
An OF 100 oil filter unit with paper filter insert is recommended for on-load tap-changers that operate less than 15,000 tap-change operations per year.
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In tropical climates, the OF 100 oil filter unit must be used with a combined filter insert if the highest operating voltage is above 55 kV.
In tropical climates, the OF 100 oil filter unit must be used with a combined filter insert if the highest operating voltage is above 55 kV.
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The oil compartment of the on-load tap-changer poses no risk of explosion if handled correctly.
The oil compartment of the on-load tap-changer poses no risk of explosion if handled correctly.
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When designing on-load tap-changers, ensuring the inclusion of an OF 100 oil filter unit is optional regardless of the climate conditions.
When designing on-load tap-changers, ensuring the inclusion of an OF 100 oil filter unit is optional regardless of the climate conditions.
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The recommendation for an OF 100 oil filter unit extends the maintenance intervals for on-load tap-changers.
The recommendation for an OF 100 oil filter unit extends the maintenance intervals for on-load tap-changers.
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Explosive gases in oil conservators can only develop during the operation of the on-load tap-changer.
Explosive gases in oil conservators can only develop during the operation of the on-load tap-changer.
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The use of the OF 100 oil filter unit is not recommended for on-load tap-changers operating in dry climates.
The use of the OF 100 oil filter unit is not recommended for on-load tap-changers operating in dry climates.
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In operations above the dew point, dielectric properties of insulating fluid in on-load tap-changers are not affected.
In operations above the dew point, dielectric properties of insulating fluid in on-load tap-changers are not affected.
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Study Notes
Product Description
- Motor-drive unit alters the on-load tap-changer's position based on control impulses, optimizing the transformer’s transmission ratio.
- On-load tap-changer combines diverter switch and tap selector functions within a tubular design.
- Insulating fluid is separated from transformer oil via a cylindrical pressure-proof compartment.
- Unit comes shipped in an adjustment position, secure to the transformer via a dedicated head.
Pressure Monitoring Device
- DW 2000 device protects against excessive pressure, enhancing transformer safety.
- Installed externally, it reacts to static and dynamic pressures in the oil compartment.
- Utilizes a corrugated tube with a spring for sensing, linking to a snap-action switch that triggers the circuit breaker if pressure exceeds set levels.
- Requires manual reset post-tripping; low-energy interference does not cause false tripping.
Safety Devices
- Rupture disk acts as a pressure relief mechanism adhering to IEC 60214-1, positioned on the tap-changer head cover.
- Option for MPreC® pressure relief device that also meets IEC standards, available upon request.
Temperature Monitoring
- System monitors insulating fluid temperature in the oil compartment, allowing temperature checks via a compatible tool.
- Inspection window assists in verifying operating position—excessive overshooting is to be avoided.
Maintenance and Operation
- For multiple-column setups, horizontal drive shafts must connect the on-load tap-changer heads.
- Specific procedures for movement include cranking the drive shaft post-operation for complete tap-change.
- Transformer ratio tests must be conducted in all positions, followed by necessary drying and sealing processes.
Mounting Procedure
- Heating protocol includes gradual temperature increase to maximum 110 °C.
- Pre-drying should occur at upward of 110 °C for 20 hours, followed by vacuum drying at 105-125 °C for at least 50 hours.
- Securing head cover requires careful handling of o-ring and sealing surfaces to prevent insulating fluid leakage.
- Proper alignment of markings on head and cover is essential during installation.
Intended Use
- Products must be used only with the specified transformer or motor-drive unit listed in the order.
- Serial numbers of on-load tap-changer and associated accessories must match when supplied as a set.
- Valid standards and issue year can be found on the product's nameplate.
- Products should be operated according to the technical file, agreed delivery conditions, and technical data.
- Only qualified personnel should perform necessary work on the equipment.
- Utilize only equipment and special tools included in the delivery and as specified in technical documents.
Operating Conditions
- The on-load tap-changer is designed for sinusoidal 50/60 Hz alternating current.
- It can switch 2 times the rated through-current (Ir) at the rated step voltage (Uir).
- Key components of the on-load tap-changer are detailed in installation drawings included in the appendix.
Product Description
- Reference maximum operating positions for the on-load tap-changer in technical data.
- The on-load tap-changer head contains 4 pipe connections for various functions, some fitted with pipe bends at the factory.
Pipe Connections
- Pipe connection Q is designated for connecting the oil filter unit, closed with a blank cover.
- Functions of pipe connections R and Q can be interchanged.
Pressure Monitoring Device
- The DW 2000 device protects the on-load tap-changer from excessive pressure.
- It is triggered by static and dynamic pressures in the oil compartment.
- Utilizes a corrugated tube and spring mechanism to activate a sensor that de-energizes the transformer when pressure increases.
- The device requires manual reset post-tripping and is unaffected by low-energy interference.
Drive Shaft Configuration
- Drive shaft without cardan joint or insulator has specific configuration details, including allowable axial offsets.
- An intermediate bearing is necessary when shaft lengths exceed specified limits.
Packaging, Transport, and Storage
- Incorrect stacking of crates can damage contents, emphasizing the need for following outer packaging instructions.
- Crates should not be stacked above 1.5 m; up to 2 equally sized crates can be stacked.
- Packaging is designed to comply with transportation laws and includes sturdy crates with protective features against humidity.
- Markings provide instructions for safe transport and proper storage adherence.
Spare Parts and Modifications
- Consult Maschinenfabrik Reinhausen GmbH before modifying any product.
- Non-approved spare parts may cause physical injury, product damage, and malfunctions.
- Always use officially approved spare parts for safety and reliability.
Personnel Qualifications
- Personnel responsible for assembly, commissioning, operation, maintenance, and inspection must be adequately qualified.
- An electrically skilled person possesses technical qualifications, knowledge of standards, and the ability to identify and avoid potential hazards.
- Electrically trained persons require guidance from an electrically skilled person regarding their tasks and hazards.
Safety Measures and Procedures
- Prevent static charge build-up near transformers during commissioning to mitigate explosion risks.
- Use conductive and grounded equipment approved for flammable liquids.
- Overloading the on-load tap-changer poses explosion hazards and significant risks of injury and property damage.
Commissioning the Transformer
- Only approved insulating fluids should be used in the on-load tap-changer’s oil compartment to prevent damage.
- A pressure relief device must be installed if the tap-changer head cover has a flange for it.
Protective Relay and Pressure Monitoring Device Checks
- Before commissioning, ensure the protective relay is functioning correctly.
- Perform active and passive protection tests by grounding the transformer and checking various states of the circuit breaker and sensor positions.
- For pressure monitoring, verify that the transformer is de-energized, and ensure all connections remain intact during testing.
Fault Response and Re-Commissioning
- Upon tripping of the pressure monitoring device, immediate consultation with Maschinenfabrik Reinhausen is required to assess potential damages.
- Detailed records must be kept regarding the tripping circumstances and any related protective device responses.
- Re-commissioning can occur only after verifying the protective relay's functionality and addressing the causes of the trip.
General Warnings
- Inadequately tested equipment poses extreme risks of severe injury or death.
- Always confirm the integrity of the on-load tap-changer and transformer before resuming operations.
Warning Notices and Pictograms
- Pictograms indicate specific dangers: danger points, dangerous electrical voltage, combustible substances, risk of tipping, and crushing hazards.
- Information systems in technical files aim to simplify understanding of procedures.
Instruction Systems
- Single-step instructions outline aim, optional requirements, one step, and optional results.
- Multi-step instructions structure includes aim, optional requirements, sequential steps, and optional results for each step.
Drive Shaft Specifications
- Standard version of drive shaft lacks cardan joint and insulator.
- Key component dimensions include: middle of hand crank to middle of bevel gear at 536 mm.
- Maximum axial offset is 2°; an intermediate bearing is required if exceeded.
Oil Filter Unit Recommendations
- For on-load tap-changers with >15,000 operations/year, use OF 100 oil filter unit to extend maintenance intervals.
- In humid tropical/subtropical climates, a combined filter insert is needed to maintain dielectric properties under high humidity and low temperatures.
Commissioning Precautions
- Danger of explosion is noted related to explosive gases in oil compartments; all ignition sources must be eliminated.
- Incomplete bleeding of suction pipes impairs insulation capability; bleeding is essential to ensure operational integrity.
Maintenance and Operational Notices
- Ensure on-load tap-changer is fully immersed in insulating fluid to avoid damage; complete filling is critical.
- Incorrect connections of position transmitter equipment can damage both the tap-changer and motor-drive unit; use specified circuits only.
Re-commissioning Process
- After resolving issues with the protective relay, conduct checks and ensure the transformer can be safely commissioned again.
Fault Elimination Safety Warnings
- Tripping of the pressure monitoring device poses serious safety risks; always consult Maschinenfabrik Reinhausen before reusing equipment to confirm safety.
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Description
Explore the functionalities of the OILTAP® V motor-drive unit, designed to change the operating position of on-load tap-changers. This unit plays a crucial role in adapting the transformer's transmission ratio according to controlling impulses like those received from a voltage regulator. Gain insights into its engineering and operation principles.
