Questions and Answers
What is the first step in connecting the plug connector for tap-change supervisory control?
What is the purpose of the countersunk head screws in the installation of the tap position indicator disc?
Which component is used to secure leads once the plug connector is connected?
How should the tap position indicator disc be inserted during installation?
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What is required to secure the countersunk head screws during installation?
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What hardware is used to secure the panel with bracket onto the indicator drive shaft?
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Which of the following is NOT a step in installing the VACUTAP® VM® diverter switch insert?
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What is the final step in the installation process of the tap position indicator?
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What is the first step in removing the tap position indicator for the version with a multiple coarse change-over selector and a long panel?
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Which tool is suggested to lever off the cover disk in the short panel version?
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What should be done after removing the countersunk head screw in the short panel version?
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What component must be removed after pulling the tap position indicator disc out horizontally?
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In the long panel version, what is the action to take after removing both countersunk head screws?
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What is the last step mentioned for removing the tap position indicator in both versions?
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What is true about the design of the tap position indicator for the version with a short panel?
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Which of the following steps is NOT necessary when removing the tap position indicator with a long panel?
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What should be done to ensure safety when lifting the diverter switch insert?
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What is a consequence of not securing the diverter switch insert properly?
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How long can the open diverter switch oil compartment be exposed to ambient humidity without causing damage?
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What is necessary for the proper placement of the diverter switch insert after removal?
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What should be removed if the OILTAP® M was supplied before 1981?
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What is the purpose of inserting lifting gear into the diverter switch insert eyebolts?
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What can happen if the diverter switch insert remains unstable during handling?
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What key precaution should be taken to protect the diverter switch's oil compartment?
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What is the reversal value for a normal operating time of a VACUTAP® VM® diverter switch?
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What action should be taken if the protective relay has a tripping value other than 1.2 m/s?
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Which monitoring system requires changes for operation with a VACUTAP® VM® diverter switch insert?
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How many hand crank revolutions correspond to half operating time for a complete diverter switch operation?
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What is the purpose of centering the motor-drive unit?
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What should be done if the motor-drive unit's reversal value does not match the specified value?
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What type of relay should be used if the protective relay does not meet the required specifications?
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What is indicated by the operational instructions concerning TAPMOTION® TD?
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What immediate action should be taken if there is a fault detected on the on-load tap-changer?
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Which document should be consulted for additional information regarding the RS 2001 protective relay?
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What should be done if the RS 2001 protective relay or other protective devices have tripped?
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Which action is specifically advised after the tripping of a protective relay?
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In the event of tripping the pressure relief device, what should be the next step?
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Where can one find the contact information for Maschinenfabrik Reinhausen?
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What is a recommended protocol if faults on the motor-drive unit cannot be rectified on site?
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What does the presence of faults in the system indicate regarding equipment usage?
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The packaging is suitable for transportation with a stackability of 2000 kg/m2 top surface.
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The wooden crate used for packaging does not allow any parts to touch the loading surface during transport.
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Desiccant is added to the packaged goods to promote moisture retention.
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The packaging symbols include a warning to protect against moisture and indicate that the items are heavy.
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Only authorized personnel should select the sling gear and secure loads exceeding 500 kg in weight.
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The sealed packaging is bonded after the air is fully extracted and the drying agent is added.
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The packaging should allow for impermissible changes in position of the goods inside the crate.
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Walking under a suspended load is permitted only if the load is less than 500 kg.
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In the version with a multiple coarse change-over selector, long panel, both countersunk head screws are removed before pulling the tap position indicator disc out horizontally.
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The tap position indicator disc can be removed vertically from between the panel and the bracket.
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The cover disk can be levered off using a flat screwdriver in the long panel version.
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After removing both hexagon screws, no additional components need to be taken out before pulling the panel and bracket off the indicator drive shaft.
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The procedure for removing the tap position indicator involves pulling the tap position indicator disc outwards instead of horizontally.
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In the removal process of the tap position indicator, workers should use a screwdriver to remove the tap position indicator disc cover.
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Both versions of the tap position indicator require the removal of a lock tab after hexagon screws are taken out.
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The operation of the tap position indicator disc is independent of the type of panel used (long or short).
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The tap-change supervisory control must always use a plug connector in an OILTAP® M with VACUTAP® VM® diverter switch insert.
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The tap-change supervisory control terminal connection can be directly used with a VACUTAP® VM® diverter switch insert.
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It is safe to ensure that there is no supply voltage on the tap-change supervisory control while working on it without additional precautions.
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Red markings on the diverter switch insert must align with yellow markings on the on-load tap-changer head.
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The spring clip is attached to the tap position indicator disc to secure it in place.
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A protective sleeve is installed on the indicator drive shaft to enhance durability.
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It is advised to pull the panel and bracket straight down from the indicator drive shaft.
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One must always contact Maschinenfabrik Reinhausen Technical Service for any assistance with the tap-change supervisory control.
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Securing the carrier plate of the diverter switch insert is one of the initial steps in the installation process.
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Maschinenfabrik Reinhausen Technical Service should be contacted if further clarification is needed regarding the terminal connection's installation.
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The tap position indicator does not contain any spring mechanisms.
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The installation of a VACUTAP® VM® diverter switch insert involves the use of lifting gear in the lugs of the diverter switch insert carrier plate.
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The tap-change supervisory control's terminal connection can remain intact when the VACUTAP® VM® diverter switch insert is installed.
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The diverter switch insert should be pulled out horizontally during its removal process.
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Pulling the tap position indicator disc must be done carefully to avoid damaging the connecting lead.
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The installation manual specifies that the diverter switch insert can be lowered at any speed.
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The minimum permissible dielectric strength Ud during operation for the diverter switch oil is 30 kV/2.5 mm.
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When protective devices have tripped, it is safe to energize the transformer immediately.
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Using conductive and grounded hoses approved for flammable liquids is recommended during maintenance operations.
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The presence of explosive gases is a danger that can occur under the on-load tap-changer cover.
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Impact wrenches can be safely operated during maintenance of the tap-changer.
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The maximum allowable water content in the diverter switch oil is 30 ppm.
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Damage to the on-load tap-changer can occur if the protective relay has not tripped.
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De-energizing all auxiliary circuits is an essential step before removing the on-load tap-changer cover.
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Study Notes
Removing OILTAP® M Diverter Switch Insert
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The tap position indicator can be removed through different methods depending on the panel's design.
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For long panels: Remove both countersunk head screws, then pull the tap position indicator disc horizontally from the panel.
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After removing the tap position indicator disc, remove hexagon screws and lock tabs before lifting the panel and bracket off the indicator drive shaft.
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For short panels: Disconnect using a countersunk head screw, then use a flat screwdriver to lever off the cover disk, and pull the tap position indicator disc out horizontally as well.
Lifting and Handling Precautions
- Use lifting gear securely attached to the eyebolts before lifting the diverter switch insert.
- Ensure to lift the insert slowly and vertically while placing it on a level surface to prevent tipping and injuries.
- The diverter switch oil compartment should not be exposed to humidity for more than 10 hours to protect dielectric strength.
Installing VACUTAP® VM® Diverter Switch Insert
- Supervision of tap-change control involves connecting a plug connector and securing it in its bracket.
- Installation steps include placing a panel with the bracket onto the indicator drive shaft, followed by securing it with hexagon screws.
- The tap position indicator disc is inserted and secured using countersunk head screws, with a specific method to ensure they are tightened.
Reversal Values
- Different operating times are outlined for normal (33 hand crank revolutions corresponds to 1 complete diverter switch operation) and half operations (16.5 hand crank revolutions).
- Consult technical service if there’s a mismatch in motor-drive unit reversal values.
Protective Relay and Monitoring Systems
- A protective relay should be replaced if the tripping value is not 1.2 m/s, with the RS 2001 relay being the recommended replacement.
- Monitoring systems like TM100 or TAPGUARD® 260 may require modifications for compatibility with the VACUTAP® VM® diverter switch.
Fault Detection and Troubleshooting
- Precautionary checks are recommended if faults occur in the on-load tap-changer or motor-drive unit to avoid further damage.
- For tripping issues involving protective devices, follow the prescribed maintenance instructions and contact Maschinenfabrik Reinhausen GmbH for further assistance.
Contact Information
- Maschinenfabrik Reinhausen GmbH offers technical support through various channels, including email and phone, for maintenance and troubleshooting queries.
Suitability of Packaging
- Designed for all common types of transportation.
- Capable of withstanding stackability of up to 1000 kg/m² on the top surface.
- Packaged in a stable wooden crate, ensuring security during transit and preventing contact with loading surfaces or the ground post-unloading.
- Inside stabilization of goods to maintain position during movement.
- Sealed with PE foil completely enclosing the goods, bonded after the inclusion of desiccant and air removal.
Markings and Symbols
- Packaging features mandatory symbols for safe transport and storage.
- Symbols include instructions to protect against moisture and indicate fragile contents.
Safety Guidelines for Handling Shipments
- Strict warning against the risk of death or severe injury due to load tipping or falling.
- Only trained personnel may select sling gear and secure loads.
- Prohibition against walking under suspended loads.
- Use only transport equipment with a capacity exceeding 500 kg for lifting operations.
Instructions for Removing Tap Position Indicator
- Detailed steps for removing various versions of tap position indicators, involving the removal of screws and careful pulling of components.
Disconnecting Tap-Change Supervisory Control Lead
- Warnings regarding fatal risks from explosive gases; ensure no supply voltage is present before disconnecting.
- Guidelines for handling connection leads safely during maintenance procedures.
- Special instructions for transitioning connection types when installing specific components.
Installation of VACUTAP® VM® Diverter Switch Insert
- Steps for aligning and securing the diverter switch insert during installation are specified for various transformer designs.
Oil Limit Values for Diverter Switch
- Established dielectric strength values during operation: minimum of 30 kV and maximum water concentration of 30 ppm.
Troubleshooting Warnings
- Emphasis on extreme caution due to risk of explosions and the presence of flammable materials during inspections.
- Procedures to follow when protective relays indicate potential damage, including checks before re-energizing the transformer.
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Description
This quiz covers the procedures for removing and handling the OILTAP® M Diverter Switch Insert. You'll learn about the necessary steps for both long and short panels, as well as important lifting precautions to ensure safety during the process. Test your knowledge on the best practices for maintaining equipment integrity and operator safety.
