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What is the primary focus of the inspection instructions documented in Inspection Instructions No. 68/77?
What is the primary focus of the inspection instructions documented in Inspection Instructions No. 68/77?
Which component is addressed under the operational tests section?
Which component is addressed under the operational tests section?
Which of the following components is explicitly mentioned for replacement in the document?
Which of the following components is explicitly mentioned for replacement in the document?
What type of inspections are outlined in section 2.1?
What type of inspections are outlined in section 2.1?
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In the context of lubrication, what is the maximum page number on which the lubricating schedule is found?
In the context of lubrication, what is the maximum page number on which the lubricating schedule is found?
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Which inspection component is situated in section 3.3?
Which inspection component is situated in section 3.3?
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What is described in the appendix section of the inspection instructions?
What is described in the appendix section of the inspection instructions?
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Which operational test involves manual control of the motor?
Which operational test involves manual control of the motor?
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What function does the 'motor protective switch' serve in the motor drive unit MA 7?
What function does the 'motor protective switch' serve in the motor drive unit MA 7?
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Which component is responsible for providing a manual operation safety feature in the motor drive unit?
Which component is responsible for providing a manual operation safety feature in the motor drive unit?
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Which type of activation does the push-button labeled 'LOWER' provide?
Which type of activation does the push-button labeled 'LOWER' provide?
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What is the primary role of cam switches in the motor drive system?
What is the primary role of cam switches in the motor drive system?
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How long does it typically take to inspect the motor drive if no parts need replacing?
How long does it typically take to inspect the motor drive if no parts need replacing?
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What does the position transmitter do within the motor drive unit?
What does the position transmitter do within the motor drive unit?
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Which feature is associated with the braking contactor in this context?
Which feature is associated with the braking contactor in this context?
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What is the function of the limit switches in the motor drive unit?
What is the function of the limit switches in the motor drive unit?
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What is the primary function of the 'Motor contactors' in the given content?
What is the primary function of the 'Motor contactors' in the given content?
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In the context of a 'Signalling lamp', which situation would it most likely indicate?
In the context of a 'Signalling lamp', which situation would it most likely indicate?
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What type of relay is specifically mentioned for step-by-step control?
What type of relay is specifically mentioned for step-by-step control?
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Which component is likely responsible for providing heating in a space?
Which component is likely responsible for providing heating in a space?
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What is a likely function of the 'Lautlampe' mentioned in the content?
What is a likely function of the 'Lautlampe' mentioned in the content?
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Which terminal is designated for parallel control of positions?
Which terminal is designated for parallel control of positions?
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Which type of contact is involved in the passage of positions?
Which type of contact is involved in the passage of positions?
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Which lamp is associated with indicating 'change in progress'?
Which lamp is associated with indicating 'change in progress'?
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What is the diameter and length of the HEX. HEAD SCREW M5 x 50?
What is the diameter and length of the HEX. HEAD SCREW M5 x 50?
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Which of the following is not a type of screw listed?
Which of the following is not a type of screw listed?
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Which nut corresponds with the 451 250 code?
Which nut corresponds with the 451 250 code?
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Identify the code associated with the CHEESE-HEAD SCREW M 4 x 10.
Identify the code associated with the CHEESE-HEAD SCREW M 4 x 10.
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What is the common feature of the items categorized as 'LOCK WASHER' in the provided content?
What is the common feature of the items categorized as 'LOCK WASHER' in the provided content?
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Which component has a dimension of 12 mm x 28 mm x 8 mm?
Which component has a dimension of 12 mm x 28 mm x 8 mm?
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Which of the following items is likely used for securing two components together in a machine?
Which of the following items is likely used for securing two components together in a machine?
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Which is true about the CIRCLIP LOCK RING dimensions listed?
Which is true about the CIRCLIP LOCK RING dimensions listed?
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What is the purpose of the direction-dependent signal lamps?
What is the purpose of the direction-dependent signal lamps?
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What should be done if direction memory signal lamps are installed?
What should be done if direction memory signal lamps are installed?
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Which component is indicated as a fin de course switch?
Which component is indicated as a fin de course switch?
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Which component functions as a locking switch?
Which component functions as a locking switch?
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What is the role of the bouton-poussoir in the system?
What is the role of the bouton-poussoir in the system?
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What does the term 'contacts actionnis par cames' refer to?
What does the term 'contacts actionnis par cames' refer to?
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Which of the following buttons is used for operational triggering?
Which of the following buttons is used for operational triggering?
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What does 'pulsante per ct/e2sala' suggest about its function?
What does 'pulsante per ct/e2sala' suggest about its function?
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Study Notes
Inspection Instructions Overview
- Inspection Instructions No. 68/77 relates to the Motor Drive Unit MA 7.
- Document contains a detailed table of contents with sections for general inspections, operational tests, replacement of parts, lubrication schedule, and appendix.
General Inspections
- General inspections cover items such as protective housing, transmission gear, ground connections, control equipment, and connecting terminals.
- The inspection of the motor drive and tap changer should occur together.
- Estimated duration for motor drive inspection is about one hour for a trained technician.
Operational Tests
- Includes verification of step-by-step operation and functionality of cam switches.
- Safety circuit checks are crucial to ensure operational safety.
- Tests for electrical and mechanical position limitations are necessary.
- Limit switches, motor safety switch, and protective switches are part of the testing procedures.
- Functionality of heaters must also be validated.
Replacement of Parts
- Specific guidelines for replacing certain components:
- Cam switches for step-by-step control
- Limit switches
- Motor safety switch
- Driving motor
- Counters
- Motor and control contactors
Lubricating Schedule
- A lubricating schedule is provided, specifying maintenance timelines for mechanical components.
Appendix and Additional Details
- The appendix includes detailed information on component specifics including several types of screws, nuts, washers, bearings, and clips used for assembly.
- Diagrams may accompany instructions for clarity on electrical equipment and circuitry.
Key Terms and Components
- Electrical equipment includes motor protective switches, signal lamps for statuses, and auxiliary contactors for operations.
- Cam switches are critical for step-by-step control functionalities, while limit switches ensure positional accuracy.
- Safety features include trip buttons and disconnect switches for operator safety during maintenance.
Miscellaneous Information
- Regular inspections and part replacements are critical to maintain operational effectiveness and safety of the Motor Drive Unit MA 7.
- Ensure familiarity with electrical schematics and component roles for effective troubleshooting and maintenance.
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Description
This quiz covers the Inspection Instructions No. 68/77 related to the Motor Drive Unit MA 7. It includes general inspections, operational tests, and specific details on replacement and lubrication schedules. Perfect for technicians needing to refresh their knowledge on safe inspection practices.
