Motor Drive Unit MA 7 Inspection Instructions

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Questions and Answers

What is the primary focus of the inspection instructions documented in Inspection Instructions No. 68/77?

Operational efficiency of the motor drive unit

Maintenance of the motor safety switch

Step-by-step control mechanisms

General inspections of the motor drive unit (correct)

Which component is addressed under the operational tests section?

Ground connections

Limit switches (correct)

Lubricating schedule

Protective housing

Which of the following components is explicitly mentioned for replacement in the document?

Driving motor (correct)

Ground connections

Transmission gear

Protective housing

What type of inspections are outlined in section 2.1?

Protective housing inspections Signup and view all the answers

In the context of lubrication, what is the maximum page number on which the lubricating schedule is found?

Page 10 Signup and view all the answers

Which inspection component is situated in section 3.3?

Safety circuit Signup and view all the answers

What is described in the appendix section of the inspection instructions?

Miscellaneous supplementary information Signup and view all the answers

Which operational test involves manual control of the motor?

Motor safety switch for manual operation Signup and view all the answers

What function does the 'motor protective switch' serve in the motor drive unit MA 7?

Protects the motor from overloads Signup and view all the answers

Which component is responsible for providing a manual operation safety feature in the motor drive unit?

Safety switch Signup and view all the answers

Which type of activation does the push-button labeled 'LOWER' provide?

Activates the motor drive for downward movement Signup and view all the answers

What is the primary role of cam switches in the motor drive system?

For step-by-step control operation Signup and view all the answers

How long does it typically take to inspect the motor drive if no parts need replacing?

About 1 hour Signup and view all the answers

What does the position transmitter do within the motor drive unit?

Provides feedback on the motor's current position Signup and view all the answers

Which feature is associated with the braking contactor in this context?

Initiates immediate motor stopping Signup and view all the answers

What is the function of the limit switches in the motor drive unit?

To restrict the motor's operational range Signup and view all the answers

What is the primary function of the 'Motor contactors' in the given content?

To control the flow of electrical current to motors Signup and view all the answers

In the context of a 'Signalling lamp', which situation would it most likely indicate?

The system is transitioning to a standby state Signup and view all the answers

What type of relay is specifically mentioned for step-by-step control?

Bremsschitz relay Signup and view all the answers

Which component is likely responsible for providing heating in a space?

Heizwiderstande Signup and view all the answers

What is a likely function of the 'Lautlampe' mentioned in the content?

To provide audible feedback on operational status Signup and view all the answers

Which terminal is designated for parallel control of positions?

Terminal L1.271Gr Signup and view all the answers

Which type of contact is involved in the passage of positions?

Durchlaufikontakt Signup and view all the answers

Which lamp is associated with indicating 'change in progress'?

Warts Lautlampe Signup and view all the answers

What is the diameter and length of the HEX. HEAD SCREW M5 x 50?

5 mm diameter, 50 mm length Signup and view all the answers

Which of the following is not a type of screw listed?

Pan Head Screw Signup and view all the answers

Which nut corresponds with the 451 250 code?

Hex Nut M4 Signup and view all the answers

Identify the code associated with the CHEESE-HEAD SCREW M 4 x 10.

450 841 Signup and view all the answers

What is the common feature of the items categorized as 'LOCK WASHER' in the provided content?

They all secure screws in rotating applications. Signup and view all the answers

Which component has a dimension of 12 mm x 28 mm x 8 mm?

Ball Bearing Signup and view all the answers

Which of the following items is likely used for securing two components together in a machine?

Hex Nut M6 Signup and view all the answers

Which is true about the CIRCLIP LOCK RING dimensions listed?

Each CIRCLIP LOCK RING has a unique diameter and width. Signup and view all the answers

What is the purpose of the direction-dependent signal lamps?

To provide feedback on direction memory Signup and view all the answers

What should be done if direction memory signal lamps are installed?

Remove link L1.19=20 Signup and view all the answers

Which component is indicated as a fin de course switch?

Interruttore de fin de course pour cl/c2 Signup and view all the answers

Which component functions as a locking switch?

Interruttore di vorrouillage Signup and view all the answers

What is the role of the bouton-poussoir in the system?

To trigger a specific action or event Signup and view all the answers

What does the term 'contacts actionnis par cames' refer to?

Mechanical switches operated by cams Signup and view all the answers

Which of the following buttons is used for operational triggering?

Pulsante per cl/e2 Signup and view all the answers

What does 'pulsante per ct/e2sala' suggest about its function?

It is intended for specific control tasks Signup and view all the answers

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.