TAPMOTION MD-III Overview

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Questions and Answers

What was the last production date for the motor drive units MD-I and MD-II?

January 2015

July 2014

March 1st, 2014

December 2014 (correct)

What is the primary benefit emphasized about the TAPMOTION® MD-III?

It will be available with no time restrictions for orders.

It combines operating experience of over 100,000 units. (correct)

It has the same design as MD-I and MD-II.

It simplifies maintenance by eliminating spare parts.

When did the delivery of the new MD-III motor drive units start?

January 2015

March 1st, 2014

July 2014 (correct)

June 2014

What will happen to the supply of spare parts for MD-I and MD-II after January 2015?

Spare parts will still be available for repair and maintenance. Signup and view all the answers

What is the timeline for ordering the new MD-III units?

Orders began on March 1st, 2014. Signup and view all the answers

What is the purpose of the anti-condensation heater in the motor drive unit MD-III?

To maintain the internal temperature above the external temperature to prevent condensation Signup and view all the answers

Which type of signal is converted in the TAPMOTION® MD-III system?

Digital signals to analog signals, specifically current and resistance values Signup and view all the answers

Which statement about the position indicator modules is true?

They are easily extendable for remote position indication and can utilize various resistor types Signup and view all the answers

What feature does the bottom plate provide in the TAPMOTION® MD-III design?

It is a dummy plate that allows for cable input Signup and view all the answers

What is the benefit of having easy extendable modules in the TAPMOTION® MD-III system?

They enable customization and scalability for different applications Signup and view all the answers

What feature ensures safe maintenance access to the terminal board?

Snap lock for easy opening and closing Signup and view all the answers

What type of terminal technology is standard in the TAPMOTION® MD-III?

WAGO cage clamp technology Signup and view all the answers

Which feature provides protection against accidental contact with electrical circuits?

Touch-proof contacts Signup and view all the answers

How is the cable connection area designed in the TAPMOTION® MD-III?

Separated and touch-proof area Signup and view all the answers

What is a benefit of using WAGO cage clamps in the TAPMOTION® MD-III?

They enable standard terminals for quick connections. Signup and view all the answers

What ensures the swing panel of the TAPMOTION® MD-III closes automatically?

Automatic closing facility Signup and view all the answers

What type of terminal is offered as an optional feature in the TAPMOTION® MD-III?

Ring type screw terminal for cable lugs Signup and view all the answers

Which aspect of the TAPMOTION® MD-III allows for a tidy appearance?

Smart cable management system with ducts Signup and view all the answers

What is the purpose of the cam-operated, out-of-step contacts in the Motor Drive Unit MD-III?

To change their state upon position change Signup and view all the answers

Which contacts are activated in MR+ starting with tap change section 24?

171A and 171B Signup and view all the answers

What function does the hand crank signaling contact provide?

It disables further electrical control Signup and view all the answers

What is indicated by the end position signaling contacts when activated?

The end position has been reached Signup and view all the answers

Which of the following correctly describes the activation of contact 155 in the Motor Drive Unit?

Activated during MR+ in section 6,5 Signup and view all the answers

What type of switch do all motor drives include according to the design?

Raise/Lower selector switch Signup and view all the answers

In the context of tap changers, what risk exists that the manufacturer has warned about?

Risk of confusing the on-load tap changers Signup and view all the answers

Which contacts are activated in MR- starting with tap change section 24?

172A and 172B Signup and view all the answers

What type of additional window is available for the Motor Drive Unit MD-III?

Additional window at left door (VIM) Signup and view all the answers

Which feature increases operational security in the electrical circuit of the Motor Drive Unit MD-III?

Self-monitoring of electrical components Signup and view all the answers

What is a distinguishing characteristic of the Motor Drive Unit MD-III regarding dimensions?

Identical mounting points to MD-I & MD-II Signup and view all the answers

Which component is replaced by contactors in the electrical circuit of the Motor Drive Unit MD-III?

Relays Signup and view all the answers

Which of the following is not an option mentioned for the Motor Drive Unit MD-III's mechanical design?

Integrated force sensor for load measurement Signup and view all the answers

How does the Motor Drive Unit MD-III indicate position without a step-by-step design?

Via standard wiring assignment of T-point designation Signup and view all the answers

Which type of position indication module is specifically mentioned for the Motor Drive Unit MD-III?

Standard rotary transmitter Signup and view all the answers

Which of the following statements about the Motor Drive Unit MD-III's electrical circuit is true?

It has enhanced monitoring capabilities using microcontrollers. Signup and view all the answers

What type of special position indication requires an A/D converter in the MD-III?

Special position designations or codes Signup and view all the answers

What mechanism is used for protection against unintended passage of positions in the Motor Drive Unit MD-III?

Micro switches monitoring Signup and view all the answers

The TAPMOTION® MD-III utilizes WAGO cage clamps for quick and secure installation.

True Signup and view all the answers

The swing panel of the TAPMOTION® MD-III has no protection against electrical circuits.

False Signup and view all the answers

The TAPMOTION® MD-III includes both standard terminals for wire pin connections and screw type terminals for ring cable lugs.

True Signup and view all the answers

There is no automatic closing feature in the swing panel of the TAPMOTION® MD-III.

False Signup and view all the answers

The terminal board in the TAPMOTION® MD-III is equipped with touch-proof design components.

True Signup and view all the answers

Cable ducts in the TAPMOTION® MD-III are for aesthetic purposes only and do not serve a functional role.

False Signup and view all the answers

Wago terminals in the TAPMOTION® MD-III are a standard feature, while screw type terminals are an option.

True Signup and view all the answers

The touch proof design of the TAPMOTION® MD-III is primarily for visual appeal.

False Signup and view all the answers

The Local/Remote/Auto switch can integrate a voltage regulator in its Auto position.

True Signup and view all the answers

It is recommended to always turn off the heating to prevent water condensation on the motor drive MD-III.

False Signup and view all the answers

The main switch of the motor drive unit MD-III should be used for emergency shutoff.

False Signup and view all the answers

Socket outlets on the motor drive unit are essential for normal operation.

False Signup and view all the answers

A potential-free signaling contact is available upon customer request for the heating circuit.

True Signup and view all the answers

A customer can request a 30mA/10A ground leakage circuit breaker instead of a 10mA/10A version.

True Signup and view all the answers

The Motor Drive Unit MD-III features a window in the left door for visibility of VIM controls.

True Signup and view all the answers

The MD-III motor drive unit includes socket outlets that are specifically for 110V applications.

False Signup and view all the answers

The electrical circuit in the Motor Drive Unit MD-III includes the replacement of relays by diodes.

False Signup and view all the answers

There are limits on the number of potential-free signaling contacts available, capped at four.

True Signup and view all the answers

The Motor Drive Unit MD-III is designed to have identical mounting points to both MD-I and MD-II.

True Signup and view all the answers

The Motor Drive Unit MD-III utilizes a simple wiring method that lacks step-by-step design.

True Signup and view all the answers

Position indication modules in the Motor Drive Unit MD-III are exclusively based on analog technology.

False Signup and view all the answers

Standard options for the Motor Drive Unit MD-III include a provision for TC150.

False Signup and view all the answers

Position indication can involve special codes that necessitate an A/D converter in the Motor Drive Unit MD-III.

True Signup and view all the answers

The Motor Drive Unit MD-III's electrical circuit guarantees unintended operation through non-mechanical means.

False Signup and view all the answers

The Motor Drive Unit MD-III allows for a one-size-fits-all compatibility with existing RMV's.

True Signup and view all the answers

An additional window in the cover plate of the transmission gear is not an option for the Motor Drive Unit MD-III.

False Signup and view all the answers

The maximum number of cam switches that can be installed in the MD-III is 12.

True Signup and view all the answers

10 A plates require less space compared to 1 A plates in the MD-III.

False Signup and view all the answers

Directional cam switches change their state in both directions during operation.

False Signup and view all the answers

Non-directional cam switches return to their original position at the end of a position change.

True Signup and view all the answers

For the MD-III, the maximum quantity of position transmitter plates with a resolver is 4.

False Signup and view all the answers

The switching procedure for non-directional cam switches is always asymmetric.

False Signup and view all the answers

Position signals in MD-III are reported regardless of voltage by the cam switches.

True Signup and view all the answers

At the start of a position change, both directional and non-directional cam switches are activated.

True Signup and view all the answers

The over voltage relay in the control circuit can detect an under voltage failure.

False Signup and view all the answers

Coupling relays are mandatory for using a different pulse voltage than the control voltage.

False Signup and view all the answers

A message is generated if the motor drive run time exceeds 5 seconds.

False Signup and view all the answers

The incomplete circuit measures the time necessary for a motor drive to complete a position change.

True Signup and view all the answers

Two potential-free signaling contacts are optional and usually not included in the unit.

False Signup and view all the answers

Coupling relays only function with AC voltage for raise/lower operation.

False Signup and view all the answers

The time measured for a motor drive run is exactly 3 seconds with no tolerance.

False Signup and view all the answers

The usage of an incomplete circuit is solely for signaling purposes and does not affect the operational state.

False Signup and view all the answers

Study Notes

TAPMOTION MD-III Overview

Introducing the TAPMOTION® MD-III motor drive unit, a new concept for moving Load Tap Changers (LTCs).
Built on 25 years of experience with vacuum reactor LTCs.
Development timeline includes the MD-I, MD-II, and now MD-III.

Transition and Production

Production of MD-I and MD-II continues until December 2014 with MD-III launched for orders starting March 1, 2014.
Discontinuation of MD-I and MD-II production slated for January 2015 after a six-month transition.
Spare parts will remain available for MD-I and MD-II; complete units can be ordered only in emergencies post-discontinuation.

Key Features of MD-III

Combines knowledge from over 100,000 motor drive units in its design for enhanced functionality.
Equipped with a non-resettable operation counter and tap change indicator.

Modular Concept Design

Features a separated, touch-proof terminal board with neat cable ducts for easy connections.
WAGO cage clamps used for quick installation and safety, ensuring secure connections without touching live parts.
Swing panel allows easy access with protective functionalities.

Position Indicator and Signal Modules

Offers extendable modules for remote position indication including various resistor types.
Analog signal output of 4…20mA, facilitating digital to analog signal conversion with ease.

Anti-Condensation Features

Includes a permanent heater to prevent internal condensation by maintaining higher internal temperatures.
Equipped with a thermostat-controlled additional heater suitable for arctic conditions.

Compatibility and Assembly

Designed for direct mounting below LTCs with a “one design fits all” approach ensuring compatibility with existing RMVs.
Identical mounting points to MD-I & MD-II assist in straightforward transition.

Electrical Circuit Enhancements

Replaces relays with contactors to improve operational security through self-monitoring.
Includes protections against unintended position changes with designated T-point functions.
Advanced wiring supports numerous types of position indication modules and resistor configurations.

Contact and Signal Features

Features out-of-step contacts and signaling for end positions to ensure operational accuracy.
Hand crank signaling contacts facilitate manual control for operators with built-in alerts.

Switches and Control

Each motor drive comes with a raise/lower selector switch alongside options for additional control switches based on client needs.
The design encourages safety by minimizing the potential for operational mix-ups.

Dimensions and Options

Compatible assembly dimensions allow for simple integration into existing systems.
Various options available for mechanical design, electrical circuits, and auxiliary equipment to meet customer specifications.

These notes highlight the essential components and features of the TAPMOTION MD-III, capturing its innovations and operational capabilities for efficient LTC movement.

TapMotion® MD-III Overview

Non-resettable operation counter and a change indicator for tap position in progress.
New modular design enhances functionality and ease of use.

Terminal Board Features

Touch-proof and separated areas for safety within the housing.
Cable ducts maintain organization and facilitate easy connections.
WAGO cage clamps support quick installation and ensure touch-proof design.
Straightforward access to essential connection points.

Terminal Blocks

Standard WAGO cage clamp technology and optional UK5N screw type terminals.
Support for wire pin connections and ring cable lugs.
All terminals designed for easy connection and secured against accidental touching.

Swing Panel Benefits

Quick access to terminals through a snap lock mechanism.
Direct touch protection applied to all electrical circuits.
Automatic closure feature for added safety.

Motor Drive Unit MD-III Assembly

Compatible mounting with existing RMV units; "one design fits all."
Ground level mounting for practical installation.

Dimensions and Design

Identical mounting dimensions to previous models (MD-I & MD-II).
Options for additional features such as extra viewing windows.

Standards and Options

Diverse options for mechanical design and electrical components, including heaters and control circuits.
Customization for auxiliary and supply circuits.

Electrical Circuit Innovations

Simplification through replacement of relays with contactors.
Enhanced operational security with the self-monitoring of electrical components like micro switches and contactors.

Position Indication Systems

Multiple position indication modules available including resistor type and rotary transmitters.
Special position transmitter modules require A/D converters for custom designations.

Cam Switches

Mechanically activated cam switches report the current positional state reliably.
Options for directional and non-directional switches, affecting operation during position changes.

Switch Types

Local/Remote/Auto switch allows for integration with voltage regulators.
Heater switch protects against water condensation; vital for equipment longevity.
Main switch controls various current circuits; not intended for emergency shutdowns.

Power Outlets

Socket outlets primarily serve maintenance work; equipped with ground leakage circuit breakers for safety.
Customizable options include different types of breakers and specifications.

Auxiliary Circuits

Over-voltage and under-voltage relay contacts included in control circuits to safeguard operations.
Coupling relays allow for decoupling control signals, broadening operational flexibility.

Safety Features

Incomplete circuit monitoring measures time for motor operation during position changes to prevent malfunctions.
Potential-free signaling contacts available for various circuits, enhancing control options.

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Description

Explore the innovative features of the TAPMOTION® MD-III motor drive unit. With 25 years of expertise in vacuum reactor LTCs, this new design marks a significant advancement in motor drive technology. Understand how the MD-III fits into the evolution of the TAPMOTION series.