Course Title: Motor Protection and Control

Part B: Course Detail

Teaching Period: Term2 2009

Course Code: EEET6225L

Course Title: Motor Protection and Control

School: 130T Engineering (TAFE)

Campus: City Campus

Program: C6050 - Advanced Diploma of Electrical Engineering

Course Contact : Marko Dumovic

Course Contact Phone: +61 3 99254342

Course Contact

Name and Contact Details of All Other Relevant Staff

William Lau, Senior Educator  -Electrotechnology, (03) 9925 4703

Nominal Hours: 80

Regardless of the mode of delivery, represent a guide to the relative teaching time and student effort required to successfully achieve a particular competency/module. This may include not only scheduled classes or workplace visits but also the amount of effort required to undertake, evaluate and complete all assessment requirements, including any non-classroom activities.

Pre-requisites and Co-requisites

Circuit Theory

Course Description

Students will develop specific skills and knowledge required to work safely in the applications of motor protection and control circuits. It includes the principles of operation and control of various types of motors and practical application of various motor protection devices.

National Codes, Titles, Elements and Performance Criteria

National Element Code & Title:

UTENES406BA Develop complex testing & evaluation procedures


Students are expected to meet performance requirements of the competency (and its elements)
UTE NES 406 bA – Develop complex testing and evaluation procedures- Electrical :
* 406.1 Plan & prepare for the development of (basic) testing and evaluation procedures
* 406.2 Develop (basic) testing procedures
* 406.3 Completion of work

Performance Criteria:

Students are expected to meet performance requirements of the competency (and its elements)
UTE NES 406 bA – Develop complex testing and evaluation procedures- Electrical :
* 406.1 Plan & prepare for the development of (basic) testing and evaluation procedures
* 406.2 Develop (basic) testing procedures
* 406.3 Completion of work
NES406bA Develop Complex Testing & Evaluation Procedures- Electrical
* 406.1 Plan & prepare for the development of complex testing and evaluation procedures:
-Consult with all team members & instructor.
-Compile written specifications of circuit/ system performance base on available information from the task requirement.
* 406.2 Develop complex testing procedures:
-Develop a comprehensive range of testing procedures to fully verify the performance specifications of a motor control circuit/system.
-Select appropriate test and measurement apparatus. Calibrate the selected apparatus in accordance to the standard
-Evaluate the key specifications of test and measurement apparatus and their suitability.
-Perform trial test sequence to verity test procedure.
* 406.3 Completion of work
-Produce a written laboratory test procedure outlining the sequence of the test, the used apparatus and circuit diagram

Learning Outcomes

Details of Learning Activities

Students will participate face to face in involving design and construction of simple electrical motor control circuits and participate in research project in the application of different control devices for various electrical motors. It involves the development of testing procedure to verify the performance specification, diagnosis of faults in the systems and completion of the commission.

Learning Activities:
Students will participate face to face in

* Classroom tutorial activities to consolidate the theory of three-phase electrical systems, operating principles of single-phase motor, three-phase motor, DC motor and universal motor, controlling devices for various motors, various motor protection devices.

* Practical activities to conduct research project to investigate control devices for various types of electrical motors, and various motor protection device applications. It develops students’ practical skills in simulation and testing of various motor control devices and different motor protections.

* Work performance laboratory exercise involving circuit design, construction and testing of a simple controlling device for specified electrical motor, establish testing procedure to verify the specification, diagnosis of faults in the systems and completion of the commission. Specifications will be provided with work simulation (team or individual basis) or may be negotiated to suit a workplace based application
Projects may be undertaken as part of a team or individual basis.

It is expected that students would require approximately 20% of course hours to be allocated for independent study to do project research, design, construction, testing and problem solving activities.



Course Content :

Review OH&S practice in Electrical Industry

Three-phase electrical systems
- three-phase concepts
- three-phase induction motor construction and operating principles
-analysis of three-phase induction motor using equivalent circuit
- three-phase induction motor starting and braking techniques
- three-phase synchronous motor construction and operating principles
- three-phase synchronous motor starting and braking requirements

Single-phase motor & three-phase motors

- Equivalent electrical circuit of induction motor
- construction and operating principles
- motor parameters
- motor dynamics

Motor starting and reversing
- Motor Starters
Universal & DC motor
-construction and operating principles
- motor dynamics

Control device for various types of motors
- speed control
- torque control
- principles and selection of a.c. drives
- drive systems with controller
- variable speed drives
- acceleration time
- intermittent loads

Motor protection devices

• - types of motor protection including short-circuit and overload protections
• - HRC fuse versus MCCB
• - selection of thermal overload device
• - protection of small motors
• - protection of large induction motors
• - coordination of protective equipment for induction motors
Variable speed drives

Teaching Schedule

Topic weekly breakdown
Week                        Topic
Week 1 Introduction to course, course guide, assessment, topics breakdown, resources, OHS issues. Electromagnetism, Electric Motor Principles of Operation,
Week 2 Motor construction, Rotating magnetic field, Speed toque characteristics
Week 3 Electric Motor Parameters, Interpreting Manufacturers Data,
Week 4 Determining Induction Motor Equivalent Circuit Parameters,

Week 5 Contactors , DOL Starting and Reversing Induction Motors
Week 6 Primary Resistance Starters, Autotransformer Starters
Week 7 Star Delta Starters, Revision
Week 8 Progressive Test 1,
Week 9 DC Injection and Plug Braking, , Motor Dynamics
Week 10 Single Phase Motors, Split Phase Motors, Shaded Pole Motors
Week 11 Capacitor Start/Run Motors, Synchronous Motors
Week 12 Speed Control of Induction Motors, Selection of AC motors,
Week 13 DC Motors, Types, Speed control
Week 14 Universal Motor, Motor Protection
Week 15 Variable Speed Drives, Commissioning Procedures of Motor Drives
Week 16 Revision, Development of complex testing and evaluation procedures
Week 17 Progressive Test 2
Week 18 Assessment feedback, catch-up test, laboratory work catch-up.

Learning Resources

Prescribed Texts

Marko Dumovic, Motor Protection and Control, RMIT, Engineering Education Australia, 2000

J.R. Jennesson, Electrical Principles for electrical Trades, McGraw Hill, 2001

Theodore Wildi, Electrical Machines Drives and Power Sytems, Prentice Hall, 2000


Other Resources

Motor Protection and Controls: Learning Materials compiled by William LAU

Additional on line resources can be found on :!OpenDatabase&mt=&l=us
RMIT Library student guide will provide you with starting points for finding information on electrical and electronic topics including topics such as electrical instrumentation, automation and control, electrical renewable energy

Overview of Assessment

• Two progressive tests.
• Practical performance in laboratory exercises

Assessment Tasks

Assessment requirements include:

- attendance and satisfactory completion of prescribed practical exercises , which may be scheduled during the day or evening depending on the demand.
- evidence of participation in and satisfactory completion of work simulation projects.
- satisfactory completion of class assignment work
- progressive tests
- timely submission and standard presentation for all assessment material / documentation

Assessment activities will be as close as practicable to real work situations and will require “real work” type decision making by the student. Evidence of competent performance shall be gathered from:

• Work Performance Simulation Exercises

When performing the simulations, students must demonstrate ability to:

* Organise and manage the tasks within the simulations
* Cope with any contingencies that arise during the simulations and solve inherent problems
* Perform tasks autonomously and/or as a member of a team as task proscribes
* Perform task and manage work environment/equipment according to safe working practice and OH&S requirements.
* Meet assessment criteria, conditions and technical requirement relevant to the competency standard detail above.

• Practical exercises

These will be assessed progressively according to individual task criteria. All laboratory exercises must be:
- Undertaken according to safe working practice as specified by the School.
- Performed according to specified laboratory standards and practice including calibration, measurement and accurate reading. This must include electrical measurement taken with safe working practice, meters properly calibrated, meter settings positioned for an accurate reading and accurate readings taken for all measurements.

• Progressive and Validation Tests

Theoretical concept underpinning measurement and testing procedures will be assessed progressively in tests throughout the unit. A written/oral validation test will also apply to aspects of projects done in groups

Although this learning unit will be assessed on completion, the competency itself will not be signed off until this and further learning units are completed and the student is deemed competent.

Assessment Matrix

• Two progressive tests. (70%)
• Practical performance in laboratory exercises 30 %

Course Overview: Access Course Overview