Course Title: Solve problems in complex polyphase power circuits

Part B: Course Detail

Teaching Period: Term1 2009

Course Code: EEET6788C

Course Title: Solve problems in complex polyphase power circuits

School: 130T Vocational Engineering

Campus: City Campus

Program: C6085 - Advanced Diploma of Electrical - Technology

Course Contact: Marko Dumovic

Course Contact Phone: +61 3 9925 4342

Course Contact Email: marko.dumovic@rmit.edu.au


Name and Contact Details of All Other Relevant Staff

Nominal Hours: 60

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

UEENEEG048A Solve problems in complex multiple path power circuits

Course Description

This unit covers procedures for determining correct operation of complex polyphase power circuits and providing solutions as they apply to electrical power engineering work functions. It encompasses working safely, problem solving procedures, including using electrical measuring devices, applying appropriate circuit theorems and providing solutions derived from measurements and calculations and justification for such solutions.


National Codes, Titles, Elements and Performance Criteria

National Element Code & Title:

UEENEEG049B Solve problems in complex polyphase power circuits

Element:

1. Prepare to solve problems in complex polyphase power circuits.
2. Solve problems in complex polyphase power circuits.
3. Complete work and document problem solving activities.

Performance Criteria:

 

1 1.1 OHS procedures for a given work area are identified, obtained and understood.
1.2 OHS risk control work preparation measures and procedures are followed.
1.3 The nature of the circuit(s) problem is obtained from documentation or from work supervisor to establish the scope of work to be undertaken.
1.4 Advice is sought from the work supervisor to ensure the work is coordinated effectively with others.
1.5 Sources of materials that may be required for the work are established in accordance with established procedures.
1.6 Tools, equipment and testing devices needed to carry out the work are obtained and checked for correct operation and safety.



2 2.1 OHS risk control work measures and procedures are followed.
2.2 The need to test or measure live is determined in strict accordance with OHS requirements and when necessary conducted within established safety  procedures.
2.3 Circuits are checked as being isolated where necessary in strict accordance OHS requirements and procedures.
2.4 Established methods are used to solving circuit problems from measure and calculated values as they apply to complex multiple path circuit.
2.5 Unexpected situations are dealt with safely and with the approval of an authorised person.
2.6 Problems are solved without damage to apparatus, circuits, the surrounding environment or services and using sustainable energy practices.

3.1 OHS work completion risk control measures and procedures are followed.
3.2 Work site is cleaned and made safe in accordance with established procedures.
3.3 Justification for solutions used to solve circuit problems is documented.
3.4 Work completion is documented and an appropriate person or persons notified in accordance with established procedures.


Learning Outcomes



Details of Learning Activities

Classroom tutorial activities to consolidate the theory of concepts of three phase power circuit analysis. Activities involve theoretical and practical exercises of polyphase power circuit analysis, complex power single and three phase circuits, balanced and unbalanced loads, three phase loads, line voltage drops, neutral currents, fault currents, fault loop impedance and transformer percentage impedance.

Practical activities to develop skill in software applications for calculation fault levels and voltage drops and verification of results with circuit simulation softwares: PSPICE and Multisim.

Projects on analysis of induction motor and transformer equivalent circuits and calculations of voltage drops, fault currents and application of Australian Standards for determination of Fault Loop Impedance
may be undertaken as part of a team or individual basis.


Research activities require approximately 20% of course nominal hours to be allocated for independent study to do project research, design, construction, testing and problem solving activities.

The skills and knowledge described in this unit require a licence to practise in the workplace where plant and equipment operate at voltage above 50 V .

This unint covers follwing Essential Knowledge & Associated Skills elements:

2.8.9.3 Polyphase power circuit analysis
2.18.1 Occupational Health and Safety principles
2.18.2 Electrical Safe working practices


Teaching Schedule

Week Number and Topic                                                                                                                    Assessment Task

1 Polyphase systems, Three Phase Y/D connected generators
2 Phase Sequence Determination, Balanced three phase loads
3 Power in three phase system
4 Unbalanced three phase loads
5 Transformer equivalent electrical circuit                                                                                             Practical 10%
6 Transformer percentage impedance, fault currents                                                                         Project 20%
7 Fault currents in Multiple Earthing Neutral system
8 Symmetrical faults, Fault loop impedance
9 Solving problems in complex polyphase power circuits                                                                  Test 1      20%
10 Asymmetrical faults
11 Voltage drops
12 Voltage drops , Software simulation Multisim, PSPICE                                                                 Practical 10%
13 Induction motor equivalent circuit
14 Harmonics
15 Solving problems in complex polyphase power circuits. PSPICE, Multisim
16 Solving problems in complex polyphase power circuits. PSPICE, Multisim
17 Determining the operating parameters of existing circuit                                                              Test 2   40%
18 Feedback and catchup test


Learning Resources

Prescribed Texts


References

-Boylestad, “Introductory Circuit Analysis”, Prentice Hall
-ASNZ3000 Wiring Rules


Other Resources

RMIT online learning resources are located on RMIT Online Learning Hub.
Follow the link to log in http://www.rmit.edu.au
The Learning Hub ( Blackboard) is the central point of access to the online courses in which students are registered.


Overview of Assessment

This course will be assessed through a range of practical exercises, assignments and progressive tests.


Assessment Tasks

Progressive Tests 60%
Written assessment to demonstrate an understanding of polyphase power circuit analysis, complex power single and three phase circuits, balanced and unbalanced loads, three phase loads, line voltage drops, neutral currents, fault currents, fault loop impedance and transformer percentage impedance.

Practical exercises 20%
Practical activities in verifying calculations using simulation software for fault level calculations, voltage drops, motor and transformer equivalent electrical circuits.

Practical Exercises will be assessed progressively according to individual task criteria. All practical exercises must be:
- Undertaken according to safe working practice as specified by the School.
- Perform according to specified laboratory standards and practice including calibration, measurement and accurate reading.

Project 20%
Analysis of induction motor and transformer equivalent circuits and calculations of voltage drops, fault currents and application of Australian Standards for determination of Fault Loop Impedance may be undertaken as part of a team or individual basis.


Assessment Matrix

 

 

                                                                                                                                                                        Assessment Types

Competency National Code                                      Competency Title     Practical Exercises AssignmentProject/
Presentation
Tests Industrial
Practice
UEENEEE049B Solve problems in complexpolyphase power circuits                                                                               X XX 

 X X X

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