Course Title: Solve problems in low voltage a.c. circuits

Part B: Course Detail

Teaching Period: Term2 2013

Course Code: EEET7027C

Course Title: Solve problems in low voltage a.c. circuits

School: 130T Vocational Engineering

Campus: City Campus

Program: C6120 - Advanced Diploma of Engineering Technology - Electrical

Course Contact: Program Manager

Course Contact Phone: +61 3 9925 4468

Course Contact Email: vocengineering@rmit.edu.au


Name and Contact Details of All Other Relevant Staff

Rand Gorgis
Ph: 99254378
Fax: (03) 99254377
Email: rand.gorgis@rmit.edu.au

Gita Pendharkar
Ph: 99254701
Fax: (03) 99254377
Email: gita.pendharkar@rmit.edu.au

Kemps Cheng
Ph: 99254691
Fax: (03) 99254377
Email: kemps.cheng@rmit.edu.au

Ted Bown
Ph: 99254694
Fax: (03) 99254377
Email: ted.bown@rmit.edu.au

Noor Sateh
Ph: 99254013
Fax: (03) 99254377
Email: noor.sateh@rmit.edu.au


 

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

UEENEEE101A + UEENEEE104A + UEENEEG101A

Course Description

This unit covers ascertaining correct operation of single and three phase a.c. circuits and solving circuit problems as they apply to servicing, fault finding, installation and compliance work functions. It encompasses safe working practices, multiphase circuit arrangements, issues related to protection, power factor and MEN systems and solutions to circuit problems derived from calculated and measured parameters.


National Codes, Titles, Elements and Performance Criteria

National Element Code & Title:

UEENEEG102A Solve problems in low voltage a.c. circuits

Element:

1. Prepare to solve low voltage a.c. circuit problems.

Performance Criteria:

1.1 OHS procedures for a given work area are identified, obtained and understood.
1.2 Established OHS risk control measures and procedures in preparation for the work are followed.
1.3 Safety hazards, which have not previously been identified, are noted and established risk control measures are implemented.
1.4 The nature of the circuit(s) problem is obtained from documentation or from work supervisor to establish the scope of work to be undertaken.
1.5 Advice is sought from the work supervisor to ensure the work is coordinated effectively with others.
1.6 Sources of materials that may be required for the work are established in accordance with established procedures.
1.7 Tools, equipment and testing devices needed to carry out the work are obtained and checked for correct operation and safety.

Element:

2. Solve low voltage a.c. circuit problems.

Performance Criteria:

2.1 OHS risk control measures and procedures for carrying out the work 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/machines/plant are checked as being isolated where necessary in strict accordance OHS requirements and procedures.
2.4 Established methods are used to solve circuit problems from measure and calculated values as they apply to single and three-phase low voltage 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.
 

Element:

3. Complete work and document problem solving activities.

Performance Criteria:

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


Refer to Elements


Details of Learning Activities

 

Classroom tutorial activities to consolidate the theory of concepts
Practical activities applied, with problem solving and related questions to develop skills in safe testing.
Projects may be undertaken as part of a team or individual basis.
Participate in individual and team problem solving scenarios/role plays/ case studies and participate in supervised workshop practice in simulated workplace environment dealing with a range of practical exercises related to:
1. Using of the CRO to measure a.c. voltage levels
2. Using of the CRO to measure ’period’, ’maximum value’, ’peak-to-peak value’, ’instantaneous value’, ’average value’, ’root-mean-square (r.m.s.) value’, in relation to a sinusoidal waveform.
3. Phasor diagrams to show the relationship between two or more a.c. values of voltage and/or current.
4. Ohm’s Law to determine voltage, current of inductive and capacitive reactance i
5. RC and RL Series a.c. circuits
6. RLC Series and Parallel a.c. circuits

The application of the skills and knowledge described in this unit require a license to practice in the workplace where work is carried out on electrical equipment or installations which are designed to operate at voltages greater than 50 V a.c. or 120 V d.c.
Other conditions may apply under State and Territory legislative and regulatory requirements.
 


Teaching Schedule

Teaching Schedule for ET1A & ET1B:

Week Number
 
Topic Delivered
 
Assessment Task
 
1              AC Fundamentals


Periodic voltage, current, phase angle and waveforms.

Introduction to Lab Equipment.
OHS obligations and safe behaviour in lab;

Introduction to MultiSim software

 

2             AC Fundamentals

Calculating peak-to-peak, instantaneous value, average and RMS values, frequency and phase angle (lead/lag) of sine waveforms

 

Tutorial # 1
3             Phasors


Perform addition, subtraction, multiplication and division with complex phasors
Interpret the resulting amplitude and time (phase).
Conjugate of complex phasors.
Time and frequency domain expressions
 

Tutorial # 2
4            Single Element a.c. circuits

Response of Basic R,L, and C to AC voltage & current
Inductive reactance
Capacitive reactance

 

Lab #1 (2 %)
5            RC and RL Series a.c. circuits


Calculations on
R-L series circuit
and
R-C series circuit

 

Tutorial # 3
6             RLC Series a.c. circuits


calculation of impedance, voltage and current for a series RLC circuit
R-L-C in series

 

Lab #2 (2 %)
7            RC and RL Parallel a.c. circuits


Calculations on
R-L parallel circuit
and
R-C parallel circuit

 

Tutorial 4
8            RLC parallel a.c. circuits


calculation of impedance, voltage and current for a parallel RLC circuit
R-L-C in parallel

 

Lab # 3 (2 %)
9            AC power


Power in an a.c. circuit
 

Written Test
(20%)
Project Based Assignment
10%
Available on Blackboard
 
10            Power Factor


Requirements for power factor improvement.
Methods used to improve low power factor of an installation

 

Lab # 4 (2 %)
11           Harmonics and Resonance Effect in a.c. Systems


Series resonance
Parallel resonance

 

Lab # 5 (3 %)
12             Three Phase Systems


Three phase star-connections

 

Lab # 6 (3 %)
13            Three Phase Systems


Three phase four wire systems
 

Lab # 7 (3 %)
14             Three Phase Systems


Three phase delta-connections and Interconnected systems

 

Lab # 8 (3 %)
15            Energy and power requirements of a.c. systems
 
Tutorial 5
16            Fault Loop Impedance of a.c. power system


measurements and testing

 

Project (10%)
Due
 
17/18Final written exam in Centralised Exam Period
either in Week 17 or Week 18
 
 

 

 

Teaching Schedule for MET1:             

Week Number
 
Topic DeliveredAssessment Task
1              AC Fundamentals

Periodic voltage, current, phase angle and waveforms.
 

Introduction to Lab Equipment.
OHS obligations and safe behaviour in lab;
Introduction to MultiSim software

 

2

            Complex Number
Introduction of comples number

 
3            Complex Number
Conversion between Rectangular form and Polar form
 
4

            Complex Number
Conversion between Rectangular form and Polar form

 
5            Complex Number
Addition and Subtraction of Complex Number in rectangular form
 
6

            Complex Number
Multiplication and Division of Complex Number in Rectangular form

 
7            Complex Number
Multiplication and Division of Complex Number in Rectangular form
 
8           Complex Number
Multiplication and Division of Complex Number in Polar form
 
9           AC Fundamentals
Calculating peak-to-peak, instantaneous value, average and RMS values, frequency and phase angle (lead/lag) of sine waveforms
 

 Lab #1 (2 %)
Tutorial 1

10           Phasors

Perform addition, subtraction, multiplication and division with complex phasors
Interpret the resulting amplitude and time (phase).
Conjugate of complex phasors.
Time and frequency domain expressions

           Single Element a.c. circuits
Response of Basic R,L, and C to AC voltage & current
Inductive reactance
Capacitive reactance

 

 

 

 Lab #2 (2 %)
Tutorial 2
11           RC and RL Series a.c. circuits

Calculations on
R-L series circuit
and
R-C series circuit
 

            RLC Series a.c. circuits

calculation of impedance, voltage and current for a series RLC circuit
R-L-C in series

 

 Lab #3 (2 %)
12            RC and RL Parallel a.c. circuits

Calculations on
R-L parallel circuit
and
R-C parallel circuit

            RLC parallel a.c. circuits

calculation of impedance, voltage and current for a parallel RLC circuit
R-L-C in parallel

 

 

 

 Lab #4 (2 %)
Tutorial 3

Project Based Assignment
10%
Available on Blackboard

13           AC power

Power in an a.c. circuit

           Power Factor

Requirements for power factor improvement.
Methods used to improve low power factor of an installation

 

 

 

 Lab #5 (3 %)
 

 Lab 6 (3 %)

Tutorial 4

14          Harmonics and Resonance Effect in a.c. Systems

Series resonance
Parallel resonance

          Three Phase Systems

Three phase star-connections

 

 

 

 Lab #7 (3 %)

Lab #8 (3 %)

15           Three Phase Systems

Three phase four wire systems

Three phase delta-connections and Interconnected systems

 

 
16

            Energy and power requirements of a.c. systems
 

             Fault Loop Impedance of a.c. power system

measurements and testing

 

 Tutorial 5

Project (10%)
Due
 

17/18Final written exam in Centralised Exam Period
either in Week 17 or Week 18
 
 


Learning Resources

Prescribed Texts

Introductory Circuit Analysis
By: Robert L. Boylestad

0-13-173044-4


References

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.
 


Other Resources

Tutorial and Laboratory Instruction sheets will be available online (using Online Learning Hub) and student’s local drive


Overview of Assessment

The assessment is conducted in both theoretical and practical aspects of the course according to the performance criteria set in the National Training Package. Assessment may incorporate a variety of methods including written/oral activities and demonstration of practical skills to the relevant industry standards. Participants are advised that they are likely to be asked to personally demonstrate their assessment activities to their teacher/assessor. Feedback will be provided throughout the course. To successfully complete this course you will be required to demonstrate competency in each assessment task detailed under Assessment Tasks:

Assessment 1: Laboratory Exercises

Weighting towards final grade (%): 20

Assessment 2: Project based Assignment
Weighting towards final grade (%): 10

Assessment 3: Written Test
Weighting towards final grade (%): 20

Assessment 4: Written Exam
Weighting towards final grade (%): 50

These tasks assesses the following Course Learning Outcomes (CLOs):

 Assessment Mapping Matrix

Element/Performance CriteriaLaboratory exerciseProjectExam & Test
1.1xxx
1.2XX 
1.3XX 
1.4XXX
1.5XX 
1.6XX 
1.7XX 
2.1XXX
2.2XX 
2.3XX 
2.4XXX
2.5XXX
2.6XXX
3.1XX 
3.2X X 
3.3XXX
3.4XXX

 

 

 


Assessment Tasks

1. Laboratory exercises (20%)
Each student will complete 8 practical exercises designed to reinforce the theory topics taught during the semester.
Most practical exercises consist of two major parts:
Part A is a prior task includes only calculations (usually pre requisite for part B) and part B include measurements and graphs.
The results obtained in part B will be reviewed and compared with the calculations from section A.
These will be assessed progressively according to individual task criteria and each student is required to complete all the parts/tasks for each laboratory exercise.
All laboratory exercises must be undertaken according to safe working practice and 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.
2. Project based assignment (10%)
An assignment has to be undertaken toward the end of the unit, in a controlled environment for the specified duration in order to perform tasks autonomously.
The assignment circuits can be constructed using either hard ware or MultiSim (design / test) simulation computer package. Each student will complete all parts of the assignment individually and will be asked by the supervisor to demonstrate that the circuit is functioning according to specifications. Each student is required to complete a written report includes three major parts: calculations, circuit diagrams / measurement and results / conclusion.
3. Written Test (20%)
Theoretical concept covered in weeks 1 to 8 will be assessed by a written test in week 9 (for ET1A and ET1B only). 
For MET 1 group,theoretical concept covered in weeks 1 to 8 will be assessed as part of the written final exam.
4. Written Exam (50%)
Theoretical concept covered in weeks 9 to 16 will be assessed by a written Exam in week 17 / 18 (exams period).
 


Assessment Matrix

 

 

Competency National
Code
 

Competency Title

Assessment Types

UEENEEG102A
 
Solve problems in low voltage a.c. circuitslabAssignmentProject/
Presentation
 
TestIndustrial
practice
 
XX X 

Other Information

Minimum student directed hours are 16 in addition to 64 scheduled teaching hours. Student directed hours involve completing activities such as reading online resources, project, preparing for test and exam, student teacher course related consultation, and reports.
 

Study and learning Support:
Study and Learning Centre (SLC) provides free learning and academic development advice to you.
Services offered by SLC to support your numeracy and literacy skills are:
Assignment writing, thesis writing and study skills advice
Maths and science developmental support and advice
English language development
Please Refer http://www.rmit.edu.au/studyandlearningcentre to find more information about Study and learning Support

Disability Liaison Unit:
If you are suffering from long-term medical condition or disability, you should contact Disability Liaison Unit to seek advice and support to complete your studies.
Please Refer http://www.rmit.edu.au/disability to find more information about services offered by Disability Liaison Unit

Late submission:
If you require an Extension of Submittable Work (assignments, reports or project work etc.) for 7 calendar days or less (from the original due date) and have valid reasons, you must complete and lodge an Application for Extension of Submittable Work (7 Calendar Days or less) form and lodge it with the Senior Educator/ Program Manager.
The application must be lodged no later than one working day before the official due date. You will be notified within no more than 2 working days of the date of lodgement as to whether the extension has been granted.
If you seek an Extension of Submittable Work for more than 7 calendar days (from the original due date) must lodge an Application for Special Consideration form under the provisions of the Special Consideration Policy, preferably prior to, but no later than 2 working days after the official due date.
Submittable Work (assignments, reports or project work etc.) submitted late without approval of an extension will not be accepted or marked.

Special consideration:
Please Refer http://www.rmit.edu.au/browse;ID=riderwtscifm to find more information about special consideration
Plagiarism:
Plagiarism is a form of cheating and it is very serious academic offence that may lead to expulsion from the University.
Please Refer: www.rmit.edu.au/academicintegrity to find more information about plagiarism.

Other Information:
All email communications will be sent to your RMIT email address and you must regularly check your RMIT emails.
 

Course Overview: Access Course Overview