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

Part B: Course Detail

Teaching Period: Term2 2014

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:

Name and Contact Details of All Other Relevant Staff

Rand Gorgis
Ph: 99254378
Fax: (03) 99254377

Kemps Cheng
Ph: 99254691
Fax: (03) 99254377


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


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


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

Performance Criteria:

OHS procedures for a given work area are identified, obtained and understood.

Established OHS risk control measures and procedures in preparation for the work are followed.

Safety hazards, which have not previously been identified, are noted and established risk control measures are implemented.

The nature of the circuit(s) problem is obtained from documentation or from work supervisor to establish the scope of work to be undertaken.

Advice is sought from the work supervisor to ensure the work is coordinated effectively with others.

Sources of materials that may be required for the work are established in accordance with established procedures.

Tools, equipment and testing devices needed to carry out the work are obtained and checked for correct operation and safety.



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

Performance Criteria:

OHS risk control measures and procedures for carrying out the work are followed.

The need to test or measure live is determined in strict accordance with OHS requirements and when necessary conducted within established safety procedures.

Circuits/machines/plant are checked as being isolated where necessary in strict accordance OHS requirements and procedures.

Established methods are used to solve circuit problems from measure and calculated values as they apply to single and three-phase low voltage circuit.

Unexpected situations are dealt with safely and with the approval of an authorised person.

Problems are solved without damage to apparatus, circuits, the surrounding environment or services and using sustainable energy practices.



3. Complete work and document problem solving activities.

Performance Criteria:

OHS work completion risk control measures and procedures are followed.

Work site is cleaned and made safe in accordance with established procedures.

Justification for solutions used to solve circuit problems is documented.

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

 Learning Activities
You will involve in the following learning activities to meet requirements for this competency and stage 1 competencies for Engineering Associates.
• lectures
• Tutorials
• Practicals

Engineers Australia Mapping Information:
This course is mapped against stage 1 competencies for Engineering Associates developed by Engineers Australia as detailed below:

EA1.1. Comprehensive, theory based understanding of the underpinning natural and physical sciences and the engineering fundamentals applicable to the engineering
EA1.2. Conceptual understanding of the, mathematics, numerical analysis, statistics, and computer and information sciences which underpin the engineering discipline.
EA1.3. In-depth understanding of specialist bodies of knowledge within the engineering discipline.
EA1.4. Discernment of knowledge development and research directions within the engineering discipline.
EA1.5. Knowledge of contextual factors impacting the engineering discipline.
EA1.6. Understanding of the scope, principles, norms, accountabilities and bounds of contemporary engineering practice in the specific discipline.
EA2.1. Application of established engineering methods to complex engineering problem solving.
EA2.2. Fluent application of engineering techniques, tools and resources.
EA2.3. Application of systematic engineering synthesis and design processes.
EA2.4. Application of systematic approaches to the conduct and management of engineering projects.
EA3.1. Ethical conduct and professional accountability.
EA3.2. Effective oral and written communication in professional and lay domains.
EA3.3. Creative, innovative and pro-active demeanour.
EA3.4. Professional use and management of information.
EA3.5. Orderly management of self and professional conduct.
EA3.6. Effective team membership and team leadership

Engineers Australia Stage 1 Competencies are mapped with competency UEENEEG102A in the Assessment Matrix.


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

The proposed teaching schedule for this competency is detailed below:

Week  Topic Delivered
Elements/Performance Criteria 
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
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
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
Project Based Assignment
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 %)


            Energy and power requirements of a.c. systems

Tutorial 5

16            Fault Loop Impedance of a.c. power system

measurements and testing

 Project (10%)

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



RMIT online learning resources are located on RMIT Online Learning Hub. Follow the link to log in
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
3.2X X 




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

Assessment vs UEENEEG102A Elements & Performance Criteria 

 UEENEEG102A Elements & Performance Criteria



Exam / TestX  X   X  XXX  XX


Assessment vs Engineers Australia Stage 1 Competencies

 Assessment vs Engineers Australia Stage 1 Competencies
Laboratory exerciseXX         X   X
Exam / TestXXX   X X       
ALL ASSESSMENTS (UEENEEE126A)3320012111021111
0 (Blank)Graduate attribute is not assessed.
1Graduate attribute is assessed in at least one, but less than one-third, of the Element.
2Graduate attribute is assessed in at least one third, but less than two-thirds, of the Element.
3Graduate attribute is assessed in more than two-thirds of the Element.

Other Information

  • Student directed hours involve completing activities such as reading online resources, assignments, individual student-teacher course-related consultation. Students are required to self-study the learning materials and complete the assigned out of class activities for the scheduled non-teaching hours. The estimated time is 32 hours outside the class time.


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 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 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;ID=riderwtscifm to find more information about special consideration


Plagiarism is a form of cheating and it is very serious academic offence that may lead to expulsion from the University.
Please Refer: 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