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Evidence Guide: UEEEC0075 - Troubleshoot single phase input d.c power supplies

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

UEEEC0075 - Troubleshoot single phase input d.c power supplies

What evidence can you provide to prove your understanding of each of the following citeria?

Troubleshoot d.c. power supplies

  1. Work health and safety (WHS)/occupational health and safety (OHS) procedures for a given work area are obtained and applied
Work health and safety (WHS)/occupational health and safety (OHS) procedures for a given work area are obtained and applied

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Nature of d.c. power supplies fault is obtained from documentation or from work supervisor to determine the scope of work to be undertaken

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Completed
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Materials required for the work are determined in accordance with workplace procedures

Completed
Date:

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Tools, equipment and testing devices required to carry out the work are obtained in accordance with workplace procedures and checked for correct operation and safety

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Solve d.c. power supply problems

  1. WHS/OHS risk control work measures and workplace procedures are followed
WHS/OHS risk control work measures and workplace procedures are followed

Completed
Date:

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Power supply fault finding is approached methodically in accordance with workplace procedures, drawing on knowledge of d.c. power supplies and using measured and calculated values of parameters

Completed
Date:

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Fault-finding activities are carried out efficiently without unnecessary waste of materials or damage to apparatus, the surrounding environment or services using sustainable energy practices

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Complete work and document problem-solving activities

  1. WHS/OHS risk control measures and workplace procedures for work completion are followed
WHS/OHS risk control measures and workplace procedures for work completion are followed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Worksite is cleaned and made safe in accordance with workplace procedures

Completed
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Justification for solutions used to resolve single phase input d.c. power supply problems are documented in accordance with workplace procedures

Completed
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Work completion is documented and appropriate person/s notified in accordance with workplace procedures

Completed
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Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Required Skills and Knowledge

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least two separate occasions and include:

applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements, including:

using risk control measures

checking tools, materials, equipment and testing devices for correct operation and safety

testing or measuring on live and operating system safely

ensuring circuits are isolated

communicating effectively with relevant stakeholders

completing work and required documentation

maintaining a clean worksite and equipment

referring to relevant documentation to determine the fault

solving direct current (d.c.) power supply problems

troubleshooting d.c. power supplies with single phase input, including:

using methodical problem-solving methods

providing written justification for the solutions to d.c. power supplies problems

dealing with unplanned events in accordance with workplace procedures

taking measurements correctly and accurately

calculating parameters correctly and accurately

providing solution to power supply problems.

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

power supplies operating principles and applications, including:

block diagram identifying each sub-system

constant voltage and current

expected waveforms in a power supply

power supply function

d.c. rectification circuits, including:

dual rail supply

half wave and full wave rectifiers

junction diode characteristics

transformer turns ratio and losses

filter circuits, including:

capacitive and inductive filters

ripple

zener diode regulator, including:

load and line regulation definitions

operating parameters and data sheets

zener shunt regulator circuit

three terminal regulator circuits, including:

line and load regulation

need for regulation

regulated power efficiency

remote voltage sensing

short circuit protection

three terminal regulator characteristics and faults

electronic testing and measuring devices and techniques, including:

test/measuring devices and their application, including:

multimeters

signal generators and oscilloscopes

voltage and digital testers

connection of test/measuring devices into a circuit, including:

circuit arrangement of test/measuring devices

safety procedures

taking readings

storage, maintenance and care of test/measuring devices

d.c. power supply testing and fault-finding including:

rectifier diode faults

zener diode faults

three terminal regulator faults

capacitor faults

safe working practices and relevant standards, codes and regulations.

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment.

Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide.

Troubleshooting d.c. power supply problems must include:

single phase input on the rectification section

filtering section of a half wave and full wave rectifiers