Transcript PAMSA Learnerships

National Certificate in Paper & Pulp Manufacturing NQF Level 2
Understand the
operating
principles of
transformers
Commissioned by PAMSA
and German Technical Co-Operation
1
National Certificate in Paper & Pulp Manufacturing NQF Level 2
Understand the operating principles of
transformers
Modules
Topics
Notional Hours
TE221
Electromagnetic induction
TE221
Transformer calculations
TE221
Eddy currents
4
18
8
P&P2EL
Electromagnetic
induction
P&P2EL
Transformers
Total Notional Hours 30
Commissioned by PAMSA
and German Technical Co-Operation
2
National Certificate in Paper & Pulp Manufacturing NQF Level 2
US: 10719
Understand the operating principles of transformers
Critical Cross-field Outcomes
TE221
Electromagnetic induction
Identify and solve
problems
Work effectively with
others
Understand the impact of various
factors on the current generated
when a conductor is moved through
a magnetic field
Understand the result of a
conductor being moved through
a magnetic field
Understand the definitions, symbols, units of
measurement and basic terminology used in
electricity and magnetism
Communicate effectively
Organise and manage
myself and my activities
Collect, analyse, organise
and critically evaluate
information
Use science and
technology effectively and
critically
Demonstrate an
understanding of the
world as a set of related
systems
Use mathematics
Learner and societal
development
Commissioned by PAMSA
and German Technical Co-Operation
3
National Certificate in Paper & Pulp Manufacturing NQF Level 2
Topic Specification: TE221
Execute, test and
evaluate
Analyse, plan and
make decisions
Collect Information
Learning Activities
Use Multi media
Self Study
Field visits
Media search
Electromagnetic induction
Assignment Description
W
H
A
T
Interview experts
A group or individual exercise of
viewing video material on transformer
principles.
Group experimental set-up to
demonstrate that a current is generated
when a conductor is moved through a
magnetic field.
Attend lectures
HOW
Group Discussions
Sketch
Case studies
Use checklists
Develop
recommendations
Job assignment
Make sketch
Complete documents
Draft a report
Topic assessment criteria
The assessor will observe and confirm
that learners:
• Understand the principles of a
magnetically induced current
• Understand how various factors impact
on the current generated when a
conductor is moved through a magnetic
field
1. A simple experiment is set up where a
circuit is attached to an multimeter and a
magnet is used to induce a current
2. Indicate the effect of reversing the
magnetic poles, varying the speed at which
the conductor is moved through the field
and adding some loops to create a loose
coil with the conductor.
3. Learners write a short report in which the
experiment is sketched (with captions) and
tabled for assessment.
Complete a
test/questionnaire
Commissioned by PAMSA
Notional
Hours
4
and German Technical Co-Operation
4
National Certificate in Paper & Pulp Manufacturing NQF Level 2
US: 10719
Understand the operating principles of transformers
Critical Cross-field Outcomes
TE221
Transformer calculations
Identify and solve
problems
Work effectively with
others
Be able to calculate primary and
secondary transformer circuit
parameters
Communicate effectively
Understand the basic symbols and
formulas used in transformer
calculations
Collect, analyse, organise
and critically evaluate
information
Understand the operating
principles of a simple
transformer
Understand the impact of
alternating current on an
electromagnet
Organise and manage
myself and my activities
Use science and
technology effectively and
critically
Demonstrate an
understanding of the
world as a set of related
systems
Use mathematics
Learner and societal
development
Commissioned by PAMSA
and German Technical Co-Operation
5
National Certificate in Paper & Pulp Manufacturing NQF Level 2
Topic Specification: TE221
Execute, test and
evaluate
Analyse, plan and
make decisions
Collect Information
Learning Activities
Use Multi media
Self Study
Field visits
Media search
Transformer calculations
Assignment Description
W
H
A
T
Interview experts
Learners attend a short lecture in
which transformer calculation methods
are explained
Learners prepare a transformer poster
which is used to explain transformer
operating principles to the group
Learners use self study material related
to transformer principles
Attend lectures
Group Discussions
HOW
Sketch
Case studies
Use checklists
Develop
recommendations
Job assignment
Make presentation
Complete documents
Draft a report
Complete a test
Topic assessment criteria
The assessor will observe and confirm
that learners:
• Understand the impact of alternating
current on an electromagnet
• Understand the operating principles of a
simple transformer
• Understand the basic symbols and
formulas used in transformer calculations
• Are able to do basic transformer
calculations
1. Learners prepare a poster to assist them to
explain the operation of a transformer
2. Each learner get the opportunity to present
to the group:
• the impact an alternating current will have
on the transformer core
• the basic operating principle of
transformers
• the transformer relationship formulas
2. Learners solve a number of given
transformer problems
3. Learners complete a test in which
understanding of transformer calculations
and principles are demonstrated
Commissioned by PAMSA
and German Technical Co-Operation
Notional
Hours
18
6
National Certificate in Paper & Pulp Manufacturing NQF Level 2
US: 10719
Understand the operating principles of transformers
Critical Cross-field Outcomes
TE221
Eddy Currents
Identify and solve
problems
Work effectively with
others
Understand how eddy currents influence
the efficient operation of a transformer and
how it can be counteracted
Communicate effectively
Organise and manage
myself and my activities
Collect, analyse, organise
and critically evaluate
information
Understand the impact of eddy currents on
the moving conductor and how this can be
countered by cutting slots in the
conductor
Use science and
technology effectively and
critically
Understand the occurrence of eddy currents in a
flat conductor moved through an electric field
Demonstrate an
understanding of the
world as a set of related
systems
Use mathematics
Learner and societal
development
Commissioned by PAMSA
and German Technical Co-Operation
7
National Certificate in Paper & Pulp Manufacturing NQF Level 2
Topic Specification: TE221
Execute, test and
evaluate
Analyse, plan and
make decisions
Collect Information
Learning Activities
Use Multi media
Self Study
Field visits
Media search
Transformer principles
Assignment Description
W
H
A
T
Learners have a group discussion to try
and explain the phenomena of eddy
currents in transformer cores
Learners are supplied with a small
transformer (e.g. charger) to view
An exercise to view video material on
eddy currents in transformers.
Interview experts
Attend lectures
HOW
Group Discussions
Educational games
Case studies
Use checklists
Develop
recommendations
Job assignment
Make presentation
Complete documents
Draft a report
Complete a
test/questionnaire
1. The fact that eddy currents are generated in a
flat conductor moved through a magnetic
field is explained to learners.
2. In a group discussion learners should try to
explain why the eddy currents are generated
and how cutting slits in the conductor will
minimise the effect
3. A simple transformer is passed around to
show its construction – especially the
insulated core leaves
4. Continue the discussion by having the group
discuss and summarise why the core is
produced from insulated leaves
5. Learners view video material to confirm the
principles discussed
6. A multiple choice questionnaire is used to
confirm understanding
Commissioned by PAMSA
Topic assessment criteria
The assessor will observe and confirm
that learners:
• Understand the occurrence of eddy
currents in a flat conductor moved through
an electric field
• Understand the impact of eddy currents
on a flat moving conductor and how this
can be countered by cutting slots in the
conductor
• Understand how eddy currents influence
the efficient operation of a transformer and
how it can be counteracted
and German Technical Co-Operation
Notional
Hours
8
8