Practical Variable Speed Drives (VSDs)
For Instrumentation and Control Systems
SAQA ID : 13334
NQF Level : Level 4
Credits : 10
VSD COURSE IS SAIEE ACCREDITED AS PER ECSA POLICY WITH 2CPD CREDIT
OBJECTIVES:
At the end of this workshop participants will be able to:
- Demonstrate a sound understanding of how AC Variable Speed Drives (VSDs) work
- Install VSDs properly
- Select the right VSD for a given application
- Troubleshoot VSDs competently
- Competently explain how flux-vector control works for drive applications
- Understand squirrel cage induction motors
- Identify the protection and control system requirements for VSDs
- Interface VSDs with PLCs
- Understand the causes of motor burnout
- Deal effectively with VSD harmonics and EMC/EMI problems
THE WORKSHOP:
It is estimated that electrical drives and other rotating equipment consume about 50% of the total
electrical energy generated in the world today. Other estimates are that pumps, fans, blowers and
compressors consume as much as 65% of this total, a large proportion of these applications are
powered by fixed or constant speed drivers whose load demands often fluctuate. This poor match of
speed and demand results in considerable wasted energy and significantly increased wear of system
components
Variable speed drive technology is a cost effective method to match driver speed to load demands and
is an excellent opportunity to reduce operating costs and improve overall efficiencies in your
application.
This workshop gives you a fundamental understanding of the installation, operation and
troubleshooting of variable speed drives. Typical practical applications of VSDs in process control and
materials handling, such as those for pumping, ventilation, conveyers, compressors and hoists are
covered in detail. You will learn the basic setup of parameters, control wiring and safety precautions in
installing a VSD. The various drive features such as operating modes, braking types, automatic restart
and many others will be discussed in detail. You will learn the four basic requirements for a VSD to
function properly with emphasis on typical controller faults, their causes and how they can be repaired.
ASSESSMENT & CERTIFICATION
The learners will be subjected to practical assessments and on successful completion of the course, the learners will be awarded certificates of competence.