TRANSFORMER MAINTENANCE
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Check course availability
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Benefits include:
Comprehensive course documentation
Certificate of attendance
Participation in an interactive workshop
Learning from an internationally & locally recognised expert
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Learning outcomes:
Learn about basic principles, critical parameters and main
components of a transformer; obtain overview on testing and normal
operation of transformers
Understand underlying causes of transformer failures, how to
investigate and prevent failures through testing and preventive
maintenance
Explore technical, organisational and operational aspects and
safety considerations in establishing an effective transformer
maintenance program;
Discuss in detail a number of field tests and a typical maintenance
schedule
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Day 1
Modern solutions in transformer manufacturing
Main components, Auxiliary equipment and Protective devices
Insulation and cooling
Four functions of mineral oil and insulation system
Modern insulation materials
Cooling equipment - natural and forced air cooling methods, typical oil flow
Understanding transformer nameplates
Long life through proper transformer operation
Normal service conditions
Permitted and dangerous levels of transformer overload
Transformer's life expectancy and life limiting factors
Aging accelerators - why transformers age and what can we do to prevent it
Day 2
Types of maintenance
Ordinary versus unscheduled maintenance
Benefits of Protective Maintenance
Aspects of an effective maintenance program
Organisational, Operational and Technical aspects
Special considerations (Oil and Bushing maintenance, Minimum maintenance devices)
Safety considerations
Monitoring and diagnostic tests
Routine, Type and Special tests
Field tests (Oil screen testing, Moisture in oil test, Gas-in-oil analysis, Electrical testing)
Key aspects of an effective oil testing program
Diagnostic aspects of Gas-in-oil analysis
Day 3
WORKSHOP
Discuss a typical maintenance schedule, underlying causes of transformer failures, how to investigate and prevent failures through testing and preventive maintenance.
Case Studies
Indicators for interior condition of the transformer
Interpreting Oil Test results to prevent unscheduled outages
Interpreting Gas-in-oil analysis results
Limitations of monitoring and diagnostic tests
How to reliably recommend a degree of servicing required
Transformer Maintenance Schedule
Energised and de-energised maintenance activities broken down per maintenance intervals
Electrical Testing Procedures
For measuring
Winding insulation resistance
Voltage ratio and tap changer test
No-load currents
Winding resistance
Polarity check of CTs built into transformers
Core earthing test
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Who should attend?
This course is suggested for all technical personnel involved
with operations and/or maintenance of power and distribution
transformers; in particular for all engineers, supervisors and
managers who work in transmission, distribution, maintenance
and operation of utilities, industrial and commercial distribution
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Course Synopsis:
Inadequate or negligent maintenance would not only affect
transformer's life in service, but could have serious commercial
and contractual as well as environmental and safety implications.
Once a transformer is in service its performance and lifetime is
dependent on care, like any other product. For all practical
purposes transformer life expectancy beyond 20 years significantly
depends on the quality of maintenance applied to it.
This course is focusing on critical issues that should be considered
in establishing and implementing effective transformer maintenance
program. It provides understanding of transformer's principles, its
main components as well as an overview on testing and operation of
power and distribution transformers.
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Course Trainer:
Aleksandar Milin
BSc (Hon) Electrical Engineer
Member of IET (UK) and IEEE(US)
Power Engineering Consultant
Managing Director - MATREX
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