Who should attend?
This workshop is developed for technical personnel who work in the transformer testing facilities, commissioning engineers, maintenance personnel and inspectors of power and distribution transformers.
Project managers, operational managers and other personnel responsible for purchasing, commissioning and inspecting the power and distribution transformers in industrial and commercial distribution systems, will find this workshop extremely beneficial.

Course Synopsis:
From manufacturing to decommissioning, transformers undergo a variety of tests which are appropriate for various stages of transformer life cycle. These tests enable us to verify that the transformer is built according to the specification and properly installed, enable us to evaluate the condition of the transformer and estimate its remaining life is service. The results of these tests can warn us of impending failure and confirm the effectiveness of corrective or maintenance procedures.

This workshop discusses various types of testing and their applications. It covers testing procedures, applicable standards, testing conditions and safety considerations. It provides guidance on what are the key parameters that should be checked before the testing and what kind of results should be expected.

Course Content Day 1
Testing and commissioning philosophy
Categories of various transformer tests and their application
Factory Testing
• Routine tests
• Type tests
• Special tests
Commissioning and Acceptance tests
Field tests
• Oil screen testing
• Moisture in oil test
• Gas-in-oil analysis (DGA)
• Electrical testing
Specialised diagnostic tests
• Infrared scanning
• Frequency response (SFRA)
• Acoustic analysis
• Vibration analysis

Day 2
Electrical Testing Procedures for measuring
• Winding insulation resistance
• Voltage ratio and tap changer test
• Magnetising currents
• Winding resistance
• Polarity check of CTs built into transformers
• Measurement of no-load current and no-load losses
• Impedance voltage, short -circuit impedance and load loss
• Separate-source voltage withstand test
• Induced overvoltage withstand test
• Temperature-rise test
• Measurement of zero-sequence impedance on three-phase transformers
• Lightning and switching impulse withstand test
• Noise level test
General requirements for transformer tests
• Normal service conditions
• Adjusted temperature rise
• Minimum air clearance and flash over distance
Applicable standards and specifications
Safety considerations
Open discussion workshop

Course Trainer:
Aleksandar Milin
MSc (Hon) Electrical Engineer
Member of IET (UK) and IEEE(US)
Power Engineering Consultant
Managing Director – MATREX

TRANSFORMER OPERATION & MAINTENANCE SAIEE-0166-V
HV & MV SWITCHGEAR APPLICATION & MAINTENANCE SAIEE-0179-V
EARTHING & LIGHTNING PROTECTION FOR HV INSTALLATIONS SAIEE-0181-V
TRANSFORMER DESIGN, INSTALLATION & PROCUREMENT
TRANSFORMER TESTING