Comprehensive Power Transformer Preventive Maintenance

Training objective:

The objective of this seminar is to inform the participants of the importance of preventive maintenance of power transformers, its major components, and to guide them on the testing and evaluation of results of the power transformer.

Course description:

The 2-day course (16hours) will focus on the Preventive Maintenance of Electrical Transformers. A basic understanding of a transformer and its construction will be discussed, and the theories of the electrical test to be performed. Proper procedures on testing will also be discussed on the first day. All procedures will be based on the InterNational Electrical Testing Association (NETA). On the second day, safety and testing procedures will be implemented before hands on training. Testing of power transformer will be performed.

Who should attend:  

This course will enhance the understanding and increase competencies for:

• Engineers & technicians in the utility, transmission, and generation sectors that operate and maintain their power transformer.
• Engineers and electricians in commercial and industrial field that maintains power transformers.
• Electrical engineering graduates who would like to be test and applications engineers and Technicians for substation.

At the end of the program, the participants will be able to:

• Explain different types of transformer
• Know the major parts of a transformer
• Discuss the nameplate data
• Know the safety procedures in preventive maintenance of transformer
• Discuss the electrical testing performed on transformers
• Evaluate electrical test results gathered
• Knowledge in present technologies in preventive maintenance of transformer

Course outline:

1^st Day

1. Introduction
2. What is a transformer
   • History
   • Principle
   • Types and Design
   • Construction
   • Cooling Classification

• Components and Indicators
  • Major Components
  • Indicators, Alarms

1. Nameplate
   • Nameplate data
2. Importance of Preventive Maintenance of Power Transformer
3. Theory and Procedures for Transformer Electrical Test
   • Visual Inspection
   • Insulation Power Factor Test
   • Insulation Resistance Test
   • Transformer Turns Ratio Test
   • Winding Resistance Test

• Special topics
  • Excitation Test
  • Impedance Test
  • SFRA Test
  • DGA and Oil Quality Test

2^nd Day

(Whole day)

1. Safety procedures in Testing
2. Hands on Power Transformer Testing (As per ASTM NETA Guidelines)
   • Insulation Power Factor Test
   • Transformer Turns Ratio Test
   • Winding Resistance Test
   • Insulation Resistance Test with P.I.

• Evaluation of Results

New technologies in testing