Three-Phase Transformer Course
Gain mastery in three-phase transformers rated from 33 kV to 132 kV. Acquire knowledge in design principles, vector groups, sizing calculations, protection schemes, one-line diagrams, and field testing to confidently specify, commission, and operate substation transformers safely and efficiently.

4 to 360 hours flexible workload
valid certificate in your country
What will I learn?
This course equips participants with practical expertise to select, size, connect, protect, and commission three-phase transformers operating between 33 kV and 132 kV. Key topics include power system basics, vector groups, tap changers, fault analysis, one-line diagram preparation, relay coordination, and on-site testing, enabling reliable, safe, and efficient transformer system design, specification, and operation.
Elevify advantages
Develop skills
- Size three-phase transformers using MVA, kV, and current formulae in practical settings.
- Interpret substation one-line diagrams, including symbols, power flow, and switching paths.
- Select and configure vector groups, such as delta or wye connections for grounding, faults, and harmonics.
- Set up transformer protection, including CT/PT ratios, relay settings, and fault limits.
- Conduct field tests like phasing, polarity, oil, and insulation checks prior to energisation.
Suggested summary
Before starting, you can change the chapters and the workload. Choose which chapter to start with. Add or remove chapters. Increase or decrease the course workload.What our students say
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