Power Transformer Trainings from Basics to FAT

Mastering Transformers: From Design to Commissioning

This comprehensive course equips engineers with the essential knowledge to handle transformers throughout their lifecycle – from initial design specifications to successful commissioning. You'll gain practical insights into transformer operation, maintenance, and troubleshooting.

Here's a detailed breakdown of the topics covered:

• Transformer Fundamentals: Delve into the core principles of transformer operation. Learn about transformer basics & definitions, key components, vector groups, and crucial parameters like transformer's short circuit voltage (Z%). Understand the process of calculating the through fault short circuit current, a vital aspect of electrical system protection.

• Transformer Types & Construction: Explore various transformer types, including dry-type and oil-type designs (covering hermetically sealed and conservator type variations). Gain expertise in cooling methods and insulation techniques, along with surface treatment methods and proper transformer mounting.

• Control, Protection & Accessories: Become proficient in understanding tap changers (both on-load and offload types) and their operation. Learn about essential monitoring and protection devices, including the Buchholz relay, winding temperature indicator, oil temperature indicator, oil level indicator, pressure relief device, integrated safety detector, and dissolved gas analyzer. Explore temperature control units, silica gel usage, and a complete overview of essential accessories such as cable boxes, post insulators, LV & HV bushings, lifting lugs, jacking pads, arcing horns, and neutral earthing resistors. The course concludes with a practical example of a transformer monitoring system.

• Specialized Transformer Applications: Discover the intricacies of special application transformers, including neutral grounding transformers, pulse converter transformers, K-factor rated transformers, wind turbine transformers, and autotransformers.

• Transformer Sizing: Master transformer sizing criteria, with a focus on distribution transformer sizing and motor starting transformers.

• Transformer Documentation & Drawings: Develop expertise in interpreting crucial transformer drawings, including datasheets, general arrangement diagrams, marshalling box general arrangement and wiring, nameplates, and the wiring diagrams of AVR (Automatic Voltage Regulator), OLTC (On-Load Tap Changer), and RTCC (Remote Temperature Control Unit).

• Testing & Acceptance Procedures: Understand and apply the Inspection Test Plan (ITP) and Factory Acceptance Tests (FAT). These include:

  • Winding resistance measurement
  • Voltage ratio & vector group measurement
  • Short circuit impedance & load losses measurement
  • No-load losses and current measurement
  • Leak testing (for liquid-immersed transformers) using pressure
  • Dielectric tests: Separate source AC withstand voltage test (Applied voltage test) and Short duration induced AC withstand voltage
  • Type Tests: Temperature-rise type test, Dielectric type tests, and sound level determination for specified cooling methods.
  • Site Acceptance Tests (SAT) – covering aspects of FAT, excluding the additional tan delta test.