Routine Tests

• Visual and dimensional inspection
• Winding resistance measurement
• Transformer Turns Ratio (TTR) test
• Vector group and polarity verification
• No-load loss and excitation current test
• Load loss and impedance voltage test
• Applied AC withstand voltage test
• Induced overvoltage withstand test
• Insulation resistance measurement
• Oil dielectric strength test
• Leak and pressure integrity test
• Final mechanical and electrical inspection

Optional / Type Tests

• Temperature rise test
• Lightning impulse withstand test (BIL)
• Short-circuit withstand verification
• Sound level measurement
• Partial discharge measurement
• Customer witness FAT