1. Power Transformer 2. Furnace Transformer 3. Rectifier Transformer 4. Distribution Transformer
PRODUCT SCOPE
Voltage: Oil type from 6kV-220kV, Dry type from 6kV-35kV
Capacity: 100kVA-240MVA
APPLICATION
Power Transformer
Furnace Transformer
Rectifier Transformer
Distribution Transformer
REFERENCES
ISO 1461: Hot dip galvanized coatings on fabricated iron and steel articles – Specifications and test methods.
IEC 60076: Power transformers.
IEC 60044: Instrument transformers.
IEC 60296: Specification for unused mineral insulating oil for transformers and switchgear.
IEC 60354: Loading guide for oil – immersed power transformers.
IEC 60214: Tap-changers - Part 1: Performance requirements and test methods, Part 2: Application guide.
IEC 60512: Connectors for electronic equipment.
ROUTINE TEST to IEC 60076 (to be done during acceptance testing at factory)
• Measurement of winding resistance
• Ratio test
• Vector group
• Separate source voltage withstand test
• Induced over-voltage
• Insulation resistance
• Oil leakage test on fully assembled transformer for 12 hours
• Measurement of impedance voltage
• Magnetic balance
• Measurement of no-load loss and current
• Measurement of load loss (at normal & extreme taps)
• Tests on on-load tap-changer
• Tests on on-load tap-changer remote control panel
• Efficiency at 50%, 75%, 100% loading at unity p.f and rated terminal voltage (Corrected to 75C)
• Lightning impulse withstand test
Type Tests to IEC 60076 (to be done during acceptance testing at factory)
• Temperature rise test – To be performed on one unit during acceptance testing.
Lightning Impulse Withstand Test is already listed under Routine Tests as per IEC 60076.
6- 220kV Power,Furnace,Rectifier Transformer Manufacture
