6- 220kV Power,Furnace,Rectifier Transformer Manufacture

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