Step-Lap Amorphous Core
Laser-cut amorphous alloy laminations stacked in a 45° step-lap pattern reduce no-load losses by up to 70% and cut magnetostriction noise below 45 dB.
Engineering
Why utilities specify VOLTEDGE
A transformer is a 30-year asset. These six technologies are why ours run cooler, lose less energy and outlast the warranty.
99.99% Oxygen-Free Copper
Continuously transposed conductors from C10100 copper keep load losses low and hot-spot temperature rise under 55K — certified by SGS material assay.
ONAF Corrugated Cooling
Fully corrugated tank walls plus optional forced-air stages deliver 30% more radiating surface than flat-tube designs, extending insulation life.
Vacuum Oil Processing
Double-stage vacuum drying and degassing to IEC 60296 pushes breakdown voltage above 70kV/2.5mm and moisture below 10ppm before filling.
Smart DGA Monitoring
Optional online dissolved-gas analysis with 4G/Modbus telemetry flags incipient faults months before failure — predictive maintenance as standard.
C5-M Marine Coating
Shot-blasted Sa 2.5 surface, epoxy-zinc primer and polyurethane topcoat qualified to ISO 12944 C5-M — built for coastal and desert duty.
Quality Assurance
Routine-tested before it leaves the bay
Every single unit passes the full IEC 60076-1 routine test sequence in our 220kV screened test hall — certificates shipped with the transformer.
Ratio & vector group test
Turns ratio verified on every tap position
Winding resistance
DC resistance on all phases and taps
Insulation resistance
Megger & polarization index measurement
Applied voltage (AV)
Short-duration power-frequency withstand
Induced voltage (IVPD)
With partial-discharge measurement < 10pC
No-load & load loss
Guaranteed values verified and certified
Lightning impulse
Type-tested waves on HV and LV terminals
Oil DGA & BDV
Chromatography and breakdown strength
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