20 kVA Variac Transformer, Three Phase

Q1: How does the heat sink hole design benefit this 20 kVA three-phase variac transformer?

The enhanced heat sink hole design increases internal airflow and improves heat dissipation during operation, preventing excessive temperature buildup inside the unit. This directly extends the service life of the variac transformer and helps maintain stable, consistent output performance over prolonged use in demanding power supply environments.

Q2: What output voltage options does this 20 kVA three-phase variable transformer offer?

This variac voltage regulator provides two selectable output voltage ranges — 0–430V or 0–500V — both from a 380V-rated input with a 27A rated current. This dual-range flexibility makes it suitable for a wide variety of laboratory, industrial, and household electricity applications.

Q3: What makes the copper coil in this variac voltage regulator stand out?

The built-in high-quality copper transformer coil offers superior electrical conductivity and lower resistance compared to standard alternatives, resulting in more efficient power transmission, reduced heat generation, and a sturdier, more durable internal structure — ensuring this 20 kVA three-phase variac transformer delivers reliable performance over its full service life.