Description:

A 630 kVA transformer with a primary voltage of 20 kV and a secondary voltage of 0.4 kV is commonly used in electrical distribution networks to step down medium voltage to low voltage for industrial and commercial applications. These transformers are typically three-phase and can be designed as oil-immersed or dry-type units.

Key Specifications:

• Rated Power: 630 kVA
• Primary Voltage: 20 kV
• Secondary Voltage: 0.4 kV
• Frequency: 50 Hz or 60 Hz
• Cooling Method: Oil-immersed (ONAN) or Dry-type (AN)
• Winding Material: Copper or Aluminum
• Vector Group: Dyn11
• Impedance Voltage: Approximately 6%
• Tap Changer Range: ±2 x 2.5%