3-Phase Isolation Transformer – 20 kVA (Aluminum Windings, K-Factor 4, Vector Group DYn11)

is engineered for demanding industrial and critical-power applications. Its Class H insulation and aluminum conductor windings deliver reliable performance and > 96 % efficiency even under harsh conditions up to 50 °C ambient. The K-Factor 4 design attenuates non-linear load harmonics, protecting downstream equipment. With a DYn11 vector group, it provides a 30° phase shift and a solid-star secondary grounding option ideal for medical devices, CNC machinery, and precision instrumentation. Certified to IEC 61558-1, IEC 61558-2-4, IEC 60076-1, and IEC 60601-1, the transformer can be specified as an open-frame unit (IP00) or fitted in a ventilated enclosure (IP23) for additional protection.
🔧 Specifications:
• Rated Input Voltage: 3×400 VAC ± 10%
• Rated Output Voltage: 3×400 VAC ± 10%
• Rated Power: 20 kVA
• Rated Current: 3×28.9 A
• Insulation Class: H
• Maximum Ambient Temperature: 50 °C
• Efficiency: > 96 %
• Protection Degree: IP00 (without enclosure) / IP23 (with enclosure)
• Frequency: 50 / 60 Hz
• K-Factor: 4
• Windings: Aluminum
• Vector Group: DYn11
• Dimensions (IP00): 420 × 244 × 430 mm
• Weight (IP00): 98 kg
• Dimensions (IP23): 660 × 420 × 670 mm
• Weight (IP23): 131 kg
• Standards: IEC 61558-1, IEC 61558-2-4, IEC 60076-1, IEC 60601-1
💡 Applications:
• Sensitive electronics isolation (CNC, PLCs)
• Medical-grade power supplies
• Laboratory instrumentation
• Critical UPS and data-center systems