Block Open Frame 15 kVA Auto-Transformer, 220 V 230 V ac Primary, 400 V ac Secondary AT3 15-22/23-4

Block AT3 15-22/23-4 is a high efficiency, low heat loss three-phase auto-transformer with a power rating of 15 kVA, designed for industrial and commercial applications requiring voltage modulation. It features a robust open frame construction and supports primary voltages of 220 V and 230 V ac with a secondary output voltage of 400 V ac. The transformer is engineered for flexible mounting options including floor standing, wall, or chassis installation, with screw type terminations facilitating reliable and easy electrical connections.

Operating effectively in a frequency range from 50Hz to 60Hz, this auto-transformer maintains optimum performance up to a maximum operating temperature of 40°C. Its compact physical dimensions - 410 mm in length, 195 mm in width, and 345 mm in depth - allow for efficient integration into various electrical setups. Weighing 64.9 kg, the unit ensures sturdy and durable operation suitable for demanding environments.

Manufactured in Germany, the product adheres to several rigorous international safety and quality standards including VDE 0532, UL 506, CSA 22.2, IEC 61558-2-13, DIN EN 61558-2-13, and C-UL-US, providing users confidence in consistent electrical safety and performance. Typical industrial uses include power conditioning for manufacturing equipment, HVAC systems, automation machinery, and various commercial installations where voltage regulation is critical.

Efficient three-phase auto-transformer delivering 15 kVA power. Modulates input voltages of 220 V and 230 V ac with 400 V ac secondary voltage output. Open frame design for enhanced cooling and flexible mounting options.

Screw termination connections enhance installation reliability. Operates within 50Hz to 60Hz frequency range and maximum temperature of 40°C. Complies with multiple international standards ensuring safety and quality. Compact form factor with dimensions 410 x 195 x 345 mm and weight 64.9 kg.

This transformer series is engineered with vacuum impregnation for insulation reliability and designed for reverse operation capability. It supports multiple industrial environments including manufacturing, laboratory electrical setups, commercial power distribution, and specialized applications requiring dependable voltage transformation. The product is part of the Block AT3 series known for its durability and performance efficiency.

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