- Three-phase transformers are classified as isolation transformers according to the standard (IEC 96.1) IEC 61558-1 IEC61558-2-4 up to 5KVA, and the standard IEC 61558-2-4. - Single primary voltage max. 1000V. Single secondary max. 1000V. Class F insulation. - Maximum ambient temperature 45°C. Protection grade IP00 - Varnish impregnated class H and oven dried. - Low loss magnetic sheet (1.5 W/Kg). - Grain-oriented sheet for power ratings above 6KVA. Star/Delta/Zigzag coupling NB: Upon request: It is possible to add an electrostatic screen between the primary and secondary connected to a grounding terminal. Datasheet