5-stage transformer for speed adjustment. For controlling three-phase fans. With operating indicator light. Article: TR 6.6-2, Voltage type: three-phase current, Rated voltage: 400 V, Mains frequency: 50 Hz / 60 Hz, Rated power: 3300 W, Maximum load: 6.6 A, Protection class: IP 54, Secondary voltage: 105 V / 150 V / 190 V / 250 V / 400 V, Installation type: surface-mounted, Housing material: metal, Color: light gray, similar to RAL 7035, Weight: 26.84 kg, Weight with packaging: 28.31 kg, Width: 400 mm, Height: 300 mm, Depth: 240 mm, Width with packaging: 420 mm, Height with packaging: 305 mm, Depth with packaging: 340 mm, Ambient temperature: 0 °C to 40 °C