STR-4

classic 3*400 V transformer fan speed controller

The STR-4 transformer speed controllers are based on the principle of voltage control with auto-transformers. They are applicable to voltage-controllable motors (400 Vac, 50/60 Hz) to control the rotational speed (of fans, pumps, etc.) in steps.

• 400 Vac - 50/60 Hz - from 1,5 up to 18 A
• Enclosure: sheet steel (RAL 7032, polyester powder coating), IP54
• Switch: 5 positions with Off-position
• Indicator light
• 230 Vac unregulated output

datasheet mounting instructions declaration of conformity