Our Products
RuckDemand Control Ventilation Commercial & Domestic FansIndustrial FansDuct Heaters & CoolersUnit Heaters & DehumidifiersAir Handling Units & Heat Recovery UnitsGrilles & DiffusersRoof HoodsChilled BeamsSpecialist Low Leakage DampersVolume, Fire & Smoke DampersFan Coils UnitsVAV's & CAV'sSilencersControllers

Auto Transformer Speed Controllers

STR-4 Series Controller
STR-4 Series Auto Transformer Controller (Internal)

STR-4 Series Auto Transformer Controller

Transformer controllers, 3~400 Vac, 50/60 Hz, in different types from 1,5 up to 18 A.
- Handsetting, 5 positions + off.
- Indication lamp.
Sheet steel enclosure, IP 54.