In particular for easy speed adjustment of fans and pumps DOLD developed a range of 1- and 3-phase speed controllers. Their function principle is based on the phase-angle control by thyristors.
- Easy speed variation to adjust the load to the driving machine
- Less EMC problems compared to frequency converters, therefore no need for shielded cables saves cost
- Phase-angle control to adjust the speed of non-complex pumps or fan drives
- Also suited for ohmic loads
To adjust the speed of exhaust air fans for canteen kitchens or for temperature control of electrical heaters, for example.
Speed controllers and phase controllers
|1-phase AC- motors 230 V||3 AC-Motoren 400 V|
|with analog control
|0.3||1||+||+||Distribution board: 53||IN 9017|
|Standard||1.5||1||+||+||+||for outdoor installation:
|Standard||5.5||3||+||+||+||for outdoor installation:
100; 122; 168