Step transformer STL

Set fan speed in 5 steps

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Step transformer STL

Description

If, for example, work is to be performed during ongoing ventilation in stores and production areas, it makes sense to reduce the flow speed. The step transformer described below can be used to reduce the supply voltage to the fans and thus the air flow in the room in question. The unit is activated modularly behind the dT100 or dT200 ventilation control. Selection is made on the basis of the sum of the total currents of all connected fans, plus a 30% addition.

Example: 1 x fan AV-500 = 1 x 2.26A x 1.3 (addition) = 2.94A
-> Selection 1 x speed controller STL-5

Features

  • AC 230V/50Hz: Imax.=2.5A resp. 5.0A
  • Step switch with 5 switching steps 80, 110, 140, 170, 190, 230V (ex works: 110-230V)
  • Overload protection: T 3,15A resp 8.0A
  • Surface-mounted installation IP 54 (resistant to water spray)
  • Function principle: Transformer