Manually operated step controllers

Transformer STW Step Transformers

The STW & STD series step transformers enable fan motor speed control in steps. The STW series are intended for single-phase applications and the STD series for threephase applications. The STW & STD series both are available in 3 versions: manual, semi-automatic and automatic control. For each version a range with various maximum output currents is available.

STD & STW versions:

Manual step speed control

STW & STD transformers

Download the datasheet Step controllers (330 kB)

Vostermans Companies is not responsible for inaccurate or incomplete data. In case of any questions and/or remarks please contact .