Dimensions and technical details 5-step transformer Maximum load: 0.45 A Steps: 75 / 110 / 150 / 180 and 230 V Max. permitted ambient temperature 40°C Insulated energy-saving transformer 2-pole, illuminated on / off switch​ Little interference liability, low-loss and noiseless fan operation Housing: made of synthetic material Colour: white housing suitable for surface-mounted installation on the wall housing for flushed-mounted installation is available separatelyIn order to control the speeds of motors that have an option for speed control, transformers are used. The SCNR5 series is designed for ceiling fans (SCNR5), or in-line and wall fans (SCNR5- CA).  Model Item description SCNR5 5 speed step transformer, only for ceiling fans, on / off switch SCNR5-CA 5 speed step transformer, NOT for ceiling fans SCNRL5 5 speed step transformer with additional light switch, on / off switch, only for ceiling fans with lighting SCRR5 5 speed step transformer, with additional light switch, on / off switch, additional switch for reverse function, suitable for all reversible ceiling fans of the Nordik and Tropical IPX5 range SCRR5L 5 speed step transformer, with additional light switch, on / off switch, additional switch for reverse function, suitable for all reversible ceiling fans with light of the Nordik range