To be plugged into a free and easily visible socket for a continuous control of the functionality of the demand switch (only lights up when under power).

For mounting directly on the Demand Switch 1.0 uF capacity , self-healing, with VDE certification. The line filter reduces voltage peaks from the public power supply polluting the home power network ("dirty power"), it enhances the...

For mounting directly onto the demand switch 4.7 uF capacity , self-healing, with VDE certification. Therefore, this unit has a higher efficiency than even four units of the X21. The line filter reduces voltage peaks from the public...