System 3000 universal LED rotary dimmer insert Comfort features: Switching and dimming of incandescent lamps, HV halogen lamps, electronic transformers for halogen or LED lamps, dimmable inductive transformers for halogen or LED lamps, HV LED or compact fluorescent lamps. Connection of extensions possible. Automatic or manual setting of the dimming principle suitable for the load (leading edge or trailing edge). Display of the set operating mode via LED. Lamp-friendly switching on. Switch-on brightness can be saved permanently. Switch on with the last set brightness or saved switch-on brightness. Hotel card function can be activated: light switches 'on' after a power interruption (from index 01). Minimum brightness can be adjusted. Electronic short-circuit protection. Electronic overtemperature protection. Operation with and without a neutral conductor connection. Notes: The dimmer can generally be operated without a neutral conductor connection, but some LED and CFLi lamps require a neutral conductor connection to avoid flickering. When operating without a neutral conductor, the minimum load for incandescent lamps, HV halogen, Tronic transformers and wound transformers increases to 50 W. Electronic transformers and ballasts for LED lamps can be operated using the dimming method specified by the manufacturer. If the ambient temperature is higher than 25 C, the connected load must be reduced.