KH1 time lag switch is a quick and effective way to reduce energy consumption for lighting applications. Pressing the button brings the lights on; the lights will then switch off automatically after a preset time period has elapsed.
The unit does not require a neutral connection, therefore it can be used to replace an existing light switch.
The duration of the time delay is set by a thumbwheel on the reverse of the unit.
The KH1 comes with extra terminals to allow slave switches to be connected to the system to trigger the timer.
Time lag switches can be used in two way and intermediate switching arrangements without any extra wiring.
Load: 10A of lighting including incandescent, fluorescent, compact fluorescent, low voltage (switch primary of transformer).
Most fluorescent fittings have power factor correction capacitors fitted. If they are not present the unit may fail to turn off properly or flicker. In this case fit one capacitor per circuit with a minimum value of 1F for every unit installed. The capacitor should be fitted across switched live and neutral. Note that it is not necessary to fit a capacitor on every fitting. This also applies to fittings controlled with high frequency ballasts and maintained emergency fittings.
Not suitable for switching contactors, SON lighting, or for heating or ventilation loads.
Product Specifications:
- Supply Voltage: 220-240 Volts AC 50 Hz.
- Time Out Period: 20 seconds to 20 minutes (approximate).
- Fixing Method: Surface fixing 25mm deep plastic surface mount moulded box.
- Flush fixing 25mm steel wall box or 32mm deep cavity wall box.
Wiring scheme and instructions for this time lag switch - pdf file.
