KH3
Product Guide
Weatherproof Electronic Time Lag Switch
The KH3 time lag switch is a quick and effective way to reduce
energy consumption for lighting applications. Pressing the touch
pad brings the lights on; the lights will then switch off automatically
after a preset time period has elapsed.
These units do not require a neutral connection, therefore they 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 KH3N has a neon illumination to allow the unit to be located in
the dark.
Time lag switches can be used in two way and intermediate switching arrangements without any extra wiring.
Overview
Wiring
Conventional Wiring
Wire the units as in diagram 1. When using multiple switch positions see diagram 2.
For two way and intermediate switching follow the diagrams overleaf. Note that as long as each switch position has a Live feed
and a Live Out connection to the load then the switch will be
properly wired.
Ensure that all cable entry to the enclosure is via suitable
cable glands and seal with silicone sealant where appropriate.
If it is necessary to screw through the rear of the enclosure
ensure that any holes are covered with the caps provided
and sealed with silicone sealant where appropriate.
Diagram 1
Conventional
wiring
Installation
Warning. This device works at mains potential. Be sure to take care when
working with electricity.
1. Make sure the load is connected and in working order.
2. Isolate the mains supply to the circuit at the main consumer unit.
3. Connect the controller via the terminal block. Live supply to the L
terminal and the load to the LIVE OUT terminal.
4. Push the override switch to the off position (see diagram).
5. Set the timing range using the thumbwheel. Turn clockwise to
increase timing.
6. Screw the unit to the wall and switch the mains supply back on at
the distribution board.
7. Wait 20 seconds before pushing the touch pad
8. Push the touch pad and the lights will come on
9. Wait for the time period and the lights will turn off again.
Diagram 2
Multiple switch
locations
Fault Finding Specification
LIGHTS DO NOT COME ON
Check to see if the live supply to the circuit is
good. Strap across the L and LIVE OUT terminal to turn the load on.
LIGHTS DO NOT GO OFF
Ensure that you have waited for the time out
period.
If the lights still do not go off then it is likely the
unit was not given the 20 seconds start up period on installation. Follow this procedure:
1. Isolate the mains supply to the circuit at
the main consumer unit and unscrew
the unit from the wall.
2. Push the override switch to the off position.
3. Reapply the mains and wait for 20 seconds.
4. Activate timer as normal.
LIGHTS FLICKER
Ensure that there are sufficient power factor
correction capacitors fitted.
LOAD
10A of lighting including incandescent, fluorescent, compact fluorescent, low voltage (switch
primary of transformer).
Fluorescent and compact fluorescent fittings with “switch start” ballasts - 10 ballasts maximum.
Power factor correction capacitors must be fitted.
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 1μF 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
Not suitable for SON lighting
Not suitable for heating or ventilation loads.
Please contact our sales department for a suitable alternative product.
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.
TERMINAL CAPACITY 1.5mm2
IP RATING IP 66
MATERIAL Flame retardant ABS
TYPE Class 2
TEMPERATURE -10°C to 35°C
CONFORMITY EMC-2004/108/EC
LVD-2006/95/EC
Part Numbers
KH3 Weatherproof electronic time lag switch touch activated
KH3N Weatherproof electronic time lag switch touch activated with neon
IMPORTANT NOTICE!
This device should be installed by a qualified electrician in
accordance with the latest edition of the IEE W iring
Regulations and any applicable Building Regulations.
FM 45789 EMS 534520
Due to our policy of continual product improvement CP Electronics reserves the right to alter the specification of this product without prior notice.
C.P. Electronics Ltd
Brent Crescent
London
NW10 7XR
United Kingdom
Tel: + 44 (0) 333 900 0671
Fax: + 44 (0) 333 900 0674
www.green-iswitches.co.uk
enquiry@green-iswitches.co.uk
Ref: #WD133 Issue 7
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