LightwaveRF voltage leakage

4 Jan 2011
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United Kingdom

I'd like to use a LightwaveRF in-line dimmer on a light fitting that has a transformer and low voltage bulbs. The dimmer can be set to disable the dimmer function, so provides full 240V when on, but like most LightwaveRF lighting switches, it leaks voltage when off.

I'm trying to find out if the voltage leakage of 2 volts is safe when going into a transformer, rather than 240V LED bulbs.

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Very un-likely to be dangerous but whether or not it works depends on the type of "transformer" in the light fitting.

The LightwaveRF device requires a small amount of current ( not voltage ) to flow through the light fitting when it OFF to power the electronics inside the LightwaveRF device.

A wound magnetic transformer will allow that small amount of current to flow. The lamp may glow very dimly due to this current flow.

Some types of "electronic" transformer may not allow enough current to flow.

Some types of "electronic" transformer may allow enough current to flow but will then cause the lamp to glow slightly when the switch is OFF

Some types of "electronic" transformer may allow enough current to flow but will then cause the lamp flash when the switch is OFF
I use Energenie and it tells you it should not power a transformer, as with lightwave there is always a small current, I found bulbs need to be over 5 watt, it does not work with 5 bulbs at 2.2 watt, but will one bulb at 5 watt, I had to fit a load capacitor for the lamp with 5 x 2.2 watt G9 bulbs, had to swap bulbs with GU10 lamps, but the BA22d and E14 lamps worked A1 as far as any flashing or dim bulbs go. Same make as a socket and it is completely off. Mine are so I can switch off light when in bed not to dim lights, not really impressed with them, but main problem is a naughty boy called Nest Mini who will not do as he/she is told.
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I had the same issue with minimum load on a LightwaveRf multi gang dimmer switch, but the in-line dimmer doesn't have the same issue, as it's positioned at the outlet and has permanent +ve and -ve. I've tested it's operation that's when I noticed the low current when "OFF". Just looking for advice on whether that would cause an issue with the transformer it supplies.

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