Re: CBus power usage

[John Benfield <john.benfield@xxxxxxxxx>]

Keith,

Interesting idea about turning the MCB's off.

I have 40 channels currently in use. With the main circuits on but the
MCBs off, it would appear that the CBus modules, switches & PIRs are
only taking about 20w in total - very acceptable. The rest appears to
be being gobbled up after the MCB - so I guess the transformers. I'm
going to have a longer play later and literally go circuit by circuit
to see where the biggest culprits are.

JB

2009/3/31 John Benfield <john.benfield@xxxxxxx>:
> Oh I do know that when I CBus dimmer is "OFF" you can still
get a
> shock from the transformer - gave me a nasty surprise once :-(
>
> 2009/3/31 Keith Doxey <ukha@xxxxxxx>:
>>
>> As I think it was Keven who said, a lot of that power could be
leakage
>> through the dimmers. Not having C-bus I don't know if they
physically
>> disconnect the loads when "OFF". If they don't then
there will be a small
>> amount of leakage through the snubber circuits in the dimmers. If
you have
>> MCBs on the outputs as some people have done, flick them all off
to see what
>> the consumption of the Cbus kit is without any loads connected.
>>
>> I know that Lutron in there high end dimmers have triacs that do
the dimming
>> 0-100% but thet there is also a relay that physically breaks the
circuit
>> when OFF as opposed to 0% thereby removign all leakage currents.
It also
>> means that in the event of a triac blowing (the usually fail short
circuit
>> leaving a lamp on) you can still turn the light off.
>>
>>
>> Keith
>


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