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Info about power rating of dimmer 2


Jibran

Question

Hello,
 
I have read some technical specs of dimmer 2. There are some issues i want to know about.
 
1.  In spec sheet it is written that it can support load upto 1 ampere only. 
 
2.  It is also written that it can handle led upto 170w . Other words 200 to 220VA
 
3. I have leds whose driver ( transformer) have output current = 240ma , output voltage = 30v and power factor = 0.95.
 
Now i want to know that if 8 leds of that spec is connected to dimmer 2 then what will happen? Because if we look at the load with respect to power then 8*7(watt) = 56w. But if we look with respect to current then these 8 leds will have a current of 1.92 amps that is 8*.240= 1.92 amps
 
Please If anyone know about this, do tell me . That will be very grateful.
 
Thankyou
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@Jibran  They recomend load under 50w you need to fit a fibaro dimmer bypass to avoid flickering and glow when off etc, so at 56 watts you should be fine.

Edited by Jamie mccrostie
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Concerning your point 3: you say :"output of the transformer"? The dimmer doesn't care about the output current of the transformer, it cares about the input current of the transformer. If you still have doubts, please post the specification sheet of the transformers/adapters/drivers or whatever you want to call them.

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  • Inquirer
  • I have check the input of transformer. Its 150ma current. So how many LEDS i can connect with dimmer 2 ? It seems it can handle only 5 to 6 leds then ? 

    Edited by Jibran
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    So 1 A / 0.15 A is six lamps. You might try eight bulbs, because "dimmer 2" is very well protected. If the load causes problems, the dimmer will shut down. There might be an issue with inrush current too, that's something that is rarely written on the adapters (or even the spec sheet). Rule of thumb: maximum 10 lamps per dimmer 2. Also be prepared: you might have to split your circuit into 2x4 lamps and use two dimmers. BTW these adapters/transformers/drivers are made for dimming? You dim them now?

    Edited by petergebruers
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