Need Hi Power Dimmer using Triac. 5KW or 6KW.

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mkw

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Hi...
Please i´m need an simple dimmer project to control an load that have 5500 Watts. Dimmers projects using triacs that have 5000 Watts to 7000 Watts are welcome. The voltage of the load is 220/240 VCA x 25 Ampers. The load is an resistence, that is used to heat the water.
Thanks in advance...
Any suggestion are wellcome.
Marcelo
PS. I have tried to search in elektroda board and google, but no results found.
 

You can use a very basic circuit to phase-control loads like a water heater (see drawing below), but because you will be switching ≈5kW you may like to consider a solid state device.
For example: at 25% heater demand, this may mean 0.05 seconds on, 0.15 seconds off, 0.05 on, .... This is actually 3 sinewaves on, 9 sinewaves off, 3 on, 9 off, .... Since you are switching full sinewaves, starting at the zero crossing mark and ending at the zero crossing mark, there is no noise generated and the power is permitted to start at zero and then ramp up.
Here is an example of a solid state circuit based on a triac:
**broken link removed**
Regards,
IanP
 

Hi IanP...
Thank you very much for your help.
I will assemble the circuit that you provide to see the results.
Best Regards!
Marcelo
 

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