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Post by beotownsend on Feb 9, 2013 15:10:41 GMT -5
Is it possible to dim a forward-phase LED switch leg (120v lamps) effectively and reliably with a Hybrid Keypad; provided that the total wattage for the leg falls in-line with the wattage requirements of the Keypad? And for that matter, also what about the standard RRD-6D dimmer?
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Post by hanshi on Feb 9, 2013 16:36:50 GMT -5
Dimming LEDs with 2 wire dimmers like the 6D is often challenging due to the LED lamps not meeting the minimum load of the 6D (50W) in the off state. The Hybrid Keypad, with the neutral connected, can have the ability to work well with some LED lamps. The best place to check for compatibility is at www.lutron.com/led and using the product selection tool. We do out own lamp testing and post all good results in that tool. If the Hybrid Keypad or the specific lamp/fixture you are trying to dim is not listed, then you could perform your own testing by hooking the Hybrid Keypad up to the load and verifying performance. You can trim out the high and low end in the software if necessary. As a rule of thumb, if the lamp has not been tested by us, consider each LED lamp or fixture as 100W equivalent incandescent. The repetitive peak inrush current every half cycle can make the lamp look like a much larger wattage to the dimmer even though the LED is rated for a much lower wattage. This can overload the dimmer so use the 100W rule of thumb. |
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Post by beotownsend on Feb 9, 2013 18:14:31 GMT -5
The issue that we are having is that my client swears he looked at the LED list/tool and selected a bulb, yet I checked with you guys and there isn't anything remotely similar to it on any list. Normally, I'd say just get new ones, but there are literally about 150 of these in the home, and they happen to be up in cans about 30 feet up from the floor for about 50 of them.
My project manager, who spec'd this project out about a year ago, didn't do his home work (Even though he's gone through L2 Advanced class with Blake) and made the promise that everything would work; while not checking for neutrals and also specifying 6D dimmers. I couldn't check his work back then, because I hadn't gone through any kind of Lutron training (I'm now L2, and L3 once they finish reviewing the accreditation stuff). Basically, I'm trying to see what I can do.
What should we use as the general rule of thumb for the load of each lamp when the lights are off (I'm guessing that's the rated wattage of the lamp; for an example 13 watts a lamp)?
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Post by beotownsend on Feb 9, 2013 18:29:51 GMT -5
Also, these lamps that are in there seem to dim just fine with a Diva 600 Watt 3-Way dimmer (DV-603P), so I'm trying to use quick solutions via "detective work" rather than waiting to have them lab tested
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Post by hanshi on Feb 9, 2013 23:47:58 GMT -5
The 13W in off state is a good rule of thumb. Don't wait for the lab to test if they aren't on the list. I recommend doing your own testing with 6NAs, 10NDs, and HxBRL units. You could try the 6Ds but I have a lot of doubt there. No risk trying, though.
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Post by hanshi on Feb 9, 2013 23:49:36 GMT -5
Out of curiosity, what LED lamp/fixture are you dealing with in this application?
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Post by beotownsend on Feb 10, 2013 18:10:37 GMT -5
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