Driver watts

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Pulses

Member
have a 4 light setup clu058-1825 citizens and 2 hlg-240h-c2100a drivers. These are rated at 249 watts each.my setup takes 180 watts dimmed and 580 up ? How is that possible. Also rated 2.1 amps each but uses like 4.8 for two units ? Is something not right with this. Also both drivers put same wattage out.
 
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iHearAll

iHearAll

Well-Known Member
it just sounds like you are pushing the drivers pretty hard when fully open. the circuit component can certainly perform this task for some time, but if anything is getting hot or even very warm, it is likely to overdraw your power supply and cauae for a bad day. what wrre you planning on running them @?
 
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Pulses

Member
iHearAll said:
it just sounds like you are pushing the drivers pretty hard when fully open. the circuit component can certainly perform this task for some time, but if anything is getting hot or even very warm, it is likely to overdraw your power supply and cauae for a bad day. what wrre you planning on running them @?
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Probably around 100 watts each should be ok. do you know how I take tj temperatures. Point gun where?.
 
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Pulses

Member
guy_incognito251 said:
The hlg-240h-c2100a is rated to output between 1050-2100ma (depending on what the potentiometer is set to) however the actual output in the meanwell test report for this driver is between 800-2400ma - see test 4 in this pdf:

http://www.meanwell.com/webapp/product/search.aspx?prod=hlg-240h-c&pdf=SExHLTI0MEgtQzIxMDAtcnB0LnBkZg==&a=2

So if you have the pot turned all the way up each driver could output 2.4A
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2.4 is exactly what it puts out 290 watts. Yes I'm afraid 145w is going to be to much heat for the sst-x passive sinks
 
P

Pulses

Member
Pulses said:
2.4 is exactly what it puts out 290 watts. Yes I'm afraid 145w is going to be to much heat for the sst-x passive sinks
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Just checked temps at 100w per cob sink Right on top of cob is 115 degrees f Specs on this cob shows 220f case temp and like 280tj temp f. Don't know if I dare run any higher
 
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guy_incognito251

guy_incognito251

Well-Known Member
Is the 2.4A / 290W the input current / power you are reading off a kill-a-watt (or similar) or the DC output of the driver measured using a multimeter?

At full load 2.4 to 2.5A is the normal input current for the driver at 115V AC (so close to 290W). It should be around 91% efficient so the output should be ~260W or 130W per cob (with 2 1825 in series per driver at 2.4A and ~53V each).

The case temperature measurement point Tc is at the cathode (see mechanical dimensions in the data sheet: http://ce.citizen.co.jp/lighting_led/dl_data/datasheet/en/COB_5/CLU058-1825C4_P3372_1115.pdf ) - you may be able to measure Tc using a thermocouple although this will be difficult if you're using a cob holder.
 
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