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Improving power factor on 18w SOX ballast

Improving power factor on 18w SOX ballast

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As you know these use about 1.10 amp and are around 0.32 PF. I added two capacitors in parallel to the system and have improved it.

No cap:
PF = 0.32
A = 1.10
W = 42

With cap (3.5uf + 4 uf)
PF = 0.44
A = 0.78

Seems like it works great. Wondering if this will let the ballast run cooler. This is just an experiment however. I would need to find a proper cap for it if i went this route

20190825_223719_HDR.jpg 190816_003610_COLLAGE-1.jpg 20190810_163535.jpg 20190805_190513.jpg

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Filename:20190810_163535.jpg
Album name:Lightingguy1994 / Lamp comparisons, ballast fun & Experiments
Keywords:Gear
File Size:866 KB
Date added:Aug 10, 2019
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Date Time:2019:08:10 16:35:35
DateTime Original:2019:08:10 16:35:35
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Make:LG Electronics
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wishus
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Aug 11, 2019 at 11:59 AM Author: wishus
Hmm, that's interesting. Is that a Philips ballast? I have an old style ballast as well (long thin rectangular), only there are no entries on the label for power factor Condensor and voltage values, they are left blank.
I have a newer style Advance ballast and it recommends a 5 mfd 250V capacitor for power factor correction. I am not sure how similar the ballasts are though.
You can see the comparisons between the two on my page: https://www.lighting-gallery.net/gallery/displayimage.php?album=3254&pos=5&pid=94734

Interested mainly in discharge lighting (mercury, sodium, neon) and also old and unusual incandescents.

Lightingguy1994
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Aug 11, 2019 at 01:53 PM Author: Lightingguy1994
I think its a Philips, it came from the goldeye fixture
don93s
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Aug 11, 2019 at 06:30 PM Author: don93s
A cap in parallel with the primary side won't change the ballast operation but the reduction in line current will reduce the load stress on the mains circuit.
Lightingguy1994
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Aug 11, 2019 at 07:02 PM Author: Lightingguy1994
I figured so. I have purchased a new ballast so this one will be retired
Seth11
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13 watt Color CFLs!


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Aug 11, 2019 at 08:25 PM Author: Seth11
When the cap was added, does it affect the light output of the lamp?

NO MORE ELECTRONIC BALLASTS!!!!!!!!!!!!

MAGNETIC BALLASTS FOR EVER!!!!!!!!!!!!!!!

SAY NO TO BULB AND MAGNETIC BALLAST BANS!!!!!

Lightingguy1994
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Aug 11, 2019 at 08:33 PM Author: Lightingguy1994
No I didn't notice any difference. and I had it set up where I could connect the cap on and off while it was running , i could hear a change in the hum slightly though
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