Gallery of Lights
Lanterns/Fixtures => Modern => Topic started by: Lil'Cinnamon on April 24, 2010, 09:54:40 PM
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I don't know when, but my 250w HPS ballast in my m-250r2 fried. 8(
When I got home today, I noticed it wasn't lit, so I decided too look inside it to see if it was a loose connecton.
I opened it to find the coils of the ballast broke and lots of burn marks inside my m-250r2.
I want to get a new 250w HPS ballast to put in it to replace the old burnt out one.
I will get one. I have the money to buy another!
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If/when you get a new ballast you should order it from GE since it will match the old one and fit the cobra head ;)
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True that!
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Ballast sizes are usually the same for all cobraheads. There are usually several bolt threads inside the fixture for different ballasts. My R37 usually has a 3" X 3.5" ballast, but can also house a 4" X 5" (if I remember) ballast!
As a collector, I feel I'm doing it right ONLY if I order the "brand-correct" ballast. ;)
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True but some ballasts won`t fit (I can`t get any of my NOS 250 watt MV ballasts to fit in my OV-25)
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I had a pretty hard time fitting a 250 watt HPS ballast in my OVZ.
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in some cases there are some multiple threaded holes...and sometimes ballasts to be correctly fitted it may not be perfectly straight but a bit mounted diagonally....like my 1995 powerbracket 175 watt ballast has it a bit tilted in factory made because thats how it was setup....
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It's always good to have brackets and they've been very handy for me when I have installed new ballasts in fixtures.
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mercuryvaporrocks: you probably had trouble because Cooper's ballasts are so damn small. :8) It's a wonder they last as long as they do.......................................
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you know....i have to Wonder if the 175 Watt MV Ballasts in Cooper Yardblasters are similar to the ones in Cooper streetlights?
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You know the ballast in my OVX is a fair size, I didn't say well made but it is quite large and heavy :-\
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The streelight ballasts in Coopers probably are the yardblaster ones. Ge uses the same ballasts. AEL uses better ballasts in there streetlights than their blasters though..........................
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Well I don't think a yard blaster would have a 400 watt HPS ballast ;)
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I think that the ballasts that come in a yardlight don't have a cap on them but the ones that come with cobras usually have a cap as part of the ballast circuit or to correct PF even for the same lamp type and wattage.
So I guess the ballasts used in cobras and yardlights are different.
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@joe_347V: Those with capacitor are likely CWA, those without HX autotransformer. Even when the core&coil unit look very similar, they work in way different ways (and are not interchangeable): The HX provide only an impedance, so lamp current strongly depend mainly on the actual mains voltage, so require quite tight tolerance of the mains voltage.
The CWA, in the other hand, tend to regulate the lamp current and keep it rather independent on the mains voltage, so the setup is able to operate even with quite large drop on the feed wiring, what is handy in far reaching road lighting.
The drawback of the CWA is higher current crest factor, what cause higher load on lamp electrodes, so a bit faster aging,, so it make sense really only on places with poor mains voltage tolerance.
Sadly the simplicity of an HX trigger the assumption, then this should be cheap product, so the manufacture quality use to be worse then CWA...