175W mercury vapor

[koenton]

Does a mv-175w light

Does a mv-175w light

Can anyone tell me if a mv-175w light supose to have 120 volt going in and 230 volts out to bulb?
Thanks

 

[ptonsparky]

It is a transformer you are working with. Try going to advance ballasts & see if they have trouble shooting or FAQ.

 

[stevebea]

Can anyone tell me if a mv-175w light supose to have 120 volt going in and 230 volts out to bulb?
Thanks

Advance Ballast calls for 215V open circuit voltage.

 

[rwade0700]

Will a MV bulb "cycle" on and off ? Customer called saying it will stay on for an hour or so, turn off, then re light. My guess is either lamp or ballast, which would be the most likely? BTW owner says lamp is about 5-6 years old. Thanks.

I have never known a Mercury Vapor lamp to cycle on and off, I just see them lasting a long, long time giving less and less lumen output until they are just emitting a small glow.
The lamp in the luminaire could be the wrong lamp for the ballast and could be cycling on and off or there could be light interferring with the photoeye if one exists.
I don't think that these ballasts have a thermal cutout either.
The easiest thing to do is to remove and replace the lamp with the proper lamp matched to the ballast and see if that makes a difference.
You could always replace the fixture with a new one, it is probably cheaper than replacing the ballast.

 

[readydave8]

I have never known a Mercury Vapor lamp to cycle on and off, I just see them lasting a long, long time giving less and less lumen output until they are just emitting a small glow.
The lamp in the luminaire could be the wrong lamp for the ballast and could be cycling on and off or there could be light interferring with the photoeye if one exists.
I don't think that these ballasts have a thermal cutout either.
The easiest thing to do is to remove and replace the lamp with the proper lamp matched to the ballast and see if that makes a difference.
You could always replace the fixture with a new one, it is probably cheaper than replacing the ballast.

175w wall cubes with MH or MV lamps will cycle on & off, according to how its mounted either change ballast & capaciter or as you say the whole thing and get a new, clear lens in on the bargain.

 

[hurk27]

175w wall cubes with MH or MV lamps will cycle on & off, according to how its mounted either change ballast & capacitors or as you say the whole thing and get a new, clear lens in on the bargain.

I was thinking that only HID's with starters/igniter's are the ones that can cycle?

I know of no MV or even older MH below 150 watts that have igniter's, only HPS and pulse start MH?

 

[hurk27]

A lineman school in NE recentlyhad a trainee die from a fall while learning this pole climbing skill. We have done it from a ladder for years but more & more I start looking for a bucket truck.

Falling, sliding back down a pole and you will have wish you fell, all those little spike holes leave a nasty splinter sticking out at the top that will ripp into your skin as you slide down, no fun at all, spent a day at the hospital picking out splinters in my arms and legs after my homemade spike shoes failed about 10' off the ground years back, never again.

 

[ptonsparky]

Falling, sliding back down a pole and you will have wish you fell, all those little spike holes leave a nasty splinter sticking out at the top that will ripp into your skin as you slide down, no fun at all, spent a day at the hospital picking out splinters in my arms and legs after my homemade spike shoes failed about 10' off the ground years back, never again.

:grin::grin::grin:..sorry:grin::grin::grin:

 

[readydave8]

I was thinking that only HID's with starters/igniter's are the ones that can cycle?

I know of no MV or even older MH below 150 watts that have igniter's, only HPS and pulse start MH?

This is what I've seen at many car washes, I always assumed that it had to do with heat and some kind of thermal cuttoff in ballast but I never did the research to find out why, I just fixed them. Usually by changing all parts that could be affecting problem. Some say that usually it's just the capaciter causing problem.

Car wash owners don't always know that their lites are cycling because they're not there all night.

Is it possible that I was wrong and that some kind of drop in voltage was making some lites go out and restart but not others? (at 20-30 different locations).

 

[kwired]

Ignitors provide the pulse need to start the arc and have nothing to do with the arc being extinguished other than the fact they will be called upon again to restart the arc. HPS lamps cycle near end of life because they draw more current the more hours they have in run time. This current eventually becomes more than the ballast can supply and the arc is extinguished when the current falls below what is needed to maintain the arc. The lamp cools a bit and the cycle starts over.

 

[kwired]

This is what I've seen at many car washes, I always assumed that it had to do with heat and some kind of thermal cuttoff in ballast but I never did the research to find out why, I just fixed them. Usually by changing all parts that could be affecting problem. Some say that usually it's just the capaciter causing problem.

Car wash owners don't always know that their lites are cycling because they're not there all night.

Is it possible that I was wrong and that some kind of drop in voltage was making some lites go out and restart but not others? (at 20-30 different locations).

If voltage drops below level needed to maintain arc in the lamp the lamp will go out. If voltage returns to high enough level the lamp will restart - after the pressure in the arc tube falls low enough to allow starting. With HPS this can be as little as a minute or so, with MH it can be 10 minutes or more. I think PSMH are closer in time to HPS.

 

[stevebea]

If voltage drops below level needed to maintain arc in the lamp the lamp will go out. If voltage returns to high enough level the lamp will restart - after the pressure in the arc tube falls low enough to allow starting. With HPS this can be as little as a minute or so, with MH it can be 10 minutes or more. I think PSMH are closer in time to HPS.

Pulse Start Metal Halide 1-2 minutes hot restrike.