MH ballast output Volt

[Rewire]

What is the correct output voltage for a 70W MH ballast with 120v input

 

[S'mise]

Think its about 200v. Caution dont fry your meter. Ignighters are about 20kv.
unplug it first.

see http://www.advancetransformer.com/uploads/resources/hid-troubleshooting-guide.pdf

 

[danickstr]

I saw that the electronic ballast continues to try to start the light...10 to 30 minutes...how would you know to avoid the 20k voltage while metering???

 

[barbeer]

Same volts as a ballast with 277v input! :smile:

 

[480sparky]

Same volts as a ballast with 277v input! :smile:

Or 208, or 240, or 480......

 

[barbeer]

Note to my fellow forum friends: I will be on vacation Nov 22-29, going to Texas to visit family, and will not be posting during that period.
I wish you all a Happy Thanksgiving!

Have a good Turkey! Sorry you have to visit Texas! :roll:

 

[480sparky]

Have a good Turkey! Sorry you have to visit Texas! :roll:

Darn sight bit warmer than Iowa!

 

[frenchelectrican]

Rewired.,

Typically 70W MH open circuit voltage useally run 180~230 volt range depending if probe start or pulse start.

However if you really want to test the open circuit voltage make sure you disconnect the ingitor first before you do the testing.

Merci,Marc

 

[glene77is]

A meter with Logrithmic Display could indicate this very wide range of voltages.
But, then you may have to design your own.
I did this on a smaller voltage instrument, with 7 decades of resolution, at 1 percent.
Your scale would have to range from 20K to .2K which would be 3 decades.
I designed a logrithmic amplifier for this purpose.
The instrument is posted on the Linear Technologies SPICE forum website.
You would have to bridge the input
to bring your sample voltage down to the 0 - 100 volt range.

Not every electrician has done this kind of instrumentation,
nor likes to think about these things.

Most of my associates buy instruments.

I don't think you will run out, and jump on this horse!