Electrical Advice

[Parker]

Originally Posted by gregzz4

Are these recent failures replacement ballasts, or more old units failing ?

All three PFO ballasts were brand new, and the Galaxy's as well. That's six ballasts total.

Originally Posted by gregzz4

Have you tried testing the supply voltage during start-up ? A voltage drop/low start-up voltage will fry a ballast over time

I tested the voltages after the failure of the first three, everything seemed to be fine, nothing looked out of range.

Originally Posted by gregzz4

Have you opened any units to determine what is failing ? Capacitor/windings

I haven't but I have two most recent failures I can crack open.

Originally Posted by gregzz4

Maybe a dumb question but, are you matching the recommended bulb types ?

I'm running 400W DE HQI Bulbs and Ballasts