Question concerning Phase drop.
Question concerning Phase drop.
(OP)
Not too long ago we had power feed problems to the facility that I'm presently managing. After power was restored we noticed almost half of the fluorescent bulbs in the gymnasium did not come back on and we found they were burnt out. My question is could the dropped phase be the cause of this damage? We had to change out over 800 fluorescent lamps afterward.
Thanks for any info
Tom....
Thanks for any info
Tom....






RE: Question concerning Phase drop.
RE: Question concerning Phase drop.
This is a large Physical Fitness Center on a government installation.
We have three phase feed to the facility and we lost one phase.
The facility was supposed to have phase protection but apparently it didn't work. It wreaked havoc on our pump motors, a digital pool chemical controller and about half of the fluorescent bulbs in the gymnasium.
The lights are six to a fixture and we have 268 light fixtures in the gym they are on a relay system using Proline T8 #GE232-10V -N 120 -277 Volts 50-60 Hz Ballasts
There were very few lamps burnt out prior to us dropping a phase, but afterward almost half the lamps were burnt up..
Could this have been a result of the phase drop?
Thanks for any reply..
RE: Question concerning Phase drop.
Hard to tell since you haven't described what exactly, , consisted of.
You also haven't told us which way those ballasts are wired, 277V or 120V?
Keith Cress
kcress - http://www.flaminsystems.com
RE: Question concerning Phase drop.
If there was no electricity there would be no internet. Good point, don´t you? :D
RE: Question concerning Phase drop.
I'm not familiar with the GE ballast you mentioned and its possible failure modes. Its difficult to believe that a modern electronic ballast would damage a lamp due to low voltage. But there are some phenomena that could result in high voltages (ferroresonance) which may be triggered by certain types of system failures.