Running 220V rated ballasts at 240V

[Zed]

Hi all,

I've got a problem where some ballasts are dying. They are Philips BTA
36L05 and are rated at 220V. They are used in a 240V supply.
Unfortunately last time I was onsite I didn't measure the actual
supply voltage.

They are used in a rural supermarket and all the ballasts are
contained in a steel ventilating mesh enclosure. Each enclosure
contains eight ballasts with a spacing of about an inch between them.

Is the difference in voltage rating a likely failure mode?

Regards,

Zed.

 

[James Sweet]

"Zed" <zzizz_@hot_mail.com> wrote in message
news:ubuo20djl4i14ivkgcv1b12m5f6lgeb38d@4ax.com...

Hi all,

I've got a problem where some ballasts are dying. They are Philips BTA
36L05 and are rated at 220V. They are used in a 240V supply.
Unfortunately last time I was onsite I didn't measure the actual
supply voltage.

They are used in a rural supermarket and all the ballasts are
contained in a steel ventilating mesh enclosure. Each enclosure
contains eight ballasts with a spacing of about an inch between them.

Is the difference in voltage rating a likely failure mode?

Regards,

What are these ballasts for?

 

[Art]

That difference in potential should be within the tolerance limits of the
ballast designs. IMHO >10% variation in applied voltage is probably not your
problem, however, being in a rural area, if the voltages fluctuate wildly,
say +- 10% or more, could add to your problem. Also, you are stating these
items are mounted in a steel enclosure, have you measured the amdient
operating temperature and compared it to the specifications on your current
ballast?
"James Sweet" <jamessweet@hotmail.com> wrote in message
news:Z3%Wb.293857$I06.3026238@attbi_s01...

"Zed" <zzizz_@hot_mail.com> wrote in message
news:ubuo20djl4i14ivkgcv1b12m5f6lgeb38d@4ax.com...
Hi all,

I've got a problem where some ballasts are dying. They are Philips BTA
36L05 and are rated at 220V. They are used in a 240V supply.
Unfortunately last time I was onsite I didn't measure the actual
supply voltage.

They are used in a rural supermarket and all the ballasts are
contained in a steel ventilating mesh enclosure. Each enclosure
contains eight ballasts with a spacing of about an inch between them.

Is the difference in voltage rating a likely failure mode?

Regards,



What are these ballasts for?