Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 2 replies
  • Subscribers 19 subscribers
  • Views 660 views
  • Users 0 members are here
Options
You may also be interested in
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Power Factor correction capacitors rated at 400V on a 415V system - is this an issue

Dave wood

We have a PFC system that has been working happily for 10+ years. The first stage has now blown. The maintenance supplier has stated that as the capacitors are rated at 400V and the system is 415 that is the issue and we should replace all of the capacitors across site. Does this sound correct? if this was an issue surly they would have gone earier. I tend to think the issue is the first stage has been in constant use and has worked past its life expectancy. - any thoughts.

Parents
  • 0

    I would expect that 400 volt capacitors should be suited for use on 400 volt NOMINAL supplies. Including almost all public supplies in the UK. Even if the actual measured voltage is at the upper limit of reasonably expected variation.

    I would expect long term use at up to 440 volts to be fine, since the actual voltage of a public supply can vary between 94% and 110% of the nominal voltage.

    A private supply might operate at some higher voltage, but this is very rare, most private supplies are similar to public supplies so as to utilise standard equipment.

Reply
  • 0

    I would expect that 400 volt capacitors should be suited for use on 400 volt NOMINAL supplies. Including almost all public supplies in the UK. Even if the actual measured voltage is at the upper limit of reasonably expected variation.

    I would expect long term use at up to 440 volts to be fine, since the actual voltage of a public supply can vary between 94% and 110% of the nominal voltage.

    A private supply might operate at some higher voltage, but this is very rare, most private supplies are similar to public supplies so as to utilise standard equipment.

Children
No Data

Community Rules & Guidelines