The IET is carrying out some important updates between 17-30 April and all of our websites will be view only. For more information, read this Announcement

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 14 replies
  • Subscribers 31 subscribers
  • Views 2621 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

Neutral Point of Heater Bank

FornhamSpark
Hi,

I have an application to control a bank of resistive heating elements (52Kw) in a Star configuration from a Eurotherm Power Management unit to control heat output.

Is it standard practice to connect the Neutral Point to Neutral ?
Parents
  • 0
    In that situation the motor has failed and will probably require a rewind - further failures in the winding do not change that. 


    If heaters are connected in banks and one element in the bank fails then a replacement element would return the heater to full capacity.  The omission of a  neutral on this type of load can cause the failure of the whole bank as the voltage rise will stress the remaining elements.  If a neutral is connected the voltage will remain stable and further failures due to voltage stress would not occur.


    This is not a safety issue and is not AFAIK the subject of any regulation - however, the heaters I mentioned were replaced because the manufacturer accepted that the method of installation contributed to premature failure.


    Regards


    Geoff Blackwell
Reply
  • 0
    In that situation the motor has failed and will probably require a rewind - further failures in the winding do not change that. 


    If heaters are connected in banks and one element in the bank fails then a replacement element would return the heater to full capacity.  The omission of a  neutral on this type of load can cause the failure of the whole bank as the voltage rise will stress the remaining elements.  If a neutral is connected the voltage will remain stable and further failures due to voltage stress would not occur.


    This is not a safety issue and is not AFAIK the subject of any regulation - however, the heaters I mentioned were replaced because the manufacturer accepted that the method of installation contributed to premature failure.


    Regards


    Geoff Blackwell
Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines