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
  • Replies 5 replies
  • Subscribers 37 subscribers
  • Views 150 views
  • Users 0 members are here
Options
You may also be interested in

Supply requirement for heaters

whjohnson

Been asked to look at provision of a new supply for  a 72KW TPN blow heater. Am getting current per phase coming in at over 100A with a cable size of 35mm 4 core. Having taken this as correct, am now looking at a 36KW option instead. Current is coming in at around 52A with a cable size of either 10mm 4 core or 16mm 4 core. I don't know anything else at the moment until I visit the site next week, but am not confident that these valuses are correct for the KW ratings.

Have assumed a pf of 1 for resistive load. Don't know how the elements are configured in the heater and am guessing the neutral is required for the fan motor and controls.

Input gratefiully recieved..

Parents
  • 0

    am not confident that these valuses are correct for the KW ratings.

    My calculations give 104.3A and 52.2A - so in agreement with yours I think. I also notice that web site suggests a 125A extension lead to be used with the 72kW version - so that stacks up as well.

       - Andy.

Reply
  • 0

    am not confident that these valuses are correct for the KW ratings.

    My calculations give 104.3A and 52.2A - so in agreement with yours I think. I also notice that web site suggests a 125A extension lead to be used with the 72kW version - so that stacks up as well.

       - Andy.

Children
  • 0 in reply to AJJewsbury

    I agree with Andy. The instruction manual suggests that a further 4.5 kW are required for the fan. It also states a "rated current" of 110 A. I agree that 35 mm² cable would be required.

    The 36 kW model has a rated current of 57 A.

    I find it a little odd that the heating capacity is given for a certain floor area when surely, the volume of the space would seem to be more appropriate.

Community Rules & Guidelines