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 6 replies
  • Subscribers 31 subscribers
  • Views 1179 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

1 MVA Tx cables

Frankie 223

Hello,

On a project were a 1 MVA transformer is being installed, the cables from the transformer to the main LV panel are sized as 4x4x1C 240mm2 + 2x1C 240mm2 cpc.

UKPN advised that the transformer is only capable of receiving maximum 2x300mm2 single cables per phase.

Has anyone faced a similar situation?

Based on preliminary calculations it seems that the 2x300 per phase are not enough.

Your thoughts on this would be welcomed.

Parents
  • 0
    Alan,


    How do you confirm the current carrying capacity of the cabling in that case.


    BS 7671 Table 4D3A (Run to 70) states an optimum CCC for a 300mm2 as 567A in trefoil, therefore 1134A in parallel 2DE.


    This is far below 1443A required


    Thanks in advance
Reply
  • 0
    Alan,


    How do you confirm the current carrying capacity of the cabling in that case.


    BS 7671 Table 4D3A (Run to 70) states an optimum CCC for a 300mm2 as 567A in trefoil, therefore 1134A in parallel 2DE.


    This is far below 1443A required


    Thanks in advance
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