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Transformer Tails Sizing

fiftyhertz
Hi All,


I am trying to nail down sizing the tails from the TX into a switchpanel.


I have reviewed the the information in GN1 and understand the methods of installing to get the best current sharing capabilities. 


The issue is getting reasonbly sized AWA singles.


Example: 1500KVA TX - FLC 2165A.


Using Table 4D3 (to run to 70C) I cannot even get Trefoil 3 sets of 4 x 630mm2 (809A) cables to work, due to a grouping factor of 0.54?


How is the dealt with practically?
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  • 0
    What terminations does your 2kA ACB have? What is the length of these cables? Have you thought of using Copper cables? How much space do you have at the Transformer terminals? There is a faulty assumption here somewhere!
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  • 0
    What terminations does your 2kA ACB have? What is the length of these cables? Have you thought of using Copper cables? How much space do you have at the Transformer terminals? There is a faulty assumption here somewhere!
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