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Short time withstand current- more than one trafo

Short time withstand current- more than one trafo

Short time withstand current- more than one trafo

(OP)
Hi

Does anyone know what is the short time withstand current of the bars fed by 2, 3, or 4 transformers, let's say 630 KVA Uk=6%?
If the Icw(1 sec)= 15 KA for bars fed by 1 transformer, for 2 transformers Icw(1 sec)= 2x15KA , for 3 transformers is 3x 15=45 KA?
Is this the rule?
Thanks.

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