I have 3 motors each 400 KW, 660V , I did the following calculations, so please correct me if I am wrong
FLC for each motor = (400*1000)/(1.732*660*0.8)= 437 A
Conductor size = 1.25 * 437 =546 A , the conductor size 3 x 1C x 500 mm2 (1000 AWG/Kcmil) , the cable length about 50m
The motor C.B : 630 A
The main C.B for the panel controlled the 3 branch motors = (630 * 1.25) + (437+437)=1661 A , so we can use 1600A
The size of the required transformer (1.2 (3 * 400 KW))=1440 KW = 1800 KVA it mean 2000 KVA transformer
Please advice if something wrong
FLC for each motor = (400*1000)/(1.732*660*0.8)= 437 A
Conductor size = 1.25 * 437 =546 A , the conductor size 3 x 1C x 500 mm2 (1000 AWG/Kcmil) , the cable length about 50m
The motor C.B : 630 A
The main C.B for the panel controlled the 3 branch motors = (630 * 1.25) + (437+437)=1661 A , so we can use 1600A
The size of the required transformer (1.2 (3 * 400 KW))=1440 KW = 1800 KVA it mean 2000 KVA transformer
Please advice if something wrong