Input Cable to the VFD
Input Cable to the VFD
(OP)
Is it correct to consider the current rating of the VFD for cable sizing x 125% instead of using the VFD motor FLA? We have a 4160V system feeding a 4160V VFD connected to a 4kV motor. From there we calculate the voltage drop and S.C withstand, are there any other factors to re-consider for VFD input cable sizing






RE: Input Cable to the VFD
RE: Input Cable to the VFD
RE: Input Cable to the VFD
RE: Input Cable to the VFD
The input current is basically the motor current divided by the efficiency so if you're not sure then estimate the VFD current as something like 10% higher.