Dc Supply - KEB COMBIVERT F5 Betriebsanleitung

1.4

DC Supply

The DC input current of the inverter is basically determined by the used motor.
The data can be taken from the motor name plate.
400V Class:
√3 x rated motor voltage x rated motor current x motor cos ϕ
The DC input peak current is determined by the operating range.
• if you accelerate on the hardware current limit, the short-time current limit of
the inverter must be used in the formula above (instead of the rated motor
current.
• if the motor in normal operation is never stressed with rated torque, it can be
calculated with the real motor current.
• a good practice value corresponds approx. to 1,5-times of the rated motor
current (from 90kW 1,25-times)
540V
9