Dc Supply; Calculation Of The Dc Input Current; Internal Input Circuit - KEB COMBIVERT F5 Series Instruction Manual

No braking resistor may be connected for control type "Basic" at an input rated vol-
tage of 480 Vac. The response threshold of the braking transistor (Pn.69) for all other
controls without safety technology (A, E, G, H, M) must be adjusted at least to 770 Vdc
(see annex D).
2.4

DC supply

2.4.1

Calculation of the DC input current

The DC input current of the inverter is basically determined by the used motor. The data can
be taken from the motor name plate.
230V class:
I = ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
DC
400V class:
I =
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
DC
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 inver-
ter 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.
2.4.2

Internal input circuit

The COMBIVERT F5/F6 in H housing corresponds to the inverter type A1. Pay attention to
the inverter type in DC interconnection and in operation at regenerative unit.
Inverter type for COMBIVERT F5/F6 in H housing: A1
Technical Data of the 400 V Class
√3 • rated motor voltage • rated motor current • Motor cos φ
√3 • rated motor voltage • rated motor current • Motor cos φ
L1
L2
L3
DC voltage (310 V)
DC voltage (540 V)
++
+
--
GB - 15