Technical data

MKE UL/CSA Electrical connections 11-5
DOK-MOTOR*-MKE*UL/CSA*-PR01-EN-P
11.3 Power cable dimensions
The cable cross-section calculations provided in the Rexroth Indramat
documentation are based on effective currents and the assumption of a
“turning motor”. The basis for the calculation are the continuous stall
currents as provided in the Technical Data; these are given as peak
values.
The relevant currents have the following relationship:
2
)(
)(
MotordN
cable
I
I =
I
(cable)
: current relevant for setting cable dimensions
I
dN(Motor)
: continuous stall current for motor (peak value)
Fig. 11-5: Effective and peak values (“turning motor”)
In general, dimensioning according to the effective current with a “turning
motor” is sufficient.
)()( MotordNcable
II =
I
(cable)
: current relevant for setting cable dimensions
I
dN(Motor)
: continuous stall current for motor (peak value)
Fig. 11-6: Effective and peak values (“standing motor”)
In certain application cases that require a continuous stall torque at a
speed of = 0 rpm from the motor over long periods of time (for guidelines,
see Fig. 11-7), it is recommended that the cable dimensions be set
according to the peak values (“standing motor”) in the Technical Data.
Motor type Time interval
MKE 037 10 min
MKE 047, 098 15 min
Fig. 11-7: Time intervals
Note: The recommended minimum cross-sections provided must be
checked by the machine/system manufacturer for the
machine/system-specific conditions and, if necessary,
corrected.
“Turning motor”
“Standing motor”