Technical Data
Instruction handbook b maXX BM5500, BM5600, BM5700
Document No.: 5.13008.10
119
of 314
3
3.7 Output frequency dependent continuous current derating BM5XXX
The specified rated currents of all Baumüller devices are permitted continuously. The
electrical output frequency in S1 operation is permitted from 15 Hz onwards. The contin-
uously permitted output current must be reduced complying with the following character-
istic curve if the statical output frequency is lower than 15 Hz and the frequency remains
between 0 and 15 Hz for more than 5 seconds.
Examples:
n Spe
ed control operations without positioning.
n Stands
till operations if current is required to keep a torque / a force.
n At
operations if it is likely that the mechanics block, for example when starting cold ex-
truders.
The following operations are not affected:
n Typical po
sitioning operations.
n Operating motors,
which use an operating brake at standstill.
n Operations
, where the higher-level control has a standstill and block monitoring.
I
Rating
The use of I
Rating
is permitted, as long as the derating range is passed through quickly
enough. The frequency change must be 15 Hz/s.
Derating of the motor-sided output current I of the inverter against the rated output current
I
Rating
dependent on the static output frequency f of the inverter.
Statical output frequency of inverter f
Figure 55: Derating at a statical inverter frequency < 15 Hz
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