SIEMENS
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Siemens D 35 · 2017
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Characteristic curves
(continued)
5
SINAMICS G120P Cabinet, converter cabinet units
SINAMICS G120P Cabinet, 75 kW to 630 kW
SINAMICS G120P Cabinet
Overload capability
SINAMICS
G120P Cabinet converter cabinet units are equipped
with an overload reserve to deal with breakaway torques, for ex-
ample. If larger surge loads occur, this must be taken into ac-
count when configuring. In drives with overload requirements,
the appropriate base-load current must, therefore, be used as a
basis for the required load.
The unit can operate in two different duty cycles in the permissi-
ble continuous operating range shown in the diagram (green
area). Depending on how the system is dimensioned, the rele-
vant base-load current is effective as a rated quantity.
The criterion for overload is that the converter is operated with its
base-load current before and after the overload occurs on the
basis of a duty cycle duration of 300 s.
The base-load current for a low overload
I
L
is the basis for a duty
cycle of 135 % for 3 s or 110 % for 60 s.
The base-load current
I
H
for a high overload is based on a duty
cycle of 150 % for 60 s.
Overload capability, low overload for SINAMICS G120P Cabinet from
160 kW (215 hp)
Overload capability, high overload
110 % overload for 60 s
135 % overload for 3 s
Base-load current
t
s
G_D011_EN_00403a
L
%
300
240
180
120
0
100
110
135
60
150 % overload for 60 s
Base-load current
H
t
s
G_D011_EN_00404
I
%
I
300
240
180
120
0
100
150
60
© Siemens AG 2017