Siemens SINAMICS G130 Engineering Manual page 304
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- List manual (1976 pages) ,
- Operating instructions manual (610 pages) ,
- Engineering manual (530 pages)
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SINAMICS S150
Engineering Information
Overload and overtemperature protection
SINAMICS S150 cabinets are equipped with effective overload and overtemperature protection mechanisms which
protect them against thermal overloading.
Sensors at various locations in the converter (inlet air, control electronics, rectifier heatsink, inverter heatsink)
measure the relevant temperatures and feed them into the so-called "Thermal model". This continuously calculates
the temperature at critical positions on power components. In this way the converter is effectively protected against
thermal overloads, whether they are caused by excessive current or high ambient temperatures. The so-called "I
monitoring circuit checks the level of utilization of the motor-side inverter. If the level of inverter utilization or the
temperature at any point in the converter exceeds the upper tolerance limit, the converter responds by initiating an
overload reaction parameterized in the firmware. It is possible to select whether the converter should react to
overload by reducing the output frequency and output current or the pulse frequency. Immediate shutdown can also
be parameterized.
Maximum output frequencies
The maximum output frequency for SINAMICS S150 cabinets is limited to either 160 Hz or 100 Hz due to the factory-
set pulse frequency of either f
through an increase in the pulse frequency. As the switching losses in the motor-end IGBT inverter increase in
proportion to the pulse frequency, the output current must be reduced accordingly.
Permissible output current and maximum output frequency as a function of pulse frequency
Output power
Rated output current
at
400 V / 690 V
pulse frequency of
2 kHz
380 V – 480 V 3AC
110 kW
210 A
132 kW
260 A
160 kW
310 A
200 kW
380 A
250 kW
490 A
315 kW
-
400 kW
-
450 kW
-
560 kW
-
710 kW
-
800 kW
-
500 V – 690 V 3AC
75 kW
-
90 kW
-
110 kW
-
132 kW
-
160 kW
-
200 kW
-
250 kW
-
315 kW
-
400 kW
-
450 kW
-
560 kW
-
710 kW
-
800 kW
-
900 kW
-
1000 kW
-
1200 kW
-
SINAMICS S150: Permissible output current as a function of pulse frequency
SINAMICS Engineering Manual – May 2008
304/396
© Siemens AG
= 2.00 kHz or f
pulse
pulse
Current derating-faktor
at
at
pulse frequency of
1,25 kHz
4 kHz
-
82 %
-
83 %
-
88 %
-
87 %
-
78 %
605 A
-
745 A
-
840 A
-
985 A
-
1260 A
-
1405 A
-
85 A
-
100 A
-
120 A
-
150 A
-
175 A
-
215 A
-
260 A
-
330 A
-
410 A
-
465 A
-
575 A
-
735 A
-
810 A
-
910 A
-
1025 A
-
1270 A
-
= 1.25 kHz. Higher output frequencies can be obtained only
2,5 kHz
-
-
-
-
-
72 %
72 %
79 %
87 %
87 %
95 %
89 %
88 %
88 %
84 %
87 %
87 %
88 %
82 %
82 %
87 %
85 %
79 %
95 %
87 %
86 %
79 %
2
t"
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