Current Derating As A Function Of Pulse Frequency - Siemens SINAMICS S120 Equipment Manual

5.6.2.4

Current derating as a function of pulse frequency

When the pulse frequency is increased, the derating factor of the output current must be
taken into account.
This derating factor must be applied to the currents specified in the technical specifications in
Table 5-7 and Table 5-8.
Table 5-9
Order no.
6SL3325-...
1TE33-1AA0
1TE35-0AA0
Table 5-10
Order no.
6SL3325-...
1TG35-8AA0
1TG38-1AA0
1TG41-0AA0
1TG41-3AA0
Note
For pulse frequencies in the range between the specified fixed values, the relevant derating
factors can be determined by linear interpolation.
Maximum output frequencies achieved by increasing the pulse frequency
By multiplying the rated pulse frequency with a multiple integer, the following output
frequencies can be achieved taking into account the derating factors in Table 5-9 and
Table 5-10:
Table 5-11
Due to the closed-loop control, the maximum output frequency is limited to 300 Hz.
1)
Chassis Power Units Liquid Cooled
SINAMICS S120 Equipment Manual, Edition 04/2007, 6SL3097-2AM00-0BP2
Derating factor of the output current as a function of the pulse frequency for devices with
a rated pulse frequency of 2 kHz
Power
[kW]
160
250
Derating factor of the output current as a function of the pulse frequency for devices with
a rated pulse frequency of 1.25 kHz
Power
[kW]
560
800
1000
1200
Maximum output frequencies achieved by increasing the pulse frequency
Pulse frequency
[kHz]
1.25
2
2.5
4
5
Output current at
pulse frequency of
2 kHz [A]
Connection voltage 510 – 720 V DC
310
490
Output current at
pulse frequency of
1.25 kHz [A]
Connection voltage 675 – 1080 V DC
575
810
1025
1270
Maximum output frequency
[Hz]
100
160
200
300
1)
300
1)
5.6 Technical specifications
Derating factor at Derating factor at
pulse frequency of pulse frequency of
4 kHz
88 %
78 %
Derating factor at Derating factor at
pulse frequency of pulse frequency of
2.5 kHz
85 %
95 %
86 %
79 %
Motor Modules
8 kHz
50 %
50 %
5 kHz
50 %
55 %
50 %
40 %
5-19