Current De-Rating Depending On The Pulse Frequency - Siemens SINAMICS S120 Manual

2.10.4

Current de-rating depending on the 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 data for Motor Modules.
Table 2- 3 Derating factor of the output current as a function of the pulse frequency for devices with a rated pulse fre-
quency of 2 kHz
Article No. Type rating
6SL3725-... [kW]
1TE41-4AS3 800
Table 2- 4 Derating factor of the output current as a function of the pulse frequency for devices with a rated pulse fre-
quency of 1.25 kHz
Article No. Type rating
6SL3725-... [kW]
1TE36-1AA3 315
1TE37-5AA3 400
1TE38-4AA3 450
1TE41-0AA3 560
1TE41-2AA3 710
1TE41-4AA3 800
1TG34-7AA3 450
1TG35-8AA3 560
1TG37-4AA3 710
1TG38-0AA3 800
1TG38-1AA3 800
1TG41-0AA3 1000
1TG41-3AA3 1200
1TG41-6AA3 1500
Device 6SL3725-1TG38-0AA3 is optimized for low overload, with increased pulse frequency, the derating factor is
1)
higher than for the device with article number 6SL3725-1TG38-1AA3.
Cabinet Modules liquid cooled
Manual, 10/2015, A5E37067587A
Output current
at 2 kHz
[A]
Supply voltage 510 – 720 VDC
1330
Output current
at 1.25 kHz
[A]
Supply voltage 510 – 720 VDC
605
745
840
985
1260
1405
Supply voltage 675 – 1035 VDC
465
575
735
810
1)
810
1025
1270
1560
Derating factor at the pulse frequency
2.5 kHz 4 kHz
88 % 55 %
Derating factor at the pulse frequency
2 kHz 2.5 kHz
83 % 72 %
83 % 72 %
87 % 79 %
92 % 87 %
92 % 87 %
97 % 95 %
92% 87%
91 % 85 %
84 % 74 %
82% 71%
97 % 95 %
91 % 86 %
87 % 79 %
87 % 79 %
System overview
2.10 Derating data
5 kHz 7.5 kHz
-- --
4 kHz 5 kHz
64 % 60 %
64 % 60 %
64 % 55 %
70 % 60 %
70 % 60 %
74 % 60 %
67% 55 %
64 % 50 %
53 % 40 %
52% 40 %
71 % 55 %
64 % 50 %
55 % 40 %
55 % 40 %
8 kHz
--
7.5 kHz
40 %
40 %
40 %
50 %
50 %
50 %
35%
35 %
25 %
25 %
35 %
30 %
25 %
25 %
41