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

6.2.8.3

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 Chassis-2.
Table 6- 39 Derating factor of the output current as a function of the pulse frequency for devices with a rated pulse fre-
quency of 2.5 kHz
Article No. Type rating
6SL3321-... [kW]
1TE36-6AA0
1TE37-4AA0
1TE38-1AA0
1TE38-8AA0
1TE41-0AA0
1TE41-1AA0
1TE41-2AA0
1TE41-3AA0
1TE41-5AA0
Note
Derating factors for pulse frequencies in the range between two fixed values
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
The adjustable pulse frequencies - and therefore the output frequencies that can be achieved
with the factory-set current controller clock cycles - are listed below.
Table 6- 40 Maximum output frequencies achieved by increasing the pulse frequency
Current controller
clock cycle
T
I
400 µs
With the "High output frequencies" license, which can be ordered as option J01 on the CompactFlash card for SINAMICS
1)
S120, the maximum output frequency is increased up to 650 Hz.
Refer to the Low Voltage Configuration Manual for current controller clock cycles deviating
from the factory setting.
Air-cooled chassis power units
Equipment Manual, 06/2020, 6SL3097-5AE00-0BP3
Output current
at 2.5 kHz
[A]
Connection voltage 510 ... 720 V DC (line voltage 3 AC 380 ... 480 V)
315 655
355 740
400 810
450 910
500 975
560 1075
630 1200
710 1325
800 1495
Adjustable pulse
frequencies
f
p
2.50 kHz
5.00 kHz
7.50 kHz
Derating factor at the pulse frequency
4 kHz
78 %
78 %
78 %
78 %
78 %
78 %
78 %
78 %
75 %
Maximum achievable output frequency f
V/f operating mode
208 Hz
416 Hz
550 Hz
1)
6.2 Motor Modules Chassis-2
5 kHz 7.5 kHz
67 % 48 %
67 % 48 %
67 % 48 %
67 % 48 %
67 % 48 %
67 % 48 %
67 % 48 %
67 % 48 %
62 % 39%
Vector operating
mode
208 Hz
300 Hz
300 Hz
Motor Modules
8 kHz
45 %
45 %
45 %
45 %
45 %
45 %
45 %
45 %
36 %
A
Servo mode
-
-
-
325