Siemens 6SR41 series - Figure 5-17 Indicators and Labels; Table 5- 11 Geniv Cell Current De-Rate Factors 1*, 2

Product Description
5.3 Cabinet Details
Product User Manual
78 Operating Instructions, Version AE 12/2009, A5E01454341C
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Figure 5-17 Indicators and Labels
WARNING
The power cells include discharge resistors to dissipate stored energy after the input
voltage is removed. The power cell DC bus voltage decays to less than 50 VDC in less than
10 minutes.
Cell De-rating
In some cases, a cell’s continuous output current rating is de-rated due to site conditions and
abnormal applications. (Refer to Table "GenIV Cell Current De-Rate Factors 1*, 2*".)
Table 5- 11 GenIV Cell Current De-Rate Factors 1*, 2*
1. Power Cell initial sizing is based upon the motor parameters, (including motor
service factor):
I
MTR
= Hp * SF * 746 / (V
MTR
* 1.732 * PF * EFF)
2. If motor nameplate frequency exceeds 167 Hz, the F
CAR
= 3.6 * F
OUT
[Hz], and
when F
CAR
exceeds 600 Hz de-rate cell current as:
I
BASE 1
= (1-[(F
CAR
-600)/600]*0.2)