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

Product Description
5.3 Cabinet Details
Figure 5-17 Indicators and Labels
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
1.
2.
78
WARNING
GenIV Cell Current De-Rate Factors 1*, 2*
Power Cell initial sizing is based upon the motor parameters, (including motor
service factor):
I = Hp * SF * 746 / (V
MTR
If motor nameplate frequency exceeds 167 Hz, the F
when F exceeds 600 Hz de-rate cell current as:
CAR
I = (1-[(F
BASE 1 CAR
* 1.732 * PF * EFF)
MTR
-600)/600]*0.2)
Operating Instructions, Version AE 12/2009, A5E01454341C
= 3.6 * F [Hz], and
CAR OUT
Product User Manual