Cell Current Overload - Siemens 6SR41 series Product User Manual

6.7.6

Cell Current Overload

The NXG Control provides a power cell (current) overload setting. A cell can operate at this
overload value for 1 minute out of every 10 minutes. When the current is between the cell
rating and the overload rating, the time spent at that level is inversely proportional to the
overload current setting. The following Table provides an example of the time versus current
overload capability with a cell that has 120% overload capacity.
Table 6- 3
Drive current (%)
120
110
105
100
Note
The power cells used in Harmony drives do not have a fixed overload capability. Please refer
to the cell's overload rating as shown in Chapter GenIV Specifications"" of this document to
determine the overload capability for a specific power cell.
Product User Manual
Operating Instructions, Version AE 12/2009, A5E01454341C
Example of Overload Current Capability versus Time of Cell with 120% Overload
Allowed operating time (out of every 10 minutes)
1 minute
2 minutes
4 minutes
Continuous
Application and Operation
6.7 Drive Output Torque Limiting
127