Functions
2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection)
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A4, Release date 08.2010
137
Figure 2-41 Logic diagram of the load jam protection
2.7.3.2 Setting Notes
Elements
A warning and a tripping element can be configured. The threshold value of the tripping element 4402 Load
Jam I> is usually configured below motor startup at double motor ampere rating. Warning element 4404 I
Alarm is naturally set below the tripping element, to approx. 75% of the tripping element, with a longer delay
time (parameter 4405 ALARM DELAY). If the warning element is not required, the pickup value can be set to
its maximum value and the respective message from the buffers can be removed.
To Next Page
Loading...
Need help?
General
