The task of limiting controls is to maintain the system characteristics within justifiable limits in the event of unforeseeable or extreme disturbing influences which may lead to anomalous operating states.
VDI/VDE 3500-1996 history
1996VDI/VDE 3500-1996 Limiting controls in fossil fired steam power stations
1995VDI/VDE 3500-1995 Begrenzungsregelungen in konventionellen Dampfkraftwerken