Siemens 7SJ85 - Process Monitor; Overview of Functions; Structure of the Function

Process Monitor
Overview of Functions
All function groups that have functions with dependencies on the state of the protected object contain a
process monitor. The process monitor detects the current state of the protected object.
Structure of the Function
The Process monitor function is used in the Standard V/I 3-phase protection function group.
The Process monitor function is provided by the manufacturer with the following function blocks:
•
Cold-load pickup detection (optional)
•
Current-flow criterion
•
Circuit-breaker condition
•
Closure detection
[dwpro3pt-061212-01.tif, 2, en_US]
Figure 5-89 Structure/Embedding of the Function
You can activate the cold-load pickup detection as needed. All other stages of the process monitor run perma-
nently in the background and are not displayed in DIGSI.
The following figure shows the relationships of the individual function blocks.
5.8
5.8.1
5.8.2
Function-Group Types
5.8 Process Monitor
294 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017