Siemens 7SJ85 - Application and Setting Notes

Logic
[lojumpii-271011-01.tif, 1, en_US]
Figure 6-331
Current-Jump Detection Logic
Application and Setting Notes
Parameter: Measured value
•
Default setting (_:9) Measured value = phase currents
With the parameter Measured value, you set whether the line current(s) or the residual current is to be
used for jump detection.
Parameter Value
Description
phase currents
The tripping stage evaluates the line currents IL1, IL2
and IL3 phase-selectively to detect a jump.
zero-sequence current
The tripping stage evaluates the residual current
IN/3I0 to detect a jump.
Parameter: Threshold
•
Default setting (_:101) Threshold = 0.10 A for I
rated
= 1A or 0.50 A for I
rated
= 5 A
With the parameter Threshold, you set the threshold value for the measurand which, when exceeded,
generates the output indication Jump .
6.49.4
Protection and Automation Functions
6.49 Current-Jump Detection
958 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017