No. Information Data Class
(Type)
Type
_:307 Brk.wire det.:Broken wire suspected SPS O
_:308 Brk.wire det.:Broken wire confirmed SPS O
Current-Balance Supervision
Overview of Functions
In healthy network operation, a certain balance between currents can be assumed.
The Current-balance supervision function detects the following errors:
•
Unbalance of phase currents in the secondary circuit
•
Connection errors during commissioning or short circuits and interruptions in the secondary circuit
The current measurement is based on the RMS values of the fundamental component.
Structure of the Function
The Current-balance supervision function is located in the Power-system data of each 3-phase current
measuring point.
[dwstrsym-060611-01.tif, 2, en_US]
Figure 8-15 Structure/Embedding of the Function
Function Description
The current balance is checked by a magnitude monitoring function. This function relates the smallest phase
current to the largest phase current. Unbalance is detected if
|Imin| / |Imax| < Threshold min/max, as long as Imax > Release threshold.
[losymmke-040211-01.tif, 1, en_US]
Figure 8-16 Characteristic of the Current-Balance Supervision
8.3.6
8.3.6.1
8.3.6.2
8.3.6.3
Supervision Functions
8.3 Supervision of the Secondary System
384 SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017
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