Siemens 7SJ85 - Function-Group Type Capacitor Bank Differential Protection; Function-Group Types

Function-Group Type Capacitor Bank Differential Protection
Function-Group Types
In the following graphic, you can see the structural association of the function-group types to the Capacitor
bank differential protection.
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Figure 5-24 Function-Group Types Capacitor Bank Diff
The following function-group types are summarized in the Global DIGSI 5 library: Motor diff
•
Capacitor bank diff
•
Capacitor bank side
You can find the description of the function groupCapacitor bank in chapter 5.4.1 Overview.
The individual function-group types are stored in the Capacitor bank diff function group folder and can be
selected. In the protection function folders, you find all protection functions which are operational in each
function group. A Capacitor bank diff function group always includes the Capacitor bank and Capacitor
bank side function groups. In total, you can assign a maximum of 3 function groups Capacitor bank or
Capacitor bank side to the Capacitor bank diff function group.
The following table shows you the number of function-group types that can be instantiated for device 7SJ85.
Table 5-7
Function-Group Types in the Device
Device
Function-Group Type
Capacitor Bank Diff Capacitor Bank Capacitor Bank Side
7SJ85 Max. 2 Max. 9 Max. 9
Interconnection of the function groups is necessary so that the capacitor bank differential protection functions
properly. The Circuit-breaker function group is not listed.
Table 5-8
Assignment of Protection Function Groups to Protection Function Groups
Capacitor Bank Diff 1
Side
(2 to 3)
Capacitor bank X
Capacitor bank side 1 X
5.5
5.5.1
Function-Group Types
5.5 Function-Group Type Capacitor Bank Differential Protection
224 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017