MF
MF
OUTGOING
INCOMING
PH3LPTOC
PH3HPTOC
PH3IPTOC
CCBRBRF
INRPHAR
PH3LPTOC
PH3HPTOC
PH3IPTOC
CCBRBRF
MF
OUTGOING
INRPHAR
Line type 2
Line type 1
I
k
max
I
k
min
I
k
max
I
k
min
I
k
max
I
k
min
9
8
7
GUID-0A032F35-2E27-4AAE-B698-D33E1893B3EA V1 EN
Figure 82: Functionality of numerical multiple-stage overcurrent protection
The coordination plan is an effective tool to study the operation of time-selective
operation characteristics. All the points mentioned earlier, required to define the
overcurrent protection parameters, can be expressed simultaneously in a
coordination plan. In Figure 75, the coordination plan shows an example of
operation characteristics in the LV-side incoming feeder and radial outgoing feeder.
Section 4 1YHT530004D05 D
Protection functions
170 615 series
Technical Manual
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