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I
L1
I
L2
I
L3
L1
L2
L3
2650 3I0p PICKUP
I
E
E
7106 >BLOCK O/C Ip
7110 >O/C InstTRIP
T
0
switch onto
fault
2680 SOTF Time DELAY
further
stages
Figure 6-92
Logic diagram of the I
7SA6 Manual
C53000-G1176-C156-2
2640 IP
&
I
P
&
3I
0P
2670
I(3I0)p Tele/BI
Yes
≥1
No
Yes
No
I(3I0)p SOTF
2671
–stage (inverse time overcurrent protection IDMT) — illustration for IEC–curves
p
2660 IEC Curve
2642 T Ip Time Dial
t
T
0
I
2646 T Ip Add.
&
2652 T 3I0p Time Dial
t
T
0
I
2656 T 3I0p Add.
&
Functions
Ip Pickup L1
Ip Pickup L2
Ip Pickup L3
≥1
Ip Trip L1
Ip Trip L2
Ip Trip L3
3I0p Pickup
≥1
3I0p Trip
6-165
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