FANOX SIL B, Руководство пользователя

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If overcurrent fault is 15xI
n
=1500 Ap, Definite time curve defines a tripping value of 5 s (Figure 5)
for 51 function. It is considered that this time is too high, so when current fault reaches 15xI
n
,
definite time overcurrent function will be work function 50).
The figure below (Figure 6), shows the tripping curve of the relay:
Figure 6. Relay tripping curve
15; 1
0
1
2
3
4
5
6
0 10 20 30 40 50 60
t
(s
)
I
Function 51 as function 50
Function 50