APPENDIX
182
NA30 - Manual - 04 - 2022
Phase overcurrent 50/51 - Rectifier curves
F_51-RI-Char.ai
0.01
0.1
1
100
10
1000
10 000
100 000
1000 000
t
[s]
1.1
2
3
4
5
6 7 8 9 10
20
I
/
I
>inv
t
>
inv
= 60 s
t
>
inv
= 10 s
t
>
inv
= 5 s
t
>
inv
= 1 s
t
>
inv
= 0.1 s
t
>
inv
= 0.5 s
t
>
inv
= 0.02 s
t
>
inv
= 0.1 s
t
=
t
>
inv
·
[(
I
/
I
>
inv
)
5.6
-1]
2351
Note: match of operating and setting time takes place when I/I>
inv
= 4
