Thytronic NG10 - Measures Residual Overcurrent 50 N;51 N - Extremely Inverse Time Curve (IEC 60255-3;BS142 Type C)

APPENDIX
122
NG10 - Manual - 04 - 2022
 Measures residual overcurrent 50N/51N - Extremely inverse time curve (IEC 60255-3/BS142 type C)
F_5112-IECC-Char.ai
1.1
21 3 4 5 6 7 8 9 10 20
I
E
/I
E
>
inv
0.01
0.1
1
10
100
1000
10000
100000
t [s]
t
E
>
inv
= 10 s
t
E
>
inv
= 60 s
t
E
>
inv
= 5 s
t
E
>
inv
= 1 s
t
E(x)
>
inv
= 0.5 st
E(x)
>
inv
= 0.2 s
t
E(x)
>
inv
= 0.02 s
t
E(x)
>
inv
= 0.1 s
t = t
E
>
inv
·
[(I
E
/I
E
>
inv
)
2
-1]
80
Note: match of operating and setting time takes occurs when I
E
/I
E
>
inv
= 9