Thytronic NG10 - Measured Residual Overcurrent 50 N;51 N - Extremely Inverse Time Curve (ANSI;IEEE Type EI)

APPENDIX
126
NG10 - Manual - 04 - 2022
 Measured residual overcurrent 50N/51N - Extremely inverse time curve (ANSI/IEEE type EI)
F_51N-ANSIEI-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
t [s]
t
E
>
inv
= 10 s
t
E
>
inv
= 60 s
t
E
>
inv
= 5 s
t
E
(x)
>
inv
= 0.5 s
t
E
(x)
>
inv
= 1 s
t
E
(x)
>
inv
= 0.2 s
t
E
(x)
>
inv
= 0.1 s
t
E
(x)
>
inv
= 0.02 s
t =
t
E
>
inv
·
[(I
E
/I
E
>
inv
)
2
-1]
5.64
+ 0.024
ote: match of operating and setting time takes occurs when I
E
/I
E
>
inv
= 2.789