Thytronic Pro-N NVA100X-D - 46 M - First element - Extremely inverse time curve (IEC 60255-3;BS142 type C)

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NVA100X-D - Manual - 02 - 2016
APPENDIX
46M - First element - Extremely inverse time curve (IEC 60255-3/BS142 type C)—
F_46M-IECC-Char.ai
1.1
2 3 4 5 6 7 8 9 10 20
I
2
/I
2
>inv
0.01
0.1
1
10
100
1000
10000
100000
t [s]
10 s
60 s
t
2
>
inv
5 s
1 s
t
2
>
inv
= 0.5 st
2
>
inv
= 0.2 st
2
>
inv
= 0.02 s t
2
>
inv
= 0.1 s
t =
t>
inv
·
[(I/I>
inv
)
2
-1]
80
Note: match of operating and setting time takes place when I
2
/I
2
>
inv
= 9