![Thytronic Pro-N NVA100X-D Скачать руководство пользователя страница 356](http://html1.mh-extra.com/html/thytronic/pro-n-nva100x-d/pro-n-nva100x-d_manual_1113999356.webp)
356
NVA100X-D - Manual - 02 - 2016
APPENDIX
Directional ground overcurrent 67N(Comp) - Extremely inverse time curve (ANSI/IEEE type EI)
—
F_67N(Comp)-ANSIEI-Char.ai
1.1
2
3
4
5
6
7
8 9 10
20
I
PD
/
I
PD
>inv
I
PD
/
I
PD
>>inv
0.01
0.1
1
10
100
1000
10000
t
[s]
10 s
60 s
5 s
0.5 s
1 s
0.2 s
0.1 s
0.02 s
Note: match of operating and setting time takes place when I
EDH
/I
EDC
>
inv
or I
EDL
/I
EDC
>
inv
= 2.789
t
=
t
EDC
>
inv
·
[(
I
EDH
/
I
EDC
>
inv
)
2
-1]
5.64
+ 0.024
t
=
t
EDC
>
inv
t
EDC
>
inv
·
[(
I
EDL
/
I
EDC
>
inv
)
2
-1]
5.64
+ 0.024