Thytronic Pro-N NVA100X-D - Residual overcurrent 50 N.1;51 N.1, 50 N.2;51 N.2 and 50 N(Comp);51 N(Comp) - Electromechanical inverse curves (EM)

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NVA100X-D - Manual - 02 - 2016
APPENDIX
Residual overcurrent 50N.1/51N.1, 50N.2/51N.2 and 50N(Comp)/51N(Comp) - Electromechanical inverse curves (EM)—
F_51N-EM-Char.ai
1.1
2 345678910 20
I
E
/I
E
>inv
0.01
0.1
1
10
100
1000
10000
t [s]
60 s
10 s
5 s
1 s
0.5 s
0.2 s
0.1 s
0.02 s
Note: match of operating and setting time takes place when I
E
/I
E
>
inv
or I
EC
/I
EC
>
inv
= 4
t =
t
E
>
inv
·
[-0.236
·
(I
E
/I
E
>
inv
)
-1
+ 0.339]
0.28
I
EC
/I
EC
>inv
t
E>inv
t
EC>inv
t =
t
EC
>
inv
·
[-0.236
·
(I
EC
/I
EC
>
inv
)
-1
+ 0.339]
0.28