Thytronic Pro-N NVA100X-D - Page 184

184
NVA100X-D - Manual - 02 - 2016
FUNCTION CHARACTERISTICS
F_59N-Char.ai
1.1
234
t
UE
>= 100 s
t
UE
>= 10 s
t
UE
>= 1 s
t
UE
>= 0.1 s
1.5
0.01
0.1
1
10
100
1000
10000
t [s]
t =
t
UE>inv
·
[(U
E
/U
E>inv
) - 1]
0.5
t =
t
UE>inv
·
[(U
EC
/U
E>inv
) - 1]
0.5
U
E
/U
E>inv
U
EC
/U
E>inv
Inverse time operating characteristic concerning the first threshold (UE>) of the residual overvoltage element - 59N
Note: match of operating and setting time takes place when U
E
/U
E>inv
= 1.5 or U
EC
/U
E>inv
= 1.5