Thytronic NC20 - Page 109

109
NC2 0 - Manual - 01 - 2015
FUNCTION CHARACTERISTICS
F_59-Char.ai
1.1
234
U /U >inv
t
U
>
inv
= 100 s
t
U
>
inv
= 10 s
t
U
>
inv
= 1 s
t
U
>
inv
= 0.1 s
1.5
0.01
0.1
1
10
100
1000
10000
t [s]
Inverse time operating characteristic concerning the first threshold (U>) of the overvoltage element - 59
t =
t
U
>inv
·
[(U/U>
inv
) - 1]
0.5
Note: match of operating and setting time takes place when U/U>
inv
= 1.5