230
FUNCTION CHARACTERISTICS
F_59N-Char.ai
1.1
2
3
4
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
XMR-D EQUIPMENT MANUAL
Ed. 2.9 - 02/2021
