Seg WI Series - Inverse-Time Characteristics (I>, I>>, I>>>)

11.2.1.2 Inverse-Time Characteristics (I>, I>>, I>>>)
Characteris‐
tic
»Char«
Trip Delay Reset Delay
(only for »Reset Mode« =
“inverse time”)
t =
⎛
⎝
⎜
k
⎛
⎝
I
I>
⎞
⎠
α
-1
+ c
⎞
⎠
⎟
⋅ tChar
t =
τ
1 -
⎛
⎝
I
I>
⎞
⎠
α
⋅ tChar
k
[s]
c
[s]
α τ
[s]
α
IEC NINV 0.14 0 0.02 0.14 2
IEC VINV 13.5 0 1 13.5 2
IEC EINV 80 0 2 80 2
IEC LINV 120 0 1 120 2
IEEE MINV 0.0515 0.1140 0.02 4.85 2
IEEE VINV 19.61 0.491 1 21.6 2
IEEE EINV 28.2 0.1217 2 29.1 2
Characteris‐
tic
»Char«
Trip Delay Reset Delay
(only for »Reset Mode« =
“inverse time”)
t =
k
b -
c
⎛
⎝
I
I>
⎞
⎠
⋅ tChar
t =
τ
1 -
⎛
⎝
I
I>
⎞
⎠
α
⋅ tChar
k
[s]
b c τ
[s]
α
RINV 1.0 0.339 0.236 1.0 2
274 WIC1 WIC1-1.0-EN-MAN
11 Appendix
11.2.1.2 Inverse-Time Characteristics (I>, I>>, I>>>)