Woodward HighPROTEC - Page 685

Protective Elements
ANSI Moderately Inverse
Various reset modes are available:
Resetting via characteristic, delayed and instantaneous.
Remark: For I > 20⋅ I
>
, the curve stops decreasing, the t-values are kept constant at the value for I = 20⋅ I
>
.
685 MCDGV4 DOK-HB-MCDGV4-2E
1
0.5
2
5
10
15
0.01 0.1
1 10 100
0.1
1
10
100
1000
t [s]
I / I> (multiples of pickup)
tchar=
Pdoc_Z05
Reset Trip
»Char« = ANSI MINV
If: < 1
I
I>
≤ 20If:
I
I>
1 <
t
−1
0.0515
=
I
I>
0.02
tchar+ 0.1140
t
1−
4.85
=
I
I>
2
tchar