Table 579:
Inverse time characteristics for residual overvoltage protection
Function
Range or value
Accuracy
Type A curve:
=
-
>
>
æ
ö
ç
÷
è
ø
t
k
U
U
U
EQUATION1436-SMALL V1 EN
U> = U
set
U = U
measured
k = (0.05-1.10) in steps of
0.01
±5% +70 ms
Type B curve:
2.0
480
32
0.5
0.035
=
×
-
>
×
-
-
>
æ
ö
ç
÷
è
ø
t
k
U
U
U
EQUATION1437-SMALL V1 EN
k = (0.05-1.10) in steps of
0.01
Type C curve:
3.0
480
32
0.5
0.035
=
×
-
>
×
-
-
>
æ
ö
ç
÷
è
ø
t
k
U
U
U
EQUATION1438-SMALL V1 EN
k = (0.05-1.10) in steps of
0.01
Section 21
1MRK 502 048-UEN A
Time inverse characteristics
692
Technical manual
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