Table 733:
Inverse time characteristics for residual overvoltage protection
Function
Range or value
Accuracy
Type A curve:
=
-
æ
ö
ç
÷
è
ø
t
td
V
VPickup
VPickup
EQUATION1661 V1 EN
V = V
measured
td = (0.05-1.10) in steps
of 0.01
5% +40 ms
Type B curve:
=
×
-
×
-
-
æ
ö
ç
÷
è
ø
2.0
480
32
0.5
0.035
t
td
V
VPickup
VPickup
EQUATION1662 V1 EN
td = (0.05-1.10) in steps
of 0.01
Type C curve:
=
×
-
×
-
-
æ
ö
ç
÷
è
ø
3.0
480
32
0.5
0.035
t
td
V
VPickup
VPickup
EQUATION1663 V1 EN
td = (0.05-1.10) in steps
of 0.01
Programmable curve:
×
=
+
-
×
-
æ
ö
ç
÷
è
ø
P
td A
t
D
V
VPickup
B
C
VPickup
EQUATION1664 V1 EN
td = (0.05-1.10) in steps
of 0.01
A = (0.005-200.000) in
steps of 0.001
B = (0.50-100.00) in
steps of 0.01
C = (0.0-1.0) in steps of
0.1
D = (0.000-60.000) in
steps of 0.001
P = (0.000-3.000) in
steps of 0.001
1MRK505222-UUS C
Section 22
Inverse time characteristics
1193
Technical reference manual
Summary of Contents for Relion 670 series
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