ABB Relion 670 series - Page 1197

Table 731: Inverse time characteristics for 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
1191
Technical reference manual