ABB RELION 670 Series Technical Manual page 1401

1MRK 502 066-UUS B
Table
1086:
Function
Type A curve:
=
t
æ
V
ç
è
EQUATION1661 V1 EN-US
V = V
measured
Type B curve:
t =

32


EQUATION1662 V2 EN-US
Type C curve:
t =

 32

EQUATION1663 V2 EN-US
Programmable curve:
=
t
æ
ç
B
è
EQUATION1664 V1 EN-US
Technical manual
Inverse time characteristics for residual overvoltage protection
td
ö
-
VPickup
÷
ø
VPickup
td ⋅ 480
+ 0.035
2.0

V − VPickup
0.5
⋅ − 

VPickup
td ⋅ 480
+ 0.035
3.0

V − VPickup
⋅ − 0.5 

VPickup
×
td A
+
D
P
ö
-
V VPickup
× - ÷
C
ø
VPickup
Range or value Accuracy
td = (0.05-1.10) in steps ±5.0% or ±45 ms whichever is greater
of 0.01
td = (0.05-1.10) in steps
of 0.01
td = (0.05-1.10) in steps
of 0.01
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
Section 26
Inverse time characteristics
1395