ABB RES670 Technical Manual page 900

Section 26
Inverse time characteristics
894
Table 695: Inverse time characteristics for overvoltage protection
Function
Type A curve:
td
=
t
æ ö
-
V VPickup
ç ÷
è ø
VPickup
EQUATION1661 V1 EN-US
V = V
measured
Type B curve:
td ⋅ 480
t =

V − VPickup
32 ⋅ − 0.5


VPickup
EQUATION1662 V2 EN-US
Type C curve:
td ⋅ 480
t =

V − VPickup
 32 ⋅ − 0.5

VPickup
EQUATION1663 V2 EN-US
Programmable curve:
×
td A
=
t
æ ö
-
V VPickup
ç × - ÷
B C
è ø
VPickup
EQUATION1664 V1 EN-US
Range or value
td = (0.05-1.10) in steps of
0.01
td = (0.05-1.10) in steps of
0.01
+ 0.035
2.0



td = (0.05-1.10) in steps of
0.01
+ 0.035
3.0



td = (0.05-1.10) in steps of
0.01
A = (0.005-200.000) in
+ steps of 0.001
D
P
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
1MRK 511 408-UUS A
Accuracy
±5.0% or ±45 ms
whichever is greater
Phasor measurement unit RES670 2.2 ANSI
Technical manual
SEMOD116978-2 v10