ABB RES670 Product Manual page 55

Phasor measurement unit RES670 ANSI
Customized
Product version: 1.2
Table 70. Inverse time characteristics for undervoltage protection
Function
Type A curve:
td
=
t
æ ö
-
VPickup V
ç ÷
è ø
VPickup
EQUATION1658 V1 EN
V = V
measured
Type B curve:
×
td 480
=
t
æ
-
VPickup V
ç × -
32 0.5
è
VPickup
EQUATION1659 V1 EN
V = V
measured
Programmable curve:
é
ê
×
td A
ê
=
t
ê
æ
-
VPickup V
ê
ç × -
B C
ë è
VPickup
EQUATION1660 V1 EN
V = V
measured
ABB
Range or value
td = (0.05-1.10) in steps of 0.01
td = (0.05-1.10) in steps of 0.01
+
0.055
2.0
ö
÷
ø
td = (0.05-1.10) in steps of 0.01
A = (0.005-200.000) in steps of 0.001
ù
B = (0.50-100.00) in steps of 0.01
ú
C = (0.0-1.0) in steps of 0.1
ú
D = (0.000-60.000) in steps of 0.001
+
D
ú
P
ö P = (0.000-3.000) in steps of 0.001
ú
÷
ø û
1MRK511254-BUS B
Accuracy
5% +40 ms
55