ABB Relion 670 series - Page 657

VDTrip_A
V1Low_A
AND
O
R
VDAlarm_A
VDTrip_B
VDAlarm_B
VDTrip_C
VDAlarm_C
AND
AND
AND
AND
AND
O
R
TRIP
PICKUP
ALARM
V1Low_B
V1Low_C
V2Low_A
V2Low_B
V2Low_C
AND
AND
0-tAlarm
OR
AND
AND
AND
BLOCK
AND
AND
V1LOW
V2LOW
en06000382_2_ansi.vsd
0
0-t1
0
0-tAlarm
0
0-tTrip
0
0-tReset
0
BlkDiffAtULow
AND
ANSI06000382 V3 EN-US
Figure 352: Principle logic for Voltage differential function VDCPTOV (60)
9.5.8 Technical data
SEMOD166919-2 v6
Table 367: VDCPTOV (60) technical data
Function Range or value Accuracy
Voltage difference for alarm
and trip
(2.0–100.0) % of VBase ±0.5% of V
n
Under voltage level (1.0–100.0) % of VBase ±0.5% of V
n
Independent time delay for
voltage differential alarm at
0.8 to 1.2 x VDAlarm
(0.000–60.000)s ±0.2% or ±40 ms whichever is greater
Independent time delay for
voltage differential trip at 0.8
to 1.2 x VDTrip
(0.000–60.000)s ±0.2% or ±40 ms whichever is greater
Independent time delay for
voltage differential reset at 1.2
to 0.8 x VDTrip
(0.000–60.000)s ±0.2% or ±40 ms whichever is greater
1MRK 502 066-UUS B Section 9
Voltage protection
651
Technical manual