ABB REG670 - Technical Data

UDTripL1>
U1<L1
AND
O
R
UDAlarmL1>
UDTripL2>
UDAlarmL2>
UDTripL3>
UDAlarmL3>
AND
AND
AND
AND
AND
t
tReset
t
tAlarm
O
R
t
tTrip
TRIP
START
ALARM
U1<L2
U1<L3
U2<L1
U2<L2
U2<L3
AND
t
tAlarm
t
t1
OR
AND
AND
AND
BLOCK
AND
AND
U1LOW
U2LOW
en06000382-2.vsd
BlkDiffAtULow
AND
AND
IEC06000382 V3 EN
Figure 255: Principle logic for Voltage differential function VDCPTOV
9.5.8 Technical data
Table 297: VDCPTOV technical data
Function
Range or value Accuracy
Voltage difference for alarm and
trip
(2.0–100.0) % of UBase ±0.5% of U
r
Under voltage level (1.0–100.0) % of UBase ±0.5% of U
r
Independent time delay for
voltage differential alarm at 0.8 to
1.2 x UDAlarm
(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 UDTrip
(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 UDTrip
(0.000–60.000)s
±0.2% or ±40 ms whichever is
greater
1MRK502052-UEN B Section 9
Voltage protection
531
Technical manual