Technical Data - ABB REG670 Technical Manual

1MRK502052-UEN B
UDTripL1>
UDTripL2>
UDTripL3>
UDAlarmL1>
UDAlarmL2>
UDAlarmL3>
U1<L1
U1<L2
U1<L3
BlkDiffAtULow
U2<L1
U2<L2
U2<L3
BLOCK
IEC06000382 V3 EN
Figure 255: Principle logic for Voltage differential function VDCPTOV
9.5.8
Technical manual
tAlarm
AND t
AND
OR
t1
AND
t

Technical data

Table 297: VDCPTOV technical data
Function
Voltage difference for alarm and
trip
Under voltage level
Independent time delay for
voltage differential alarm at 0.8 to
1.2 x UDAlarm
Independent time delay for
voltage differential trip at 0.8 to
1.2 x UDTrip
Independent time delay for
voltage differential reset at 1.2 to
0.8 x UDTrip
AND
O
AND
R
AND
AND
O
AND
R
AND
Range or value
(2.0–100.0) % of UBase
(1.0–100.0) % of UBase
(0.000–60.000)s
(0.000–60.000)s
(0.000–60.000)s
Section 9
Voltage protection
tReset tTrip
t
t
AND
AND
tAlarm
t
AND
AND
AND
en06000382-2.vsd
Accuracy
±0.5% of U
r
±0.5% of U
r
±0.2% or ±40 ms whichever is
greater
±0.2% or ±40 ms whichever is
greater
±0.2% or ±40 ms whichever is
greater
TRIP
START
ALARM
U1LOW
U2LOW
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