
SEMOD166919-2 v6
Table 67. Voltage differential protection VDCPTOV
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
SEMOD175210-2 v6
Table 68. Loss of voltage check LOVPTUV
Function
Range or value
Accuracy
Operate voltage
(1–100)% of UBase
±0.5% of U
r
Pulse timer when
disconnecting all three phases
(0.050–60.000) s
±0.2% or ±15 ms whichever is greater
Time delay for enabling the
functions after restoration
(0.000–60.000) s
±0.2% or ±35 ms whichever is greater
Operate time delay when
disconnecting all three phases
(0.000–60.000) s
±0.2% or ±35 ms whichever is greater
Time delay to block when all
three phase voltages are not
low
(0.000–60.000) s
±0.2% or ±35 ms whichever is greater
1MRK 504 155-BEN F
Transformer protection RET670 2.1 IEC
ABB
89
Содержание Relion 670 series
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