Table 64. 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
Table 65. 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
Table 66. Radial feeder protection PAPGAPC
Function
Range or value Accuracy
Residual current detection (10 - 150)% of IBase ±1.0% of Ir at I ≤ Ir
±1.0% of I at I > Ir
Reset ratio >95% at (50 - 150)% of IBase -
Operate time, residual current detection at 0 to 2
x I
set
Min. = 15 ms -
Max. = 30 ms
Independent time delay to operate, residual
current detection at 0 to 2 x I
set
(0.000 - 60.000) s ±0.2% or ±40 ms whichever is greater
Voltage based phase selection (30 - 100)% of UBase ±1.0% of U
r
Reset ratio <115% -
Operate time, voltage based phase selection at
1.2 to 0.8 x U
set
Min. = 15 ms -
Max. = 30 ms
Independent time delay to operate, voltage
based phase selection at 1.2 to 0.8 x U
set
(0.000 – 60.000) s ±0.2% or ±40 ms whichever is greater
1MRK 505 346-BEN -
Line differential protection RED670 2.1 IEC
Product version: 2.1
ABB 77
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