SEMOD166919-2 v7
Table 76. 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 x UDAlarm 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 x UDTrip 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 x UDTrip to 0.8 x
UDTrip
(0.000–60.000)s ±0.2% or ±40 ms whichever is greater
SEMOD175210-2 v6
Table 77. 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
GUID-C172D5EB-51E8-4FC9-B2E7-EF976872FD7E v6
Table 78. 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 x U
set
to 0.8 x U
set
Min. = 15 ms -
Max. = 30 ms
Independent time delay to operate,
voltage-based phase selection at 1.2 x U
set
to 0.8 x U
set
(0.000 – 60.000) s ±0.2% or ±40 ms whichever is greater
Line differential protection RED670
1MRK 505 379-BEN N
108 Hitachi Power Grids
© Copyright 2017 Hitachi Power Grids. All rights reserved
To Next Page
Loading...
