GUID-C99E063D-B377-40D5-8481-9F46D4166AED v3
Table 100. Carrier receive logic LCCRPTRC
Function Range or value Accuracy
Operation mode 1 Out Of 2
2 Out Of 2
-
Independent time delay (0.000-60.000) s ±0.2% or ±35 ms whichever is greater
GUID-122A206E-27D2-4D15-AD5A-86B68F1ED559 v6
Table 101. Negative sequence overvoltage protection LCNSPTOV
Function Range or value Accuracy
Operate value, negative sequence
overvoltage
(1-200)% of UBase ±0.5% of U
r
at U≤U
r
±0.5% of U at U>U
r
Reset ratio, negative sequence
overvoltage
>95% at (10–200)% of UBase -
Operate time, start at 0 to 2 x U
set
Min. = 15 ms
Max. = 30 ms
-
Reset time, start at 2 x U
set
to 0 Min. = 15 ms
Max. = 30 ms
-
Critical impulse time, negative
sequence overvoltage
10 ms typically at 0 to 2 x U
set
-
Impulse margin time, negative
sequence overvoltage
15 ms typically -
Independent time delay to operate at
0 to 1.2 x U
set
(0.000-120.000) s ±0.2% or ±40 ms whichever is greater
The stated accuracy is valid for voltage levels up to 300V secondary.
GUID-7A8E7F49-F079-42A0-8685-20288FAD5982 v5
Table 102. Zero sequence overvoltage protection LCZSPTOV
Function Range or value Accuracy
Operate value, zero sequence
overvoltage
(1-200)% of UBase ±0.5% of U
r
at U ≤ U
r
±0.5% of U at U > U
r
Reset ratio, zero sequence overvoltage >95% at (10–200)% of UBase -
Operate time, start at 0 to 2 x U
set
Min. = 15 ms
Max. = 30 ms
-
Reset time, start at 2 x U
set
to 0 Min. = 15 ms
Max. = 30 ms
-
Critical impulse time, zero sequence
overvoltage
10 ms typically at 0 to 2 x U
set
-
Impulse margin time, zero sequence
overvoltage
15 ms typically -
Independent time delay to operate at
0 to 1.2 x U
set
(0.000-120.000) s ±0.2% or ±40 ms whichever is greater
Line differential protection RED670
1MRK 505 379-BEN N
122 Hitachi Power Grids
© Copyright 2017 Hitachi Power Grids. All rights reserved
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