Hitachi Relion 670 Series Product Manual page 131

Line differential protection RED670
Version 2.2
Table 104. Negative sequence overvoltage protection LCNSPTOV
Function
Operate value, negative sequence
overvoltage
Reset ratio, negative sequence
overvoltage
Operate time, start at 0 to 2 x U
Reset time, start at 2 x U
set
Critical impulse time, negative sequence
overvoltage
Impulse margin time, negative sequence
overvoltage
Independent time delay to operate at 0 to
1.2 x U
set
The stated accuracy is valid for voltage levels up to 300V secondary.
Table 105. Zero sequence overvoltage protection LCZSPTOV
Function
Operate value, zero sequence
overvoltage
Reset ratio, zero sequence overvoltage
Operate time, start at 0 to 2 x U
Reset time, start at 2 x U
set
Critical impulse time, zero sequence
overvoltage
Impulse margin time, zero sequence
overvoltage
Independent time delay to operate at 0 to
1.2 x U
set
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GUID-122A206E-27D2-4D15-AD5A-86B68F1ED559 v6
Range or value
(1-200)% of UBase
>95% at (10–200)% of UBase
Min. = 15 ms
set
Max. = 30 ms
to 0 Min. = 15 ms
Max. = 30 ms
10 ms typically at 0 to 2 x U
15 ms typically
(0.000-120.000) s
GUID-7A8E7F49-F079-42A0-8685-20288FAD5982 v5
Range or value
(1-200)% of UBase
>95% at (10–200)% of UBase
Min. = 15 ms
set
Max. = 30 ms
to 0 Min. = 15 ms
Max. = 30 ms
10 ms typically at 0 to 2 x U
15 ms typically
(0.000-120.000) s
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Accuracy
±0.5% of U at U≤U
r r
±0.5% of U at U>U
r
-
-
-
-
set
-
±0.2% or ±40 ms whichever is greater
Accuracy
±0.5% of U at U ≤ U
r r
±0.5% of U at U > U
r
-
-
-
-
set
-
±0.2% or ±40 ms whichever is greater
1MRK 505 379-BEN R
131