GUID-122A206E-27D2-4D15-AD5A-86B68F1ED559 v6
Table 104. 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 105. 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 R
Version 2.2
Hitachi Energy
131
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Содержание Relion 670 Series
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