Hitachi Relion REL670 Product Manual page 121

Line distance protection REL670
Version 2.2
Table 99. 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 100. 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 506 372-BEN Q
121