ABB RED670 - Negative Sequence Overvoltage Protection LCNSPTOV; Zero Sequence Overvoltage Protection LCZSPTOV

Table 87. 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 to 0 x U
set
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
Table 88. 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 to 0 x U
set
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
1MRK 505 346-BEN -
Line differential protection RED670 2.1 IEC
Product version: 2.1
ABB 91