Table 55. Capacitor bank protection CBPGAPC
Function Range or value Accuracy
Operate value, overcurrent (10-900)% of lBase ±2.0% of I
r
at I ≤ I
r
±2.0% of I at I > I
r
Reset ratio, overcurrent >95% at (100-900)% of IBase -
Start time, overcurrent, at 0.5 to 2 x Iset Min. = 5 ms
Max. = 20 ms
-
Reset time, overcurrent, at 2 x Iset to 0.5 Min. = 25 ms
Max. = 40 ms
-
Critical impulse time, overcurrent protection start 2 ms typically at 0.5 to 2 x Iset
1 ms typically at 0.5 to 10 x Iset
-
Impulse margin time, overcurrent protection start 10 ms typically
Operate value, undercurrent (5-100)% of IBase ±2.0% of I
r
Reset ratio, undercurrent <105% at (30-100)% of IBase -
Operate value, reconnection inhibit function (4-1000)% of IBase ±1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
Operate value, reactive power overload function (10-900)% ±1.0% of S
r
at S ≤ S
r
±1.0% of S at S > S
r
Operate value, voltage protection function for harmonic overload (Definite
time)
(10-500)% ±0.5% of U
r
at U ≤ U
r
±0.5% of U at U > U
r
Operate value, voltage protection function for harmonic overload (Inverse
time)
(80-200)% ±0.5% of U
r
at U ≤ U
r
±0.5% of U at U > U
r
Inverse time characteristic According to IEC 60871-1 (2005) and
IEEE/ANSI C37.99 (2000)
±20% or ±200 ms
whichever is greater
Maximum trip delay, harmonic overload IDMT (0.05-6000.00) s ±20% or ±200 ms
whichever is greater
Minimum trip delay, harmonic overload IDMT (0.05-60.00) s ±20% or ±200 ms
whichever is greater
Independent time delay, overcurrent at 0 to 2 x Iset (0.00-6000.00) s ±0.2% or ±30 ms whichever
is greater
Independent time delay, undercurrent at 2 x Iset to 0 (0.00-6000.00) s ±0.2% or ±60 ms whichever
is greater
Independent time delay, reactive power overload function at 0 to 2 x
QOL>
(1.00-6000.00) s ±0.2% or ±100 ms
whichever is greater
Independent time delay, harmonic overload at 0 to 2 x HOL> (0.00-6000.00) s ±0.2% or ±35 ms whichever
is greater
Transformer protection RET670 2.0
1MRK 504 141-BEN C
Product version: 2.0
70 ABB
To Next Page
Loading...
