ABB RELION 670 Series Product Manual page 84

Transformer protection RET670 2.1 IEC
Table 61. Capacitor bank protection CBPGAPC
Function
Operate value, overcurrent
Reset ratio, overcurrent
Start time, overcurrent, at 0.5 to 2 x Iset
Reset time, overcurrent, at 2 x Iset to 0.5
Critical impulse time, overcurrent protection start
Impulse margin time, overcurrent protection start
Operate value, undercurrent
Reset ratio, undercurrent
Operate value, reconnection inhibit function
Operate value, reactive power overload function
Operate value, voltage protection function for harmonic overload
(Definite time)
Operate value, voltage protection function for harmonic overload
(Inverse time)
Inverse time characteristic
Maximum trip delay, harmonic overload IDMT
Minimum trip delay, harmonic overload IDMT
Independent time delay, overcurrent at 0 to 2 x Iset
Independent time delay, undercurrent at 2 x Iset to 0
Independent time delay, reactive power overload function at 0 to 2
x QOL>
Independent time delay, harmonic overload at 0 to 2 x HOL>
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GUID-6A7DA510-E145-4C5B-A7DC-97BC4258E621 v8
Range or value
(10-900)% of lBase
>95% at (100-900)% of IBase
Min. = 5 ms
Max. = 20 ms
Min. = 25 ms
Max. = 40 ms
2 ms typically at 0.5 to 2 x Iset
1 ms typically at 0.5 to 10 x Iset
10 ms typically
(5-100)% of IBase
<105% at (30-100)% of IBase
(4-1000)% of IBase
(10-900)%
(10-500)%
(80-200)%
According to IEC 60871-1 (2005) and
IEEE/ANSI C37.99 (2000)
(0.05-6000.00) s
(0.05-60.00) s
(0.00-6000.00) s
(0.00-6000.00) s
(1.00-6000.00) s
(0.00-6000.00) s
1MRK 504 155-BEN F
Accuracy
±2.0% of I at I ≤ I
r r
±2.0% of I at I > I
r
-
-
-
-
±2.0% of I
r
-
±1.0% of I at I ≤ I
r r
±1.0% of I at I > I
r
±1.0% of S at S ≤ S
r r
±1.0% of S at S > S
r
±0.5% of U at U ≤ U
r r
±0.5% of U at U > U
r
±0.5% of U at U ≤ U
r r
±0.5% of U at U > U
r
±20% or ±200 ms
whichever is greater
±20% or ±200 ms
whichever is greater
±20% or ±200 ms
whichever is greater
±0.2% or ±30 ms
whichever is greater
±0.2% or ±60 ms
whichever is greater
±0.2% or ±100 ms
whichever is greater
±0.2% or ±35 ms
whichever is greater
ABB