ABB Relion 670 Series Product Manual page 86

Bay control REC670
Version 2.2
Unbalance protection
Table 59. Shunt Capacitor Cascading Failure Protection SCCFPVOC
Function
Measuring current input
Measuring voltage input
Operating characteristics
Operate current, Step 1
Operate current, Step 2
Reset ratio
Operate time, START at 0 to 2 x Iset
Reset time, START at 2 x Iset to 0
Independent time delay at 0 to 2 x Iset
Second harmonic blocking
Critical impulse time
Impulse margin time
Table 60. Current unbalance protection of shunt capacitor bank SCUCPTOC
Function
Current unbalance level
Reset ratio
Minimum reference current
Independent time delay at 0 to 2 x I
Reset time delay at to 2 x I
set
Inverse time characteristics
Minimum operate time for inverse curve
Operate time, START at 0 to 2 x I
Reset time, START at 2 x I
set
Critical impulse time
Impulse margin time
86
GUID-ABB8C954-A47E-47E2-BD6B-1632325FE0C9 v1
Range
NegSeq, -3*ZeroSeq
NegSeq, -3*ZeroSeq
Voltage restrained over-current
(121-400)% of IBase
(125-400)% of IBase
>95%
Min. = 15 ms
Max.= 30 ms
Min. = 15 ms
Max. = 30 ms
(0.00-60.00) s
(10.0-50.0)% of fundamental
10 ms typically at 0 to 2 x I
15 ms typically
GUID-E6D094FC-3059-4B7A-B171-485B48B9EBC5 v1
Range
(1.0 -1000.0)% of IBase2
>95% at (5.0 - 1000.0)% of IBase2
>75% at (1.0 - 5.0)% of IBase2
(5.0 - 100.0)% of IBase1
(0.00-60.00) s
set
to 0 (0.00 - 60.00) s
Programmable
(0.00 - 60.00) s
Min = 30 ms
set
Max = 60 ms
to 0 Min = 20 ms
Max = 35 ms
10 ms typically at 0 to 10 x I
20 ms typically
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Accuracy
-
-
±1.0% of I
±1.0% of I at I > I
±1.0% of I
±1.0% of I at I > I
±1.0% of I
±1.0% of I at I > I
-
-
-
±0.2% or ±45 ms, whichever is greater
±1.0% of I
-
set
-
Accuracy
±1.0% of Ir at I ≤ Ir
±1.0% of I at I > Ir
-
±1.0% of Ir
±0.2% or ±65 ms, whichever is greater
±0.2% or ±45 ms, whichever is greater
±5.0% or ±65 ms, whichever is greater
±0.2% or ±65 ms, whichever is greater
-
-
-
set
-
1MRK 511 404-BEN N
at I ≤ I
r r
r
at I ≤ I
r r
r
at I ≤ I
r r
r
r
Hitachi Power Grids