Table 61. Shunt capacitor bank switching resonance protection, current based (SRCPTOC)
Characteristic Value
Operation accuracy Depending on the frequency of the measured current: fn ±2 Hz
Operate value accuracy:
±3% of the set value or ±0.002 × I
n
(for 2
nd
order Harmonics)
±1.5% of the set value or ±0.002 × I
n
(for 3
rd
order < Harmonics < 10th
order)
±6% of the set value or ±0.004 × I
n
(for Harmonics >= 10th order)
Reset time Typically 45 ms or maximum 50 ms
Retardation time Typically 0.96
Retardation time <35 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Suppression of harmonics -50 dB at f = f
n
Table 62. Shunt capacitor bank switching resonance protection, current based (SRCPTOC) main settings
Parameter
Function Value (Range) Step
Alarm start value SRCPTOC
0.03...0.50 × I
n
0.01
Start value SRCPTOC 0.03...0.50 × I
n
0.01
Tuning harmonic Num SRCPTOC 1...11 1
Operate delay time SRCPTOC 120...360000 ms 1
Alarm delay time SRCPTOC 120...360000 ms 1
Capacitor Bank Protection and Control
1MRS757952 D
Product version: 5.0 FP1
ABB 39
To Next Page
Loading...
Need help?
General
