ABB REX640 Product Manual page 63

REX640
Product version: 1
Table 106. Shunt capacitor bank switching resonance protection, current based (SRCPTOC)
Characteristic
Operation accuracy
Reset time
Retardation time
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
Table 107. Shunt capacitor bank switching resonance protection, current based (SRCPTOC) main settings
Parameter
Alarm start value
Start value
Tuning harmonic Num
Operate delay time
Alarm delay time
Table 108. Compensated neutral unbalance voltage protection (CNUPTOV)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy
Suppression of harmonics
Start value = 0.1 × U
1) , Voltage before fault = 0.9 × U
n
distribution of 1000 measurements
2) Measured with static signal output (SSO)
Table 109. Compensated neutral unbalance voltage protection (CNUPTOV) main settings
Parameter
Start value
Operate delay time
ABB
Function
SRCPTOC
SRCPTOC
SRCPTOC
SRCPTOC
SRCPTOC
U = 1.1 × set Start value
Fault
, f = 50 Hz, overvoltage in one phase-to-earth with nominal frequency injected from random phase angle, results based on statistical
n n
Function
CNUPTOV
CNUPTOV
Value
Depending on the frequency of the measured current: fn ±2 Hz
Operate value accuracy:
±3% of the set value or ±0.002 × I
±1.5% of the set value or ±0.002 × I
order)
±6% of the set value or ±0.004 × I
Typically 45 ms or maximum 50 ms
Typically 0.96
<35 ms
±1.0% of the set value or ±20 ms
-50 dB at f = f
n
Value (Range)
0.03...0.50 × I
n
0.03...0.50 × I
n
1...11
120...360000 ms
120...360000 ms
Value
Depending on the frequency of the measured voltage: f
±1.5% of the set value or ±0.002 × U
Typically 75 ms
Typically 40 ms
Typically 0.96
<35 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
Value (Range)
0.01...1.00 × U
n
100...300000 ms
1MRS759144 A
nd
(for 2 order Harmonics)
n
rd
(for 3 order < Harmonics < 10th
n
(for Harmonics >= 10th order)
n
Step
0.01
0.01
1
1
1
±2 Hz
n
n
Step
0.01
100
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