Negative-Sequence Overcurrent Protection (Nsptoc) Main Settings; Phase Discontinuity Protection (Pdnsptoc); Phase Discontinuity Protection (Pdnsptoc) Main Settings; Residual Overvoltage Protection (Rovptov) - ABB REX640 Product Manual

REX640
Product version: 1
Table 73. Negative-sequence overcurrent protection (NSPTOC) main settings
Parameter
Start value
Time multiplier
Operate delay time
1)
Operating curve type
1) For further reference, see the Operation characteristics table
Table 74. Phase discontinuity protection (PDNSPTOC)
Characteristic
Operation accuracy
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
Table 75. Phase discontinuity protection (PDNSPTOC) main settings
Parameter
Start value
Operate delay time
Min phase current
Table 76. Residual overvoltage protection (ROVPTOV)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
1) Residual voltage before fault = 0.0 × U
measurements
2) Includes the delay of the signal output contact
ABB
Function
NSPTOC
NSPTOC
NSPTOC
NSPTOC
Function
PDNSPTOC
PDNSPTOC
PDNSPTOC
Start value
U = 2 × set
Fault
, f = 50 Hz, residual voltage with nominal frequency injected from random phase angle, results based on statistical distribution of 1000
n n
Value (Range)
0.01...5.00 × I
n
0.025...15.000
40...200000 ms
Definite or inverse time
Curve type: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19
Value
Depending on the frequency of the measured current: f
±2% of the set value
<70 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)
10...100%
100...30000 ms
0.05...0.30 × I
n
Value
Depending on the frequency of the measured voltage: f
±1.5% of the set value or ±0.002 × U
Minimum Typical
48 ms 51 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
1MRS759144 A
Step
0.01
0.005
10
±2 Hz
n
Step
1
1
0.01
±2 Hz
n
n
Maximum
54 ms
53