ABB RED615 Product Manual page 42

Line Differential Protection and Control
RED615
Product version: 4.0
Table 44. 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 x U
statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
Table 45. Residual overvoltage protection (ROVPTOV) main settings
Parameter
Start value
Operate delay time
Table 46. Negative phase-sequence overcurrent protection (NSPTOC)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
1) Negative sequence current before fault = 0.0, f
2) Includes the delay of the signal output contact
Start value = 2.5 x I Start value multiples in range of 1.5 to 20
3) Maximum ,
n
42
Start value
U = 1.1 x set
Fault
, f = 50 Hz, residual voltage with nominal frequency injected from random phase angle, results based on
n n
Function
ROVPTOV
ROVPTOV
I = 2 x set Start value
Fault
I = 10 x set Start value
Fault
= 50 Hz, results based on statistical distribution of 1000 measurements
n
Value
Depending on the frequency of the voltage measured: f
±2 Hz
±1.5% of the set value or ±0.002 x U
Minimum Typical
55 ms 56 ms
< 40 ms
Typical 0.96
< 35 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n x f , where n = 2, 3, 4, 5,...
n
Value (Range)
0.010...1.000 x U
n
40...300000 ms
Value
Depending on the frequency of the current measured: f
±2 Hz
±1.5% of the set value or ±0.002 x I
Minimum Typical
22 ms 24 ms
14 ms 16 ms
< 40 ms
Typical 0.96
< 35 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20 ms
DFT: -50 dB at f = n x f , where n = 2, 3, 4, 5,...
n
1MRS756500 F
n
n
Maximum
58 ms
Step
0.001
1
n
n
Maximum
25 ms
17 ms
3)
ABB