ABB RED615 ANSI, Руководство по эксплуатации продукта

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