ABB RED615 Product Manual page 20

Line Differential Protection and Control
RED615
Product version: 1.1
Negative phase-sequence current protection (NSPTOC)
Operation accuracy
Start time
1) 2)
I
I
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
1) Set Operate delay time = 0,02 s, Operate curve type = IEC definite time, negative sequence current before
fault = 0.0, f = 50 Hz, results based on statistical distribution of 1000 measurements
n
2) Includes the delay of the signal output contact
3) Includes the delay of the heavy-duty output contact
Negative phase-sequence current protection (NSPTOC) main settings
Parameter
Start value
Time multiplier
Operate delay time
Operating curve type 1)
1) For further reference please refer to the Operating characteristics table at the end of the Technical data chapter
Circuit breaker failure protection (CCBRBRF)
Operation accuracy
Operate time accuracy
0
= 2 x set Start value
Fault
= 10 x set Start value
Fault
Function
NSPTOC
NSPTOC
NSPTOC
NSPTOC
Depending on the frequency of the current
measured: fn ±2Hz
±1.5% of the set value or ±0.002 x I
±1.0% of the set value or ±20 ms
Depending on the frequency of the
current measured: f = ±2Hz
n
±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 3)
DFT: -50dB at f = n x f , where
n
n = 2, 3, 4, 5,...
Value (Range)
0.01...5.00 x I
n
0.05...15.00
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
n
1MRS756500 A
n
Maximum
25 ms
17 ms
Step
0.01
0.05
10
ABB