ABB RED615 Product Manual page 42

Line Differential Protection and Control
RED615
Product version: 2.0
Table 47. Current circuit supervision (CCRDIF) main settings
Parameter
Start value
Maximum operate
current
Control functions
Table 48. Autoreclosure (DARREC)
Characteristic
Operate time accuracy
Measurement functions
Table 49. Three-phase current measurement (CMMXU)
Characteristic
Operation accuracy
Suppression of harmonics
Table 50. Current sequence components (CSMSQI)
Characteristic
Operation accuracy
Suppression of harmonics
42
Values (Range)
0.05...0.20
1.00...5.00
Unit
x I
n
x I
n
Value
±1.0% of the set value or ±20 ms
Value
Depending on the frequency of the current
measured: f ±2Hz
n
±0.5% or ±0.002 x I
n
(at currents in the range of 0.01...4.00 x I
DFT: -50dB at f = n x f
n
...
RMS: No suppression
Value
Depending on the frequency of the current
measured: f/f = ±2Hz
n
±1.0% or ±0.002 x I
n
at currents in the range of 0.01...4.00 x I
DFT: -50dB at f = n x f
n
...
1MRS756500 B
Issued: 03.07.2009
Description
Minimum operate
current differential
level
Block of the function
at high phase current
)
n
, where n = 2, 3, 4, 5,
n
, where n = 2, 3, 4, 5,
ABB