ABB RELION 620 Series Technical Manual page 652

Section 7
Measurement functions
7.1.6.4
Table 475: IG Non group settings
Parameter Values (Range)
Operation 1=enable
5=disable
Measurement mode 1=RMS
2=DFT
A Hi high limit res 0.00...40.00
A high limit res 0.00...40.00
A deadband res 100...100000
7.1.6.5
7.1.6.6
646
Settings
Unit Step
xIn
xIn
Monitored data
Table 476: IG Monitored data
Name Type
IG-A FLOAT32
Max demand IG FLOAT32
Min demand IG FLOAT32
Time max demand IG Timestamp
Time min demand IG Timestamp
Technical data
Table 477: IG Technical data
Characteristic
Operation accuracy
Suppression of harmonics
Default Description
1=enable Operation Disable / Enable
2=DFT Selects used measurement mode
2 High alarm current limit
2 High warning current limit
2500 Deadband configuration value for integral
calculation. (percentage of difference between
min and max as 0,001 % s)
Values (Range) Unit
0.00...40.00 xIn
0.00...40.00 xIn
0.00...40.00 xIn
Value
At the frequency f = f
±0.5% or ±0.002 × I
(at currents in the range of 0.01...4.00 × I
DFT: -50 dB at f = n × f
RMS: No suppression
1MAC504801-IB E
Description
Measured residual current
Maximum demand for residual
current
Minimum demand for residual
current
Time of maximum demand
residual current
Time of minimum demand
residual current
n
n
)
n
, where n = 2, 3, 4, 5,...
n
620 series ANSI
Technical Manual