ABB RELION 620 Series Technical Manual page 656

Section 7
Measurement functions
Parameter Values (Range)
Ng Seq A low low Lim 0.00...40.00
Ng Seq A deadband 100...100000
Zro A Hi high Lim 0.00...40.00
Zro A High limit 0.00...40.00
Zro A low limit 0.00...40.00
Zro A low low Lim 0.00...40.00
Zro A deadband 100...100000
7.1.8.5
7.1.8.6
650
Unit Step
xIn
xIn
xIn
xIn
xIn
Monitored data
Table 485: I1, I2, I0 Monitored data
Name Type
I2-A FLOAT32
I1-A FLOAT32
I0-A FLOAT32
Technical data
Table 486: I1, I2, I0 Technical data
Characteristic
Operation accuracy
Suppression of harmonics
Default Description
0.00 Low alarm current limit for negative sequence
current
2500 Deadband configuration value for negative
sequence current for integral calculation.
(percentage of difference between min and
max as 0,001 % s)
2 High alarm current limit for zero sequence
current
2 High warning current limit for zero sequence
current
0.00 Low warning current limit for zero sequence
current
0.00 Low alarm current limit for zero sequence
current
2500 Deadband configuration value for zero
sequence current 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
Depending on the frequency of the measured
current: f/f = ±2 Hz
n
±1.0% or ±0.002 × I
at currents in the range of 0.01...4.00 × I
DFT: -50 dB at f = n × f
1MAC504801-IB E
Description
Measured negative sequence
current
Measured positive sequence
current
Measured zero sequence
current
n
n
, where n = 2, 3, 4, 5,...
n
620 series ANSI
Technical Manual