ABB Relion 611 Series, Technical Manual

Page: 177 / 536

Characteristic Value
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 RMS: No suppression
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
Peak-to-Peak: No suppression
1)
Measurement mode = default (depends on stage), current before fault = 0.0 × I
n
, f
n
= 50 Hz, earth-fault
current 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
3) Maximum
Start value = 2.5 × I
n
,
Start value multiples in range of 1.5...20
4.2.1.12 Technical revision history
Table 176: EFIPTOC Technical revision history
Technical revision Change
B The minimum and default values changed to 40
ms for the
Operate delay time setting
C Minimum and default values changed to 20 ms for
the
Operate delay time setting
Minimum value changed to 1.00 x I
n
for the Start
value setting
D Added a setting parameter for the "Measured Io"
or "Calculated Io" selection
E Internal improvement
F Internal improvement
Table 177: EFHPTOC Technical revision history
Technical revision Change
B Minimum and default values changed to 40 ms for
the
Operate delay time setting
C Added a setting parameter for the "Measured Io"
or "Calculated Io" selection
D Step value changed from 0.05 to 0.01 for the
Time
multiplier setting
E Internal improvement
F Internal improvement
Table 178: EFLPTOC Technical revision history
Technical revision Change
B The minimum and default values changed to 40
ms for the
Operate delay time setting
C Start value step changed to 0.005
D Added a setting parameter for the "Measured Io"
or "Calculated Io" selection
Table continues on next page
1MRS757454 D
Section 4
Protection functions
611 series 171
Technical Manual