ABB Relion REC615, Technical Manual

Page: 293 / 869

Characteristic Value
Reset ratio Typically 0.96
Retardation time <30 ms
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
±5.0% of the theoretical value or ±40 ms
3 4
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
4.2.1.12 Technical revision history
Table 334: 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 335: 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
3 Maximum Start value = 2.5 × I
n
,
Start value multiples in range of 1.5...20
4
Valid for FEFLPTOC
1MRS758755 C Protection functions
REC615 & RER615
Technical Manual
293