Transient-Intermittent Earth-Fault Protection Intrptef - ABB RELION 620 Series Technical Manual

1MRS757644 H
4.2.2.14 Technical revision history
Table 425: DEFHPDEF Technical revision history
Technical revision
B
C
D
E
F
Table 426: DEFLPDEF Technical revision history
Technical revision
B
C
D
E
F
4.2.3

Transient-intermittent earth-fault protection INTRPTEF

620 series
Technical Manual
Protection functions
Change
Maximum value changed to 180 deg for the
Max forward angle setting
Added a setting parameter for the "Meas-
ured Io" or "Calculated Io" selection and set-
ting parameter for the "Measured Uo", "Cal-
culated Uo" or "Neg. seq. volt." selection for
Operate delay time and Mini-
polarization.
mum operate time changed from 60 ms to
40 ms. The sector default setting values are
changed from 88 degrees to 80 degrees.
Step value changed from 0.05 to 0.01 for the
Time multiplier setting.
Unit added to calculated operating current
output (I_OPER).
Pol quantity .
Added setting
Change
Maximum value changed to 180 deg for the
Max forward angle setting.
Start value step changed to 0.005
Added a setting parameter for the "Meas-
ured Io" or "Calculated Io" selection and set-
ting parameter for the "Measured Uo", "Cal-
culated Uo" or "Neg. seq. volt." selection for
polarization. The sector default setting val-
ues are changed from 88 degrees to 80 de-
grees.
Step value changed from 0.05 to 0.01 for the
Time multiplier setting.
Unit added to calculated operating current
output (I_OPER).
Pol quantity . Minimum value
Added setting
Operate delay time and Minimum operate
for
time changed from "60 ms" to "50 ms". De-
Operate delay time and Mini-
fault value for
mum operate time changed from "60 ms" to
"50 ms".
419