ABB RELION REX640 - Page 640

Parameter Values (Range) Unit Step Default Description
DT stage Op time 100...60000 ms 10 500 Operate delay time
for Touch volt-
age/fault current
estimation module,
DT timer
IDMT stage Min Op
Tm
50...6000 ms 10 100 Minimum operate
delay for touch
voltage/fault cur-
rent estimation
module IDMT tim-
er according to
standard EN50522/
IEEE80
IDMT stage Max Op
Tm
500...7200000 ms 10 10000 Maximum operate
delay for touch
voltage/fault cur-
rent estimation
module IDMT tim-
er according to
standard EN50522/
IEEE80
UTp multiplier 0.10...5.00 0.01 1.00 UTp multiplier for
IDMT curve accord-
ing to standard
EN50522
Reduction factor 0.10...1.00 0.01 1.00 Reduction factor
in the touch volt-
age/fault current
estimation mod-
ule according to
standard EN50522/
IEEE80
Maximum earthing
Ris
0.5...1000.0 ohm 0.1 10.0 Maximum earthing
resistance encoun-
tered in the protec-
ted feeder in pri-
mary ohms accord-
ing to standard
EN50522/IEEE80
IEEE multiplier 50.0...5000.0 0.1 157.0 Multiplier accord-
ing to standard
IEEE80
XC stage A Str Val 0.10...5.00 xIn 0.01 1.00 Current threshold
for cross-country
fault module. Note
that In means
phase nominal cur-
rent
XC stage PP V Val 0.01...1.00 xUn 0.01 0.90 Phase-to-phase
voltage threshold
for cross-country
fault detection
module. Note that
Un means phase to
phase nominal volt-
age.
XC stage Op time 60...60000 ms 10 200 Operate delay time
for cross-country
fault detection
stage
Intr EF operate
time
100...10000 ms 10 1000 Operate delay time
during intermittent
earth fault
Table 640: IFPTOC Group settings (Advanced)
Parameter
Values (Range) Unit Step Default Description
EF validity Op
mode
1=Resistive
2=Resistive, Reac-
tive
2=Resistive, Reac-
tive
EF validity opera-
tion mode
Table continues on the next page
Protection functions 1MRS759142 F
640 REX640
Technical Manual