Name Type Description
touch voltage according to
the standards
OP_XC BOOLEAN Operate signal according
to cross-country stage earth-
fault module
OP_SOTF BOOLEAN Operate signal according to
SOTF-module
OP_INTR_EF BOOLEAN Operate signal according to
intermittent earth-fault mod-
ule
PEAK_IND BOOLEAN Current transient detection
indication (both in the faulty
and healthy feeder)
INTR_EF BOOLEAN Intermittent earth fault indi-
cation in the faulty feeder
EF_IND BOOLEAN Non-directional indication of
earth-fault in the network
VALID_EF BOOLEAN Validity of earth-fault current
estimate is confirmed
XC_FLT BOOLEAN Indication of cross-country
fault in the network
4.2.10.7 IFPTOC Settings
Table 639: IFPTOC Group settings (Basic)
Parameter
Values (Range) Unit Step Default Description
Voltage start value 0.01...1.00 xUn 0.01 0.20 Start value for neu-
tral point voltage
Uo. Note that Un
means phase to
earth nominal volt-
age.
EF current Str Val 0.005...1.000 xIn 0.001 0.010 Earth-fault current
threshold for DT
stage or IDMT
stage. Note that In
means phase nomi-
nal current.
Touch Vol Str Val 10.0...2900.0 V 0.1 80.0 Touch voltage start
threshold for DT
stage or IDMT
stage in primary
volts
Operating curve
type
15=Definite time
18=Inverse time
EN50522
19=Inverse time
IEEE80
18=Inverse time
EN50522
Selection of time
delay curve type in
touch voltage/fault
current estimation
module
Ena RF compensa-
tion
0=Disable
1=Enable
0=Disable Enable compensa-
tion of fault resist-
ance in the estima-
ted earth-fault cur-
rent
Table continues on the next page
1MRS759142 F Protection functions
REX640
Technical Manual
639
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