Self-powered feeder protection
REJ603
Product version: 3.0
Table 26.
High- set earth-fault protection, stage I0>> / 50N
Parameter
Setting range of pick-up current 'I0 >>'
Operation accuracy
1)
Operation mode
Operate time delay (DMT) 't0 >>'
Operation time accuracy
1)
Reset ratio
1)
Operation time accuracy for protection functions when relay is in energised condition.
Table 27.
Transformer inrush detection, 3I2f> / 68
Parameter
Inrush threshold value
Ratio Setting
Table 28.
Thermal overload protection, 3Ith> / 49
Parameter
Initial thermal level of apparatus 0
Reference current leading to thermal
calculation "Ib"
Heating time constant of object ''
Cooling time constant of object '
Alarm value, alm
Operate value, trip
Options for calculating thermal value
during power interruption, powerOFF
Operation time accuracy
Reset ratio
Options for calculating thermal image during power interruption shall be as below
1)
1 = On restoration of power, new value of current after power on will be considered to calculate new value of thermal image for
interruption period Δt.
2 = On restoration of power, new value of thermal image is calculated for interruption period Δt considering that current has
remained constant value during power interruption.
3 = Power interruption of the relay assumes no change of thermal image during interruption period.
4 = Power interruption of the relay resets the thermal image to the set value defined by setting 0.
15
Value (Range)
External earth measurement (through CBCT or residual connection) :
0.01...12.5 x In in steps 0.001, infinite
Internal earth measurement : 0.1...12.5 x In in steps 0.001, infinite
External earth measurement : ± 3.0% x In for value < 1.2 In , ± 3.0%
x I for value ≥ 1.2 In
Internal earth measurement : ± 9.0% x In for value < 1.2 In , ± 9.0% x
I for value ≥ 1.2 In
Definite time, Instantaneous
0.04...64 s in steps of 0.01
External earth measurement : ± 2.0% of set value or ± 30 ms
Internal earth measurement : ± 10.0% of set value or ± 30 ms
0.98
Value (Range)
0.2...32 x In, in steps of 0.01
10%...50%, in steps of 1%
Value (Range)
0.0...100%, in steps of 1%
0.1 ... 1.5 x In, in steps of 0.1
1.0...300 min, in steps of 1.0
'
1.0...300 min, in steps of 1.0
↓
50...200%, in steps of 1%
50...200%, in steps of 1%
1...4
1)
3% of 5 time constant or ± 30s
0.98
1MDB07217-YN
Issued: 2017-11-21
Revision: E
ABB