- 42 -
The way to set is identical with 5.2.3
5.2.5. SEF Fault
SEF(Sensitive Earth Fault) fault is used when ground fault current is small in ungrounded
system. Next it is operation diagram about operation area. Like the picture, +-90° becomes
operation area by setting’s op-Angle. When earth current and voltage volume is over the
set value with a fault and earth current’s phase is in operation area based on earth
voltage, then it is picked up as fault. If this condition is kept during operation time, SEF
Fault is set.
To detect SEF Fault, setting items and ranges are like below.
<Table 5-3> Detecting Set Fault
Category
Item
Range
Default
Step
Unit
Explanation
Op Level
& Time
3I0 Pickup
0.1~20
5.0
0.1
A
Set 3I0 current operation value
-3V0 Pickup
0~80
30
1
%
Set 3V0 voltage operation value
SEF Reset Time
0.00~1.00
0.00
0.01
sec
Set SEF reset time of definite time
Func In Use
OFF/ALARM/
TRIP
OFF
Set SEF fault operation functions
Delay DT Level
25~10000
OFF
1
A
Set operating value at delay DT level
Delay DT Time
0.01~2
2.00
0.01
sec
Set operating time at delay DT time
HCT Level
25~10000
OFF
1
A
Set operating value at high current
trip level
HCT Time
0.01~1
0.04
0.01
sec
Set operating time at high current
trip time
Func In Use
NO/YES
YES
Set phase fault operation functions
Block flt
Pickup
Cold Load Multi
1~10
2
1
A multiplier to prevent the
mis-recognizing as a fault by
increasing a multiply of pick-up level
under cold load condition.
Return Normal I
0~30
0.3
0.01
sec
Set the return current of restraining
operation against cold load
Cold Load Time
0~180
3
1
min
Set restraining time of cold load
Use Cold Load
NO/YES
NO
Set cold load Use/Not use
Inrush Multiply
1~10
2
1
A multiplier to prevent the
mis-recognizing as a fault by
increasing a multiple of pick-up level
under inrush condition
Inrush Time
0~30S
0.02
0.01
sec
Set restraining time of Inrush
Use Inrush
NO/YES
NO
Set inrush Use/Not use
2nd Harmonic
1-50
20
1
%
A level of regarding 2
nd
harmonic as inrush
Use 2nd
Harmonic
0.02~1
0.02
0.01
sec
Set 2
nd
harmonics Use/Not use
Fault
Direction
Trip Direction
OFF/FWD/REV
OFF
Selection of ground fault direction
3V0 Threshold
0~100
20
1
%
Set zero sequence voltage operating value
3I0 Threshold
0~100
20
1
%
Set zero sequence current operating value
3I0 Angle
0~359
300
1
°
Set zero sequence current operating angle
Dir Block OC
NO/YES
NO
Set direction function block
Summary of Contents for RECLOSER
Page 1: ...User Manual Document Version 1 5 Feb 28 2019 http powersys kr http www powersys kr...
Page 14: ...8 3 5 Mechanical Performance and Size Weight 3 5 kg FRONT VIEW Figure 3 1 Front View...
Page 15: ...9 SIDE VIEW 343 00 310 00 91 00 Figure 3 2 Side View...
Page 16: ...10 TOP VIEW 84 0 260 0 225 0 1 0 0t Figure 3 3 Top View...
Page 17: ...11 REAR VIEW 180 0 120 0 Figure 3 4 Rear View...
Page 22: ...16 Controller PCB 215 00 103 90 121 10 112 50 112 50 235 00 205 00 Figure 3 8 Controller PCB...
Page 69: ...63...
Page 71: ...65 Example configuration file...
Page 73: ...67 2 TC Curve 1 4 100 101 10 1 100 101 102 Time sec Current In Multiplies of Setting 1 2 3 4...
Page 74: ...68 3 TC Curve 5 8 100 101 10 1 100 101 102 Time sec Current In Multiplies of Setting 5 6 7 8...
Page 77: ...71 6 TC Curve A D 100 101 10 1 100 101 102 Time sec Current In Multiplies of Setting A B C D...
Page 78: ...72 7 TC Curve E M 100 101 10 1 100 101 102 Time sec Current In Multiplies of Setting E K L M...
Page 79: ...73 8 TC Curve N T 100 101 10 1 100 101 102 Time sec Current In Multiplies of Setting N P R T...
Page 80: ...74 9 TC Curve V Z 100 101 10 1 100 101 102 Time sec Current In Multiplies of Setting V W Y Z...
