- 1 -
2. Introduction
2.1. Summary
Reclosers are used in distribution system. In case of line fault, due to temporarily
overcurrent, Reclosers can break and make currents several times, thus avoiding longer
network interruptions due to temporary faults. But, in case of permanent fault, because
fault current is still detected after trip and reclosing actions of pre-set sequences, Recloser
is locked out finally as opened.
The pre-set sequences are available to set five times, and for both phase and ground, the
combined operations are possible within the range of 5 instantaneous or 5 times delayed
operating. The first interruption of a fault regarding instantaneous operation, is done
quickly and instantaneously, so that even the fuses in the system do not operate. After
setting time, it recloses back on. And the next interruption has a definite or inverse time
delay. Thus downstream fuses or other protection devices in the network have the chance
to operate and isolate the affected network section, restoring normal operation in the
remaining work. Therefore reclosers make the range of fault section to be limited.
Mainly Reclosers which are installed in overhead distribution line, provide the measurement
of electric current flowing in the distribution line. In case of load current occurrence and
fault detection, it opens and recloses repeatedly according to setting sequence, and at the
sametime, it transmits the status/receives the command to/from HOST and remote controls
of opening/reclosing to minimize the accident. Besides, it stores the whole events in
distribution line, provides the fault causes, and it performs remote monitoring and controls
by transmitting data through DNP3.0, IEC60870-5-101, IEC60870-5-104 protocols.
2.2. Main functions and features
◆ Protection Function
- Fault Detection about phase and ground fault
- SEF(Sensitive Earth Fault) used on non-grounded network
- Inrush current control function during fault detection
- In case of Cold Load, Fault Pickup Level adjustment
- Phase Loss Detection
- Phase Sync Fail Detection about source and load voltage
- Automatic breaking and reclosing by detecting phase and ground fault
- Detecting fault and monitoring the status in distribution line
- Built-in 50 types of recloser curves including IEC, ANSI/IEEE, McGraw Edison Recloser
curve
- Equiped with 4 types of curves(N1, N2, N3, N4) developed by Korea Electric Power
Research Institute(KEPRI, under KEPCO)
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...
