RECLOSER CONTROL EVRC2A-N6,NT
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6.8. Loop Control - Option
The purpose of using LOOP CONTROL is to isolate a fault area and protect the normal
operation area by coordinating with C/B or Recloser when a fault occurs.
Loop control is able to provide automation system with using Sectionalizing Recloser, MID
point Recloser, TIE point Recloser.
Loop control is performed by voltage sensing of DV(Dead Line Voltage), LV(Live Line Voltage).
Sectionalizing Recloser(SEC)
When a fault is occurred from the source side of Sectionalizing Recloser and backup C/B
operates, the line becomes DV and if it continues, it is figured as a permanent fault. Hence,
Sectionalizing Recloser is opened. After Sectionalizing Recloser is opened and TIEpoint
Recloser is closed, the current flows in opposite way. Therefore, the load side of Sectionalizing
Recloser can keep the live line. When Load side of Sectionalizing Recloser has a fault, OCR
Function is operated and the load side is disconnected.
MIDpoint Recloser(MID)
When a fault is occurred in the source side of MIDpoint Recloser and backup C/B or
Sectionalizing Recloser operates, the line becomes DV status and if it continues, it is figured as a
permanent fault, then automatically the setting is changed to Alternate setting. After changed to
Alternate setting, when TIEpoint Recloser is closed, the current flows in opposite way. During
TIEpoint Recloser closed, when a fault occurs, MIDpoint Recloser trips once and lockouts. After
recovering the fault, connect C/B and when the line becomes LV, the setting is automatically
changed to Primary setting and MIDpoint Recloser is closed.
When Load side of MIDpoint Recloser gets a fault, OCR Function is operated and disconnects
the load side.
TIEpoint Recloser (TIE)
TIEpoint Recloser automatically closes when either Source side or Load side becomes DV.
When a fault occurs during automatic closing, the recloser trips once and locks out.
TIEpoint recloser automatically opens when loop control operates automatic closing at both side
and when both sides become DV.
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