RECLOSER CONTROL EVRC2A-N6,NT
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5-Reclosers Loop control at F3 Fault
Figure 6-10. 5-Reclosers Loop Control at F2 Fault
Step1 : When Permanent Fault occurs at F3, MID(RC2) operate reclosing sequence and tirp
lockout. During MID(RC2) operation, accumulate Dead line time, and the accumulated
Dead line time becomes “DL Pick T”. When the line is Dead Line, “LL Regain T”
operates.
“DL Pick T” is set by summing all reclosing time of back line equipment.
Step2 : “LL Regain T” is set, and if the line is not becoming Live line within a set time, TIE(RC3)
operate. When “LL Regain T” is enable, TIE(RC3) changes to Alternate setting
automatically.
Step3 : When closing TIE(RC3), TIE(RC3) trip once and lockout because of F3 fault.
F3 is isolated by Loop control operation, the rest of region shall be alive by backward
distributing line.
Step4 : After removing the fault, close MID(RC3)
Step5 : Manually open TIE(RC3) and change to Primary setting.
Enable Loop control of TIE(RC3), and recover the previous the line as the previous
normal line.
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