RECLOSER CONTROL EVRC2A-N6,NT
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3-Reclosers Loop control at F1 Fault
Figure 6-11. 3-Reclosers Loop control at F1 Fault
Step1 : When Permanent Fault occurs at F1, CB1 operates reclosing sequence and then Trip
Lockouts. During CB1 operation, accumulates Dead line time and the accumulated time
becomes “DL Pick T”. When a line is Dead Line, “LL Regain T” operates.
“DL Pick T” is set by summing all reclosing time of back line equipment.
SEC, TIE has the same setting time.
Step2 : “LL Regain T” is set, and if the line is not becoming Live line within a set time,
SEC(RC1), TIE(RC2) operate. To operate “LL Regain T” from SEC
→
TIE in turn, TIE
shall have longer time set than SEC.
When “LL Regain T” is finished, SEC(RC1) is opened automatically, TIE(RC2)
automatically changes to Alternate setting and close.
F1 is isolated by Loop control operation, the rest of region shall be alive by backward
distributing line.
Step3 : After removing the fault, close CB1, SEC(RC1) is automatically closed after Auto
Restoration Time.
Step4 : Manually open TIE(RC2) and change to Primary setting.
Enable Loop control of TIE(RC2) and recover the line as the previous normal line.
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