RECLOSER CONTROL EVRC2A-N6,NT http://www.entecene.co.kr
178
ENHANCED
TECHNOLOGY
As shown in “Figure 7-11. Sequence Coordination Operation Block Diagram”, if Sequence
Coordination feature at Back-up Recloser is enabled and a phase/ground fault occurs in
distribution systems, the Back-up Recloser operates timing counter by overcurrent elements.
During the count at the Back-up Recloser, if the distribution system is restored to normal by
TRIP with Down-line Recloser, the number of the trip operations of Back-up Recloser is
increased one step.
Back-up Recloser performs trip operation instead of activating Sequence Coordination feature at
the last sequence of the full sequence. If Auto Reclose switch is set to one TRIP, Sequence
Coordination function cannot be operated.
EVR 1
EVR 2
Faulted
Back Up
Down line
Close
Open
Close
Open
Time
Starting
Reset Time
Counter
Increase Trip Counter without Trip
Lockout Status
Figure 7-11. Sequence Coordination Operation Block Diagram
7.17.2. Other Element
PRIMARY SETTING / PROTECTION / OTHER ELEMENT / L.O Priority
Range
PHA, GND
Default
GND
Step
~
Lockout priority
PHA : Phase prior
GND : Ground prior
[OTHER ELEMENT]
Seq’ Coordi’: OFF
>L.O Priority: GND
F/I Reset: AUTO
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