Basler Electric BE1-851 - Manual (Page 90)

Figure 4-37. BESTlogic Function Element Screen, Reclosing (Zone Sequence Logic)
Table 4-17 summarizes the settings for Zone-Sequence Coordination.
Table 4-17. Settings for Zone-Sequence Coordination
Function Range/Purpose
Zone Pickup Logic
The zone sequence pickup logic defines which
logic elements should be considered zone
sequence pickups. Only OR (+) logic can be used –
no AND (∗) variables may be used.
Recloser zone-sequence coordination detects when a downstream recloser has cleared a fault and
increments the upstream 79 automatic reclose count to maintain a consistent count with the other
recloser. A fault is presumed cleared downstream when one or more protective functions pickup and
dropout with no trip occurring. If the zone pickup logic becomes TRUE and then FALSE without a trip
output operating, then the 79 automatic reclose counter should be incremented. The Max Cycle timer
resets the shot counter.
Retrieving Reclosing Status from the Relay
The status of each logic variable can be determined through the ASCII command interface using the RG-
STAT (report general-status) command. See Section 6, Reporting and Alarms, General Status Reporting,
for more information. The status cannot be determined using BESTCOMS.
Figure 4-38 (next page) illustrates an overall logic diagram for Reclosing.
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