I.L. 40-386.12
2-8
2
When a reclosing sequence is initiated for any of the above conditions, the recloser goes
through different stages; Recloser dead time countdown, waiting for synchronism/HBDL/HLDB
(if selected with the sync-check option), closing of contacts and reset. If in the reset phase the
condition to initiate the next reclosure appears, the recloser proceeds to the next reclosure. Oth-
erwise, at the end of the reset time, the recloser returns to READY state, which marks the end
of the sequence.
The sequence can also end in the LOCKOUT state for any of the reasons explained in Section
2.5.6 (Lockout Mode).
During the reclosing sequence, the different stages are displayed with the corresponding count-
downs and set timers.
2. 7 TIMING DIAGRAM FOR A TYPICAL RECLOSING SYNC-CHECK SEQUENCE
Timing Diagram showing a typical Reclosing/Sync-check sequence according to the following
enabled settings and conditions.
NOTE: In the example below, 2 reclosures were selected: Reclosure 1 (Recl 1) was initiated by
3RI only. Reclosure 2 (Recl 2) was initiated by 52b only with HLDB condition enabled and
a Recl 2 Wait Time set indefinitely, i.e., “No Time Limit”.
52b or 3RI Either signals will initiate a new reclo-
sure.
Internal 3RI or External RI
Relevant Settings for this example:
Sync Set ? Yes Recl 2 52b Only
Sync Time 2.0 Sec Recl2 HLDB Yes
Recl 1 3RI Only Recl2 HBDL No
Recl1 HLDB No Recl2 Sync No
Recl1 HBDL No Recl2 Wait No Time Limit
Recl1 Sync No
Table 2-5:
3RI
52b
Close
HLDB
Sync Time
Recl 1
Reset
Recl 2
Wait Time
Reset
Ready
Ready
Trip
Relay
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