V03396
Protection Trip
AR in Progress
CB Open
Dead Time
Auto-close
Reclaim Time
Autoreclose Lockout
Successful Autoreclose
Figure 133: Autoreclose sequence for an evolving or permanent fault
3.4.3
AR TIMING SEQUENCE - EVOLVING/PERMANENT FAULT SINGLE-PHASE
If the Autorecloser is set for single-phase operation, then single phase operation is only allowed on the first shot.
Subsequent tripping will be three-phase only until the AR has been successful or until AR has locked out as shown
in the figure below.
V03397
Protection Trip
AR in Progress
CB Open
Dead Time
Auto-close
Reclaim Time
Autoreclose Lockout
Successful Autoreclose
1-ph 3-ph
Figure 134: Autoreclose sequence for an evolving or permanent fault - single-phase operation
3.4.4
AR TIMING SEQUENCE - TRANSIENT FAULT DUAL CB
The figure below describes the operating sequence for a single-shot on a dual CB (2CB) Autorecloser for a transient
fault that clears when the faulted line is isolated.
P446SV Chapter 11 - Autoreclose
P446SV-TM-EN-1 257
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