ii BE1-951 Protection and Control 9328900990 Rev L
BREAKER FAILURE PROTECTION................................................................................................... 4-49
50BF - Breaker Failure Protection.................................................................................................... 4-49
BESTlogic Settings for Breaker Failure........................................................................................ 4-50
Operating Settings for Breaker Failure.........................................................................................4-52
Retrieving Breaker Failure Status from the Relay ........................................................................ 4-53
LOGIC TIMERS ...................................................................................................................................4-53
62 - General Purpose Logic Timers ................................................................................................. 4-53
Mode 1, PU/DO (Pickup/Dropout Timer)...................................................................................... 4-54
Mode 2, One-Shot Nonretriggerable Timer .................................................................................. 4-54
Mode 3, One-Shot Retriggerable Timer .......................................................................................4-54
Mode 4, Oscillator.........................................................................................................................4-55
Mode 5, Integrating Timer.............................................................................................................4-55
Mode 6, Latch............................................................................................................................... 4-56
BESTlogic Settings for 62/162 General Purpose Logic Timers....................................................4-56
Operating Settings for General Purpose Logic Timers................................................................. 4-58
Retrieving 62/162 Output Status Information from the Relay....................................................... 4-59
RECLOSING........................................................................................................................................ 4-59
Inputs and Outputs........................................................................................................................... 4-59
Reclose Initiate (RI) ...................................................................................................................... 4-59
Breaker Status (STATUS) ............................................................................................................ 4-60
Reclose Wait (WAIT) .................................................................................................................... 4-60
Drive to Lockout/Block Recloser (DTL/BLK)................................................................................. 4-60
Close (79C)................................................................................................................................... 4-60
Recloser Running (79RNG).......................................................................................................... 4-60
Lockout (79LO)............................................................................................................................. 4-60
Reset Timer (79RST).................................................................................................................... 4-60
Sequence Control Block (79SCB) ................................................................................................ 4-60
BESTlogic Settings for Reclosing..................................................................................................... 4-61
Operating Settings for Reclosing...................................................................................................... 4-62
Reclosing Fail Timer (79F) ...........................................................................................................4-63
Maximum Cycle Timer (MAX Cycle)............................................................................................. 4-63
Sequence Controlled Blocking (SCB)........................................................................................... 4-63
Zone-Sequence Coordination .......................................................................................................... 4-64
SYNCHRONISM-CHECK PROTECTION............................................................................................4-67
25 - Synchronism-Check Protection................................................................................................. 4-67
BESTlogic Settings for the Sync-Check Element......................................................................... 4-68
Operating Settings for Synchronism-Check .................................................................................4-69
25VM - Voltage Monitor.................................................................................................................... 4-70
VOLTAGE TRANSFORMER FUSE LOSS DETECTION.................................................................... 4-71
60FL - Fuse Loss Detection ............................................................................................................. 4-71
Fuse Loss Detection Blocking Settings ........................................................................................4-72
VIRTUAL LOCKOUT PROTECTION................................................................................................... 4-74
86 - Virtual Lockout Protection ......................................................................................................... 4-74
BESTlogic Settings for Virtual Lockout......................................................................................... 4-74
VIRTUAL SWITCHES.......................................................................................................................... 4-76
43 - Virtual Selector Switches ..........................................................................................................4-76
BESTlogic Settings for Virtual Selector Switches......................................................................... 4-76
Select Before Operate Control of Virtual Selector Switches ........................................................4-77
Retrieving Virtual Selector Switches Status from the Relay......................................................... 4-78
101 - Virtual Breaker Control Switch................................................................................................ 4-78
BESTlogic Settings for Virtual Breaker Control Switch ................................................................4-79
Select Before Operate Control of Virtual Breaker Control Switch................................................ 4-80
Retrieving Virtual Breaker Control Switch Status from the Relay................................................. 4-81
Figures
Figure 4-1. Setting Group Control Logic Block.......................................................................................... 4-2
Figure 4-2. BESTlogic Function Element Screen, Setting Group Selection.............................................. 4-3
Figure 4-3. Input Control Mode 1............................................................................................................... 4-4
Figure 4-4. Input Control Mode 2............................................................................................................... 4-5
Figure 4-5. Automatic Operation Based on Load Change ........................................................................ 4-6
Figure 4-6. Automatic Operation Based on Cold Load Pickup.................................................................. 4-7
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