9328900990 Rev L BE1-951 Application i
SECTION 8 • APPLICATION
TABLE OF CONTENTS
SECTION 8 • APPLICATION.................................................................................................................... 8-1
INTRODUCTION.................................................................................................................................... 8-1
EXPLANATION OF TERMS .................................................................................................................. 8-1
OVERVIEW OF PREPROGRAMMED LOGIC SCHEMES ................................................................... 8-1
BASIC-OC Logic Scheme (Basic Overcurrent Protection) ................................................................ 8-1
OC-W-79 Logic Scheme (Overcurrent Protection with Reclosing) .................................................... 8-2
OC-W-CTL Logic Scheme (Overcurrent Protection with Control)...................................................... 8-2
FDR-W-IL Logic Scheme (Feeder Protection with Interlock)............................................................. 8-2
BUS Logic Scheme ............................................................................................................................ 8-2
BACKUP Logic Scheme..................................................................................................................... 8-2
DETAILS OF PREPROGRAMMED LOGIC SCHEMES........................................................................ 8-2
BASIC-OC LOGIC SCHEME................................................................................................................. 8-2
Operation - Protection ........................................................................................................................ 8-3
Operation - Setting Group Selection .................................................................................................. 8-3
Operation - Alarms ............................................................................................................................. 8-3
BASIC-OC Logic Settings and Equations .......................................................................................... 8-8
OC-W-79 LOGIC SCHEME ................................................................................................................... 8-8
Operation - Protection ........................................................................................................................ 8-9
Operation - Reclosing......................................................................................................................... 8-9
Operation - Setting Group Selection .................................................................................................. 8-9
Operation - Alarms ............................................................................................................................. 8-9
OC-W-79 Logic Settings and Equations (Overcurrent with Reclosing)............................................ 8-15
OC-W-CTL LOGIC SCHEME .............................................................................................................. 8-15
Operation - Control........................................................................................................................... 8-16
Operation - Protection ...................................................................................................................... 8-16
Operation - Reclosing....................................................................................................................... 8-16
Operation - Setting Group Selection ................................................................................................ 8-16
Operation - Alarms ........................................................................................................................... 8-16
OC-W-CTL Logic Settings and Equations........................................................................................ 8-22
FDR-W-IL LOGIC SCHEME ................................................................................................................ 8-22
Normal Operation - Control .............................................................................................................. 8-23
Normal Operation - Protection.......................................................................................................... 8-23
Normal Operation - Reclosing.......................................................................................................... 8-23
Normal Operation - Setting Group Selection.................................................................................... 8-23
Normal Operation - Bus Protection .................................................................................................. 8-23
Normal Operation - Alarms............................................................................................................... 8-24
Contingency Operation - Test Mode ................................................................................................ 8-24
Contingency Operation - Backup Protection for Feeder Breaker Failure ........................................ 8-24
Contingency Operation - Backup Protection for Feeder Relay Out-of-Service................................ 8-24
FDR-W-IL Logic Settings and Equations .........................................................................................8-31
BUS AND BACKUP LOGIC SCHEMES.............................................................................................. 8-31
Normal Operation - Control .............................................................................................................. 8-32
Normal Operation - Bus Protection .................................................................................................. 8-33
Normal Operation - Setting Group Selection.................................................................................... 8-33
Normal Operation - Alarms............................................................................................................... 8-33
Contingency Operation - Test Mode ................................................................................................ 8-33
Contingency Operation - Backup Protection for Bus Breaker Failure.............................................. 8-33
Contingency Operation - Backup Protection for BACKUP Relay Out of Service............................. 8-34
Contingency Operation - Backup Protection for Feeder Relay Out of Service................................ 8-34
BUS Logic Settings and Equations .................................................................................................. 8-40
BACKUP Logic Settings and Equations........................................................................................... 8-46
MISCELLANEOUS LOGIC EXPRESSIONS ....................................................................................... 8-46
APPLICATION TIPS ............................................................................................................................ 8-47
Trip Circuit and Voltage Monitor....................................................................................................... 8-47
Output Contact Latch using the TRSTKEY Logic Variable.............................................................. 8-48
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