Schweitzer Engineering Laboratories SEL-751 - Page 883

K.13
Date Code 20170927 Instruction Manual SEL-751 Relay
Relay Word Bits
Definitions
AIHW2 Analog inputs high warning, Level 2. If any AIxxxHW2 = 1, then AIHW2 = 1.
67
AILAL Analog inputs low alarm limit. If any AIxxxLAL = 1, then AILAL = 1.
67
AILW1 Analog inputs low warning, Level 1. If any AIxxxLW1 = 1, then AILW1 = 1.
67
AILW2 Analog inputs low warning, Level 2. If any AIxxxLW2 = 1, then AILW2 = 1.
67
AMBALRM Ambient temperature alarm. AMBALRM asserts if the healthy ambient RTD temperature
exceeds its alarm set point.
12
AMBTRIP Ambient temperature trip. AMBTRIP asserts when the healthy ambient RTD temperature
exceeds its trip set point.
12
BCW BCWA + BCWB + BCWC
113
BCWA A-phase breaker contact wear has reached the 100 percent wear level
113
BCWB B-phase breaker contact wear has reached the 100 percent wear level
113
BCWC C-phase breaker contact wear has reached the 100 percent wear level
113
BFI Breaker failure initiation. Asserts when the SEL
OGIC control equation BFI results in a
logical 1. Use to indicate that the breaker failure logic has started.
12
BFT Asserts when the relay issues a breaker failure trip.
12
BKJMP Asserts if breaker control jumper is installed on main board
12
BKMON Breaker monitor initiation
12
BRGALRM Bearing temperature alarm BRGALRM asserts when any healthy bearing RTD temperature
exceeds its alarm set point
25
BRGTRIP Bearing temperature trip BRGTRIP asserts when one or two (when EBRGV = Y) healthy
bearing RTD temperatures exceed their trip set points
25
CBADA Channel A, channel unavailability over threshold
96
CBADB Channel B, channel unavailability over threshold
96
CC Close command
33
CF Close condition failure (asserts for ¼ cycle)
31
CFGFLT Asserts on failed settings interdependency check during Modbus settings change
14
CL CL Close SEL
OGIC equation
38
CLOSE Initiates closing action when asserted
31
COMMFLT Time-out of internal communication between CPU board and DeviceNet board
14
COMMIDLE DeviceNet card in programming mode
14
COMMLOSS DeviceNet communication failure
14
DCHI Station dc battery instantaneous overvoltage element
114
DCLO Station dc battery instantaneous undervoltage element
114
DDNA A-phase tuning threshold decrease
138
DDNB B-phase tuning threshold decrease
138
DDNC C-phase tuning threshold decrease
138
DI_A A-phase distortion index
32
Table K.2 Relay Word Bit Definitions for the SEL-751 Relay (Sheet 8 of 17)
Bit Definition Row