Schweitzer Engineering Laboratories SEL-751 - Table K.2 Relay Word Bit Definitions for the SEL-751 Relay

K.6
SEL-751 Relay Instruction Manual Date Code 20170927
Relay Word Bits
Definitions
Definitions
Table K.2 Relay Word Bit Definitions for the SEL-751 Relay (Sheet 1 of 17)
Bit Definition Row
25A1 Level 1 synchronism check element
114
25A2 Level 2 synchronism check element
114
27I1 Level 1 inverse undervoltage element pickup
155
27I1RS Level 1 inverse undervoltage element reset
155
27I1T Level 1 inverse undervoltage element time out
155
27I2 Level 2 inverse undervoltage element pickup
155
27I2RS Level 2 inverse undervoltage element reset
155
27I2T Level 2 inverse undervoltage element time out
155
27P1 Level 1 phase undervoltage element pickup
9
27P1T Level 2 phase undervoltage element trip
9
27P2 Level 2 phase undervoltage element pickup
10
27P2T Level 2 phase undervoltage element trip
10
27PP1 Level 1 phase-to-phase undervoltage element pickup
121
27PP1T Level 1 phase-to-phase undervoltage element trip
121
27PP2 Level 2 phase-to-phase undervoltage element pickup
121
27PP2T Level 2 phase-to-phase undervoltage element trip
121
27S1 Level 1 vs channel undervoltage element pickup
115
27S1T Level 1 vs channel undervoltage element with time delay
115
27S2 Level 2 vs channel undervoltage element pickup
115
27S2T Level 1 vs channel undervoltage element with time delay
115
3I2DEM Negative-sequence current demand pickup
113
3P27 Three-phase undervoltage pickup when all three phases are below 27P1P
10
3P59 Three-phase overvoltage pickup when all three phases are above 59P1P
10
3PH_A A-phase above three-phase event level
139
3PH_B B-phase above three-phase event level
139
3PH_C C-phase above three-phase event level
139
3PH_CLR Three-phase events cleared
139
3PH_EVE Three-phase event detection
132
3PWR1P Three-Phase Power Element 1 pickup
26
3PWR1T Three-Phase Power Element 1 trip
14
3PWR2P Three-Phase Power Element 2 pickup
26
3PWR2T Three-Phase Power Element 2 trip
14