K.9
Date Code 20170927 Instruction Manual SEL-751 Relay
Relay Word Bits
Definitions
51P1T Level 1 maximum phase time-overcurrent element trip
7
51P2P Level 2 maximum phase time-overcurrent element pickup
6
51P2R Level 2 maximum phase time-overcurrent element reset
8
51P2T Level 2 maximum phase time-overcurrent element trip
7
51QP Negative-sequence time-overcurrent element pickup
6
51QR Negative-sequence time-overcurrent element reset
8
51QT Negative-sequence time-overcurrent element trip
7
52A Circuit breaker N/O contact
1
52B Circuit breaker N/C contact
145
55A Power factor alarm
11
55T Power factor trip
11
59G1 Level 1 zero-sequence instantaneous overvoltage element pickup
118
59G1T Level 1 zero-sequence instantaneous overvoltage element trip
118
59G2 Level 2 zero-sequence instantaneous overvoltage element pickup
118
59G2T Level 2 zero-sequence instantaneous overvoltage element trip
118
59I1 Level 1 inverse overvoltage element pickup
156
59I1RS Level 1 inverse overvoltage element reset
156
59I1T Level 1 inverse overvoltage element time out
156
59I2 Level 2 inverse overvoltage element pickup
156
59I2RS Level 2 inverse overvoltage element reset
156
59I2T Level 2 inverse overvoltage element time out
156
59I3 Level 3 inverse overvoltage element pickup
157
59I3RS Level 3 inverse overvoltage element reset
157
59I3T Level 3 inverse overvoltage element time out
157
59I4 Level 4 inverse overvoltage element pickup
157
59I4RS Level 4 inverse overvoltage element reset
157
59I4T Level 4 inverse overvoltage element time out
157
59P1 Level 1 phase overvoltage element pickup
10
59P1T Level 1 phase overvoltage element trip
10
59P2 Level 2 phase overvoltage element pickup
10
59P2T Level 2 phase overvoltage element trip
10
59PP1 Level 1 phase-to-phase overvoltage element pickup
121
59PP1T Level 1 phase-to-phase overvoltage element trip
121
59PP2 Level 2 phase-to-phase overvoltage element pickup
121
Table K.2 Relay Word Bit Definitions for the SEL-751 Relay (Sheet 4 of 17)
Bit Definition Row
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