P.17.32
SEL-411L Relay Protection Manual Date Code 20151029
Analog Quantities
Quantities Listed by Function
87I1LM 10-cycle averaged, aligned local positive-sequence current magnitude Per unit [pu]
87I1LA 10-cycle averaged, aligned local positive-sequence current angle Degrees [°] (±180°)
87I1R1M, 87I1R2M,
87I1R3M
10-cycle averaged, aligned remote Terminal 1, Terminal 2, Terminal 3
positive-sequence current magnitude
Per unit [pu]
87I1R1A, 87I1R2A,
87I1R3A
10-cycle averaged, aligned remote Terminal 1, Terminal 2, Terminal 3
positive-sequence current angle
Degrees [°] (±180°)
87IQLM 10-cycle averaged, aligned local negative-sequence current magnitude Per unit [pu]
87IQLA 10-cycle averaged, aligned local negative-sequence current angle Degrees [°] (±180°)
87IQR1M, 87IQR2M,
87IQR3M
10-cycle averaged, aligned remote Terminal 1, Terminal 2, Terminal 3
negative-sequence current magnitude
Per unit [pu]
87IQR1A, 87IQR2A,
87IQR3A
10-cycle averaged, aligned remote Terminal 1, Terminal 2,
Terminal 3, negative-sequence current angle
Degrees [°] (±180°)
87IGLM 10-cycle averaged, aligned local zero-sequence current magnitude Per unit [pu]
87IGLA 10-cycle averaged, aligned local zero-sequence current angle Degrees [°] (±180°)
87IGR1M, 87IGR2M,
87IGR3M
10-cycle averaged, aligned remote Terminal 1, Terminal 2, Terminal 3
zero-sequence current magnitude
Per unit [pu]
87IGR1A, 87IGR2A,
87IGR3A
10-cycle averaged, aligned remote Terminal 1, Terminal 2, Terminal 3
zero-sequence current angle
Degrees [°] (±180°)
87IADM, 87IBDM,
87ICDM
10-cycle averaged, differential current, A-phase, B-phase, C-phase
magnitude
Per unit [pu]
87IADA, 87IBDA, 87ICDA 10-cycle averaged, differential current, A-phase, B-phase, C-phase angle Degrees [°] (±180°)
87IQDM 10-cycle averaged, differential negative-sequence current magnitude Per unit [pu]
87IQDA 10-cycle averaged, differential negative-sequence current angle Degrees [°] (±180°)
87IGDM 10-cycle averaged, differential residual current magnitude Per unit [pu]
87IGDA 10-cycle averaged, differential zero-current angle Degrees [°] (±180°)
87KAM, 87KBM, 87KCM 10-cycle averaged, alpha quantity, A-phase, B-phase, C-phase magnitude Per unit [pu]
87KAA, 87KBA, 87KCA 10-cycle averaged, alpha quantity, A-phase, B-phase, C-phase angle Degrees [°] (±180°)
87KQM 10-cycle averaged, negative-sequence alpha quantity magnitude Per unit [pu]
87KQA 10-cycle averaged, negative-sequence alpha quantity angle Degrees [°] (±180°)
87KGM 10-cycle averaged, zero-sequence alpha quantity magnitude Per unit [pu]
87KGA 10-cycle averaged, zero-sequence alpha quantity angle Degrees [°] (±180°)
87CH1RT, 87CH2RT Measured round trip delay of Channel 1, Channel 2 (serial only) Milliseconds [ms]
87CH1AX, 87CH2AX Measured absolute value of the channel asymmetry for Channel 1,
Channel 2 (serial only)
Milliseconds [ms]
87CH1LX, 87CH2LX,
87CH3LX
Number of lost packets among the 10,000 scheduled packets for
Channel 1, Channel 2, Channel 3
NA
87CH1LD, 87CH2LD,
87CH3LD
Number of lost 87L communication packets for the last 24 hours for
Channel 1, Channel 2, Channel 3
NA
87l Channel Status
DIA1W Terminal W positive-sequence (I1) current phasor 1-cycle difference,
magnitude
Per unit [pu]
DI0W Terminal W zero-sequence (I0) current phasor 1-cycle difference,
magnitude
Per unit [pu]
DIA1X Terminal X positive-sequence (I1) current phasor 1-cycle difference,
magnitude
Per unit [pu]
Table 17.2 Analog Quantities List By Function (Sheet 14 of 15)
Analog Quantities Analog Quantity Description Units
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