12.12
SEL-421 Relay Instruction Manual Date Code 20171021
Analog Quantities
VAZPMRD, VBZPMRD,
VCZPMRD
Synchrophasor voltage real component, Terminal Z, delayed for RTC
alignment
Kilo Volts [kV] (primary)
VA Z Y P M I , V B Z P M I ,
VCZYPMI
Synchrophasor voltage imaginary component, Terminal Z Kilo Volts [kV] (primary)
VAZYPMR, VBZPMR,
VCZPMR
Synchrophasor voltage real component, Terminal Z Kilo Volts [kV] (primary)
VBYFA B-Phase, Terminal Y, filtered voltage, angle Degrees [°] (±180°)
VBYFI B-Phase, Terminal Y, filtered voltage, imaginary component Volts [V] (secondary)
VBYFM B-Phase, Terminal Y, filtered voltage, magnitude Volts [V] (secondary)
VBYFR B-Phase, Terminal Y, filtered voltage, real component Volts [V] (secondary)
VBZFA B-Phase, Terminal Z, filtered voltage, angle Degrees [°] (±180°)
VBZFI B-Phase, Terminal Z, filtered voltage, imaginary component Volts [V] (secondary)
VBZFM B-Phase, Terminal Z, filtered voltage, magnitude Volts [V] (secondary)
VBZFR B-Phase, Terminal Z, filtered voltage, real component Volts [V] (secondary)
VCYFA C-Phase, Terminal Y, filtered voltage, angle Degrees [°] (±180°)
VCYFI C-Phase, Terminal Y, filtered voltage, imaginary component Volts [V] (secondary)
VCYFM C-Phase, Terminal Y, filtered voltage, magnitude Volts [V] (secondary)
VCYFR C-Phase, Terminal Y, filtered voltage, real component Volts [V] (secondary)
VCZFA C-Phase, Terminal Z, filtered voltage, angle Degrees [°] (±180°)
VCZFI C-Phase, Terminal Z, filtered voltage, imaginary component Volts [V] (secondary)
VCZFM C-Phase, Terminal Z, filtered voltage, magnitude Volts [V] (secondary)
VCZFR C-Phase, Terminal Z, filtered voltage, real component Volts [V] (secondary)
VNMAXF Instantaneous filtered maximum phase-to-neutral voltage magnitude Volts [V] (secondary)
VNMINF Instantaneous filtered minimum phase-to-neutral voltage magnitude Volts [V] (secondary)
VPM VP voltage magnitude Volts [V] (secondary)
VPMAXF Instantaneous filtered maximum phase-to-phase voltage magnitude Volts [V] (secondary)
VPMINF Instantaneous filtered minimum phase-to-phase voltage magnitude Volts [V] (secondary)
Z1FA Positive-sequence instantaneous impedance angle Degrees [°] (±180)
Z1FM Positive-sequence instantaneous impedance magnitude Ohms [ohm] (secondary)
a
Measured value if the relay can track frequency, otherwise FREQ = nominal frequency setting NFREQ, and DFDT is undefined.
b
Copy of last value set by TEC command or DNP3.
Table 12.2 Analog Quantities Sorted by Function (Sheet 1 of 13)
Labels Description Unit
Instantaneous Currents and Voltages (After Source Selection)
LIAFIM, LIBFIM, LICFIM Filtered instantaneous phase current magnitude Amperes [A] (secondary)
LIMAXM Filtered instantaneous maximum phase current magnitude Amperes [A] (secondary)
IPFIM Filtered instantaneous polarizing current magnitude Amperes [A] (secondary)
B1IAFIM, B1IBFIM,
B1ICFIM
Breaker 1 filtered instantaneous phase current magnitude Amperes [A] (secondary)
B2IAFIM, B2IBFIM,
B2ICFIM
Breaker 2 filtered instantaneous phase current magnitude Amperes [A] (secondary)
Table 12.1 Analog Quantities Sorted Alphabetically (Sheet 12 of 12)
Label Description Unit
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