12.21
Date Code 20171021 Instruction Manual SEL-421 Relay
Analog Quantities
IASPMM, IBSPMM,
ICSPMM
Synchrophasor current magnitude, Terminal S Amperes [A] (primary)
IAWPMA, IBWPMA,
ICWPMA
Synchrophasor current angle, Terminal W Degrees [°] (±180)
IAXPMA, IBXPMA,
ICXPMA
Synchrophasor current angle, Terminal X Degrees [°] (±180)
IASPMA, IBSPMA,
ICSPMA
Synchrophasor current angle, Terminal S Degrees [°] (±180)
IAWPMR, IBWPMR,
ICWPMR
Synchrophasor current real component, Terminal W Amperes [A] (primary)
IAXPMR, IBXPMR,
ICXPMR
Synchrophasor current real component, Terminal X Amperes [A] (primary)
IASPMR, IBSPMR,
ICSPMR
Synchrophasor current real component, Terminal S Amperes [A] (primary)
IAWPMI, IBWPMI,
ICWPMI
Synchrophasor current imaginary component, Terminal W Amperes [A] (primary)
IAXPMI, IBXPMI, ICXPMI Synchrophasor current imaginary component, Terminal X Amperes [A] (primary)
IASPMI, IBSPMI, ICSPMI Synchrophasor current imaginary component, Terminal S Amperes [A] (primary)
I1WPMM Positive-sequence synchrophasor current magnitude, Terminal W Amperes [A] (primary)
I1XPMM Positive-sequence synchrophasor current magnitude, Terminal X Amperes [A] (primary)
I1SPMM Positive-sequence synchrophasor current magnitude, Terminal S Amperes [A] (primary)
I1WPMA Positive-sequence synchrophasor current angle, Terminal W Degrees [°] (±180)
I1XPMA Positive-sequence synchrophasor current angle, Terminal X Degrees [°] (±180)
I1SPMA Positive-sequence synchrophasor current angle, Terminal S Degrees [°] (±180)
I1WPMR Positive-sequence synchrophasor current real component,
Terminal W
Amperes [A] (primary)
I1XPMR Positive-sequence synchrophasor current real component,
Terminal X
Amperes [A] (primary)
I1SPMR Positive-sequence synchrophasor current real component,
Terminal S
Amperes [A] (primary)
I1WPMI Positive-sequence synchrophasor current imaginary component,
Terminal W
Amperes [A] (primary)
I1XPMI Positive-sequence synchrophasor current imaginary component, Ter-
minal X
Amperes [A] (primary)
I1SPMI Positive-sequence synchrophasor current imaginary component,
Terminal S
Amperes [A] (primary)
SODPM Second of day of the synchrophasor data packet Seconds [s]
FOSPM Fraction of second of the synchrophasor data packet Seconds [s]
Synchrophasor Frequency
FREQPM Frequency for synchrophasor data Hertz [Hz]
DFDTPM Rate-of-change of frequency for synchrophasor data Hertz/seconds [Hz/s]
Synchrophasor RTC
VAYPMMD, VBYPMMD,
VCYPMMD
Synchrophasor voltage magnitude, Terminal Y, delayed for RTC
alignment
Kilo Volts [kV] (primary)
VAZPMMD, VBZPMMD,
VCZPMMD
Synchrophasor voltage magnitude, Terminal Z, delayed for RTC
alignment
Kilo Volts [kV] (primary)
Table 12.2 Analog Quantities Sorted by Function (Sheet 10 of 13)
Labels Description Unit
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