Schweitzer Engineering Laboratories SEL-421-4 - Page 711

12.15
Date Code 20171021 Instruction Manual SEL-421 Relay
Analog Quantities
VAYFA, VBYFA, VCYFA A-Phase, B-Phase, C-Phase, Terminal Y, filtered voltage, angle Degrees [°] (±180°)
VAZFA, VBZFA, VCZFA A-Phase, B-Phase, C-Phase, Terminal Z, filtered voltage, angle Degrees [°] (±180°)
IA1WFA Terminal W, positive-sequence filtered current, angle Degrees [°] (±180°)
IA1XFA Terminal X, positive-sequence filtered current, angle Degrees [°] (±180°)
VA1YFA Terminal Y, positive-sequence filtered voltage, angle Degrees [°] (±180°)
VA1ZFA Terminal Z, positive-sequence filtered voltage, angle Degrees [°] (±180°)
3IA2WFA Terminal W, negative-sequence filtered current, angle Degrees [°] (±180°)
3IA2XFA Terminal X, negative-sequence filtered current, angle Degrees [°] (±180°)
3VA2YFA Terminal Y, negative-sequence filtered voltage, angle Degrees [°] (±180°)
3VA2ZFA Terminal Z, negative-sequence filtered voltage, angle Degrees [°] (±180°)
3I0WFA Terminal W, zero-sequence filtered current, angle Degrees [°] (±180°)
3I0XFA Terminal X, zero-sequence filtered current, angle Degrees [°] (±180°)
3V0YFA Terminal Y, zero-sequence filtered voltage, angle Degrees [°] (±180°)
3V0ZFA Terminal Z, zero-sequence filtered voltage, angle Degrees [°] (±180°)
Current and Potential Transformer Ratios
CTRW Current transformer ratio, Terminal W N/A
CTRX Current transformer ratio, Terminal X N/A
PTRY Y-Potential transformer ratio setting (divided by 1000) N/A
PTRZ Z-Potential transformer ratio setting (divided by 1000) N/A
Instantaneous Currents and Voltages (Before Source Selection)
IAWM, IBWM, ICWM Filtered instantaneous current magnitude, Terminal W Amperes [A] (secondary)
IAXM, IBXM, ICXM Filtered instantaneous current magnitude, Terminal X Amperes [A] (secondary)
VAYM, VBYM, VCYM Filtered instantaneous voltage magnitude, Terminal Y Volts [V] (secondary)
VAZM, VBZM, VCZM Filtered instantaneous voltage magnitude, Terminal Z Volts [V] (secondary)
10-Cycle Averaged Fundamental Current and Voltage Magnitudes
LIAFM, LIBFM, LICFM 10-cycle average fundamental current magnitude (line) Amperes [A] (primary)
LIAFA, LIBFA, LICFA 10-cycle average fundamental current angle (line) Degrees [°] (±180)
LIARMS, LIBRMS,
LICRMS
10-cycle average rms current (line) Amperes [A] (primary)
LI1M 10-cycle average positive-sequence current magnitude (line) Amperes [A] (primary)
LI1A 10-cycle average positive-sequence current angle (line) Degrees [°] (±180)
L3I2M 10-cycle average negative-sequence current magnitude (line) Amperes [A] (primary)
L3I2A 10-cycle average negative-sequence current angle (line) Degrees [°] (±180)
LIGM 10-cycle average zero-sequence current magnitude (line) Amperes [A] (primary)
LIGA 10-cycle average zero-sequence current angle (line) Degrees [°] (±180)
B1IAFM, B1IBFM,
B1ICFM
10-cycle average fundamental phase current magnitude (Breaker 1) Amperes [A] (primary)
B2IAFM, B2IBFM,
B2ICFM
10-cycle average fundamental phase current magnitude (Breaker 2) Amperes [A] (primary)
B1IAFA, B1IBFA, B1ICFA 10-cycle average fundamental phase current angle (Breaker 1) Degrees [°] (±180)
B21IAFA, B21IBFA,
B2ICFA
10-cycle average fundamental phase current angle (Breaker 2) Degrees [°] (±180)
Table 12.2 Analog Quantities Sorted by Function (Sheet 4 of 13)
Labels Description Unit