Schweitzer Engineering Laboratories SEL-421-4 - Page 714

12.18
SEL-421 Relay Instruction Manual Date Code 20171021
Analog Quantities
3MWHIN Negative (import) three-phase energy, Megawatt-hours Megawatt-hour [MWh] (primary)
3MWH3T Total three-phase energy; Megawatt-hours Megawatt-hour [MWh] (primary)
MHO Calculations
MAGZ1, MBGZ1, MCGZ1 Zone 1 mho ground impedance calculation Ohms (secondary)
MAGF, MBGF, MCGF Forward mho ground calculation (excludes Zone 1) Ohms (secondary)
MAGR, MBGR, MCGR Reverse mho ground calculation (all reverse zones) Ohms (secondary)
MAB, MBC, MCA Mho phase-to-phase impedance calculation Ohms (secondary)
MIRRORED BITS
MB1A–MB7A Channel A received MIRRORED BITS analog values N/A
MB1B–MB7B Channel B received M
IRRORED BITS analog values N/A
Programming
PMV01–PMV64 Protection SELOGIC math variable N/A
PCT01–PCT32 Protection SEL
OGIC conditioning timer pickup time Cycles
PCT01DO–PCT32DO Protection SEL
OGIC conditioning timer dropout time Cycles
PST01ET–PST32ET Protection SEL
OGIC sequencing timer elapsed time Cycles
PST01PT–PST32PT Protection SEL
OGIC sequencing timer preset time Cycles
PCN01CV–PCN32CV Protection SEL
OGIC counter current value N/A
PCN01PV–PCN32PV Protection SEL
OGIC counter preset value N/A
AMV001–AMV256 Automation SEL
OGIC math variable N/A
AST01ET–AST32ET Automation SEL
OGIC math sequencing timer elapsed time Seconds (s)
AST01PT–AST32PT Automation SEL
OGIC sequencing timer preset time Seconds (s)
ACN01CV–ACN32CV Automation SEL
OGIC counter current value N/A
ACN01PV–ACN32PV Automation SEL
OGIC counter preset value N/A
Active Group Setting
ACTGRP Active group setting N/A
Breaker Contact Wear
B1BCWPA, B1BCWPBA,
B1BCWPC
Breaker contact wear (Breaker 1) Percent
B2BCWPA, B2BCWPBA,
B2BCWPC
Breaker contact wear (Breaker 2) Percent
Time and Date Management
TODMS UTC time of day in milliseconds (0–86400000) Milliseconds (ms)
THR UTC time, hour (0–23) Hour (hr)
TMIN UTC time, minute (0–59) Minutes (min)
TSEC UTC time, seconds (0–59) Seconds (s)
TMSEC UTC time, milliseconds (0–999) Milliseconds (ms)
TNSEC UTC time, nanoseconds (0–999999) Nanoseconds (ns)
TLHR Local time, hour (0–23) Hour (hr)
TLMIN Local time, minute (0–59) Minutes (min)
TLMSEC Local time, millisecond (0–999) Milliseconds (ms)
TLNSEC Local time, nanoseconds (0–999999) Nanoseconds (ns)
TLODMS Local time of day in milliseconds (0–86400000) Milliseconds (ms)
Table 12.2 Analog Quantities Sorted by Function (Sheet 7 of 13)
Labels Description Unit