11.35
Date Code 20171021 Instruction Manual SEL-421 Relay
Relay Word Bits
Row Lists
3 VMEMC Polarizing memory voltage control
3* Reserved
4 Z1PT–Z5PT Zone 1–Zone 5 phase-distance, time-delayed
4* Reserved
4* Reserved
4* Reserved
5 Z1G–Z5G Zone 1–Zone 5 ground-distance element
5* Reserved
5* Reserved
5* Reserved
6 Z1GT–Z5GT Zone 1–Zone 5 ground-distance, time-delayed
6* Reserved
6* Reserved
6* Reserved
7 Z1T–Z5T Zone 1–Zone 5 phase- or ground-distance, time-delayed
7* Reserved
7* Reserved
7* Reserved
8 MAB1 Zone 1 Mho A-B phase element
8 MBC1 Zone 1 Mho B-C phase element
8 MCA1 Zone 1 Mho C-A phase element
8* Reserved
8 MAB2 Zone 2 Mho A-B phase element
8 MBC2 Zone 2 Mho B-C phase element
8 MCA2 Zone 2 Mho C-A phase element
8* Reserved
9 MAB3 Zone 3 Mho A-B phase element
9 MBC3 Zone 3 Mho B-C phase element
9 MCA3 Zone 3 Mho C-A phase element
9* Reserved
9 MAB4 Zone 4 Mho A-B phase element
9 MBC4 Zone 4 Mho B-C phase element
9 MCA4 Zone 4 Mho C-A phase element
9* Reserved
10 MAB5 Zone 5 Mho A-B phase element
10 MBC5 Zone 5 Mho B-C phase element
10 MCA5 Zone 5 Mho C-A phase element
10 * Reserved
10 XAB1 Zone 1 quad A-B phase element
10 XBC1 Zone 1 quad B-C phase element
10 XCA1 Zone 1 quad C-A phase element
Table 11.3 Relay Word Bits: Distance Elements (Sheet 2 of 4)
Row Name Description
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