Schweitzer Engineering Laboratories SEL-421-4 - Table 11.4 Relay Word Bits: Series-Compensated Line Logic

11.37
Date Code 20171021 Instruction Manual SEL-421 Relay
Relay Word Bits
Row Lists
16 XAG1 Zone 1 quad A-Phase-to-ground element
16 XBG1 Zone 1 quad B-Phase-to-ground element
16 XCG1 Zone 1 quad C-Phase-to-ground element
16 * Reserved
16 XAG2 Zone 2 quad A-Phase-to-ground element
16 XBG2 Zone 2 quad B-Phase-to-ground element
16 XCG2 Zone 2 quad C-Phase-to-ground element
16 * Reserved
17 XAG3 Zone 3 quad A-Phase-to-ground element
17 XBG3 Zone 3 quad B-Phase-to-ground element
17 XCG3 Zone 3 quad C-Phase-to-ground element
17 * Reserved
17 XAG4 Zone 4 quad A-Phase-to-ground element
17 XBG4 Zone 4 quad B-Phase-to-ground element
17 XCG4 Zone 4 quad C-Phase-to-ground element
17 * Reserved
18 XAG5 Zone 5 quad A-Phase-to-ground element
18 XBG5 Zone 5 quad B-Phase-to-ground element
18 XCG5 Zone 5 quad C-Phase-to-ground element
18 CVTBLH CCVT transient blocking logic active—high-speed elements
Note: The SEL-421-4 does not provide high-speed distance elements, so the CVTBLH Relay Word bit is unavailable.
18 CVTBL CCVT transient blocking logic active
18 VPOLV Polarizing voltage valid
18 M1P–M2P Zone 1–2 Mho phase-distance element
19 M3P–M5P Zone 3-5 Mho phase-distance element
19 M1PT–M5PT Zone 1–5 Mho phase-distance, time-delayed
Table 11.4 Relay Word Bits: Series-Compensated Line Logic
Row Name Description
20 SERCAB Series-compensated line AB-Phase output
20 SERCBC Series-compensated line BC-Phase output
20 SERCCA Series-compensated line CA-Phase output
20 SERCA Series-compensated line A-Phase output
20 SERCB Series-compensated line B-Phase output
20 SERCC Series-compensated line C-Phase output
20 * Reserved
20 * Reserved
Table 11.3 Relay Word Bits: Distance Elements (Sheet 4 of 4)
Row Name Description