Sel SEL-421 - Synchrophasor Trigger SEL

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R.A.74

SEL-421 Relay Reference Manual Date Code 20111215

Relay Word Bits

Row List

264 MBC2H High-speed Zone 2 Mho B-C phase element

264 MAB2H High-speed Zone 2 Mho A-B phase element

264 MCA1H High-speed Zone 1 Mho C-A phase element

264 MBC1H High-speed Zone 1 Mho B-C phase element

264 MAB1H High-speed Zone 1 Mho A-B phase element

265 * Reserved

265 MCA3H High-speed Zone 3 Mho C-A phase element

266–

267

* Reserved

Not in SEL-421-1 nor SEL-421-2.

Table A.49 Synchrophasor Trigger SELOGIC Equations/RTC Synchrophasor

Status Bits

(Sheet 1 of 2)

Row Bit Name Description

268 PMTRIG Trigger (SELOGIC control equation)

268 TREA4 Trigger Reason Bit 4 (SEL

OGIC Equation)

268 TREA3 Trigger Reason Bit 3 (SEL

OGIC Equation)

268 TREA2 Trigger Reason Bit 2 (SEL

OGIC Equation)

268 TREA1 Trigger Reason Bit 1 (SEL

OGIC Equation)

268 * Reserved

269 * Reserved

270 EVELOCK Lock DNP Events

270 * Reserved

270 RTCCFGB RTC Configuration Complete, Channel B

Table A.48 Relay Word Bits: High-Speed Distance Elements

(Sheet 2 of 2)

Row Bit Name Description

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