Sel SEL-421 - Relay Word Bits: DC Supply Monitor; Relay Word Bits: Metering Elements; Relay Word Bits: Open and Close Command

R.A.40
SEL-421 Relay Reference Manual Date Code 20111215
Relay Word Bits
Row List
83 RTD03ST RTD Status for Channel 3
83 RTD02ST RTD Status for Channel 2
83 RTD01ST RTD Status for Channel 1
84 RTDIN State of RTD contact input
84 RTDCOMF RTD Communication Failure
84 RTDFL RTD device Failure
84 * Reserved
84 RTD12ST RTD Status for Channel 12
84 RTD11ST RTD Status for Channel 11
84 RTD10ST RTD Status for Channel 10
84 RTD09ST RTD Status for Channel 9
Table A.18 Relay Word Bits: DC Supply Monitor
Row Name Description
85 DC1F DC Monitor 1 fail alarm
85 DC1W DC Monitor 1 warning alarm
85 DC1G DC Monitor 1 ground fault alarm
85 DC1R DC Monitor 1 alarm for ac ripple
85 DC2F DC Monitor 2 fail alarm
85 DC2W DC Monitor 2 warning alarm
85 DC2G DC Monitor 2 ground fault alarm
85 DC2R DC Monitor 2 alarm for ac ripple
Table A.19 Relay Word Bits: Metering Elements
Row Name Description
86 PDEM Phase current demand picked up
86 QDEM Negative-sequence demand current picked up
86 GDEM Zero-sequence demand current picked up
86 * Reserved
86 * Reserved
86 * Reserved
86 * Reserved
86 * Reserved
Table A.20 Relay Word Bits: Open and Close Command (Sheet 1 of 2)
Row Name Description
87 CC2 Circuit Breaker 2 close command
87 OC2 Circuit Breaker 2 open command
87 CC1 Circuit Breaker 1 close command
87 OC1 Circuit Breaker 1 open command
87 * Reserved
Table A.17 Relay Word Bits: RTD Status (Sheet 2 of 2)
Row Name Description