10.22
SEL-421 Relay Instruction Manual Date Code 20171021
Communications Interfaces
IEC 61850 Communication
IEC 61850 Communication
General IEC 61850 operation is described in Section 17: IEC 61850 Communica-
tion in the SEL-400 Series Relays Instruction Manual. This section describes
characteristics of IEC 61850 that are specific to the SEL-421.
Logical Nodes
Table 10.15–Table 10.16 show the logical nodes (LNs) supported in the SEL-421
and the Relay Word bits or Measured Values mapped to those LNs. Additionally,
the relay supports the CON and ANN Logical Device logical nodes as described
in Section 17: IEC 61850 Communication in the SEL-400 Series Relays Instruc-
tion Manual.
Table 10.15 shows the LNs associated with protection elements, defined as Logi-
cal Device PRO.
Analog Outputs
40, 41 0 ACTGRP Active settings group
a
The counters use 1 as default or per point Counter dead-band setting for the actual counter dead band.
b
Convert the absolute value to force the counter to a positive value.
Table 10.14 SEL-421 DNP3 Default Data Map (Sheet 7 of 7)
Object Default Index Label Description
Table 10.15 Logical Device: PRO (Protection) (Sheet 1 of 6)
Logical Node Attribute Data Source Comment
Functional Constraint = CO
BKR1CSWI1 Pos.Oper.ctlVal CC1:OC1 Circuit Breaker 1 close/open command
BKR2CSWI2 Pos.Oper.ctlVal CC2:OC2 Circuit Breaker 2 close/open command
DC10CSWI10 Pos.Oper.ctlVal 89CC10:89OC10 ASCII Close/Open Disconnect 10 command
DC1CSWI1 Pos.Oper.ctlVal 89CC01:89OC01 ASCII Close/Open Disconnect 1 command
DC2CSWI2 Pos.Oper.ctlVal 89CC02:89OC02 ASCII Close/Open Disconnect 2 command
DC3CSWI3 Pos.Oper.ctlVal 89CC03:89OC03 ASCII Close/Open Disconnect 3 command
DC4CSWI4 Pos.Oper.ctlVal 89CC04:89OC04 ASCII Close/Open Disconnect 4 command
DC5CSWI5 Pos.Oper.ctlVal 89CC05:89OC05 ASCII Close/Open Disconnect 5 command
DC6CSWI6 Pos.Oper.ctlVal 89CC06:89OC06 ASCII Close/Open Disconnect 6 command
DC7CSWI7 Pos.Oper.ctlVal 89CC07:89OC07 ASCII Close/Open Disconnect 7 command
DC8CSWI8 Pos.Oper.ctlVal 89CC08:89OC08 ASCII Close/Open Disconnect 8 command
DC9CSWI9 Pos.Oper.ctlVal 89CC09:89OC09 ASCII Close/Open Disconnect 9 command
Functional Constraint = ST
BFR1RBRF1 OpEx.general FBF1
a
Circuit Breaker 1 circuit breaker failure
BFR1RBRF1 OpEx.phsA FBFA1
a
Circuit Breaker 1 A-Phase circuit breaker failure
BFR1RBRF1 OpEx.phsB FBFB1
a
Circuit Breaker 1 B-Phase circuit breaker failure
BFR1RBRF1 OpEx.phsC FBFC1
a
Circuit Breaker 1 C-Phase circuit breaker failure
BFR1RBRF1 OpIn.general RT1
a
Circuit Breaker 1 retrip
BFR1RBRF1 OpIn.phsA RTA1
a
Circuit Breaker 1 A-Phase retrip