10.6
SEL-421 Relay Instruction Manual Date Code 20171021
Communications Interfaces
Communications Database
The STATUS region contains complete relay status information. This region is
updated every 5 seconds. See Table 10.8 for the Map.
Table 10.7 SEL-421 Database Structure—BREAKER Region
Address
(Hex)
Name Type Description
5000 _YEAR int Four-digit year when data were sampled
5001 DAY_OF_YEAR int 1–366 day when data were sampled
5002 TIME(ms) long int Time of day in ms when data were sampled
(0–86,400,000)
5004 BCWA1 float Breaker 1 A-Phase breaker wear (%)
5006 BCWB1 float Breaker 1 B-Phase breaker wear (%)
5008 BCWC1 float Breaker 1 C-Phase breaker wear (%)
500A BCWA2 float Breaker 2 A-Phase breaker wear (%)
500C BCWB2 float Breaker 2 B-Phase breaker wear (%)
500E BCWC2 float Breaker 2 C-Phase breaker wear (%)
5010 CURA1 float Breaker 1 A-Phase accumulated current (kA)
5012 CURB1 float Breaker 1 B-Phase accumulated current (kA)
5014 CURC1 float Breaker 1 C-Phase accumulated current (kA)
5016 CURA2 float Breaker 2 A-Phase accumulated current (kA)
5018 CURB2 float Breaker 2 B-Phase accumulated current (kA)
501A CURC2 float Breaker 2 C-Phase accumulated current (kA)
501C NOPA1 long int Breaker 1 A-Phase number of operations
501E NOPB1 long int Breaker 1 B-Phase number of operations
5020 NOPC1 long int Breaker 1 C-Phase number of operations
5022 NOPA2 long int Breaker 2 A-Phase number of operations
5024 NOPB2 long int Breaker 2 B-Phase number of operations
5026 NOPC2 long int Breaker 2 C-Phase number of operations
Table 10.8 SEL-421 Database Structure—STATUS Region (Sheet 1 of 2)
Address
(Hex)
Name Type Description
6000 _YEAR int Four-digit year when data were sampled
6001 DAY_OF_YEAR int 1–366 day when data were sampled
6002 TIME(ms) long int Time of day in ms when data were sampled
(0–86,400,000)
6004 CH1(mV) int Channel 1 offset
6005 CH2(mV) int Channel 2 offset
6006 CH3(mV) int Channel 3 offset
6007 CH4(mV) int Channel 4 offset
6008 CH5(mV) int Channel 5 offset
6009 CH6(mV) int Channel 6 offset
600A CH7(mV) int Channel 7 offset
600B CH8(mV) int Channel 8 offset
600C CH9(mV) int Channel 9 offset