R.4.20
SEL-421 Relay Reference Manual Date Code 20111215
Communications Interfaces
Communications Card
Table 4.20 SEL-421 Communications Card Database Structure—METER
Region (Sheet 1 of 2)
Address
(Hex)
Name Type Description
1000 _YEAR int 4-digit year when data was sampled
1001 DAY_OF_YEAR int 1–366 day when data was sampled
1002 TIME(ms) long int Time of day in msec when data was
sampled (0–86,400,00)
1004 FREQ float System frequency
1006 VDC1 float Battery 1 voltage
1008 VDC2 float Battery 2 voltage
100A,
100C
IA1 float[2] Line phase A current magnitude and phase
100E,
1010
IB1 float[2] Line phase B current magnitude and phase
1012,
1014
IC1 float[2] Line phase C current magnitude and phase
1016,
1018
I0_1 float[2] Line Terminal W 0-sequence current magnitude
and phase
101A,
101C
I1_1 float[2] Line 1-sequence current magnitude and phase
101E,
1020
I2_1 float[2] Line 2-sequence current magnitude and phase
1022,
1024
IA2 float[2] Breaker 1 phase A current magnitude and phase
1026,
1028
IB2 float[2] Breaker 1 phase B current magnitude and phase
102A,
102C
IC2 float[2] Breaker 1 phase C current magnitude and phase
102E,
1030
IA3 float[2] Breaker 2 phase A current magnitude and phase
1032,
1034
IB3 float[2] Breaker 2 phase B current magnitude and phase
1036,
1038
IC3 float[2] Breaker 2 phase C current magnitude and phase
103A,
103C
VA float[2] phase A voltage magnitude and phase
103E,
1040
VB float[2] phase B voltage magnitude and phase
1042,
1044
VC float[2] phase C voltage magnitude and phase
1046,
1048
V0 float[2] 0-sequence voltage magnitude and phase
104A,
104C
V1 float[2] 1-sequence voltage magnitude and phase
104E,
1050
V2 float[2] 2-sequence voltage magnitude and phase
1052 VP float Polarizing voltage magnitude
1054 VS1 float Synchronizing voltage 1 magnitude
1056 VS2 float Synchronizing voltage 2 magnitude
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