APPENDIX A: APPLICATION NOTES DATA LOGGER IMPLEMENTATION
PQM POWER QUALITY METER – INSTRUCTION MANUAL A–19
Data Log Parameters
Listed below are the parameters available for capturing data via the Data Logger. Note
that these parameters will be placed within the Record structure of the Data Log in the
order and size that they appear in this table.
where:I = current; V = Voltage; P = Real Power; Q = Reactive Power; S = Apparent Power; PF
= Power Factor
THD = Total Harmonic Distortion
Table A–1: Data Log Parameters
DATA LOG
PARAMETER
SIZE
(BYTES)
DATA LOG
PARAMETER
SIZE
(BYTES)
DATA LOG
PARAMETER
SIZE
(BYTES)
Ia 2 PFa 2 kVAh 4
Ib 2 Pb 4 Ia Demand 2
Ic 2 Qb 4 Ib Demand 2
Iavg 2 Sb 4 Ic Demand 2
In 2 PFb 2 In Demand 2
I Unbalance 2 Pc 4 P3 Demand 4
Van 4 Qc 4 Q3 Demand 4
Vbn 4 Sc 4 S3 Demand 4
Vcn 4 PFc 2 Ia THD 2
Vpavg 4 P3 4 Ib THD 2
Vab 4 Q3 4 Ic THD 2
Vbc 4 S3 4 In THD 2
Vca 4 PF3 2 Van THD 2
Vlavg 4 Frequency 2 Vbn THD 2
V Unbalance 2 Positive kWh 4 Vcn THD 2
Pa 4 Negative kWh 4 Vab THD 2
Qa 4 Positive kvarh 4 Vbc THD 2
Sa 4 Negative kvarh 4 Analog Input 4
Courtesy of NationalSwitchgear.com
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