Mathematical Formulas For Various Parameters; Rms Values Of Half-Cycle Voltage And Current; Appendix A - AEMC 8335 Power Pad User Manual

MATHEMATICAL FORMULAS FOR VARIOUS PARAMETERS

NOTE the following abbreviations used in this section:
NSHC = number of samples per half cycle (between two consecutive
zeros)
NSC = number of samples per cycle
NSS = number of samples in a second (multiple of NSC)
V = voltage phase to neutral
U = voltage phase to phase

RMS values of half-cycle voltage and current

(excluding neutral)
[]
Vhalf i =
[]
i
Uhalf =
[]
i
Ahalf =
n: sample (0; 255)
i: phase (0; 1; 2)
Shop for AEMC products online at:
Power Quality Analyzer Model 8335

APPENDIX A

1 Next Zero
∑
⋅ V
NSHC
n : Zero
1
Next Zero
∑
U
⋅
NSHC
n Zero
:
1 Next Zero
∑
A
⋅
NSHC
n : Zero
PowerMeterStore
www.
[][ ]
2
i n
Single rms voltage half-period i + 1 phase
[][ ]
2
i n
Compound rms voltage half-period i + 1 phase
[][ ]
2
i n
Rms current half-period i + 1 phase
1.877.766.5412
.ca
113