71M6513 Harmonic Performance?
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Teridian Semiconductor Corporation has developed a custom compute engine firmware to support the energy metering in the presence of harmonics.?? The compute engine firmware was developed to provide the following capabilities:
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1.? Measurement of Wh information with harmonics and a separate Wh measurement register for fundamental component.? These two sets of registers are available simultaneously for meter harmonic analysis.
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?? The existing CE outputs, WSUM_X (0x42), W0SUM_X(0x43), WSUM1_X(0x44), and WSUM2_X(0x45) will be broadband Wh measurement registers
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?? Four new output registers, WSUM_F(0x5e), W0SUM_F(0x5b),W1SUM_F(0x5c) and W2SUM_F(0x5d), will be fundamental?? Wh output only.???
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2.? VSQh, ISQh, and VARh? measurement will be selectable between either broadband or fundamental only.??
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?? When NB_SELECT >=0, VRMS, IRMS, and VARh will be measurements of fundamental component only.? That is the output registers V0SQH_X(0x4e), V1SQH_X(0x4f), V2SQH_X(0x50), I0SQH_X(0x4a), I1SQH_X(0x4b), I2SQH_X(0x4c), INSQH_X(0x4d), VARSUM_X(0x46), VAR0SUM_X(0x47), VAR1SUM_X(0x48), VAR2SUM_X(0x49) all contain fundamental measurements only.
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?? When NB_SELECT < 0. VRMS, IRMS, and VARh will be broadband (inclusive harmonics).? That is the? output registers V0SQH_X(0x4e), V1SQH_X(0x4f), V2SQH_X(0x50), I0SQH_X(0x4a), I1SQH_X(0x4b), I2SQH_X(0x4c), INSQH_X(0x4d), VARSUM_X(0x46), VAR0SUM_X(0x47), VAR1SUM_X(0x48), VAR2SUM_X(0x49) all contain fundamental and harmonic components in their measurements.
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3.? Only 3 phase 4 wire wye ((Va* Ia? + Vb * Ib + Vc * Ic) or 3phase 3 wire (Va* Ia? +? Vb * Ib) configurations are supported.