Ht-instruments HT9022 Bedienungsanleitung PDF herunterladen (Seite 53)

HT9022

EN - 51

9. APPENDIX – THEORETICAL OUTLINE

9.1. CALCULATION OF POWERS IN “AC 1P” MODE

The instrument measures the values of Rms Voltage and Rms Current and calculates the

average Power values for each period. The formulas for power calculation are:

∑

××=

∑∑

×××=

PSQ −=

Pf =

where:

N = number of samples in the period

9.2. CALCULATION OF POWERS IN “AC 3P” MODE

The instrument measures the values of Rms Voltage and Rms Current and calculates the

average Power values for each period. The formulas for power calculation are:

∑

×××=

∑∑

××××=

QSP −=

Pf =

where:

N = number of samples in the period

9.3. CALCULATION OF POWERS IN “DC” MODE

The instrument measures the values of Avg Voltage and Avg Current and calculates the

average Power value for each period. The formula for power calculation is:

⎟

⎠

⎞

⎜

⎝

⎛

××

⎟

⎠

⎞

⎜

⎝

⎛

×=

∑∑

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