CLAMP ON POWER HITESTER Hioki 3286-20

Power measuring instruments

Measure phase on a single-phase line:

1ø Power Factor meter mode
The phase angle between the voltage waveform and the current waveform is found, and the power factor (cos ø) and reactivity (sin ø) are calculated and displayed.
The 3286-20 provides the following 2 types of power factor measurement. If the waveform includes harmonic distortion, there will be a difference between the two measurement values, and the method must be selected accordingly.

Power factor derived by phase discrimination (cos ø): 1ø Power Factor meter and 3ø Power Factor meter mode From the phase information for the fundamental frequency component, cos ø is calculated. This is suitable for assessing the quality of a power supply.

Power factor (effective value power factor) derived from effective power ÷ apparent power: 1ø Power meter mode This is calculated from the power value including harmonic components (effective power ÷ apparent power). This is suitable for evaluating the performance of standalone load equipment and similar cases.
* It is not possible to calculate the effective power factor of a three-phase line.

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