Measuring Harmonic Current; Harmonic Current; Figure 4-19 Simulation Control View (Output On State, Simulation Stopped); Figure 4-20 Current Waveform Containing Many Harmonic Components - NF DP420LS Instruction Manual

 Simulation Control View (output on state, simulation stopped)
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Figure 4-19 Simulation Control View (Output On State, Simulation Stopped)

4.4

Measuring Harmonic Current

4.4.1 Harmonic current

Some electric devices of AC power input have its input current waveform greatly distorted from the
sine wave. When the power input section uses a capacitor input type rectifier circuit, the input
current typically distorts as shown in Figure 4–20. A waveform distorted like this contains many
harmonic components. If a current with many harmonic components is supplied to the power line in
high volume, the line voltage is distorted, causing problems such as malfunction of devices and
overheated transformer which may result in accidents.

Figure 4-20 Current Waveform Containing Many Harmonic Components

DP420LS/DP480LS
Voltage
電圧

4.4 Measuring Harmonic Current

Current
電流
Measured Value
to be displayed
Output setting of
Initial Step
117