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SDS2000X HD Series Digital Oscilloscope User Manual
i n t . s i g l e n t . c o m 2 3 3
Current Harmonics
Current harmonics are used to analyze the input current harmonics. An FFT of the selected channel
is performed to get the harmonic components. The signal settings and connection guide are the same
as the power quality test.
Configuration
Touch Config to recall the configuration dialog box:
A. Set the frequency of the line (Auto, 50 Hz,
60 Hz, or 400 Hz)
B. Set the standard type (IEC61000-3-2 A,
IEC61000-3-2 B, IEC61000-3-2 C or
IEC61000-3-2 D)
C. Set the display type (Off, Bar Chart, or
Table)
D. Return to the previous menu
Standard
IEC 61000-3-2 is an international standard that limits mains voltage distortion by prescribing the
maximum value for harmonic currents from the second harmonic up to and including the 40th
harmonic current. There are 4 different classes in the EN 61000-3-2 that have different limit values:
Class A: Balanced 3-phase equipment, household appliances excluding equipment identified as
class D, tools, excluding portable tools, dimmers for incandescent lamps, audio equipment, and
all other equipment, except that stated in one of the following classes.
Class B: Portable tools, arc welding equipment which is not professional equipment
Class C: Lighting equipment.
Class D: PC, PC monitors, radio, or TV receivers. Input power P ≤ 600 W.I
Parameter Description
For the first 40 harmonics, the following values are displayed:
Measured Value (RMS) -- The measured value displayed in the unit specified by the harmonic unit
parameter.
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