6100B/6105A
Users Manual
A-2
IEC 61868 Evaluation of Flicker severity
IEC 61000-3-2 Limits for harmonic current emissions (equipment input current
<= 16A per phase
IEC 61000-3-3 Limits of voltage changes, voltage fluctuations and flicker in
public low-voltage supply systems (for equipment <= 16A per
phase)
IEC 61000-4-7 Harmonics and interharmonics measurements
IEC 61000-4-11 Voltage dips, short interruptions and voltage variations
IEC 61000-4-14 Voltage fluctuation immunity test
IEC 61000-4-15 Flicker meter functional design specification
IEC 61000-4-30 (draft)
Interharmonic A frequency component of a periodic quantity (ac waveform) that
is not an integer multiple of the frequency at which the system is
operating.
Interruption For a single-phase voltage, there is an interruption if the
RMS(1/2) value is below 10% of the reference voltage. In a
three-phase system, an interruption is when all three phases are
below 10% simultaneously.
Measurement uncertainty Where used in this document, Measurement Uncertainty is the
contribution to uncertainty because of resolution of the
measuring device and the randomness of the indication due to
‘noise’.
MUT Meter Under Test (used in the Energy option chapter).
Nominal voltage The nominal voltage is the reference voltage.
Phase A phase is the combination of a voltage channel and a current
channel. The phases are identified as L1, L2 and L3. L1 is the
master phase in a multi-phase system. Neutral phase is
identified as N.
Phase angle Phase angle is the angular difference between two
corresponding points on two ac waveforms of the same
frequency or which have frequencies which are integer multiples
of each other.
Pst Short term flicker indicator, Pst = 1 is the conventional threshold
of irritability.
Reference channel The reference channel is L1,Voltage
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