Datasheet

Energy values, including
Tonnes Oil Equivalent
The Qualistar models measure energy.
This mode displays all the values
relating to power and energy.
• “Start” and “Stop” keys
to activate and deactivate
summing of the energy values.
• A new feature is the wide variety of units available:
kW, Joule, nuclear toe, non-nuclear toe, BTU, etc
Calculation of K factor for transformers
The harmonic currents owing in a network
lead to increased losses in the windings.
This results in heating of the transformer
and reduces the life span of the instruments
connected.
• compliance with the NF EN 50464-3
standard for calculating transformer
derating.
• the FHL and European K factor
parameters are recorded and measured
simultaneously.
Harmonics
All the useful parameters are
measured: global THD and
per phase on U, I, V and VA,
phase offset of harmonics.
Some models offer a VA
harmonics function and an
“expert mode”.
New: the harmonics measurement function is more comprehensive:
• calculation of the harmonics in %f and %r
• decomposition of the harmonics on the neutral conductor
• calculation of the distorting voltages and currents
Distorting power
New!
Breakdown of the reactive power values,
with the concept of non-active power (N),
distorting power (D) and reactive power
(Q & Q
1
).
• Breakdown of the reactive power
to nd the distorting power linked
to the harmonics (VAD).
• Distorting power for sizing the harmonic
lters.
• Reactive power (var) of the fundamental
for sizing the battery of the power-
correction capacitor.
Power and energy quality analysers
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