PFCL Elite 6 / PFCL Elite 12
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1.2.7 Harmonics and THD
Non-linear loads, such as those in rectifiers, inverters, speed drives, kilns, etc., absorb non-sinusoidal
periodic currents from the grid. These currents are composed of a fundamental frequency component, rated
at 50 or 60 Hz, plus a series of overlapping currents, with frequencies that are multiples of the fundamental
frequency; they are defined as harmonics. The result is a deformation of the current and, as a consequence,
of the voltage, which leads to a series of associated secondary effects (overloads in conductors, machines
and automatic switches, phase offsets, interferences in electronic equipment, RCCB trips, etc.).
The level of harmonics is usually measured with the total harmonic distortion rate (THD), which is the ratio,
usually as a %, of the RMS value of the harmonic content and the value of the fundamental component.
2
INSTALLATION AND START-UP
This section contains information and warnings that the user must respect at all times to guarantee his own
safety and the safe operation of the device.
WARNING!
The
PFCL Elite
regulators are connected to units with capacitors that remain
charged even after the voltage has been disconnected.
Wait at least 5 minutes
after the
equipment is disconnected, before the internal components of the equipment are handled, in
order to avoid the risk of electric shock
.
Any manipulation or use of the equipment different from that specified by the
manufacturer may compromise user safety.
The power supply must be disconnected from the unit when it shows signs of deterioration or a faulty
operation. In this case, contact a qualified service representative.
The persons responsible for the installation or operation of the
PFCL Elite 6 or PFCL Elite 12
regulator must
follow the common safety measures for LV or MV installations to guarantee a safe operation, depending on
the installation location. In addition, they must take into account all safety warnings stated in this instruction
manual.
