PQA819 - PQA820
EN – 5
2. GENERAL DESCRIPTION
2.1. FOREWORD
This manual refers to PQA819 and PQA820 models. In the whole manual, the word
“instrument” generically indicates PQA820 model, unless otherwise indicated. The
instrument allows for a totally new approach to electric measurements. Using computer-
aided instruments allows analyzing a huge amount of data with a simplicity and speed
impossible to obtain with any other system.
The differences between the models are listed in the following Table 1
Function description
PQA819
PQA820
Recording of neutral current
Recording of voltage anomalies (sags, swells)
Recording of voltage unbalance
Recording of voltage/current harmonics up to 49th order
Recording of apparent power
Recording of generated power/energy
Recording of generated power factor / Cos
Number of selectable parameters
44 (fixed)
383 (fixed)
Recording autonomy (days)
> 230
(@ IP=15min)
> 30
(@ IP=10min)
Table 1: Differences between model PQA819 and PQA820
2.2. INSTRUMENT
FUNCTIONS
The instrument allows performing the following functions:
A real-time display (with connection to PC and/or iOS/Android devices) of the values
of the electric quantities of a single-phase or three-phase system with or without neutral
and of the harmonic analysis of voltages and currents
Recording (through the appropriate setting) over time of the values of AC/DC voltages,
voltage unbalance (PQA820), voltage anomalies (sags, swells) with a resolution of
10ms (PQA820), AC/DC currents, neutral current (PQA820) of the values of the
relevant harmonics (PQA820), THD% value, of the values of active, reactive and
apparent powers (PQA820), of power factors and cos
, of the values of active and
reactive energies, where recording is intended as saving in the instrument's memory
the values taken by the electrical quantities over time.
CAUTION
These terms will be used several times in this manual. We therefore invite
you to try and immediately focus the distinctions between the definitions
listed above.
