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ANALYZER OF THE QUALITY OF ELECTRIC POWER SUPPLY
QNA-303 --
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5
2.- MAIN FEATURES
The
QNA-303
is an analyzer expressly developed for the supervision of the
quality of electric power supply. Among their main characteristics, we can remark
following:
•
High protection level against severe electrical conditions:
−
Wide range of both supply and measuring voltages.
−
High protection level against overvoltage and transient events.
•
Connection to either 3 or 4-wire distribution systems.
•
Inner battery which permits the instrument to go on recording works even in
case of supply voltage loss.
•
Inner memory for saving all parameters measured by the
QNA-303
.
•
Communication via GSM / RS-232 / RS-485 (according to the model).
•
IP-55 rated instrument. High protection against adverse environmental
conditions.
2.1.- Basic features
The
QNA-303
series analyzer is an instrument specially designed for the analysis
of the electric power quality, for that reason, it only provides voltage inputs (isolated
by means of transformers).
Moreover, the great variety of available models makes the
QNA-303
suitable for
any situation and communication mode.
The inner battery of the instrument assures the continuity of the measuring
process by the
QNA-303
in case of any supply voltage loss event (short or long-term
line interruption).
The
QNA-303
is equipped with three A.C. voltage inputs which permit a
simultaneous measurement of the
voltage
from all three phases, together with the
frequency
, in any power system.
To perform the analysis of the quality of the electric power supply, the
QNA-303
will analyze all cycles from all three voltage phases to detect the occurrence of any
event (voltage dip, voltage swell, short and long line interruptions,...).
QNA-303
analyzers
are equipped with an
on-board memory
(
1 Mb or 3 Mb
according to the model)
for the
collection of quality parameters as well as events.
