CIRCUTOR QNA500 series - Manual (Page 41)

POWER QUALITY ANALYZER QNA500 8IO
QNA500 8IO Instruction manual 41 / 111
It is a perfect sine wave, with a "1" amplitude", RMS value equal to 0.707, so that the crest factor is
equal to 1.41. A perfect sine wave has no impacts and, therefore, the crest factor with a value of over
1.41 means that there is a certain impact degree.
8.13.2.- .WAT FILE
Registry variables Unit L1 L2 L3 III
Active energy kWh X X X X
Inductive reactive energy kvarh X X X X
Capacitive active energy kvarh X X X X
The variable recording period can be configured by the user and is different to the recording period of
an .STD file.
8.13.3.- .EVQ FILE
Events detected are stored in this file. The following data are stored from each one of the events:
• Event Type: Overvoltage, Sag or Interruption.
• Event Date: Date the event occurred. This value is obtained with a ½ Cycle accuracy.
• Event Type: This is stored when the event detected is an interruption, sag or overvoltage.
These events are defined in accordance with the specifications programmed in the QNA500.
The type of event also identifies the phase at which the event occurred.
• Duration of the Event: Duration of the event in milliseconds.
• Maximum/minimum voltage of the Event: When an interruption or sag is produced, the
minimum RMS½(*) voltage value obtained during the event will be stored. The maximum value
will be stored in the event of an overvoltage.
• Average voltage of the event: Average RMS½(*) voltage value obtained during the duration of
the recorded event.
• Voltage before the event: The RMS½* voltage value just before the event was produced will
be stored.
(*) ½ cycle RMS value: effective value of a complete cycle, refreshed every half cycle.