Power Quality Logger
Using
the
Logger
11
Using the Logger
This section explains how to operate the 1744/1743 Power Quality Logger.
A typical logging session includes four steps:
1.
Preparing the Logger for use with the PQ Log software.
2.
Installing the Logger at the logging site.
3.
Leaving the Logger to collect data for a period.
4.
Downloading and evaluating the logged data.
These steps are described in the following pages.
Logging Jobs
Logging jobs are defined using the PQ Log software, and transferred to the
Logger over the RS232 cable. Each job contains the following information:
•
Logging function (P for Model 1743, and P or A for Model 1744)
•
Measuring period, defined by start and end times
•
Time activated, switch or immediate job
•
Input range
•
Nominal voltage, primary and secondary voltage for logging with
voltage converters
•
Logging of phase-neutral wire or phase-phase
•
Memory model
•
Averaging period length
•
Logging time periods
•
Interharmonics and signaling voltages
•
Limit values for events
•
Memory model for events: circular (first-in/first-out, continuous), or
linear (quit logging when logging period is finished)
•
Logging of current-neutral wire
•
Converter ratios for current and voltage if using potential transformers
(PTs) and current transformers (CTs) at a medium-voltage network
site
