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Power Quality Logger
Using the Logger
15
Logging with Voltage Converters
The 1744/1743 Logger includes an adjustable converter ratio that enables it to
be used with voltage converters (potential transformers, or PTs).
Note
When logging with voltage converters, make sure the power supply
cables are not connected in parallel to the voltage test leads, or the
Logger’s power consumption can reduce accuracy.
The converter ratio is defined using the PQ Log software.
Connecting the Logger
W X Warnings
• To avoid electrical shock, do not connect any part of
the Logger to systems that have higher voltages to
ground (earth) than are marked on the Logger.
• Areas between the power company meter and the
source of the distribution system are characterized as
CAT IV areas. To avoid electrical shock or equipment
damage, never connect the Logger to power in CAT IV
areas if the voltage-to-earth ground is greater than
300 V.
• To avoid damaging the Logger, never connect its
voltage measuring inputs to phase-to-phase voltages
higher than 830 V.
• To avoid damaging the Logger, never connect the
power supply leads to voltages higher than 660 V RMS
ac.
• The Logger is to be used and handled only by qualified
personnel (see page 6).
• Maintenance work on the Logger must be done only by
qualified service personnel.