Study Type; Power Quality - Fluke 1738/B User Manual

1736/1738
Users Manual

Study Type

Depending on the application, select either Load Study or Energy
Study.
•
Energy Study: Select this study type when voltage
measurements for a power quality assessment and power and
energy values that include active power (W) and PF are required.
•
Load Study: For convenience, some applications require you to
measure only the current that makes the connection to the point to
measure.
Typical applications are:
•
Verify the circuit capacity before adding additional load.
•
Identify situations where the allowable load can be exceeded.
Optionally, a nominal voltage can be configured to get pseudo-
apparent power readings.
22

Power Quality

Select the power quality standard (available on 1738 or 1736 with
1736/Upgrade or IEEE 519/Report license) for compliance evaluation.
EN 50160: voltage characteristics of electricity supplied by
public distribution networks.
The Logger supports these parameters:
•
Frequency
•
Voltage Variations
•
Voltage Harmonics and Voltage THD
•
Unbalance
•
Events
IEEE 519: recommended practice and requirements for harmonic
control in electric power systems.
The standard defines limits for voltage harmonics, voltage THD,
current harmonics, and TDD (total demand distortion). The limits for
current harmonics and TDD depend on the ratio of maximum demand
load current I to the short circuit current I
L
 
and .
If the values of I and I are not currently available, you can
SC L
update these values at a later time with the Energy Analyze
Plus software.
Set the Harmonics Standard to off when the harmonics compliance
evaluation is not required.
. Set the values with
SC
Note