FLUKE 1775/BASIC User Manual for the Fluke 1775/BASIC Three-Phase Power Quality Analyzer, 8 kV

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3 Phase Power Quality Analyzer

Measurement Data Review

The Analyzer has features for measurement data review in both the PQ Meter mode and the

PQ Logger mode. The PQ Logger mode also includes the PQ Health feature.

PQ Health

The PQ Health feature is available only in PQ Logger Mode.

When the PQ Logger Mode session starts, the Analyzer shows the overall PQ Health of the

electrical system as a summary of these parameters:

 Frequency

 Voltage

 Harmonics

 Unbalance

 Flicker

 Mains Signaling

 Events (dips, swells and interruptions)

 Rapid Voltage Changes

 Waveform Deviations

The frequency, unbalance, and events have a single bar.

Voltage variations and voltage harmonics show as three bars that depend on the configured

topology. The length of a bar increases if the related parameter is further away from its nominal

value. The bar turns from green to red if a maximum allowed tolerance requirement is

surpassed. When the standard defines two limits for a parameter (for example, voltage

variations have a limit for 95 % of the time and a limit for 100 % of the time) the bar changes

from green to orange when the parameter surpasses the 95 % limit but does not exceed the

100 % limit.

The exact representation shown on this screen depends up on the Power Quality standard

chosen in the setup. See Power Quality Standard. As the measurement proceeds, the green

bars typically grow as they get to the allowable limit indicated with a dotted bar. If the values

start to exceed the 95 % or 100 % limits, the bars turn to yellow or red. This is an immediate

insight that there is a problem.

Overview

The Overview screen is a summary of the voltage current and power variables and THD (Total

Harmonic Distortion).

V/A/Hz

The V/A/Hz screen is a more detailed view of voltage, current, and frequency. Voltage values

include phase-to-neutral, peak-to-peak, peak, and crest factor. Current values includes peak

current and crest factor. Any analog variables show at the bottom of the screen.

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FLUKE 1775/BASIC Three-Phase Power Quality Analyzer, 8 kV