Atec Dranetz_PX5 - Manual (Page 2)

Load Distortion and Imbalance
Rectified-input power supplies plus other non-linear loads have increased from
25% of the total U.S. load to over 65% today. These loads draw current only during
part of the waveform, resulting in current distortion, and depending on harmonic
impedances, which causes voltage
distortion as well. This distortion
can have a significant derating effect
on equipment such as motors and
transformers, causing overheating
that shorten equipment life. The
PowerXplorer measures the full
range of arithmetic, vector and
sequencing parameters contained
in IEEE 1459, to evaluate distortion
and restore balanced loads.
The PowerXplorer ™ PX5 integrates the most advanced feature set available in a power monitoring instrument, with an easy-to-navigate,
color graphical user interface. With high-speed sampling and data capture (1 microsecond/channel), this 8-channel workhorse simultaneously
captures and characterizes hundreds of parameters, using a range of standard and customizable operating modes. The unique measurement
capabilities of the PowerXplorer include capture of low-medium-high frequency transients through peak, waveshape, rms duration and
adaptive high-speed sampling, as well as power measurements to clearly characterize non-sinusoidal and unbalanced systems.
Power Quality Surveys and Diagnostics
A power quality survey is key to pinpointing and diagnosing problems or negative
trends and to effectively implement a reliability-centered maintenance program. By
evaluating power quality over a week or longer, baseline conditions and susceptibility
to events can be determined so
that corrective measures can be
implemented. The PowerXplorer
has a built-in event characterizer
that directly supports troubleshooting
and the gathering of survey data—
for improving power quality and
equipment reliability, as well as for
matching the requirements and
susceptibilities of that equipment to
the incoming supply.
Fast Transient Capture
The PowerXplorer uses digitized high-speed sampling to capture and analyze
microsecond-wide transients (Dranetz 658-like and BMI 8800-like). Transients,
generated by fast-switching electronics, medical diagnostic equipment, capacitor
switching, lightning, transformer
energization, and load shifting,
are immediately characterized as
impulsive or oscillatory and detailed
for further analysis. Capable of
capturing the complete power
quality spectrum, the PowerXplorer
provides scope-like display of the
entire transient.
Flicker
The activation of arc furnace, large induction machines and other large loads that
produce continuous voltage impulses cause a power quality event called flicker.
Typically, flicker occurs on systems that are weak relative to the amount of power
required by the load, combined with
considerable variations in current
occurring over a short period of
time. The PowerXplorer captures
flicker data per IEC 61000-4-15,
which can be further evaluated
using Dran-View visualization,
analysis and reporting software.
Compliance Monitoring
The PowerXplorer has been designed to meet the most advanced power quality
standards, including IEEE 1159, IEC 61000-4-30 Class A and EN50160. A
statistical output is produced to quickly verify compliance with international
quality-of-supply standards and
benchmark power quality. In an
instant, the PowerXplorer provides
a snapshot of over 13 key
parameters, including unbalance,
voltage variations and harmonics.
Harmonics
As the sensitivity of power electronics increases, equipment ranging from HVAC
systems, personal computers and copiers to computerized process equipment and
manufacturing systems are susceptible to harmonic pollution. In fact, harmonics
can cause small, almost imperceptible
variations in performance that
aggregate to effect significant
long-term damage. Current
harmonics generated by a source
can pollute the entire power system
without being affected itself. The
PowerXplorer captures detailed
harmonics, interharmonics and
subharmonics to effectively trouble-
shoot the complex problems caused
by these events.
P
OWER
X
PLORER
PX5
PowerXplorer users can select
from a multitude of data displays
such as phasors, waveforms, meters and harmonic spectrums, as well as recording
options that include continuous monitoring or report-by exception, and AC and
DC measurements for events lasting from a microsecond to an hour. Information
presentation options range from quality-of-supply, statistical and trending to the
PowerXplorer’s unique annunciator “report card” that provides instant classification
of events. Remote communications are made easy using RS-232, ethernet or USB
options to download data for further analysis and reporting using industry-leading
DRAN-VIEW software.
DRAN-VIEW
The 8-channel PowerXplorer PX5-400 provides the full range of advanced
monitoring and measurement for 400 Hz applications as well as for 50/60 Hz.
Designed specifically for military, shipboard, aerospace and other applications, the
PowerXplorer PX5-400 contains the same advanced feature set as the PowerXplorer,
including advanced data characterization, cross-triggering power, and the
measurement of distortion parameters.
DRAN-VIEW is a powerful, yet simple to use tool to visualize
and analyze complex power quality events, locate faults,
isolate potentially harmful trends, and correlate data
among and across sites.