HT Instruments PQA824 4 CTs, HTFLEX33 for Power Quality Analyzers

HT Instruments PQA824 CAT IV Power Quality Analyzer and 4 CTs, HTFLEX33

The power quality analyzer HT PQA824 model permits an easy and wide fast analysis of a huge quantity of data any other system. Thanks to an innovative design and a graphic colour TFT "touch screen" wide display these models finally meet all requests from any exigent electrical verifier. The interface it's incredible "user-friendly" due to the intuitive icon selection of any kind of feature and a contextual help it's available for each screen. Each internal parameter it's easy to reach for effect of  typical Windows tree structure.

The model permits the visualization of all parameters both in numeric and graphical mode with large use of waveforms and histograms (for harmonic analysis) screens. The vectorial diagram feature permit also to evaluate the mutual phase angle between voltages and current in order to understand the nature inductive or capacitive of the loads on an installation.

The power quality analyzer HT PQA824 have a great internal memory in order to save recording results for a lot of parameters (e.g: >3 weeks for 251 parameters and integrated period of 15 minutes), but this memory can be expanded by using of external compact flash cards fitted on meters. Pen drives USB connection it's also available in order to transfer recordings from meter and realize a practical and sure portable situation of all date. PQA824 meter are powered by a internal rechargeable Li-Ion battery which permits complete operation for more than 3 hours and are external supplied by using a 100/240V AC adaptor. USB interface permits the connection with PC for download and analysis of recordings with dedicated TOPVIEW Windows software.

The power quality analyzer HT PQA824 model also permits detection of fast voltage transients (spikes) with a minimum resolution of 5us (200kHz) with setting of different trigger thresholds very useful on troubleshooting problems on industrial installations (monitoring atmospheric discharging, analysis of switching problems, frequency noise.

PQA82x Innovative Features

• A wide (320x240pxls) graphical color TFT display with “touch screen” to surf the internal functions by using the supplied pointer pen
  
• User friendly icon type interface
• A synoptic connection scheme on the display  helps the user while connecting the instrument  to the installation under test

Easy System Configuration

• 4-wire, 3-wire, single-phase ARON
  
• STD or FLEX Clamps
• Frequency System
• Interfacing with Voltage transformers (TV)

EN50160 Analysis

Display in graphical and tabular form  analysis of the quality of the electricity service in accordance with EN50160.

Real-Time Measurements

• Waveforms of voltages / currents
• Vector diagram
• Power / Energy Active, reactive and apparent
• Power factor and Cosphi
• Harmonic voltage / current up to the 49th
• THD%
• Voltages unbalance
• Flicker

Energy Consumption

• Total active energy consumed during the recording
• Max peak active power
• Date and time recorded at the peak of power
• Date of start and stop recording
• Record Time
• Display of the recorded power

Recording Parameters

• Voltage dips and peaks
• Vrms / Irms and Power / Energy
• Harmonics and THD%
• Cosphi and Power Factor
• Frequency
• Unbalance
• Flicker
• Inrush currents
• Fast transients (spikes 5us)

Flicker Measurement

• Pst = Severity of Flicker short term calculated in an interval of 10 minutes.
• Plt = Severity of Flicker long term calculated from a sequence of 12 values ??of Pst on an interval of two hours.

Inrush Current

The power quality analyzer HT PQA824 is able to perform measurements and recordings of inrush currents with a minimum resolution of 10ms which is possible to obtain both numerical and graphical representations. The values ​​obtained are:

• 1000 events
• Phase L1, L2, L3 in which the event occurred
• Date / Time at which the event occurred
• Maximum value reached by the current

Fast Transients (Spikes)

The model PQA824 high sampling frequency allows you to perform the detection of fast voltage transients (spikes) with a resolution of at least 5μs (200kHz) and store them all in a full report of:

• Number of stage on which occurred the spike
• Date and time at which it occurred spike
• Type Up or Down
• Speed of the phenomenon Fast or Slow