Power analysers

The quality of all kinds of products is vital and the energy network as well. This does not mean that the electricitynetwork is actually clean. Different processes are detected, such as Flicker, surges and voltage dips. It is necessary to include these processes to a minimum. The power analyzers will help the user to draw conclusions on the basis of periodic measurements, so that these problems can be solved.

The European regulation EN 50160 is one of the most important regulations for measurements of LV-installations. The essential values for LV-installations are subscribed in this regulation.Besides the EN50160  there is another important standard, the EN 61000-4-30. This standard ensures that different PQ instruments use the same definitons, and measurement techniques, for variouw power quality parameters: sags/dips, swells, frequency, harmonics, Flicker etc.. Use of this standard ensures that users use the same terms, measurements and definitions.

In order to measure and analyse a LV-installation, according to the EN 50160, two power analysers are available within the Nieaf-Smitt program:

PHA3300

The power harmonics analyser PHA3300 is a portable instrument for measuring and analysing single- and three phase systems. Also irregular or interrupted voltage supplies can be detected or recorded. Data recording is one of the most relevant functions of the instrument. After a period of statistical or periodical analysis, the data can be transferred to the PC software easily.

PHA4400

PHA4400 is a lightweight, handheld, 3-phase analyzer for quick Power Quality assessment in low and middle voltage systems. All major power quality parameters like U, I, PF, cos φ, P, Q and S can be monitored on-line,  measured or recorded. Thanks to various pre-set measuring profiles, different diagnostics can be performed on-site, even without a pc!

PQA6600

The power quality analyser PQA6600 is a complete instrument engineered for analysis of the quality of both single and three-phase systems. Basically, the PQA6600 is equal to the PHA3300, but more functions have been included.The PQA6600 has the following extra features:

• Waveforms measurement
• Fast logging
• Transients measurement
• Flicker analysis

Using these functions identifying the distortions in engines, computers and other appliances is easy.Depending on the value to be measured, several accessories and probes can be used. For measuring currents, several current clamp adapters are available (see chapter Current clamp adapters in Nieaf-Smitt Brochure 1). With these adapters, a complete three-phase installation can be measured and analysed up to 3000 Amps.

PQA7700

The PQA7700 is a handheld, simple to use, portable power quality analyser with four current and four voltage measuring channels. Integrated in a rugged housing and packed withpowerful functions it can be effectively used for monitoring, troubleshooting and analysing of power quality conditions in power distribution networks either in industry or utilities.The PQA7700 meets the demands of the standards IEC61000-4-30 and IEC 61557-12. For optimal analyses of the measured values, the included Windows software can be used. This software can be used for storing the test data and to make several reports and graphic displays, all according to the EN 50160 regulation. Obviously, the data and the reports can be stored and printed. For report modiication into a customized report, the data and reports can be exported to .doc and .xls-files.