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Applications & Articles

Power Quality in Focus: Why Precise Analysis Is Essential.

Disturbances in the power grid often go unnoticed until systems shut down or equipment fails. Regular power quality assessments allow early detection of problems and help prevent costly downtime. Modern power quality analyzers provide precise measurement data, ensuring stable processes, high energy efficiency, and increased operational safety.

Learn why power quality is a critical factor for reliable operation and how suitable measurement technology supports this.

With the growing use of digital technologies – including sensitive electronic systems – in industrial plants, data centers, and production environments, dependence on a stable and clean power supply is rising. Even minor deviations from nominal values can result in failures, data loss, or equipment damage. As a result, power quality is gaining importance among measurement and test engineers as well as decision-makers in maintenance, energy management, and planning.

Why Power Quality Matters.

Power quality describes the conformity of voltage, frequency, and waveform with defined nominal values. In practice, it is rarely perfect. Disturbances frequently occur in complex electrical infrastructures and can directly affect supply reliability and energy efficiency.
Typical disturbances include:

Typical Disturbance. Description
Voltage Dips Short-term voltage reduction by typically 10 to 90%, usually lasting a few milliseconds to seconds. Possible causes: starting large motors or short circuits in the grid. Possible effects: abrupt system or equipment shutdown, controller failures.
Voltage Fluctuations (Flicker) Repeated small voltage variations, caused for example by arc welding or large switching operations. Visible symptom: flickering lights. Possible effects: disruption of workplace lighting or machine control.
Harmonics Non-linear loads such as frequency converters or switched-mode power supplies generate voltages at multiples of the fundamental frequency (50 Hz). These distortions can cause transformer overheating or trigger protection mechanisms.
Network Disturbances Devices “pollute” the grid through harmonic currents, voltage distortions, or unbalanced loading. These effects accumulate in networks with high connection density.
Harmonic Distortions Distortion of the sinusoidal mains voltage, primarily caused by non-linear loads. Possible effects: reduced efficiency, overheating of equipment, interference with communication systems.

Such disturbances impair ongoing operation and increase long-term energy costs, accelerate equipment wear, and reduce system availability. Standards such as EN 50160, IEC 61000, and IEEE 519 define applicable limits, and compliance is essential in many industries for reliable and legally compliant operation.

Power Quality Analyzers as the Key to the Solution.

Reliable assessment of power quality requires specialized measurement equipment. Power quality analyzers provide detailed insight into the electrical parameters of a system – including voltage, current, frequency, harmonics, flicker, and transient events.
Depending on the device and configuration, both instantaneous values and long-term trends can be recorded and analyzed. Power quality analyzers therefore perform three essential functions:

1. Fault Diagnosis

Rapid identification of the cause of disturbances or system failures.

2. Quality Verification

Documentation of voltage quality for customers, partners, or grid operators.

3. Optimization

Identification of inefficient processes or overloaded components to improve energy consumption.

Power quality analyzers are generally designed in compliance with IEC 61000-4-30 (Class A) and meet high requirements for measurement accuracy, time resolution, and data security. They are indispensable tools not only for maintenance but also for planning departments and energy audits.

Stationary or Mobile?

Different types of power quality analyzers are available depending on the application.

Mobile power quality analyzers are flexible, easy to operate, and provide reliable data within a short time – ideal for troubleshooting or audits. They support fast, temporary measurements at different locations and, depending on device type and memory capacity, can also be used for several months, for example in energy consumption analyses.

Stationary power quality analyzers are designed for continuous monitoring and long-term analysis and can be integrated into complex systems. They are often part of energy management systems and continuously provide measurement data for operational optimization and fault prevention.

Criterion Stationary Mobile
Application Area Continuous monitoring, e.g. in industrial plants Temporary troubleshooting, commissioning, spot checks, also directly at the load
Measurement Period Weeks to years Hours to weeks
Complexity Comprehensive long-term and trend analyses Fast on-site assessment without complex installation
Memory Capacity Very large for long-term measurement, typically with transmission to central servers Limited, e.g. several GB; data is typically retrieved after measurement
Investment Costs Higher, due to permanent integration and design for continuous operation Lower, due to reduced infrastructure; ideal for selective use

Application Example for a Power Quality Analyzer.

A common example of mobile power quality analyzer use is acceptance testing after the installation or modification of industrial systems. The service technician installs the preconfigured analyzer directly at the system to check and document power quality and compliance with applicable standards. This enables early detection of potential issues before commissioning a new production line, minimizing downtime and follow-up costs.

Product Examples.

Devices from well-known manufacturers such as Fluke or Chauvin Arnoux have proven their reliability in practice. They combine precision, compliance with standards, and ease of use – both for mobile operation and long-term measurement. They are suitable for industrial facilities, renewable energy systems, and electric vehicle applications. These analyzers are used for professional troubleshooting and preventive maintenance in single- and three-phase power distribution systems.

Fluke Series 1770: High-Performance, Long-Term Fault Analysis.

  • Automatic measurement of power parameters and power quality data
  • For professional load testing, energy consumption studies, and fault analysis
  • Capture of fast transients
  • Energy Analyze Plus software for detailed evaluations with automated reporting
  • Standard-compliant accuracy and logging according to EN 50160, IEC 61000, IEEE 519, and GOST 33073
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Fluke 1773
FLUKE
Fluke 1773
1770 series power quality and power supply analyzer, class A, CAT III 1000 V / CAT IV 600 V
€7,072.00
1 in stock. Ready to ship in 1 business day
Fluke 1773 Basic
FLUKE
Fluke 1773 Basic
1770 series power quality and power supply analyzer, class A, CAT III 1000 V / CAT IV 600 V
€6,303.00
Delivery time upon request
Fluke 1775
FLUKE
Fluke 1775
1770 series power quality and power supply analyzer, class A, CAT III 1000 V / CAT IV 600 V
€9,304.00
2 in stock. Ready to ship in 1 business day
Fluke 1775 Basic
FLUKE
Fluke 1775 Basic
1770 series power quality and power supply analyzer, class A, CAT III 1000 V / CAT IV 600 V
€8,498.00
Delivery time upon request
1775/FPC EU
FLUKE
1775/FPC EU
Power Quality Analyzer, Class A, CAT III 1000 V / CAT IV 600 V, incl. 1 year Premium Care
€10,006.00
Delivery time upon request
Fluke 1777
FLUKE
Fluke 1777
1770 series power quality and power supply analyzer, class A, CAT III 1000 V / CAT IV 600 V
€11,787.00
3 in stock. Ready to ship in 1 business day
Fluke 1777 Basic
FLUKE
Fluke 1777 Basic
1770 series power quality and power supply analyzer, class A, CAT III 1000 V / CAT IV 600 V
€10,937.00
Delivery time upon request
1777/FPC EU
FLUKE
1777/FPC EU
Power Quality Analyzer, Class A, CAT III 1000 V / CAT IV 600 V, incl. 1 year Premium Care
€12,489.00
Delivery time upon request

Dranetz HDPQ Plus Series: Three-Phase Power Quality Analyzers.

  • Three-phase analysis of voltage, current, power, and disturbances for industrial, building, and utility networks
  • Ideal for power quality surveys, troubleshooting, inrush recording, energy management, and harmonic analysis
  • Captures voltage events including dips, flicker, transients, and harmonics in accordance with IEC 61000-4-30 Class A Ed. 3
  • Remote access via Ethernet, USB, or optional Bluetooth; intuitive operation with 7″ touchscreen
  • Dran-View 7 software for detailed analysis and standard-compliant documentation
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HDPQ-P-XAMFLEX3PKG
DRANETZ
HDPQ-P-XAMFLEX3PKG
3-Phase Energy and Grid Fault Analyzer HDPQ Xplorer Plus, Bundle Incl. Flexible Current Clamps
€13,967.00
Delivery time upon request
HDPQ-P-GA500PKG
DRANETZ
HDPQ-P-GA500PKG
3-Phase Energy and Mains Fault Analyzer HDPQ Guide Plus, Bundle Incl. Current Clamps
€8,591.00
Delivery time upon request
HDPQ-P-VAMFLEX3PKG
DRANETZ
HDPQ-P-VAMFLEX3PKG
3-Phase Energy and Mains Fault Analyzer HDPQ Visa Plus, Bundle Incl. Flexible Current Clamps
€7,017.00
Delivery time upon request
HDPQ-P-X4A10PKG
DRANETZ
HDPQ-P-X4A10PKG
3-Phase Energy and Grid Fault Analyzer HDPQ Xplorer 400 Plus, Bundle Incl. Current Clamps
€18,165.00
Delivery time upon request
HDPQ-P-VA500PKG
DRANETZ
HDPQ-P-VA500PKG
3-Phase Energy and Mains Fault Analyzer HDPQ Visa Plus, Bundle Incl. Current Clamps
€6,491.00
Delivery time upon request
HDPQ-P-GAMFLEX3PKG
DRANETZ
HDPQ-P-GAMFLEX3PKG
3-Phase Energy and Mains Fault Analyzer HDPQ Guide Plus, Bundle Incl. Flexible Current Clamps
€9,115.00
Delivery time upon request
HDPQ-P-GAFLEX6KPKG
DRANETZ
HDPQ-P-GAFLEX6KPKG
3-Phase Energy and Grid Fault Analyzer HDPQ Guide Plus, Bundle Incl. Flexible Current Clamps
€9,591.00
Delivery time upon request
HDPQ-P-X4AFLEX3KPKG
DRANETZ
HDPQ-P-X4AFLEX3KPKG
3-Phase Energy and Grid Fault Analyzer HDPQ Xplorer 400 Plus, Bundle Incl. Flexible Current Clamps
€18,165.00
Delivery time upon request
HDPQ-P-X4AFLEX6KPKG
DRANETZ
HDPQ-P-X4AFLEX6KPKG
3-Phase Energy and Grid Fault Analyzer HDPQ Xplorer 400 Plus, Bundle Incl. Flexible Current Clamps
€19,165.00
Delivery time upon request
HDPQ-P-VA10PKG
DRANETZ
HDPQ-P-VA10PKG
3-Phase Energy and Mains Fault Analyzer HDPQ Visa Plus, Bundle Incl. Current Clamps
€6,491.00
Delivery time upon request

Chauvin Arnoux Qualistar+ Series: Fast Diagnostics for Stationary or Mobile Use.

  • Precise measurement of all power quality parameters and power values
  • For testing and maintenance of industrial and commercial facilities with comprehensive diagnostics and versatile analysis functions
  • TrueInRush function for monitoring inrush currents of additional loads
  • Power Analyzer Transfer software for data evaluation
  • Standard-compliant measurements according to EN 50160 and IEC 61000
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P01160541
Chauvin Arnoux
P01160541
CA8333 network analyzer 4x V and 3x I inputs without current clamps
€3,625.00
Ready to ship in 5 to 10 business days
P01160591
Chauvin Arnoux
P01160591
CA8336 network analyzer 5x V and 4x I inputs without current clamps
€4,894.00
Ready to ship in 5 to 10 business days
P01160511
Chauvin Arnoux
P01160511
CA8331 network analyzer 4x V and 3x I inputs without current clamps
€2,210.00
Ready to ship in 5 to 10 business days

These and other products are available from dataTec, the specialist distributor for measurement and test technology. Consulting is manufacturer-independent and tailored to the application, budget, and required performance.

Conclusion: Power Quality Is Measurable – and Critical.

Stable power quality is not a luxury but a fundamental prerequisite for reliable processes, minimal downtime, and high energy efficiency. The good news: disturbances can be identified, documented, and corrected – provided the right tools are used.

Power quality analyzers make a decisive contribution – whether used as mobile devices for fast troubleshooting or as stationary systems for continuous monitoring. Selecting the appropriate solution safeguards equipment and ensures long-term operational reliability and competitiveness.

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