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Power Quality Testing Resources & Solutions

Power quality testing resources and case studies are designed to give you a better understanding of potential causes of poor power quality, help you identify energy waste, and interpret power quality issues like voltage dips, swells, transients, unbalance, and harmonics.

This collection of resources aims to improve engineers and technicians knowledge and skills related to power quality measurements and power quality analysis, ultimately helping everyone to solve power problems in their respective workplaces.

Power Quality Measurements Explained

Taking power quality measurements can help you identify the sources of poor power quality and energy waste. This can help your facility save money and help protect your equipment from future damage.

Learn more about Fluke solutions for power quality testing

Recent stories

  • Power Monitoring Fluke 3540fc

    Case study: Fluke power monitor saves California wastewater plant thousands of dollars

    Read the wastewater plant case study on how the Fluke 3540 Power Monitor paid for itself in five months by eliminating the need to use contractors.
  • Recommended battery tests and testing schedule for battery back-up systems

    Recommended battery tests and testing schedule for battery back-up systems

    Healthy batteries should main¬tain a capacity above 90 % of the manufacturer’s rating; most manufacturers recommend replacing the battery if it falls below 80 %. A series of regular tests are recommended for ensuring that batteries are maintaining capacit
  • Electrical Panel Overheating for No Apparent Reason?

    Electrical Panel Overheating for No Apparent Reason?

    Troubleshooting an electrical panel overheating problem from unusual causes; testing with the power on, ruling out harmonics—and the resolution.
  • A fresh look at power quality

    How power quality issues affect the plant and how to get rid of them for good

    The electrical power issues that most frequently affect industrial plants include voltage sags and swells, harmonics, transients, and voltage and current unbalance. The proper tools to correct these issues include knowledge and electrical test instruments ideally suited for each task.

  • Electronics in your building don't like power problems

    Electronics in your building don't like power problems

    As we have seen, power problems have a bad effect on electronic devices. To detect a power problem, a technician will first check out the power supply to a device to make sure it is functioning properly.

  • How Tangedco audits power quality

    How Tangedco audits power quality

    Auditing power quality to detect harmonics, by utility in India using Fluke Series II Power Quality and Energy Analyzer

  • Make better energy consumption decisions

    Make better energy consumption decisions

    The Fluke 1738 Advanced Three-Phase Power Logger automatically captures and logs more than 500 power quality parameters to give electricians and technicians more visibility into the data needed to make better power quality and energy consumption decisions.
  • Troubleshooting the Most Common Power Quality Problems

    Troubleshooting the Most Common Power Quality Problems

    Troubleshooting the most common power quality problems—voltage distortion and harmonics. Tools needed, types of problems

  • Power Reliability for Facility Managers

    Power Reliability for Facility Managers

    Power reliability for facility managers (bottom line): top issues; adds, moves, changes; electrical and electronic loads; emergency power; older facilities

  • Determining Load Horsepower, Wiring, and Breaker Size for Safe and Efficient Installations

    Determining Load Horsepower, Wiring, and Breaker Size for Safe and Efficient Installations

    “Let's just oversize the motor and we can run it lightly loaded—that will save us some money and be easier on the motor.” This is a false belief among some who select and install motors. Properly sizing motors for a given load results in driving loads more efficiently, saving energy, and saving dollars. Motors typically are most efficient when they are 90 % to 95 % loaded. Just because a motor says “25 Hp” on the nameplate does not mean the motor is producing twenty-five horsepower as it operates.Clamp meter readings: Problems and Solutions

  • Motor analyzer efficiency reliability

    Electric motor efficiency and reliability: New testing approach matches real world conditions

    Measure torque while motors are still in service using an advanced tool that eliminates external torque and speed sensors.
  • Three-Phase Motor Failure

    Case Study: Three-Phase Motor Failure

    For three years in a row, a particularly large three-phase motor would fail twice a year. The facility maintenance manager called in both the electrical contractor and the motor manufacturer, who pointed fingers at each other but failed to resolve anything on site.
  • Energy waste you didn't even know about. Do you care?

    Energy waste you didn't even know about. Do you care?

    In 2005, most facilities viewed their monthly electrical utility bill as a standard cost of doing business. When oil topped $100 per barrel, attitudes changed practically overnight, generating a surge of interest in energy-conscious retrofits that previously would not have been cost-efficient. Yet, when the energy costs came down, attitudes and practices did not entirely revert. The United States was still trying hard to shake a recession. Global competition for providing products and services had grown even more intense. American facilities had found a potential new source of margin and profitability in the form of their monthly energy bill, and they weren't giving it up.

  • The Vibrating Transformer

    Case Study: The Vibrating Transformer

    This case history comes from an electrical contractor. Several of this contractor's clients operate large commercial buildings.
  • Network Hub Failure

    Case Study: Network Hub Failure

    Ever fixed something and still not solved the problem? Sometimes multiple deficiencies can all cause the same symptoms.
  • Malfunctioning Traffic Light

    Case Study: Malfunctioning Traffic Light

    The engineer carries a Fluke 43B on all trouble calls, because it provides a graphical display that allows customers to see a picture of the problem.
  • Rural Transformer Failure

    Case Study: Rural Transformer Failure

    This case history involves the investigation of a utility transformer failure that occurred in a rural area surrounded mostly by farmland and open space. The failure occurred in a location where power quality problems are rare.
  • Low Power Factor

    Case Study: Low Power Factor

    Because power quality issues are difficult to pinpoint, clients often reach the wrong conclusions about their power issues. That often leads to expensive solutions that don't actually correct the underlying problem.
  • Lighting Ballast Evaluation

    Case Study: Lighting Ballast Evaluation

    In most facilities, lighting is a major element of operating cost. Part of that cost is due to energy, and part is due to maintenance.
  • Half Wave Rectifier

    Case Study: Half Wave Rectifier

    One winter morning, the electrician received a call from a local school. The caller said a transformer supplying power to three portable classrooms was making a chattering noise, as if something were loose inside.
  • Elevator Trips Emergency Generator Breaker

    Case Study: Elevator Trips Emergency Generator Breaker

    A large commercial building had just finished an elevator equipment upgrade - but they hadn't been able to bring the elevator back into normal operation.
  • Malfunctioning Medical Machine

    Case Study: The Malfunctioning Medical Machine

    This case history is a classic example of the importance of a systematic approach to solving a problem. It involves a contractor who works with several high-technology manufacturing plants.
  • 5th Harmonic Resonance

    Case Study: 5th Harmonic Resonance

    A small city gets its water from a mountain lake 30 miles away. A pumping system at the lake brings water up a short incline and into a long gravity pipeline that feeds the city's water distribution system.
  • Troubleshooting power factor correction capacitors

    Troubleshooting power factor correction capacitors

    Power factor correction capacitors reduce energy costs by avoiding the premium rates that utilities charge when power factor falls below specified values.

  • Reliable backup power

    Reliable backup power

    Since information technology (IT) installations are particularly sensitive to power supply fluctuations and distortions, they typically rely on an uninterruptible power supply (UPS) to compensate. Some installations even include a second UPS supplied by a separate feeder, and a standby generator that can be set to start automatically three minutes after detecting a power interruption.

  • A hospital tech develops his power quality knowledge

    A hospital tech develops his power quality knowledge

    Downtime is costly, both in terms of patient wellbeing and monetary costs - the X-Ray, mammography, and other systems themselves cost millions and a failure can also idle technicians or surgical teams. Most of the facilities have motor/generators and can maintain operations independent of the utility, making the power system robust but also complex.

  • Seven steps to mitigate VFD harmonic issues

    Seven steps to mitigate VFD harmonic issues

    To determine the best solution for mitigating unwanted harmonics, start by investigating the equipment suspected of producing the bulk of the harmonic currents. Most often these are Variable Frequency Drives (VFD's). Use measuring equipment to measure and analyze the frequencies and amplitudes of the harmonics. This is much simpler than it sounds.

  • Practical applications for single-phase voltage recording

    Practical applications for single-phase voltage recording

    Voltage stability may be a problem in areas where loads are cycling on and off during the day. Large compressors, motors, welding machines, arc furnaces, power factor correction capacitors and other large electrical machinery along with system impedance can easily cause voltage dips, swells, and transients.

  • Texas Power Consultant Keeps Uninterruptible Power Supplies Up and Running

    Texas Power Consultant Keeps Uninterruptible Power Supplies Up and Running

    Critical systems run smoothly with regular maintenance and reliable tools Everybody knows that consistent, dependable electrical power is critical to any plant's function. But perhaps even more critical is a reliable uninterruptible power supply (UPS) system. UPS systems are the silent partners that just sit and wait until there's a break in power. At that point, the UPS system is the most important system in the plant. It has to be ready to spring into action in milliseconds to keeps things running for anywhere from seconds to hours.

  • Basic power quality on-the-go with Fluke 345 PQ clamp

    Basic power quality on-the-go with Fluke 345 PQ clamp

    Learn the basic measurements of voltage and current with the Fluke 345. Get familier with the waveform view, harmonics, power measurements, inrush current and logging.

  • Moving up to three-phase power quality measurements

    Moving up to three-phase power quality measurements

    Monitoring three-phase power quality is a must. Whether you troubleshoot mysterious electrical problems or provide additional services to a client, it is three-phase power that is provided to commercial and industrial customers and three-phase power that is distributed throughout a facility.

  • CONDITION MONITORING: 3 Asset diagnostic challenges 1500x1000- 1

    3 asset diagnostic challenges condition monitoring helps solve

    Limited resources can make monitoring all vital plant equipment difficult, if not impossible. That’s where a condition monitoring system with wireless sensors monitoring comes in.
  • FLUKE CONNECT: Landing - 6

    5 ways condition monitoring can improve your maintenance program

    Wireless sensors paired with condition monitoring software can improve reliability programs, decrease costs and increase uptime.
  • Machine Shop Motor Failures

    Case Study: Machine Shop Motor Failures

    Motor failures can be mysterious. Often, the mechanical loads on the motors have not changed and other loads connected to the same service appear to work normally - yet, the motors just fail.