EM Energy Solutions Power Quality Measurment Services

What is Power Quality?

Power quality is a generic term for disturbance-free electricity supply. Deviation from voltage or current sinusoidal waveform, which may result in equipment being disturbed or damaged, is to be regarded as a power quality disturbance. This means that the more sensitive equipment you connect to the grid, the higher should your demands on power quality and disturbance-free environment be.

EMES Power Quality measurement services

Good power quality increases efficiencies by saving you time and money, prolonging equipment life, increasing uptime and enhancing safety and compliance. Power quality issues, on the other hand, erode efficiencies resulting in a drain on your organisations bottom line.

EMES  power quality meauserement allow you to see and analyze your power quality and reveal hidden problems which can affect multiple aspects of your business. Power quality issues may not always be easy to spot but these hidden problems can affect multiple aspects of your business, with a long list of destructive and costly effects.

Poor power quality may reduce efficiency, cause higher utility and energy costs, and cause expensive downtime. With EMES power quality measurement, you can identify and analyze power quality problems like voltage interruptions, sags, harmonics etc. in order to ensure your electrical systems run smoothly.
Gaining power quality intelligence and control will help improve operations, reduce downtime, extend asset life, improve energy efficiency and lower costs.

EM Energy solutions portable power quality meter makes power quality analysis easier than ever before. 

Power Quality measurement is just the first step
Proper analysis of measurement data and correct advice are just as important.

There are various causes of power quality disturbances. To effectively correct and prevent disturbances and malfunctions, it is essential that you know the situation.
Our engineers have the knowledge, experience and professional equipment required to provide insight into the power quuality and energy efficiency of your installation. Taking Power Quality measurements is just the first step. This is followed by analysis of measurement data and formulation of results, findings and our advice. The time required for Power Quality measurement, analysis and reporting depend on the size of your electrical installation, your wishes and/or the challenges you may be facing. Usually, one day for measurement and one day for analysis and reporting is sufficient. However, many problems can’t be found immediately, especially those caused by different loads interacting. EMES advanced portable power quality analyzers are perfect instruments to record in depth voltage and current information over time, so you can better diagnose and resolve problems. Normally to check whether Power Quality meets the legal standard(s), a (at least) one week of measurement is always required.


Choosing the right equipment

In order to effectively detect and explain the disturbances and phenomena in the grid, the choice of equipment is crucial. 
There is a wide range of power quality solutions designed for this purpose.
The EMES portable PQA`s includes 4G cellular modem. Thanks to the modem, product setup and data gathering can all be made remotely. That means you’ll only need to go to the jobsite twice – once to install and once to take down. That’s a great economic benefit in any climate but even more valuable while we all strive to stay safe from COVID-19.


  • Voltage L-N / L-PEN / L-L (depending on grid type)
  • Current of the three phases
  • Current of the Neutral (including unbalance and zero sequence harmonics)
  • Active, Reactive and Apparent Power
  • Power Factor and Displacement Power Factor
  • Frequency and Voltage Unbalance
  • Harmonic Current and Voltage up to 50th order
  • Interharmonic Current and Voltage up to 50th order and above (9 or 20 kHz, depending on equipment)
  • Voltage Transients up to 1 MHz
  • Short- and Long Term Flicker

Objectives of power quality measurements

Power quality measurements are typically carried out to fulfill one or more of the following requirements:


  • To benchmark against contractual obligations or grid code criteria and power quality recommendations
  • Performance benchmarking of equipment or plant
  • To help make the predictive maintenance

Common Problems

Power quality measurements are typically carried out to fulfill one or more of the following requirements:


  • Sporadic plant disturbances, mostly in connection with the operation of other equipment
  • Faulty measuring, control and regulation technology (e.g. false alarms, mostly due to insufficient EMC)
  • Overheating and overloading of plants or plant parts (e.g. transformers)
  • Premature equipment failures (e.g. power supply units)
  • Triggering of switches and protective devices (false triggering)
  • Defective reactive power compensation equipment
  • Flickering lights (flicker

Scope of power quality measurement services

EM Energy Solutions’ power quality measurement services consist of a variety of measurements that can be tailored according to your specific needs. These power quality measurements typically include are:

  • Harmonic measurements
  • Voltage sags, swells, and interruptions measurements
  • Motor start-up studies
  • Reactive power measurements
  • Flicker severity studies
  • Transients and spikes studies

A team of experts

Our highly qualified engineers are experts in the field of Power Quality, with knowledge based on thorough study. In addition, our technical team has many years of experience with Power Quality measurements across very diverse sectors and project all over the world from South Korea to Europe and USA. These include industry, shipyards, water industry, data centers, hospital, infrastructure (tunnels, bridges), chemical and petrochemical industry, government and offshore ( oil and gas). By frequently sharing and discussing specific data obtained during Power Quality measurements the knowledge level of all our engineers grows thanks to the unique experiences of individual engineers.