Harmonic frequencies in electrical systems

Harmonics are distorted electrical waveforms that introduce inefficiencies into your electrical system. They produce wasteful heat and can cause plant issues and fees from your local power company.

Harmonic frequencies flow into the electrical system as a result of nonlinear electronic switching devices, such as variable frequency drives (VFDs), computer power supplies and energy-efficient lighting. Similarly, companies with heavy motor, VFD and lighting loads need to be aware of the problems that harmonics can cause. 

These problems include:

• Increased electrical usage
• Increased wear and tear on motors/equipment
• Higher maintenance costs
• Power quality problems upstream and downstream
• Utility penalties for introducing problems to the power grid

 Harmonic sources

 Harmonic symptoms

 Harmonic solutions

 Harmonics FAQs

Management

There are many business implications to managing harmonic distortion. In today’s competitive business environment, better awareness of electrical inefficiencies result in:

• Controlled capital expenses
• IEEE 519 compliance
• Increased uptime and profits
• Added value to facilities
• Reduced energy expenses

Maintenance and facility engineers

Taking a proactive approach to harmonic reduction helps to protect sensitive electronic equipment and reduce downtime due to motor and transformer heating.

It also eliminates the problems associated with sizing and applying backup generators on systems with high harmonics caused by drive loads.

Business owners and stakeholders

Taking steps to curb harmonics can improve return on investment and boost the intrinsic value of the facility or the enterprise.

Managing the electrical infrastructure will help to protect electrical assets and contribute to a "greener" environment by reducing utility CO₂ emissions.

Learn who should care about harmonics including electrical designers, consultants, contractors, electricians, utility personnel, customers, owners and more.

 View all Harmonics FAQ videos