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## Application Guide for Solving Harmonics ProblemsTHE NEED TO ADDRESS HARMONICS
One of the two most common problems for industrial power users is striving to meet IEEE Std. 519
The other most common problem resulting from harmonics is power factor capacitor failures, or a need to correct power factor in a harmonic environment. In low-voltage systems (600 V or less), capacitors are typically the lowest impedance at harmonic frequencies. Therefore, they experience very high currents and increased heat, which causes them to fail. So, even if meeting IEEE 519 is not the goal, dealing with harmonics may still be required. When correcting power factor, there is the possibility of creating a resonant circuit. A resonant circuit occurs at the frequency when the impedance of the system (mostly the power transformer) and the impedance of the power factor capacitor are equal. This is called the resonant frequency. The following formula can be used to find the resonant frequency in terms of harmonic number.
If there are any sources of current at that frequency, they will be amplified. This will cause high distortion levels and could blow fuses or trip circuit breakers. |

### MYRON ZUCKER INC. products are designed to:

- Improve power factor
- Eliminate utility penalties or surcharges
- Increase available distribution capacity
- Mitigate harmonic distortion
- Protect sensitive equipment
- Decrease downtime
- Reduce line losses and associated cost
- Comply with industry standards