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##### Asked by: Salobrar Godejohann

hobbies and interests audio production# What is current harmonic distortion?

Last Updated: 26th June, 2020

**Harmonic**Frequencies of a Periodic Voltage or

**Current**

**Harmonic distortion**is the

**distortion**ofthe signal due to these

**harmonics**. A voltage or

**current**that is purely sinusoidal has no

**harmonicdistortion**because it is a signal consisting of a singlefrequency.

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Considering this, what is meant by harmonic distortion?

The total **harmonic distortion** (THD) is ameasurement of the **harmonic distortion** present in a signaland is **defined** as the ratio of the sum of the powers of all**harmonic** components to the power of the fundamentalfrequency. **Distortion** factor, a closely related term, issometimes used as a synonym.

One may also ask, what is harmonic distortion and what are its effects? Page 1. **Effects** of **Harmonic Distortion** I.**Harmonic** currents produced by nonlinear loads are injectedback into **the** supply systems. These currents can interactadversely with a wide range of power system equipment, most notablycapacitors, transformers, and motors, causing additional losses,overheating, and overloading

In respect to this, what is acceptable total harmonic distortion?

While there is no national standard dictating **THD**limits on systems, there are recommended values for **acceptableharmonic distortion**. The limits on voltage **harmonics** arethus set at 5% for **THD** and 3% for any single**harmonic**.

How does harmonic distortion occur?

Voltage waveform **distortion** Each **harmonic** current in a facility's electricaldistribution system will cause a voltage at the same**harmonic** to exist when the **harmonic** current flowsinto an impedance. This results in voltage **harmonics**appearing at the load bus.