**What are Harmonics?**

Apart from categorizing harmonics in the even and odd order, one more category of the harmonic order is triplen harmonics.

**What is Triplen Harmonics?**

The **triplen harmonics** are the odd multiples of third harmonics.The triplen harmonics orders are 3,9,15,21,. The triplen harmonic frequency is 150Hz,450 Hz,,750Hz etc.

**Triplen Harmonic Sources**

The single phase non linear loads like computer,printer or any single phase electronic equipment draws non linear current from the sinusoidal voltage source and generates substantial third order harmonics.

**Why Triplen Harmonics are Troublesome?**

If the single phase non linear loads are connected to the three phase four wire system, the triplen harmonic current caused by non linear loads does not cancel out rather it gets added. If the triplen harmonic current in each phase of three phase four wire system is 1 ampere, the current in the neutral wire will be 3 amperes. Thus the current flowing in the neutral overheats the conductor.

The third harmonics cause following adverse effect on power system.

**Related Posts**

**Harmonics and Harmonic Frequency in AC Circuits****Harmonics Filters – Cost and Effectiveness****Difference between Harmonics and Sub-Harmonics****Interharmonics in Power System****Effects of Harmonics on Transformers**

**Effects of Harmonics on Capacitors | Interaction of Harmonics with Capacitors****Effects of Harmonics on Power Cables****Impact Of Harmonics On Induction Motor****Adverse Effects Of Harmonics On Electrical Equipments****Impact Of Harmonics On Power Quality****Working Principle of Active Harmonic Filter****Neutral Conductor Size Selection For Non Linear Loads**