Neutral Conductor Size Selection For Non Linear Loads

Single phase non linear loads like, personal computers, electronic ballast and other electronic equipments, generate odd harmonics (i.e. 3rd ,5th, 7th, 9th, etc. ). The troublesome harmonics for single phase loads are the 3rd and odd multiples of 3rd (3rd, 9th, 15th etc.). These harmonics are called “ triplens harmonics “. The triplen harmonics are … Read more

Copper Loss In Transformer

The copper loss in transformer is equal to the I2R loss. The copper loss is very important for calculation of the transformer efficiency. The efficiency of the transformer can be improved by minimizing the copper loss and core loss.   In the transformer, the copper loss in the primary winding is Ip2Rp , and the … Read more

Impact Of Harmonics On Induction Motor

Due to simplicity in construction and ease in operation and maintenance, induction motors have become the most popular prime mover, and about 80 % of the electrical drives are induction motors. An induction motor will give the best performance if the perfect sinusoidal voltage is fed to the induction motor.         V = Vm … Read more

Adverse Effects Of Harmonics On Electrical Equipments

HARMONICS CAUSES THE FOLLOWING ADVERSE EFFECTS: Overheating of transformers and rotating equipment Motors and generators can be adversely affected by the presence of harmonic voltage and current due to increased heating caused by iron and copper loss. In addition to this harmonic current can increase an audible noise emission and reduce machine efficiency. All these … Read more

True Power Factor

What is True Power Factor? The true power factor is product of the displacement power factor and the distortion power factor.The displacement power factor depends on the phase angle difference between the voltage and current of a linear load, whereas the distortion power factor depends on the total harmonic distortion caused by the non linear … Read more