Transformer Magnetizing Inrush Current
When energizing a power transformer, the transformer draws magnetizing current. The magnitude of the magnetizing current is several times higher than the rated current of … Read more
When energizing a power transformer, the transformer draws magnetizing current. The magnitude of the magnetizing current is several times higher than the rated current of … Read more
IR compensation method is used to provide the speed regulation in the DC drive. The DC drive increases the output voltage of the drive to … Read more
What is difference between AC and DC Resistance? The AC resistance is always more than the DC resistance. Let us understand what is the difference … Read more
What is Harmonics? Harmonic is a wave whose frequency is integral multiples of the fundamental frequency. The harmonics are a power quality problem that needs … Read more
The LV winding is placed next to the core because with this arrangement, we get advantage of reduced insulation, low leakage reactance and easily placement … Read more
Definition of Voltage Unbalance as per NEMA: The voltage unbalance is defined as the maximum deviation from the average of three-phase voltage or current, divided … Read more
Neutral sizing for nonlinear loads: Single phase non-linear loads like personal computers, electronic ballast, and other electronic equipment, generate odd harmonics (i.e. 3rd,5th, 7th, 9th, … Read more
The copper loss in the transformer is equal to the I2R loss. The copper loss is very important for the calculation of the transformer efficiency. … Read more
Due to simplicity in construction and ease in operation and maintenance, induction motors have become the most popular prime mover, and about 80 % of … Read more
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 … Read more