How to Calculate NGR Resistance Value?
What is NGR? NGR-Neutral Grounding Resistance. NGR limits the ground fault current to the equipment’s safe operating current range to protect all the electrical equipment. … Read more
Basics
Polarization Index Test and DAR Test
The polarization index test is a 10-minute to 1-minute ratio test of insulation resistance. Similarly, the DAR test is a 60-second to 30-second insulation resistance … Read more
What is the effect of the speed regulator of a ceiling fan on power consumption?
This article describes how the power consumption of a ceiling fan changes with a change in the speed through a fan regulator. The conventional fan … Read more
Difference between Earthing, Grounding, and Neutral
In this article, we will explore the difference between grounding and neutral in electrical systems. While grounding and earthing may seem like interchangeable terms, there … Read more
Energy Efficient Motors
Energy efficient motors are the most economical because these motors have higher efficiency than conventional motors like EFF-1 and EFF-2. The economic production of the … Read more
What is difference between AC and DC Resistance of a conductor?
What is the difference between AC and DC Resistance? The AC resistance is always more than the DC resistance. Let us understand what is the … Read more
Why LV Winding Is Placed Next To The Core?
The LV winding is placed next to the core because, with this arrangement, we get the advantage of reduced insulation, low leakage reactance, and easy … Read more
What Is Voltage Unbalance?
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 Conductor Size Selection For Non Linear Loads
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, etc. … Read more
True Power Factor
What is True Power Factor? The true power factor is the product of the displacement power factor and the distortion power factor. The displacement power … Read more