Measurement of Insulation Resistance
The measurement of insulation resistance is a key test used to check the condition of electrical insulation in equipment and wiring. By measuring how much
Basics
How to Calculate NGR Resistance Value?
Neutral Grounding Resistors (NGRs) play a critical role in electrical power systems by controlling fault currents and protecting equipment during ground faults. Proper calculation and
Polarization Index(PI) Test and DA Test
The Polarization Index (PI) and Dielectric Absorption Ratio (DAR) tests are essential diagnostic tools for assessing insulation health in transformers and motors. The polarization index
Effect of Fan Regulator on Power Consumption
The effect of fan regulator on power consumption is an important consideration when aiming to save electricity at home. Many people wonder, “Does a fan
Difference Between Earthing, Grounding, and Neutral in Electrical Systems
Earthing, grounding, and neutral are often confused terms in electrical systems—but they serve different safety and functional purposes. While “grounding” and “earthing” are sometimes used
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. Cost-effective production is the need
What is difference between AC and DC Resistance of a conductor?
AC resistance is higher than DC resistance due to skin and proximity effects. While DC current uses the full conductor cross-section, AC current flows near
Why LV Winding Is Placed Next To The Core?
In a transformer, the LV (Low Voltage) and HV (High Voltage) windings are arranged strategically for performance and safety. One common design is to place
What is Voltage Unbalance and How to Calculate It?
Voltage unbalance (also called voltage imbalance) refers to the condition in a three-phase system when the voltages across the phases are not equal in magnitude
Neutral Conductor Sizing in 3-Phase Systems with Non-Linear Loads
Non-linear loads like computers and LED lights generate harmonic currents—especially 3rd-order (triplen) harmonics—that accumulate in the neutral wire. If not properly sized, the neutral can