a moreno

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Basic Impulse Insulation Levels (BIL)

The Basic Impulse Insulation Levels refers to the ability of electric equipment such as transformers to withstand lightning surges. When lightning …

Testing Procedures for HV Voltage Transformers

Content:<p>1. Equipment required<p><i>Following equipment is necessary to perform testings:</i><p>Polarity test kit<br>• Megger 500-5000V<br>• Ohmmeter<br>• Multimeter<br>• Autotransformers …

(Protection) Relay Guides

Protection Relays<p>The relay is a well known and widely used component. Applications range from classic panel built control systems to modern inrefaces …

Torque Of Three-Phase Induction Motor Explained

Introduction to motor torque<p>The <i>rotating force</i> that a motor develops is called <i>torque</i>.<p>Due to the <i>physical laws of inertia</i>, where a body at rest tends to …

6 Factors Influencing Requirements for a Good Grounding System

Six Requirements To Consider<p>In an industrial plant or other facility that requires a grounding system, one or more of the following <b>must be carefully</b> …

Sizing and Protection of the Neutral Conductor (1)

Introduction<p><b>Sizing (c.s.a.)</b> and the <b>protection</b> of the neutral conductor, apart from its current-carrying requirement, depend on several factors, …

Electric Guitar

Why is continuous on-line monitoring of partial discharge in the switchgear necessary? | EEP

<b>electrical-engineering-portal.com</b> - Not sure? You know that periodical maintenance test like partial discharge test can still leave switchgear in …

Online Life

Equipotential Bonding For Metal Installations

Design of the earth-termination system for equipotential bonding<p>The electrical low voltage consumer’s installation requiring certain earthing …

How to get rid off the harmonics in electrical system?

Nothing good from harmonics…<p>The subject of harmonics is also a contributory factor in electrical noise I already wrote few days ago (Cable spacing as …

Electric Guitar

Electrical Thumb Rules You MUST Follow (Part 1)

Electrical Thumb Rules For:<p>Cable Capacity<p><b>For Cu Wire Current Capacity (Up to 30 Sq.mm) =</b> 6X Size of Wire in Sq.mm<br>Ex. For 2.5 Sq.mm = 6×2.5 = 15 Amp, …

Electrical Thumb Rules You MUST Follow (Part 2)

• For Sinusoidal Current: <b>Form Factor =</b> RMS Value/Average Value = 1.11<br>• For Sinusoidal Current: <b>Peak Factor =</b> Max Value/RMS Value = 1.414• <b><br>Average Value of</b> …

Electrical Thumb Rules You MUST Follow (Part 3)

Continued from second part: Electrical Thumb Rules You MUST Follow (Part 2)<p>Size of Capacitor for Power Factor Correction<p><b>For Motor</b><p>Size of Capacitor = …

Electrical Thumb Rules You MUST Follow (Part 4)

Eight rules to follow:<p>1. Substation Capacity and Short Circuit Current Capacity<p><b>As per GERC</b><p><b>Voltage</b><p><b>Sub Station Capacity</b><p><b>Short Circuit Current</b><p>400 KV<p>Up to …

Arduino

Electrical Thumb Rules You MUST Follow (Part 5)

Eight rules to follow:<p>1. Standard Size of Transformer (IEEE/ANSI 57.120)<p><b>Single Phase Transformer</b><p><b>Three Phase Transformer</b><p>5KVA, 10KVA, 15KVA, 25KVA, …

Arduino

Impact of Floating Neutral in Power Distribution

Originally posted on Electrical Notes & Articles:<br>Introduction: If The Neutral Conductor opens, Break or Loose at either its source side (Distribution …

Electrical Preventive Maintenance of Air Circuit Breakers

Recommended minimum practice for preventive maintenance<p>Insulation //<p><i>Remove and clean interphase barriers.</i> Clean all insulating materials with vacuum …

Home Improvement

Overvoltages Caused by Lightning

The Impacts of Lightning<p>Overvoltages of <i>atmospheric origin</i> arise from uncontrollable sources and their severity for the load depends on many …

Weather

An example how to calculate voltage drop and size of electrical cable

Input information<p>Electrical details:<p>Electrical load of <b>80KW</b>, distance between source and load is <b>200 meters</b>, system voltage <b>415V three phase</b>, power …

4 Motor Designs Identified In NEMA MG1

It’s all about performance…<p>Performance requirements for various types of induction motors for use on <b>standard sinewave power supplies</b> are identified …