# Power System Fundamentals

Power system fundamentals covers short-circuit studies, load flow studies, arc flash studies etc. Articles here cover some of the basics too which are important if you want to understand some of these studies. The basics include per unit systems, symmetrical components, current ratings etc.

## What Do Symmetrical, Asymmetrical, Momentary, Interrupting, Close & Latch Ratings Mean?

These terms were coined over a time period to identify the appropriate short circuit current magnitude that engineers could use to size the switchgears, switchboards, panelboards, and the circuit breakers.

## Symmetrical Components – Demystified

Learning symmetrical components can be overwhelming if you are considering its mathematical aspect only. It is time to step back and understand this concept from a macro view.

## Arc Flash Hazard Study – 5 Ways You Can Ruin It

The complete article written by Steve Coleman and Aleen Mohammed (PeGuru admin) is published in the Electrical Construction & Maintenance magazine. Read this article on ECMweb at: https://ecmweb.com/arc-flash/arc-flash-hazard-evaluation Article Abstract: If you are conducting an arc flash study, you are probably using one of the many software packages that can perform the analysis for you …

## Arc Flash Hazard Study – The Basics

Arc flash hazard is a huge concern in areas where you are operating medium voltage (1kV – 34kV) and low voltage (less than 1kV) equipment. Mostly because, when you inadvertently initiate a fault, an arc flash ensuing it releases enormous amount of heat energy. The composition of this arc includes molten bits of copper or aluminium busbar or cable.

## Per Unit System – An Introduction

Fundamental to any power system analysis is the know-how of per unit systems. This article, part of a series of articles, will explain step by step how to calculate these parameters for any component anywhere in the power system. Let’s begin with the purpose.

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