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Power Systems Technical Articles

Our experts continuously work on power systems problems, and we share solutions with Practical Reference Articles.

The main topics are earthing system modeling, power cable ratings, HV/LV electrical design, protective device coordination, and arc flash studies. We cover IEC and IEEE standards.

Sign up for my email newsletter and I will send you the latest technical articles as they are released – Jayson Patrick.

Photo of Jayson Patrick for Technical Articles page about electrical power systems Design

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Low Voltage Design
Earthing Design
High Voltage Cable Design
Arc Flash Studies
Software Comparisons
Electrical Software
Aerial of Industrial Installation with Substation 1170x585 - Popular
9 mins read

Earthing System Types Explained

Low voltage earthing systems include TN-S, TN-C-S, TT, IT and DC. High voltage earthing includes solid, ungrounded, resistance, reactance and resonant.
Electric Analogue Voltmeter on Switchgear Panel ELEK Software 1170x585 - Popular
4 mins read

Voltage Drop Calculation Method with Examples

Equations and method with all steps for accurate voltage drop calculations including power factor, cable operating temperature, resistance, reactance, DC, 1-phase or 3-phase, balanced/unbalanced with calculation examples provided.
Buried cables in group ELEK Software 1170x585 - Popular
4 mins read

Cable Current Rating Derating Factors Explained

Derating factors are applied to the cable current rating ensuring that cable operating temperature limits are not exceeded. Derating factors are derived to match the specific cable installation conditions.
A diagram illustrating the cellular process of a cell cycle.
5 mins read

Understanding Earth Fault Loop Impedance

The purpose of this document is to provide a better understanding of Fault Loop Impedance, also referred to as Earth Fault Loop Impedance so that the requirements of AS/NZS 3000 Wiring Rules for safety, design, installation and testing of electrical installation may be met.
Figure 06 Cross bonded cables with transposition ELEK Software 1170x585 - Popular
11 mins read

Sheath Bonding Design Guide for High Voltage Cables

Sheath bonding is one of the most important design aspects for high-voltage cable power transmission. Solidly, single-point, and cross-bonded systems are explained.
Orange PVC electrical conduit of different sizes
7 mins read

Conduit Sizing Requirements with Example Calculations

Equations for calculating conduit sizes and space factors in accordance with standards are provided. Worked examples of conduit sizing calculations are provided.
Soil resistivity measurements using Wenner method 1 1170x585 - Popular
3 mins read

Typical Values of Soil Resistivity

Soil electrical resistivity varies based on several factors. Use these tables to validate your soil measurements or devise a soil model without having measurements for preliminary earthing/grounding designs.
Close-up of orange industrial cables coiled together, with one frayed open end visible in the foreground.
10 mins read

AS/NZS 3008 Cable Sizing Calculations: Step-by-Step Guide

Size active, neutral, and earth cables using AS/NZS 3008. The guide covers current capacity, voltage drop, and short-circuit calculations with examples.
Short circuit cable rating ELEK Software 1 1170x585 - Popular
4 mins read

Short Circuit Power Cable Sizing Explained

The fault current which flows in a power cable causes its temperature to rise dramatically. The adiabatic equations for calculating the minimum conductor size to withstand the short circuit are explained.
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