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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.

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Low Voltage Design
Earthing Design
High Voltage Cable Design
Arc Flash Studies
Software Comparisons
Electrical Software
1653885507804 1170x585 - Popular
2 mins read

Typical Working Distances for Arc Flash Calculations

One of the main factors determining the severity of an arc flash injury is the proximity of the worker to the arc flash, also known as the working distance. Working distances from AS (ENA), IEEE, NFPA and DGUV Standards and Guides have been provided.
Infographic on power systems earthing standards, featuring diagrams and guidelines for substation earthing, touch/step voltage limits, and testing. Includes industry logos and software ad.
4 mins read

Standards for Power Systems Earthing Design

Experienced electrical engineers created this reference list of standards for power systems earthing/grounding for substations, renewable energy, etc.
Screenshot of cable sizing calculator software named Cable Pro Web
4 mins read

JCalc vs Cable Pro Web: A Complete Comparison

Cable Pro Web is cheaper with more features than JCalc (which is not free). Choose cable sizing software that scales with your business. This article honestly compares prices, features and ease of use.
A trench with several large orange pipes protruding through a rectangular board. Workers and construction materials are in the background.
5 mins read

Soil Temperature Calculations for Power Engineering

Soil temperature affects high voltage cable and earthing systems. Equations for soil temperature calculations based on air temperature are provided.
Electricity pylon with insulators against a cloudy sky.
10 mins read

Fault Current Distribution for Cable Transmission Lines

This report explains how to perform accurate earth fault current analysis for substations connected by cable transmission lines. Earth fault currents for simple cable and overhead transmission lines are explained first. Next, two case studies involving hybrid cable transmission lines are presented.
Crushed blue metal rock and foundation in switchyard 1 1170x585 - Popular
3 mins read

Surface Material Resistivity

This article provides typical values for surface layer resistivity to be used for earthing and ground electrical calculations of touch and step voltages.
Solar panels on Sydney building 1 1170x585 - Popular
5 mins read

Voltage Rise Calculations

Voltage rise can occur in solar PV systems on the AC side between the power inverters and network connection point. Voltage rise calculations are no different to those for voltage drop.
Close-up of a high-voltage power cable, showing layers of insulation, copper conductors, and outer black sheath.
5 mins read

Summary of Electric Power Cable History

This article provides a timeline of the key milestones from early 19th century insulated wires through to modern innovations in high-voltage cables.
Wind turbine foundation 1170x585 - Popular
13 mins read

Wind Farm Earthing Design and Modelling Guide

The technical guide explains the electrical systems, local WTG and combined earthing system design, touch and step voltage hazards, soil electrical resistivity measurements, earth fault currents, earthing system software modelling, and validation testing of earthing for wind farms.
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