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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.

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Low Voltage Design
Earthing Design
High Voltage Cable Design
Arc Flash Studies
Software Comparisons
Electrical Software
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.
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.
Circuit breakers 1 1170x585 - Popular
8 mins read

Protection Coordination Requirements from Standards

There are several international Standards (AS/NZS, BS and IEC) which cover requirements for protection coordination of low voltage electrical systems and this article provides a summary of those as a reference.
Infrared image of cable tray showing temperature gradients with adjacent diagrams labeled Flat (1), Flat (2), Trefoil (1), Trefoil (2), and check or crossmarks indicating status.
8 mins read

Ampacity of Power Cables Installed in Trays

Explore the factors affecting cable ampacity in trays, including thermal and electromagnetic effects. Learn calculation methods and best practices for safe power cable installations.
Diagram showing electric field (E), gravitational field (G), weight (W), and electrostatic force (Fe) acting on a charged oil drop.
10 mins read

Modelling a Fall of Potential Earth Grid Impedance Test

Understand how software simulations enhance grid impedance tests, improving accuracy and efficiency in earthing system design and performance evaluation.
A graph displays time-current curves with a blue and red shaded areas, showing time (s) on the y-axis and current (A) on the x-axis, both on logarithmic scales.
2 mins read

A Step-by-Step Protection Coordination Study Example

Learn how to set and coordinate circuit breakers to meet AS/NZS 3000:2018, ensuring faults are isolated quickly and safely in electrical systems.
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.
A person wearing an orange safety vest holds a cross-section of a high-voltage power cable, showing multiple concentric copper segments.
17 mins read

HVDC Cable Current Ratings: Thermal and Electrical Stress Constraints

Comprehensive analysis of field inversion, IEC 60287 Standards, finite element modelling, and case studies to optimise HVDC cable ampacity and insulation design.
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.
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