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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
Motors in a factory setting_ELEK Software
1 min read

Maximum Demand

The 4 main approaches for determining the maximum demand of an electrical installation are discussed.
Four thermal maps display varying heat distributions in a target area, with colors ranging from blue (cool) to red (hot).
7 mins read

Advanced Soil Drying for Accurate Ampacity Calculations

New methods address IEC 60287 limitations for soil drying calculations. Considers multiple circuits, load factor, and backfill installations for accurate power cable ampacity.
A diagram of a set of test tubes on a table with power.
3 mins read

Concrete-encased Earthing Rods

Metal earthing rods that are encased inside concrete will have a lower resistance. Concrete has a typical electrical resistivity of between 30 Ohm.m to 200 Ohm.m.
Lightning strike on substation and transmission tower
4 mins read

Transmission Line Tower Earthing Analysis

The purpose of transmission line grounding is to provide adequate lightning performance of the line; and effectively dissipate fault current avoiding the build-up of unsafe step and touch potentials around the tower base.
A software interface screen displaying a pop-up for creating a new electrical calculation. Various calculation options such as "Voltage Drop" and "Maximum Demand" are listed.
7 mins read

Top 3 Electrical Engineering Design Software for Australia

We've reviewed the top 3 electrical engineering design software packages in 2024 that are designed for Australian conditions and electrical standards. We've compared the features, capabilities, pricing, and technical support.
Three core low voltage cable 1170x585 - Popular
2 mins read

New Wiring Rules and cable current ratings calculations

Discussion of the changes to AS/NZS 3000:2018 affecting cable current-carrying capacity.
Screenshot of an application showing an edit load panel with fields for electrical installation, description, and phases. A photo of a 6-socket outlet adapter, quantity set to 12, is highlighted in red.
2 mins read

Double Socket-outlets in Maximum Demand Calculations

The AS/NZS 3000 Standard provides different rules in Appendix C for maximum demand with socket-outlets for domestic, commercial, and industrial electrical installations. Calculation examples are provided involving double socket-outlets.
Earthing Design Software Screenshot
6 mins read

Extensive Study of Earthing Grids

An extensive study of earthing grids using SafeGrid software designed for determining performance of grids of arbitrary geometrical configuration in two layer soils has been undertaken. The study confirms work by Dawalibi and Mukhedkar undertaken using similar software called CDEGS®.
Vehicle charging 1 1170x585 - Popular
3 mins read

Automatic Maximum Demand Calculations

The new maximum demand module provides fast and accurate calculations for loads in accordance with rules from the Standards and for custom loads. An ingenious automatic phase balancing algorithm ensures maximum demand and phase imbalance are both minimised.
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