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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
ELEK vs Competitors
Electrical Software
Power cables installed, direct buried, representing the installation cases covered by AS/NZS 3008.1.1:2025
10 mins read

New 2025 Cable Sizing Standard AS/NZS 3008.1.1 — What Engineers and Electricians Need to Know

Seven major changes in AS/NZS 3008.1.1:2025 for cable sizing — new DC tables, multi-row correction factors, 110 °C aluminium ratings, voltage rise, and short-circuit limits.
Digital illustration of an electrical substation with blue and orange energy flows, representing the transfer and distribution of electrical power in a grid network.
6 mins read

CDEGS vs. ELEK SafeGrid Software

Compare CDEGS vs ELEK SafeGrid for earthing design software. See differences in features, soil modelling, safety calculations, accuracy, and usability for substation earthing design.
Earthing Design Software Screenshot
10 mins read

7 Best Earthing and Grounding Design Software Packages

Comparison of the best earthing and grounding system design software including ELEK SafeGrid, CDEGS, XGSLab, ETAP and more based on technical features and compares price.
Screenshot of high voltage cable rating software
7 mins read

CYMCAP vs. ELEK Cable HV Software

The features of ELEK Cable HV software and CYMCAP software are compared in detail.
NEC cable sizing calculation example showing 4/0 AWG conductor selection with ampacity, voltage drop, and NFPA 70 electrical code reference
14 mins read

How to Size Cables Using NEC (With Calculation Examples)

Learn how to size cables using NEC (NFPA 70) with step-by-step calculation examples, including ampacity, voltage drop, OCPD, and EGC sizing.
Diagram showing a 400V switchboard supplying power through cables with resistance and reactance to three motors and a control panel, illustrating supply and load voltage and power factor.
5 mins read

Advanced Voltage Drop Calculations

Advanced voltage drop calculations for electrical cables. Learn how power factor, cable temperature, impedance, motors, and installation conditions affect voltage drop.
Electrical power cables with exposed copper conductors representing updates to the AS/NZS 3008.1.1:2025 cable sizing standard
4 mins read

Key Changes in AS/NZS 3008.1.1:2025 for Cable Sizing

Learn the key changes in AS/NZS 3008.1.1:2025 including DC cable sizing tables, correction factors, voltage rise guidance and new installation cases.
Grounding grid beneath a large solar farm showing soil resistivity variation across the site
4 mins read

How Soil Resistivity Variation Affects Grounding Grid Impedance and Touch Voltage

Learn how soil resistivity variation affects grounding grid impedance and touch voltage on large solar farms and substations.
A meshed cross-section of a cable labeled with components: environment, jacket, armour, insulation, screen, conductor, nodes, elements, and cable surface temperature nodes.
10 mins read

Validating FEM-Based Cable Ampacity Calculations Using CIGRE TB 963

Finite element method (FEM) HV cable ampacity calculations benchmarked against CIGRE TB 963 and IEC 60287 to confirm accurate high-voltage cable ratings.
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