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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
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.
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.
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.
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.
ELEK Software GIS Substation by Siemens 1170x585 - Popular
3 mins read

Earthing modelling of concrete slabs

Switchgear in substations is installed on top of concrete slabs containing substantial quantities of steel reinforcement. Often the embedded steel reinforcement is bonded to the main earthing system and used to cost-effectively improve earthing electrical performance and safety.
Screenshot of high voltage cable rating software
5 mins read

CYMCAP vs. ELEK Cable HV Software

The features of ELEK Cable HV software and CYMCAP software are compared in detail.
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.
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.
Cross-section of a cable duct in soil showing airflow patterns: warm air rises in the center, cool air descends by the wall, and heat is conducted into the soil.
9 mins read

Ampacity of Multiple Cable Circuits in a Duct

Accurate ampacity for multiple cable circuits in a duct using FEM: Learn how mutual heating and duct arrangement impact safe, efficient cable design in solar PV systems.
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