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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
Electrical Wiring Being Installed for a New Commercial Building
6 mins read

Economic and Energy Efficient Cable Sizing

The principle of economic cable sizing is to select a minimum cable size that is safe to use and the cost of the losses over the lifetime is also minimised.
Power Cables lineup 1170x585 - Articles
17 mins read

High Voltage Power Cable Current Ratings

Explains the effects of the installation conditions and the bonding arrangement on the current rating of high voltage power cables.
Orange PVC electrical conduit of different sizes
7 mins read

Conduit Sizing Requirements with Example Calculations

Equations for calculating conduit sizes and space factors in accordance with standards are provided. Worked examples of conduit sizing calculations are provided.
A group of different electrical power cables
7 mins read

Skin and Proximity Effects on AC Resistance Calculations

The AC resistance of a cable conductor is always larger than the DC resistance. The primary reasons are ‘skin effect’ and ‘proximity effect’. Equations and example calculations are provided in this article.
Solar panels on a dirt field in arizona.
5 mins read

Grounding Conductor Selection for Utility-scale Solar Farms

Copper is often preferred for its superior electrical properties, while aluminum and galvanized steel are chosen for cost-effectiveness. Copper-clad steel can offer a balance between cost and performance. This article demonstrates which option is best for different scenarios.
High voltage power cable with copper conductors
8 mins read

Achieving Accurate High Voltage Cable Current Ratings

Accurate high voltage cable current ratings achieved - ELEK Cable HV software matches CIGRE TB 880 and performs IEC 60287 compliant calculations.
Oil-filled cable with finite element mesh plot for current rating calculation
3 mins read

Current Rating of High Voltage Oil-filled Cables

Explains the fundamentals of oil-filled cables current rating calculations to IEC 60287 and provides and example calculation for a 400 kV single core cable.
Wind turbine foundation 1170x585 - Articles
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.
Substation Crushed Rock for Safety ELEK Software 1 min 1 1170x585 - Articles
4 mins read

Why Crushed Rock is Laid in Substations

There are two reasons, according to the standards, why crushed rock or gravel is laid in substations, as explained in this article.
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