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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
2 mins read

Wind Farm Dynamic Cable Ratings

This article explains why dynamic ratings are important when dealing with long AC cables for wind farms. An example calculation of a dynamic rating which uses the measured load profile is given.
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.
3 mins read

Earth Grid Design for Frozen Soils

Soil resistivity is one of the most critical factors affecting earthing and grounding system performance and safety. In cold climates, the top-soil layers may be frozen during the winter or spring seasons, and resistivity may increase to as high as 10,000 Ω.m in the frozen soil layers. This can give rise to significant touch voltage hazards during an earth fault.
1 min read

What Happens During Substation Earth Grid Faults?

During an earth fault on a substation earth grid, the flow of current to the earth will produce voltage gradients. An earth grid that is properly designed will safely dissipate current into the ground.
1 min read

Accurate voltage drop calculations

Accurately calculating voltage drop results in lower voltage drops which leads to smaller cable sizes and saves money.
3 mins read

Effects of Controlled Backfills on Cable Current Ratings

The effects on the current rating of cables buried in soils with different thermal resistivities are examined with software using the finite element technique.
3 mins read

Modelling Wind Turbine Earthing Grid in 3D

This tutorial is designed to help users of SafeGrid Earthing Software to learn about and practice the application of powerful operating principles.
2 mins read

Save 75 % time and $3,366 using Cable Sizing Software

Accurately calculating voltage drop and cable size will save you time and money. We show you How and Why.
2 mins read

Telecomm Mobile Repeater Station

The following tutorial is designed to help users of SafeGrid Earthing Software to learn about and practice the application of powerful operating tools and principles.
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