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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
Earthing Design Software Screenshot
11 mins read

7 Best Earthing and Grounding Design Software Packages

We compare the best and latest earthing and grounding system design software including SafeGrid, CDEGS, XGSLab, ETAP and more based on technical features and compares price.
Screenshot of cable sizing calculator software named Cable Pro Web
4 mins read

JCalc vs Cable Pro Web: A Complete Comparison

Cable Pro Web is cheaper with more features than JCalc (which is not free). Choose cable sizing software that scales with your business. This article honestly compares prices, features and ease of use.
Cable laying vessel lays cable at sea for an offshore wind farm 1170x585 - Popular
10 mins read

Submarine Power Cable Current Ratings (2025 update)

The calculation of submarine cable current ratings is different from land cables due to their complex construction and installation conditions.
ELEK Software Vehicle Charging Station 1170x585 - Popular
3 mins read

Touch Voltage Calculations for LV Electrical Systems

The definition of “touch voltage” is the voltage between accessible exposed and extraneous conductive parts that may lead to the risk of electric shock in the event of an electrical fault. This article covers AS/NZS 3000, BS 7671, and NFPA 70E rules concerning touch voltages and provides the equations for calculations.
ELEK Software Grounding Earthing cables on copper bar 1 1170x585 - Popular
6 mins read

Protective Earth Cable Sizing

This article explains how to properly size earth conductors for earth faults and includes the method, equations, constants you can use and worked examples to follow.
Arc Flash Draw Out Large Circuit Breaker ELEK Software small 1 1170x585 - Popular
8 mins read

Understanding Arc Flash Hazards

Electrical equipment operating at or above 50 V AC or 120 V DC which will not put into a deenergised state during work must be evaluated for arc flash and shock protection. Three types of activities of workers carry the highest risk of arc flash. Three main factors determine the severity of an arc flash injury.
figure 4 1170x585 - Popular
10 mins read

Magnetic Fields from High Voltage Power Cables

This article analyses the magnetic fields produced by electrical power cables installed in various configurations under varying conditions in the context of a health and safety-related issue. A software program has been used for calculating the results based on the Biot-Savart law. Techniques for the mitigation of magnetic fields are also presented.
Illustration of two electrical cables: one with a single copper conductor and the other with multiple layers including insulation, shielding, and a copper conductor.
9 mins read

Ampacity Calculations for Southwire Power Cables

We performed ampacity calculations for hundreds of industrial and utility power cables from Southwire. The assumptions used for modelling in the software are explained. The calculated ampacities were all within 3 % of the values given in ICEA and NEC standards.
Copper earthing grid conductors buried
4 mins read

Resistance of Earthing Rods and Rod Beds

Earthing rods improve earthing systems when driven into low resistivity soil layers. Due to the proximity effect the rule of thumb is earth rods should be separated by at least their driven length. Rods may be encased in concrete to lower their resistance. Equations are provided for hand calculations and these have been validated with numerical software.
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