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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
A graph showing the power station's voltage.
6 mins read

Earthing Software Benchmark Study

The Annex H in IEEE Standard 80-2013 contains benchmark case results for comparing and evaluating software tools and methodologies used for the analysis of substation earthing. The results compare the simple equations from IEEE Std 80 with the results given by some of the commercially available software such as CDEGS, ETAP, SGW, SDWorkstation and WinIGS.
HV Cables Single Cores in the Ground 1170x585 - Articles
2 mins read

Neutral Conductor Sizing

The neutral conductor is required for each primary circuit, and there are rules in the Standards for its sizing.
Solar panels on Sydney building 1 1170x585 - Articles
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.
Graph comparing the relationship between distance and resistance in electrical systems and renewable energy sources.
9 mins read

Testing of Earthing Systems

Provides test procedures based on the fall of potential method and actual touch and step voltage measurements for the purpose of validating a safe earthing design. Includes procedures for both large or small earthing systems, safety requirements (for undertaking the tests) and recommended testing equipment.
shutterstock 188769602 1170x585 - Articles
12 mins read

Fundamentals of Earthing Design

Key earthing design concepts covered including Grid Potential Rise, design to reduce touch and step voltages, fault current distribution, effects of soil resistivity and use of rods to improve safety along with calculation and modelling examples.
LV Power Cables on Drums small ELEK Software 1170x585 - Articles
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.
ELEK Software Touch and Step Voltages to IEEE and IEC Standards 1170x585 - Articles
8 mins read

Safety Limit Calculations to IEEE and IEC Standards

A safe earthing system design has two objectives; to provide a means to carry normal and fault current without exceeding equipment limits or adversely affect continuity of service and to reduce the risk of a person in the vicinity of an earthed facility being exposed to the danger of a critical electric shock.
A diagram illustrating the cellular process of a cell cycle.
5 mins read

Understanding Earth Fault Loop Impedance

The purpose of this document is to provide a better understanding of Fault Loop Impedance, also referred to as Earth Fault Loop Impedance so that the requirements of AS/NZS 3000 Wiring Rules for safety, design, installation and testing of electrical installation may be met.
Electrician installing power cable 1170x585 - Articles
2 mins read

Voltage drop limits for Low Voltage installations

Voltage Drop Limits per the Wiring Rules AS/NZS 3000 as well as rules of thumb to assist with electrical design. Includes AC and DC voltage drop or rise limits.
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