High Voltage Cable Design

July 8, 2024

5 mins read

Temperature Limits for XLPE Insulated Cables

The widely accepted maximum operating temperature of XLPE insulated power cables under “normal use” conditions is 90 ˚C. During emergencies, the temperature of a buried cable may be permitted to exceed this temperature. The duration considered for such emergencies ranges from 10 minutes up to 15 days. In many countries, XLPE-insulated cables are allowed to operate up to 100-105 ˚C for short durations.

High Voltage Cable Design

October 30, 2020

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.

Earthing Design

October 18, 2021

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.

Low Voltage Design

April 22, 2021

9 mins read

Protection Coordination Requirements from Standards

There are several international Standards (AS/NZS, BS and IEC) which cover requirements for protection coordination of low voltage electrical systems and this article provides a summary of those as a reference.

Low Voltage Design

October 22, 2021

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

May 30, 2022

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.

Low Voltage Design

April 2, 2020

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.

High Voltage Cable Design

February 27, 2025

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.

Earthing Design

January 6, 2025

4 mins read

Standards for Power Systems Earthing Design

Experienced electrical engineers created this reference list of standards for power systems earthing/grounding for substations, renewable energy, etc.

Power Systems Technical Articles

Choose the article category

Temperature Limits for XLPE Insulated Cables

Magnetic Fields from High Voltage Power Cables

7 Best Earthing and Grounding Design Software Packages

Protection Coordination Requirements from Standards

Protective Earth Cable Sizing

Typical Working Distances for Arc Flash Calculations

Voltage Rise Calculations

Submarine Power Cable Current Ratings (2025 update)

Standards for Power Systems Earthing Design

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