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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 technician wearing black gloves uses a multimeter to test wiring connections inside an electrical control panel.
8 mins read

Step-by-Step Arc Flash Calculation: Real-World Example Using IEEE Standard 1584

All steps of a real-world arc flash calculation example of a low-voltage AC installation with transformer, main switchboard, and distribution boards are explained.
Soil resistivity measurements using Wenner method 1 1170x585 - Popular
3 mins read

Typical Values of Soil Resistivity

Soil electrical resistivity varies based on several factors. Use these tables to validate your soil measurements or devise a soil model without having measurements for preliminary earthing/grounding designs.
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.
Power Cables lineup 1170x585 - Popular
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.
Cable Pulling on Rollers 1 1170x585 - Popular
5 mins read

Cable Pulling Tension Calculations

This article explains how to perform cable pulling tension and sidewall pressure calculations and also includes an example.
Motors in a factory setting_ELEK Software
1 min read

Maximum Demand Tables

Reference tables for diversity factors and energy demand from Wiring Rules AS/NZ 3000 for domestic and non-domestic installations.
Cable trench being backfilled by an excavator 1170x585 - Popular
5 mins read

Typical Thermal Resistivity of Backfill Soils and Concrete

It's difficult to decide on the thermal resistivity of soil or backfill to use for cable rating studies. The typical thermal resistivities of common native soils and engineered materials used as backfills for buried cables are provided in tables.
1654491769111 1 1170x585 - Popular
12 mins read

Solar PV systems – DC cable sizing with examples

DC cable sizing has significant implications on a PV system's performance, total cost, and safety. Example calculations of Current Rating and Voltage Rise have been provided.
Lightning strike on substation 1 1 1170x585 - Popular
6 mins read

Lightning Protection Design for Substations

Direct lightning strikes to substations causes physical damage and poses hazards for people.
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