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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
Crushed blue metal rock and foundation in switchyard 1 1170x585 - Popular
3 mins read

Surface Material Resistivity

This article provides typical values for surface layer resistivity to be used for earthing and ground electrical calculations of touch and step voltages.
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.
Screenshot of high voltage cable rating software
7 mins read

CYMCAP vs. ELEK Cable HV Software

The features of ELEK Cable HV software and CYMCAP software are compared in detail.
Infographic on power systems earthing standards, featuring diagrams and guidelines for substation earthing, touch/step voltage limits, and testing. Includes industry logos and software ad.
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.
Attention power cables in the ground ELEK Software 1170x585 - Popular
2 mins read

The 4 Main Causes of HV Cable Failures

A report investigated 6214 cable failures over a 14 year period. The main causes were insulation breakdown, excavation, joints or switchgear failure. The results may surprise you.
High voltage power cable with copper conductors
8 mins read

Achieving Accurate High Voltage Cable Current Ratings

Accurate high voltage cable current ratings achieved - ELEK Cable HV software matches CIGRE TB 880 and performs IEC 60287 compliant calculations.
Several black cables are laid in a trench dug through dry soil at a construction site, with metal posts and flagged stakes visible in the background.
6 mins read

Designing Solar PV Cable Trenches to Prevent Overheating

Prevent solar PV cable overheating with proper trench design. Learn how cable spacing, soil thermal resistivity, and backfill impact ampacity. Case study included.
A diagram of a set of test tubes on a table with power.
3 mins read

Concrete-encased Earthing Rods

Metal earthing rods that are encased inside concrete will have a lower resistance. Concrete has a typical electrical resistivity of between 30 Ohm.m to 200 Ohm.m.
ELEK Software GIS Substation by Siemens 1170x585 - Popular
3 mins read

Earthing modelling of concrete slabs

Switchgear in substations is installed on top of concrete slabs containing substantial quantities of steel reinforcement. Often the embedded steel reinforcement is bonded to the main earthing system and used to cost-effectively improve earthing electrical performance and safety.
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