Search

Black Friday Offer!

Get 20% OFF on Pro Premium membership and video courses & bundles with discount code BLACKFRIDAY21 (expires on Dec 3rd).

Technical Articles

Electric Motor

Motors for Hazardous Areas

Electrical drives/motors that are operated in hazardous areas must be built and engineered so that they cannot become an ignition source. This applies not only to normal operating and starting, but also… Read more

Nov 02, 2012 | By Edvard

Motors for Hazardous Areas
Protection

Transformer Differential Protection Principles

Similar to bus protections, transformers are protected by differential relays. Inter-winding faults (short circuits) and ground faults within power transformers can be detected by this protection scheme. Failure to detect… Read more

Nov 01, 2012 | By Edvard

Transformer Differential Protection Principles
Energy and Power

Application of 4-pole Switchgear Devices

The majority of low-voltage switchgear is equipped with three contacts in the main circuit, which switch three-phase loads in all poles. In some applications switchgear with four main poles is… Read more

Oct 31, 2012 | By Edvard

Application of 4-pole Switchgear Devices
Transformers

Transformers Are Never Silent

Yes, we all know that transformers are never silent. This is actually quite impossible, but in an environmentally aware, highly regulated world, the issue is not the level of noise,… Read more

Oct 29, 2012 | By Edvard

A three-phase oil transformer 225 MVA, 275 kV
Cables

Short Overview of LV Cable Terminations

A termination is the electrical and physical connection of a cable end to a piece of equipment or another cable. A splice is the electrical connection of a cable end to… Read more

Oct 27, 2012 | By Edvard

LV Cable terminations - Short Overview
Electric Motor

Industrial Applications of Brushless Servomotor

A synchronous machine with permanent magnets on the rotor is the heart of the modern brushless servomotor drive. The motor stays in synchronism with the frequency of supply, though there… Read more

Oct 26, 2012 | By Edvard

Industrial Applications of Brushless Servomotor
Cables

Corrosion Types Encountered With Power Cables

Introduction Anodic Corrosion (Stray DC Currents) Cathodic Corrosion Galvanic Corrosion Chemical Corrosion AC Corrosion Local Cell Corrosion Other Forms of Corrosion There are numerous types of corrosion, but the ones… Read more

Oct 25, 2012 | By Edvard

Corosion Types Encountered With Power Cables
Energy and Power

Safety Clearance Recommendations for Transformer

Clearance from Outdoor Liquid Insulated Transformers to Buildings (NEC) Clearance between Two Outdoor Liquid Insulated Transformers (NEC) Dry Type Transformer in Indoor Installation (NES 420.21) Dry Type Transformer in Outdoor… Read more

Oct 24, 2012 | By jiguparmar

Safety Clearance Recommendations for Transformer
Cables

The Good, The Bad and The Ugly Cable Insulation

The fundamental understanding of cable insulation properties forms the foundation for assessment of cable operability. These same fundamentals provide the basis for evaluating whether various electrical and physical tests and… Read more

Oct 23, 2012 | By Edvard

The Good, The Bad and The Ugly Cable Insulation
Electric Motor

Few Words About Three-Phase Alternator

The three-phase alternator, as the name implies, has three single-phase windings spaced such that the voltage induced in any one phase is displaced by 120º from the other two. A… Read more

Oct 20, 2012 | By Edvard

Few Words About Three-Phase Alternator
Energy and Power

Testing and Commissioning of Current Transformer

1. Objective 2. Test Equipment Required 3. Test procedures Mechanical Check and Visual Inspection Insulation Resistance Test Polarity Test Secondary/Loop Resistance Test Burden Test (optional test) Magnetization Curve Test (optional… Read more

Oct 19, 2012 | By Edvard

Testing and Commissioning of Current Transformer
Transformers

Definitions of Voltage Transformer Parameters

Rated voltage factor Rated primary voltage (Up) Rated secondary voltage Accuracy power Accuracy class Voltage ratio error Phase or phase displacement error Rated thermal limiting output The voltage transformer must… Read more

Oct 18, 2012 | By Edvard

Definitions of the Voltage Transformer Parameters


BLack Friday Offer: 20% OFF 🎀

Get 20% OFF on EEP Pro Premium membership and video courses & bundles with discount code BLACKFRIDAY21 (expires on December 3rd).

Subscribe to Newsletter

Subscribe to our Weekly Digest newsletter and receive free updates on new technical articles, video courses and electrical guides.