4 Essential Features of Transformer On-Load Tap Changer (OLTC)
On-load tap changers (or circuit tap changers), as the name suggests, permit tap changing and hence voltage regulation with the transformer on-load. Tap changing is usually done on the HV… Read more
Jan 28, 2015 | By Edvard Csanyi
Miniature Circuit Breakers (MCBs) For Beginners
This technical article focuses on the widely used miniature circuit breakers rated for 240 V or less. These are smaller and lower-rated versions of industrial-grade molded-case circuit breakers rated for… Read more
Jan 26, 2015 | By Edvard Csanyi
Sizing a Static UPS System In Data Center
Choosing the power of a static UPS system serving a data center is a decision that involves various elements and which cannot be made before, or independently from, the choice of… Read more
Jan 23, 2015 | By Edvard Csanyi
The most common LV/MV motor starting devices
The most common motor starting device is the low voltage motor-starting contactor. A contactor is defined as “a two-state ON-OFF device for repeatedly establishing and interrupting an electric power circuit.” Contactors are… Read more
Jan 14, 2015 | By Edvard Csanyi
The consumer power substation with metering on medium voltage side
A consumer power substation with metering on medium voltage side is an electrical installation connected to a utility supply system at a nominal voltage usually between 1kV – 35kV, which… Read more
Jan 12, 2015 | By Edvard Csanyi
4 Types of DC Motors and Their Characteristics
As you already know, there are two electrical elements of a DC motor, the field windings and the armature.The armature windings are made up of current carrying conductors that terminate… Read more
Jan 07, 2015 | By Edvard Csanyi
Hey engineers, wish you all the best in 2015!
Well, it’s been a long year with a lot of published technical articles and gained knowledge in the field of electrical engineering. EEP’s team payed special attention to the technical… Read more
Dec 29, 2014 | By Edvard Csanyi
Factors affecting transient stability – Faults analysis
A power system may be said to have transient stability if the various generating stations will regain equilibrium following a periodic system disturbances. System disturbances which cause the greatest trouble are those… Read more
Dec 24, 2014 | By Edvard Csanyi
8 NEC Basic Feeder Circuit Sizing Requirements
Once the branch circuit loads are calculated, the feeder circuit loads may be calculated by applying demand factors to the branch circuit loads. General Lighting Loads (Article 220.42) Show window… Read more
Dec 17, 2014 | By Edvard Csanyi
Danger And Control Of Static Electricity Buildup
It is necessary to study the static buildup potential of any workplace and institute protective measures to control such buildup. The following are the dangers posed by static electricity: Ignition… Read more
Dec 12, 2014 | By Edvard Csanyi
Clean vs dirty ground – Bonding of isolated, common & integrated grounding systems
In this article we covered in detail the physics related to lightning phenomenon and how the surges due to lightning strokes are safely conducted to ground using a lightning protection… Read more
Dec 05, 2014 | By Edvard Csanyi
Providing capacitive reactive compensation with shunt capacitor banks
Shunt capacitor banks are mainly installed to provide capacitive reactive compensation – power factor correction. The use of SCBs has increased because they are relatively inexpensive, easy and quick to… Read more
Dec 03, 2014 | By Edvard Csanyi
Electrical life (durability) of LV circuit breakers due to the switching operations
According to the standard IEC 947-2, there is actually no defined stipulation regarding the requirements of electrical life of a circuit breaker. The numbers of switching operations which a circuit… Read more
Dec 01, 2014 | By Edvard Csanyi
The most typical indices for measuring power quality disturbances
There are various methods for categorizing the severity of power disturbances. The most typical indices for measuring power quality disturbances are listed and explained below: Distortion factor Crest factor Notch… Read more
Nov 28, 2014 | By Edvard Csanyi
An overview of Wye and Delta solidly-grounded systems
The solidly-grounded system is the most common system arrangement, and one of the most versatile. The most commonly-used configuration is the solidly-grounded wye, because it will support single-phase phase-to neutral… Read more
Nov 26, 2014 | By Edvard Csanyi