Energy and Power
Calculating Max. Demand Kilovolt-Amperes and Required Cable Current Rating
A building site is to have the following electrical equipment available for use: Tower crane, electric motors totalling 75 kW at 415 V; Sump pump, 5 kW at 240 V; 60 tungsten lamps of 100 W each at 240 V;… Read more
Feb 02, 2015 | By Edvard Csanyi
Energy and Power
Important generator set (genset) rating considerations
A generator set (genset) consists of an engine and a generator and it is best to consider each of them as a system. Individually, each has unique characteristics, but together these qualities have a significant impact on the performance and sizing of the genset… Read more
Jan 30, 2015 | By Edvard Csanyi
Energy and Power
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 winding for two reasons: Because the currents are lower, the… Read more
Jan 28, 2015 | By Edvard Csanyi
Electrical Lectures
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 600 V or less. These miniature breakers, called air circuit… Read more
Jan 26, 2015 | By Edvard Csanyi
Datacenters
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 distribution scheme. The main elements to consider can be summarised… Read more
Jan 23, 2015 | By Edvard Csanyi
Electric Motor
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 designed for optimum performance and lifetime when switching loads; they… Read more
Jan 14, 2015 | By Edvard Csanyi
Energy and Power
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 for example may supply a single MV/LV transformer (exceeding generally 1250… Read more
Jan 12, 2015 | By Edvard Csanyi
Electric Motor
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 at a commutator. DC voltage is applied to the armature… Read more
Jan 07, 2015 | By Edvard Csanyi
Energy and Power
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 articles related to power substations and industry automation from the… Read more
Dec 29, 2014 | By Edvard Csanyi
Energy and Power
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 due to line faults. A line fault, in addition to the… Read more
Dec 24, 2014 | By Edvard Csanyi
Electric Motor
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 or track lighting (Article 220.43) Receptacles in other than dwelling… Read more
Dec 17, 2014 | By Edvard Csanyi
Energy and Power
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 causing fire or explosion Damage to sensitive electronic components Electric… Read more
Dec 12, 2014 | By Edvard Csanyi
Energy and Power
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 system consisting of air terminations, down conductors and grounding electrodes…. Read more
Dec 05, 2014 | By Edvard Csanyi
Energy and Power
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 install and can be deployed virtually anywhere in the network…. Read more
Dec 03, 2014 | By Edvard Csanyi
Energy and Power
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 breaker under no-load, normal load, overload and short-circuit conditions has… Read more
Dec 01, 2014 | By Edvard Csanyi
