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Technical Articles

Transformers

12 Main Classes Of Power Transformer

Transformers are used for a wide variety of purposes, with the complete range of voltage and power ratings as well as many special features for particular applications. The following covers… Read more

Jan 08, 2012 | By Edvard Csanyi

SIEMENS - View of the main production hall of the Nuremberg transformer plant.
Electric Motor

How to select AC converter for VSD?

Altough manufacturers’ catalogues try to make it easy as possible, there are many variables associated with the selection and rating of the optimum electric motor and AC converter for a… Read more

Jan 06, 2012 | By Edvard Csanyi

Variable Speed Drives (VSD's) used for submersible pumps
Renewable Energy

Photovoltaic End-Use Application Markets

Photovoltaic markets can be classified based on the end-use application of the technology. The most common PV projects are off-grid applications. Water pumping also represents an important application of PV,… Read more

Jan 04, 2012 | By Edvard Csanyi

Photovoltaic End-Use Application Markets
Medium Voltage

ABB MV Switchgear – Single Busbar Or Double Busbar?

Most switchgear installations used in industry with normal service conditions are based on single busbar arrangements. Compared to double busbar switchgear, single busbar switchgear is definitely easier to use, readily understood… Read more

Jan 03, 2012 | By Edvard Csanyi

ABB Switchgear - single busbar or double busbar?
Energy and Power

The Need for Breaker Failure Protection

Circuit breakers are strategically located in power systems to connect circuits and electrical apparatus. Circuit breakers are commanded to open and close by protection and control systems that monitor conditions… Read more

Jan 01, 2012 | By Edvard Csanyi

Eaton - Magnum circuit breaker
Electric Motor

NEC Code for Size of Cable for Motor

Size of Cable for Branch circuit which has Single Motor connection is 125% of Motor Full Load Current Capacity. What is the minimum rating in amperes for Cables supplying 1… Read more

Dec 30, 2011 | By jiguparmar

Motor terminal box
Electric Motor

The Cage Induction Motor Explained In Details

This simplest form of AC induction motor or asynchronous motor is the basic, universal workhorse of industry. Its general construction is shown in Fig. 1. It is usually designed for… Read more

Dec 29, 2011 | By Edvard Csanyi

Three phase squire cage induction motor, fully enclosed and fan-cooled
Protection

Transformer Protection – Abstract from NEC

According to NEC 450.4, “each transformer 600 volts, nominal, or less shall be protected by an individual overcurrent device installed in series with each ungrounded input conductor.” Such overcurrent device… Read more

Dec 26, 2011 | By jiguparmar

Transformer protection - Aabstract from NEC (National Electric Code)
Industrial Automation

PROFIBUS at a Glance

PROFIBUS is an open, digital communication system with a wide range of applications, particularly in the fields of factory and process automation. PROFIBUS is suitable for both fast, time-critical applications… Read more

Dec 24, 2011 | By Edvard Csanyi

PROFIBUS - Optical connection
Electric Motor

Motor starting problem and high motor inrush currents

Electric motor protection device depends on the accurate and correct selection of overload(s), fuses and/or circuit breakers. Over the years the protective devices have been selected according to the applicable… Read more

Dec 23, 2011 | By Edvard Csanyi

Allen Bradley Motor Controller/Starter Bucket


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