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Energy and Power

Energy and Power

Energy and Power

## How capacitors improve the power factor and how to calculate them?

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# Monthly Archive for: «July, 2015»

Electrical Lectures

# Practical Considerations of Transformer Heat and Noise

In addition to unwanted electrical effects, transformers may also exhibit undesirable physical effects, the most notable being the production of heat and noise. Transformer noise is primarily a nuisance effect,… Read more

Jul 31, 2015 | By Edvard Csanyi

Energy Efficiency

# 7 energy-efficiency improvement opportunities in lighting system

There are a lot of opportunities to optimise lighting system in (almost) any industrial facility. Seven practical energy-efficiency opportunities to reduce energy use cost-effectively are given below: Lighting controls Replace T-12 tubes… Read more

Jul 29, 2015 | By Edvard Csanyi

Energy and Power

# 13 Basic expressions often used in electrical testing

This is the simple list of basic terms you can often hear when testing and measurements of electrical installation (in general) is being performed. While experienced electrical engineers will find… Read more

Jul 27, 2015 | By Edvard Csanyi

Energy Efficiency

# Eleven energy-efficiency improvement opportunities in compressed air systems

Instrumentation consumes large amounts of compressed air at many individual locations in a textile plant, but these uses are susceptible to leakage. Most such leaks are at threaded connection points,… Read more

Jul 24, 2015 | By Edvard Csanyi

Electrical Lectures

# Essential Basics of Total Harmonic Distortion (THD)

For a signal y, the total harmonic distortion (THD) is defined by the equation: This definition complies with that of standard IEC 61000-2-2. Note that the resulting value may exceed… Read more

Jul 22, 2015 | By Edvard Csanyi

Energy and Power

# Two Circuit-Breaker Types For Automatic Disconnection Of the Supply

The Standard IEC 60364 prescribes automatic disconnection of the supply for protection against indirect contact. The protective device shall automatically disconnect the supply so that, in the event of a… Read more

Jul 20, 2015 | By Edvard Csanyi

Electric Motor

# Comparision of Direct-on-line (DOL) and Star-delta Motor Starting

Direct-on-line (DOL) starting Advantages Drawbacks Star-delta starting Advantages Drawbacks Comparision of DOL and Star-delta starting As the name suggests, direct-on-line starting means that the motor is started by connecting it… Read more

Jul 17, 2015 | By Edvard Csanyi

Electrical Lectures

# What can a PLC do? Why do we use them?

“PLC” means “Programmable Logic Controller”, that’s clear. The word “Programmable” differentiates it from the conventional hard-wired relay logic. It can be easily programmed or changed as per the application’s requirement…. Read more

Jul 15, 2015 | By Edvard Csanyi

Cables

# Differences in size and weight of equipment using copper and aluminium conductors

It is a common misconception that electrical equipment built using aluminum conductors will always be larger than the same equipment using copper conductors. While the actual conductor within the equipment… Read more

Jul 13, 2015 | By Edvard Csanyi

Energy and Power

# MV Metal-Enclosed Switchgear and Loss of Service Continuity (LSC) Categories

Some parts of a switchgear may be made accessible for the user, for various reasons from operation to maintenance, and such an access could impair the overall operation of the… Read more

Jul 10, 2015 | By Edvard Csanyi

Energy Efficiency

# Maintenance of electrical equipment in buildings

Apart from safety, maintenance is needed to keep plant in an acceptable condition. Maintenance of this kind must be reviewed on an economic and energy efficiency basis. While it is… Read more

Jul 08, 2015 | By Edvard Csanyi

Industrial Automation

# Let’s develop the simple PLC program for lighting control system

A lighting control system is to be developed. The system will be controlled by four switches, SWITCH1, SWITCH2, SWITCH3, and SWITCH4. These switches will control the lighting in a room… Read more

Jul 06, 2015 | By Edvard Csanyi

Medium Voltage

# Medium Voltage Earthing Systems – Arrangements and Comparison

First, let’s define the different medium voltage earthing systems and then compare the advantages and disadvantages of each one. Earthing systems in medium voltage can be differentiated according to the… Read more

Jul 03, 2015 | By Edvard Csanyi