Industrial Automation
Few Words About Frequency Converters
Since the late 1960’s, frequency converters have undergone extremely rapid changes, largely as a result of the development of microprocessor and semi-conductor technologies and their reduction in prices. However, the basic principles of frequency converters remains the same. Frequency converters can be divided into… Read more
Nov 21, 2012 | By Edvard Csanyi
Wind Power
Wind power applications, Grid connected or not?
There are perhaps four distinct categories of wind power which should be discussed. These are: Small, non-grid connected Small, grid connected Large, non-grid connected Large, grid connected By small, we mean a size appropriate for an individual to own, up… Read more
Nov 20, 2012 | By Edvard Csanyi
Electric Motor
Stator Overheating Protection
All motors need protection against overheating resulting from overload, stalled rotor, or unbalanced stator currents. For complete protection, three-phase motors should have an overload element in each phase. This is because an open circuit in the supply to the power… Read more
Nov 19, 2012 | By Edvard Csanyi
Industrial Automation
How to Select Right Frequency Converter for Variable Speed Drive (VSD)?
Selecting of a frequency converter for variable speed drives requires a lot of experience. If the experience is not available, it is often useful to visit either a reference plant with similar applications, or exhibitions or trade shows. The following is a… Read more
Nov 17, 2012 | By Edvard Csanyi
High Voltage
The Purpose of High Voltage Circuit Switchers
Circuit switchers have been developed to overcome some of the limitations of fusing for substation power transformers. Circuit switchers have SF6 gas interrupters and are designed to provide three-phase interruption (solving the unbalanced voltage considerations) and to provide protection for… Read more
Nov 16, 2012 | By Edvard Csanyi
Energy and Power
What’s common for Beer Mug and Power Factor?
Understanding power factor is not that hard. We have some very common example from the real life you will understand for sure, but first let’s start with some introduction of power factor. To understand power factor, we’ll first start with… Read more
Nov 15, 2012 | By Edvard Csanyi
High Voltage
Electrical Safety Standards for LV/MV/HV (Part-3)
Continued from part 2 – Electrical Safety Standards for LV/MV/HV (Part-2) Standard: Northern Ireland Electricity (NIE), 6/025 ENA Code: Indian Electricity Rules / Central Electricity Authority Right of Way Clearance (As per GETCO Standard) Minimum clearances between Electrical Lines crossing… Read more
Nov 14, 2012 | By Jignesh Parmar
Protection
Principles and Characteristics of Distance Protection
Distance relays are one of the most important protection elements in a transmission line. These relays may sometimes be set based in percentages of the line impedances, for example a typical setting for zone 1 is 80% of the impedance… Read more
Nov 13, 2012 | By Edvard Csanyi
High Voltage
Electrical Safety Standards for LV/MV/HV (Part-2)
Continued from part 1 – Electrical Safety Standards for LV/MV/HV (Part-1) Standard: Northern Ireland Electricity (NIE), 6/025 ENA Clearances of Electrical Line to Ground and Roads Clearances of Electrical Line to Other Objects Clearances of Electrical Line to Trees and… Read more
Nov 12, 2012 | By Jignesh Parmar
Power Substation
Steps to Ensure Effective Substation Grounding (Part 2)
Continued from previous article: Steps to Ensure Effective Substation Grounding (1) In previous technical article (part 1) was explained first five steps that will ensure a reliable, safe and trouble-free substation grounding system. Here we will explain the last six steps:… Read more
Nov 10, 2012 | By Edvard Csanyi
Power Substation
Steps to ensure effective substation grounding (Part 1)
An electrical substation is a critical resource in a power system. Safe operation of a substation calls for a properly designed and installed grounding system. A well-designed grounding system will ensure reliable performance of the substation over its entire service life. How does… Read more
Nov 09, 2012 | By Edvard Csanyi
Lighting
How to Dim LED Lighting in the Home?
LED lighting in the home is becoming more popular due to the energy and money saving benefits it offers over traditional halogen lighting. One of the most common problems that an electrician faces when installing LED’s is enabling them to… Read more
Nov 08, 2012 | By Joe Watts
High Voltage
Electrical Safety Standards for LV/MV/HV (Part-1)
Standard: Western Power Company Water Safely Clearance on Electrical Fires Minimum Approach Distance for Authorized Person Minimum Approach Distance for Ordinary Person Minimum Approach Distance for Vehicle and Plant for Ordinary Person . Standard: New Zealand Electrical Code Min. Safe… Read more
Nov 07, 2012 | By Jignesh Parmar
Electric Motor
Few Words About Synchronous Machines
There are two main types of synchronous machine: cylindrical rotor and salient pole. In general, the former is confined to 2 and 4 pole turbine generators, while salient pole types are built with 4 poles upwards and include most classes… Read more
Nov 06, 2012 | By Edvard Csanyi
Energy and Power
Aluminium and its Alloys used in Electrical Engineering
Aluminium has been used for many years as a conductor material in almost all branches of electrical engineering. In addition to the pure aluminium, several its alloys are also excellent conductors, combining structural strength with an quite acceptable conductivity. Aluminum… Read more
Nov 05, 2012 | By Edvard Csanyi
