Energy and Power
Which type of residual current device (RCD) you should use for protection?
It is not quite clear when and by whom the first residual current device (RCD) was developed, but it certainly appeared on the market in the 1950s and was initially used by some utility companies to fight “energy theft” due… Read more
Jul 28, 2016 | By Edvard Csanyi
Energy and Power
How standby generators work and how to dimension them?
Standby generators are used in order to provide consumers in the system entitled to standby service in the event of breakdown or shutdown of the normal power supply. They consist of the generator, the flywheel and the motor. For the… Read more
Jul 26, 2016 | By Edvard Csanyi
Electrical Lectures
Challenge your electrician skills with these 15 questions
Whether you are professional or a novice in a field of electrical engineering, it’s always a good idea to challenge your electrician skills from time to time. This is your small opportunity to pinpoint your strengths and weaknesses and to… Read more
Jul 25, 2016 | By Edvard Csanyi
Power Substation
What is distribution substation and its main components?
Distribution substation typically operates at 2.4 – 34.5 kV voltage levels, and deliver electric energy directly to industrial and residential consumers. Distribution feeders transport power from the distribution substations to the end consumers’ premises. These feeders serve a large number of premises… Read more
Jul 22, 2016 | By Edvard Csanyi
Energy and Power
Earthing in DC distribution systems similar to the AC systems
This technical article shows earthing of a specific pole of a two-wire DC distribution systems. The decision whether to earth the positive or the negative pole shall be based upon operational circumstances on site or other considerations. The Standard IEC… Read more
Jul 20, 2016 | By Edvard Csanyi
Low Voltage
Few good tips for low voltage switchgear maintenance and care
The low voltage switchgear involves many devices like power circuit breakers, MCBs, aux. relays, CTs, VTs etc. and of course at the end – enclosures (indoor or outdoor type). The frequency of inspection and maintenance of low voltage switchgear should be… Read more
Jul 18, 2016 | By Edvard Csanyi
Electrical Lectures
The essentials of AC power transformers for students and beginners
AC power transformers are one of the keys to allowing widespread distribution of electric power as we see it today. Transformers efficiently convert electricity to higher voltage for long distance transmission and back down to low voltages suitable for customer… Read more
Jul 15, 2016 | By Edvard Csanyi
Energy and Power
Electricity and water do not form a happy partnership, do they?
Electricity and water do not form a happy partnership and so it is often necessary to “dry out” insulation. This may be done to remove surface moisture or perhaps to drive moisture from the internals of the insulation. Indeed some… Read more
Jul 13, 2016 | By Edvard Csanyi
Protection
Commissioning tests of protection relays at site (before set to work)
Installation of protection relays at site creates a number of possibilities for errors in the implementation of the scheme to occur. Even if the scheme has been thoroughly tested in the factory, wiring to the CTs and VTs on site… Read more
Jul 11, 2016 | By Edvard Csanyi
Electrical Lectures
The basics of power in alternating current circuits (you MUST NEVER forget)
In a DC circuit, the power is equal to the voltage times the current, or P=V×I. This is also true in an AC circuit when the alternating current and voltage are in phase. That is, when the circuit is resistive…. Read more
Jul 08, 2016 | By Edvard Csanyi
Electrical Lectures
How do you become a master electrician?
There are a number of differences between the Journeyman test and the Master electrician exam. Generally speaking, the test for the Master electrician’s exam has more questions, lasts longer and includes more advanced electrical fundamentals and formulas. I have already briefly… Read more
Jul 05, 2016 | By Edvard Csanyi
Energy and Power
Why is Good Grounding Important And What Can You Do About It?
The transient nature of lightning with its associated fast rise times and large magnitude currents mean that special consideration needs to be given to the good grounding, for lightning protection to be effective. Many factors such as soil resistivity variations,… Read more
Jul 04, 2016 | By Edvard Csanyi
Datacenters
Electrical Design Project Of Sun’s Datacenter In Santa Clara, California
This technical article provides a top-to-bottom overview of Sun Microsystems’s Santa Clara, California datacenter from electrical design aspect. Sun’s electrical design tour of Santa Clara datacenter is done through a series of single line diagrams. These diagrams illustrate the various components… Read more
Jul 01, 2016 | By Edvard Csanyi
