Energy and Power
How a three-phase power transformer responds to harmonics
The way in which a three-phase transformer responds to harmonics depends on the connection configuration used. For a star-star configuration, any imbalance in the phase currents results in the star point being electrically displaced and the phase to neutral voltages… Read more
Feb 15, 2017 | By Edvard Csanyi
Electric Motor
Detailed calculation of currents and power according to the type of load
Currents and power analysis are key factors in any design or redesign of an installation they will enable the source(s) to be sized according to the purpose of the installation, the intended use of the circuits and the receivers to… Read more
Feb 13, 2017 | By Edvard Csanyi
Energy and Power
Four typical designs for connecting generator set(s) to the low voltage system
Many different system designs are possible, but for highest reliability, systems are typically configured so that generator set(s) are connected at low voltage, with the minimum number of transformers and circuit breakers between the generator set and load to be… Read more
Feb 08, 2017 | By Edvard Csanyi
Energy and Power
The easiest way to measure ground resistance using clamp meter, but be carefull!
The ground clamp meter / tester is an effective and time-saving tool when used correctly because the user does not have to disconnect the ground system to make a measurement or place probes in the ground. The method is based… Read more
Feb 06, 2017 | By Edvard Csanyi
Energy and Power
Single line diagrams of emergency and standby power systems with automatic transfer switch (ATS)
Emergency and standby power systems are generally designed into the over-all electrical system for one of the following two reasons: Legal Requirements – As required by the NEC, NFPA 101, NFPA 99 and other local, state, and federal codes and requirements…. Read more
Feb 03, 2017 | By Edvard Csanyi
Energy and Power
Twelve golden rules for specifying and implementing a good SCADA system
A successful SCADA specification and good installation depend on choosing and utilizing proven and reliable technology, with adequate and comprehensive training of all personnel in the operation of the system. Whilst one should rightly anticipate significant development and maintenance savings by… Read more
Jan 23, 2017 | By Edvard Csanyi
Energy and Power
4 example calculations of compensation for reactive power
First, let’s say some words about basics of the reactive power in system. Reactive current arises in every electrical system. Not only large loads, but smaller loads as well require reactive power. Generators and motors produce reactive power, which causes unnecessary… Read more
Jan 20, 2017 | By Edvard Csanyi
Electrical Lectures
Basic three phase power measurements explained in details
Although single-phase electricity is used to supply common domestic and office electrical appliances, three phase alternating current (a.c.) systems are almost universally used to distribute electrical power and to supply electricity directly to higher power equipment. This technical article describes… Read more
Jan 13, 2017 | By Edvard Csanyi
Energy and Power
31 practical do’s and don’ts to avoid loud transformer humming
The user thinking of loud transformer humming (practically noise) should start at the conceptual stage. If he can, he must consider if he has a noise problem before he specifies his transformer. If he does, a noise survey including frequency… Read more
Jan 06, 2017 | By Edvard Csanyi
Energy and Power
Selection of distribution transformers for supplying power to LV networks
The characteristic data of distribution transformers are determined by the requirements of the network. The effective power determined must be multiplied by the power factor cosφ to give the rated power SrT. In distribution networks the value uk= 6% is preferred…. Read more
Jan 04, 2017 | By Edvard Csanyi
Energy and Power
Respect Murphy’s Law and don’t remote control all systems via SCADA
Every technology has applications for which it seems admirably suited, other applications for which it seems only marginally suited, and a group of applications for which it simply should not be used. When a technology is very young, it is… Read more
Jan 02, 2017 | By Edvard Csanyi
Energy and Power
Say hello to new challenges in 2017! Engineers, Happy New Year!
Well engineers, it’s been a long year 2016. A lot of good things happened in the last 365 days. The most important for me personally and EEP are you – electrical engineers who regularly visit portal and your gratitude expressed… Read more
Dec 31, 2016 | By Edvard Csanyi
Energy and Power
Four essential ingredients of an electrical power system
Generally speaking, you must agree that electrical power system is a complex project consisting of the four main ingredients. Now, let’s observe each ingridient in details: Electricity supply Transmission Distribution Loads All countries now have available some supplies of electricity… Read more
Dec 30, 2016 | By Edvard Csanyi
Energy and Power
Thumb rules for installing AC converter into metal enclosure
If the environmental conditions are likely to exceed normal working ranges of an AC converter, then arrangements should be made to provide additional cooling and/or environmental protection. The temperature limits of an AC converter are far more critical than those… Read more
Dec 19, 2016 | By Edvard Csanyi
Energy and Power
Six wiring and grounding problems that lead to low power quality
In this technical article, typical wiring and grounding problems, as related to power quality, are presented. Possible solutions are given for these problems as well as the possible causes for the problems being observed on the grounding system. (See Table 2 at… Read more
Dec 14, 2016 | By Edvard Csanyi
