Five protection relay types used to detect grid disturbances and isolating
Consider a medium voltage distribution system having local generation (e.g., captive power generation) as shown in figure 1 which is also synchronized with the grid. During grid disturbance, if plant generators… Read more
Mar 29, 2017 | By Edvard Csanyi
Top six solutions to achieve a high level of energy efficiency in buildings
Energy efficiency in commercial buildings involves providing a given level of performance, cost, quality, availability, and comfort at a minimal level of energy usage throughout the lifecycle of a given… Read more
Mar 27, 2017 | By Edvard Csanyi
Installation, protection and connection of capacitor banks
In an low voltage electrical installation, capacitor banks can be installed at three different levels: Global installation Segment (or group) installation Individual (or single) installation After installation ways, we’ll discuss about… Read more
Mar 20, 2017 | By Edvard Csanyi
What is the complex power and how it figures in power analysis
Considerable effort has been expended over the years to express power relations as simply as possible. Power engineers have coined the term complex power, which they use to find the… Read more
Mar 17, 2017 | By Edvard Csanyi
Three performance factors you must consider when sizing batteries
Batteries need to be sized correctly to be able to feed the required load for the required time, and a number of factors need to be decided to be able… Read more
Mar 10, 2017 | By Edvard Csanyi
The essentials of synchronous machines in power distribution networks
Synchronous machines can be used as generators or motors. They are of 3-phase construction, even though some special exceptions can be found. A bulk of the applications are within power… Read more
Mar 06, 2017 | By Edvard Csanyi
Voltage drop calculation methods with examples explained in details
The first consideration for voltage drop is that under the steady-state conditions of normal load, the voltage at the utilization equipment must be adequate. In addition to steady-state conditions, voltage… Read more
Mar 03, 2017 | By Edvard Csanyi
Do you know what ground potential rise is? It’s really important.
First of all, ground potential rise is very important and very dangerous event. The grounding engineer will be required to develop safety systems to protect any personnel working where ground… Read more
Feb 22, 2017 | By Edvard Csanyi
5 good examples of locking out HV/MV/LV structures and equipment
In all cases the choice of locks and safety positions requires prior analysis of the locking sequence to be applied in order to correctly define the requirement and clearly identify… Read more
Feb 17, 2017 | By Edvard Csanyi
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… Read more
Feb 15, 2017 | By Edvard Csanyi
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,… Read more
Feb 13, 2017 | By Edvard Csanyi
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… Read more
Feb 08, 2017 | By Edvard Csanyi
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… Read more
Feb 06, 2017 | By Edvard Csanyi
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,… Read more
Feb 03, 2017 | By Edvard Csanyi
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… Read more
Jan 23, 2017 | By Edvard Csanyi