Automatic transfer system explained in details (operational requirements)
In previous article I explained the role of the automatic transfer system and the operational requirements – three modes of operation: manual mode, automatic mode and auto mode failure. Now… Read more
Nov 21, 2015 | Edvard
Automatic Transfer System (ATS) Explained in Details
Using the basic building blocks of utility power, system topology, on-site generation, and uninterruptible power supplies, the basic role of the automatic transfer system may now be defined. In this… Read more
Nov 20, 2015 | Edvard
Example On How To Design a Low Voltage Switchboard
This technical article has the aim of helping the panel builder and the designer in the construction of ABB SACE ArTu low voltage switchboard. To this purpose, starting from the… Read more
Nov 18, 2015 | Edvard
Primary distribution schemes of power plants on board of big ships
The MV primary distribution network generally consists in a three-phase system with three conductors without neutral. Such system is usually managed with the neutral of the star point isolated from… Read more
Nov 16, 2015 | Edvard
The Tesla Electric Light Company in Electrical Review, August 14, 1886
Electrical Review, August 14, 1886 – A weekly journal of electric light, telephone telegraph and scientific progress This company has been organized nearly two years, and has devoted that tittle,… Read more
Nov 14, 2015 | Edvard
Single-line diagram of the AC transmission and distribution system
The conductor system by means of which electric power is conveyed from a generating station to the consumer’s premises may, in general, be divided into two distinct parts i.e. transmission… Read more
Nov 13, 2015 | Edvard
Connection Schemes For Testing Insulation Resistance Of Electrical Equipment
The following schemes show how to connect a Megger insulation tester to various types of electrical equipment. The schemes also show in principle how equipment must be disconnected from other circuits before… Read more
Nov 11, 2015 | Edvard
LV/MV Distribution In Power Plants On Board Of Big Ships
Without going into the details of the management modalities of the electric distribution or of the layout that an electrical system on board may have, it is possible to describe… Read more
Nov 09, 2015 | Edvard
Stop Transformer Noise With These Rules and Techniques
There are a number of basic installation precautions and transformer mounting techniques which if carefully noted and followed, will minimize the audible sound level (noise) of energized transformers. Some of… Read more
Nov 07, 2015 | Edvard
Electrical installations where use of TN-C-S system is prohibited
A real danger can arise when the non-current-carrying metalwork of an installation is connected to the system’s neutral, as is the case with a TN-C-S-fed system. The ground system is… Read more
Nov 06, 2015 | Edvard
The Node Voltage Method For Analysis Of Electric Circuits
Node voltage analysis is the most general method for the analysis of electric circuits. In this technical article, its application to linear resistive circuits is illustrated. The node voltage method… Read more
Nov 02, 2015 | Edvard
6 steps to establish electrically safe work condition
Equipment that has been deenergized and verified as such is said to be in an electrically safe work condition. Article 120.1 of NFPA 70E outlines six steps that must be… Read more
Oct 31, 2015 | Edvard
Protection of A.C. Electrified Railways
Many regional, urban and high-speed inter-urban rail networks worldwide are electrified, to provide the motive power for trains (Figure 1). The electrification system serves as the contact interface for current… Read more
Oct 30, 2015 | Edvard
Troubleshooting An Open Circuit Faults in the Control Circuit
– The machine does not start when the start button is pressed. At this point the problem could be mechanical or electrical. We will focus on just the electrical circuit… Read more
Oct 26, 2015 | Edvard
Balancing of single-phase loads to achieve energy efficiency
All single-phase loads, especially those with non-linear characteristics, in an electrical installation with a three-phase supply should be evenly and reasonably distributed among the phases. Such provisions are required to… Read more
Oct 24, 2015 | Edvard
