Electric Motor
PLC Ladder Diagrams for Electrical Engineers (Beginners)
As an introduction to ladder diagrams, consider the simple wiring diagram for an electrical circuit in Figure 1a. The diagram shows the circuit for switching on or off an electric… Read more
Nov 30, 2015 | By Edvard
Protection
HV/MV/LV Transformer Protection Schemes
Transformer protection should take into account the power, voltage, vector group and the importance of the unit within a particular system. Depending on these factors, the transformers can be assigned… Read more
Nov 28, 2015 | By Edvard
Electric Motor
Comparison of 4 Different Flow Control Methods Of Pumps
When in use, the pumps are always part of a pumping system. A pumping system is usually a network of pipes, tanks, valves and other system parts. The receiver is… Read more
Nov 27, 2015 | By Edvard
Electrical Lectures
The Mesh Current Method For Analysis Of Electric Circuits
The mesh current method of circuit analysis discussed in this technical article employs mesh currents as the independent variables. The idea is to write the appropriate number of independent equations,… Read more
Nov 25, 2015 | By Edvard
Electric Motor
Guidelines to electrical braking of asynchronous motors
In many industrial systems, motors are stopped simply by natural deceleration. The time this takes depends solely on the inertia and resistive torque of the machine the motor drives. However,… Read more
Nov 23, 2015 | By Edvard
Energy and Power
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 | By Edvard
Energy and Power
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 | By Edvard
Energy and Power
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 | By Edvard
Energy and Power
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 | By Edvard
Energy and Power
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 | By Edvard
Energy and Power
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 | By Edvard
Energy and Power
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 | By Edvard
Energy and Power
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 | By Edvard
Energy and Power
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 | By Edvard
Energy and Power
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 | By Edvard
