How Low-Voltage Air Circuit Breaker Works?
A low-voltage circuit breaker is one which is suited for circuits rated at 600 volts or lower. One of the most commonly used low-voltage air circuit breakers is the molded… Read more
Oct 23, 2011 | By Edvard Csanyi
Aluminium or copper busbar trunking? Myth busted!
Following years of copper being the material of choice for high power busbar trunking in the UK, yet aluminium reigning supreme in the rest of the world, Schneider Electric takes… Read more
Oct 19, 2011 | By Edvard Csanyi
Types Of Electrical Power Distribution Systems You Should Know About
Electrical power is distribution either three wires or four wires (3 wire for phases and 1 wire for Neutral). Voltage between phase to phase called Line Voltage and voltage between… Read more
Sep 19, 2011 | By jiguparmar
Fuses – Principles of design and operation
A fuse consists of a replaceable part (the fuselink) and a fuse holder. Examples of fuse holders are shown in Fig. 1. The simplest fuselink is a length of wire…. Read more
Jul 09, 2011 | By Edvard Csanyi
Designing Raw DC Power Supplies
Every type of electrical or electronic apparatus needs a source of electrical energy to function. The source of electrical energy is called the power supply. The two main classifications of… Read more
Jul 03, 2011 | By Sa'ad Eddin
Setting circuit breaker tripping with MS Excel spreadsheet
The protective unit of circuit breaker MUST fulfill: Instantaneous trip setting Im < Iscmin for a circuit-breaker Fusion current Ia < Iscmin for a fuse The protective unit (or device)… Read more
Jul 02, 2011 | By Edvard Csanyi
How residual current device (RCD) works?
The residual current device (rcd) is used to detect earth fault currents and to interrupt supply if an earth current flows. The main application is to prevent electrocution but RCDs… Read more
Jun 11, 2011 | By Edvard Csanyi
How contactor controls an electric motor?
When a relay is used to switch a large amount of electrical power through its contacts, it is designated by a special name: contactor. Contactors typically have multiple contacts, and… Read more
Jun 01, 2011 | By Edvard Csanyi
Switchboard Construction Basics For Engineers
Power distribution systems are used in every residential, commercial, and industrial building to safely control the distribution of electrical power throughout the facility. Most of us are familiar with the… Read more
Apr 09, 2011 | By Edvard Csanyi
Surge protection of cells and inverter – DC side
Providing power with photovoltaic solar panels is tremendously interesting in the context of renewable energy sources, as regards economical LV photovoltaic systems connected to the public electricity network. Because of… Read more
Mar 17, 2011 | By Edvard Csanyi
How circuit breaker trip unit works?
In addition to providing a means to open and close its contacts manually, a circuit breaker must automatically open its contacts when an overcurrent condition is sensed. The trip unit… Read more
Mar 10, 2011 | By Edvard Csanyi
Form of separation 2 – Requirements
Form 2 defines overall assemblies which are enclosed to provide protection against contact with any internal live parts or components, and where there is internal separation of the busbars from… Read more
Feb 04, 2011 | By Edvard Csanyi
The Switchboard Design Requirements
The following rules of design have to be implement in the aim to facilitate the assembly and especially the maintenance of the installation. The switchboard must be designed the way… Read more
Feb 01, 2011 | By Edvard Csanyi
Form of separation 1 – Requirements
In general, the price of an Assembly will increase with increased levels of separation and/or types of construction. Choosing the arrangement with the most internal barriers will not always lead… Read more
Jan 27, 2011 | By Edvard Csanyi
Maintenance Of Molded Case Circuit Breakers (MCCB)
The maintenance of circuit breakers deserves special consideration because of their importance for routine switching and for protection of other equipment. Electric transmission system breakups and equipment destruction can occur… Read more
Jan 01, 2011 | By Edvard Csanyi