What parallel redundancy does to the power distribution system?
Redundancy is a useful method of increasing reliability and optimising the balance between operation effectiveness and expenditure. In the context of reliability, redundancy signifies that a system will continue to… Read more
Aug 07, 2015 | By Edvard Csanyi
13 Basic expressions often used in electrical testing
This is the simple list of basic terms you can often hear when testing and measurements of electrical installation (in general) is being performed. While experienced electrical engineers will find… Read more
Jul 27, 2015 | By Edvard Csanyi
Two Circuit-Breaker Types For Automatic Disconnection Of the Supply
The Standard IEC 60364 prescribes automatic disconnection of the supply for protection against indirect contact. The protective device shall automatically disconnect the supply so that, in the event of a… Read more
Jul 20, 2015 | By Edvard Csanyi
Comparision of Direct-on-line (DOL) and Star-delta Motor Starting
Direct-on-line (DOL) starting Advantages Drawbacks Star-delta starting Advantages Drawbacks Comparision of DOL and Star-delta starting As the name suggests, direct-on-line starting means that the motor is started by connecting it… Read more
Jul 17, 2015 | By Edvard Csanyi
Differences in size and weight of equipment using copper and aluminium conductors
It is a common misconception that electrical equipment built using aluminum conductors will always be larger than the same equipment using copper conductors. While the actual conductor within the equipment… Read more
Jul 13, 2015 | By Edvard Csanyi
MV Metal-Enclosed Switchgear and Loss of Service Continuity (LSC) Categories
Some parts of a switchgear may be made accessible for the user, for various reasons from operation to maintenance, and such an access could impair the overall operation of the… Read more
Jul 10, 2015 | By Edvard Csanyi
4 Main Means For The Generation Of Reactive Power
The four main means for the generation of reactive power are: synchronous alternators, synchronous compensators (SC), static var compensators (SVC) and banks of static capacitors. Contents Synchronous alternators Synchronous compensators… Read more
Jun 29, 2015 | By Edvard Csanyi
Take into account these losses when purchasing power transformer
Losses and purchase price should be considered when deciding which transformer to purchase. The purpose of this technical article is to present a uniform approach that can be used to determine the dollar… Read more
Jun 26, 2015 | By Edvard Csanyi
Example for Coordination of Cascaded Circuit Breakers
A 440 V 60 Hz switchboard feeds a 4-wire distribution board for small loads such as socket outlets. The switchboard has a fault making capacity of 100kA rms. After applying… Read more
Jun 24, 2015 | By Edvard Csanyi
Calculation of motor starting time as first approximation
The problems connected to motor starting operations are fundamentally linked to the type of motor which a determined motor operational torque “CM” offers, to the starting modality and to the… Read more
Jun 22, 2015 | By Edvard Csanyi
5 copper busbar jointing methods you should know
Efficient joints in copper busbar conductors can be made very simply by: Bolting Clamping Riveting Soldering Welding Bolting and clamping are used extensively on-site. Shaped busbars may be prefabricated by… Read more
Jun 17, 2015 | By Edvard Csanyi
When To Use a Solidly Grounded System?
As is evident from the name, a solidly grounded system is one where the neutral of the system is directly connected to ground without introducing any intentional resistance in the… Read more
Jun 10, 2015 | By Edvard Csanyi
How to achieve selective coordination of circuit breakers
Selective coordination is often referred to simply as coordination. Coordination is defined in NEC® 240.2 as: “The proper localization of a fault condition to restrict outages to the equipment affected,… Read more
Jun 08, 2015 | By Edvard Csanyi
What Is The Poor Power Quality?
Most electrical and electronic equipment is designed to operate from a power supply with a particular specification that usually defines the minimum and maximum limits for RMS (root mean-square) voltage… Read more
Jun 05, 2015 | By Edvard Csanyi
Understanding Transfer Switch Transition Types
Transfer switches are used for quickly and safely transitioning all electrical power consumed by the circuit, equipment, or systems connected to the transfer switch output between those normal and emergency power… Read more
Jun 03, 2015 | By Edvard Csanyi