Energy and Power
Learn To Interpret Single Line Diagram (SLD)
We usually depict the electrical distribution system by a graphic representation called a single line diagram (SLD). A single line can show all or part of a system. It is… Read more
Dec 19, 2015 | By Edvard
Energy and Power
The good ventilation of switchgear and transformer rooms
In order to design a good ventilation of switchgear and transformer rooms, the air in the room must meet various requirements. The most important is not to exceed the permissible… Read more
Dec 18, 2015 | By Edvard
Energy and Power
Distribution of the MV neutral conductor right to the loads
4-wire systems are characterized by distribution of the MV neutral conductor right to the loads. This type of distribution is used in the USA and in certain countries influenced by… Read more
Dec 16, 2015 | By Edvard
Energy and Power
The basics of primary medium voltage switchgear
Primary medium voltage switchgear represents an important part within the primary distribution substation functionality. The switchgear works as a connection node between the outgoing distribution feeders and the in-feeding power… Read more
Dec 14, 2015 | By Edvard
Energy and Power
Real time reactive compensation – A case with 5 problems and solutions
A car equipment manufacturer’s plant in Concord (Ontario, Canada) is supplied by a transformer rated at 2000 kVA – 27.6 kV / 600 V – Yy – Ucc = 5.23 %. It… Read more
Dec 11, 2015 | By Edvard
Electric Motor
The Design Basics Of Motor Protection Circuit Breaker
Application-specific variations of the MCCB, these breakers combine the short-circuit and isolation functionality of the MCCB with the motor overcurrent protection of a traditional overload relay. MPCBs are UL 489 Listed… Read more
Dec 07, 2015 | By Edvard
Energy and Power
Learn How To Specify Current Transformers
Current transformers are used to supply information to the protective relays and/or current, power and energy metering “instruments”. For this purpose they must supply a secondary current proportional to the… Read more
Dec 05, 2015 | By Edvard
Energy and Power
7 guidelines to select correctly rated circuit breaker
The general procedure for the selection of correctly rated circuit breaker follows the following scheme of seven major questions you should answer. Let’s see the major questions: What is the… Read more
Dec 04, 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
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
