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Archive: Category «Energy and Power»

Energy and Power

Using AC switchgear in DC applications

Switchgear designed for alternating current can carry at least the same rated continuous operational DC current. With direct current the skin effect in the circuits disappears and none of the… Read more

Apr 19, 2013 | By Edvard Csanyi

Using AC switchgear in DC applications
Energy and Power

Grounding systems and their 3-letter classification

Low voltage systems supplying to consumer premises are predominantly solidly grounded. Protective ground connection to consumer premises (or extending the supply system ground to consumer premises) is however done in different… Read more

Apr 12, 2013 | By Edvard Csanyi

Grounding systems and their 3-letter classification
Energy and Power

Detecting Cyber Intrusion in SCADA System

One of the axioms of cyber security is that although it is extremely important to try to prevent intrusions into one’s systems and databases, it is essential that intrusions be… Read more

Apr 06, 2013 | By Edvard Csanyi

Detecting Cyber Intrusion in SCADA System
Energy and Power

Preparing to synchronize a generator to the grid

In order to synchronize a generator to the grid, four conditions must be met: Phase Sequence Voltage Magnitude Frequency Phase Angle The phase sequence (or phase rotation) of the three… Read more

Mar 27, 2013 | By Edvard Csanyi

Preparing to synchronize a generator to the grid
Energy and Power

Lightning Protection System – Germany Regulations

The purpose of a lightning protection system is to protect buildings from direct lightning strikes and possible fire, or from the consequences of the load-independent active lightning current (non-igniting flash… Read more

Mar 22, 2013 | By Edvard Csanyi

Lightning Protection System - Germany Regulations
Electrical Lectures

The Rheostat In Few Simple Words

A variable resistor can be made from a wirewound element, rather than a solid strip of material. This is called a rheostat. A rheostat can have either a rotary control… Read more

Mar 20, 2013 | By Edvard Csanyi

Startup rheostat of VL10 3 kV DC electric locomotive
Energy and Power

Sources and Contributors To Short Circuit Current

Every electrical system confines electric current flow to selected paths by surrounding the conductors with insulators of various types. Short circuit current is the flow of electrical energy that results… Read more

Mar 15, 2013 | By Edvard Csanyi

Sources and Contributors To Short Circuit Current
Energy and Power

Working principle of thermal motor protection relay

Thermal motor protection relays contain three bimetal strips together with a trip mechanism in a housing made of insulating material. The bimetal strips are heated by the motor current, causing… Read more

Mar 09, 2013 | By Edvard Csanyi

Working principle of thermal motor protection relay
Energy and Power

An Overview Of Short Circuit Current (part 3)

Fault calculations are carried out to find the magnitude of fault current at various voltage levels of electrical system. One of the key components in the calculation process is to determine… Read more

Mar 08, 2013 | By Asif Eqbal

An Overview Of Short Circuit Current (part 3)
Electronics

Super Capacitors – Different Than Others (part 2)

Continued from first part: Super Capacitors – Different Then Others (part 1) Equivalent circuit How to measure the capacitance? Charge Method Discharge Method Measure Capacitance Capacitor types Advantages of the… Read more

Mar 01, 2013 | By sravankumarpadala

Super Capacitors - Different Then Others (part 2)
Energy and Power

An Overview Of Short Circuit Current (part 2)

Continued from previous technical article: An Overview Of Short Circuit Current (part 1) Sub transient reactance Xd” is the apparent reactance of the stator winding at the instant short circuit… Read more

Feb 27, 2013 | By Asif Eqbal

An Overview Of Short Circuit Current - Part 2


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