Power Semiconductor Devices
Power semiconductor devices first appeared in 1952 with the introduction of the power diode. The thyristor appeared in 1957.Thyristors are able to withstand very high reverse breakdown voltage and are…
Isolation Transformers
Electrical isolationis necessary to protect: - Circuits Equipment People from shocks and short circuits To make accurate measurements. Isolation transformersare used to transfer electrical power from a source of alternating…
HVDC Transmission
In an AC system, voltage conversion is simple. An AC transformer allows high power levels and high insulation levels within one unit, and has low losses. It is a relatively…
Gas Turbine Power Station
A generating station which employs gas turbine as the prime mover for the generation of electrical energy is known as a gas turbine power plant In a gas turbine power…
Faults And Abnormal Conditions
A faultin an electric power system can be defined as, any abnormal condition of the system that involves the electrical failure of the equipment, such as, transformers, generators, busbars, etc.…
Digital Frequency Meter
Every signal has a frequency whether it’s ac (50 Hz in India) or DC (0Hz). For appliances working on alternating current, the frequency must 50 Hz, if the frequency falls…
Diesel Power Station
A generating station in which diesel engine is used as the prime mover for the generation of electricalenergy is known as diesel power station. In a diesel power station, diesel…
Current limiting Reactors
The amount of fault current which flows depends on the reactance in the circuit. Reactors are therefore used in addition to limit the short circuit current and protect the system…
Construction Of Powercables
An underground cable essentially consists of one or more conductors covered with suitable insulation and surrounded by a protecting cover. Although, several types of cables are available, the type of…
Types of Errors
Error is defined as the difference between the true value of a certain quantity and the measured quantity. Errors also have different categories: - GROSS ERROR: - These errors are…