Why Transformer Is Rated In KVA?
We know that Transformer rating may be expressed in kVA as well as Generator and Alternator rated in kVA. There are two type of losses in a transformer; 1. Copper Losses 2.…
Relays
What is a Relay? Relays are widely used for protection of system which makes the system aware whether it has abnormal condition or a fault. If the system is under…
Tariff And Its Types
A certain amount of money rate is charged to the consumer for consumption of electrical energy. This money rate is known as Tariff orthe tariffis the rate at which the…
Switchgear
Need Of Switchgear: A great demand for electrical energy is a notable feature of modern civilization. Most of this energy is needed for lighting, heating, domestic appliances, industrial electrical machinery…
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…