Skin Effect in Conductors | Causes & Effects

The distribution of current over the entire cross-section of the conductor is uniform in case of a DC system. But there is an unequal distribution of current over the entire cross-section of the conductor in case of AC system. Here what Skin Effect arises. What is Skin Effect (SE)? When an AC Current flows through a conductor, … Read moreSkin Effect in Conductors | Causes & Effects

Proximity Effect In Conductors

What is Proximity Effect? Suppose two or more conductors carrying AC current are placed near each other. Each conductor is producing its varying magnetic field. When this varying magnetic field is linked with other current carrying conductors then the distribution of current in each conductor is affected due to the varying magnetic field. The varying magnetic … Read moreProximity Effect In Conductors

Pumped Storage Plant | Principle of Operation

Pumped Storage Plant These are a special type of power plant which works as ordinary hydropower plants for part of the time and when such plants are not producing power, they can be used as pumping stations which pump water from tail race to the head race. During this time, these plants utilize power available … Read morePumped Storage Plant | Principle of Operation

Difference Between Current & Potential Transformer

The differences between Current Transformer (CT) and Potential Transformer (PT) are given below: S.No. Current Transformer (CT) Potential Transformer (PT) 1. It is connected in series with the power circuit. It is connected in parallel with the power circuit. 2. Its secondary is connected to an Ammeter. Its secondary is connected to a Voltmeter. 3. Its secondary … Read moreDifference Between Current & Potential Transformer

Comparison of Steam & Hydroelectric Power Plant

The comparison of steam power plant with hydroelectric power plant is given in the following table. Points Steam Power plant Hydroelectric Power plant 1. Initial cost per kW in ₹ Initial cost is lower than those of hydroelectric & nuclear power plant (1000 to 1500). Initial cost is very high because of dam construction & excavation … Read moreComparison of Steam & Hydroelectric Power Plant

Comparison between EHVAC and HVDC Systems

EHV AC stands for Extra High Voltage Alternating current and HVDC stands for High Voltage Direct current. As compared to EHV AC, HVDC has following advantages and disadvantages. Advantages 1. HVDC systems are economical for long distance bulk power transmission by overhead line (reduced tower costs). 2. There is greater power per conductor and simpler line … Read moreComparison between EHVAC and HVDC Systems

Fuses | Characteristics, Applications & Types of Fuses

Fuse was patented by Thomas Edison in 1890. Fuse is the simplest & cheapest device used for interrupting an electrical circuit under short circuit or excessive. The fuse element is generally made of materials having low melting point, high conductivity and least deterioration due to oxidation e.g., silver, copper etc. Definition of fuse It is … Read moreFuses | Characteristics, Applications & Types of Fuses

Corona | Effects of Corona | Practical Importance

Corona When an alternating potential difference between the two conductors of a transmission line is raised beyond a certain limit, a point is reached when a pale violet glow appears on the conductor surface, together with a hissing noise. This phenomenon is known as Corona. Actually, air particles around the conductor surface get ionised and … Read moreCorona | Effects of Corona | Practical Importance

Islanding Operation in Electrical Grid

Frequency and Voltage are two important parameters which decide the healthiness of the electrical grid at a particular instant of time. Frequency fluctuations occur in the electrical grid when there is a mismatch between the amount of power generation and amount of power demand. Both under frequency and over frequency operation is harmful to the … Read moreIslanding Operation in Electrical Grid

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