The atomic hydrogen arc welding is an arc welding process which uses an arc between two tungsten electrodes in a shielding atmosphere of hydrogen. The atomic hydrogen arc welding was invented by Irving Langmuir.The essentials of the atomic hydrogen arc welding are as follows −The electrical energy is supplied to ... Read More

Various Systems of Power TransmissionFor the transmission of electrical power from the generating stations to the substations for distribution, there are various types of power transmission systems are adopted. However, for the transmission of electric power, three-phase three wire transmission system is universally adopted.The different possible systems for electric power ... Read More

Depreciation of Power Station EquipmentThe reduction in the value of the equipment and other property of the power station every year is known as depreciation. Therefore, a suitable amount, called depreciation charge, must be set aside annually so that by the time the life span of the power plant is ... Read More

Units of EnergyThe capability of an object to do work is called its energy. In electrical engineering, the most important forms of energy are electrical energy, mechanical energy and thermal energy. Different units of measurement are used for the various forms of energy. Although, the units of electrical, mechanical and ... Read More

Advantages of High Transmission VoltageElectric power is transmitted at very high voltages due to some technical and economic reasons which are described as follows −1. Reduces the Volume of Conductor MaterialConsider the electric power being transmitting through the three-phase three-wire transmission system.Let, P = Power transmitted (in Watts)V = Line ... Read More

Power FactorThe cosine of angle between voltage and current in an AC circuit is called the power factor of the circuit. In other words, the power factor is defined as the ratio of active power to the apparent power in the circuit, i.e., $$\mathrm{\mathrm{Power\: factor, }\:\mathrm{cos}\:\phi \:=\:\frac{\mathrm{Active\: power\: (in\: Watts)}}{\mathrm{Apparent\: ... Read More

Connected LoadThe connected load is defined as the sum of continuous ratings of all the equipment connected to the electrical power station.An electric power station supplies the power to thousands of consumers. Each consumer has certain equipment in his premises. The sum of the continuous ratings of all the equipment ... Read More

A power plant converts one form of energy (for example, hydro, thermal, nuclear, etc.) to electrical energy. We can broadly classify the power plants as follows −Thermal Power PlantHydroelectric Power PlantNuclear Power PlantDiesel Power PlantIn addition, there can be other types of power plants such as Solar Power Plant and ... Read More

The electric power can be transmitted either by using AC transmission system or DC transmission system. Each transmission system has its own advantages and disadvantages. Therefore, to choose the right system for electric power transmission, we need to compare the two systems.The following table compares and contrasts the AC transmission ... Read More

Cost of Electrical EnergyThe cost of electrical energy generated can be divided into three parts, viz −Fixed CostSemi-Fixed CostOperating or Running CostFixed Cost of Electrical EnergyThe cost of electrical energy generated which is independent of the units generated and the maximum demand, is known as fixed cost.The fixed cost of ... Read More