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The storage of fossil fuel like coal is going to be finished in near future. So, we need an alternative source of energy for large scale electric energy generation. This is where nuclear energy comes into picture. Many developed and developing countries have found the tremendous capability of electricity generation of nuclear power. Theory of … Read more
Hydroelectric power is the oldest and cheapest method of large-scale electricity generation. Remarkably, it runs entirely on water. Furthermore, it produces zero direct emissions. Best of all, it costs almost nothing to operate once built. In addition to power generation, most hydro projects also control floods, store irrigation water, and support navigation — all simultaneously. … Read more
Calculate derated current ratings for XLPE EHV cables — 11 kV to 220 kV, 185 to 1200 mm² — per IEC 60287 & IS 3961 with full derating factors. Selecting a high-voltage cable is not simply a matter of choosing a larger conductor size. The cable must carry the required load current continuously without exceeding … Read more
EHV XLPE cable parameter calculator per IS 7098 & IS 8130. Get resistance, impedance, sheath thickness, and short-circuit ratings instantly. Know Your Cable Before You Lay It In electrical engineering, a cable is not just a wire. It is a carefully designed system — every layer, every millimeter, every material has a reason. But calculating … Read more
In the winding resistance measurement test of a power transformer, we simply use either the ammeter-voltmeter method or the Kelvin Double Bridge method. Actually, we inject DC current to the winding of the transformer. Additionally, we measure the voltage drop across it. Then we determine the resistance value of the winding by dividing the voltage … Read more
Test your knowledge with MCQ on Lightning Arresters. Practice important objective questions with answers and explanations for exams and interviews. Video on Lightning Arresters
In this article, we will discuss the electrical faults that normally occur in a power system. A short-circuit fault means the connection between two conductive parts of the system through a low-impedance path, where these two parts are at different voltage levels. Due to the low impedance of the path, as well as the voltage … Read more
The primary objective of a power system protection scheme is to isolate only the faulty section of the network while keeping the healthy portions in service. This approach improves system reliability and ensures continuity of power supply to consumers. Whenever a fault occurs in any part of a power system, it is desirable to disconnect … Read more
Test your knowledge with MCQ on Vacuum Circuit Breaker (VCB). Practice objective questions on VCB operation, construction, arc extinction, applications, and protection systems. Video on Vacuum Arc
An electrical power system often suffers from different abnormal conditions. For examples, it may suffer from short circuit faults. The system may go through the overloading conditions. There may be insulation failures. Lightning surges may strike on the system. We call these abnormal conditions together as electrical faults. Any these faults can damage electrical equipment … Read more