Learn Electrical Engineering
Measuring soil resistivity is essential before designing a grounded earthing system for a substation. Because this measurement determines how well the ground can dissipate fault currents. If the soil resistivity is high, the grounding system needs some changes. It requires denser earthing mesh and more conductive electrodes. A well-designed earthing system prevents intolerable voltage buildup. … Read more
The electricity demand is increasing day by day. On the other hand, the land available for constructing new transmission lines is reducing continuously. Due to growing legal complexities, identifying or surveying a suitable transmission corridor has become a significant challenge. Therefore, the only practical solution available is to transmit more power through the existing transmission … Read more
What is Insulation Resistance? Insulation resistance measures how well an insulating material stops leakage current. We measure this blocking ability in Ohms (Ω). Furthermore, good insulation has very high resistance. In contrast, poor insulation allows current to leak. Obviously, this leakage can cause electric shocks, equipment damage, and fire hazards. Basic Formula of Insulation Resistance … Read more
TACSR stands for “Thermal Resistant Aluminium Alloy Conductor Steel Reinforced”. It is a type of HTLS conductor. TACSR can carry higher current than conventional ACSR conductors. This is because its operating temperature is much higher than that of ACSR. However, it maintains similar mechanical practices with higher ampacity. Power utilities use TACSR mainly for uprating … Read more
The electricity demand increasing tremendously from last few decades. The increasing demand of lands and few government policies are the constraints in expanding transmission infrastructure. Hence there is no way other than increasing the ampacity of the existing transmission networks. This increases the need for High-Temperature Low-Sag (HTLS) conductors. Among the various HTLS conductors, INVAR … Read more
An attraction type moving iron instrument works based on the principle of attraction of a magnetic material towards the coil. Basic Structure Suppose there is a coil. We connect this coil with an electric source. Whenever we inject current into the coil, the coil will become a magnet. Obviously, this magnet attracts any iron pieces … Read more
A resistor is one of the fundamental components in circuits. It limits current flow or divides voltages in the circuit. Although all types of resistors serve the same basic function, different manufacturing methods and materials create distinctions among them. Each type has its unique characteristics suited for specific applications. Differnt Types of Resistors as Follows … Read more
A wire wound resistor consists of a winding of resistive wire wrapped around a non-conductive cylinder. This is the oldest type of resistor. Although we use wire wound resistors these days. Because these resistors provide high accuracy, better stability. Also, they can handle much more power than other types of resistors available for fixed resistor … Read more
A metal film resistor is a passive resistor. It uses a thin film of metal alloy deposited around a ceramic cylinder to provide the current path of the resistor. The ceramic cylinder provides mechanical strength to the resistor. The tolerance of the metal film resistor is quite lower than that of the carbon composition resistor … Read more
A carbon film resistor is first made by depositing a thin layer of carbon onto a ceramic (usually alumina) cylindrical substrate through a process called pyrolysis or vacuum deposition. Then, during construction, the carbon film is carefully trimmed or spiraled to achieve the desired resistance value. After that, metal end caps and lead wires are … Read more