Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

A transmission line serves the crucial function of conveying electrical power from generating substations to diverse distribution units. It effectively transmits voltage and current waves from one end to the other. Structurally, a transmission line consists of a conductor that maintains a consistent cross - section throughout its length. Meanwhile, air functions as the insulating or dielectric medium situated between the conductors, playing a vital role in preventing electrical leakage and ensur

For safety purpose, the ground clearance of the conductors at maximum temperature and minimum loading condition should be maintained. Analysis of the sag and tension is important in the transmission line for the continuity and quality of electrical services. If the tension of the conductor is increased beyond the limit, it may get broken, and the power transmission of the system get erupt.The dip of the conductor between the two level supports is called sag. In other words, the vertical distance

What is Stranded Wire?A stranded wire consists of multiple thin strands of conductors bundled together, often with each pair of strands twisted and insulated. These wires come in various sizes tailored to specific applications.In the UK, common wire sizes are denoted in formats such as 3/0.029″, 7/0.036″, and 7/0.042″. Here, the first digit (e.g., 3 or 7) indicates the number of individual stranded conductors, while the second part (e.g., 0.029″, 0.042&

The Rationale Behind High-Voltage, Low-Current Power TransmissionFor long-distance power transmission, sending electrical power at high voltage and low current stands as the most efficient and cost-effective strategy. This approach significantly mitigates resistive losses, reduces the reliance on costly conductors, and enhances the overall performance of the electrical grid. In this article, we will delve into the key reasons why high-voltage transmission is favored over low-voltage or high-curr

DefinitionAn oil - filled cable is defined as a cable where low - viscosity oil is maintained under pressure, either within the cable sheath itself or in a containing pipe. Under all conditions of varying loads, the oil in the cable fills the voids in the oil - impregnated paper. Historically, mineral oils were commonly used, but more recently, alkylates such as linear decyl benzene and branched nonyl benzene have gained popularity. This is due to their low viscosity and their ability to absorb

DefinitionLine supports refer to various structures, such as poles or towers, that are employed to uphold overhead power lines or wires. These structures play a crucial role in power transmission. They ensure appropriate spacing between conductors and maintain a prescribed distance between the conductors and grounded components. Additionally, they uphold the specified ground clearance, which is determined by electrical and mechanical considerations.Types of Line SupportsThe key requisites for li

DefinitionAn electrical insulating material is defined as a substance that restricts the flow of electricity through it. In such materials, electric charges do not move freely; instead, they offer a highly resistive pathway, making it extremely difficult for electric current to pass. One of the primary applications of electrical insulating materials is in overhead transmission lines, where they are placed between the towers and conductors. Their role here is to prevent the leakage of electric cu

High - Voltage Direct Current (HVDC) System ConfigurationsHigh - Voltage Direct Current, commonly abbreviated as HVDC, is a highly efficient method for long - distance power transmission, significantly reducing power losses compared to traditional alternating - current (AC) transmission. The HVDC system can be implemented in various configurations, each tailored to specific operational requirements. This article provides a concise overview of the main types of HVDC system configurations.Back - t

Carrier Current Protection Scheme for Transmission LinesThe carrier current protection scheme is predominantly employed for safeguarding long - distance transmission lines. Unlike conventional protection methods that focus on comparing actual current values, this scheme operates by comparing the phase angles of the currents at the two ends of the line. Based on the phase - angle relationship, it can accurately determine whether a fault is occurring within the protected line section (internal fau

Electrical Transmission Networks and Overhead LinesIn electrical power systems, Extra High Voltage (EHV, where the voltage V&ge;150kVand High Voltage (HV, with60 kV &le; V <150 kV) are commonly employed for energy transmission. The use of these high - voltage levels serves to reduce the current flowing through the transmission lines. According to Joule's law, W=RI2t=UIt, whereWrepresents the energy dissipated as heat,Ris the resistance of the conductor,Iis the current,tis the time, an