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

Overhead cables, due to their exposure to external environments, are subject to various influences that can lead to different types of faults. Below are some common types of faults in overhead cables and their causes:1. Mechanical Damage Caused by external forces such as falling trees, vehicle collisions, or construction accidents. Prolonged vibrations or swinging can also cause material fatigue in cables.2. Weather-Related Faults Lightning Strikes: Direct hits or nearby lightning strikes can ca

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

Why are Overhead Power Lines Loose on Utility Poles and Transmission Towers?In today's era of rapid technological advancement, the transportation of people, goods, and services has become significantly easier. Geographical distance is no longer a formidable obstacle. Just as these tangible entities can be efficiently conveyed over long distances, electricity also needs to be transmitted far and wide. However, unlike physical goods, electricity requires a medium for its journey.You may have frequ

Classification of Transmission LinesTransmission lines are facilities used in power systems to transmit electrical energy generated by power plants to substations or end-users. Depending on different criteria, transmission lines can be classified in various ways. Below are the main classifications of transmission lines based on key standards:1. Classification by Voltage LevelTransmission lines are typically categorized by their operating voltage as follows: High Voltage Transmission Lines (HV):

A high-voltage power cable is a type of cable used for transmitting and distributing high-voltage electrical energy, typically in power transmission and distribution networks. The design and manufacturing of high-voltage power cables must meet strict standards to ensure safe and reliable operation under high voltage and high current conditions. Here are the main features of high-voltage power cables:1. Complex Structure Conductor: Usually composed of multiple strands of copper or aluminum wire t

Changing the thickness of wires in a circuit can have a significant impact on the current, which is reflected in several aspects:1. Resistance changeThe thickness of a wire directly affects its resistance. According to Ohm's Law, resistance is directly proportional to the length of the conductor and inversely proportional to its cross-sectional area. Therefore, thinner wires have higher resistance, while thicker wires have lower resistance.2. Power LossDue to the presence of resistance, when cur

The relationship between the tail protection of the cable and the automatic reclosing.The problem of reclosing in cable line protectionIn cable line protection, the application of automatic reclosing has certain limitations. Automatic reclosing is usually used for overhead line transmission and power supply lines as an effective accident prevention measure. However, for cable lines, due to their characteristics, the application of automatic reclosing is not common.The characteristics of cable li

The following types of cables can mainly be used to supply power to consumers through overhead cables:I. Overhead insulated conductorsCharacteristicsOverhead insulated conductors are based on traditional overhead bare conductors and have an insulating layer added. This insulating layer is usually made of materials such as polyethylene or cross-linked polyethylene and has good insulating properties and weather resistance.Compared with overhead bare conductors, overhead insulated conductors can ef

Whether to adjust the wire diameter when the power supply voltage increasesWhen the supply voltage increases, the need to adjust the wire diameter depends on a number of factors, including the original design of the line, the load requirements, and the specific circumstances of the voltage increase. Here's an analysis based on search results:Factors affecting wire diameterLine loss problemToo small power supply line diameter will lead to increased line resistance, increase the loss of electrical

Why low-voltage transmission for household electricityHousehold electricity is usually used low-voltage transmission, rather than high-voltage transmission, mainly for the following reasons: Safety considerations: The voltage of the home electricity is low (usually 220 volts), and this voltage is designed to ensure the safety of the user. While high-voltage transmission can reduce line losses, it also brings higher risks, such as the possibility of electric shock. Low-voltage transmission reduce