Frequently Asked Questions from TANO CABLE

AC stands for an alternating current, which refers to an electric current whose direction changes periodically over time, and the average current in one cycle is zero. Unlike direct current, its direction changes over time ,while direct current does not change periodically. The power generation is typically AC-most generators are based on an alternator which creates an alternating current as the wire stator turns within a magnetic field. AC power transmission is also preferred for high voltage transmission because it is relatively easy to step down the voltages for various applications with transformers.

DC stands for direct current, which refers to an electric current that does not change in magnitude or direction over a certain period of time. DC is a constant current that flows in one direction only and does not alternate. For example, the current provides by dry cell batteries is DC. DC is used in a wide variety of applications, including testing equipment in research units and laboratories, battery charging, automotive applications, manufacturing testing, and solar panels. It is worth mentioning here that the power generated by photovoltaic panels is typical DC, which requires the use of a power inverter to convert it for standard power applications.

 

Feature	Feeder	Transmission Line
Purpose	Distribute power locally	Transmit power over long distances
Voltage Level	Low to medium	High to very high
Length	Shorter	Longer
Location	Urban and rural	Less populated areas

A transmission line is used to carry electricity over long distances. It connects power plants to substations and sometimes substations to substations. Key points about transmission lines include:

• Purpose: Transmit electricity over long distances.
• Voltage Level: High to very high voltage.
• Length: Much longer than feeders.
• Location: Often found in less populated areas.

Types of transmission lines
Transmission lines are also classified based on voltage levels and construction types. Here are the main types:

Type	Description
Overhead Transmission Line	Uses towers and conductors. Most common type.
Underground Transmission Line	Buried under the ground. Used in urban areas.
High Voltage Direct Current (HVDC)	Uses direct current. Efficient for very long distances.

A feeder is a power line that carries electricity from a substation to the distribution transformers. These transformers are usually located near the end-users, such as homes and businesses. Here are some key points about feeders: • Voltage Level: Typically low to medium voltage.
• Length: Usually shorter than transmission lines.
• Location: Found in both urban and rural areas.

Types of Feeders

Feeders come in different types based on their configuration and voltage levels. Here are the main types: 

Type	Description
Radial Feeder	Has a single path for electricity. Simple but less reliable.
Ring Main Feeder	Forms a loop. Offers more reliability.
Parallel Feeder	Uses multiple paths. High reliability and load-sharing.

The package is usually wooden drum or steel wooden drum or coil.