Booster transformers are used to increase the voltage magnitude of an electrical system. They are typically used in transmission systems to regulate the voltage level and compensate for voltage drops in long transmission lines.

The main purpose of a booster transformer is to step up the voltage level to meet the load requirements at the receiving end of the transmission line. This is achieved by increasing the voltage magnitude of the alternating current (AC) signal.

Here are some key points to understand about booster transformers:

1. Voltage Regulation: Booster transformers are used to regulate the voltage level in a transmission system. They help to maintain a consistent level of voltage at the receiving end of the transmission line, even when there are fluctuations in the voltage level due to changes in load or other factors.

2. Voltage Step-Up: Booster transformers step up the voltage level of an AC signal. This is done by increasing the number of turns in the secondary winding of the transformer. The voltage level is increased in proportion to the ratio of the number of turns in the secondary winding to the number of turns in the primary winding.

3. Application: Booster transformers are typically used in high-voltage transmission systems. They are often used in conjunction with other types of transformers, such as step-down transformers and distribution transformers.

In summary, booster transformers are an important component of transmission systems, helping to regulate the voltage level and compensate for voltage drops in long transmission lines. They are used to increase the voltage magnitude of an electrical system, improving the efficiency and reliability of the system.