What is the primary function of a transformer in a 3-phase system?

The primary function of a transformer in a 3-phase system is to step up or step down voltage levels. This is essential for efficient power transmission and distribution. By raising the voltage for long-distance transmission, transformers help minimize energy loss in the form of heat within the transmission lines. Conversely, at the distribution level, they reduce the voltage to a safer level suitable for household and industrial use.

Transformers work based on the principle of electromagnetic induction, allowing them to change voltage levels while keeping the frequency of the AC current constant. This functionality is crucial for ensuring that electricity is transmitted over vast distances effectively, and it also allows for compatibility with different voltage requirements in various applications and devices. Thus, transformers play a vital role in the management and quality of electrical power in a 3-phase system.