Brass is commonly used in power transformer metal parts due to its excellent properties, such as good electrical conductivity, resistance to corrosion, and durability. Some of the key uses of brass in power transformers include:

1. Connectors and Terminals: Brass is often used for electrical connectors, terminal blocks, and bus bars in transformers. These parts need to conduct electricity efficiently and maintain a secure connection, making brass a preferred material due to its good conductivity and strength.

2. Bushings: Brass bushings are used in transformers to isolate electrical components and allow conductors to pass through insulating materials. They help prevent short circuits and protect the electrical system.

3. Switchgear Components: Brass is also used in the manufacture of switchgear components such as switches, circuit breakers, and fuses. These parts require a material that can handle high currents without degrading over time, and brass's ability to resist oxidation makes it ideal.

4. Transformer Frames and Casings: While steel is typically used for the frame, brass may be used for certain casings or parts that require higher resistance to corrosion or need to withstand specific environmental conditions.

5. Pressure Relief Valves: Brass is used for valves in transformers, particularly those that release pressure in case of internal faults. The corrosion resistance of brass ensures these valves perform reliably over time.

6. Grounding Components: Brass is used in grounding systems of transformers due to its durability and ability to resist wear and corrosion, ensuring long-lasting performance in grounding applications.