A2: An SLD uses a range of standardized symbols to represent different electrical components. While specific symbols can vary slightly by region or standard (e.g., ANSI or IEC), the most common ones include:

• Generators: Often a circle with a "G" or a sine wave inside, representing the power source.

• Transformers: Two interlocking coils or circles, indicating where voltage levels are stepped up or down.

• Circuit Breakers: A square with an "X" or a box with a diagonal line, used to protect circuits from overcurrents.

• Busbars: A thick line representing a junction where multiple circuits connect.

• Disconnect Switches: A switch symbol, used to isolate equipment for maintenance.

• Loads: A circle with an "M" for motors or a rectangle for lighting panels, representing where the power is consumed.