Which side of a transformer is represented by the symbol 'H'?

The symbol 'H' on a transformer represents the primary side of the transformer. This designation is important because it indicates where the input voltage is applied. In a transformer setup, the primary side receives electrical energy from the power source, while the secondary side, denoted by a different symbol (often 'X' or simply not marked with 'H'), is where the transformed output voltage is taken.

Understanding the function of the primary side is crucial for anyone working with transformers, as it helps in the proper installation and troubleshooting of transformer-related electrical systems. The primary side typically has a higher voltage compared to the secondary side, which is what allows the transformer to change voltage levels.

In practical applications, recognizing the primary side (H side) is essential for ensuring correct connections are made, including the appropriate handling of electrical loads and understanding the transformer's specifications for efficient operation.