How many fuses are required for the transformer bank described?

In a transformer bank configuration, the number of fuses required generally corresponds with the number of transformers or phases being protected. A typical three-phase transformer bank setup consists of three separate transformers, each dedicated to one phase of the electrical system. Each of these transformers needs its own fuse to protect against overcurrent situations, thereby ensuring optimal safety and effective operation.

In addition to the basic three-phase fuses, some transformer banks may require additional fuses for protection of neutral conductors or for specific configurations where higher levels of safety are implemented. Therefore, in this context, the correct number of fuses for the described transformer bank would be three for the three phases, plus one additional fuse for neutral protection.

To summarize, having a total of four fuses provides the necessary protection for the complete transformer bank, addressing both the individual phase transformers and any additional components that need safeguarding. This leads to the conclusion that four fuses are required for the transformer bank setup mentioned, underlining the importance of adequate protective measures in electrical systems.