Which secondary transformer connection is used to supply the correct voltage for a 240-volt load?

The correct answer for supplying the correct voltage for a 240-volt load is based on the transformer connection principles. For a 240-volt load, a connection that provides the necessary secondary voltage through phase arrangements is required.

The typical configurations for transformers, known as primary and secondary connections, are designed to step down higher voltages to levels that can effectively power typical residential or commercial loads. In this case, Connection I is often a center-tap or a delta configuration that enables a voltage division to achieve exactly 240 volts.

A transformer connection that yields a secondary voltage of 240 volts typically involves one of these arrangements where either two phases are used or where a center tap can provide the desired output voltage by utilizing the difference between the phase voltages effectively. This allows the load to operate safely and efficiently under its rated voltage.

Connections that do not meet this configuration either provide a lower or higher voltage than required, making them unsuitable for a 240-volt load. Understanding these configurations is important for ensuring proper voltage supply to electrical devices, maintaining operational efficiency, and ensuring safety in electrical installations.