Final answer:
The transformer's nameplate does not typically include overcurrent protection. A step-down transformer has a higher primary voltage and a lower primary current. Transformers function according to Faraday's law of electromagnetic induction.
Step-by-step explanation:
The information on a transformer's nameplate typically includes technical specifications such as the temperature class, rated kilovolt-amperes (kVA), and the primary and secondary voltage levels. However, the nameplate does not usually provide details about overcurrent protection. Overcurrent protection is often specified by an engineer or electrician during the installation process based on the application requirements and local electrical codes.
As for the characteristics of a step-down transformer, they include:
- Primary voltage is higher than secondary voltage.
- Primary current is lower than secondary current.
Transformers operate on the principle of electromagnetic induction as per Faraday's law. An iron core between two coils, the primary and secondary, facilitates the transfer of magnetic flux, which induces a voltage across the secondary coil that is proportional to the ratio of turns between the two coils. This ratio determines if the transformer is a step-up (increases voltage and decreases current) or step-down (decreases voltage and increases current) type.