Final answer:
The question discusses features associated with transformers in electric power systems. Transformers are essential for adjusting voltage levels and include winding voltage ratings, dual ratings, tap changers, and testing procedures to ensure safe operation.
Step-by-step explanation:
The student's question pertains to the common features and aspects of transformers used in electric power systems. Transformers are crucial for changing voltage levels in power transmission and distribution, and several features ensure their effective operation and integration into electrical systems. These features include:
- Winding voltage ratings which are the voltages that the transformers are designed to handle on their primary and secondary windings.
- Dual rated transformers that are capable of operating at more than one voltage or power rating.
- Tap changers which allow for the adjustment of the transformer's output voltage by changing the number of turns in the active winding.
- Common transformer testing methods that are used to ensure the reliability and safety of transformers before they are put into service or after repair.
The examples provided, such as the step-up transformer increasing voltage from 110 V to 2000 V, the use of transformers in electrical safety systems, and the step-down transformer for household appliances, illustrate the importance and applications of transformers in our day-to-day lives.