What characteristic is NOT considered when specifying a current transformer or voltage transformer?

The characteristic that is not typically considered when specifying a current transformer or voltage transformer is environmental impact. This is because the primary specifications for these transformers focus on their electrical performance and operational characteristics, such as accuracy, voltage class, and burden.

Accuracy refers to how well the transformer can replicate the primary current or voltage in its secondary output, which is crucial for effective measurement and protection in electrical systems. Voltage class indicates the maximum voltage level that the transformer is designed to handle safely, ensuring that it operates efficiently within its intended range. Burden represents the load that the transformer must drive, typically expressed in ohms or VA, and it is essential for determining how the transformer will perform under specific conditions.

While environmental concerns are important in the broader context of electrical equipment, they do not directly affect the technical specifications and performance metrics that are critical when selecting a transformer for specific applications.