High temperatures in transformers limit their __________ carrying capacity.

High temperatures in transformers are primarily associated with their current carrying capacity. As the temperature rises, the resistance in the wires within the transformer also increases, which can lead to higher losses in the form of heat. This phenomenon is related to the fact that conductors have properties that degrade at elevated temperatures, including an increase in resistance that limits the amount of current they can safely carry without overheating further.

Additionally, excessive current flowing through a transformer can lead to insulation breakdown, reduced efficiency, and ultimately potential failure of the transformer. Thus, managing temperatures is critical for maintaining a transformer’s current capacity to ensure it operates safely and efficiently.

In contrast, while voltage, power, and energy are related concepts, they are not directly limited by high temperatures in the same way that current is. Voltage may be influenced indirectly by temperature fluctuations due to changes in resistance, but the most direct impact from high temperatures concerns the current capacity of the transformer. Power, which is the product of voltage and current, can be affected by current limits, but it does not directly limit the transformer's overall performance when working at higher temperatures.