What is the temperature threshold for the BATT OVTEMP warning?

What is the temperature threshold for the BATT OVTEMP warning?

• A. Above 70°C
• B. Below -70°C
• C. Above 90°C
• D. At 25°C

Answer: (A)

The idea behind this warning is to protect the battery from overheating. A sensor inside the battery feeds the system, and when the temperature rises above a safe limit, the BATT OVTEMP warning is activated to alert the crew. In the ERJ-145, that limit is 70°C, so crossing that threshold indicates the battery is getting too hot and action is needed to prevent damage or a potential fire. The other options don’t fit because temperatures well below freezing or at normal ambient levels aren’t overheating, and 90°C would be a more severe condition or trigger a different annunciation rather than the standard overtemp warning.

The idea behind this warning is to protect the battery from overheating. A sensor inside the battery feeds the system, and when the temperature rises above a safe limit, the BATT OVTEMP warning is activated to alert the crew. In the ERJ-145, that limit is 70°C, so crossing that threshold indicates the battery is getting too hot and action is needed to prevent damage or a potential fire. The other options don’t fit because temperatures well below freezing or at normal ambient levels aren’t overheating, and 90°C would be a more severe condition or trigger a different annunciation rather than the standard overtemp warning.