BR excess temperature
ABB · ACS880
¿Qué significa 7183 ?
The brake resistor has overheated beyond its fault limit, indicating it's dissipating too much energy. This can be caused by continuous heavy braking cycles, improper resistor sizing, or inadequate cooling, posing a risk of resistor damage or fire.
Causas comunes
- Excessive or continuous regenerative braking cycles causing the brake resistor to dissipate energy beyond its continuous rating.
- Brake resistor undersized for the application's duty cycle (kW rating too low).
- Inadequate cooling or restricted airflow around the brake resistor enclosure.
- Incorrect thermal overload settings (P4-03) for the brake resistor protection.
- Mechanical issue in the application causing frequent, heavy deceleration.
Pasos de reparación & Lista de verificación
Haga clic en los pasos para seguir su progreso.
- 1
Allow the brake resistor to cool down completely. Monitor its temperature with an infrared thermometer (e.g., 25°C ambient).
- 2
Verify the brake resistor's specified power rating (kW) and duty cycle (ED%) are suitable for the application.
- 3
Inspect the brake resistor's mounting location for sufficient ventilation and clear any obstructions.
- 4
Adjust drive parameter P4-03 (Brake Resistor Thermal Protection) to match the resistor's actual thermal characteristics.
- 5
If using an external thermal switch on the resistor, check its wiring to the drive's digital input and its trip setting.