What does an 'on-line' motor protection system do?

An 'on-line' motor protection system is designed to monitor motor performance in real-time. This capability allows the system to continuously assess various operating parameters such as temperature, vibration, current, and voltage. By doing so, it can detect anomalies or deviations from normal operating conditions, which is crucial for preventing potential failures or damages to the motor.

Real-time monitoring enables immediate response to issues, thereby enhancing operational efficiency and reliability. This proactive approach is vital in industrial settings, where downtime can be costly. Continuous performance data not only supports instant troubleshooting but also provides insights for long-term maintenance strategies.

The other options, while relevant to different aspects of motor management and efficiency, do not directly describe the core function of an on-line motor protection system, which is centered on real-time performance monitoring.