How can voltage sensors contribute to motor protection?

Voltage sensors play a crucial role in motor protection by providing feedback on supply voltage variations. When motors operate, they require a stable and optimal voltage level for proper performance. Fluctuations in voltage can lead to under-voltage or over-voltage conditions, both of which can cause significant damage to the motor.

Under-voltage may result in insufficient torque, causing the motor to stall or operate inefficiently, while over-voltage can lead to overheating and insulation failure. By continually monitoring the supply voltage, voltage sensors can detect these variations in real time and trigger protective measures, such as alarms or automatic shut-offs, to prevent damage to the motor. This proactive approach ensures that the motor operates within its safe voltage range, thereby enhancing its longevity and reliability.

In contrast, while other options might relate to motor performance or operation, they do not directly impact the electrical aspect of motor protection as voltage sensors do. Monitoring ambient temperature, controlling mechanical alignment, or tracking external load conditions are important, but they serve different purposes in motor operations and maintenance.