What are some common uses for indicator lamps?

Indicator lamps serve multiple functions in various applications, and recognizing their uses is essential for understanding their role in electric motor control systems. One key use of indicator lamps is to monitor machine status, providing visual feedback on whether a machine is operating correctly or if there's an issue that requires attention. This immediate visual indication can help operators quickly assess the state of the machinery and take appropriate actions.

Additionally, indicator lamps are employed to indicate power supply. They show whether power is present or if a device is on, which is crucial for safety and operational efficiency. Lastly, these lamps can also act as emergency signals, alerting personnel to issues that need immediate response, such as faults or malfunctions. Since indicator lamps encompass all these roles, the choice that includes all applications accurately reflects their comprehensive nature in various operational settings.