In a motor context, which measurement is most directly compared to the rated FLA to determine overload?

In a motor context, which measurement is most directly compared to the rated FLA to determine overload?

• A. Current
• B. Voltage
• C. Power
• D. Resistance

Answer: (A)

In motor protection, overload is about excessive heating in the windings, which rises with current. The nameplate rating called Full Load Amps (FLA) specifies the current the motor should draw at rated voltage and load. To detect overload, you compare the actual current to this FLA. Since heat in the windings is driven primarily by current (and roughly proportional to the square of the current), seeing a current that exceeds the FLA signals an overload condition and can trigger protection. Voltage alone can vary and doesn’t directly reflect heating, and power or resistance aren’t used for the immediate overload indication in the same direct way. Therefore, current is the measurement most directly compared to the rated FLA.

In motor protection, overload is about excessive heating in the windings, which rises with current. The nameplate rating called Full Load Amps (FLA) specifies the current the motor should draw at rated voltage and load. To detect overload, you compare the actual current to this FLA. Since heat in the windings is driven primarily by current (and roughly proportional to the square of the current), seeing a current that exceeds the FLA signals an overload condition and can trigger protection. Voltage alone can vary and doesn’t directly reflect heating, and power or resistance aren’t used for the immediate overload indication in the same direct way. Therefore, current is the measurement most directly compared to the rated FLA.