When the circuit breaker lamp is on, which indication confirms the fault status?

When the circuit breaker lamp is illuminated, it indicates that there is a fault condition present within the system. The confirmation of this fault status is demonstrated by the fault lamps being off. This situation can occur when the circuit breaker is tripped or malfunctioning, leading to a failure in the regular flow of electrical power. In a functional system, the fault lamps would typically indicate if there are any issues present; therefore, their being off is a clear signal that the circuit is not operating correctly, corroborating the fault indicated by the circuit breaker lamp.

If the fault lamps were on, it would indicate a highlighted problem or fault in the system rather than confirming that a fault condition exists. Power flowing or frequency stability would not directly confirm a fault status either. Similarly, an increase in temperature may be a consequence of the fault but does not serve as a direct indicator of the fault status itself. Hence, the indication of the fault lamps being off effectively confirms that there is an issue needing further investigation or corrective action.