What indicates that the input power has an incorrect phase sequence at the Sensor Power Distribution Panel?

The correct answer is that a phase detector indicates that the input power has an incorrect phase sequence at the Sensor Power Distribution Panel. The phase detector is specifically designed to monitor and assess the sequence of the power phases. When there is an incorrect phase sequence, it activates an alert, commonly manifested by a red indicator light, signaling that the electrical supply is not in the proper order.

This feature is essential for ensuring that the systems powered by the distribution panel operate correctly; power systems often rely on the proper sequence of phases for stable performance. Proper phase sequencing is critical in electrical systems, as incorrect sequencing can lead to equipment malfunctions or damage.

The other options, while related to power management, do not specifically address the indication of an incorrect phase sequence. For instance, a phase sequence indicator, if functioning correctly, would provide information about the sequence but isn’t the direct alert mechanism like a phase detector. Similarly, a power status light typically indicates the overall operational status or failure of the power supply but not the specific phase sequence accuracy, while a voltage checker measures voltage levels rather than phase sequence. These tools serve valuable functions but do not directly identify phase sequence issues as accurately as a phase detector does.