In an ATS, which component houses the microprocessor that controls all ATS functions?

In an ATS, which component houses the microprocessor that controls all ATS functions?

• A. Mechanical Timer
• B. Analog Relay
• C. Digital Control Board
• D. Power Transformer

Answer: (C)

The main idea being tested is where the ATS’s control logic and decision making reside. The brain of an ATS—the microprocessor that runs the software, monitors input conditions (voltage, frequency, phase), makes the transfer decision, sequences the switching, and handles alarms and communication—is housed in the digital control board. This board integrates sensing, processing, and actuation into one unit, so it’s where all ATS functions are controlled from. A mechanical timer provides only preset timing actions and cannot perform real-time monitoring or software-driven decisions. An analog relay is merely a switch that responds to a control signal; it has no processing capability. A power transformer changes voltage levels but does not perform control or logic.

The main idea being tested is where the ATS’s control logic and decision making reside. The brain of an ATS—the microprocessor that runs the software, monitors input conditions (voltage, frequency, phase), makes the transfer decision, sequences the switching, and handles alarms and communication—is housed in the digital control board. This board integrates sensing, processing, and actuation into one unit, so it’s where all ATS functions are controlled from.

A mechanical timer provides only preset timing actions and cannot perform real-time monitoring or software-driven decisions. An analog relay is merely a switch that responds to a control signal; it has no processing capability. A power transformer changes voltage levels but does not perform control or logic.