What must be done once commercial power is restored after installing an ATS?

• A. A visual inspection
• B. A full system test
• C. A maintenance schedule
• D. A performance evaluation

Answer: (B)

After installing an Automatic Transfer Switch (ATS) and restoring commercial power, conducting a full system test is crucial. This test ensures that the ATS is functioning as intended and is capable of switching between sources of power without issues. It verifies that all components, including relays, circuit breakers, and controls, are properly working to facilitate the safe transfer of power when needed.

Conducting a full system test after restoration confirms the reliability and readiness of the power system for any future outages. It also helps in identifying and addressing any potential issues that may have arisen during installation or while restoring power, ensuring that the system operates safely and efficiently under load conditions.

While visual inspections, maintenance schedules, and performance evaluations are important steps in the overall management of power systems, these actions typically follow the critical testing phase to ensure immediate operational readiness.