400A Automatic Changeover Switch (ATS) is used to automatically transfer electrical power between the utility (PHCN/NEPA) and a standby generator whenever there is a power outage, then switch back when utility power is restored. It prevents both power sources from being connected simultaneously and provides uninterrupted power to critical loads. �
Eaton +1
Typical specifications:
Current rating: 400 A
Voltage: 415 V AC, 3-phase, 50 Hz (common in Nigeria)
Poles: 4-pole (recommended for most installations)
Operation: Fully automatic with manual override
Applications: Factories, commercial buildings, estates, hospitals, hotels, and large residential properties