This is a KATKO CGER 363 Change-Over Switch (likely from the TKM or CGER series based on its compact, enclosed design). It is a heavy-duty electrical switch used to manually transfer a power load between two different sources—typically between Main Utility Power and a Backup Generator.
Key Specifications
Based on the markings on the side of the unit in your image:
Current Rating: 63A (Amps). This indicates the maximum continuous current the switch can safely handle.
Voltage Rating: 415V (suitable for three-phase systems).
Configuration: I - O - II (Change-over).
I (ON): Power from Source 1 (e.g., Grid).
O (OFF): Isolated/Disconnected position.
II (ON): Power from Source 2 (e.g., Generator).
Enclosure Rating: IP66, meaning it is dust-tight and protected against powerful water jets, making it suitable for indoor or outdoor use.