The Manual Open Execution Changeover Switch provides safe, reliable on‑load switching between two power sources using a double‑break knife‑type contact system and a dual dead‑centre mechanism that ensures consistent make/break action regardless of operator speed. Inter‑phase barriers, source separators, and terminal shrouds enhance operator safety, while its high electrical and mechanical endurance and large terminal capacity support aluminium cables and busbars. A staggered terminal layout allows easy wiring and inspection without removing existing connections, and features like universal mounting, padlocking, optional auxiliary contacts, and flexible shaft positions offer excellent adaptability for panel builders and system integrators. This open‑execution design is ideal for industrial and commercial distribution boards requiring customizable panel integration.