TOMZN 4P+4P MTS AC Dual Power Circuit Breaker MCB 50HZ/60HZ Change Over
The TOMZN 4P+4P AC Dual Power Manual Transfer Switch with Integrated MCB is a manual changeover device with built‑in circuit breaker protection designed for three‑phase AC dual power systems. It lets you manually switch between two independent power sources (such as the main grid and a backup generator) to maintain continuous and reliable power supply during outages or faults. The device supports 230 V–400 V AC at 50/60 Hz and features protective functions such as overload, under‑voltage, short‑circuit, and phase‑loss protection, making it suitable for critical applications where power interruptions are not acceptable, including factories, commercial installations, high‑rise buildings, hospitals, and emergency systems. Its dual 4‑pole design ensures complete switching of all three phase lines and neutral for safe and balanced power transfer.












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