MCCB-type Automatic Transfer Switch (ATS) panels using two interlocked moulded case circuit breakers (MCCBs) for automatic transfer between mains and generator at 415V AC, 50Hz. The MCCB-type provides both switching and short-circuit protection in a single device — if a downstream fault occurs, the MCCB trips and isolates the fault without affecting the other source. Each panel includes two 4-pole MCCBs (with adjustable thermal-magnetic or electronic trip units), a mechanical and electrical interlock preventing simultaneous closure, a digital ATS controller with voltage, frequency, and phase monitoring, and mode selector (Auto–Manual–Off). Standard protection includes over-voltage, under-voltage, phase loss, phase sequence, and frequency monitoring. Available from 100A to 1600A. Supplied in IP55 powder-coated steel enclosures with indication lamps, alarm contacts, and generator interface terminals. Suitable for commercial buildings, data centers, banking branches, and industrial plants where integrated fault protection is required at the transfer point.