Allen-Bradley TCS3P125-22M Automatic Transfer Switch

The TCS3P125-22M Automatic Transfer Switch from Kutai Electronics / MTS Power Products is a 3‑pole, 125 A ATS that automatically transfers three‑phase loads between utility power and a generator during outages or abnormal voltage conditions. It is rated for 220 VAC three‑phase operation (180–270 VAC range) with a maximum switch voltage of 250 VAC and supports 50/60 Hz, and it can operate automatically or manually with electrically operated, mechanically held contacts (double throw with neutral position) controlled by the TC‑V2 digital controller. Key features include over/under voltage protection, adjustable transfer delays from 0 to 99 seconds, a generator exercise timer of 1–4 weeks (with or without load), and a rated short‑time current of 3 kA for 1 second at 250 VAC with a 7.5 kA peak; Utilization Category AC‑33A and more than 6,000 operations under load. Physical specs include panel‑mount, 167 × 118 × 83 mm, 1.39 kg (3.07 lb); UL94V‑0 flame‑retardant plastic construction; operating temperature −20°C to +60°C and up to 95% relative humidity; typical applications include generator backup systems, telecommunications sites, commercial buildings, and industrial facilities requiring automatic source switching for reliable three‑phase power.