OTM125F4C21D380C_ABB_PRODUCT_吉林易择科技技术发展有限公司

Technical Parameters Specification Typical Value / Description Product Type Motorized Automatic Transfer Switch (ATS) / Change‑Over Switch Model OTM125F4C21D380C Number of Poles 4 poles (three phases + neutral) Rated Operational Current 125 A Rated Operational Voltage 380 V AC three‑phase system Control / Motor Supply Voltage 380 V AC Controller Type C21D logic (automatic transfer logic integrated) Transition Type Open transition (break‑before‑make) Mechanical Interlock Yes — prevents simultaneous connection of both sources Mounting Panel or enclosure installation Typical Applications Utility ↔ backup generator load transfer in industrial and commercial systems Weight (approx.) ~3 kg (typical for compact 125 A units) Size Compact low‑voltage transfer switch format

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DESCRIBE

The ABB OTM125F4C21D380C is a 4‑pole motorized automatic transfer switch (ATS) / change‑over switch designed to automatically transfer electrical loads between two independent AC power sources — such as the utility mains and a standby generator — in three‑phase low‑voltage power distribution systems. This switch features a motorized operator for automatic source switching triggered by internal logic (C21D controller class) and also supports manual override via a handle or external control. A mechanical interlock ensures that the two sources remain electrically isolated and prevents them from being connected at the same time, enhancing safety and protecting equipment.

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