Schneider Electric ATV16U18N4 Variable Frequency Drive

Schneider Electric's ATV16U18N4 Altivar 16 variable speed drive is a compact 0.75 kW (1 HP) three‑phase AC drive designed to control asynchronous motors on 380–500 V AC networks. Housed in an IP31 enclosure, it accepts 50/60 Hz input and delivers a speed‑control range of 0.5–400 Hz with a continuous output current of 2.3 A at 380 V (2.1 A at 500 V), while the line current is 3.9 A at 380 V and 3.5 A at 500 V; apparent power is 5 kVA at 400 V. Its 4 kHz nominal switching frequency can be increased to 12–16 kHz with derating, and it provides Modbus RTU communication over a 2‑wire RS‑485 interface (RJ45). The unit's physical footprint is 200 mm high, 180 mm wide, and 144 mm deep, and it features a single red LED for DC bus energization. The ATV16U18N4 is part of the Altivar 16 family, with documentation in the US literature (the U suffix denotes US documentation). This reference is discontinued, with Schneider listing end‑of‑commercialization on December 31, 1998 and end‑of‑service on December 31, 2003, and catalogs often point to a modern replacement such as ATV320U07N4C for similar 0.75 kW, 380–500 V three‑phase applications.