The Schneider VW3AE0502 is an enclosure heater designed for Altivar floor-standing cabinets with separate air flows or compact versions. It fits the Altivar 61 Plus, 61 Plus-LH, 71 Plus, and 71 Plus-LH series. This accessory prevents condensation inside the cabinet by maintaining a stable internal temperature above the dew point.
What it does in the cabinet
Mounts inside the Altivar floor-standing enclosure. Its job is to keep the internal air temperature above the condensation point, protecting drive electronics and bus bars from moisture damage. In a cold plant or a cabinet that cycles between hot running and cold idle, a failed heater can cause tracking faults on the power board. The VW3AE0502 is the factory-specified part for that role — no adapter plate or wiring harness modification needed.