The Schneider VW3A7715 is a braking resistor from the Altivar drive accessory range, rated at 1.05 Ohm with an average power dissipation of 56 kW at 50 °C ambient. It connects via M10 bar terminals to the drive DC bus and includes thermal protection through an integrated overload relay.
Physical Dimensions and Mounting
The resistor measures 1140 mm wide by 1150 mm high by 620 mm deep. These dimensions govern the enclosure cut-out and clearance for airflow — the resistor dissipates 56 kW as heat, so the mounting surface must allow free convection or forced ventilation per the drive installation manual. The M10 bar connection is sized for the drive DC bus cable lugs; verify the lug ring diameter against the bar hole before terminating.
Thermal and Environmental Limits
The 56 kW rating is valid at 50 °C — derating applies above that. The thermal overload relay provides protection against sustained over-temperature; it must be wired into the drive control circuit to initiate a stop on trip.