What the line is
The ABB ACS800-31-0025-3 is an AC inverter drive in the ACS800-31 series, classed under Motor Drives within the Drives and Motors & Motor Controls path. Mass comes in at 29.48 kgs on the spec sheet, which is a one-person-with-a-lift-aid job during unpacking and a cabinet-mount decision before craning the unit into place — it does not change the electrical fit, but it does drive the panel layout and the way the drive is braced inside the enclosure.
Where the class is used
ACS800-31 platform drives of this frame size are used for speed control of low-voltage three-phase AC motors in standard industrial lines such as pumps, fans, conveyors, and extruders.
Sourcing posture
For a panel already running other ACS800-31 frames, matching nameplate data against the purchase order, recording firmware version at receipt, and keeping the standard ABB declaration pack on file keeps documentation clean at commissioning sign-off.