178B8579 by Danfoss

The 178B8579 is an AC variable-frequency drive produced by Danfoss within the VLT 2800 Low Voltage Drives series. It is intended for panel-mounted motor control, where it adjusts output frequency and voltage to match the speed demand of the connected machine. In pumps, fans, and similar process equipment, that control helps the motor draw only the torque required by the load. This can reduce unnecessary mechanical stress during normal operation in automated lines. It supports everyday industrial duty in ventilation, fluid handling, and general machinery.

This model accepts an AC supply of 380-480 V AC 50/60 Hz on a 3-phase network, giving it compatibility with common industrial power systems. Its inverter section provides a continuous output of 1.1 kW, which corresponds to 1.5 HP for small to mid-sized induction motors. The enclosure carries an IP20 protection rating, so the drive should be installed inside a cabinet where dust or liquid exposure may occur. No RFI filter is installed, and the unit is supplied without an application option or fieldbus option. As a result, speed references and run commands are handled through hard-wired control terminals, and any required EMC or communication accessories must be added separately.

The tall, narrow book-style housing helps save panel width, and the built-in display provides local access to operating values such as speed, current, and fault codes. The drive is supplied in a standard configuration with a brake, so a preinstalled braking transistor helps manage DC-bus energy during rapid deceleration of high-inertia loads. Its electronic boards have a coating finish that helps protect against moisture and airborne contaminants in demanding indoor installations. This arrangement keeps status information visible at the unit and preserves a straightforward control layout. Because no EMC filter or fieldbus card is included, the base unit stays focused on core motor control functions while leaving external option selection open.