178B5035 by Danfoss

The 178B5035 is a variable frequency AC drive produced by Danfoss and belongs to the VLT 2800 Low Voltage Drives series. The unit modulates the voltage and frequency delivered to a three-phase induction motor, allowing precise speed and torque control in continuous-duty process lines, conveyors, and other automated equipment. Its operating principle lets the connected motor follow changing process demand more closely than fixed-speed operation, which supports smoother control in systems that do not run at one constant output level.

The drive is rated for 25 HP, which corresponds to 18.5 kW under nominal conditions. It accepts an input supply of 380-480 V ±10% 50/60 Hz, allowing operation across common industrial mains variations without requiring a tightly fixed incoming voltage. Designed for three-phase power systems, the converter rectifies incoming AC, stores energy in its DC link, and then reconstructs a variable-frequency output so motor speed follows commanded setpoints or closed-loop references. This arrangement supports controlled acceleration, steady running, and speed adjustment through the drive rather than through mechanical changes in the driven equipment.

The narrow Bookstyle housing supports dense panel layouts while maintaining an IP20 enclosure that helps protect against accidental contact with live parts inside a cabinet. A built-in display (SLCP) on the front cover provides access to setpoints and fault codes without requiring an external interface for basic interaction. The electronics are supplied with a protective coating to improve resistance to airborne contaminants often found in industrial areas. Because the drive comes without a filter, it does not include an internal RFI stage, so external EMC components may be needed where installation rules require them. The unit is intended for process-oriented use and focuses on core drive control rather than added application functions.