178B5519 by Danfoss

The 178B5519 is a low-voltage AC drive manufactured by Danfoss for the VLT 2800 Low Voltage Drives series. It is intended for process-oriented machinery that requires variable motor speed instead of fixed mains operation, helping pumps, fans, and conveyor lines match output to changing demand. By adjusting output frequency, the unit supports steady torque response, smoother process control, and reduced energy use while fitting into space-restricted control cabinets. In applications with varying flow or throughput, that control helps motors run closer to the actual load instead of operating continuously at full speed.

This model accepts a single- or three-phase input of 200-240 V AC, matching supply ranges commonly found in light industrial plants. The slim Bookstyle layout allows side-by-side installation with minimal clearance in narrow panels. Operators use a built-in display (SLCP) to view parameter numbers and live values directly at the drive, which simplifies routine checks at the cabinet door. Internally, the unit has a Standard hardware configuration, so no optional I/O boards or expanded memory are preinstalled. The enclosure carries an IP20 rating, and all printed circuit boards have a protective coating to help resist humidity and airborne contamination inside enclosed panels.

The drive is supplied with no application option selected, so setup is performed through the general-purpose parameter set rather than preloaded process macros. It also comes without a fieldbus option, leaving the integrated terminal strip to handle start/stop commands and analog speed references. The absence of added communication hardware keeps the basic control scheme centered on local wiring and standard analog signals. For electromagnetic compatibility, the unit is provided without an RFI filter, so an external line filter may be needed where conducted emissions must meet plant requirements. This arrangement keeps the control interface straightforward and leaves filtering choices to the cabinet design.