178B2742 by Danfoss

The 178B2742 is a low-voltage AC drive produced by Danfoss and placed in the VLT 2800 Low Voltage Drives series. In process automation, this drive regulates induction motor speed by adjusting output frequency and voltage, allowing pumps, conveyors, and mixers to match real-time load requirements while reducing energy use and mechanical stress. By varying motor speed instead of running equipment at a fixed rate, it helps smooth starts and supports more consistent process control. This makes the unit suitable for machines that need adjustable speed during normal production.

For electrical compatibility, the drive accepts a mains supply of 380-480 V ±10% 50/60 Hz on a three-phase line, a range common to industrial switchgear. This input range allows the unit to operate on common plant power systems without a separate input transformer in many installations. Its motor output is rated at 2.0 HP, which corresponds to a mechanical power capability of 1.5 kW. The drive uses a standard hardware configuration, so no specialized I/O boards are preinstalled. A built-in radio-frequency-interference filter meets the EN 55011 Class A1 emission limit, so additional external filters are usually unnecessary in typical factory environments. The housing carries an IP20 protection rating; live parts are guarded against accidental finger contact, but the unit must be mounted inside a control cabinet where dust and moisture are controlled.

The slim, vertical Bookstyle enclosure reduces panel width and allows side-by-side mounting when heat-sink clearance is observed. The narrow housing format is useful in multi-drive panels where several units are installed in one vertical column and lateral space is limited. Because it is supplied without coating, the printed circuit assemblies are intended for clean, controlled cabinets rather than high-humidity zones. It is intended for general process duties where standard V/f or sensorless vector control is sufficient.