178B1434 by Danfoss

The 178B1434 is an AC variable-frequency drive manufactured by Danfoss within the VLT 2800 Low Voltage Drives series. It is intended to regulate asynchronous motor speed in factory automation and utility equipment, giving electronic control of torque, acceleration, and energy use instead of relying on mechanical throttling. By converting fixed mains power to a programmable output, the drive supports continuous or cyclic duty profiles common in material-handling conveyors, centrifugal pumps, and fan arrays used in process environments. This type of control helps maintain stable operation when loads change during normal machine or plant use.

This model accepts a mains window of 380-480 V ±10% 50/60 Hz and is wired for three-phase supply networks, matching common industrial distribution standards. Its nominal output is rated at 0.75 kW, which corresponds to 1.0 HP, so it suits small motors used on auxiliary axes or branch lines. The enclosure is protected to IP20, allowing finger-safe installation inside panels while ventilation openings remain exposed to room air. The drive uses a standard hardware configuration and comes without an application option, coating, or fieldbus card, which suits basic frequency control where network communication is handled elsewhere in the system. Its output class is appropriate for compact motor installations where accurate speed adjustment is more important than high power demand.

A slim Bookstyle housing lets multiple drives mount side by side in crowded cabinets, and conducted emissions are limited by the integrated EN 55011 A1 (IT-mains) RFI filter, reducing interference on ungrounded supply networks. Parameter editing and status feedback are handled through the Built In Display (SLCP), so a separate keypad is not required for local access. The unit is intended for Process applications and uses conventional terminal control, which fits installations that need straightforward speed regulation on pumps, fans, and conveyor sections. The narrow enclosure and onboard filter also help simplify cabinet layout when several drives are installed in the same row.