178B2005 by Danfoss

The 178B2005 is an adjustable-speed drive manufactured by Danfoss as part of the VLT 6000 HVAC Drives series. Designed for air-handling and pumping equipment, it converts fixed mains power into variable voltage and frequency output so induction motors can track changing thermal demand in large buildings. By placing motor speed control in the electrical cabinet, the drive helps reduce energy use and mechanical wear in fans, pumps, and compressors used in centralized climate-control systems. This type of control also allows smoother acceleration and better matching of motor speed to changing building demand.

The electrical input range of 380-460 VAC allows direct connection to common industrial power networks. Its motor output is rated at 7.5 kW, which corresponds to 10 HP and suits medium supply or return fans. The narrow bookstyle IP20 enclosure supports side-by-side panel mounting while protecting against finger contact. Conducted emissions are limited by an integrated Class A1 and B filter, which helps reduce electromagnetic interference on surrounding equipment. The unit comes without a local control panel, so operating parameters must be set with a remote keypad or PC software. The boards have no coating, so the drive is best installed in a clean, dry electrical room.

The drive is intended for fan and pump control in ventilation and hydronic systems used in large buildings. It is supplied as a standard unit, which means harmonic chokes, brake modules, and other custom assemblies are not included with this ordering code. The order also includes no fieldbus options, so network communication would require a separate plug-in card. Basic integration can still be handled through isolated I/O connections. This arrangement suits installations that rely on hardwired control and monitoring signals.