Product Description:

The FC-051P18KT4E20H3BXCXXXSXXX/PL3 is a compact AC variable frequency drive produced by Danfoss for the VLT FC 51 Micro Drives series. Designed for small automation panels, it provides adjustable speed control for induction motors used in conveyors, packaging stations, pumps, and similar machinery. The drive varies its output frequency and voltage in response to control commands, allowing motor speed to follow changing process requirements. This regulation can reduce unnecessary energy consumption and limit mechanical stress caused by abrupt starting and stopping.

The drive has a rated output power of 18.5 kW, which is equivalent to 25 HP and supports medium-sized industrial motors. Its input section accepts 380–480 VAC from a three-phase supply, allowing direct connection to common industrial power systems within that voltage range. The IP20 chassis enclosure protects against accidental contact with hazardous internal parts but requires installation inside a suitable cabinet. Adequate cabinet ventilation and clearance around the drive are necessary to prevent heat from accumulating during continuous operation. A factory-installed RFI Class A1/B filter reduces conducted electrical interference that could otherwise affect nearby equipment. External circuit protection and a suitable disconnect must be installed because the unit does not include an integrated mains option.

A brake chopper controls regenerative energy produced during rapid motor deceleration by directing that energy to a compatible braking resistor. This function supports shorter stopping times, but it is separate from safety-rated stop functions and does not replace the required machine safety circuit. The power board uses a coated printed circuit board to protect conductive paths against moisture and airborne contaminants found in typical factory environments. The housing provides standard cable entries for routing mains, motor, and control conductors into the cabinet installation. The drive is supplied without a local control panel, so operation and parameter access require the appropriate external controls or communication method. Parameter values are retained in the drive’s internal memory for use during normal operation and after a power cycle.