User-friendly, compact variable speed drives for low-power motors
30 January 2016
WEG has introduced an easy-to-use series of compact variable speed drives (VSDs) for low motor powers from 180W to 4kW.
The CFW300 series features an integrated micro PLC and a user-friendly control panel with LCD display. Installation is also easy and quick thanks to plug-and-play extension modules, for which there are two slots: one for communication and the other for a wide variety of I/O modules. This enables users to integrate RS485 or RS232 interfaces and use Modbus RTU, Bluetooth or USB communication protocols.
The VSD can be connected to fieldbus systems such as Profibus DP, CANopen or DeviceNet, or configured for operation under remote control. An Ethernet IP interface is also available. Accessories include a plug-in EMC filter, which can be connected to the VSD quickly without tools or wiring and mounted on the top-hat rail.
Designed to operate at ambient temperatures up to 50°C without derating, the CFW300 is equipped with independently acting, integrated thermal protection functions for motor (electronic motor circuit breaker) and drive. In addition, the drive has conformally coated circuit boards (IEC 60721-3-3, category 3C2), for enhanced corrosion resistance.
The CFW300 will initially be available in frame size A for rated power from 180W to 1.5kW and frame size B for rated power from 2.2 to 4kW. It will provide supply voltage flexibility with versions for single-phase and three-phase power. The single-phase version can also be powered directly from a dc supply connected to the dc link, in order to drive three-phase induction motors from a dc power source.
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