FEATURE DRIVES, CONTROLS & MOTORS
Pump & fan inverter offers high performance and energy savings
Mitsubishi Electric has developed a new generation of drive technology for its latest pump and fan inverter, the FR-F800, which offers improved performance in terms of energy saving, optimised speed control, simple start-up and connectivity
T
he F800 is designed to be used predominantly with pumps and fans,
but is equally suitable for compressors and HVAC applications. It features many innovative functions that ensure accurate control, while also achieving claimed energy efficiency figures of 98 per cent. At the heart of the all new FR-F800 is a bespoke PID controller and on-board PLC which provides the drive with true stand- alone capabilities. For instance, it can control fans, pumps and compressors directly rather than requiring an additional controller. Other PID functions include: a pump-stir function, upper and lower limit pre-warnings, pipe burst detection and dry run protection, water hammer prevention and automatic tuning. To enhance its capabilities, the F800 is fitted with a second PID controller. The drive can be used to control multiple pumps - allowing for variable speed control and the energy efficiency benefits which that brings, to be applied to different units while the others are running effectively Direct On Line (DOL). It can even run pump cleaning cycles automatically, to a schedule, or on
There are initially six units in the F800 series, three covering the 200V- 240V range from 0.75kW- 110kW and three more in the 380V-500V range from 0.75kW-630kW. The F800 has the capability to communicate via CC- Link, Profibus, Ethernet, EtherCat, SSCNETIII, DeviceNet and Lonworks, whilst RS485, Modbus, BacNet etc are fitted as standard
demand which should be of great interest to operators of waste water sites where features such as this have historically had a patchy track record of effectiveness. Instead of relying on single set points for trip activation, an algorithm in the drive can effectively detect the fan or pump torque curve of the attached load and react appropriately when operational limits are approached, which means an end to nuisance trips caused by unusual but not critical load variations. Another feature of the F800 is a motor
preheat function, which aids smooth start-up, dispels condensation, and prevents damage due to freezing in outdoor conditions. Its real-time control capabilities can also detect and reduce vibration due to mechanical resonance, protecting other equipment from excessive wear, mechanical damage and premature failure.
ENERGY OPTIMISATION Improving energy efficiency for an already efficient product is all about making small advancements on many fronts and the Mitsubishi F800 has a wide range of dedicated features and functions that create efficient operation. For example, during standby all
unnecessary circuits are shut down to reduce energy usage. Advanced Optimum Excitation Control (AOEC) maximises energy savings even for high torque loads, while intelligent cooling fans only activate when required because a set point temperature has been reached. The F800 provides plug-and-play auto
tuning for both induction motors and high efficiency permanent magnet motors. For ease of set up, a one touch Digital Dial allows direct access to all important parameters, while connection to graphical operator terminals and HMIs is kept very straightforward. Alternatively an optional six line LCD display includes an easy start-up wizard function. As with all new Mitsubishi Electric products, the F800 has been designed for maximum backwards compatibility with earlier generation drives. The F800 is in full compliance with European EMC Directive standards. It meets safety directives, has marine approvals, Tüf, UL, cUL and CE certification, and is sold with a three year warranty as standard.
Mitsubishi Electric
gb3a.mitsubishielectric.com T: 01707 288780
20 OCTOBER 2015 | AUTOMATION
/AUTOMATION
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