Intelligent inverter reduces false alarms and pump and fan shutdowns

23 November 2015

The new FR-F800 inverter drive from Mitsubishi Electric is said to offer an intelligent solution to reducing pump and fan shutdowns.

False alarms and unnecessary service trips due to shut down of pumps and fans are increasingly unacceptable as industry strives for greater operational efficiency and plant availability. 

The FR-F800’s on-board intelligence is said to virtually eliminate nuisance trips, making set-up easy and helping achieve energy efficiencies of 98%. 

The inverter is designed to provide higher reliability and fewer alarms in tough pumping applications than was previously possible. Instead of relying on single set-points for trip activation, auto tuning in the FR-F800 can effectively detect the torque curve of the attached fan or pump and react appropriately when operational limits are approached, says the company.

At the heart of the all inverter is a bespoke PID (proportional, integral, differential) controller and on-board PLC which gives the device stand-alone capabilities, including a pump-stir function, upper and lower limit pre-warnings, pipe burst detection and dry run protection, water hammer prevention and automatic tuning to reduce vibration from a system. To enhance its capabilities, the F800 is also fitted with a second PID controller so that it can control multiple fans, pumps and compressors directly, without requiring an additional controller.

The F800 can even run pump cleaning cycles automatically, to a schedule or on demand. This capability should be of particular interest at wastewater sites, where historically it has been difficult to achieve. In the event of an emergency, the inverters fire override mode will also keep extraction fans and water pumps running to destruction when needed.

The F800 has the capability to communicate via CC-Link, CC-Link IE, Profibus DP/V1, Profinet, DeviceNet, EtherNet IP, EtherCat, CanOpen, LonWorks, RS485, Modbus, BacNet etc. as standard. A wide range of I/O connections is complemented by options for input and output reactors, DC link chokes, harmonic filters, regeneration units and braking modules.

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