FR-F800 VSD for pumps requiring more safety, security and more up-time

False alarms and service visits due to the unnecessary shut-down of pumps and fans are unacceptable as industry strives for greater productivity through operational efficiency and plant availability. The on-board intelligence in Mitsubishi Electric’s FR-F800 inverter drive virtually eliminates nuisance tripping.

The FR-F800 is designed to provide higher reliability and fewer alarms in tough pumping applications. Unlike drives relying on single set-points for trip activation, the auto-tuning in the FR-F800 monitors the torque curve of the attached fan or pump and produces an output signal when set points are approached. This means an end to nuisance trips caused by unusual, but not critical load variations.

Far fewer false alarms means more uptime, fewer maintenance call outs and faster responses to genuine issues such as jammed pumps, broken impellers, snapped belts, etc.  At the other end of the scale in the event of an emergency, the F800’s fire override mode will keep extraction fans and water pumps running to the point of the drive’s destruction.

Safety standards compliance

A two-channel emergency stop provides a safe shutdown which can prevent damage to the drive of the F800 inverter can be used to prevent the inverter from supplying rotational energy to motors. Dual input terminals can be used to cut off the gate-drive power to the IGBT. PLd and SIL2 are supported as standard. (STO), and the F800 complies with EN ISO 13849-1 PLd / Cat.3 and EN 61508, EN61800-5-2 SIL2.

To enhance the reliability of the F800, fault finding is aided by a built-in data logging and tracing function. Intelligent predictive maintenance is achieved through the monitoring of critical components such as power capacitors and cooling fans. Maintenance timers are available for up to three peripheral devices, such as a motor and bearings.

Easy fault diagnosis

The operating status (output frequency, etc.) immediately before the protection function activates can be stored in the inverter’s built-in RAM to provide a trace function. Stored trace data can be copied to a USB memory device, to allow analysis at a separate location by reading into FR Configurator2 software. Trace data stored in the built-in RAM is deleted when the power is turned OFF or the inverter is reset.

Prevention of trouble with temperature monitoring

The inverter is equipped with an internal temperature sensor, which outputs a signal when the internal temperature is high. This facilitates the detection of rises in temperature inside the inverter following cooling fan malfunction, or rises in the surrounding air temperature due to inverter operating conditions.

Long life components

The service life of the cooling fans is now ten years. This can be further extended by ON/OFF control of the cooling fans from within the drive, and the drive’s set-point controlled internal cooling fans can also be synchronised with the enclosure cooling fan. Likewise, the design life on the main circuit smoothing capacitors, and printed circuit board smoothing capacitor has also been increased to ten years. The standard manufacturer’s warranty has been extended to three years.

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