It is reported that over £25,000 of
energy costs per year are being saved
by an asphalt production plant
following the fitting of ABB variable
speed drives.

The asphalt production process
creates steam and dust, which is
extracted by an exhaust fan. To
control the fan, a 110kW ABB
standard drive has been fitted.

Other ABB variable speed drives
have been fitted on the bitumen
pump, the rotating dryer, the hot
stone elevator, the mixer and the
batch elevator, as well as other energy
saving components such as timers.

There has also been a 5dB
reduction in noise in the asphalt
drying area.