Speed drive
April 1st 2008 Northern Foods is saving nearly
£2,500 annually on its compressed
air system since installing an ABB
variable speed drive at its Riverside
Bakery in Nottingham.The 45 kW
drive was supplied by Inverter
Drives Systems (IDS), an ABB Drives
Alliance member.
IDS recommended the use of a
45 kW ABB standard drive.There
are three compressors, two 30kW
fixed-speed assist compressors and
a 45 kW duty compressor.The drive
was fitted on this compressor,
which is in operation all the time.
One of the fixed speed 30kW
compressors is used to top up the
pressure when demand increases,
while the other is on standby in
case one of the others goes down.
"We had to ensure that the fixedspeed
assist compressor only came
online when the duty compressor
with variable speed drive could
provide no more air," says Zac Dorn
of IDS.This was achieved by
installing a pressure sensor. More articles from ABB Limited: | 
