Product category:
Industrial Drives/Controls
News Release from: Lenze | Subject: Model 8218 inverters
Edited by the Engineeringtalk Editorial
Team on 31 May 2000
Inverters cut costs in water pumping
Lenze frequency inverters connected to pumps in a mains water system have achieved considerable running-cost savings while dramatically lowering maintenance costs at the same time
In Aerzen, a small town in Germany, two Lenze manufactured frequency inverters connected to pumps in the mains water system have achieved considerable running-cost savings while dramatically lowering maintenance costs at the same time The model 8218 inverters drive ac motors rated at 11kW which are coupled to pumps delivering up to 45m3/hr
This article was originally published on Engineeringtalk on 21 Feb 2000 at 8.00am (UK)
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Depending on demand, one or both pumps are run creating a water pressure of 7 bar in order that it be pumped up into a water tower.
When demand is low, the primary pump can be reduced in speed.
With just a 20% fall in demand, a saving of some 45% in running costs is possible.
The new inverter drives are modern alternatives to star delta starting which introduced shocks and pressure surges into the pipeline resulting in frequent damage.
The 8218 Lenze inverters boast a 10-second ramp-up time which gradually increase water pressure without any shocks or pressure surges.
Their introduction immediately resulted in a drastic reduction in maintenance costs.
Moreover, peak current demands on starting are also dramatically reduced.
The Lenze inverters therefore save energy in terms of start-up and running currents, plus they protect the water mains pipework.
Lenze Limited market the entire range of Lenze products in the UK. Request a free brochure from Lenze ...
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