Automation & Control

Fig. 1. By controlling up to four pumps simultaneously, the new system enables constant pressure to be maintained in pipelines regardless of fluctuations in outflow demand.

 The latest drive technologies are overcoming traditional drawbacks by being easy to install and much more energy efficient.

 Die neuesten

Antriebsverfahren machen mit den herkömmlichen Nachteilen Schluss, denn sie sind einfach zu installieren und erheblich energieeffizienter.

 Les nouvelles technologies d’entraînement surmontent les inconvénients traditionnels par leur facilité d’utilisation et leur efficacité énergétique bien supérieure.

Drive technologies focus on cost-effectiveness and ease of use

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EG, the global supplier of motors, drives, controls, transformers, and generators, has introduced its CFW-08 Multi-pump AC drive, a new

system that saves energy in pumping systems, by allowing the control of up to four pumps from one variable frequency drive (VFD). “There are multiple advantages to installing

a Multi-pump variable frequency drive system,” said Graham Johnson, senior drives engineer at WEG UK. “These include energy saving, extended operating system life, system default diagnosis, constant line pressure and pump operation time equalisation.”

By controlling up to four pumps simultaneously, the WEG CFW-08 Multi-pump system enables constant pressure to be maintained in pipelines regardless of fluctuations in outflow demand (Fig. 1). This is achieved using a PID controller in conjunction with the auxiliary pumps’ start/stop logic. In addition, the CFW-08 also monitors the pressure and level of the capture reservoir, and provides minimum output pressure fault monitoring for broken pipes or cavitation, and maximum output pressure fault monitoring for blocked or obstructed pipes. The CFW-08 operates in two control modes, V/F

and Sensorless Vector. The V/F mode is suited to variable torque loads and includes a selectable energy saving feature, which reduces motor losses when Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52