Nord: Energy-efficient pump drive solutions

Running permanently at full speed may work for you but not so much for your pump drives. Speed control balanced to actual requirements greatly enhances the energy efficiency of pump systems.

Nord DriveSystems supplies complete pre-assembled distributed drive units for a wide performance range up to 22 kW. In addition to energy savings of up to 60%, users benefit from reduced noise emissions, low wear, and increased plant service life as well as the ecological advantages.

Nord DriveSystems’ integrated pump drives can store up to four operation modes which can be displayed and changed directly at the control unit. The SK 200E series comprises reliable and economical frequency inverters, especially tailored to pump applications that require precise adjustments of power output; these are compatible with mains voltages worldwide.

For improved customer ease, Nord configures complete drive systems for various application areas (IP55/IP66, ATEX zone22/3D), and its integrated process and PI controller functions enables the fully-automated control of process variables as well as compensation of disturbances. This is applicable both in stand-alone and mobile applications as well as in complex setups with several drives.

Martin Broglia, managing director of Nord DriveSystems Australia says that thanks to two analogue inputs, the inverters can directly process sensor data such as pressure or flow rate. “Optional signal and power plug connectors facilitate handling and ensure compatibility. A programmable energy-saving function automatically reacts to partial load operation – increasing efficiency and significantly reducing running costs.”

Operation is straightforward and flexible via control terminals, bus, or via an optional potentiometer that enables adjustments directly at the inverter.

“In an effort to reduce labour hours whilst being cognisant of productivity levels, up to four operation modes can be stored to save on setup time,” Martin says.

In addition, the customised parameters can be quickly exported to other units via a pluggable storage module, the system bus, or Ethernet interfaces. Once again keeping productivity in mind, with control cabinets no longer required, the decentralised option minimises cabling effort for users, and since the inverter is supplied pre-assembled the electrotechnical effort doing installation is nominal.