Electricity + Control July 2018

COVER ARTICLE

Regenerative drive modules ACS880-11 and ACS880-14

FEATURES: · Control valves+ electric actuators · Energymanagement+ environmental engineering · IIoT+ Industry 4.0 · Drives,motors+ switchgear · Flowmeasurement+ instrumentation

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A BBregenerativedrivemodulesareoptimisedfor cabinet assembly. ACS880-11 and ACS880-14 frame R11 are compact and complete drive solu- tions, with everything needed for regenerative op- eration in cyclic or continuous braking applications. For high power applications ACS880-14 single drive module packages are available. The package consist of a regenerative supply unit with a line fil- ter and of a separate inverter unit. R8i modules are utilised in both units, and the package is ready-di- mensioned. Energy savings With regenerative functionality, the braking energy of the motor is returned to the drive and distribut- ed to the supply network so that it can be utilised by other equipment. Compared to mechanical or resistor braking, where braking energy is wasted as heat, regenerative drive operation offers signif- icant savings in energy consumption and cooling. The drive reaches a unity power factor. This high power factor indicates that electrical energy is used to its full potential. Minimised downtime Regenerative drive offers immunity to network dis- turbances. The drive will not interrupt the process or affect its quality in unstable supply network con- ditions. Drive’s active supply unit is able to boost output voltage, enabling full motor voltage even when the supply voltage is below nominal. The drive can even compensate for rapid variations in supply voltage, ensuring reliable operation during network fluctuations. Voltage boost capability can also be utilised to overcome a voltage drop caused by long supply or motor cables or output filters. Optimised cost and space Everything needed for regenerative operation, such as an active supply unit and low harmonic line filter are included, and no external braking devices are needed.

Advantages: • Quick, easy drive installation • Small installation footprint

• No need to add cooling to handle the heat generated by mechanical or resistor braking • Simplified wiring • Less spare parts needed Low harmonic content The drive produces exceptionally low harmonic content and exceeds the requirements of even the most stringent harmonic recommendations, like IEEE 519, IEC 61000-3-2, IEC 61000-3-12 and G5/4. Compared to conventional drives, the har- monic content is up to 97% lower. The total har- monic current distortion is typically <3% in nomi- nal situation and undistorted network.

For more information, visit http://new. abb.com/drives/regenerativedrives

Electricity + Control

JULY 2018

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