Motors and Drives


the pro version of the tool provides additional features such as custom parameter windows, control diagrams of the drive’s configuration and safety settings. The control diagrams save users from browsing a long list of parameters and help to set the drive’s logic quickly and easily. The PC tool can be connected to drives using a standard USB connection or an Ethernet connection. With one mouse click on the PC tool, all drive information


such as parameter lists, faults, back-ups and event lists, are gathered into a file, which can be emailed to maintenance personnel or to ABB for further analysis. This provides faster fault tracking, shortens downtime and minimizes operational and maintenance costs.


Integrated safety functions


The new common drives architecture comes with integrated safety functions. The integrated safety functions reduce the need for external safety components, simplifying the configuration and reducing installation space. The safety features include safe torque-off (STO)


as standard, which can prevent unexpected start-up or other stopping-related functions. In addition, the ABB industrial drives offer integrated safety options including safe stop 1 (SS1), safe stop emergency (SSE), safely-limited speed (SLS), safe brake control (SBC) and safe maximum speed (SMS). The drives’ functional safety complies with the requirements of the EU Machinery Directive 2006/42/EC.


Low energy consumption


While drives inherently save energy, details of just how much is saved are available through built-in calculators including


Fig. 3. The Drive composer PC tool, for all drive types, offers fast and harmonized start-up, commissioning and monitoring.


used and saved kWh and MWh, CO2 reduction and money


saved. The calculators provide information that helps to fine


tune the process to ensure optimum energy use. The energy consumption optimiser control mode ensures maximum torque per ampere and cuts energy drawn from the supply. l


Enter 61 or ✔ at www.engineerlive.com/ede


Ere Jääskeläinen is with ABB, Helsinki, Finland. www.abb.com/drives


Variable frequency drives can generate significant energy savings


become a primary focus across multiple industries. As a result, the use of variable frequency drives (VFDs) has increased significantly. Due to their ability to effectively match motor speeds to load requirements, these systems are more energy efficient and can generate significant energy cost savings.


W


While VFD systems provide many benefits, they may also


contribute to unplanned downtime. By their nature, VFD systems induce high frequency voltages; these voltages travel down the shaft seeking a path to ground and will discharge through the motor’s bearings or the bearings of coupled equipment. These discharges damage the bearings and


Fig.1. The Inpro/Seal Current Diverter Ring (CDR) and Motor Grounding Seal (MGS) safely divert harmful shaft currents away from the bearings to ground.


can lead to premature bearing failure and expensive downtime. Various shaft-grounding methods have


ith energy costs on the rise, energy efficient technologies have


been developed in an attempt to protect the bearings from premature failure. The latest development in shaft grounding technology is the Inpro/Seal Current Diverter Ring (CDR). Utilising proprietary conductive filaments, the CDR safely diverts shaft currents away from the bearings by providing a low impedance path to ground – extending equipment life and decreasing maintenance.


The Inpro/Seal Motor Grounding Seal (MGS) is designed for total bearing protection on severe duty applications; this unique technology protects against stray shaft currents and harmful contamination ingress. l


Enter 61A or ✔ at www.engineerlive.com/ede


Inpro/Seal is based in Rock Island, IL, USA and Glasgow, UK. www.inpro-seal.com


www.engineerlive.com 61


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