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Induction Motors - Protection and Starting

PublisherCircuit Breaker Industries (CBI)
Format58.6KB PDF, requires Acrobat Rdr 5Date added09 Nov 2000
Topics Line Protection Devices
Downloads416

This paper examines the sources and consequences of these inrush currents on the distribution system, as well as on the motor protection components. Recommendations are given in regard to the selection of both overcurrent and earth leakage protection of induction motors that consider not only the motor protection requirements, but also the limitations on the protection devices that may result from the abnormal circuit disturbances that could be introduced through the starter.The increasing use of power semi-conductor equipment, including variable speed drives has introduced a new dimension into power supply networks and the application problems of equipment connected to those systems. The most visible of these problems is the introduction of harmonics into the supply network.

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