3adw000072r0601 dcs600 system description e f

61 line reactors for more information see publication

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Unformatted text preview: CS60x-1503-41/51/61/71 DCS60x-2003-41/51 DCS601-2003-61/71 ND13 ND14 ND15 ND16 ND16 * 3 3 3 3 3 on request on request on request on request on request - * with forced cooling Table 2.6/1: Line reactors (for more information see publication Technical Data) Fig. 1 Fig. 4 Fig. 2 Fig. 5 II F 2-18 3ADW000072R0601 DCS600 System description e f Fig. 3 Aspects of fusing for armature circuits and field supplies of DC drives Aspects of fusing for the armature-circuit and field supplies of DC drives General Conclusion for the armature supply Unit configuration Protection elements such as fuses or overcurrent trips are used whenever overcurrents cannot entirely be ruled out. In some configurations, this will entail the following questions: firstly, at what point should which protective element be incorporated? And secondly, in the event of what faults will the element in question provide protection against damage? Due to cost saving standard fuses are used instead of the more expensive semiconductor fuses at some applications. Under normal and stable operating conditions, this is understandable and comprehensible, as long as fault scenarios can be ruled out. AC supply: public mains / plant's mains Cabinet 2 3 . . . . . For field supply see Fig. 2.6/2 M 2 In the event of a fault , however, the saving may cause very high consequential costs. Exploding power semiconductors may not only destroy the power converter, but also cause fires. Adequate protection against short-circuit and earth fault, as laid down in the EN50178 standard, is possible only with appropriate semiconductor fuses. ABB's recommendations Semiconductor fuses Semiconductor fuses Fig. 2.6/1 Arrangement of the switch-off elements in the armature-circuit converter You will find further information in publication: Technical Guide chapter: Aspects for fusing DCS converter DCS converter 2-Q non-regen. 4-Q resp. 2-Q regenerative Semiconductor fuses M M Complies with Basic Principles on: 1 – Explosion hazard yes 2 – Earth fault yes 3 – “Hard“ networks yes 4 – Spark-quenching gap yes 5 – Short-circuit yes 6 – 2Q regenerative yes II F 2-19 3ADW000072R0601 DCS600 System description e f Conclusion for the field supply Basically, similar conditions apply for both field supply and armature-circuit supply. Depending on the power converter used (diode bridge, half-controlled bridge, fully controlled 4-quadrant bridge), some of the fault sources may not always be applicable. Due to special system conditions, such as supply via an autotransformer or an isolating transformer, new protection conditions may additionally apply. The following configurations are relatively frequent: In contrast to the armature-circuit supply, fuses are never used on the DC side for the field supply, since a fuse trip might under certain circumstances lead to greater damage than would the cause tripping the fuse in the first place (small, but long-lasting overcurrent; fuse ageing; contact problems; etc.). Semiconductor fuse F3.1 (super-fas...
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This note was uploaded on 08/22/2011 for the course EEE 230 taught by Professor Subramanian during the Spring '07 term at Berkeley.

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