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Unformatted text preview: CS60x-1503-41/51/61/71
ND16 * 3
3 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
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.
fuses M M Complies with Basic Principles on:
1 – Explosion hazard
2 – Earth fault
3 – “Hard“ networks
4 – Spark-quenching gap
5 – Short-circuit
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.
- Spring '07