DSQC697 ABB distributed control system industrial DCS module card

Description

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All dry-type transformer components are in solid
form; they do not have flash points, nor do they
require bushings. Thus, major causes of fire and
spillage are eliminated. The ability to operate
at high temperatures gives these transformers
increased durability and overload capacity.
Furthermore, by minimizing the impact on the
environment and eliminating the risk of fire, total
costs can also be reduced. Consequently, dry-type
transformers are increasingly used in metropolitan
areas to step down three-phase medium-voltage to
low-voltage for power distribution.
There are a few limited applications in which water
may be used to cool the air or the conductor itself
inside a dry-type transformer. These applications
include installations where cold-water loops are
used to cool other equipment, eg, hydro generation,
marine vessels and offshore wind parks. All other
applications that use dry-type transformers employ
only solid components and are self-extinguishing;
in other words, in case of an arcing failure, no fire
will be sustained once the arc has dissipated. In
addition, the majority of insulating components can
be recycled; these materials can be placed in inert
landfills making waste management effortless and
cost-effective.