GGeneral
Eaton protects transformer and distribution
systems with its Cooper Power™ series Bay-ONet
fuse assemblies. They are designed for
use in pad-mounted or subsurface distribution
transformers filled with Envirotemp™ FR3™
fluid, transformer oil or approved equivalent. The
assemblies combine the ease of hotstick operation
with the safety of deadfront construction.
Eaton offers its optional Cooper Power series
Flapper™ valve Bay-O-Net fuse assemblies
(available as sidewall-mounted only) with a flapper
valve inside the housing which closes when the
fuse holder is removed. (Refer to Figure 2.) This
results in minimal oil spillage from the transformer
tank which increases safety to line personnel
during fuse changeouts, reduces potential of
environmental concerns with oil spillage, reduces
potential of oil contamination on the molded rubber
elbow connections and reduces sensitivity to pad
tilting.
Silver-plated Flapper valve Bay-O-Net assemblies
are available and recommended for use with
the high ampere overload links. (See Catalog
CA132007EN.) Silver-plated contacts along with
the high ampere overload link allow the fusing of
larger kVA transformers.
For 38 kV Bay-O-Net fuse assemblies silver-plated
terminals and Flapper valves are standard. (See
Catalog CA132006EN for 38 kV Bay-O-Net Links.)
Removal of the fuse holder from the assembly
indicates that the apparatus is electrically
disconnected. It also allows convenient fuse
element inspection and replacement. When typical
safety practices are followed, the assemblies
can be loadbreak-operated for working on the
transformer secondary; changing distribution
voltage with dual voltage switches or tap changers;
or disconnecting the apparatus from the line
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