The coil shop uses its own in-house
facilities to draw and anneal the base
copper before manufacturing the
insulated copper strips. This enables very
short production schedules, especially
since the shop runs 24 hour shifts, if
necessary, and new coils are air-freighted
to the customer after passing all of the
inspections and electrical tests.
Danny Fox, Business Manager, Formed
Coil Manufacturing at Sulzer, explains:
"The new coils for M&M were created by
looping the copper strip to form a full size
coil. It was then carefully shaped to the
exact dimensions of the stator.
Our looping machines have the capacity
to produce 5 meter long diamond coils
and we also have the capacity to press slot
sections of up to 6 meters in length on our
half bars, meaning the entire bar length
can be anything up to 7-8 meters including
their overhangs."
"A high degree of automation and
the continuous qual ity control checks
throughout the processes ensure that
each and every coil is formed to exactly
the right size and shape. The design also
includes a precision-built mock-up of
a section of the stator, which is used to
double-check the final fit of every coil
before it is shipped to the client."
Ulises Osuna, Technical Manager for M&M
Bobinados Industriales, commented: "We
have been involved with the manufacture
and installation of high voltage coils for
over 45 years and the coils we received
from Sulzer were the best coils we have
ever installed. The improvements in
the design have certainly reduced the
installation time as well as improving the
efficiency of the generator, which makes
the coils very cost effective for the client."
Following this project, Sulzer is
hoping to work closely with M&M
and provide technical expertise as
well as manufacturing capacity to
the Colombian market.
At last year's ACOLGEN exhibition,
which was organized by the Colombian
Association of Electric Power Generators,
Sulzer and M&M shared a stand in order to
promote the benefits of this partnership. In
this way, it is anticipated that other clients
can also benefit from the turnkey services
offered by both Sulzer and M&M, including
faster delivery times.
www.sulzer.com
Issue 23 PECM
77