Controls News 13
54
Reference projects:
Energy efficiency at automotive supplier in China
With 30000 employees at its main lo-
cation in Shenzhen, China, Johnson
Electric produces more than three
million small motors a day. The elec-
tricity requirements correspond to the
consumption of nearly 50000 German
households. It is evident, at first sight,
that there is considerable potential for
savings here. Johnson Electric identi-
fied this potential and found in Saia-
Burgess a strong partner for optimiz-
ing its energy efficiency.
Energy monitoring
in a challenging environment for
people and technology
The main challenge for a targeted op-
timization of the energy requirements
is precise knowledge of the actual
situation. For this purpose, the energy
flows must be recorded and visualized.
The potential for savings can be iden-
tified and the appropriate measures
defined using an analysis of this data.
In order to carry this out quickly and
cost-effectively one S-Energy Man-
ager, over 270 Saia® Electronic energy
meters and three Saia® PCD3 devices
for data recording were installed in
the extensive industrial facilities. Even
in the harsh environment of a Chinese
factory, it was possible to connect the
Saia
®
S-Energy technology
in harsh Chinese industrial environment
Energy management in harsh industrial environment – Johnson Electric manages to
reduce the energy requirements using brains and smart ideas. High investment?
Wrong!
Authors: Daniel Ernst/Peter Steib
large number of energy meters to the S-Energy Man-
ager without any problems using several hundred
meters of bus cables. And this was possible even
though unshielded bus cables were laid next to high-
current cables and induction furnaces. The S-Energy
panels are equipped with an intuitive user interface.
This meant that the employees were able to start re-
cording the energy flows straight – away without any
training period and could therefore begin identifying
potential for optimisation immediately.
Save energy through evolution,
not through investment
This is themotto that Johnson Electric has followed in
optimizing its energy efficiency – and it has achieved
with considerable success. By simply recording
and analyzing the energy flows and implementing
straightforward measures, the employees were able
to reduce energy consumption in the manufacture of
motor shafts by 3% – and were able to do so without
any investment to speak of. The individual measures
are described on the next page. As a result, over EUR
40,000
of energy costs can now be saved every year,
but this is not the end of the story.
Incidentally, this does not only work in China. A con-
siderable potential for savings was also found at
Johnson Electric in Switzerland following the steps
taken in China and this potential was converted into
successful savings measures.
Presentation by Austin Wang «Energy-saving culture
through energy transparency»: Web code en1354a
PCD3 to record meter values
–
everything is not always
installed entirely in line with
standards
Energy counters in the
main distribution board
directly next to the
high-current cables
en1354
