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use the photovoltaic panels to their maxi-
mum efficiency in a safe manner.
At the heart of … uninterruptible
power
Imagine a world where power can fail.
A world in which data centres lose their
data, hospital equipment stops working
and systems come to standstill. Wherever
continuous, uninterruptible power is
critical, LEM’s Sentinel Battery Monitor-
ing System can monitor the condition of
standby batteries to ensure that they are
always ready to supply emergency back-
up power.
LEM ... at the heart of the future
Intelligent power management is critical
for conserving energy. As the world’s
leading manufacturer of transducers,
LEM is helping the world to move to-
wards a greener, more energy-efficient
future with products such as the Wi-LEM
Wireless Local Energy Meter. By show-
ing users exactly how much power is be-
ing used, Wi-LEM helps them to protect
the future by reducing their power con-
sumption.
LEM Intellectual Property SA
Transducers are the hidden heart of
power electronics
You use LEM transducers every day. They
are present in trains, buses, lifts, cars and
they help to protect vital equipment in
hospitals, airports and data centres. They
are in industrial motors, electric vehicles,
solar panels and wind turbines as well as
in battery-backed uninterruptible power
supplies (UPS) that provide continuous
power to computer servers.
LEM transducers help to make your world
safer and more energy efficient. They
provide the feedback signal which helps
to control the motors which drive a vast
number of machines, measuring com-
plex currents and voltages from as little as
0.1 A in drills, to 20000 A in electrolysis
equipment and up to 10000 V in the trac-
tion control for trains.
With higher accuracy and speed, the feed-
back signal from LEM transducers enables
smoother control and operation. They al-
so help to reduce energy consumption by
30% or more through the intelligent con-
trol of variable speed drives.
At the heart of … industry
LEM transducers help to make your world
a smoother place. In lifts, for example,
they help to prevent the doors closing
on passengers. They keep the cabin sta-
ble when people enter and ensure that
the lift rises and falls smoothly by adjust-
ing the torque of the motor. Their sig-
nals are also used to stop the lift at ex-
actly the right level.
At the heart of … transport
Trains propulsion is provided by electric
motors driven by inverters. These inverters
rely on LEM transducers to measure,
optimise and adjust the power that is
sent to the motors, improving both per-
formance and reliability. In electric and
hybrid cars, LEM transducers monitor
energy levels to and from the battery
as well as saving energy by controlling
electric power steering.
At the heart of … renewable energy
LEM transducers, specifically designed
for renewable power systems, control
the energy flow and waveform of power
sent to the grid from photovoltaic and
other renewable energy systems. They
measure the current to help optimally
position the turbine to the wind and to
