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Traction Catalogue
Railway Current &
Voltage Transducers
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Current and Voltage Transducers
for Railway applications
LEM solutions for traction electrical measurements
This catalogue summarizes
the most common LEM
product offerings for electrical
railway measurements. It is our
business to support you with
both standard and customized
products to optimize your
application.
Please contact LEM in your
region for assistance.
Today, high speed trains,
city transit systems (metro,
trams, and trolleybuses) and
freight trains are the solutions
against pollution and interstate
traffic immobility and provide a
significant energy savings.
Power electronics is essential to
drive and control energy in these
transportation systems.
LEM has been a main player
in traction power electronics
applications and development
for the last 45 years and leverages
this vast experience to supply
solutions for isolated current
and voltage measurements.
LEM transducers provide
control and protection signals to
power converters and inverters
that regulate energy to the
electric motors (for propulsion)
and to the auxiliaries (for air-
conditioning, heating, lighting,
electrical doors, ventilation,
etc.). This includes the early
monitoring of the voltage
network (changing by crossing
the European borders) to make
the powers electronics working
accordingly.
Although this is true for
on-board applications, LEM
has also provided the same
control and protection signals
for wayside substations.
The rail industry is under
constant changes and evolution.
As a recent example, the
privatization of the rail networks
raised new requirements for
which LEM provides: the on-
board monitoring of power
consumption (EM4T II Energy
Meter), solutions to trackside
applications, rail maintenance
and the monitoring of points
(switches) machines or signaling
conditions with some new
transducers families.
LEM is always available to assist
in adapting to these evolving
technical applications.
Four decades of railway
experience has contributed to
establishing LEM as a market
leader with worldwide presence
to serve you and provide the
efficient, safe and reliable
operation of the railways.
With more than 2 500 current
and voltage transducers in its
portfolio, LEM offers a complete
range of accurate, reliable and
galvanically isolated devices for
the measurement of currents
from 0.01 A to 20000 A and
voltages from 10 V to 6400 V
in various technologies: Open
Loop, Closed Loop, Isolating
digital technology, etc.
LEM transducers for railway
applications are designed
according to the most
demanding international
standards (EN50155, EN50124-
1, NFF 16101, 16102, etc) and
carry CE marking. UL or UR
is also available on selected
models.
We have worldwide ISO 9000
and ISO TS 16949 and IRIS
qualification and offer a 5-year
warranty on all of our products.
LEM constantly innovates
and strives to improve the