Technical Information

ITC series Current Transducers
DC & AC Class accuracy R current measurement

DC & AC Class accuracy R Current Measurement

ITC series Current Transducers
Measure DC and AC currents with a Class accuracy R (Railway)
Market regulations require improvements for Railway
Energy Billing.
• European rail freight markets are liberalized (privatizationof the rail networks into infrastructure and operators)• Since the beginning of January 2010 passenger rail
markets are opened to cross-border competition
Liberalization of European railway markets leads to:• new competitors in each national market• increasing cross-border traffic• new situation concerning intra- und inter-modal
competition• rising demands in terms of cost transparency (exact
electricity consumption must be invoiced)
Traction Units consume energy in different countries along
their way:
• Railway Undertaking (RU) have contractual relationships
with the respective Infrastructure Manager (IM)• In order to be able to transparently bill the energy
consumption, the RU will need information regarding
each border crossing• The IM has to invoice the RU for the supply of energy
The on-board Energy Measuring System (EMS) is thesystem for measurement of electric energy taken from orreturned (during regenerative braking) to the overheadcontact line (OCL) by the traction unit, supplied from theexternal electric traction system.
This energy measurement allows the operators to better
understand their real consumption and will enable energy
management to reduce energy consumption for example.
The Energy Measurement Function (EMF), includes voltage
and current measurement.
The new EN 50463 standard defines characteristicsof transducers for current and voltage DC or AC
measurement as well as the energy measurement function.

2

In order to fulfill this standard, LEM proposes different
solutions for current and voltage measurements:• DV family for DC voltage measurement Class 0.5R for asingle network voltage• ITC family for DC current measurement Class 0.5R
Common features:• Measurement of all types of signals: DC, AC, pulsed andcomplex• Compact size
• High galvanic insulation between primary (high power)
and secondary circuits (electronic circuit)• Low consumption technology• Excellent accuracy to suit to high demanding
applications such as energy metering• Low temperature drift of accuracy• High insulation and partial discharge levels in order toguarantee safety• Good immunity against external electric, magnetic andelectromagnetic fields for EMC protection• Low level of emission• Compliant to fire and smoke, mandatory in railway
applications• Low influence of common mode voltage• Fast response time
• Large bandwidth• Low noise• Modular approach allows easy adaptation with various
connections available for the secondary side likeconnectors, shielded cables, terminals (threaded studs,
M4, M5, UNC ect) according to customer specifications• Reliability and lifetime are guaranteed by the quality indesign and process and ageing tests

separately and combined for the overall accuracy
using the following formula:

The accuracy of current transducer, voltage
transducer and Energy Meter is measured

ε

EMF

With

e
e
e
e

ε

2
+
VMF

=

ε

2
+
CMF

ε

2
ECF

= Overall accuracy of EMF (system of current sensor, voltage sensor and energy meter)=
Class accuracy of Voltage Measurement Function (Voltage transducer)
VMF
CMF = Class accuracy of Current Measurement Function (Current transducer)
ECF = Class accuracy of Energy Calculation Function (Energy meter)
EMF

The EN 50463 gives the following details for the measurement of DC & AC currents:
Percentage error limits — DC current transducers± Maximum percentage current (ratio) error at percentage of rated
primary current (IPN) shown below, DC transducers
Temperature condition: 23°C+/-2°C

Accuracy class1)

1 % 1)

5%

10 %

20 %

100 %

120 %

0,2 R

2

0,4

0,2

0,2

0,2

0,2

0,5 R

5

1

0,5

0,5

0,5

0,5

0,75 R

7,5

1,5

0,75

0,75

0,75

0,75

1R

10

2

1

1

1

1

For AC current transducers, the maximum permissible error e.g. for Class 1R at 1% of IPN is 5%, for Class 0.5R it is 2.5%.
± Maximum percentage error limits
Value of current

System type

Ambient temperature variation, main range-10 °C to +50 °C(or +60 °C for indoor)

Ambient temperature variation,
extended range-40 °C to –10 °C(and +60 °C to +75 °C for indoor)

10 % IPN ≤ I ≤ 120 % IPN

AC and DCNb) + (0,01 × DΔTa))Nb) + (0,02 × DΔΔTa))

5 % IPN ≤ I < 10 % IPN

AC and DCNb) + (0,02 × DΔTa))Nb) + (0,04 × DΔΔTa))

1 % IPN ≤ I < 5 % IPN

AC and DCNb) + (0,1 × DΔTa))Nb) + (0,2 × DΔΔTa))

DT is the temperature variation in Kelvin between reference temperature 23 °C and the ambient temperature.
The term N is the maximum allowed percentage error for the current transducer according to the Accuracy class as specified in thetable above. For example, for a class 0,5 R current transducer and input signal in the range 10 % IPN ≤ I ≤ 120 % IPN, the formula for main
temperature range becomes 0,5 + (0,01 x DΔT) and for the input signal in the range 5 % IPN ≤ I < 10 % IPN the formula becomes 1,0 +(0,02 x ΔDΔT).
a)b)Maximum percentage error for a current transducer including ambient temperature variation.

Accuracy class± Mean temperature coefficient (%/K)

1 % IPN ≤ I < 5 % IPN

5 % IPN ≤ I < 10 % IPN

10 % IPN ≤ I ≤ 120 % IPN

0,2 R

0,175

0,04

0,02

0,5 R

0,2

0,05

0,025

0,75 R

0,225

0,06

0,03

1,0 R

0,25

0,07

0,035

Temperature coefficient for current transducer.

3

DC & AC Class accuracy R Current Measurement

The Energy Measurement Function must have a total
accuracy of 1,5 % for AC and 2 % for DC at + 25°C.

Standards

Energy measurement
EN 50463

EMC
EN 50121-3-2

These transducers comply to the EN 50463
standard for energy measurement:

These transducers comply to the EN 501213-2 standard for emission and susceptibility(railway EMC standard) in its latest update,with EMC constraints higher than those of thetypical industrial application standards.

• DV family for DC voltage measurement Class 0.5R
for a single network voltage• ITC family for DC current measurement Class 0.5R
It is possible to use these transducers for bi voltage
applications (when switching from a network toanother one when crossing) with a slightly derated
accuracy.
These transducers have a very low sensitivity toexternal magnetic DC or AC fields.

CE Marking 2004/108/EEC &Low voltage directive
The DV, ITC products are CE marked as aguarantee of the product compliance to theEuropean EMC directive 2004/108/EEC and low
voltage directive. They also comply with the derived
local EMC regulations (EMC: Electro-Magnetic
Compatibility).

Insulation and safety
EN 50124-1
The EN 50124-1 (“Basic requirements – clearancesand creepage distances for all electrical andelectronic equipment”) standard has been used
as a reference to design the creepage andclearance distances for the DV, ITC products.

Traction standard
EN 50155
The EN 50155 standard dedicated to “Electronic
Equipment used on Rolling stock” in railway
applications is our standard of reference forelectrical,
environmental
andmechanicalparameters.
It guarantees the overall performances of our
products in railway environments.

Fire and smoke
NFF 16101/102
Materials used for the DV,    ITC products comply
with the NFF 16101/2 standards for fire and smoke
classification (tests report for materials available on
request).

4

IRIS
Our main production centerstransducers are IRIS certified.

fortraction

ISO 14000
LEM is proud to be able to contribute toenergy savings and is certified ISO 14001 forenvironmental management standards.

High Isolation
Class 0.5R accuracy
The ITC transducer series comprises three models to measure a current up to 4000 A RMS (6000 Apk) in vehicles thatare supplied with energy from networks up to 3000 V. The transmission of power and signals from a high voltage
environment to a low voltage environment requires specific insulation features depending on the application. The
ITC series fulfills all the necessary standards to enable these features.
These models are available for Traction and Industry applications.
ITC transducers have been specially designed for the railway environment and to respond to the energy
measurement function evolution requiring better performances, ITC series is Class 0.5R measurement accuracy
when Class 1R is required by the pr EN50463 standard for on-board energy monitoring. ITC models are notsensitive to the position of the conductor inside their apertures.
Beside the possible function in the Energy Measurement Systems, they can easily be used everywhere an accuracyof 0.5 % from 5 % to 120 % of the nominal current is required.
To reach this Class 0.5R accuracy, LEM used the Closed loop Fluxgate technology.

5

ITC series Current Transducers: Main Characteristics

ITC series Current Transducers

ITC series Technology

ITC series: Closed loop Fluxgate Technology
For accurate measurement of DC currents, the methods
consist in compensating the current linkage ΘP createdby the current IP to be measured by an opposing
current linkage ΘS created by a current IS flowing
through a known number of turns NS, to obtain (fig. 1):

To obtain an accurate measurement, it is necessary
to have a highly accurate device to measure thecondition Θ = 0 precisely. The aim is to obtain a current
transducer with the following characteristics:

ΘP - ΘS = 0 or NP ·IP - NS·IS = 0 with NP: Number ofprimary turns and NS: Number of secondary turns• Outstanding long-term stability• Excellent linearity• Low residual noise• High frequency response• High reliability

Operation principle
To achieve accurate compensation of the two opposing
current linkages (ΘP, ΘS), a detector capable ofaccurately measuring Θ = 0 must be available, whichmeans that the detector must be very sensitive tosmall values of a residual magnetic flux Ψ (created by
the current linkage Θ) in order to achieve the greatest
possible detector output signal.

Fig 1. Closed loop current transducer Principle

Fluxgate detectors rely on the property of manymagnetic materials to exhibit a non-linear relationshipbetween the magnetic field strength H and the flux
density B.

Fig 2. Hysteresis cycles of the magnetic coresFig 3. Full bridge to drive Fluxgate (saturable inductor)

The hysteresis cycles of the magnetic cores have a form comparable to the one represented in fig. 2 (more or lesssquare according to the type of material used).
Observing B = f(H) on the magnetization curve, notice that for a given field strength H1 a flux density variation ∆B1
corresponds to ∆H1. But, also observe that further along the cycle, for another given field strength H2, for the same
variation ∆B2 = ∆B1 , the ∆H2 variation must be much greater.
The detection of the zero flux condition (Ψ = 0) is based on this phenomenon.

6

ITC series Technology

IP = 0IP = 10 A, no compensation

Fig 4. Square wave voltage; Current created; Asymmetry of the created current

A full bridge (Fig. 3) is used to drive the Fluxgate. A current, IFluxgate is created, flowing alternately through S1 / S4
and through S3 / S2, this current being measured by adequate means. When applying a square wave voltage (yellow
signal) to a saturable inductor until its magnetic core starts to saturate, a current is created. Without primary current
IP =0, this current is symmetric.
When a DC current flows through the aperture of the core, the curve of the hysteresis cycle is then shifted causing
asymmetry of the current produced by the square wave voltage, (Fig 4).
This current is then measured using an accurate resistor and allows to adjust the secondary current in thecompensation winding so that it perfectly compensates the primary current.

The accuracy of the measurement will not only dependon the accuracy of the measured Fluxgate current,
IFluxgate, but also strongly on the sensitivity of the flux
detector. However, in spite of the DC measurement
function accuracy, there are some drawbacks to thisDC measurement system (fig. 5).
As the winding “D” of the flux detector is coupled withthe compensation winding “S”, the applied square wave
voltage is re-injected into the compensation winding
and creates a parasitic current in the measurement
resistor.
However, the square wave voltage induced in the S
winding by this flux may be practically cancelled out
when a second D’ winding is mounted on a second
detector core (identical to D) inside the compensation
winding S. The residual flux (the sum of the opposed
fluxes in D and D’) will create very small voltage peaks
correlated with the fluxgate excitation (fig. 5).

Fig 5. Solution against voltage peaks re-injection

7

ITC series Technology

ITC series technology description• Regulation of secondary current

Fluxgates are self-oscillating, their currents aremeasured by the micro controller through an A/D
converter. A micro controller is used for different
reasons:• Protection management(supplies, over-voltage, overload)• Output stages and Fluxgate management• Synchronous rectifier of fluxgate signal

The output of secondary current regulator is converted
into an analogue value using a D/A converter that gives
the reference to the PWM generator for the output stage.

• Low pass filter• Compensation of offset and reduction of offset drift(micro controller replaces analogue circuits)

ITC Technology: Bloc schematic

Fluxgate D Fluxgate D'

Supplies

Supplies
monitoring
Overvoltage
Protection

Fluxgate
Oscillator

OV Protection

Micro-Controller

Offset Correction
Compensation Coil-

Synchronous
RectifierPI
Regulator+

LP Filter

DAC 0

Output

Power
Stage

Fluxgate Current
Fault_PS
RM

Test Winding

Balancing output
Class D output stage

Main output
Class D output stage

Closed loop Fluxgate ITC technology features

IP
M8

L4
M7
pwm2

C3

M6

IS

Ibal

L3

M5

Rm2

C4

pwm1

+

V5

-

24

+

V6

-

24

• Excellent linearity• Better than Class 0.5R according to EN 50463• Outstanding long-term stability• Low residual noise• Very low sensitivity to high external DC and AC fields• High temperature stabilityIN

Fig 6. Class D output current generator

The Class D switch mode output stage (Fig. 6) is used to reduce losses, and then avoid using a heat sink outside thetransducer.
In switched-mode amplifier, both transistors of the output bridge are switched on alternatively by a PWM signal
which duty cycle is varied to adjust the output voltage.
The losses are therefore only caused by the conduction and commutations losses of the semiconductors.
Compared to the standard Class AB (linear), the Class D allows the losses in the semiconductors to be reduced bya factor close to 5 improving also the reliability of the electronics. A LC filter removes most of the high frequency
harmonics to keep the output noise low.
A second switch mode output stage is added only for balancing supply currents between positive and negative
power supply (LEM patent).
Ibal is regulated to be exactly -IS.
8

Absolute maximum ratings (ITC 4000-S)
Parameter

SymbolValue

Maximum supply voltage (working) (-40..85°C)± VC±26.4 V

Maximum input currentIP

100 kA

Maximum steady state input current  (-40..85°C)

IPN

4000 ARMS

Insulation characteristics
Parameter

SymbolUnit

Min

Comment

RMS voltage for AC insulation test 50/60 Hz /1 min

Vd

kV

14

100% tested in production

RMS voltage for partial discharge extinction @ 10 pC

Ve

V

5000

Bar with centered bar Ø 95 mm

Clearance distance (pri. - sec.)

dCl

mm

88

Shortest distance through air

Creepage distance (pri. - sec.)

dCp

mm

171

Shortest path along device body

Comparative Tracking Index of case material

CTI

V

600

Environmental and mechanical characteristics
Parameter

Symbol

Unit

Min

Typ

Max

Ambient operating temperature

TA

°C

-40

85

Ambient storage temperature

TS

°C

-50

85

Mass

m

kg

8.6

ITC 4000-S typical accuracy over the whole temperature range and over the possible supply voltages variations; thegreen lines are the EN 50463 standard requirements (specifications) at 23 °C ambient temperature (fig.7).

High accuracy overtemperature range
and over measuring
range

5%
104

1%

0.5%

X (ppm of reading)X (ppm)

103
102
101
100
10-1
10-2
10-3
100

101
I IP I / IPN (%)

2

10

9

ITC series Current Transducers: Main Characteristics

ITC Series Current Transducers: Main Characteristics

ITC series Current Transducers: Main Characteristics

ITC series reaches the Class 0.5R measurement accuracy
according to Pr EN 50463.
Linearity error is less than 0.05% of peak current, offset
currents less than +/- 20 µA are really stable, and offset drift intemperature is less than 100 µA. ITC models provide a current
output thanks to the Class D amplifier.
With the use of the double Class D output current generator,
the supply currents are balanced and reduced versus atransducer using a Class AB amplifier.
The supply current is always positive and almost equal on
both supplies: 0.3 A at nominal output current on each power
supply polarity (Fig. 8), electronic losses are less than 6 W
when supplied under +/- 24 V.
For instance, using a Class AB amplifier would have required a
supply current of 1.6 A and would have created 30 W of losses
at nominal current.

100 kA means not less than 40 A on the secondary of the
ITC 4000-S, and to protect the internal components andcustomer burden resistance, but also printed circuit tracks, aspecial dedicated electronic circuit has been designed. This
protection is working with or without power supply, as well aswith measuring resistor installed or not.
If the primary current becomes higher than the measuring
range, the electronics cannot maintain the flux compensation.
If this state lasts too long, the fluxgate detector becomescompletely saturated and unable to measure the flux error.
When this happens, the transducer stops for 300 to 500 ms
and then sweeps the output current to find the point at which
compensation is correct again and the normal function canresume.
In addition to the analog current output, these models offer
a logic output called “/VALID” (open collector) indicating thetransducer state (operational status).
The pull-up resistor is external to the transducer. It is activated(pulled to 0V) to indicate that the regulation of the output
current works normally. It is deactivated (pulled to the highlevel) to indicate that the output current is not the exact imageof the primary current. It happens during the start-up of thetransducer, after a large overcurrent, if there is an internal fault
or if the measuring resistance is disconnected while a primary
current is present.
A test winding is part of the ITC models which can be used
for a re-verification of the transducer in the application, forexample in the ITC 4000, 1 A in the test winding simulates 400
A primary, representing 10% of the nominal current.

Fig. 8. Consumption currents on each power supply polarity
in regards with the primary current (RM = 0.1 Ω, ± VC = ± 24 V)(both supply currents are identical)
Use of large heatsink is not anymore necessary due to thislosses reduction leading to current transducer largely reducedin size.
With less current consumption needed, power supplies tobe associated with the ITC transducers can be of a lower
capacity and then cheaper.

It is then easy to check accuracy of the transducer on board
by using a small current.
ITC transducers are insensitive to the position of the primaryconductor within their large measurement aperture, offer highinsulation test voltage of up to 14 kVRMS/50 Hz/1 min (ITC 4000
model), and have excellent immunity to external interferences(such as magnetic fields typical of the rail environment).
Bandwidth for the ITC 4000-S & ITC 2000-S is 80 kHz (3 dB)
and the transducers’ apertures allow the insertion of large
conductors: 102 mm diameter (for the ITC 4000-S) or 63 mm
diameter (for the ITC 2000-S).
3 models form the ITC range today: ITC 1000-S, 2000-S and
4000-S, with corresponding nominal current measurement of
1000, 2000 and 4000 ARMS.
They are proposed in either a one-piece housing (ITC 4000-S
model), or a split construction (ITC 1000 and 2000-S models)with the measuring head in a case, and its control electronic
mounted remotely in a metal enclosure, to facilitate locating
the measuring head in confined spaces such as the train roof
space.

Fig. 9. Supply current function of supply voltage (IP=0)This technic is however creating a ripple of about 25 mA.t
within the bandwidth 80 kHz and 3 A.t within the bandwidth
200 kHz, this noise can be easily reduced with the use of afilter.
High primary current overloads can occur in traction
applications, that’s why ITC series has been designed tosupport high overloads until 100 kA/100 ms.

10

They have been designed for the rail-traction industry sector,
reaching the Class accuracy 0.5R defined in the prEN 50463
standard for on-board energy monitoring operating over thetemperature range –40 to +85°C.
Beside the possible function in the Energy Measurement
Systems, they can easily be used everywhere an accuracy of
0.5 % from 5 % to 120 % of the nominal current is required.

At TA = 25 °C, VC = ± 24 V, RM = 0.1 Ω, unless otherwise noted.
Parameters with a * in the conditions column apply over the –40.. 85°C ambient temperature range.

Electrical data ITC 4000-S
Parameter

Symbol

Unit

Min

Typ

Max

Primary nominal current, RMS

IPN

A

Primary current, measuring range

IPM

A

Measuring resistanceRMΩSecondary nominal current, RMS

ISN

A

Output range

IS

A

-2.4

Supply voltage

±VC

V

±21.6

Current consumption

IC

mA

45

Number of secondary turns

Ns

2500

Number of turns (test winding)

NT

400

Offset current referred to primary

IO

mA

Magnetic offset current, referred to primary

IOM

mA

Offset drift referred to primary

IOT

mA

Sensitivity

G

mA/A

Sensitivity error

ε

%

-0.05

-0.0002

0.05

Thermal drift of sensitivity

ε

%

-0.01

0.0005

Linearity errorεL% of IPM-0.01

Overall accuracy at IPN

XG% of IPN

Overall accuracy at IPN

XGOverall accuracy

Conditions

4000

*

-6000

6000

*

0

1

*

1.6

*

2.4

*

±24

±26.4

*

57

±70

IP=0, ±VC=±24V, valid for+ and - supplies (fig.8 & 9)50

100% tested in production

1.6

-50

3
5

for IPM <6kA, max value of R M
on the datasheet

After IP = 15 kA*-40 .. 85°C, 100%
tested in production

0.01

*

-40 .. 85°C

-0.0004

0.01*±6000 A range-0.05-0.0003

0.05*-40 .. 85°C

% of IPN-0.05-0.0003

0.05

25°C; 100% tested in
production

XG% of reading@ 10% IPN

-0.2

-0.0030.2

23°C; 100% tested in
production

Overall accuracy

XG% of reading@ 5% IPN-0.4-0.0050.4

23°C; 100% tested in
production

Overall accuracy

XG% of reading@ 1% IPN

-2

-0.03

2

23°C; 100% tested in
production

Overall accuracy

XG% of reading@ 0.4% of IPN

-5

-0.08

5

Output current noise referred to primary

ino

A RMS

3.2

Reaction time @ 10 % of IPN

tra

µs

0.1

Response time @ 90 % of IPN

tr

µs

0.1

Frequency bandwidth

BW

kHz

82,45,11ms

400

Start-up time

G

GT

-250

-3

250

0.4

1 Hz to 1 MHz
0 to 4000 A step with a di/dt =100 A/us
3 dB, 100 A
1 dB, 100 A
0.1 dB, 100 A

500

*

11

ITC series Current Transducers: Main Characteristics

ITC series Current Transducers Main Characteristics: Electrical data

ITC series Current Transducers: Mechanical Characteristics

ITC 4000-S Current Transducer: Dimensions

Dimensions in mm. 1 mm = 0.0394 inches

SafetyThis transducer must be used in electric/electronic equipmentwith respect to applicable standards and safety requirements inaccordance with the manufacturer’s operating instructions.

Mechanical characteristics
General tolerance± 1 mmFastening of transducer

4 slots dia. 11 mm
4 steel screws M10

Recommended fastening torque 11.5 Nm (±10%)
Primary through-holedia. 102 mm

Connection of secondary

M5 insert

Caution, risk of electrical shock

F

When operating the transducer, certain parts of the module cancarry hazardous voltage (eg. primary busbar, power supply).

Recommended fastening torque 2.2 Nm. (±10%)Ignoring this warning can lead to injury and/or cause serious damage.

RemarkThis transducer is a built-in device, whose conducting parts
must be inaccessible after installation.

• Temperature of the primary conductor should not exceed 85 °C• Dynamic performances (di/dt and response time) are best witha single bar completely filling the primary hole.
• This is a standard model. For different versions (supply
voltages, turns ratios, unidirectional measurements…) pleasecontact us.
• IS is positive when IP flows in direction of the arrow• The secondary cables have to be routed together all the way.
• Installation of the transducer is to be done without primary
current or secondary voltage present.

12!

A protective housing or additional shield could be used.
Main supply must be able to be disconnected.

At TA = 25 °C, VC = ± 24 V, RM = 0.1 Ω, unless otherwise noted.
Parameters with a * in the conditions column apply over the –40.. 85°C ambient temperature range.

Electrical data ITC 2000-S/SP1
Parameter

Symbol

Unit

Min

Typ

Max

Primary nominal current, RMS

IPN

A

Primary current, measuring range

IPM

A

Measuring resistanceRMΩSecondary nominal current, RMS

ISN

A

Output range

IS

A

-1.2

Supply voltage

±VC

V

±21.6

Current consumption

IC

mA

45

Number of secondary turns

Ns

2500

Number of turns (test winding)

NT

200

Offset current referred to primary

IO

mA

Magnetic offset current, referred to primary

IOM

mA

Offset drift referred to primary

IOT

mA

Sensitivity

G

mA/A

Sensitivity error

ε%-0.005-0.0002

0.005

Thermal drift of sensitivity

ε

%

-0.01

0.002

Linearity errorεL% of IPM-0.01

Overall accuracy at IPN

XG% of IPN

Overall accuracy at IPN

XGOverall accuracy

Conditions

2000

*

-3000

3000

*

0

2

*

0.8

-10

for IPM <3kA, max value of RM
on the datasheet

*
1.2

*

±24

±26.4

*

54

±70

IP=0, ±VC=±24V, valid for+ and - supplies

10

100% tested in production

4
5

After IP = 10 kA*-40 .. 85°C, 100%
tested in production

0.01

*

-40 .. 85°C

-0.0004

0.01*±3000 A range-0.01-0.00150.01*-40 .. 85°C

% of IPN-0.01-0.00150.01

25°C; 100% tested in
production

XG% of reading@ 10% IPN

-0.1

-0.0040.1

23°C; 100% tested in
production

Overall accuracy

XG% of reading@ 5% IPN-0.2-0.0150.2

23°C; 100% tested in
production

Overall accuracy

XG% of reading@ 1% IPN

-1

-0.03

1

23°C; 100% tested in
production

Overall accuracy

XG% of reading@ 0.4% of IPN

-2.5

-0.3

2.5

23°C; 100% tested in
production

Output current noise referred to primary

ino

A RMS

2

Reaction time @ 10 % of IPN

tra

µs

0.1

Response time @ 90 % of IPN

tr

µs

0.1

Frequency bandwidth

BW

kHz

27,23,3ms

400

Start-up time

G

GT

-50

10

50

0.4

1 Hz to 1 MHz
0 to 2000 A step with a di/dt =100 A/us
3 dB, 100 A
1 dB, 100 A
0.1 dB, 100 A

500

*

13

ITC series Current Transducers: Main Characteristics

ITC series Current Transducers Main Characteristics: Electrical data

ITC series Current Transducers: Mechanical Characteristics

ITC 2000-S/SP1 Current Transducer: Dimensions

Dimensions in mm. 1 mm = 0.0394 inches

SafetyMechanical characteristics
General tolerance± 1 mmFastening of measuring head4 slots dia. 7 mm
4 steel screws M6

Recommended fastening torque 5 Nm (±10%)
Primary through-holedia. 63 mm

Fastening of electronic module 4 screws M5
Recommended fastening torque 5 Nm (±10%)
Connection of secondary

D-Sub maleconnector 15 cts

Remark• Temperature of the primary conductor should not exceed
100 °C• Dynamic performances (di/dt and response time) are best witha single bar completely filling the primary hole.
• For different versions (supply voltages, turns ratios,
unidirectional measurements…) please contact us.
• IS is positive when IP flows in direction of the arrow• The secondary cables have to be routed together all the way.
• Installation of the transducer is to be done without primary
current or secondary voltage present.

14

This transducer must be used in electric/electronic equipmentwith respect to applicable standards and safety requirements inaccordance with the manufacturer’s operating instructions.

!

Caution, risk of electrical shock

F

When operating the transducer, certain parts of the module cancarry hazardous voltage (eg. primary busbar, power supply).
Ignoring this warning can lead to injury and/or cause serious damage.
This transducer is a built-in device, whose conducting parts
must be inaccessible after installation.
A protective housing or additional shield could be used.
Main supply must be able to be disconnected.

LEM’s Warranty
5 Year Warranty
on LEM Transducers
5 Year Warranty on LEM Transducers
We design and manufacture high quality and highly reliable products for our customers
all over the world.
We have delivered several million current and voltage transducers since 1972 and most ofthem are still being used today for traction vehicles, industrial motor drives, UPS systems andmany other applications requiring high quality standards.
The warranty granted on LEM transducers is for a period of 5 years (60 months) from the dateof their delivery (not applicable to Energy-meter product family for traction
and automotive transducers where the warranty period is 2 years).
During this period LEM shall replace or repair all defective parts at its’ cost (provided thedefect is due to defective material or workmanship).
Additional claims as well as claims for the compensation of damages, which do not occur on
the delivered material itself, are not covered by this warranty.
All defects must be notified to LEM immediately and faulty material must be returned to thefactory along with a description of the defect.
Warranty repairs and or replacements are carried out at LEM’s discretion.
The customer bears the transport costs. An extension of the warranty period following repairs
undertaken under warranty cannot be granted.
The warranty becomes invalid if the buyer has modified or repaired, or has had repaired by athird party the material without LEM’s written consent.
The warranty does not cover any damage caused by incorrect conditions of use and cases offorce majeure.
No responsibility will apply except legal requirements regarding product liability.
The warranty explicitly excludes all claims exceeding the above conditions.
Geneva, 21 June 2011

François Gabella
President & CEO LEM
15

Europe • Middle East
Africa • America
Asia • Pacific

LEM International Sales Representatives

Austria and CEE
LEM Deutschland GmbH
Office Austria
Concorde Business Park 2/F/6
A-2320 Schwechat
Tel. +43 1 706 56 14-10
Fax +43 1 706 56 14-30
e-mail: tbu@lem.com
Belarus and Baltic Republics
DACPOL Sp. z. o. o.
ul. Pulawska 34
PL-05-500 Piaseczno
Tel. +48 22 7035100
Fax +48 22 7035101
e-mail: dacpol@dacpol.com.pl
BeNeLux
LEM Belgium sprl-bvba
Route de Petit-Roeulx, 95
B-7090 Braine-le-Comte
Tel. : +32 67 55 01 14
Fax : +32 67 55 01 15
e-mail : lbe@lem.com
Bosnia, Croatia, Herzegovina,
Serbia and Slovenia
Proteus Electric S.r.l.
Via di Noghere 94/1
I-34147 Muggia-Aquilinia
Tel. +39 040 23 21 88
Fax +39 040 23 24 40
e-mail: dino.fabiani@
proteuselectric.it

Bulgaria, Hungary
ineltron GmbH
Hugenottenstr. 30
D-61381 Friedrichsdorf
Tel.: +36 20 7711744
Tel.: +49 (0)6172 598809
Fax.:+49 0)617275933
email: i.laszlo@ineltron.hu

Germany
Central Ofﬁce:
LEM Deutschland GmbH
Frankfurter Strasse 74
D-64521 Gross-Gerau
Tel. +49 6152 9301 0
Fax +49 6152 8 46 61
e-mail: info-lde@lem.com

Czech Republic, Slovakia
PE & ED, spol. s r.o.
Koblovska 101/23
CZ-71100 Ostrava
Tel. +420 596 239 256
Fax +420 596 239 531
e-mail: peedova@peed.cz

IsraelOfer Levin TechnologicalApplication
PO Box 18247
IL- Tel Aviv 611 81
Tel.+972 3 5586279
Fax +972 3 5586282
e-mail: ol_teap@netvision.net.il
ofer.levin@tec-apps.co.il

FinlandETRA Electronics Oy
Lampputie 2
FI-00740 Helsinki
Tel. +358 207 65 160
Fax +358 207 65 23 11
e-mail: markku.soittila@etra.ﬁ
Field Applications Engineer
Mr. Pasi Leveälahti
Kausantie 668, 17150 Urajärvi
Tel. +358 50 5754435
Fax +358 37667 141
e-mail: pli@lem.com
FranceLEM France Sarl
15, avenue Galois
F. 92340 Bourg-La-Reine
Tel. +33 1 45 36 46 20
Fax +33 1 45 36 06 16
e-mail: lfr@lem.com

Italy
LEM Italia Srl
via V. Bellini, 7I-35030 Selvazzano Dentro, PD
Tel. +39 049 805 60 60
Fax +39 049 805 60 59
e-mail: lit@lem.com
PolandDACPOL Sp. z o.o.
ul. Pulawska 34
PL-05-500 Piaseczno
Tel. +48 22 7035100
Fax +48 22 7035101
e-mail: dacpol@dacpol.com.pl

South Africa
Denver Technical Products Ltd.
P.O. Box 75810
SA-2047 Garden View
Tel. +27 11 626 20 23
Fax +27 11 626 20 09
e-mail: denvertech@pixie.co.za

UNITED STATES OF AMERICA,
CANADA, MEXICO
Central Office
LEM U.S.A., Inc.
11665 West Bradley Road
Milwaukee, Wi 53224
USA
Tel. +1 414 353 0711
Toll free: 800 236 5366
Fax +1 414 353 0733
e-mail: lus@lem.com

Australia and New Zealand
Fastron Technologies Pty Ltd.
25 Kingsley Close
Rowville - Melbourne Victoria 3178
Tel. +61 3 9763 5155
Fax +61 3 9763 5166e-mail: sales@fastron.com.au

LEM Electronics (China) Co., Ltd.
Shanghai Office, R510,
Hualian Development Mansion,
No. 728 Xinhua Road
Changning District
Shanghai, 200052, P.R. China
Tel. +86 21 3226 0881
Fax +86 21 5258 2262
e-mail: bjl@lem.com

India
LEM Management Services SarlIndia Branch Office
Mr. Sudhir Khandekar
Level 2, Connaught Place,
Bund Garden Road, Pune-411001
Tel. +91 22 403 09 404
Mobile +91 98 3 313 52 23
e-mail: skh@lem.com

LEM Electronics (China) Co., Ltd.
Shenzhen OfficeR1205, LianTai Mansion, Zhuzilin
Shennan Avenue, Futian District,
Shenzhen 518040 P .R. China
Tel. +86 755 3334 0779
+86 755 3336 9609
Fax. +86 755 3334 0780
e-mail: bjl@lem.com

GLOBETEK
No.122, 27th Cross,
7th Block, Jayanagar,
Bangalore-560070-INDIA
Tel. +91 80 2663 5776
+91 80 2664 3375
Fax. +91 80 2653 4020
e-mail: sales@globetek.in

LEM Electronics (China) Co., Ltd.
Hefei Office, R804,
Qirong Building, No. 502 WangjiangWest Road, High-tech Zone
Hefei, Anhui, 230022 P.R. China
Tel. +86 551 530 9772
Fax. +86 551 530 9773
e-mail: bjl@lem.com

LEM Electronics (China) Co., Ltd.
Xi‘an OfficeR703, Tower A
Jinqiao International Plaza
No. 50, Technology Road
High-tech District, Xi’an,
Shanxi, 710075 P.R. China
Tel. +86 29 8833 7168
Fax +86 29 8833 7158
e-mail: bjl@lem.com

Japan
LEM Japan K.K.
2-1-2 Nakamachi
J-194-0021 Machida-Tokyo
Tel. +81 42 725 81 51
Fax +81 42 728 81 19
e-mail: ljp@lem.com

Distributor

LEM International SA
8, Chemin des Aulx, P.O. Box 35
CH-1228 Plan-les-Ouates
Tel. +41 22 706 11 11, Fax +41 22 794 94 78
e-mail: Isa@lem.com; www.lem.com
Publication PTE111027/2

Romania
SYSCOM -18 Srl.
Calea Plevnei 139B Sector 6
RO-060011 Bucharest
Tel. +40 21 310 26 78
Fax +40 21 316 91 76
e-mail: george.barbalata@
syscom18.com
RussiaCentral Ofﬁce:
TVELEM
Str. Staritskoye shosse,15
170040 Tver / Russia
Tel./fax: + 7 4822 655672,73
e-mail: tvelem@lem.com
Scandinavia
Regus Tuborg Havn
Tuborg Boulevard 12, 3rd2900 Hellerup, Denmark
Tel. +45 88 24 5555
e-mail: kck@lem.com
Spain
LEM France Sarl
15, avenue Galois
F-92340 Bourg-la-Reine
Tel. +34 93 886 02 28
Fax +34 93 886 60 87
e-mail: slu@lem.com

BrazilAMDS4 Imp. Exp. e Com. deEquip. Elétricos Ltda.
Rua Dr. Ulhôa Cintra, 489,
Piso Superior, Centro 13800-061
Moji Mirim - São Paulo - Brazil
Tel. +55 19 3806 1950 / 8509
Fax +55 19 3806 8422
e-mail: jeduardo@amds4.com.br

China
LEM Electronics (China) Co., Ltd.
No. 28, Linhe Str., LInhe
Industrial Development Zone
Shunyi District, Beijing, China
Post code : 101300
Tel. +86 10 89 45 52 88
Fax +86 10 80 48 43 03+86 10 80 48 31 20
e-mail: bjl@lem.com

Portugal
QEnergia, Lda
Centro Empresarial S.
Sebastião
Rua de S. Sebastião Lt 11 n.º
10, Albarraque2635-448 Rio de Mouro
PortugalTel. +351 214 309 320
Fax. +351 214 309 299
e-mail: qenergia@qenergia.pt

LEM Japan K.K.
1-14-24-701 Marunouchi,
Naka-ku, Nagoya
460-0002 Japan
Tel. +81 52 203 8065
Fax +81 52 203 8091
e-mail: ljp@lem.com
Korea
S&H Trading#B1 15-02, Chungang Yutong,
1258, Gurobon-dong, Guro-gu,
Seoul, 152-721, Korea
Tel. +82 2 2686 83 46+82 2 2613 83 45
Fax. +82 2 2686 83 47
e-mail: snhlim@yahoo.co.kr
Young Woo Ind., Co.
#608 Penterium IT Tower,
282 Hakeui-ro, Dongan-gu,
Anyang-si, Gyeonggi-do
South Korea, 431-810
Tel. +82 31 266 8856
Fax +82 31 266 8857
e-mail: info@ygwoo.co.kr

Switzerland
SIMPEX Electronic AG
Binzackerstrasse 33
CH-8622 Wetzikon
Tel. +41 44 931 10 30
Fax +41 44 931 10 31
e-mail: contact@simpex.ch
LEM International SA
8, Chemin des Aulx
P.O. Box 35
CH-1228 Plan-les-Ouates
Tel. +41 22 706 11 11
Fax +41 22 794 94 78
e-mail: lsa@lem.com
TurkeyÖzdisan Electronik Pazarlama
DES Sanayi Sitesi,
104.Sok.A07 Blok N°:02
TR-34776 Y.Dudullu
Umraniye / Istanbul
Tel. +90 216 420 1882
Fax +90 216 466 3686
e-mail: ozdisan@ozdisan.com
Ukraine“SP DACPOL” Co Ltd.
Snovskaya str., 20
UA-02090, KIEV, UKRAINE
Tel. +380 44 501 93 44
Fax +380 44 502 64 87
e-mail: kiev@dacpol.com
United Kingdom and Eire
LEM UK Ltd
West Lancs
Investment Centre
Whitemoss Business Park
Skelmersdale, Lancs WN8 9TG
Tel. +44 1 942 388 440
Fax +44 1 942 388 441
e-mail: luk@lem.com

TaiwanPOWERTRONICS CO. LTD
The Tapei SUN-TECH
Technology Park
10th Floor, No. 205-2, Section 3,
Beixin Road, Xindian City,
Taipei County
23143, Taiwan, R. O. C.
Tel. +886 2 7741 7000
Fax +886 2 7741 7001
e-mail: sales@powertronics.com.tw
Tope Co., Ltd.
3F-4, 716 Chung Cheng road
Chung Ho City, Taipei Hsien,
Taiwan 235, R.O.C.
Tel. +886 2 8228 0658
Fax +886 2 8228 0659
e-mail: tope@ms1.hinet.net