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LEM - current transducer

Zero Flux Precision Current Transducers

The Ultrastab range of high performance current transducer allows the electronic measurement of DC, AC and pulsed currents with galvanic isolation between the primary (high power) circuit and the secondary circuit with <5ppm linearity and accuracy.

IT current transducers are high accuracy, large bandwidth transducers which do not use Hall generators. The magnetic flux created by the primary current is compensated by a secondary current. The zero-flux detector is a symmetry detector using two wounded cores connected to a square-wave generator. The secondary compensating current is an exact representation of the primary current.

The tables below describe the standard products, if you would like to discuss your requirement please call us on 01793 784389 and talk to a member of our technical sales team.

IT Series

  Primary Continuous Direct Current Range (A) Primary Nominal RMS Current (A) Measuring Resistance Range (Ohms) Conversion Ratio Overload Capability, 100ms Pulse (A) Accuracy (%) Datasheet
IT 60-S +/- 60 42 0 – 70 1 : 6000 +/- 300 0.027 IT 60-S
IT 65-S +/- 60 60 0 – 50 1 : 6000 +/- 300 0.03 IT 65-S
IT 200-S +/- 200 141 0 – 30 1 : 1000 +/- 1000 0.008 IT 200-S
IT 205-S +/- 200 200 0 – 20 1 : 1000 +/- 1000 0.01 IT 205-S
IT 400-S +/- 400 282 0 – 2.5 1 : 2000 +/- 2000 0.004 IT 400-S
IT 405-S +/- 400 400 0 – 15 1 : 1500 +/- 2000 0.005 IT 405-S
IT 605-S +/- 600 600 0 – 5 1 : 1500 +/- 3000 0.003 IT 605-S
IT 700-S +/- 700 495 0 – 2.5 1 : 1750 +/- 3500 0.005 IT 700-S
IT 700-SB +/- 700 495 0 – 2.5 1 : 1750 +/- 3500 0.014 IT 700-SB
IT 1000-S +/- 1000 707 0 – 3 1 : 1000 +/- 4000 0.005 IT 1000-S

ITN Series

  Primary Continuous Direct Current Range (A) Primary Nominal RMS Current (A) Measuring Resistance Range (Ohms) Conversion Ratio Overload Capability, 100ms Pulse (A) Accuracy (%) Datasheet
ITN 12-P +/- 12.5 8.8 0 – 31 1 : 250 +/- 62.5 0.05 ITN 12-P
ITN 600-S +/- 600 424 0 – 5 1 : 1500 +/- 3000 0.002 ITN 600-S
ITN 900-S +/- 900 636 2.5 – 5 1 : 1500 +/- 4500 0.001 ITN 900-S
ITN 1000-S +/- 1000 707 2.5 – 5 1 : 1500 +/- 4500 0.001 ITN 1000-S

ITL Series

  Primary Continuous Direct Current Range (A) Primary Nominal RMS Current (A) Measuring Resistance Range (Ohms) Conversion Ratio Overload Capability, 100ms Pulse (A) Accuracy (%) Datasheet
ITL 900-T +/- 900 400 May-50 1 : 1500 0.009 ITL 900-T
ITL 4000-S +/- 12000 4000 0 – 1 1 : 2500 0.06 ITL 4000-S

ITC Series

  Primary Continuous Direct Current Range (A) Primary Nominal RMS Current (A) Measuring Resistance Range (Ohms) Conversion Ratio Overload Capability, 100ms Pulse (A) Accuracy (%) Datasheet
ITC 2000-S/SP1 +/- 3000 2000 0 – 2 1 : 2500 0.05 ITC 2000-S/SP1
ITC 2000-S/SP2 +/- 3000 2000 0 – 2 1 : 2500 0.05 ITC 2000-S/SP2
ITC 4000 +/- 6000 4000 0 – 1 1 : 2500 0.05 ITC 4000-S

Useful Documents

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IT Series Catalogue

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IT/ITN Power Supply Datasheet

 

 

 

 

 

 

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Telephone +44 (0)1793 784389 or email: sales@ppm.co.uk