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Current transducers for unipolar +5V operation
A
LEM UK product story
Edited by the Manufacturingtalk editorial team
Jan 26, 2005
LEM has introduced a miniature PCB-mounting current transducers for unipolar +5V operation that is designed to operate from a single +5V power supply.
LEM has introduced a miniature PCB-mounting current transducers for unipolar +5V operation with open-loop technology combined with ASIC, access to the internal voltage reference and small size/low cost for PCB mounting.
With multi-range and five-year warranty, LEM has added the HXS series to its range of current transducer families designed to operate from a single +5V power supply.
The new PCB-mounting units measure only 18.5 x 16.5 x 10 mm and integrates a multi-range primary conductor.
The pinout on the primary conductor allows the HXS 20-NP to be configured as a 5, 10 or 20 ARMS nominal model and the HXS 50-NP to be configured as a 12.5, 25 or 50 ARMS nominal model, with a measuring span of up to +/-3 x IPN.
The same pinout is used for both in order to be able to use the same model for a complete range of drivesThat use the same control PCB.
The internal reference voltage (2.5V) is provided on a separate pin or can be replaced by an external reference (between 2 and 2.8V) for reference thermal drift cancellation.
with a fixed gain and offset the output can be measured precisely to +/- 0.625V at IPN when the reference is used.
A unique LEM ASIC designed for use with Open-loop Hall effect technology has been incorporated to provide performance improvements, including better offset and gain drifts and linearity, in addition to an extended operating temperature range (-40 to +85C and even +105C with SP2 models) compared to traditional discrete technology.
In a three-phase system, a special model (HXS 20-NP/SP3) configured for differential measurement can recreate the third phase current from the other two phase currents.
In addition, the HXS 20-NP/SP30 is available for applications when heating due to frequency occurs.
The transducers are CE marked, conform to the EN 50178 standard and are recognised for industrial applications.
LEM Components offers a five-year warranty for each transducer.
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