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Mini transducer measures currents up to 100A RMS

Posted: 21 Jun 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Gina Roos? LEM? transducer? LAX 100-NP?

LEM has introduced a miniature PCB-mounted transducer for the measurement of currents up to 100A RMS. The LAX 100-NP is configurable for different current ranges and can perform multiple measurements with a single reference to reduce cost.

The LAX 100-NP closed loop Hall-effect sensor can be configured via the primary connections on the PCB to measure currents up to 16.67-, 25-, 33.33-, 50- or 100A RMS. In systems where different currents have to be measured, this can be achieved with a number of LAX 100-NP devices but with only a single reference, which helps reduce costs.

Measuring 16.35mm high, the LAX 100-NP features a wide maximum bandwidth of DC to 300kHz and an overall accuracy of better than 0.91 percent at a primary nominal RMS current of 100A. Typical linearity error is 0.06 percent at 100A and temperature drift is 200A max from 0 to 70C. In addition, the closed loop Hall-effect technology results in no insertion losses and a fast response time (few ms).

The LAX 100-NP is CE marked, and conforms to the EN50178 standard. It has a five-year warranty. It is suitable for industrial applications such as variable speed drives, UPS, SMPS, air conditioning and home appliances. The company said the design simplifies integration with power modules in drive and inverter designs.

The LAX 100-NP is priced at $11.60 for 1,000 units. Delivery is 16 weeks.

- Gina Roos

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