LEM has added the HASS series to its range of panel-mounted current transducer families designed to operate from a single +5 V power supply. The seven units in the series offer maximum current measurements from 50 to 600 A rms, and share the same mechanical design, measuring 40 x 30 x 32,5 mm with a 20,4 x 10,4 mm aperture for the primary conductor. The transducers weigh only 55 g, an important feature for panel-mounting applications.
A unique ASIC designed for use with open-loop Hall-effect technology has been used to provide performance improvements, including better offset and gain drifts and improved linearity, in addition to an extended operating temperature range
(-40 to +85°C) compared to traditional discrete technology. The transducers can measure DC, AC and pulse currents, with low power consumption, while providing galvanic isolation between the primary and output circuits.
The internal reference voltage (2,5 V) is provided on a separate contact (of the Molex 5045-04A connector) or can be forced by an external reference (between 2 and 2,8 V) for reference thermal drift cancellation. Gain and offset are fixed and set so that, at Ipn, the output voltage is equal to Ref in or Ref out ±0,625 V. These transducers are CE approved, conform to the EN 50178 standard (recognised for industrial applications) and are provided with a five-year warranty.
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