HAH1BVW Datasheet | LEM

Features - - Ratiometric transducer - - Open Loop transducer using the Hall effect - - Low voltage application - - Unipolar +5 V DC power supply - - Primary current measuring range ±1100 A - - Maximum RMS primary admissible current: defined by busbar to have T < +150 °C - - Operating temperature range: - 40 °C < T < 125 °C - - Output voltage: full ratio-metric (in sensitivity and offset). Advantages - - Excellent accuracy - - Very good linearity - - Very low thermal offset drift - - Very low thermal sensitivity drift - - Galvanic separation - - Non intrusive solution. Automotive application - - Battery Management. Principle of HAH1BVW Family The open loop transducers uses a Hall effect integrated circuit. The magnetic flux density B, contributing to the rise of the Hall voltage, is generated by the primary current IP to be measured. The current to be measured IP is supplied by a current source i.e. battery or generator (Figure 1). Within the linear region of the hysteresis cycle, B is proportional to: B (IP) = a × IP The Hall voltage is thus expressed by: VH = (c H / d) × IH × a × IP Except for IP, all terms of this equation are constant. Therefore: VH = b × IP a constant b constant c H Hall coefficient d thickness of the Hall plate IH current across the Hall plates The measurement signal VH amplified to supply the user output voltage or current. Fig. 1: Principle of the open loop transducer. N° 97.K6.61.011.0 23November2017/version 1 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice Page 1/6 .lem. Dimensions (in mm) IP IP HAH1BVW S/11 2D matrix bar code area Mechanical characteristics - - Plastic case PBT...