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LEM launches AC/DC current transducers

Posted: 30 May 2006     Print Version  Bookmark and Share

Keywords:AHR  current transducer  LEM  Gina Roos 

LEM has launched the AHR series of AC and DC current transducers which offer precise measurement of nominal currents up to 2,000A true rms, which extends the existing family that ranges from 100A to 1,000A. They also offer a large sensing aperture for non-contact measurement.

These AHR series split-core transducers combine Hall-effect technology and signal conditioning in a 174-by-86-by-54.1mm package, which is about a 50 per cent savings in size when compared to existing transformers. The transducers provide an absolute accuracy better than one per cent of the nominal current over a broad range of inputs, a wide bandwidth from DC to 6kHz, and true rms computation for non-linear loads or "noisy" environments. The operating temperature range is -400C to 700C.

Targeting industrial system designers, system integrators and automation distributors, key applications are expected to be in the monitoring of large SCR or switch-mode rectifiers, back-up batteries, main AC power supplies and large AC or DC motors.

Devices in the AHR series, which combine a Hall-effect sensor and true rms transducer in a single case, have been designed to measure DC signals as well as distorted current waveforms such as variable frequency drive outputs. They offer a choice of primary current measurement ranges from 500A to 2,000A, a choice of standard output types (4mA to 20mA, 0-5V or 0-10V), and a wide power supply range (20Vdc to 50Vdc).

The price range for the AHR series is from Rs.6,640.19 ($147.20) to Rs.7,380 ($163.60) for 100 pieces. Delivery is within 11 weeks.

- Gina Roos

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