Devices in the AHR series have been designed to measure DC signals as well as distorted current waveforms such as variable frequency drive (VFD) outputs. They offer a choice of primary current measurement ranges from 500A to 2000A, a choice of standard output types (4-20mA, 0-5V or 0-10V), a wide power supply range (20 to 50 VDC) and large sensing apertures for non-contact measurement.
The new transducers provide an absolute accuracy better than 1 percent of the nominal current over a broad range of inputs. This, coupled with a wide bandwidth from DC to 6kHz, an operating range of -40 to +70°C and true RMS computation for non-linear loads or “noisy” environments, makes them an excellent choice for industrial system designers, system integrators and automation distributors looking for accurate and cost-effective AC or DC current transducers. As with all other LEM products, the AHR series products benefit from the company’s proven high-quality approach to manufacturing and are backed by a five-year guarantee. Principal applications are expected to be in the monitoring of large SCR or switch-mode rectifiers, backup batteries, main AC power supplies and large AC or DC motors.
