Clamp-On Open-Loop DC MicroAmmeter & Insulation Fault Detector
The open-loop high sensitivity clamp-on Microammeters can measure direct currents down to 1 uA only. It can be used to indirectly measure and track leakage current through a fault in the insulation system of electrical machines. Measurement ranges 10mA to 10A.
The MicroAmmeter is a clamp-on toroidal ferro-magnetic core with an air gap, in which the AMR sensors of a differential Hall magnetometer is inserted.
The Insulation Fault Detector (IDL) includes two MicroAmmeters, signal conditioning units, a demagnetization circuit for the ferro-magnetic core and a PC software for data acquisition and visualization.