AGT-FD Series ground fault sensors detect faults to earth from 0 mA to 100 mA and produce an output signal of 0–10 VDC in proportion to the amount of current passing to ground.  The output is equal to the RMS value of the earth leakage. The AGT-FD can also be used to measure and monitor any low value AC circuit current by passing just one of the conductors through the sensing window. 

Ground Fault Applications Current Leakage 

• Monitor residual (earth leakage) current by passing all of the current carrying conductors through the sensing aperture. Very Light Loads 

• Monitor circuits of varying frequencies or distorted wave shapes, but very low current usage.