This circuit interrupts the power supply when grounding is missing. The circuit is from an old documentation (from the 80's) using current transformers and other components of the time.
March 2017 - Mouser Electronics announces the availability of MAX17523, an overcurrent and...
This very high input impedance circuit is suggested by Texas Instruments. The circuit can be...
This 741 operational circuit can be found with slight variations in this section and on this site....