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.
This circuit consists of a touch switch with optical isolation, using CMOS integrated circuits. The...
The operational ones used in this circuit are not common today, but the circuit can be implemented with...
We found this circuit in an old American publication. The transistors can be BC558 and diode 1N34....