Found elsewhere in this section, but from other sources, this circuit is from Motorola documentation. The circuit uses a triac of the time and a tripping transformer. The circuit is for 110 V network.
The circuit shown is from an old European publication. In it we have the way to activate a relay...
We found this circuit in a European publication from the 1990s. Transistors are still common types...
This circuit was found in an American documentation and can be added to common amplifiers of any...