Overvoltage Protection Circuit Circuit

  
When testing a circuit, a source of voltage that is variable and has overvoltage shutdown is veiy useful. In this circuit, Rl is adjusted to 1 to 2 V below the eventual shutdown threshold. R2 sets the trip voltage. When this voltage is reached, the circuit shuts the voltage to the circuit under test down.

To reset, reduce Rl belowtrip threshold and depress reset switch SI.




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