High Voltage Cutoff Circuit Diagram

The following circuit utilizes a transformer for powering the circuit.

High voltage cutoff circuit diagram.

Automatic high voltage and low voltage cutoff circuit12. Plzz tell me the high low voltage cutoff with delay and alarm with some modification and advancement in circuit diagram. Juliet 8 years ago plzzzzz tell me the size of the auto transformer to be used and i didnt get what is no n where exactly the appliance to be checked should be kept kind request to you to send me all the details of working. When the input voltage goes high then the relay will be activated and also when the input voltage is below then required level then relay activated.

As a result transistor q1 is in on and transistor q2 gets switched off. The ac mains high and low voltage cut off circuit explained in this article is very easy to build and yet very reliable and accurate. This voltage sensor circuit can be used to protects any appliance to voltage fluctuation. If you use this circuit for autocut on over 6v then use 6 v relay and circuit need 6v.

R1 r2 r3 r4 r5 r6 r7 r8 4k7. Before using this circuit set the preset and check the relay or output to at which input voltage level relay gets activated. So it helps to protect the circuit damage by the high voltage. Over voltage and under voltage protection circuit for high and low voltage cutoff.