Low High Voltage Cutoff Circuit Diagram

The main building block of this circuit is timer ic 555 voltage regulator ic and few other active as well as passive electronic components like transistor resistor capacitor etc.

Low high voltage cutoff circuit diagram.

As a result transistor q1 is in on and transistor q2 gets switched off. As shown in the circuit diagram a couple of transistor stages are integrated together along with an output relay which is able to perform the function of super safe voltage guard equipment. High voltage low voltage cut off circuit. High and low voltage cutoff with delay and alarm principle.

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. So it helps to protect the circuit damage by the high voltage. Low voltage cut off op amp figure 2 shows the use of very common and easily available op amp 741 as a comparator. The circuit utilizes a single ic lm 324 for the necessary detection and instantly switches the relevant relays so that the connected loads are isolated from the dangerous inputs.

Before using this circuit set the preset and check the relay or output to at which input voltage level relay gets activated. As explained above the transistors sense the presence of the dangerous voltage levels respectively and activate. This voltage sensor circuit can be used to protects any appliance to voltage fluctuation. Circuit description of high low voltage cutout circuit the circuit of high low voltage cutout is shown in figure 1.

Plzz tell me the high low voltage cutoff with delay and alarm with some modification and advancement in circuit diagram. When supply voltage is high the dc voltage at the cathode of zener diode d4 becomes greater than 5 6v. Over voltage and under voltage protection circuit for high and low voltage cutoff. The op amp is available in to 5 and dip type packing.

Automatic high voltage and low voltage cutoff circuit12. An ideal low battery cut off circuit should have zero on resistance zero power consumption when the switch is off and zero power. If you use this circuit for autocut on over 6v then use 6 v relay and circuit need 6v.