Crowbar Protection Circuit. A crowbar circuit is used to protect circuit or equipment under the fault condition. In this case 15v.
A crowbar circuit is different from other safety or latching circuits for example a clamp in pulling. A crowbar circuit is a simple electrical circuit that prevents damage to the circuits load of the power supply in the event of an overvoltage of the power supply. Crowbar circuit is a little electronics circuit used for preventing an overvoltage condition of a power supply unit psu from damaging the circuits attached to its output.
It operates by putting a short circuit low resistance path across the output of the psu.
It protects the load against overvoltages. A crowbar circuit shown in figure 1 can protect your device from overvoltage. It is placed across the power supply output terminals. A crowbar doesn t return to the normal operation when overvoltage condition is removed.
