The overcurrent protection elements used in electronic equipment mainly include ordinary fuses, hot fuses, self-recovery fuses and fuse resistors (protection resistors), which are generally connected to the circuit, in the circuit when there is an abnormal phenomenon such as current or overheating, will immediately cut off the circuit and play a protective role to prevent further expansion of the fault. Overvolted protection devices mainly have voltage-sensitive, overvolted protection diodes and so on, they are generally in the circuit in a union.
When a fault occurs in a low-voltage power supply line, such as overload or short circuit, the protective electrical components in the low-voltage power supply line (such as low-voltage circuit breakers, fuses, heat relays, etc.) will act, so that the circuit is cut off to protect the power supply line, power supply equipment and electrical equipment from overload or short circuit and other faults burned.
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