power failure protection circuit

Abstract

The invention discloses a power outage protection circuit. The power outage protection circuit includes a first time delay module, a second time delay module, a switching circuit and a load block module; the first end of the first time delay module is connected with the first end of the switching circuit; the second end of the switching circuit is connected with the first end of the second time delay module; the third end of the switching circuit is connected with the first end of the load block module; and the second time delay module is connected with the second end of the load block module. According to the power outage protection circuit of the invention, when power supply is turned off after power outage, switching on or switching off is carried out through the switching circuit, so that the first time delay module, the second time delay module and the load block module work together to prolong the power-on time of a load, namely, after current in the circuit is stable, the load is electrified, and therefore, the load can be protected from being damaged due to excessively high current.

Description

technical field [0001] The invention relates to the technical field of electrical switches, in particular to a power-off protection circuit. Background technique [0002] As we all know, the use of various electrical equipment is inseparable from the power supply. However, when the power grid suddenly encounters a power outage and the power supply is restored again, the peak value of the instantaneous current when the power is turned on is very large, and the electrical equipment will be subjected to a certain current impact, which will cause the aging of the internal components and affect the life of the components, and even directly burn out the components; especially It is even more harmful to household appliances such as refrigerators, television sets and computers, so that people's property is caused great losses. Contents of the invention [0003] In view of this, the purpose of the present invention is to provide a power failure protection circuit capable of delayi...

AI Technical Summary

Problems solved by technology

However, when the power grid suddenly encounters a power outage and the power supply is restored again, the peak value of the instantaneous current when the power is turned on is very large, and the electrical equipment will be subjected to a certain current impact, which will cause the aging of the internal components and affect the life of the components, and even directly burn out the components; especially It is even more harmful to household appliances such as refrigerators, televisions, and computers, so that it causes great losses to people's property.

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