Undervoltage protector with automatic identification of grid voltage

Abstract

The invention relates to an overvoltage and undervoltage protector with automatic identification of grid voltage. The overvoltage and undervoltage protection circuit of the overvoltage and undervoltage protector with automatic identification of the network voltage comprises a rectifying and stabilizing voltage power supply unit, a micro-processing unit, a voltage acquisition unit and an output driving and amplifying unit; the overvoltage and undervoltage protection circuit comprises a rectifying and stabilizing voltage power supply unit, a micro-processing unit, a voltage acquisition unit andan output driving and amplifying unit. The micro-processing unit is composed of a data processing system composed of a micro-single chip microcomputer and peripheral components, and is provided with avoltage specification threshold storage unit, a plurality of over-voltage preset value storage units and comparators adapted to market demand. The microprocessor-based single-control comparator compares the real-time grid voltage collected by the voltage acquisition unit with a voltage specification threshold to determine a grid voltage specification, According to this, the corresponding undervoltage preset value is automatically selected for detection and comparison, and according to the comparison result, the output drive amplification unit is controlled, thereby controlling the voltage output of the voltage protector, so the purpose of automatically identifying the network voltage for undervoltage protection is achieved.

Description

technical field [0001] The invention relates to a voltage protector, in particular to an overvoltage and undervoltage protector with automatic grid voltage identification. Background technique [0002] At present, the existing overvoltage and undervoltage protectors in the market are all aimed at a single voltage specification (such as 120V or 220V), and the voltage specification is fixed in a single form, because the grid voltage of different countries and regions will be different, such as the United States. The power grid is 110V, and some countries even have two voltage specifications at the same time, so the use of existing overvoltage and undervoltage protectors in these countries and regions is limited, and products with corresponding voltage specifications must be selected for use. Both manufacturers and users have brought cumbersome and inconvenient; in addition, in order to meet market demand, manufacturers need to develop products with different voltage specificat...

AI Technical Summary

Problems solved by technology

[0002] At present, the existing overvoltage and undervoltage protectors in the market are all aimed at a single voltage specification (such as 120V or 220V), and the voltage specification is fixed in a single form, because the grid voltage of different countries and regions will be different, such as the United States. The power grid is 110V, and some countries even have two voltage specifications at the same time, so the use of existing overvoltage and undervoltage protectors in these countries and regions is limited, and products with corresponding voltage specifications must be selected for use. Both manufacturers and users have brought cumbersome and inconvenient; in addition, in order to meet market demand, manufacturers need to develop products with different voltage specifications at the same time, which increases production investment and increases the burden on enterprises. Overvoltage and undervoltage protector with automatic identification of grid voltage

Images