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Multi-function household electrical appliances protection ci

2016-09-23 15:54  
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Multi-function household electrical appliances protection circuit diagram
The circuit is composed of DC circuit, delay circuit, overvoltage and undervoltage protection circuit etc. ICl integrated circuit LM7812 outputs +12 V voltage. Undervoltage and overvoltage sample protection circuit is composed of sampling R2, potentiometer RP2, the regulator DWl, VTl and Rl, RPl, DW2, VT2, VD5, VD6, VT3 and control relay J1. In the figure, VT1 ~ VT3 use 3DG4, thyristor VS uses 6A/400V, VD1 ~ VD7 use 1N4004, relay J1 uses JRC-1M 12V.