The automatic return mechanism of the electric leakage display in the earth leakage breaker

摘要

(57) Abstract (Modified) Objective Structure being simple, the attachment being easy, at the same time small sizeThe automatic return mechanism of the electric leakage display in the earth leakage breaker stoppingIt offers. Constitution When electric leakage is generated in the electric circuit, null of the electric leakage detector 2Phase converter ZCT to output voltage, the one for electric leakage detection IC 6Turn, it is input into the 7th pin. And the one for electric leakage detection IC 3Electric potential of 1 impulses to be generated in the turn pin, thyristor SCR1Turns on, electric current flows to magnetic coil MG and is energizedru. Contact breaker points 3 of the electric circuit are cut off attendant upon that. Simultaneously radiationDiode LED lights up. It cut off in out posthumous of electric leakageWhen the electric circuit is reentered, photo coupler 6 to turn on, in thisAccompanying 1st transistor TR1 to turn off, condenser CBy the differentiating circuit and this differentiating circuit of 1 and resistance R1 1 pasThe 2nd transistor TR2 which between rusu is turned on and, this 2ndWith on of transistor TR2 thyristor SCR2Turns off. Because of this luminous daio which is the electric leakage displaydo LED goes out, returns automatically.