Position: Index > Protect Circuit >

Refrigerator automatic protector

2016-09-10 16:53  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.


Refrigerator automatic protector
Refrigerator automatic protector
BT33 forms a delay circuit. When the power is turned on, the relay J1 does not work, contact J1-2 disconnects for five minutes, due to the charging voltage rise of the capacitor C1, BT33 gets conduction, relay J1 pulls, J1 -2 contact gets closure, then the refrigerator gets power, which is protected by J1-1 normally open contact. Under the case with normal voltage, D2, BG2 get conduction, D3, and D4, and BG3 are cutoff, relay J2 does not work.