The power circuit principle is shown in the figure. When the switch S1 is closed, the current is phase-shifted by the load and the network composed of R5, R2 and Cl, and is turned on by the bidirectional trigger diode VD3 and the trigger thyristor SCR. Since the resistance of the R2 resistor is large, the conduction angle of the thyristor SCR is small. At this point, a lower voltage is available at the output (can be designed to zero for delay on).
SCR can choose 6A/600V, trigger current less than 10mA thyristor; VT1 selects general FET, such as 3DJ6 or 3DJ7; VT2 selects 3CG21 with β≥100; VT3 selects high gain triode with β≥500, such as 9014; VD1, VD7 select the *** rate diode with voltage greater than 400V, such as 1N4007; VD5, VD6 power is not less than lW; R14 power is not less than 2W; R1, R5 power is not less than 1W; R4 power is not less than l/2W; other resistors use 1/8W of power. If long-term timing is required, C3 should be selected with a small leakage capacitor. There are no special requirements for other components. The photocoupler in the regulator has no finished product supply, and can be self-made, that is, a photoresistor with a dark resistance of 10 MΩ, a light resistance of 10 kΩ, a power of 200 mW, and a light-emitting diode with high brightness are packaged together, and can be shielded from the outside.
Residual Current Circuit Breaker With Over Load Protection
TWO FUNCTION : MCB AND RCCB FUNCTIONS
leakage breaker is suitable for the leakage protection of the line of AC 50/60Hz, rated voltage single phase 240V, rated current up to 63A. When there is human electricity shock or if the leakage current of the line exceeds the prescribed value, it will automatically cut off the power within 0.1s to protect human safety and prevent the accident due to the current leakage.
leakage breaker can protect against overload and short-circuit. It can be used to protect the line from being overloaded and short-circuited as wellas infrequent changeover of the line in normal situation. It complies with standard of IEC/EN61009-1 and GB16917.1.
RCBO,ELCB,Leakage Circuit Breaker,Residual Current Circuit Breaker,Residual Current Circuit Breaker with Over Load Protection 1p,Residual Current Circuit Breaker with Over Load Protection 2p
Wenzhou Korlen Electric Appliances Co., Ltd. , https://www.korlenelectric.com