Abstract: An electronic power-saving power control circuit for connection between a single-phase power supply and a lighting fixture to control the output of power supply to the lighting fixture is disclosed to include a CPU (central processing unit), a power voltage detector, a silicon controlled semiconductor circuit, a current phase detector, a trigger circuit, a resistor, a current detector, and a DC power supply circuit. The electronic power-saving power control circuit saves the consumption of power supply by dropping the voltage without affecting normal working of the lighting fixture at the load and, achieves an overcurrent protection.

Abstract: A multi-functional motor control device is disclosed. A control circuit set are connected between three input currents of different phases and a motor. The control circuit set includes a main control circuit for controlling phase sequences, a control CUP control circuit, a display control circuit, a function key control circuit, a current detection circuit, a silicon control trigger circuit, an input voltage detection circuit. By above components, the phase difference of voltage of power source and feedback current can be determined so as to know the message of a load to control the output of a silicon controlled SCR circuit and thus to control the power saving of the variation of load. Moreover, the message of power voltage can provide the protection of over voltage and low voltage. The detection of current provides the protection of over current or unbalance of currents of different phases and being lack of phase.

Abstract: An electronic power-saving power control circuit for connection between a single-phase power supply and a lighting fixture to control the output of power supply to the lighting fixture is disclosed to include a CPU (central processing unit), a power voltage detector, a silicon controlled semiconductor circuit, a current phase detector, a trigger circuit, a resistor, a current detector, and a DC power supply circuit. The electronic power-saving power control circuit saves the consumption of power supply by dropping the voltage without affecting normal working of the lighting fixture at the load and, achieves an overcurrent protection.