Abstract: A remote controlled interactive power switch includes a first coil for controlling a switch contact to be closed by suction, a self-locked device for locking the switch contact to keep conducting state by mechanical self-locking, a second coil for controlling the self-locked device to be disengaged and a power supply control circuit. The power supply control circuit is connected with an interactive control module which includes a remote controlled interactive connecting unit, an interactive monitoring unit, a switch-on signal producing unit and a turn-off signal producing unit. The present invention can simplify the complex control circuit and thoroughly resolve the technical requirements of the power switch with high make-break capacity. Additionally, the present invention produces consumption only when starting the on-off switch, and after starting and under normal operation, the pulse magnetic energy coil keeps an inactivity state, no consumption, no heat and no noise.

Abstract: A remote controlled interactive power switch includes a first coil for controlling a switch contact to be closed by suction, a self-locked device for locking the switch contact to keep conducting state by mechanical self-locking, a second coil for controlling the self-locked device to be disengaged and a power supply control circuit. The power supply control circuit is connected with an interactive control module which includes a remote controlled interactive connecting unit, an interactive monitoring unit, a switch-on signal producing unit and a turn-off signal producing unit. The present invention can simplify the complex control circuit and thoroughly resolve the technical requirements of the power switch with high make-break capacity. Additionally, the present invention produces consumption only when starting the on-off switch, and after starting and under normal operation, the pulse magnetic energy coil keeps an inactivity state, no consumption, no heat and no noise.

Abstract: A low arc AC contactor comprises an on/off mechanism electromagnetic-controlled contact, a pulse power source generating circuit, a low arc trigger generating circuit, and a multifunctional fault-detecting circuit. The contactor converts an instantaneous strong current into strong pulse magnetic field energy to actuate contacts of mechanical portion of the contactor, so that the power source load is on or off. Each of the actuating process will be controlled by the electric circuit to perform at the lowest potential of AC voltage for reducing arc's destructive power. Moreover, the contactor uses photoelectric coupling circuits, in which it can be controlled by external low voltage signal commands, as well as providing protection from overload, phase loss, short circuit, and leakage current.

Abstract: A low arc AC contactor comprises an on/off mechanism electromagnetic-controlled contact, a pulse power source generating circuit, a low arc trigger generating circuit, and a multifunctional fault-detecting circuit. The contactor converts an instantaneous strong current into strong pulse magnetic field energy to actuate contacts of mechanical portion of the contactor, so that the power source load is on or off. Each of the actuating process will be controlled by the electric circuit to perform at the lowest potential of AC voltage for reducing arc's destructive power. Moreover, the contactor uses photoelectric coupling circuits, in which it can be controlled by external low voltage signal commands, as well as providing protection from overload, phase loss, short circuit, and leakage current.

Abstract: A circuit breaker for a power/load circuit including a three-phase AC power supply and a load connected to the power supply by three live power lines. The circuit breaker includes a tripping circuit including switches connected in series with respective power lines facing the power supply, a transformer having at least three balanced primary windings connected in series to respective power lines and a secondary winding, and a voltage comparator connected to the secondary winding for comparing a voltage induced in the transformer with a reference voltage and, in the event of a leakage fault, providing a tripping signal to the tripping circuit to open the switches.