A controllable electric current switchgear includes a bistable relay including separable electrical contacts and an excitation coil for switching the contacts between open and closed states when the coil receives an amount of energy that is higher than a predefined excitation energy threshold with an electrical power that is higher than a predefined power threshold; and a control circuit including a power stage and a logic stage for triggering the switching of the relay. The power stage includes a power converter, a first set of capacitors connected at the input of the converter and a second set of capacitors connected at the output of the converter, the nominal power of the converter being strictly lower than the power threshold, the sets of capacitors being capable of storing an amount of energy that is higher than or equal to 50% of the excitation energy threshold.

A latching relay drive circuit includes a transistor that goes off when an operation switch is open, and a transistor connected in parallel to a capacitor and an operation coil. The transistor comes on when the transistor goes off to allow a reset current to flow into the operation coil. Accordingly, an enough reset current can be supplied, even if a power supply is shut off due to a power failure, to securely recover a single winding latching relay.

A cockpit switch device can include a pushbutton switch, a bi-stable relay and a toggle component. The pushbutton switch can be configured to be manually actuated by a user into a command state. The bi-stable relay can be controlled by input commands from the pushbutton switch and input commands from a processor, and can be configured to control operation of one or more systems of an aircraft. The toggle component can be connected to the pushbutton switch, the processor and the bi-stable relay. The toggle component can receive an input command signal from at least one of the pushbutton switch or the processor, and cause a state of the bi-stable relay to be flipped responsive to the input command signal from the at least one of the pushbutton switch or the processor.

The invention comprises a method and a circuit design to control a bi-stable contactor in such a way that contactor coils can be energized in the event of sudden and unexpected loss of battery power. The invention also includes a component redundancy scheme designed to survive any single component failure SHORT or OPEN as required by industry safety standards UL1973 and UL991.

The present invention relates to an electrical appliance comprising an electronic control unit (6) and a power circuit (7) supplying power to said electronic control unit (6), the power circuit (7) comprising a soft on/off switch (1) for turning on and off the electrical appliance, the soft on/off switch (1) being connected electrically in parallel with a relay (2) and a rectifier (3). The power circuit (7) further comprises an electrical node connecting the soft on/off switch (1) and the rectifier (3) to a button sensing circuit (4) and to an AC/DC converter (5) together.

The present disclosure relates to a power grid separating apparatus using a latch relay and a method thereof. An exemplary embodiment of the present disclosure provides a power net separating apparatus including: a switch configured to have a first end connected to a first power source and a second end connected to a second power source; a latch relay coil configured to control on and off of the switch; a first signal terminal connected to the first power source; a second signal terminal to which a connection signal for opening the switch is applied; a third signal terminal configured to serve as a power terminal of the latch relay coil; a fourth signal terminal to which a blocking signal for closing the switch is applied; and a fifth signal terminal connected to the second power source.

A latching relay includes a first coil, a second coil and a common plunger operatively connected between the first and second coils such that activation of the first coil moves the plunger to a first position and activation of the second coil moves the plunger to a second position. The latching relay also includes a limit switch having a common contact and first and second coil contacts. A position of the common contact is alternately switched between electrical connection to either the first or second coil contact based on a position of the plunger. The first and second coil contacts are electrically connected to the first and second coils, respectively such that when electrical power is applied to the common contact, the electrical power is alternately applied to either the first coil or the second coil depending on the position of the common contact.

An actuating device for a vacuum switching tube has a connecting element which can be connected to an electric contact of the vacuum switching tube, an electromagnetic actuating device for displacing the connecting element between a first and a second position, and a retaining yoke, relative to which the connecting element can be displaced and has a first magnetic element. The first magnetic element generates a first and a second magnetic circuit in the retaining yoke. The actuating device further has a ferromagnetic retaining anchor, which is arranged on the connecting element. The retaining anchor is located in the first position of the connecting element in the first magnetic circuit and in the second position of the connecting element in the second magnetic circuit. The connecting element is held in the first and in the second position by a respective magnetic force between the retaining yoke and the retaining anchor.

A step-by-step electric relay structure of a bistable type, comprising a mechanical part and an electric part, the mechanical part comprising push-button means to be operated by a user and the electric part comprising coil means, capacitor means, resistor means and diode means operatively interconnected to one another, the coil means comprising either two coils coupled in parallel to one another or a single coil polarized or biased with two polarities, thereby, as the push-button means are operated by the user to provide a switching or exchanging of at least a contact of the relay structure, either one of the two coils is shorted or the two polarities of the single coil are mutually reversed, thereby providing the electric relay structure with a logic SET function and a logic RESET function.

The present invention provides a wireless power-supply control assembly 100 for wirelessly controlling a boat's main power supply. The assembly 100 comprises an enclosure assembly 110, wherein a latching relay 600 and a wireless-receiver relay 300 are mounted. The wireless receiver relay 300 is controlled by commands from a wireless transmitter and causes the latching relay 600 to connect or disconnect the boat's main power. In other embodiments, an ignition-sense relay 400 is also mounted within the enclosure and disconnects power to the wireless-receiver relay 300 when the boats ignition is on. In yet another embodiment, a manual override switch 200 is provided within the enclosure for bypassing the latching relay 600 and manually connecting the boat's power.