Provided herein are methods for an improved bi-stable relay. In some embodiments, a method may include providing a core assembly within a housing, the core assembly comprising a plunger extending through a coil support structure. The method may further include winding a first coil and a second coil about a central section of the coil support structure, providing a first magnet and a first ferromagnetic plate at a first end of the coil support structure, and providing a second magnet and a second ferromagnetic plate at a second end of the coil support structure. In some embodiments, the method may further include activating the first coil or the second coil to move the plunger between a first position and a second position, wherein in the first position a circuit formed by a set of contacts is closed, and wherein in the second position the circuit is open.

The disclosure relates to an electromagnetic relay module, comprising a first circuit branch comprising a first capacitor and a first relay connected in series with the first capacitor, a second circuit branch comprising a second capacitor and a second relay connected in series with the second capacitor, a switching element which is arranged between the first circuit branch and the second circuit branch and comprises a first switching state and a second switching state. In the first switching state of the switching element the first circuit branch and the second circuit branch are arranged in a parallel connection. In the second switching state of the switching element the first relay and the second relay are arranged in a series connection. The switching element is configured to change from the first switching state to the second switching state in the switch-on process of the relay module

A method of controlling the behavior of a latching relay includes receiving a configuration signal of either a first behavior signal or a second behavior signal, receiving a power status signal of either a powered or unpowerered signal, receiving either a low-to-high or a high-to-low signal command signal, generating latching pulse in response to receiving a powered signal input as the power status signal and a low-to-high signal as the command signal, generating an unlatching pulse in response to receiving a powered signal input as the power status signal and a high-to-low signal as the command signal input, and generating an unlatching pulse in response to receiving the second behavior signal as the configuration signal and the unpowered signal as the power status signal.

An industrial process field device includes an active component, a latching relay, a controller, a relay drive, and a reset circuit. The active component may be a sensor configured to sense a process parameter, or a control device configured to control a process of the industrial process. The controller is configured to generate a switch signal, and the relay drive is configured to set the latching relay in one of a set state and a reset state based on the switch signal. The reset circuit is configured to set the latching relay to the reset state in response to an interruption of electrical power to the relay drive.

A control circuit and method for a single coil magnetic latching relay is provided in the present disclosure. The circuit includes: a first control circuit (21) and a first single coil magnetic latching relay coil (22). The first control circuit (21) includes: a first transistor (211), a first diode (212), a second diode (213), a first capacitor (214), a second capacitor (215), a first resistor (216) and a second resistor (217) and the first control circuit (21) is configured to control the first single coil magnetic latching relay coil (22) to enter a preset state and/or maintain the preset state.

The present invention relates to a technology that monitors a normal operation state through whether the flow of minute current is maintained in real time when a latch relay is turned on and allows the latch relay to be forcibly turned off through current prestored in a supercapacitor when an off operation of the latch relay is not normally performed.

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.

The invention relates to a single-phase, equipotential, self-powered recloser with a load life of more than 20 years, for installing in 15 KV medium-voltage networks, directly on Matthews-type fuse bases, using hooksticks, and without requiring the interruption of the energy supply. Said recloser uses a bistable electromagnetic actuator that controls a vacuum bulb for interrupting the current in the event of a fault. It stores energy in ultracapacitor banks which receive the first charge by means of an induction coil.

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.

Provided herein is an improved bi-stable relay operable with a relay control circuit including a boost converter and an energy storage device, which is used to switch the bi-stable relay. In some embodiments, the bi-stable relay includes a solenoid wound with multiple coil windings. A conductive plate (e.g., a bus bar) may be coupled to a plunger of the solenoid, and is provided with contacts on each end of the conductive plate. The conductive plate is configured to electrically engage and disengage the solenoid upon respective application of power to the solenoid. The control circuit causes the solenoid to remain in an open position when selectively energized by a pulse for moving and retaining the conductive plate of the plunger against the solenoid for allowing wide operating voltage and reduced operating power.