A control unit includes: an input portion that receives the positional information of a vehicle; a calculation unit that generates a control signal for controlling an electromagnetic relay; and an output portion that outputs the control signal to the electromagnetic relay. The calculation unit determines whether a location region of the electromagnetic relay is a relay-freeze region, the location region being identified by the positional information of the vehicle, and, when the location region of the electromagnetic relay is a relay-freeze region, performs a freeze inhibiting process for preventing the electromagnetic relay from being frozen or defrosting the electromagnetic relay by opening and closing the electromagnetic relay and causing the electromagnetic relay to vibrate.

A boat having an electric motor coupled with an electrical store is disclosed. The electrical store includes a storage element, and positive and negative poles in current-conducting connection with the storage element. An isolating circuit element is operatively connected to a user activatable emergency stop switch. The isolating circuit element is configured to, upon activation of the emergency stop switch, isolate the current-conducting connection between the storage element and at least one of the poles.

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 a 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.

A magnetically actuated MEMS switch 100 includes a first magnetic core portion 120, a first signal line 15, a first contact point 16, a second magnetic core portion 220, a second signal line 25, a second contact point 26, and a first coil portion 111 and a second coil portion 211 serving as a magnetic field applying portion that causes a current to flow in conductor coil to apply a magnetic field to the first magnetic core portion 120 and the second magnetic core portion 220. The first contact point 16 is displaced depending on the presence or absence of a magnetic field applied by the magnetic field applying portion. Connection and disconnection between the first contact point 16 and the second contact point 26 are switched in response to displacement of the first contact point 16.

A device includes a device input, an output connector configured to connect to a current loop, and current loop transmitter circuitry. The current loop transmitter circuitry receives, via the device input, an input from a dry contact switch, and translates a state of the dry contact switch to a current loop current. The current loop transmitter circuitry transmits the current loop current via the output connector through the current loop.

Systems and methods for contact erosion mitigation are provided. To perform contact erosion mitigation, an order of opening/closing poles and/or contact relays of particular poles is altered, resulting in a sharing of potential arcing conditions amongst the poles/contact relays of these poles.

Provided is a touch sensing system that can make the life of a contact of an electromagnetic contactor longer. A touch sensing system includes a main operation circuit that connects a probe and a main operation power supply, and in which an electromagnetic contactor is provided; and a touch sensing circuit that is connected to the main operation circuit through the electromagnetic contactor in a branched manner, and connects the probe and a touch sensing power supply, is which a solid state relay switch is provided in the touch sensing circuit.

A high-voltage switch is disclosed. The switch includes a substrate, a first contact fixedly coupled to the substrate, a second contact having a first position in conductive contact with the first contact and a second position not in conductive contact with the first contact; and an actuator comprising a body fixedly coupled to the substrate and a movable element coupled to the second contact. The actuator is configured to selectably move the second contact between its first and second positions. The switch has a breakdown voltage greater than or equal to 500V and does not include an arc suppression element.

Disclosed are a circuit with a timing function and a leakage protection plug. An output terminal of a timing chip U2 is connected to an isolating switch U3; the isolating switch U3 is connected to a rectifier module D3; the rectifier module D3 is connected to a circuit breaker X1; a switch tube Q4 and the switch tube Q3 are connected to a resistor R21, and a second switch terminal of the switch tube Q4 is grounded; an output terminal of a zero sequence current transformer is connected to a first input terminal of a microprocessor U1; and an output terminal of the microprocessor U1 is connected to a control terminal of the switch tube Q4. The leakage protection plug of this disclosure has both leakage protection and timing functions.

The disclosure relates to a circuit breaker with a monitoring device having an electronic switch and a mechanical changeover switch, where the mechanical changeover switch has a first terminal, a second terminal and a third terminal, where in a neutral position of the mechanical changeover switch the first terminal is connected to the third terminal and where in an operating position of the mechanical changeover switch the second terminal is connected to the third terminal, where the electronic switch is connected to the third terminal of the mechanical changeover switch as a series circuit, where when switching on the circuit breaker in a first switching state, initially the electronic switch is activated, where a measurement is taken at the first terminal using the monitoring device to determine whether essentially the same potential is present at the first terminal as at the third terminal and, it this is the case, the electronic switch is activated and the mechanical changeover switch is in an operating position in a subsequent additional switching state. Furthermore, the disclosure relates to methods for the circuit breaker.