A state of a tripping solenoid in a circuit breaker is determined by a primary coil and a secondary coil wound around a hollow body of a solenoid. The secondary coil is positioned within magnetic coupling distance from the primary coil and is configured to produce a sensing voltage based on the primary coil voltage. A ferromagnetic plunger positioned in the hollow body, is configured to slide axially to a tripped position to trip the circuit breaker when a trip voltage is applied to the primary coil. A plunger position detecting circuit connected to the secondary coil, is configured to detect the position of the plunger in the hollow body of the solenoid based on the sensing voltage. A reduction or absence of the sensing voltage indicates a faulty or broken connection in the primary coil.

The relay safety system provided by the present invention includes a relay, an emergency stop device, a trigger detection circuit, a sticking detection circuit, and a power-off circuit. The emergency stop device is used to generate an emergency stop signal. The trigger detection circuit connects the relay and the emergency stop device, and is used to convert the emergency stop signal into a trigger signal. The sticking detection circuit is connected to the trigger detection circuit and the relay, and is used to detect the sticking signal generated by the relay, and generate a power-off signal according to the trigger signal and the sticking signal. The power-off circuit is connected to the emergency stop device, the relay and the sticking detection circuit, and receives the power-off signal, and disconnects the power of the relay according to the power-off signal.

A power adapter configured to apply power to a device is disclosed. The power adapter comprises a switching module having a recess comprising a first set of contacts for receiving control signals, wherein the switching module comprises a switch for selectively applying power to a device based upon the control signals; and a control module removably coupled to the switching module and having a second set of contacts coupled to the first set of contacts of the switching module when the control module is attached to the switching module; wherein the switching module comprises a user interface element.

A power adapter configured to apply power to a device is disclosed. The power adapter comprises a switching module having a recess comprising a first set of contacts for receiving control signals, wherein the switching module comprises a switch for selectively applying power to a device based upon the control signals; and a control module removably coupled to the switching module and having a second set of contacts coupled to the first set of contacts of the switching module when the control module is attached to the switching module; wherein the switching module comprises a user interface element.

A magnetic field application device according to an embodiment includes a first coil assembly and a second coil assembly spaced apart in parallel from each other, a power supply configured to apply respective currents to the first coil assembly and the second coil assembly, a controller, and a resonator accommodation unit disposed between the first coil assembly and the second coil assembly, wherein each of the first coil assembly and the second coil includes a coil configured to generate a magnetic field, a guide member connected to a terminal of the coil, a magnetic material mount connected to a terminal of the guide member, and a magnetic material fixed to the magnetic material mount, and wherein the controller is configured to control the currents applied from the power supply to the first coil assembly and the second coil assembly.

Proposed are an input/output device and a control method for the same, the device including a first input/output terminal that receives a forward signal from a limit switch or outputs power to a sensor; a second input/output terminal that receives a backward signal from the limit switch or receives a sensing signal from the sensor; and an integrated circuit unit that determines a communication target for exchanging a signal through the first input/output terminal and the second input/output terminal, and selectively receives or outputs the forward signal, the backward signal, the power of the sensor and the sensing signal based on the determination result.

Proposed are an input/output device and a control method for the same, the device including a first input/output terminal that receives a forward signal from a limit switch or outputs power to a sensor; a second input/output terminal that receives a backward signal from the limit switch or receives a sensing signal from the sensor; and an integrated circuit unit that determines a communication target for exchanging a signal through the first input/output terminal and the second input/output terminal, and selectively receives or outputs the forward signal, the backward signal, the power of the sensor and the sensing signal based on the determination result.

An electrical switching element includes a housing, an armature moved by a coil arrangement, a contact arrangement switchable by the armature into at least two switching statuses, and a magnetic field sensor outputting a magnetic field-dependent switching signal representing the switching statuses. The armature, the contact arrangement, and the magnetic field sensor are arranged in the housing. The armature is arranged between the contact arrangement and the magnetic field sensor.

Testable sealed and/or self-diagnosing electromagnetic or solid-state relays simplify troubleshooting of electrical circuits. The testable relay comprises a relay housing with terminals adapted to connect to a circuit and an opposing top wall with testable terminals formed as projections being flush with or extending from the top wall and being exposed for testing the relay by applying a multimeter device. A self-diagnosing relay comprises a relay housing with terminals adapted to connect to a circuit, and at least two light-emitting diodes (LEDs). One of the LED indicates the relay is energized, and another LED light is a diagnostic LED and indicates if the relay is damaged.

A power adapter arrangement configured to provide power to a load is described. The power adapter arrangement may comprise a power adapter having a first interface comprising a first plurality of contact elements, and a second interface comprising a switch configured to control power applied to a load; and a control attachment removably coupled to the power adapter, wherein the control attachment comprises an actuator element configured to make contact with the power adapter in response to a manual actuation of the control attachment; wherein the power adapter further comprises a power control circuit configured to receive the power and provide the power to the load in response to a detection of a manual actuation of the toggle element.