A pneumatic detection system and a method of forming the pneumatic detection system are described. The system includes a sealed tube, a refrigerant disposed within the sealed tube, and a switch configured to be activated based on a specified pressure being reached within the sealed tube.

A pneumatic detection system and a method of forming the pneumatic detection system are described. The system includes a sealed tube, a refrigerant disposed within the sealed tube, and a switch configured to be activated based on a specified pressure being reached within the sealed tube.

A method is disclosed for testing a latching magnet of a switch including a switching contact, formed from contact elements mechanically separated from one another for opening the switching contact; an electronic trip unit, to monitor current flowing via the contact elements and to perform a test for a current-dependent trip condition; an electrical energy store, forming a circuit with the winding of the latching magnet, the circuit being closed for a first closing time when the trip condition of the trip unit is met; and an actuator, actuable by closing off the circuit and configured to separate the contact elements. For test purposes, the circuit is closed for a second closing time, which is so short that separation of the contact elements by the actuator does not take place. A test is then performed to ascertain whether there is a current flowing via the winding of the latching magnet.

One embodiment describes a three-phase electromechanical switching device, which includes three single-phase switching devices mechanically and electrically coupled in parallel with one another, each single-phase switching device including a direct current electromagnetic operator that in operation receives a direct current control signal for switching of the device, stationary contacts disposed in a respective device housing, and a movable assembly that in operation is displaced by energizing the operator and that include movable contacts that open and close, with the stationary contacts, a single current carrying path through the respective single-phase switching device; in which each of the single-phase switching devices receives control signals from control circuitry coupled to the operators of the respective single-phase switching devices to cause at least one of the single-phase switching devices to open or close the single current carrying path at a desired time coordinated with a current zero-crossing or a predicted current zero-crossing of a phase of three-phase power.

A diagnostic system for a voltage regulator is provided. The diagnostic system includes a microcontroller having first and second analog-to-digital converters and first and second output ports. The first analog-to-digital converter outputs a first voltage value corresponding to the first voltage from the voltage regulator. The microcontroller executes a first diagnostic function to set a first voltage regulator diagnostic flag equal to a fault value indicating a voltage out of range condition, if the first voltage value is greater than a first threshold voltage value or the first voltage value is less than a second threshold voltage value. The microcontroller executes a second diagnostic function to stop generating first and second control signals to de-energize a contactor coil to open a contact of a contactor if the first voltage regulator diagnostic flag is equal to the fault value.

An automatic transfer switch (100) for automatically switching an electrical load between two power sources is provided. Two power cords (106) enter the ATS (A power and B power inputs) and one cord (109) exits the ATS (power out to the load). The ATS has indicators (107) located beneath a clear crenelated plastic lens (108) that also acts as the air inlets. The ATS (100) also has a communication portal (103) and a small push-button (104) used for inputting some local control commands directly to the ATS (100). The ATS (100) can be mounted on a DIN rail at a rack and avoids occupying rack shelves.

A switching splitter and method of operating the same comprises a first port, a second port in communication with the first port and a third port in communication with the first port. A switching module is in communication with the second port and the third port. The switching module switches in response to a direct current voltage at the second port. The switching module communicates a control signal from the second port to the first port or from the third port to the first port in response the direct current voltage.

The disclosure discloses a liquid arc voltage transfer based direct current breaker and a use method thereof. The direct current breaker includes a first connection terminal, a second connection terminal, a main current branch, a transfer branch and an energy dissipation branch. The main current branch is connected between the first connection terminal and the second connection terminal, and the main current branch includes a liquid break. The transfer branch is connected between the first connection terminal and the second connection terminal and is connected in parallel with the main current branch. The energy dissipation branch is connected between the first connection terminal and the second connection terminal and is connected in parallel with the main current branch and the transfer branch.

A power supply apparatus is disclosed. The power supply apparatus to supply power to an electronic apparatus includes a first relay and a second relay which are turned on and off to control power supply with respect to the electronic apparatus, and a processor configured to control a switching operation of the first relay and the second relay based on at least one of a connection detection signal indicating connection of the power supply apparatus and the electronic apparatus, and a power on/off signal indicating a power on/off command with respect to the electronic apparatus.

A power supply apparatus is disclosed. The power supply apparatus to supply power to an electronic apparatus includes a first relay and a second relay which are turned on and off to control power supply with respect to the electronic apparatus, and a processor configured to control a switching operation of the first relay and the second relay based on at least one of a connection detection signal indicating connection of the power supply apparatus and the electronic apparatus, and a power on/off signal indicating a power on/off command with respect to the electronic apparatus.