Abstract: The switching control apparatus includes a switching driving unit for turning on and off the switch, a control-purpose power supply for outputting electric power, a power transmission unit provided between the switching driving unit and the control-purpose power supply, for supplying or cutting off electric power from the control-purpose power supply to the switching driving unit, and a control unit for controlling the power transmission unit. The control unit controls the switching driving unit to turn the switch on or off, during a period in which the electric power from the power supply to the switching driving unit is cut off by the power transmission unit, or supplied from the power supply to the switching driving unit.

Abstract: A renewable energy source is converted into a desired DC voltage that is delivered to a DC motor controller of a permanent magnet motor. A micro controller monitors the amount of supplied renewable DC having the desired DC voltage, which is delivered to each phase of the motor by turning on FET switches on demand. If the renewable DC available at a given instant is not adequate to power a particular phase of the motor, then the micro controller turns on backup FET switches that are part of an independent drive circuit that is in parallel with drive circuits of the renewable DC power circuit, to deliver to the motor line DC, which is produced from an AC supply that has gone through an AC to DC converter. Once charged, the renewable DC power will power the next available phase of the motor.

Abstract: In one embodiment, a capacitive switching system may include a plurality of capacitive switches and at least one processor. Each of the capacitive switches may include an activation surface offset from an energized conductor by a dielectric region and a capacitance that is dependent upon an electric field generated by the energized conductor. The at least one processor may execute machine readable instructions to transform a change in the capacitance of one of the capacitive switches into a first control signal indicative of a first active state. A rejection delay may be activated by the at least one processor after the change in the capacitance of the one of the capacitive switches. The rejection delay can remain activated for a predetermined time period. A second control signal may be prevented from indicating a second active state while the rejection delay is activated.

Abstract: A power converter for a load with varying power requirements dynamically adjusts its supply voltage to the load so as to track the radio frequency (RF) envelope of the signal being carried by the load. The supply voltage can be provided by a multiple-output charge pump providing multiple output voltage levels concurrently, and a switch to provide a selected one of the different output voltage levels as the supply voltage to the load. A controller controls the switch to dynamically modify the voltage level selected for output as the supply voltage such that the supply voltage tracks the RF envelope of the signal being carried by the load. As the switching losses of transistors of the power converter may exceed the power savings achieved through envelope tracking, the power converter employs a peak following frequency divider circuit that limits the switching frequency of the power converter to a threshold frequency.

Abstract: The invention provides for an upgrading of equipment without the potential problems in replacing the existing system. A relay mechanism is interposed between the existing remote sensor and the existing controller, and between the existing controller and the existing remote operational mechanism. The relay mechanism permits the existing system to perform as before while allowing the signals from both the existing remote sensor and the existing controller to be monitored by a new and isolated replacement controller until such time that the existing controller is isolated allowing the replacement controller assumes operational duties. In this manner, the upgrading of the system is done without the costs of down time nor the potential for catastrophic results.

Abstract: Techniques for routing and shielding signal lines to improve isolation between the signal lines are disclosed. In an exemplary design, an apparatus includes first, second, and third signal lines and a switch. The first, second, and third signal lines are configurable to carry first, second, and third signals, respectively. The switch is coupled between the second signal line and AC ground and is closed when the second signal line is not carrying the second signal. The second signal line isolates the first and third signal lines when the switch is closed. Adjacent signal lines are not active at the same time. A signal line may include positive and negative signal lines, which may have at least one cross over in order to cancel coupling between the positive and negative signal lines.

Abstract: An apparatus and method for load sharing among N current supplies, where N>1. N current supply paths are coupled to corresponding N independent power sources, respectively. A system load is coupled to the outputs of the N current supply paths to receive N current supplies. There is a common current share bus configured to connect to the N current supply paths to provide a common current share signal, used to indicate the current contribution needed from each of the N current supply paths. In this configuration, each of the N current supply paths adjusts an adjustable voltage drop between its power source and the current supply it provides to the system load in accordance with the common current share signal so that the current supplied from each current supply path is consistent with the common current share signal.

Abstract: Multiple-contact switches are disclosed. An example multiple-contact switch disclosed herein includes a double throw switch having a common terminal, a first throw terminal, and a second throw terminal, the common terminal being coupled to a reference; a first throw circuit coupled to the first throw terminal, the first throw circuit to output an open signal to a process control device when the common terminal is substantially in contact with one of the first throw terminal or the second throw terminal; and a second throw circuit coupled to the second throw terminal, the second throw circuit to cause the first throw circuit to output a close signal to the process control device when the common terminal is substantially in contact with the other one of the first throw terminal or the second throw contact terminal, wherein at least one of the open signal or the close signal corresponds to the reference.

Abstract: A hot swap controller includes a shunt resistor (32-1,2) and a power transistor (37-1,2) having a source coupled to a load maintains the first power transistor in a fully-turned-on condition to cause it to deliver a load current contribution (IL1,2) which flows through the shunt resistor and the power transistor to the load (25). Current sensing circuitry (35-1,2) produces a first control signal (V45-1,2-V47-1,2) equal to the difference between a DC component (V47-1) proportional to a first load current contribution (IL1) flowing in the first shunt resistor and a feedback-based component (V45-1). A control amplifier (49-1,2) produces a second control signal (V51-1,2) in response to the first control signal to modify a drive signal (53-1) to the power transistor so as to reduce a channel resistance of the power transistor if the first control signal exceeds a predetermined level.

Abstract: A device for producing a current pulse includes supply terminals for providing a power supply voltage, and a switch which is situated in a control current branch between the supply terminals, which switch is configured to switch a control current through the control current branch as a function of an actuation signal. The device also has a current mirror having a control transistor and a signal transistor, the control transistor being situated in series to the first switch in the control current branch, and the signal transistor being configured to provide the current pulse as a function of the control current through the control transistor.

Abstract: A bypass mechanism for a photovoltaic module which switches out the electronics and switches in a bypass mechanism.

Abstract: A combined power and input/output system for an electronic device includes a host system; a target system operably coupled to the host system via a combined power and I/O line; and a power boost circuit in the target system for enabling a higher voltage target device.

Abstract: An electric circuit for remotely starting and controlling the direction of a center pivot irrigation system comprises a first transformer, a second transformer, a first relay, a second relay, a third relay, and a fourth relay. The first transformer is coupled to a voltage source with a first voltage and may step the first voltage down to a second voltage. The second transformer is coupled to the first transformer, receiving a third voltage and stepping the third voltage up to a fourth voltage. The first relay may include contacts that are open when the irrigation system is started remotely. The second relay may include contacts that are closed when the irrigation system is started remotely. The third relay may include contacts that are closed momentarily to drive the system in a first direction. The fourth relay may include contacts that are closed momentarily to drive the system in a second direction.

Abstract: A system comprises a processor and a graphical user interface (GUI) executable by the processor. The GUI enables a user to specify constituent virtual connect domains (VCD) for a common VCD group. Each VCD comprises two or more computing devices virtualized by a virtual connect device. The virtual connect device comprises multiple ports for communicatively coupling the two or more computing devices to external networks. For all of the constituent VCDs of a particular VCD group, each corresponding port of a corresponding virtual connect device is connected to the same external.

Abstract: A switch controller is provided that uses one or more capacitors to generate a slow turn on/slow turn off switch control signals to suppress audible switching noise in an audio switch. In some embodiments, an analog inverter and a capacitor are used to generate the switch control signals, while in other embodiments two capacitors are used to generate the switch control signals. To conserve power between switching states, routing logic is provided that ties the switch control signals to respective voltage rails and disables selected portions of the switch controller.

Abstract: A network switch (5) for example a PoE switch, is operable to control supply of electrical power to individual luminaires (1,2) in a lighting network. The luminaires receive both electrical power for operation and signals to switch on and off through a common cable connection (9) such as an Ethernet connection. When switched on, each luminaire sends a signal repeatedly towards the Po E switch until switched off and the switch (5) supplies power to the luminaire whilst successive signals are received within a period less than a predetermined shut off period (?). In this way, power to the luminaire can be disconnected to avoid comsumption of standby power when not in use.

Abstract: An image forming apparatus includes a control unit to identify a type of an option unit using pre-stored ID information including information regarding a universal interface to which at least one type of option unit can be connected, a power supply unit, and an option unit connected to the universal interface. A plurality of switches is located along a power supply path between the option unit and the power supply unit. The pre-stored ID information includes the type of the option unit and level of power allowed for the type of option unit. The control unit controls on/off states of the plurality of switches so that power corresponding to the identified type of option unit can be supplied to the option unit. Accordingly, possible damage to the image forming apparatus due to inappropriate connection between the option unit and the image forming apparatus is prevented.

Abstract: A system includes a soft DC power source having an output terminal, a DC load, a disconnect switch coupled between the output terminal of the DC power source and the DC load, and a capacitor coupled between a power side of the disconnect switch and a reference potential. The capacitor inhibits a rise in voltage across the disconnect switch as the disconnect switch is opening to inhibit arcing in the switch. Further, a disconnect switch assembly includes a pair of input terminals for coupling to a DC power source, a pair of output terminals for coupling to a DC load, a disconnect switch coupled between one of the input terminals and one of the output terminals, and a capacitor coupled between the pair of input terminals.

Abstract: Systems and methods of interconnecting devices may include an input/output (IO) connector assembly having a voltage regulator, one or more signaling circuits, a first set of contacts, a second set of contacts connected to the one or more signaling circuits, and logic to receive a configuration command. The logic may also connect the first set of contacts to the voltage regulator if the configuration command corresponds to a first protocol. If the configuration command corresponds to a second protocol, on the other hand, the logic can connect the first set of contacts to the one or more signaling circuits.

Abstract: An apparatus, system, and method are disclosed for composite and symmetrical hybrid electronic connectors. Embodiments may include a composite electronic connector 1702 having a set of signals 2402, being divisible into multiple subconnectors 1802, each having a subset of the signals 2404/2408, a harness 204 that combines the subconnectors 1802, distribution 2508 of the set of signals 2402 to the subsets of the signals 2404/2408, a symmetrical electronic connector 208, being connectable in more than one orientation, a tongue 210 within the symmetrical connector 208 having more than one contacting surface 902/1002, each having a set of contacts 404/408, mapping 2512 of the signals 2402 to the contacts 404/408 so as to achieve a correct connection independent of the orientation of the symmetrical connector 208, a cable 106 between the composite connector 1702 and the symmetrical connector 208, and switching 2518 of a power signal 2402-5 on and off.

Abstract: Techniques are disclosed involving reconfigurable coils. Such coils may be used in applications, including (but not limited to) wireless charging and near field communications (NFC). For instance, a reconfigurable coil may include a first conductive portion and a second conductive portion. Two or more configurations may be established. These configurations may correspond to particular current paths. For example, in a circular configuration, a path is provided having the same rotational sense in both first and second conductive portions. However, in a figure eight configuration, a path is provided having a first rotational sense in the first conductive portion and a second rotational sense in the second conductive portion. A switch coupled between these portions may set the coil's configuration. Configurations may be selected based on one or more operating conditions involving the coil.

Abstract: A malfunction detecting device for a solar cell panel includes an AC source that is provided on one of positive and negative sides of a solar cell panel body and can apply AC voltage superimposed on DC voltage to the solar cell panel, a measuring means provided on another of the positive and negative sides of the solar cell panel body to measure voltage or current output from the solar cell panel, and a control unit including a malfunction determination portion that controls the AC source to control input voltage or input current to be input to the solar cell panel and determines malfunction in the solar cell panel by comparing the input voltage or the input current to output voltage or output current measured by the measuring means. The malfunction determination portion includes a panel body malfunction determination portion and a bypass diode malfunction determination portion.

Abstract: A circuit for a hard disk drive (HDD) includes an indication unit, a HDD connector with a predefined pin, and a jumper coupled between the HDD connector and the indication unit. The jumper includes a base and a jumper block. The predefined pin performs different functions according to the jumper block being coupled between two corresponding pins of the base.

Abstract: A dispensing switch in an appliance and a method of controlling a dispensing assembly based on a plurality of outputs of the dispensing switch is provided. A dispensing assembly can dispense ice cubes and/or water from the appliance when the dispensing switch is actuated. The dispensing switch can have a plurality of outputs. For instance, the dispensing switch can provide outputs through a common terminal, a normally open terminal, and a normally closed terminal. When the dispensing switch is actuated, a controller can monitor the plurality of terminals to determine whether a change in the outputs has occurred. After the controller determines that a change in the outputs of the dispensing switch has occurred, the controller can control the dispensing assembly based on the outputs of the dispensing switch.

Abstract: A solid state circuit breaker includes a first terminal; a second terminal; a first wide-band gap field effect transistor coupled to the first terminal; a second wide-band gap field effect transistor coupled to the second terminal, wherein the first wide-band gap field effect transistor and the second wide-band gap field effect transistor are common-source connected to one another; and a bi-directional snubber device coupled to the first wide-band gap field effect transistor and the second wide-band gap field effect transistor. Such a solid state circuit breaker may also include a gate drive circuit coupled to the first wide-band gap field effect transistor and the second wide-band gap field effect transistor, where the gate drive circuit may comprise a voltage regulation stage and a drive stage.

Abstract: A modular direct-current power conversion system is applied to receive a DC input voltage and output a DC output voltage. The modular direct-current power conversion system includes a main board and a plurality of DC power conversion modules. The main board includes a primary surface, a voltage input terminal, a voltage output terminal, a plurality of insertion regions, and a plurality of pin holders. When the DC power conversion module is inserted on the main board, the DC input voltage is inputted via the voltage input terminal to the DC power conversion module. The DC power conversion module converts the DC input voltage into a DC output voltage, and the DC output voltage is outputted via the voltage output terminal.

Abstract: Electronic devices may use buttons to gather user input. Button status monitoring circuits may be provided that apply a time-varying bias voltage to each button. The time-varying bias voltage may be held at a fixed non-zero level when the state of the button is being monitored and may be held at a level of zero volts when the state of the button is immaterial and is not being monitored. The reduction of the bias voltage across the button when the button is not being monitored prevents undesired acceleration in dendritic growth when the electronic device is exposed to moisture. The bias voltage may be pulsed by using a control circuit. The control circuit may generate a series of square wave pulses that are applied across the terminals.

Abstract: Techniques for improving performance of a transformer shared amongst a plurality of operating modes. In an aspect, first and second primary windings of a transformer are coupled to an AC ground voltage. Primary windings are mutually coupled to a secondary winding of the transformer. To render the second primary winding inactive, e.g., when operating in a first mode, a switch coupling the second primary winding to the common reference voltage is opened. Similarly, when it is desired to render the first primary winding inactive, e.g., when operating in a second mode, a switch coupling the first primary winding to the common reference voltage is opened. In this manner, the inactive primary winding advantageously does not load the secondary winding. Further aspects provide for, e.g., extending the techniques to more than two modes, and alternative techniques to mutually couple the signal from the primary to the secondary winding.

Abstract: A power off delay circuit includes a switch connected between an external power input terminal and an internal power supply terminal, a capacitor connected to the internal power supply terminal, and a hysteresis comparator to switch the switch according to the voltages of the external power input terminal and the internal power supply terminal. During on-time of the switch, the external power input terminal is connected to the internal power supply terminal and the capacitor can be charged by the external power source. When the switch is off, the capacitor provides electric power for an internal circuit. Application of the power off delay circuit to an audio system may eliminate the turn-off pops of the audio system.

Abstract: Embodiments are directed to a discrete input circuit comprising: a switch, a capacitor coupled to the switch, a first resistor connected in series with the capacitor and coupled to a power supply, and a second resistor coupled to the power supply and the switch, wherein a value of the capacitor, a value of the first resistor, and a value of the second resistor are selected to provide a wetting current from the power supply to the switch when the switch is closed in order to clean contacts associated with the switch.

Abstract: A circuit breaker comprising first and second JFETs, each comprising a gate, drain and source connection, the JFETs sources being operatively connected to each other to form a common-source connection and adapted to be connected to and operating to open an external circuit when the current flowing through the JFETs exceeds a predetermined threshold, the JFETs' gates, and common-source connection being operatively connected to a gate driver circuit which causes the JFETs to turn off when the predetermined threshold is exceeded; whereupon the current flows through the common-source connection into the second gate and into the gate driver circuit which causes the gate driver circuit to turn off the first and second JFETs and open the circuit breaker. Also claimed is a method of sensing an overloaded circuit comprising leading and trailing JFETs in a circuit that open the circuit and prevent current flow when a predetermined threshold is exceeded.

Abstract: Determining power topology of a computer system. At least some of the illustrative embodiments are methods including communicating with a first computer system of a plurality of computer systems mounted in a rack (the communicating through dedicated communication conductors integral with a first cord carrying operational power to first computer system), communicating with a second computer system of the plurality of computer systems (the communicating through dedicated communication conductors integral with a second cord carrying operational power to first computer system), determining a power topology regarding the plurality of computer systems based on the communicating, and displaying an indication of the power topology.

Abstract: A generator coupling kit is provided. In exemplary embodiments, the generator coupling kit may comprise a wire adapted to couple with a generator on a first end, the wire adapted to couple with an outdoor box on a second end; the outdoor box adapted to couple with the wire; an indoor electrical panel adapted to couple with the outdoor box via a generator breaker; and the generator breaker adapted to couple with indoor electrical panel, the generator breaker adapted to couple with the outdoor box via internal wiring, the generator breaker comprising a circuit breaker.

Abstract: A solar photovoltaic junction box for being electrically connected to a solar cell array. The junction box comprises a plurality of input branch lines electrically connected to solar cell strings, an output aggregate line that converges the plurality of branch lines, a back-flow preventing diode provided on each of the branch lines, a capacitor parallel-connected to each of the back-flow preventing diodes, an AC voltage generator that is provided on the aggregate line to allow an AC voltage to be applied to the solar cell array, a measuring means for measuring an alternating current flowing in the solar cell array, and a control unit comprising an malfunction determination portion for determining a malfunction in the solar cell array on the basis of the AC voltage applied by the AC voltage generator and the alternating current measured by the measuring means.

Abstract: A line switching system is a line switching system which switches line of a power supply system including: a plurality of PV panels which generate power using renewable energy; at least one PCS which conditions supplied power to output the conditioned power to a power system; and a first switch which connects any one of the PV panels and the PCS, wherein the line switching system includes a display device which displays an image corresponding to the power supply system and receives an operation on the image from the user, and a control unit which is configured to switch between conduction and non-conduction between a plurality of PV panels and the PCS by controlling the first switch according to the operation received by the display device.

Abstract: A load leveling system and method capable of controlling switches such that it appears to a generator that the load is constant. The purpose is to prevent high-load simultaneous switching or multiple synchronous switching from damaging sensitive equipment. The present invention utilizes a central controller communicating to a number of switches such that the switches turn off and on in a synchronized, serialized manner. As one switch turns “off,” another should be turning “on” until a cycle is completed. In this manner, the generator will only see a single “on” and a single “off” load per cycle. The various switches are scheduled such that, ideally, the power load seen by the power source has emissions of no more than one PWM load superpositioned with zero or more constant, non-modulated loads.

Abstract: Embodiments described include voltage generators having reduced or eliminated cross current. Dynamic adjustment of a low or high threshold voltage used in a voltage generator is described. Use of a folded cascade amplifier in a voltage generator is also described.

Abstract: A power feed entry circuit, a module with the power feed entry circuit, and a daughter board with the power feed entry circuit include a first circuit coupled to inputs and outputs, wherein the first circuit is configured for power connections, return isolation relays, diode Or-ing, and output status-indication light-emitting diodes (LEDs); a second circuit coupled to the first circuit, the inputs, and the outputs, wherein the second circuit is configured with a hot swappable controller and provides common-mode and differential mode power line filtering; a third circuit coupled to the first circuit, wherein the third circuit is configured for alarm monitoring of the first circuit and the second circuit; and a fourth circuit coupled to the first circuit and the third circuit, wherein the fourth circuit comprises a dual feed high and low active field effect transistor Or-ing circuit.

Abstract: A device and method including: an energy consumption sensor; a wireless communications component adapted for wireless communication; a processing unit, adapted to receive energy consumption data from the energy consumption sensor and transmit the energy consumption data via the wireless communications component; and a switch having: a closed state coupling the input end of the device to the output end of the device, and an open state, disconnecting the input end of the device from the output end of the device.

Abstract: A switch assembly, for instance adapted to wall-side installations, for supply arrangements of a load via multiple activation points (for example in the form of “double switching”), comprises a pair of traveler contacts alternatively connectable to a power supply, as well as a switch having an output contact, alternatively connectable to one or the other of the traveler contacts, respectively, on the basis of the current position of switch. Switch is an electronic switch which is connected, for example through an electronic circuit which optionally also performs a driving function on switch, to a respective power line. Powering elements are provided, for example in the form of a pair of diodes, controlled electronic switches or diode bridges, which connect said respective power line to the one of traveler contacts which is currently connected to power supply, therefore ensuring a steady supply irrespective of the switch position.

Abstract: A semiconductor device includes: a first power line to supply a first voltage to a plurality of internal circuits; a second power line to supply the first voltage to the plurality of internal circuits; a first switch provided between said first power line and each of the plurality of internal circuits; a second switch provided between said second power line and each of the plurality of internal circuits; and a control circuit to control the first switch of a second internal circuit included in the plurality of the internal circuits based on the amounts of noise and voltage drop at power-on in a first circuit included in the plurality of internal circuits.

Abstract: In a feed line switching apparatus, a situation in which the feed line switching apparatus cannot work when feed lines have a predetermined connection relationship is prevented. The feed line switching apparatus includes a command acquisition unit which acquires a feed line switching command which designates a connection relationship of feed lines, a switching execution unit which switches the connection relationship of the feed lines in accordance with the feed line switching command acquired by the command acquisition unit, and a switching control unit which suppresses switching of the connection relationship of the feed lines in the switching execution unit for a predetermined feed line switching command.

Abstract: An electric storage system includes an electric storage apparatus, relays, a plurality of smoothing capacitors, and a current limiting resistance. The electric storage apparatus has a plurality of electric storage elements connected in series. Each of the electric storage elements includes a current breaker breaking an electric current path inside the electric storage element. The plurality of smoothing capacitors are connected in series between a positive electrode line and a negative electrode line which connect the electric storage apparatus to a load. Each of the relays is placed on the positive electrode line, the negative electrode line, and an intermediate line. The intermediate line connects a connecting point of two of the electric storage elements included in the electric storage apparatus and a connecting point of the plurality of smoothing capacitors. The current limiting resistance is also placed on the intermediate line.

Abstract: The power sensing device includes a power input interface in electrical communication with a current sensing circuit and a voltage sensing circuit. The current sensing circuit is connected to a load. The voltage sensing circuit is connected in parallel with the load. A metering integrated circuit and a micro-controller unit (MCU) are included. The metering integrated circuit receives a first analog signal indicating a load current value from the current sensing circuit, and a second analog signal indicating a load voltage value from the voltage sensing circuit. The metering integrated circuit converts first and second analog input signals to first and second digital signals, respectively, and generates the first and second digital signals as digital communication pulses to the MCU. A decoder circuit includes a communications port to send and receive data associated with a sensed current parameter and a sensed voltage parameter.

Abstract: Example apparatus and methods to remove power from a field device are disclosed. An example apparatus includes a first switch to control power to the field device, and a second switch comprising a first gate and a second gate. The second gate is electrically coupled in parallel to the first gate, and the second switch is electrically coupled in series to the first switch. The example apparatus also includes a first diagnostics controller to control the first and second gates, a first processor to control the first switch, a third switch to control power to the field device, and a fourth switch comprising a third gate and a fourth gate. The fourth gate is electrically coupled in parallel to the third gate, and the fourth switch is electrically coupled in series to the third switch. The example apparatus also includes a second processor to control the third switch, and a second diagnostics controller to control the third and fourth gates.

Abstract: An internet device and an automatic switching method, apparatus and circuit for a charging interface of an internet device are disclosed. The device includes a device charging interface (20), a dock charging interface (30), a charging loop (40) and an automatic switching apparatus (10) for a charging interface. The method includes: when external power supply is connected into the device (S001), judging whether a dock charging interface a the device is in place (S002), if so, isolating a device charging interface of the device and at the same time, connecting a charging loop of the device through a dock charging interface of the device (S003); otherwise, isolating the dock charging loop of the device and at the same time, connecting the charging loop of the device through the device charging interface of the device (S004). The device is convenient to implement and has the advantages of reliable performance and low cost.

Abstract: An apparatus for saving standby power in a microwave oven includes a power switch that powers on the microwave oven; a power saving button that powers off the microwave oven; a power saving relay connected in parallel to the power switch and having a contact point to the power supply to the microwave oven that is turned on or off according to a control signal; and a control unit configured to turn on the contact point of the power saving relay when a contact point of the power switch is turned on, and turn off the contact point of the power saving relay when the power saving button is pressed.

Abstract: In response to turning-on of a lock-type power switch, an initial controller outputs a first voltage for a first period and a gate is turned on for the period via a first driver responsive to the first voltage, then DC power is supplied to a main circuit. During the period, a control processor causes a voltage output section to start outputting a second voltage so that the gate is turned on via a second driver to continue the DC power supply. When no event has been generated for a second period, the second voltage from the voltage output section is stopped to turn off the gate, thus the power supply to the main circuit is shut off. Once a power from outside is switched from OFF to ON while the power switch kept ON, the power supply to the main circuit is resumed via the controller and first driver.

Abstract: A dark current cutoff device (1) includes: a battery (10) configure to perform electrical power supply to a load (20); a cutoff switch (32), which is provided between the battery (10) and the load (20), cuts off the electrical power supply to the load (20) at a time of being opened, and supplies electrical power to the load (20) at a time of being closed; a failure recording unit (21) that determines and records a case where the load (20) does not operate as a failure of the load (20); and an open/close determining unit (41) that determines that the cutoff switch (32) is opened; and a recording prohibiting unit (22) configure to prohibit, in a case where the cutoff switch (32) is determined to be opened by the open/close determining unit (41), the failure recording unit (21) from determining and recording the failure.

Abstract: A hybrid neutral transfer switch in an electrical system to transfer a load between multiple AC power sources is provided. The hybrid neutral transfer switch includes a neutral gate controlled device connected to a neutral input of each of the multiple power sources and a mechanical transfer switch that switches between the neutral input of each of the power sources. During the transfer of power from one power source to another power source, the neutral gate controlled devices are activated and/or deactivated in conjunction with the switching of the mechanical transfer switch from one neutral input to another neutral input.