Abstract: A plastic keypad with data entry elements and at least one display element is protected from electrostatic discharge by an assembly having an overlay substrate on which an electrically-conductive arrangement is disposed. The overlay substrate has a top side and a back side with a precisely-positioned vias formed through the substrate. A top surface of the top side is a layer of a conductive polymer. The back side is printed with at least one layer of color ink that depict a plurality of alpha-numerical and pictorial elements of the keypad. The electrically-conductive arrangement is disposed on the overlay substrate to collect electrostatic charges on the top side, transfer the electrostatic charges to the back side through the plurality of vias and drain the transferred electrostatic charges to a ground.

Abstract: A laminar electrostatic eliminator circuit includes a main control module, a control instruction sending unit, a first driving circuit, a first boost circuit, a second driving circuit, and a second boost circuit. A signal input terminal of the main control module is connected to an instruction sending terminal of the control instruction sending unit, a control terminal of the main control module is connected to an input terminal of the first driving circuit and an input terminal of the second driving circuit.

Abstract: Methods and apparatus for lift pin assemblies for substrate processing chambers are provided. In some embodiments, a lift pin assembly includes a lift pin comprising a shaft, a head, and a coupling end, the head configured to rest against an electrostatic chuck; an upper guide comprising a top end, a bottom end, and a first opening extending from the top end to the bottom end, wherein the shaft is disposed and axially movable through the first opening; a lower guide comprising a top end, a bottom end, and a second opening and a third opening extending from the top end to the bottom end, wherein the third opening is larger than the second opening, and wherein the shaft is disposed and axially movable through the second opening and the third opening; and a biasing mechanism coupled to the shaft and configured to bias the lift pin against the electrostatic chuck.

Abstract: A power supply system includes a power supply circuit, a sensor of the current flowing through a terminal of the power supply circuit and a protection circuit. The protection circuit includes a differentiator adapted to measure a slope of a current measurement signal and comprises a driving stage. The power supply circuit is configured to receive a disconnection signal and, alternatively, to electrically connect the internal components thereof to its terminal or electrically disconnect the internal components thereof from its terminal, as a function of the value of the disconnection signal.

Abstract: A circuit interrupting device including a phase conductor, a neutral conductor, an interrupter configured to disconnect the phase conductor and the neutral conductor from a load, and a sensor configured to generate a signal indicative of current flowing through the phase conductor and the neutral conductor. The circuit interrupting device further includes a microcontroller that includes an electronic processor and is electrically connected to the first sensor and the interrupter. The microcontroller is configured to generate a reference signal, receive a first signal from the sensor, determine whether a difference between a voltage of the first signal and a voltage of the reference signal exceeds a threshold, determine whether the microcontroller has performed a ground fault self-test, and activate the interrupter when the difference exceeds the threshold and the microcontroller has not performed the ground fault self-test.

Abstract: A deployment unit for use with a handle of a conducted electrical weapon (“CEW”). The deployment unit includes wire-tethered electrodes for launching toward a human or animal target for providing a current through the target to impede locomotion of the target. The deployment unit includes a barrier that prior to use with the handle protects the deployment unit from electrostatic discharge. Prior to use of the deployment unit, the barrier may further protect the deployment unit from ingress of dirt and/or moisture into the deployment unit. While the deployment unit is inserted into a handle, the barrier shields conductors of the handle and the deployment unit to facilitate delivery of a launch signal from the handle to the deployment unit to launch the wire-tethered electrodes.

Abstract: The present invention relates to an arc extinguishing circuit and apparatus which are suitable for extinguishing arc of mechanical switches particularly. A mechanical switch requiring arc extinguishing is connected in series with a load, comprising a first switch, a first charging unit and a first capacitor. The first power supply charges the first capacitor by the first charging unit, and the second power supply supplies power to the load by the first switch and the first capacitor during disconnection of the mechanical switch. The first charging unit is either a first element, or a second switch, or comprising a first element and a second switch connected in series. The present invention has the advantages of high capacitance utilization rate of capacitor and simple circuit.

Abstract: In some examples, a controller circuit comprises: a voltage subtractor circuit having a subtractor output and first and second subtractor inputs, in which the first subtractor input is adapted to be coupled to a first current terminal of a transistor, the second subtractor input is adapted to be coupled to a second current terminal of the transistor; a gate control circuit having a gate control input and a gate control output, the gate control input coupled to the subtractor output, the gate control output adapted to be coupled to a gate of the transistor; and a discharge circuit having a discharge circuit input and a discharge circuit output, the discharge circuit input coupled to the gate control circuit, the discharge circuit output adapted to be coupled to the first current terminal of the transistor.

Abstract: An intelligent electronic device (IED) may obtain a voltage measurement matrix based on an arrangement of a transformer in a power system. The IED may obtain a delta connection compensating angle based on the location of the circuit breaker and the transformer arrangement. The IED may obtain voltage measurements of the transformer. The IED may determine a residual flux value of the transformer based at least in part on the voltage measurements, the voltage measurement matrix and the delta connection compensating angle. The IED may send a signal to a circuit breaker of the transformer to connect the transformer to the power system based at least in part on the system voltage and residual flux value.

Abstract: A system includes a transformer rectifier unit (TRU) including a backfeed sense module. A contactor is operatively connected to the TRU for selectively supplying DC power to a DC bus from the TRU with the contactor closed and isolating the DC bus from the TRU with the contactor opened. A contactor driver is operatively connected to receive a signal from the backfeed sense module and to control opening and closing of the contactor based on the signal. The contactor driver is configured to open the contactor upon receipt of the signal indicative of backfeed detected in the TRU.

Abstract: An arc fault detector includes: a first electric line; a sensor for monitoring an electric current or voltage spectrum in the first electric line and outputting a broadband measurement signal as a monitored signal; a minimum detection unit for detecting a minimum signal value of the monitored signal over a broadband measurement range as a detected minimum signal value; and a controller unit connected to an output of the minimum detection unit, the controller unit comparing the detected minimum signal value with a predefined arc pattern, and outputting a trigger signal on a trigger output if the detected minimum signal value matches the arc pattern.

Abstract: An apparatus includes an absorption circuit, a control circuit and a hot plug line; an input end of the absorption circuit is connected to an input end of the hot plug line, an input end of the control circuit is connected to the input end of the hot plug line, output ends of the absorption circuit and the control circuit are grounded, an output end of the hot plug line is connected to an input end of a sub-node mainboard, and the input end of the hot plug line is connected to a power supply end of a whole cabinet; the absorption circuit includes a first capacitor; in response to the hot plug line being connected to the power supply end of the whole cabinet, the first capacitor is not powered on; in response to the sub-node mainboard being powered on, the first capacitor is powered on.

Abstract: A smart accessory device includes an actuator and is designed to be used to actuate an operating mechanism of a circuit breaker in order to either open or close the separable contacts of the circuit breaker. The accessory can be one of a shunt trip, spring release, or under voltage release device. The actuator includes a solenoid and plunger. The accessory determines the operating condition of the actuator based on how much current flows through the coil when the power source provides power to the accessory device, and continually executes a coil diagnostic to determine the operating condition of the coil while power is being provided to the accessory device. If the accessory fails to trip the circuit breaker when required, the accessory can determine whether the failure was due to either of the solenoid or the plunger.

Abstract: A LCDI power cord circuit is provided. The circuit includes energizing shielded wires and monitoring the energized shields for surges, e.g., arcing, and/or voltage drops, e.g., shield breaks detected by a Power Cord Fault Circuit (PCFC). The PCFC includes one dual purpose amplifying/switch transistor and the LCDI power cord circuit does not include any discrete capacitive components.

Abstract: A plug has a power supply module, a leakage detection module, a timing module, an input terminal for external power supply and an output terminal for outputting voltage, a current loop is formed between the input terminal and the output terminal, the power module is connected to an external power source through the input terminal, the power module includes a rectifier unit D3 and a power control unit, the input of the rectifier unit D3 and the input terminal are electrically connected. The invention has the function of automatically disconnecting the line output when the line has leakage, protecting the plug and the externally connected electrical appliances, and at the same time, it can automatically perform self-checking at regular intervals to check whether the leakage protection function can be used normally, thereby improving the plug's reliability.

Abstract: Disclosed is a two-section conductor type ground fault circuit interrupter with a reverse wiring protection function. A patch key switch is arranged on a PCBA assembly, a conduction spring is mounted between an electric plug bush and the PCBA assembly, and an electronic relay is mounted between an output end of a load copper sheet and the conduction spring. A condition that a metal key is exposed to generate a spark or a metal press piece falls off is avoided, so a two-section conductor structure with the reverse wiring protection function is achieved.

Abstract: Integrated device having GDT and MOV functionalities. In some embodiments, an electrical device can include a first layer and a second layer joined with an interface, with each having an outer surface and an inner surface, such that the inner surfaces of the first and second layers define a sealed chamber therebetween. The electrical device can further include an outer electrode implemented on the outer surface of each of the first and second layers, and an inner electrode implemented on the inner surface of each of the first and second layers. The first layer can include a metal oxide material such that the first outer electrode, the first layer, and the first inner electrode provide a metal oxide varistor (MOV) functionality, and the first inner electrode, the second inner electrode, and the sealed chamber provide a gas discharge tube (GDT) functionality.

Abstract: A method for protecting at least a part of a network segment of an electrical power distribution network has: detecting voltage dips at the intermediate feeding devices of the line arrangements by the voltage dip detection devices; generating and feeding an electrical signal into the line arrangement by the signal generating device at each intermediate feeding device at which one of the voltage dips is detected, the electrical signals having frequencies different from a network frequency of the network segment; receiving the electrical signals via the line arrangements by the receiving devices of the line protection devices; detecting electrical faults on the line arrangement using the electrical signals received by the triggering device of the respective line protection device; and triggering the disconnecting device of the line protection device of the line arrangement, where an electric fault is detected, by the triggering device so that the line arrangement is electrically disconnected from the further el

Abstract: An electrostatic chuck includes a ceramic base, a ceramic dielectric layer, an electrostatic electrode, and a ceramic insulating layer. The ceramic dielectric layer is positioned on the ceramic base and is thinner than the ceramic base. The electrostatic electrode is embedded between the ceramic dielectric layer and the ceramic base. The ceramic insulating layer is positioned on the ceramic dielectric layer and is thinner than the ceramic dielectric layer. The ceramic insulating layer has a higher volume resistivity and withstand voltage than the ceramic dielectric layer, and the ceramic dielectric layer has a higher dielectric constant than the ceramic insulating layer.

Abstract: A control system that detects loosening of a vibrator component in a spreader system. As the vibrator loosens over time, it draws more current. Eventually, this excess current causes the vibrator motor to burn out. The control system detects the loosening of the vibrator to indicate a fault condition by measuring current increase in the vibrator, and then indicating a fault condition that the bolts must be tightened, which results in lowering of the current draw, thereby protecting the vibrator motor from burnout. The system has a “learning mode” capable of establishing and memorizing a baseline of current draw suitable for a vibrator. In this way, a current threshold is exceeded over time, which indicates loosening of the vibrator. The baseline level can be selectively changed adapted with changing conditions, or adapted to other types of systems besides spreader vibrators.