Abstract: The switching valve of a quick-operating slider system is an electrically operated stop valve. In the case of a required rapid shutoff, the coil (19) must be de-energized in a very short period of time in order to allow the switching valve (18) to open. For this purpose, a voltage-dependent resistor (33) is provided between the voltage source (25) and the coil (19), said resistor (33) having a high resistance below a switching voltage (Us), but a negligibly small resistance above the switching voltage. An auxiliary voltage source (35) is connected in parallel to the coil (19), the voltage of said auxiliary voltage source (35) being opposite to that of the voltage source (25). In this manner, the switching valve is rapidly opened both when a corresponding signal is received and in the case of power failure.

Abstract: An exemplary backlight control circuit includes a load (250), an inverter circuit (230), a pulse width modulation integrated circuit (PWM IC) (210), a protecting circuit (270), and a feedback circuit (240). The load (250) includes two backlight lamps (251, 252) with first terminals (241). The PWM IC with a protecting output (215) is connected to the load via the inverter circuit. The protecting circuit has a reference voltage. The first feedback circuit is capable of outputting a voltage to the protecting circuit corresponding to the voltage detected from the first terminals. The protecting circuit is configured to control the PWM IC to stop outputting a backlight adjusting signal to the inverter circuit such that the inverter circuit stops driving the load when the output voltage is higher than the reference voltage of the protecting circuit.

Abstract: A device for protecting sensitive electronic equipment from low level signal lines short circuited to high voltage power sources includes a switch that open the circuit between the data lines and the sensitive computing equipment if a high voltage condition is detected on the data lines. Otherwise, the switch remains closed and data can be transmitted to the computing equipment.

Abstract: Methods and apparatus for over-voltage protection of device inputs are disclosed. An example apparatus to protect a device from an over-voltage condition disclosed herein comprises a switch coupled between a device input and at least one component of the device, and a voltage compensator to pull a control input of the switch to a voltage associated with the device input to open the switch to protect the device component from the over-voltage condition.

Abstract: A voltage surge protection device comprising a disconnection device with electric contacts said disconnection device comprising a first connecting electrode electrically connected with a first connecting strip, a second connecting electrode electrically connected with a second connecting strip, and a third switching electrode electrically connected to the second connecting strip. The protection device comprises a surge arrestor connected in series with a thermal disconnector between the third movable arc switching electrode and the second connecting strip. Said thermal disconnector comprises at least one fuse element extending between a first and second conducting radial wall of an arc extinguishing chamber, said arc extinguishing chamber comprising at least one conducting separator.

Abstract: A technique that minimizes false triggering of an electrostatic discharge (ESD) protection circuit is disclosed. In an embodiment, the resistor-capacitor (RC) time constant of an ESD trigger element is reduced during normal operation minimizing the risk of false triggering. Circuit layout area is saved without the need of a timeout circuit associated with releasing a device maintaining a trigger state (i.e., a trigger latch). A RC time constant for triggering is set in an operational context according to conditions of usage and desired application of the ESD protection circuit.

Abstract: A safety device for disabling a positive pressure radiant tube heater upon failure of the heat exchanger and a corresponding method are described. This invention relates to the ability to detect a condition where a failure of the heat exchanger triggers the safety device and disables the heater. The safety device includes a low melt wire; an insulating sleeve positioned about the low melt wire, the wire and sleeve positioned on top of the reflector, a tension device to maintain the wire under tension; and a control device to disable the heater if the wire is discontinuous.

Abstract: An object is providing an electrostatic attraction apparatus and an attracting/releasing method capable of reliably attracting and quickly releasing a glass substrate. An attraction force for attracting a glass substrate is obtained according to the physical properties of the glass substrate. In addition to obtaining an attraction voltage (Vc(t)) required for obtaining the attraction force, a holding voltage (Vh(t)) for holding an attraction state and a release voltage (Vr(t)) for releasing the glass substrate are also obtained (S1 to S7). Attraction time period (tc) is actually measured and if this measured time is different from a preset attraction time (t1), the holding voltage (Vh(t)) and the release voltage (Vr(t)) are recalculated according to the actually measured attraction time period (tc) (S8 to S11).

Abstract: A power distribution system that can be used in naval ships and submarines includes a first power generation system including at least one power source for supplying power to a first service distribution system that includes at least one dc distribution busbar for carrying a distribution voltage and a distribution current and at least one switchboard that includes protective switchgear with contacts. A zonal power distribution sub-system includes a zonal power supply unit for supplying power to at least one electrical load and a zonal energy store connected to the at least one switchboard of the first service distribution system for supplying power to the zonal power supply unit. The at least one power source is regulated according to a power source foldback and stabilizing characteristic and a power source starting characteristic. The at least one electrical load is regulated according to a load shedding and stabilizing characteristic.

Abstract: A Coulombic electrostatic chuck is disclosed which includes a substrate, a conductive layer overlying the substrate, and an arc elimination layer overlying the conductive layer. The electrostatic chuck further includes a high-k dielectric layer overlying the arc elimination layer, wherein the high-k dielectric layer has a dielectric constant of not less than about 10 and a resistivity of not less than about 1011 Ohm-cm.

Abstract: An electrostatic discharge protection circuit (ESD protection circuit) provides ESD protection to all NMOS/PMOS transistors that are connected to the pins of a CMOS integrated circuit (IC). The ESD protection circuit will protect the CMOS IC against an ESD event, regardless of whether the CMOS IC is powered up, or powered down.

Abstract: A group protection module for a switchgear arrangement is provided in order to protect a group of load feeders, each having a contactor for connecting or disconnecting a respective load. The group protection module has a circuit breaker for providing short-circuit protection, said circuit breaker being connected to a supply-side input and to a load-side output of the group protection module for connection to a power supply system and for connecting the group of load feeders. The group protection module has a safety evaluation unit via which the circuit breaker can be tripped if a status signal detectable by the respective load feeders indicates that one of the contactors of the load feeders can no longer be de-energized. The group protection module is implemented as a constructional unit.

Abstract: An electronic trip unit which includes a processing unit and a comparator circuit. The processing unit receives an input voltage, and a reset signal to reset the electronic trip unit, and generates a trip signal when sensed current of the electronic trip unit exceeds a predetermined threshold. The comparator circuit includes a first comparator which receives the trip signal from the processing unit and compares the trip signal with a predetermined reference voltage determined based on the reset signal, and a second comparator which compares a voltage generated by a power supply with the predetermined reference voltage. The comparator circuit determines whether the trip signal is for a valid trip event based comparison results of the first comparator and the second comparator.

Abstract: An antistatic apparatus selectively coupled to an electrical component having a first end and a second end is proposed in the invention. The antistatic apparatus includes a first soldering portion, a second soldering portion, a first discharging portion and a second discharging portion. The first soldering portion selectively connected to the first end of the electrical component. The second soldering portion selectively connected to the second end of the electrical component. The first discharging portion connected to the first soldering portion and rotated clockwise for an angle. The second discharging portion connected to the second soldering portion and rotated counter-clockwise for the angle to provide a discharge path corresponding to the first discharging portion, electrostatic current of the first soldering portion being discharged into the second soldering portion through the discharge path.

Abstract: The switching control circuit comprises a switching control signal generation circuit that detects a change in ripples of the output voltage and-generates a switching control signal for the on/off control of the switching element to make the output voltage follow the target level; an overcurrent state detection circuit that generates a state signal indicating whether the output current is in an overcurrent state where the output current is equal to or greater than a predetermined current; and a delay circuit that delays the state signal for a same predetermined delay time at both of the times when the output current exceeds the predetermined current and when the output current falls below the predetermined current.

Abstract: A ground detection apparatus for use in a power generating system including an excitation circuit and a driven rotatable shaft. A ground detector ring is disposed on the rotatable shaft of the power generating system. A ground detection transmitter is mounted on the ground detector ring and in electrical communication with the excitation circuit of the power generating system. The ground detection transmitter is utilized to detect ground faults in the excitation circuit of the power generating system and to send a signal associated with ground faults detected by the ground detection transmitter. A ground detection receiver is associated with a stationary portion of the power generation system and is in communication with the ground detection transmitter for receiving the signal associated with ground faults detected and sent by the ground detection transmitter.

Abstract: An electrostatic discharge protection circuit device includes a discharge circuit, a trigger circuit and a trigger control circuit. The discharge circuit is connected to a predetermined circuit node of a semiconductor device, and makes discharge when surge voltage is applied to the circuit node. The trigger circuit triggers the discharge circuit to start a discharge operation by the discharge circuit. The trigger control circuit controls a trigger voltage at which the trigger circuit starts a discharge operation by the discharge circuit.

Abstract: An electrostatic chuck is provided for a substrate stage that can be used in plasma treatment of various substrates such as a large-sized glass substrate for a flat panel display (FPD), a semiconductor wafer or the like. The electrostatic chuck is divided into a plurality of electrodes formed into nearly bar-like shapes. In accordance with an exemplary embodiment, each of the divided bar-like electrodes includes an inner electrode and a single layer thermally sprayed film formed on the surface of the inner electrode, with the bar-like electrodes disposed in parallel so as to form a plane electrode.

Abstract: A travel outlet device is for connecting between an adapter and a power cable. The travel outlet device includes a case, a PCB and at least one power outlet unit. The case is connected with a power input portion and a power output portion. The PCB has a surge-protected circuit and is disposed inside the case. The PCB is electrically connected with the power input portion and the power output portion. The power outlet unit is disposed with the case and electrically connected with the PCB. Accordingly, the travel outlet device can provide the adapter surge-protected function so that users can get more power outlet units to connect to other electric equipments for convenient use.

Abstract: Apparatus for testing an opto-switch includes a first sense resistor coupled between a power source and an input of the opto-switch, and a second sense resistor coupled to an output of the opto-switch. A test circuit is coupled to sense a first current flowing through the first sense resistor and a second current flowing through the second sense resistor and to generate a test signal responsively to a relation between the first and second currents. A controller is coupled to receive the test signal and to perform a protective action when the test signal exceeds a predetermined limit.