1171results about "Spark gap details" patented technology

A hard disk drive having a housing with a base and a cover connected to each other, a spindle motor connected to the base, a disk mounted on the spindle motor and rotating with respect to the base, and an actuator rotatably connected to the base and supporting a slider with a magnetic head mounted on a front end thereof. The magnetic head writes and / or reads data to and / or from the disk. The hard disk drive also has a blade protruding from a surface of the base and / or a portion of the cover facing the disk. The blade guides an air flow caused by rotation of the disk toward an outer edge of the disk.

An overvoltage protection device for protection of low voltage electrical installations, has a device base part with terminals for phase conductors and ground or neutral conductors and at least one overvoltage protection element, with at least one arrester which is located in a housing. The base part of the device has at least one telecommunications contact which has a switch for remote indication of the state of at least one overvoltage protection element, the base part of the device having plug contacts which are connected to the terminals, and the overvoltage protection element having corresponding connector contacts so that the overvoltage protection element can be plugged onto the base part of the device. The overvoltage protection device is improved by the overvoltage protection element having an optical status display and the optical status display and the switch of the telecommunications contact being actuated via a common mechanical actuating system.

A surge suppressor includes a surge suppression device. A novel current limiting fuse design prevents current flow when the surge suppression device fails. A thermal fusing device is configured to prevent current flow when excessive heat is generated in the surge suppression device. A novel enclosure is used for containing the surge suppression device, over current fuse and thermal fuse.The foregoing and other objects, features and advantages of the invention will become more readily apparent from the following detailed description of a preferred embodiment of the invention which proceeds with reference to the accompanying drawings.

The invention concerns a wind power installation. Such wind power installations of modern type, for example one of type E-40 or E-66 from Enercon are usually equipped with a lightning protection system which is known for example from DE 44 36 197.The present invention assists to minimise the number of interference with the electronic system by virtue of the flash-over effects at the spark path. A wind power installation comprising an arrangement for continuously discharging electrostatic charging of at least one rotor blade of a wind power installation.

A voltage suppression device for suppressing voltage surges in an electrical circuit, comprised of a voltage sensitive element having a predetermined voltage rating, the voltage sensitive element increasing in temperature as voltage applied across the voltage sensitive element exceeds the voltage rating. Terminals are provided for electrically connecting the voltage sensitive element between a power line of an electrical circuit and a ground or neutral line of the electrical circuit. A normally closed, thermal switch is electrically connected in series with the voltage sensitive element between one line of the electrical circuit and the voltage sensitive element, the thermal switch being thermally coupled to the voltage sensitive element wherein the thermal switch moves from a normally closed position to an open position to form a gap between the thermal switch and the voltage sensitive element when the temperature of the voltage sensitive element reaches a level indicating an over-voltage condition. When the thermal switch moves to the open position, residual follow on current is shunted by a fuse element connected in parallel with the thermal switch. Current flows through the fuse element until the fuse element melts. Electrical arcing is contained inside the fuse until extinguished.

An ESD protection device has a structure that allows ESD characteristics to be easily adjusted and stabilized. The ESD protection device includes a ceramic multilayer substrate, at least a pair of discharge electrodes located in the ceramic multilayer substrate and facing each other with a space disposed therebetween, and external electrodes located on a surface of the ceramic multilayer substrate and connected to the discharge electrodes. The ESD protection device includes a supporting electrode disposed in a region that connects the pair of discharge electrodes. The supporting electrode is made of a conductive material coated with an inorganic material having no conductivity.

The invention discloses a thunder-lightening induced solid-phase arc-extinguishing lightning arrester. The thunder-lightening induced solid-phase arc-extinguishing lightning arrester mainly consists of a lightning arrester shell, an arc-extinguishing rotary table, an electric conduction metal plate, a starting rod, a clamping rod, an induction coil, an arc-extinguishing barrel and a counting pointer; the arc-extinguishing rotary table is arranged inside the lightning arrester shell, and a flat spiral spring for pushing the arc-extinguishing rotary table to rotate is arranged at the central position of the arc-extinguishing rotary table; the electric conduction metal plate is arranged at the upper part of the arc-extinguishing rotary table; the arc-extinguishing rotary table is provided with a plurality of arc-extinguishing gas pills in the peripheral direction; one side of each arc-extinguishing gas pill is provided with a trigger electrode and a groove respectively, one end of each trigger electrode is connected with one of trigger ends of the corresponding arc-extinguishing gas pill through a lead, and the other ends of the trigger electrodes extend out of the edge of the arc-extinguishing rotary table; and the other of the trigger ends of the corresponding arc-extinguishing gas pill is connected with the electric conduction metal plate through a lead. The thunder-lightening induced solid-phase arc-extinguishing lightning arrester is simple in structure, reasonable in design, high in arc-extinguishing ability and stable and reliable to work, and the arc-extinguishing gas pills are changed quickly and conveniently.

An arc containment device is presented. The arc containment device includes a shock shield further having a multiple apertures for escape of gas, the shock shield configured to surround an arc source. The device further comprises an inner enclosure having a multiple openings generally aligned with the multiple apertures, the inner enclosure configured to provide an electrical insulation base for the arc source. An outer enclosure disposed is provided around the inner enclosure, the outer enclosure configured to direct the gas to the environment outside the device.

A different-voltage-class subsection arc-extinguishing anti-thunder gap device comprises an arc-extinguishing device and a protective gap device which is arranged nearby an insulator chain in parallel. The protective gap device is mainly composed of a low-voltage end electrode and a high-voltage end electrode; the arc-extinguishing device comprises an arc-extinguishing cylinder and an arc-extinguishing projectile storage bin I in a disc shape, wherein a trigger coil, a trigger electrode, a projectile trigger position, arc-extinguishing projectiles and a plane scroll spring are arranged inside the arc-extinguishing projectile storage bin I; one end of the trigger electrode is connected with the trigger coil, and the other end of the trigger electrode extends to the projectile trigger position and is connected with the arc-extinguishing projectiles; the plane scroll spring is arranged at the center of the arc-extinguishing projectile storage bin I; the arc-extinguishing projectiles are arranged in a projectile storage rail of the arc-extinguishing projectile storage bin I; one end of the low-voltage end electrode is arranged on a pole and tower cross arm through a connection hardware fitting, and the other end of the low-voltage end electrode is arranged in the trigger coil of the arc-extinguishing device; one end of the high-voltage end electrode is arranged on an overhead conductor, and the other end of the high-voltage end electrode points to the low-voltage end electrode. The different-voltage-class subsection arc-extinguishing anti-thunder gap device is easy to install and replace, long in service life, and capable of greatly improving stability of an electrical power system.

A spark plug, a center electrode therefore and method of construction is provided. The spark plug has a generally annular ceramic insulator extending between a terminal end and a nose end. A conductive shell surrounds at least a portion of the ceramic insulator and a ground electrode having a ground electrode sparking surface is operatively attached to the shell. An elongate center electrode has a body extending between opposite ends, wherein the body is compacted and sintered of a conductive or semi-conductive ceramic material. One of the electrode ends provides a center electrode sparking surface to provide a spark gap between the center electrode sparking surface and the ground electrode sparking surface.

A device for protecting an electrical system against surge voltages, comprising one or more protection components (10), means (20) for disconnecting the protection component (10) and means (30) for visually indicating the state of the component (10), operationally connected to the disconnection means (20) and comprising at least one control part (40) and at least one means (50) for indicating the state of the protection component (10), combined with the control part (40), whereby the relative arrangement of the control part (40) and the disconnection means (20) is such that, when the disconnection means are opened (20), the disconnection means release the control part (40), thereby allowing the control part to move.

The invention discloses a multi-channel gas spark switch. Two main electrodes (5) are arranged inside a shell body, a trigger electrode (6) is arranged between the two main electrodes (5), screw holes are evenly distributed in the side face of the trigger electrode (6), a blind hole with a smaller hole diameter is formed in the front end of the trigger electrode (6), a needle electrode is arranged in the blind hole, and spraying holes which are communicated with the bottom of the blind hole are formed in an end face of the trigger electrode (6). The inner portion of the blind hole is used as a plasma spraying cavity, the needle electrode and the trigger electrode (6) in the plasma spraying cavity discharge to generate plasma in the plasma spraying cavity, and the plasma can enter one spark gap through the spraying holes. According to the multi-channel gas spark switch, the plasma spraying technology is used as a gas switch trigger method, discharge delayed time is reduced, multi-channel discharge is caused to occur on the peripheries of the plurality of spraying holes, spark inductance caused by discharge is reduced, the service life of the switch is prolonged, the switch can work under a low working voltage condition, and the high trigger characteristics are ensured.

A modular overvoltage protection unit for electrically connecting a first power line and / or a second power line to a protected earth (PE) line in the case of an overvoltage event on the first or second power line includes a unit enclosure defining an enclosure cavity, and first and second surge protection devices (SPDs) each disposed in the enclosure cavity. Each of the first and second SPDs includes: a first electrode in the form of a metal housing defining a housing cavity; a second electrode disposed within the housing cavity; and a varistor member captured between and electrically connected with each of the first and second electrodes, wherein the varistor member is formed of a varistor material. The overvoltage protection unit further includes: a first line terminal to connect the first power line to the overvoltage protection unit, wherein the first line terminal is electrically connected to the second electrode of the first SPD; a second line terminal to connect the second power line to the overvoltage protection unit, wherein the second line terminal is electrically connected to the second electrode of the second SPD; and a PE terminal to connect the PE line to the overvoltage protection unit, wherein the PE terminal is electrically connected to the metal housing of the second SPD. The metal housing of the first SPD is electrically connected to the PE terminal through the metal housing of the second SPD.

An overvoltage protection device includes first and second electrically conductive electrode members and a varistor member formed of a varistor material and electrically connected with each of the first and second electrode members. The overvoltage protection device has an integral fail-safe mechanism operative to electrically short circuit the first and second electrode members about the varistor member by fusing first and second metal surfaces in the overvoltage protection device to one another using an electric arc.

An ESD protection device is manufactured such that its ESD characteristics are easily adjusted and stabilized. The ESD protection device includes an insulating substrate, a cavity provided in the insulating substrate, at least one pair of discharge electrodes each including an exposed portion that is exposed in the cavity, and external electrodes provided on a surface of the insulating substrate and connected to the discharge electrodes. Supporting electrodes obtained by dispersing conductive powder in an insulating material defining the insulating substrate are provided along a bottom surface and a top surface that define the cavity between the exposed portions of the at least one pair of discharge electrodes.

A disconnector assembly for an arrester includes a housing having first and second opposite ends. A cavity is disposed within the housing. A first electrical terminal is disposed at the first end of the housing, and a second electrical terminal is disposed at the second end of the housing. A cartridge with an explosive charge disposed in the cavity between the first and second electrical terminals. The cartridge has a powder load greater than 0 grams and not greater than approximately 0.15 grams. The powder load is sufficient to separate said second electrical terminal from said first electrical terminal upon cartridge detonation while minimizing the intensity of the explosive separation upon unintended cartridge detonation.

A device for protecting an electrical system against surge voltages, comprising one or more protection components provided with means for connecting same with said system and means for disconnecting said component from said system, characterised in that it comprises arc-breaking means for preventing the generation of electric arcs between the disconnection means and the connection means when the disconnection means is in an open state, wherein said arc-breaking means consist of an insulating flap capable of moving within the gap and comprising a central portion to be positioned between the disconnection and connection means, and side portions shaped in such a way as to prevent the electric arc from bypassing the arc-breaking means. Electrical surge voltage protection devices are also described.

The invention relates to a lightning protection device for electric equipment, in particular to a gas arc extinguishing device for electric equipment of various voltage levels. The gas arc extinguishing device for electric power equipment includes a grounding gap, a high voltage gap, a lightning signal detector, a signal transmission circuit, an arc extinguishing gas pill shell, an arc extinguishing gas pill and other components. The arc extinguishing gas pill and the arc extinguishing gas pill shell are installed near the high voltage gap or the ground gap. The lightning signal detector generates a trigger signal after the lightning current passes, and transmits the trigger signal to the arc extinguishing gas pill through the signal transmission circuit and the metal electrode sheet of the arc extinguishing gas pill, and the arc extinguishing gas pill generates an air flow sufficient to blow out the arc. The number of arc extinguishing gas pills determines the number of actions of the gas arc extinguishing device. The invention can quickly extinguish the electric arc, improve the success rate of reclosing, and is beneficial to improve the reliability of lightning protection of electric equipment.

A voltage suppression device for suppressing voltage surges in an electrical circuit, comprised of a voltage sensitive element having a predetermined voltage rating, the voltage sensitive element increasing in temperature as voltage applied across the voltage sensitive element exceeds the voltage rating. Terminals are provided for electrically connecting the voltage sensitive element between a power line of an electrical circuit and a ground or neutral line of the electrical circuit. A normally closed, thermal switch is electrically connected in series with the voltage sensitive element between the power line and the voltage sensitive element, the thermal switch being thermally coupled to the voltage sensitive element wherein the thermal switch moves from a normally closed position to an open position to form a gap between the thermal switch and the voltage sensitive element when the temperature of the voltage sensitive element reaches a level indicating an over-voltage condition. A non-conductive barrier that is operable to move into the gap when the thermal switch moves to an open position, the barrier preventing line voltage surges from arcing between the thermal switch and the voltage sensitive element.

A discharge tube 10 formed by forming an airtight envelope 16 by hermetically sealing openings at both ends of a case member 12 made of an insulating material opened at both ends with a pair of cap members 14, 14 that double a discharge electrode, forming a predetermined discharge gap 22 between discharge electrode portions 18, 18 of the cap members 14, 14, forming on an inner wall surface 24 of the case members 12 a plurality of linear triggering discharge films 28 of which both ends are disposed separated by a small discharge gap 26 opposite to the cap members 14, 14 that double a discharge electrode, forming on a surface of the discharge electrode portion 18 a film 30 containing an alkali iodide, and encapsulating a discharge gas containing Kr (krypton) in the airtight envelope 16.

A device for protecting an electrical system against surge voltages, comprising one or more protection components (10), means (20) for disconnecting the protection component (10) and means (30) for visually indicating the state of the component (10), operationally connected to the disconnection means (20) and comprising at least one control part (40) and at least one means (50) for indicating the state of the protection component (10), combined with the control part (40), whereby the relative arrangement of the control part (40) and the disconnection means (20) is such that, when the disconnection means are opened (20), the disconnection means release the control part (40), thereby allowing the control part to move.

An explosion-proof and flameproof pullout safety surge-absorbing module includes a surge-absorbing unit, a protective unit, a function member, and a hot melt component. The unit has a body defining an electrode side. The middle section of electrode side defines a partially exposed electrode side further connected to a first pin. The protective component includes a base and a top cover conjoint to the base. The body is between the base and the top cover. The function member includes a recovery component and a function part. The recovery component is flexible, of which one terminal connects the base and the other terminal connects the function part pivoting onto the base and working in a first state and a second state. In the first state, one terminal of the function part is connected to the partially exposed electrode side; in the second state, the hot melt component is heated and melt.

The invention discloses a gas injection type parallel gap device. The protection device belongs to the field of lightening protection gap for power transmission lines of alternating-current and direct-current electric power systems. The device is connected with the two ends of a power transmission line insulator chain in parallel, under a lightening stroke, the device is broken down before the insulator chain can be broken down, and thus the insulator chain and the corresponding power transmission line can be protected; moreover, a high-speed high-voltage gas flow can be generated fast and acts on arcs to restrain formation and development of the arcs, the arcs are extinguished in a transient state, and thus the lightning trip-out rate and the lightening accident rate of an electric power system are reduced. The gas injection type parallel gap device comprises arc-control devices on the grounding side and the wire side, fixing devices and parallel spiral fittings installed at the two ends of the insulator train of the line. The arc-control device on the grounding side and the arc-control device on the wire side respectively comprise an arc extinguishing powder storage chamber, an arc air-termination ring, an insulating gas generation chamber, an arc spray channel and the like. With the device, the stability of the electric power system is improved, the on-load action frequency of a breaker is effectively reduced, the service life of electric power equipment such as a transformer is prolonged, and production, operation and maintenance cost is very low.