EP0199668B1 - Strombegrenzende Schalteinheit mit einer Kontaktbrückenanordnung - Google Patents

Strombegrenzende Schalteinheit mit einer Kontaktbrückenanordnung Download PDF

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Publication number
EP0199668B1
EP0199668B1 EP86730061A EP86730061A EP0199668B1 EP 0199668 B1 EP0199668 B1 EP 0199668B1 EP 86730061 A EP86730061 A EP 86730061A EP 86730061 A EP86730061 A EP 86730061A EP 0199668 B1 EP0199668 B1 EP 0199668B1
Authority
EP
European Patent Office
Prior art keywords
contact
arrangement
carrier
switch unit
force
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86730061A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0199668A2 (de
EP0199668A3 (en
Inventor
John M. Brown
David P. Mcclellan
Gustave E. Heberlein, Jr.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0199668A2 publication Critical patent/EP0199668A2/de
Publication of EP0199668A3 publication Critical patent/EP0199668A3/de
Application granted granted Critical
Publication of EP0199668B1 publication Critical patent/EP0199668B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2083—Bridging contact surfaces directed at an oblique angle with respect to the movement of the bridge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H01H73/045—Bridging contacts

Definitions

  • a current-limiting switching unit with these features has become known from EP-A-0 021 882.
  • the device for abrupt reduction of the pretensioning force acting on the contact bridge has two pawls under the action of a spring force, which in the rest state rest against work surfaces of a driver which can be moved by a drive mechanism. If the contact bridge is lifted out of the closed position under the influence of an electrodynamic force, this occurs with displacement against the force of a spring, with guide parts of the contact bridge abutting the pawls and release them from their locked position. In the following, the contact bridge can move freely into its open position under the influence of the aforementioned electrodynamic force.
  • the additionally provided magnetic armature arrangement acts in such a way that an opening force dependent on the current also acts on the contact bridge.
  • the force emanating from the armature arrangement thus likewise causes the contact bridge to be displaced counter to the spring force acting on the contact bridge and thus likewise actuates the pawls.
  • the known current-limiting switching unit has the property that the sudden opening of the contact bridge begins at a certain opening path of the contact bridge after being lifted out of its closed position under the influence of electrodynamic and / or electromagnetic forces.
  • the greater the lifting forces the greater the friction of the pawls on their counter surfaces. Pawls and counter surfaces are also subject to wear.
  • EP-A-0 072 285 Another known current-limiting switching unit (EP-A-0 072 285) has a ball lock instead of pawls. Two balls are located in a cage connected to the contact bridge, while the outer ball parts engage in recesses in spring-loaded tongues. This arrangement also has the property of an abrupt release of the contact bridge as soon as the opening forces acting on the contact bridge exceed a certain size. Compared to a device with pawls of the type previously discussed, a lower frictional force is to be expected when using balls, the size of which, however, can also vary depending on the size of the forces occurring.
  • the invention is based on the object of designing the current-limiting switching unit in such a way that it maintains a sufficient contact force in the closed state both on overcurrents of relatively low level and on overcurrents of high level responds quickly and that the response limit of the switching unit remains largely unchanged over the life of the device.
  • the carrier rollers In conjunction with the cam surfaces, the carrier rollers form a practically wear-free device with a pronounced threshold value of the response force.
  • the magnetic armature arrangement interacts with the roller arrangement in such a way that it does not simply increase the lifting force acting on the contact bridge, but rather reduces the pretensioning force with which the carrier rollers bear against the cam surfaces. Due to the position of the axis of rotation of the armature arrangement, a force transmission is effective, which allows relatively low magnetic forces to be used to influence the current-limiting shutdown. In this way, a current-limiting switching unit is created which responds equally to low and high overcurrents and which retains its current-limiting properties essentially unchanged.
  • An advantageous mechanical structure of the switching unit can be achieved according to a development of the invention in that two support rollers are provided which engage the contact carrier in a symmetrical arrangement and are each mounted on a roller shaft, the roller shafts in recesses in a support frame transverse to the direction of movement of the contact bridge arrangement when Opening and closing are slidably guided and biased against each other by two helical tension springs arranged symmetrically on both sides of the carrier rollers.
  • Such a symmetrical arrangement has a favorable effect on the course of movement because tilting is avoided.
  • a spring acting in the direction of the closed position of the contact can be arranged between a housing of the switching unit and the contact bridge arrangement. In this way, a restoring force is also provided in the event that the aforementioned second cam surface is designed with very little or no inclination to the direction of movement of the contact bridge arrangement.
  • At least one spacer block can be arranged in the housing of the switching unit, which has a groove for guiding the contact carrier and sections which encompass the armature arrangement at a distance, one of which is located between the contact carrier and the armature arrangement.
  • the spacing block thus performs the functions of guiding and protecting components of the switching unit.
  • FIG. 1 shows a current-limiting switching unit in a longitudinal section.
  • FIG. 2 is a longitudinal section essentially along the line II-II in FIG. 1, for a more precise illustration of certain components.
  • FIG. 3 is a section essentially along the line III-III in FIG. 1 for a more precise illustration of further components.
  • FIG. 4 is a perspective view of a contact carrier arrangement in an isometric illustration.
  • FIG. 5 is a perspective view of a fixed contact arrangement in an isometric view.
  • FIG. 6 shows a longitudinal section of the fixed contact arrangement along the line VI-VI in FIG. 5.
  • FIG. 7 is a cross section along the line VII-VII in FIG. 6.
  • Figure 8 is a top view of an input arm of the fixed contact assembly.
  • FIG. 9 shows a side view of the input arm according to FIG. 8.
  • Figure 10 is a top view of an output arm of the fixed contact assembly.
  • FIG. 11 shows a side view of the output arm of the fixed contact arrangement according to FIG. 10.
  • FIG. 1 shows a current-limiting switching unit 10 which can be designed as an integral part of a low-voltage circuit breaker or which can form a unit which can be attached to an existing low-voltage circuit breaker in order to increase the breaking capacity of the circuit breaker.
  • the current-limiting switching unit 10 contains a fixed contact arrangement 12, a movable contact bridge arrangement 14 with a contact bridge 15 and a carrier arrangement 16.
  • a double arrow 17 denotes the direction of movement of the contact bridge 15 when opening and closing.
  • An arc chamber 18 serves to extinguish the arc in a known manner.
  • the carrier arrangement 16 exerts a closing force on the contact bridge arrangement 14 in order to bring the movable and stationary contacts into their closed position, in which the contacts touch one another.
  • armature arrangements 36 and 38 reduce the biasing force of the carrier arrangement 16 acting on the contact bridge arrangement and enable quick and reliable opening.
  • the contacts are separated by forces that occur directly on the contacts. The arcs that occur when the contacts are separated are conducted into the arc chamber 18 and extinguished there.
  • the fixed contact arrangement 12 contains an input arm 20, an output arm 22, an input contact 24, which is attached to the end of the input arm 20, and an output contact 26, which is attached to the end of the output arm 22.
  • the input arm and the output arm are encased in an encapsulation material 28 that electrically isolates the contact arms from each other.
  • a first magnet part 30 and a second magnet part 32 are embedded in the encapsulation material, which are insulated from one another and from each of the contact arms by the encapsulation material 28.
  • the first magnetic part 30 is preferably arranged between the input arm 20 and the output arm (22) and is located centrally between them, so that it is located between the input contact 24 and the output contact 26, which project out of the encapsulation material 28 for proper contact with the contact bridge arrangement 14 are arranged. An edge or surface of the magnetic part 30 protrudes through the encapsulation material 28. If the second magnetic part 32 is also used, it is preferably arranged below the input arm 20. The second magnet part 32 receives its place on the bottom of the fixed contact arrangement 12.
  • the output arm 22 has an opening 34 of a size sufficient to accommodate a part of the input arm 20.
  • the output contact 26 is attached to one end of the contact arm 22, while the other end of the contact arm 22 one for connection to the circuit breaker by means of a flexible conductor or other means suitable design.
  • the end of the output arm 22 to which the output contact 26 is attached extends upwards at an angle. With this arrangement, the contact 26 protrudes from the encapsulation material 28 in the installed state.
  • the input contact 24 is attached to one end of the input arm 20.
  • the other end of the input arm is designed for connection to an input line.
  • the entry arm is formed from a flat piece of metal and has three bends. The first bend extends downward from the horizontal, the second bend returns the metal to the horizontal position, and the third bend extends the metal upward so that the contact 24 is approximately on the same horizontal plane as the connector portion of the contact arm 20.
  • the three bends divide the contact arm 20 into two sections, namely a horizontal connecting section and a substantially U-shaped section, on one leg of which the input contact 24 is fastened.
  • the section of the input arm 20 having this contact 24 is narrower than the rest of the input arm.
  • the switching unit 10 has a first magnetic armature arrangement 36 and a second magnetic armature arrangement 38 which are connected at one end to the carrier arrangement 16, the other end extending downwards in the vicinity of the fixed contact arrangement 12.
  • Each of the magnetic armature arrangements 36 and 38 has a leaf spring 40 or 42, which is provided for biasing the armature arms in the direction of the fixed contact arrangement 12.
  • the free end of each armature assembly extends in the vicinity of the magnetic parts 30 and 32 of the fixed contact assembly 12.
  • there is a magnetic field in the vicinity of these magnetic parts during an overcurrent This magnetic field attracts the free end of each armature assembly towards the fixed contact assembly 12, which, as will be explained in detail, reduces the closing force and thereby enables the contacts to open more quickly under the influence of relatively low overcurrents.
  • FIGS. 3 and 4 show that the contact carrier arrangement 16 has a contact carrier 44 which is gripped by carrier rollers 46 and 48 which are supported by roller shafts 50 and 52, respectively.
  • the ends of the roller shafts are guided in elongated holes 55 of a support frame 54 so that they can be displaced transversely to the direction of movement of the contact bridge 15 and its contact carrier 44 (arrow 17).
  • the support frame 54 is formed from a steel part such that the central part of the metal has a U-shaped configuration, with feet extending from the legs of the "U" for anchoring the support frame to the housing 11 of the switching unit 10 or a circuit breaker.
  • the support frame 54 has an opening in the bottom of the U-shaped part of such a size and design that it is sufficient to receive the contact carrier 44.
  • the support frame 54 also has slots 55 or other openings in the legs of the U-shaped part of such size and design that they are sufficient to receive the ends of the roller shafts 50 and 52.
  • the carrier rollers 46 and 48 are attached centrally to the roller shafts 50 and 52. In a symmetrical arrangement on both sides of the support rollers 46 and 48, the roller shafts 50 and 52 are prestressed against one another by coil tension springs 56 and 58.
  • the contact carrier 44 is located between the carrier rollers 46 and 48 and is under the action of the tension springs 56 and 58, which the carrier rollers 46 and 48 strive to pull towards each other.
  • the contact carrier 44 has a first cam surface 60 and a second cam surface 62.
  • the cam surfaces 60 and 62 are inclined to different degrees inwards to the direction of movement (arrow 17) of the contact carrier 44 such that the carrier rollers 46 and 48 take the smallest distance from each other when the contacts are in the closed position shown in the figure.
  • the carrier rollers 46 and 48 are removed from each other when the contacts move to the open position.
  • the carrier rollers 46 and 48 bear against the cam surfaces 60 with the greater inclination and exert the required contact force on the contact carrier 44.
  • the contact carrier 44 In the open position, the contact carrier 44 is displaced vertically upward in the drawing to such an extent that the carrier rollers 46 and 48 bear against the respectively assigned second cam surface 62. In this position of the parts, only a very slight force is exerted on the contact carrier in the direction of the closed position due to the lower inclination of the cam surfaces 62. The reduction of the force effect on the contact carrier 44 happens abruptly when the carrier rollers 46 and 48 cross the transition region between the cam surfaces 60 and 62.
  • the second cam surface 62 can be vertical, i. H. can be arranged without inclination to the direction of movement of the contact bridge 15.
  • the contact carrier 44 can have a recess 64 for the engagement of a return spring 66, which is arranged between the contact carrier 44 and the housing 11 of the switching unit.
  • This spring can be used optionally and is useful for providing a restoring force on the contact carrier 44 after the contacts have opened due to an overcurrent.
  • the spring can be used to supplement the force generated by the carrier rollers and the second cam surfaces 62, or it can be used alone in cases where the cam surfaces 62 are designed without inclination to the direction of movement.
  • the spring 66 ensures that the pretensioning force in the closing direction is present regardless of influences such as dirt, foreign bodies or other causes.
  • Each of the armature arrangements 36 and 38 extends with its free end into the area of the fixed contact arrangement 12 and is attracted by the magnetic parts 30 and 32 due to overcurrents.
  • Both anchor assemblies are formed by a flat steel part that is bent at two points to form a stepped shape at one end.
  • the free end of each armature arrangement can be provided with an extension piece 37 or 39 in order to improve the response to the magnetic field formed by the magnetic parts 30 and 32.
  • the anchor arrangements are angled twice in opposite directions, the first angle pointing towards the center line of the arrangement.
  • the upward end portion 36a or 38a of each anchor assembly is bifurcated by a groove.
  • a groove 36b can be seen in FIG.
  • each anchor arrangement overlaps the associated support roller 46 and 48.
  • the helical tension springs 56 and 58 are positioned next to the fork prongs of the end sections 36a and 38a.
  • each bifurcated end section 36a and 38a engages behind the associated roller shaft 50 or 52 created the possibility that each anchor arrangement due to its cutting-like mounting on the support frame 54 near the associated support roller can lift the latter from the contact carrier or reduce the force acting on the contact carrier 44. Since the armature arrangements 36 and 38 in connection with the magnet parts 30 and 32 already respond to overcurrents of relatively low levels, a rapid contact opening is ensured even with such overcurrents.
  • left and right spacer blocks 68 and 70 are arranged in the housing 11 of the switching unit 10, which are made of a solid insulating material, for. B. are made of polyester resin with glass fiber reinforcement and act as guide parts for the contact carrier 44 during the opening and closing movement and to maintain the separation between the magnetic parts 30 and 32 and the armature arrangements 36 and 38.
  • the spacing blocks 68 and 70 are the same, but only the left block 68 will be described for ease of description.
  • the spacer block 68 has essentially the cross-sectional shape of an I, similar to the cross-sectional shape of an I-steel.
  • the head and foot legs of the I are the same, but the vertical middle part of the I is shifted to the right, so that the space remaining between the head and foot legs is larger on the left side than on the opposite side. Furthermore, the right side of the middle part a groove 69.
  • the spacer block 68 is arranged in the housing of the switching unit 10 between the armature arrangement 36 and the contact carrier 44, so that the contact carrier 44 can slide in the groove 69 of the spacer block 68. In this way, the groove 69 guides the contact carrier 44 during its upward and downward movement when opening and closing.
  • the armature arrangement 36 extends through the space between the wall of the housing 11 of the switching unit 10 and the vertical middle part of the I-shape. This area can be viewed as a large groove which guides the armature arrangement laterally and which has the further important function of preventing the armature from contacting the magnet parts 30 and 32. These functions are important because the contact carrier 44 is made as a relatively thin metal part that can be tilted when it comes into contact with the rollers, which would greatly change the opening and closing characteristics of the switch.
  • the spacer block 68 or 70 thus represents a means for guiding the contact carrier 44, and thereby improves the response accuracy of the switching unit.
  • the force exerted by the coil springs 56 and 58 tends to pull the carrier rollers 46 and 48 towards the center line of the carrier assembly 16. Since the armature assemblies 36 and 38 are engaged with the roller shafts 50 and 52, a force acts on each armature assembly which tends to pull the bifurcated end 36a and 38a toward the center of the support assembly. This force is noticeable due to the cutting-like mounting of the armature arrangements below the bifurcated end sections 36a and 38a in the sense of a removal of the lugs 37 and 39 from the magnet parts 30 and 32. A leaf spring 40 or 41 attached to each of the anchor arrangements 36 and 38 exerts a slight force in the sense of the pretensioning of the anchor arrangements to the center line of the contact carrier.
  • leaf springs compensate for tolerance differences in the arrangement and ensure that the armature arrangements 36 and 38 are biased in the direction of the pole faces of the magnetic parts 30 and 32. It should be noted that the switching unit described can be manufactured economically because manufacturing tolerances are compensated for by the use of the leaf springs 40 and 41. Even if the surface of the carrier rollers and the surfaces of the roller shafts and the forked end of the anchor assemblies were manufactured as precision parts, there could still be dimensional deviations, for example due to dirt or foreign bodies, which is greater than the desired distance of the extensions 37 and 39 of the anchor assemblies could cause the magnetic parts 30 and 32. The leaf springs ensure that the armature arrangements respond properly to relatively low overcurrents. At the same time, noises are avoided.
  • the switching unit 10 is switched on, the fixed contact arrangement 12 and the bridge contact arrangement 14 being in contact with one another.
  • a sufficient contact force exerted on the contacts minimizes the contact resistance and the contact heating due to the resistance when the current flows.
  • the contact force is applied by coil tension springs 56 and 58, which exert a force on the roller shafts 50 and 52 and the rollers 46 and 48, which in turn exert a force on the contact carrier 44 by acting on the cam surfaces 60. This force maintains the required contact force in order to ensure the lowest possible heating due to the contact resistance.
  • the normal current flows through the input arm 20, the input contact 24 and the bridge contact arrangement 14 as well as through the output contact 26 and the output arm 22. This forms a unidirectional current flow in the encapsulated part of the fixed contact arrangement 12.
  • the current flows in the same direction in the input arm and in the output arm. This results in twice the magnetic field for a given current.
  • the contact bridge arrangement 14 the current flows in the opposite direction as in the fixed contact arms 20 and 22. This generates an electromagnetic repulsive force that lifts the movable contact bridge arrangement 14 from the fixed contact arrangement 12 at sufficiently high currents.
  • the current flowing through the switch increases, the current flowing through the fixed contact arrangement 12 excites the magnetic parts 30 and 32 to a sufficient extent to generate a magnetic field which attracts the armature arrangements 36 and 38.
  • the magnetic parts and the air gap between the magnetic parts and the armature assemblies are calculated so that the armature moves toward the magnetic parts at a predetermined level of current.
  • the forked end portions 36a and 38a are pivoted from the center line of the support assembly against the force of the coil springs 56 and 58. This reduces the downward biasing force on the carrier 44 and thus the force acting on the movable contact bridge assembly 14. This also reduces the magnetic repulsive force that is required to separate the fixed and movable contacts.
  • the contact bridge arrangement is thereby quickly and reliably lifted from the stationary contact arrangement and moved into the disconnected position.
  • the current-limiting switching unit closes automatically after the interruption of an overcurrent due to the combined action of the coil tension springs 56 and 58 and the shape of the second cam surfaces 62, if the second cam surface 62 has an inclination that deviates from the vertical. If the transition area between the first cam surface 60 and the second cam surface 62 is again detected during the closing movement, the downward force on the contact carrier 44 is suddenly greatly increased at this point, and the contacts are closed with the correct contact force.
  • a return spring 66 can be used to also provide a downward biasing force that biases the contacts to the closed position.
  • Each of the two versions is applicable and sufficient; both can also be used in combination.
  • the armature assemblies are attracted during a low level overcurrent and act to reduce the downward force. Due to a high overcurrent, however, the circuit is opened before the armature arrangements can take effect. However, the armatures are attracted by the short current flow that creates a magnetic field, although the circuit is open before the armature assemblies have the opportunity to move.
  • the anchors respond to this and reduce the downward biasing force acting on the contact carrier 44 through the coil tension springs. This reduced force persists until the attractive force of the anchor arrangements is released. This force is a function of the size of the overcurrent. Thus, the higher the overcurrent, the longer the attractive force. This prevents the switch from closing before the overcurrent stops.
  • the circuit breaker to be used in conjunction with the current limiting switch unit was rated for operation at 600 A.
  • the breaking capacity of the current-limiting switching unit according to the invention was above 100,000 A at 480 V AC.
  • the bridge contact arrangement for interrupting this extremely high current has a considerable weight, which hinders easy lifting of the bridge contact arrangement 14.
  • the contacts would normally open at about 8000 A for low level overcurrent, but the magnet arrangement causes the level to drop to about 6000 A.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP86730061A 1985-04-01 1986-04-01 Strombegrenzende Schalteinheit mit einer Kontaktbrückenanordnung Expired - Lifetime EP0199668B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/718,692 US4633207A (en) 1985-04-01 1985-04-01 Cam following bridge contact carrier for a current limiting circuit breaker
US718692 1991-06-21

Publications (3)

Publication Number Publication Date
EP0199668A2 EP0199668A2 (de) 1986-10-29
EP0199668A3 EP0199668A3 (en) 1988-06-01
EP0199668B1 true EP0199668B1 (de) 1992-03-04

Family

ID=24887110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86730061A Expired - Lifetime EP0199668B1 (de) 1985-04-01 1986-04-01 Strombegrenzende Schalteinheit mit einer Kontaktbrückenanordnung

Country Status (7)

Country Link
US (1) US4633207A (pt)
EP (1) EP0199668B1 (pt)
JP (1) JPS61227340A (pt)
AU (1) AU578000B2 (pt)
BR (1) BR8601438A (pt)
DE (1) DE3684032D1 (pt)
ZA (1) ZA862312B (pt)

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US4991050A (en) * 1989-09-18 1991-02-05 Allen-Bradley Company, Inc. Method and device for protecting starters from fault currents
US5892825A (en) * 1996-05-15 1999-04-06 Hyperlock Technologies Inc Method of secure server control of local media via a trigger through a network for instant local access of encrypted data on local media
US7023307B2 (en) * 2003-11-06 2006-04-04 Pratt & Whitney Canada Corp. Electro-magnetically enhanced current interrupter
FR2979743B1 (fr) 2011-09-01 2013-08-30 Socomec Sa Chariot porte contact mobile et appareil de coupure electrique equipe d'un tel chariot
FR2979746B1 (fr) * 2011-09-01 2016-07-01 Socomec Sa Appareil de coupure electrique a haute tenue electrodynamique
FR2979744B1 (fr) 2011-09-01 2015-05-01 Socomec Sa Appareil de coupure electrique a haut pouvoir de fermeture
US11070049B2 (en) 2017-11-08 2021-07-20 Eaton Intelligent Power Limited System, method, and apparatus for power distribution in an electric mobile application using a combined breaker and relay
US11368031B2 (en) 2017-11-08 2022-06-21 Eaton Intelligent Power Limited Power distribution and circuit protection for a mobile application having a high efficiency inverter
US11108225B2 (en) 2017-11-08 2021-08-31 Eaton Intelligent Power Limited System, method, and apparatus for power distribution in an electric mobile application using a combined breaker and relay
EP3707795A2 (en) 2017-11-08 2020-09-16 Eaton Intelligent Power Limited Power distribution unit and fuse management for an electric mobile application
CN108582038B (zh) * 2018-04-10 2021-04-06 清华大学 一种模拟三轴数控机床加工的非接触式力加载装置
US11682895B2 (en) 2019-02-22 2023-06-20 Eaton Intelligent Power Limited Inverter assembly with integrated coolant coupling port
RU2713439C1 (ru) * 2019-07-24 2020-02-05 Виктор Иванович Мрыхин Способ ограничения тока короткого замыкания и устройство для его осуществления

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US3575676A (en) * 1969-11-04 1971-04-20 Gen Electric High-speed, high-current solenoid
US3588762A (en) * 1970-02-25 1971-06-28 Gen Electric Circuit breaker with short circuit magnetic tripping means
US3588761A (en) * 1970-02-26 1971-06-28 Gen Electric Electric circuit interrupter with magnetic trip level adjusting means
FR2185853B1 (pt) * 1972-05-26 1977-12-30 Merlin Gerin
US3991391A (en) * 1974-01-29 1976-11-09 Westinghouse Electric Corporation Circuit interrupter with electromagnetic opening means
US4118681A (en) * 1976-05-12 1978-10-03 Merlin Gerin High-speed current-limiting device having a contact reclosing retarding member
DD127737A2 (de) * 1976-09-30 1977-10-12 Lothar Ackermann Strombegrenzender selbstschalter
US4132968A (en) * 1977-09-06 1979-01-02 Westinghouse Electric Corp. Current limiting circuit breaker with improved magnetic drive device
FR2458887A1 (fr) * 1979-06-07 1981-01-02 Hazemeyer Sa Appareil de coupure de courant electrique du type limiteur d'intensite
US4409573A (en) * 1981-04-23 1983-10-11 Siemens-Allis, Inc. Electromagnetically actuated anti-rebound latch
FR2511542A1 (fr) * 1981-08-12 1983-02-18 Telemecanique Electrique Dispositif de liberation des contacts mobiles de contacteurs aptes a limiter les courants de courts-circuits
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US4630014A (en) * 1985-04-01 1986-12-16 Siemens Energy & Automation, Inc. Current limiting circuit breaker stationary contact assembly with integral magnetic activating means

Also Published As

Publication number Publication date
AU578000B2 (en) 1988-10-06
JPS61227340A (ja) 1986-10-09
BR8601438A (pt) 1986-12-09
EP0199668A2 (de) 1986-10-29
DE3684032D1 (de) 1992-04-09
AU5532786A (en) 1986-10-09
EP0199668A3 (en) 1988-06-01
ZA862312B (en) 1987-02-25
US4633207A (en) 1986-12-30

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