EP0466048A2 - Interrupteur des courants de défaut - Google Patents

Interrupteur des courants de défaut Download PDF

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Publication number
EP0466048A2
EP0466048A2 EP91111229A EP91111229A EP0466048A2 EP 0466048 A2 EP0466048 A2 EP 0466048A2 EP 91111229 A EP91111229 A EP 91111229A EP 91111229 A EP91111229 A EP 91111229A EP 0466048 A2 EP0466048 A2 EP 0466048A2
Authority
EP
European Patent Office
Prior art keywords
switching device
fault currents
currents according
switch
switching
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.)
Granted
Application number
EP91111229A
Other languages
German (de)
English (en)
Other versions
EP0466048B1 (fr
EP0466048A3 (fr
Inventor
Karl Dipl. Ing. Stegmüller
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.)
Schneider Electric Sachsenwerk GmbH
Original Assignee
Sachsenwerk Licht und Kraft AG
Sachsenwerk AG
AEG Sachsenwerk GmbH
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 Sachsenwerk Licht und Kraft AG, Sachsenwerk AG, AEG Sachsenwerk GmbH filed Critical Sachsenwerk Licht und Kraft AG
Publication of EP0466048A2 publication Critical patent/EP0466048A2/fr
Publication of EP0466048A3 publication Critical patent/EP0466048A3/fr
Application granted granted Critical
Publication of EP0466048B1 publication Critical patent/EP0466048B1/fr
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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/08—Terminals; Connections
    • H01H2071/088—Terminals for switching devices which make the devices interchangeable, e.g. with fuses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/505—Latching devices between operating and release mechanism
    • H01H2071/506—Latching devices between operating and release mechanism using balls or rollers in the latching device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/022—Details particular to three-phase circuit breakers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • H01H33/6641—Contacts; Arc-extinguishing means, e.g. arcing rings making use of a separate coil
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/1009—Interconnected mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/122—Automatic release mechanisms with or without manual release actuated by blowing of a fuse
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
    • H01H71/125—Automatic release mechanisms with or without manual release using a solid-state trip unit characterised by sensing elements, e.g. current transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release

Definitions

  • the invention relates to a switching device for interrupting fault currents, preferably for transformer branches in medium-voltage switchgear according to the preamble of the first claim.
  • Such switching devices are preferably used in ring cable switchgear, which generally consist of two ring line panels and at least one switch panel for a transformer feeder.
  • ring cable switchgear which generally consist of two ring line panels and at least one switch panel for a transformer feeder.
  • CALOR-EMAG publication “Switchgear for Local Distribution Stations with Vacuum Circuit Breakers”; Klaus Böttger and Bruno Schemann, reprint from electrotechnical magazine volume 106 (1985) issue 10 describes a switchgear with the known switching device.
  • the ring cable outlets are each equipped with a load switch and the transformer outlet with a vacuum circuit breaker. The latter takes over the short-circuit protection for this branch in conjunction with an overcurrent relay fed by a current transformer.
  • the switchgear mentioned which is gas-insulated with SF6, is considered to be fully insulated, since HH fuses are no longer provided outside the enclosure for short-circuit protection. In addition, it is considered to be maintenance-free, since after the interruption of a short-circuit current by a remotely controllable reclosure of the circuit breaker, the operation again can be recorded without having to intervene to replace equipment, such as the fuses.
  • the lack of HV fuses also excludes other sources of error, such as: presence of one critical current range in which a fuse has not yet responded or only after a very long melting time and in which there is therefore a risk of overheating and explosion. In addition, a strong spread of the fuse characteristics and an overload of the load switch in the limit area of the fuse, among other things, must be observed.
  • the vacuum circuit breaker in the specified switchgear, must have the full, e.g. according to the valid VDE regulations have fixed insulation properties and the design of the contacts and the energy storage are able to switch on short-circuit currents without welding.
  • connection area ie outside the encapsulation of the switchgear, sufficient space must also be provided for the required cable conversion converters.
  • the overcurrent relays are also to be subjected to routine monitoring checks at certain intervals, which is only possible if the feeder is disconnected.
  • a three-phase interruption of the feeder is always carried out even in the case of single-phase faults, although in many cases it would be advantageous to maintain a two-phase emergency operation. This applies above all to rigidly grounded networks, such as those used in many overseas countries. If the known switching device is used in an air-insulated switchgear, all of its elements are fully exposed to the environmental climate.
  • the invention has for its object to develop a switching device that can be used as a single-phase, self-sufficient equipment for repeated interruption of short-circuit currents.
  • all elements in the switching device should be fully protected against the environmental influences, that is to say also against corrosive climates.
  • the switching device according to the invention contains all functionally important elements in a single-phase housing and is therefore suitable for intermittent interruption of fault currents.
  • the housing can be made gas-tight, so that the use of the protective device according to the invention also results in a significant improvement in the service life of air-insulated switchgear, especially in a humid or corrosion-prone environment.
  • the switching device according to the invention is self-sufficient because it contains an energy store and a release system, as well as a reclosing device, which can also be easily operated from the operator side in encapsulated gas-insulated switchgear. Due to the built-in vacuum interrupter, the switching device has an almost unlimited service life.
  • FIG. 1 A particularly advantageous embodiment of the inventive concept is shown in FIG.
  • the housing of the switching device according to the invention has a cylindrical shape and is divided into two parts inside.
  • the vacuum interrupter 1 the fixed contact 1a of which is connected to the connector 2 via the conductor spiral 23.
  • the spiral-shaped conductor 23 With the help of the spiral-shaped conductor 23, a magnetic field is generated, which runs almost parallel to the switch axis in the open contact gap between the switching contacts 1a and 1b and thus improves the switching capacity of the vacuum switching chamber in a known manner.
  • the second room is closed by the second connector 3.
  • the essential part of the first space is encased by the insulating tube 6, while the second part of the housing is closed off by the metal tube 7.
  • the switching chamber when the switching chamber is open, the recurring voltage at the switching contacts is present at the porcelain tube of the vacuum switching chamber 1 as well as at the ends of the insulating tube 6.
  • the length of the ceramic tube can be significantly smaller than the length of the insulating tube 6, which can also be exposed to unfavorable environmental influences.
  • the current transformer 4 consists of a ring core 4a and a secondary coil 4b, while the shaft of the movable switching contact 1b or its extension 25 serves as the primary conductor.
  • the latter is connected to the second connection piece 3 via a sliding contact 24 and is therefore flowed through by the primary current during operation.
  • the magnetic release 5 includes a ring coil 5 and a ferromagnetic body 5b surrounding it on three sides, the lower leg of which is designed such that it has a minimal air gap with respect to the magnet armature 5c which can be moved in the vertical direction.
  • the latter is under the action of a return spring 14, which presses it into its rest position when the ring coil 5a is not energized, forming the air gap 26 in the vertical direction relative to the ferromagnetic body 5b (left side of FIG. 1).
  • the current transformer 4 and the magnetic release 5 form an annular gap with respect to the extension 25, in which in the present example the switch-off spring 9, which is supported with its upper end on the partition 8, is arranged.
  • the lower end of the switch-off spring 9 rests on the pressure piece 10b, which in turn is supported over an inclined surface by means of the clamping bodies 10a in the axial direction on the support plate 10c and in the radial direction on the magnet armature 5c (left side of FIG. 1).
  • the lower end of the contact force spring 12 is also supported via the tube 11, which are designed as plate springs in the present example and the upper end of which acts on the shaft of the movable switching contact 1b of the vacuum interrupter chamber 1 via the shoulder 21.
  • the pin 15 attached in the extension 25 ensures that the two switching contacts 1a and 1b in the switched-off state do not exceed the stroke h.
  • the pin 15 interacts either with the lower surface of the pressure piece 10b or, as drawn in FIG. 1, with a groove 30 machined into the pressure piece (right side of FIG. 1).
  • the switching device according to the invention is only ready for switching after turning the screw spindle 18 back into the starting position, namely when the required distance between the lower surface of the pressure piece 10b and the upper edge of the screw spindle 18 has been established. In order to enable easy assembly of the switching device according to the invention, it is advisable to screw the lower connector 3 into the metal tube 7.
  • the switching device it is possible to dispense with the attachment of a spiral conductor 23 for generating an axial magnetic field. No additional external energy source is required for the secondary circuit. Rather, the secondary winding 4b of the current transformer 4 is connected in series with the ring coil 5a.
  • the screw spindle 18 can be designed such that, in addition to its function as a switch-on mechanism for the vacuum switching chamber 1, it also serves as a stop for the pressure piece 10b during each switch-off process.
  • connectors 2 and 3 have pads 2a and 3a, which can be used as an adapter for the terminal contacts of HV fuses.
  • pads 2a and 3a can be used as an adapter for the terminal contacts of HV fuses.
  • other connection surfaces can also be used in the same way.
  • the switching device for example, a ring cable switchgear according to FIG. 2 with two cable connections in the lower part of the encapsulation and with a transformer branch in the upper part, in which the residual current protection is integrated into the encapsulation, without using a complete functional circuit breaker got to. Since the switching device according to the invention is a self-sufficient unit which does not require any external energy and in which no replacement of components is required after the fault current has been interrupted, it can be fully incorporated into the encapsulated switching insert. In this case, the same high level of insulation applies to them as for all other equipment installed in the switchgear.
  • the ring cable switchgear system according to FIG. 2 has, as an example, two three-position switches 32 in its lower part, with which the ring cable can be connected to the busbar 37 or with which each individual cable can be disconnected or grounded.
  • the busbar 37 is connected at the top to a further three-position switch 32, to the switching contacts of which the switching device according to the invention is connected to interrupt fault currents.
  • This switching device is constructed via two clamping contacts 35 and associated insulators on the encapsulation 31; the switching device is oriented so that the second connector 3 faces one of the walls of the encapsulation.
  • the screw spindle 18, not shown, is extended by the insulating shaft 19, which is guided gas-tight to the outside of the switchgear. With your help, either by hand or with a motor drive 34 after the fault current has been interrupted, the switching device 33 can be switched on again or the switch-off spring 9 can be tensioned and latched.
  • the switching device according to the invention is a single-phase switching device.
  • the end face 25a (not shown) (see FIG. 1) of the switching device 33 according to the invention can be connected to the associated three-position switch 32 by means of a linkage 36 in order to generate a disconnection of the branch after a fault current interruption.
  • this three-position switch should also be equipped with single-phase actuation.
  • FIG. 3 shows how the connection between the three single-phase switching devices 33 and a three-phase switch-disconnector 32a takes place by means of an electrical control, and fault current interruptions in one phase are not must lead to the disconnection of the load break switch 32a, but only a two- or three-phase fault current interruptions leads to the final disconnection of the circuit.
  • Each movable switch contact 1b of the switching device 33 is connected to a two-pole auxiliary switch 39 arranged outside the encapsulation 31.
  • the auxiliary switches 39 of all three phases are connected to one another in such a way that an auxiliary contact of two phases is connected in series with one another and is connected to the shunt release of the energy store 38.
  • the energy store can be switched off arbitrarily both via the button 41 and the energy source 40 and, in the event of a fault, via the auxiliary switch 39.
  • the connecting lines between the auxiliary switches 39 of the individual phases are switched so that the shunt release of the energy store 38 is only live when the vacuum interrupters 1 have been interrupted in two phases. In the case of a single-phase interruption, only one contact auxiliary switch is closed, so that there is no control voltage at the energy store.
  • the switching device according to the invention according to FIG. 1 can also be used very advantageously in air-insulated switchgear.
  • the housing is designed and sealed so that corrosive influences from the environment cannot penetrate into the interior of the switching device.
  • the length of the insulating tube 6 is also adapted to the harsher environmental influences.
  • the capacitance can be designed as a cylindrical capacitor 28 a.
  • the cylindrical capacitor 28 a is advantageously arranged in a gap between the secondary winding 4 b of the current transformer 4 and the metal tube 7 of the housing.
  • the two pads are connected according to the circuit diagram of Figure 4 with the outputs of the secondary winding 4 b and the toroidal coil 5a.
  • a plate capacitor 28b can also be used as a capacitance for influencing the switch-off time for the switching device.
  • This plate capacitor 28 can advantageously be arranged between the current transformer 4 and the magnetic release 5.
  • the connection is made according to the circuit diagram in FIG. 4.
  • openings b 42 are provided in the ferromagnetic body 5 b, through which the electrical connections to the capacitors or to the secondary coil 4 a of the current transformer 4 are made.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Gas-Insulated Switchgears (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
EP91111229A 1990-07-10 1991-07-05 Interrupteur des courants de défaut Expired - Lifetime EP0466048B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4021945A DE4021945C2 (de) 1990-07-10 1990-07-10 Schaltvorrichtung zur Unterbrechung von Fehlerströmen
DE4021945 1990-07-10

Publications (3)

Publication Number Publication Date
EP0466048A2 true EP0466048A2 (fr) 1992-01-15
EP0466048A3 EP0466048A3 (fr) 1992-12-30
EP0466048B1 EP0466048B1 (fr) 1996-10-09

Family

ID=6410022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91111229A Expired - Lifetime EP0466048B1 (fr) 1990-07-10 1991-07-05 Interrupteur des courants de défaut

Country Status (4)

Country Link
US (1) US5206616A (fr)
EP (1) EP0466048B1 (fr)
JP (1) JPH04229918A (fr)
DE (2) DE4021945C2 (fr)

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EP1942514A1 (fr) * 2007-01-04 2008-07-09 Eaton Electric B.V. Appareillage de commutation dans des environnements à forte pression
CN101986407A (zh) * 2010-12-06 2011-03-16 东南大学 一种超高压真空断路器快速操动机构及其控制方法
EP2256774A3 (fr) * 2001-06-01 2014-05-14 Hubbell Incorporated Dispositif d'interruption de circuits electriques
CN107293988A (zh) * 2017-07-21 2017-10-24 深圳市赛斯电气技术有限公司 一种限流真空断路器环网柜
CN110429489A (zh) * 2019-06-25 2019-11-08 南安市博铭工业设计有限公司 一种便于快速断电的电力箱
CN113241267A (zh) * 2021-03-29 2021-08-10 平高集团有限公司 一种快速分闸/合闸电磁斥力机构及快速分闸/合闸开关

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US8497446B1 (en) 2011-01-24 2013-07-30 Michael David Glaser Encapsulated vacuum interrupter with grounded end cup and drive rod
CN103460324B (zh) * 2011-04-02 2016-03-02 赖茵豪森机械制造公司 分接开关和用于这种分接开关的真空开关管
EP2544203A1 (fr) * 2011-07-04 2013-01-09 ABB Technology AG Séparateur de charge haute tension électrique et procédé d'ouverture de celui-ci
US9761394B2 (en) 2013-02-08 2017-09-12 Hubbell Incorporated Current interrupter for high voltage switches
GB2522696A (en) * 2014-02-03 2015-08-05 Gen Electric Improvements in or relating to vacuum switching devices
CN105449536B (zh) * 2014-08-29 2018-11-13 西门子公司 高压组合电器
EP2996131B1 (fr) * 2014-09-12 2020-08-05 ABB Schweiz AG Pôle d'interrupteur à vide pour application dans un environnement sous haute pression
US9633808B2 (en) * 2014-10-06 2017-04-25 Eaton Corporation Electrical interruption apparatus with wear indicator
EP3026689B1 (fr) * 2014-11-27 2018-06-27 Tyco Electronics UK Limited Disjoncteur haute tension, système, module interrupteur à vide et module d'entraînement associé
DE102015200135A1 (de) * 2015-01-08 2016-07-14 Siemens Aktiengesellschaft Kopplungsglied für ein elektrisches Schaltgerät,insbesondere eine Vakuumschaltröhre
DE102015211030A1 (de) * 2015-06-16 2016-12-22 Siemens Aktiengesellschaft Schnell schließendes Schaltelement
EP3179583A1 (fr) * 2015-12-11 2017-06-14 ABB Schweiz AG Disjoncteur à vide de moyenne tension dans un boîtier isolé par sf6 pour une utilisation dans des environnements sous haute pression
KR101870016B1 (ko) * 2016-02-16 2018-07-23 엘에스산전 주식회사 바이패스 스위치
FR3061249B1 (fr) * 2016-12-22 2020-05-22 Schneider Electric Industries Sas Dispositif de guidage d'un ressort dans un mecanisme de commande et appareil de protection electrique le comportant
GB2565085B (en) * 2017-07-31 2020-05-20 Camlin Tech Limited Improved Vacuum Circuit Breaker
FR3080946B1 (fr) 2018-05-07 2021-02-19 Alstom Transp Tech Disjoncteur a interrupteur a vide
DE102018210617A1 (de) * 2018-06-28 2020-01-02 Siemens Aktiengesellschaft Hochspannungsdurchführung
EP4128303A4 (fr) 2020-03-31 2024-04-17 Hubbell Incorporated Système et procédé de fonctionnement d'un commutateur électrique
MX2023009869A (es) 2021-02-25 2023-08-29 Jst Power Equipment Inc Sistema de conmutacion de media tension con control de disyuntor monofasico.

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DE3415743A1 (de) * 1984-04-26 1985-10-31 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung fuer einen vakuumschalter
DE3422949A1 (de) * 1984-06-19 1985-12-19 Siemens AG, 1000 Berlin und 8000 München Vakuumschaltroehre mit einer spule zum erzeugen eines magnetfeldes
US4765771A (en) * 1987-05-15 1988-08-23 Jmk International, Inc. Apparatus for inserting sealing strip into concrete expansion joints
DE8805942U1 (de) * 1988-05-04 1988-07-28 Concordia Sprecher Energie GmbH, 70794 Filderstadt Gekapselte Lichtbogenlöscheinrichtung für Lasttrennschalter

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2256774A3 (fr) * 2001-06-01 2014-05-14 Hubbell Incorporated Dispositif d'interruption de circuits electriques
EP2256775A3 (fr) * 2001-06-01 2014-05-14 Hubbell Incorporated Dispositif d'interruption de circuits électriques
EP1402548B1 (fr) * 2001-06-01 2017-07-26 Hubbell Incorporated Dispositif d'interruption de circuits electriques
EP1942514A1 (fr) * 2007-01-04 2008-07-09 Eaton Electric B.V. Appareillage de commutation dans des environnements à forte pression
WO2008082303A1 (fr) * 2007-01-04 2008-07-10 Eaton Electric B.V. Appareillage de connexions pour des environnements à haute pression
CN101986407A (zh) * 2010-12-06 2011-03-16 东南大学 一种超高压真空断路器快速操动机构及其控制方法
CN101986407B (zh) * 2010-12-06 2013-01-30 东南大学 一种超高压真空断路器快速操动机构及其控制方法
CN107293988A (zh) * 2017-07-21 2017-10-24 深圳市赛斯电气技术有限公司 一种限流真空断路器环网柜
CN110429489A (zh) * 2019-06-25 2019-11-08 南安市博铭工业设计有限公司 一种便于快速断电的电力箱
CN110429489B (zh) * 2019-06-25 2020-08-25 江苏华鹏智能仪表科技股份有限公司 一种便于快速断电的电力箱
CN113241267A (zh) * 2021-03-29 2021-08-10 平高集团有限公司 一种快速分闸/合闸电磁斥力机构及快速分闸/合闸开关

Also Published As

Publication number Publication date
DE59108251D1 (de) 1996-11-14
US5206616A (en) 1993-04-27
EP0466048B1 (fr) 1996-10-09
DE4021945C2 (de) 1999-12-30
DE4021945A1 (de) 1992-01-16
EP0466048A3 (fr) 1992-12-30
JPH04229918A (ja) 1992-08-19

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