EP3928345A1 - Système d'extinction d'arc électrique - Google Patents

Système d'extinction d'arc électrique

Info

Publication number
EP3928345A1
EP3928345A1 EP20718171.0A EP20718171A EP3928345A1 EP 3928345 A1 EP3928345 A1 EP 3928345A1 EP 20718171 A EP20718171 A EP 20718171A EP 3928345 A1 EP3928345 A1 EP 3928345A1
Authority
EP
European Patent Office
Prior art keywords
switching
fast
control unit
storage device
energy storage
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.)
Pending
Application number
EP20718171.0A
Other languages
German (de)
English (en)
Inventor
Martin BINDRICH
Jürgen EINSCHENK
Karsten Freundt
Stefan Lecheler
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 EP3928345A1 publication Critical patent/EP3928345A1/fr
Pending legal-status Critical Current

Links

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
    • H01H33/02—Details
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/55—Oil reservoirs or tanks; Lowering means therefor
    • H01H33/555—Protective arrangements responsive to abnormal fluid pressure, liquid level or liquid displacement, e.g. Buchholz relays
    • 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
    • H01H33/42—Driving mechanisms
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
    • 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
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H2033/306—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator monitoring the pressure of the working fluid, e.g. for protection measures
    • 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
    • H01H33/68—Liquid-break switches, e.g. oil-break

Definitions

  • the invention relates to an arc extinguishing system, in particular a system for short-circuiting or grounding low-voltage systems and / or medium-voltage systems and components of such an arc extinguishing system.
  • Open arcs in switchgear in low and medium-voltage technology generally cause high levels of damage, so they have a high potential for damage, especially if a switchgear fails for a long time.
  • a short circuit or earth fault can be generated in order to divert the electrical energy that feeds the open arc.
  • Another important factor is a short time delay between the detection of an arc and a short circuit or grounding that has occurred.
  • the object is achieved by a system for short-circuiting or he of low-voltage systems and / or medium-voltage systems, system for short, according to the independent claim 1 and the claims dependent thereon.
  • low and / or medium voltage systems are also referred to as switchgear for short.
  • At least one signal processing unit for processing signals of the at least one error detection unit, wherein the signal processing unit is or can be connected to the error detection unit for signal transmission,
  • At least one control unit which is connected or can be connected to the signal processing unit for signal transmission, with an electrical energy storage device in or on the control unit, and
  • fast-switching switching element With at least one fast-switching switching element with a mechanical energy store, wherein the fast-switching switching element is connected or can be connected to the control unit for the transmission of electrical triggering energy from the electrical energy storage device and with the electrical triggering seenergy triggers a switching process of the fast-switching switching element is, with one stored in the mechanical energy store Drive energy causes the switching process or this can be brought about.
  • the tripping energy is designed to be high, in particular high in comparison to potentially occurring electromagnetic interference, or if it can be designed, in particular in relation to the electromagnetic compatibility of a connectable or connected switchgear.
  • Highly designed in this context means at least a factor of 2, preferably at least a factor 5, especially preferably at least a factor 10 or at least a factor 100, is designed higher than the corresponding reference value of the potentially occurring electromagnetic interference or the electromagnetic compatibility of the associated switchgear or associated low and / or medium voltage system.
  • the electrical energy store is spatially separated from the mechanical energy store, for example a spring store or plate spring store, is ordered.
  • the control unit with the electrical energy store is arranged in a low-voltage space, while the fast-switching switching element with the mechanical energy store in the area of a busbar and / or switchgear, low-voltage and / or medium-voltage system to be protected, with which the system connectable or connected, is arranged.
  • the fault detection unit for detecting an arc has an optical sensor for optically detecting an arc and one
  • control unit has an interface for connecting a computer or a data transmission unit. This is particularly advantageous for setting up and / or maintaining the control unit.
  • control unit (30) have inputs for blocking or triggering a switching process.
  • an emergency power supply can be provided or is arranged at an input, an input for an optional emergency power supply.
  • the fast-switching switching element has an insulating fluid, in particular an insulating oil, in a switching room as the insulating means, the insulating medium completely filling the switching room with built-in components, such as switching contacts, with the switching room between a closed switching position , i.e. one electrically conductive, and one open, i.e. one
  • Electrically separated switching position can be switched by means of a switching process, in particular by moving a moving contact into contact with a fixed contact or by moving the moving contact away from the fixed contact, with a compensating container for the insulating fluid connected to the switching room and the compensating container having a changeable volume , wherein the variable volume is generated by an existing in the compensation container from equalizing piston and a predeterminable variable ble volume is filled with the insulating fluid, the Piston is loaded with a pressure element in such a way that a force acts on the compensating piston in such a way that an expansion of the insulating medium works against the force acting on the compensating piston and, when the volume of the insulating fluid is reduced, the compensating piston is pressed into the compensating container in such a way that the variable volume is completely filled with the insulating fluid, the compensating piston interacting with a signaling element, in particular a microswitch, in such a way that a warning signal is triggered or can be triggered if a value for the variable volume is
  • Switching of the fast-switching switching element are prevented when the predetermined value for the changeable volume and thus the volume of the insulating fluid is fallen below or reached or a further predetermined value for the changeable volume and thus the volume of the insulating fluid is undershot or reached.
  • a further bellows in particular corrugated bellows or bellows, is used, which replaces parts or the entire compensating container or connects to a free end of the compensating container.
  • the signaling element is then provided analogous to the arrangement with the compensating piston.
  • the warning signal can be passed on to a control unit and that the control unit indicates the presence of a warning signal and thus potential oil loss.
  • the system is integrated in a low- and / or medium-voltage installation, switchgear, or can be integrated into it, in particular permanently or removably integrated or integrable.
  • switchgear or can be integrated into it, in particular permanently or removably integrated or integrable.
  • Figure 1 Schematic structure of the system for short-circuiting or grounding of low-voltage systems and / or medium-voltage systems.
  • Figure 2 Schematic structure of a fast switching
  • Figure 1 shows an exemplary schematic structure of the system for short-circuiting or grounding of low-voltage systems and / or medium-voltage systems 1.
  • a fault detection unit 10 is used to detect an arc by means of various sensors, in particular optical sensors 4 and current sensors 6. Detect the individual sensors of the Error detection unit 10 a signal, this is passed from the error detection unit 10 to a signal processing unit 20 for evaluation. The signal processing unit 20 then determines, also for example on the basis of the correlation of the individual measured values of the individual sensors, whether there is a fault that requires grounding or short-circuiting. If such a fault, in particular an electric arc, is detected, a signal, in particular an error signal, is passed from the signal processing unit 20 to a control unit 30.
  • the control unit 30 then supplies fast-switching switching elements 40, 42, 44 with electrical triggering energy from an electrical energy storage device 35.
  • the electrical triggering energy triggers a mechanical energy store in the fast-switching switching elements 40, 42, 44 Drive energy for the fast-switching switching elements 40, 42, 44 for switching operations, in particular short-circuiting or grounding, provides or a central mechanical energy store 45 is triggered, which provides drive energy for the fast-switching switching elements 40, 42, 44 for switching operations, in particular short-circuiting or Earth, provides.
  • the control unit 30 here has an electrical energy storage device 35 built into the control unit 30, but the electrical energy storage device 35 can also be arranged in spatial proximity to the control unit 30.
  • control unit 30 optionally has an interface for connecting a computer or a data transmission unit 15.
  • Inputs 18 and 19 for blocking or triggering the triggering of a switching process are also optionally available.
  • An emergency power supply can also optionally be provided or arranged at the optional input 17.
  • FIG. 2 shows an exemplary schematic structure of a fast-switching switching element 40 with an oil loss warning.
  • the fast-switching switching element 40 here has a switching room 50 in which a moving contact 70 is movably arranged and a fixed contact is arranged.
  • the moving contact is movably arranged in the switch room 50, for example by means of a bellows 55 or through a hermetically sealed bushing.
  • a compensating container 90 is connected to the control room 50, so that the insulating fluid can change between the control room 50 and the compensating container 90.
  • the expansion tank 90 is closed on a non-communicating with the switching room 50 side by a movable but sealingly mounted compensation piston 100 ver.
  • the switch room 50 is filled with the insulating fluid 60 with its built-in components and the compensating container 90 is filled with the insulating fluid 60 up to the compensating piston.
  • a pressure element 110 acts on the compensating piston 100, which exerts a force on the compensating piston 100 in such a way that it goes out
  • the compensating piston 100 against the force of the pressure element 110 pushes out of the compensating container 90 and thus a change in volume of the Iso lierfluides 60 compensated.
  • the compensating piston interacts with a signaling element 120, here it presses a microswitch as a signaling element 120.
  • a warning signal is triggered and / or the readiness for switching is canceled or blocked.
  • insulating fluid in particular insulating oil

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

La présente invention concerne un système pour court-circuiter ou mettre à la terre des installations de basses et/ou moyennes tensions. Le système comprend : - au moins une unité de détection d'erreurs (10) pour détecter un arc électrique, - au moins une unité de traitement de signaux (20) pour traiter des signaux de la ou des unités de détection d'erreurs (10), l'unité de traitement de signaux (20) étant reliée ou pouvant être reliée à ou aux unités de détection d'erreur (10) pour transmettre des signaux, - au moins une unité de commande (30) qui est reliée ou peut être reliée à l'unité de traitement de signaux (20) pour transmettre des signaux, - un dispositif d'accumulation d'énergie électrique (35) à l'intérieur ou à proximité de l'unité de commande (30), et - au moins un élément de commutation (40, 42, 44) à action rapide muni d'un accumulateur d'énergie mécanique.
EP20718171.0A 2019-03-27 2020-03-24 Système d'extinction d'arc électrique Pending EP3928345A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019204227 2019-03-27
PCT/EP2020/058101 WO2020193519A1 (fr) 2019-03-27 2020-03-24 Système d'extinction d'arc électrique

Publications (1)

Publication Number Publication Date
EP3928345A1 true EP3928345A1 (fr) 2021-12-29

Family

ID=70277325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20718171.0A Pending EP3928345A1 (fr) 2019-03-27 2020-03-24 Système d'extinction d'arc électrique

Country Status (3)

Country Link
US (1) US11837420B2 (fr)
EP (1) EP3928345A1 (fr)
WO (2) WO2020193505A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1537673A (fr) * 1966-04-15 1968-09-07 Perfectionnements apportés aux disjoncteurs
US4130850A (en) * 1977-01-12 1978-12-19 Gould Inc. High speed fault diverter switch for gas-insulated systems
DE3545782A1 (de) * 1985-12-20 1987-06-25 Siemens Ag Hydraulische antriebsvorrichtung fuer einen elektrischen druckgasschalter
US5534858A (en) * 1994-01-14 1996-07-09 System Analysis & Integration, Inc. Poletop switch automation system
US5933308A (en) * 1997-11-19 1999-08-03 Square D Company Arcing fault protection system for a switchgear enclosure
EP1971007A1 (fr) * 2007-03-16 2008-09-17 ABB Technology AG Système et procédé de protection par défaut dans des sous-stations compacts secondaires
DE102011080136B3 (de) * 2011-07-29 2012-11-15 Siemens Aktiengesellschaft Lichtbogenfreiraum für Schaltanlagen
US8964344B2 (en) 2012-08-24 2015-02-24 Schneider Electric USA, Inc. Circuit breaker signaling system for control of an arc fault detection system
CN105632804A (zh) * 2014-10-31 2016-06-01 通用电气公司 开关装置及具有该开关装置的功率传递和分配系统
CN105374615B (zh) * 2015-12-09 2017-07-11 中国西电电气股份有限公司 一种高压大电流的选相合闸装置
US10305262B2 (en) * 2016-09-26 2019-05-28 Bethel Idiculla Johnson Medium voltage switchgear enclosure

Also Published As

Publication number Publication date
WO2020193505A1 (fr) 2020-10-01
WO2020193519A1 (fr) 2020-10-01
US20220181106A1 (en) 2022-06-09
US11837420B2 (en) 2023-12-05

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