EP0281817A1 - Lichtbogenlöscheinrichtung für Lastschalter - Google Patents

Lichtbogenlöscheinrichtung für Lastschalter Download PDF

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Publication number
EP0281817A1
EP0281817A1 EP88102410A EP88102410A EP0281817A1 EP 0281817 A1 EP0281817 A1 EP 0281817A1 EP 88102410 A EP88102410 A EP 88102410A EP 88102410 A EP88102410 A EP 88102410A EP 0281817 A1 EP0281817 A1 EP 0281817A1
Authority
EP
European Patent Office
Prior art keywords
switching element
arc
quenching device
load switch
main 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.)
Withdrawn
Application number
EP88102410A
Other languages
German (de)
English (en)
French (fr)
Inventor
Karl Dipl.-Ing. Stegmüller (FH)
Peter Ing. Illmann (Grad.)
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 EP0281817A1 publication Critical patent/EP0281817A1/de
Withdrawn legal-status Critical Current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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas

Definitions

  • the invention relates to an arc extinguishing device according to the preamble of patent claim 1.
  • An arc quenching device of the type mentioned is specified in DE-AS 11 32 622.
  • the compressed air switch described there consists of a pair of main cutting blades and a double-leg auxiliary cutting blade, both of which are mounted in a common pivot point.
  • the auxiliary disconnecting knife carries a quenching chamber and is connected to a bellows in such a way that the air compressed in the latter during the switch-off movement flows into the quenching chamber and there causes the arc current to be interrupted.
  • the bellows is held by a longitudinally displaceable guide part provided with an inner bore, which has its first abutment in a point eccentrically arranged to the pivot point of the cutting knife and its second abutment in a swivel joint belonging to the arcing chamber.
  • the main separating knife In the event of a switch-off movement, the main separating knife first cuts and then takes the auxiliary separating knife with the quenching chamber with it, with both separating knives being pivoted at the same angular velocity.
  • the compressed air by pushing the bellows together flows into the quenching chamber for blowing the auxiliary switching point.
  • the extinguishing device is intended to work with the high-quality insulating gas, for example SF6, present in the completely encapsulated switchgear. Since, due to the electronegative properties of the gas, the deionization properties at the zero crossing of the arc to be interrupted are several times better than with air, a comparatively low flow rate in the nozzle is sufficient. For this reason, the invention provides for the generation of the gas flow during the burning time of the arc, at least in the first section, the dynamic pressure which arises in an open storage space which is moved with the auxiliary switching element. Additional compression is only effective in the case of arches that burn longer, for example in the last extinguishing phases of a three-phase system.
  • the high-quality insulating gas for example SF6, present in the completely encapsulated switchgear. Since, due to the electronegative properties of the gas, the deionization properties at the zero crossing of the arc to be interrupted are several times better than with air, a comparatively low flow rate in the nozzle is sufficient. For this
  • the accumulation and compression pressure is generated in an energy-saving manner by the following sequence in the movement sequence of an opening process: - Currentless opening of the main switching element at any low speed , simultaneous charging of a spring accumulator provided between the two switching elements; - releasing the auxiliary switching element from its latching, formation of the arc; - lagging movement of the auxiliary switching element under the action of the spring accumulator acting between the two switching elements, use of the gas flow against the arc by means of dynamic pressure, - Increasing the gas flow through compression in the second part of the lagging movement, intensive blowing with longer arcs.
  • the specified sequence of movements enables the use of an advantageous drive with comparatively low energy, since the movement of the main switching element, which is more or less mass-dependent depending on the current intensity, and the charging of the spring accumulator is fundamentally without influence on the arc interruption process and therefore need not be limited in time the operating current only has to carry a few milliseconds, it can be of low mass and can therefore be brought up to high speed quickly.
  • FIG. 1 shows a load switch pole installed in a closed housing 31 filled with insulating gas.
  • the current flows in position I from the busbar 32 via the connection 12 to the main contact 11, via the main switching element 1 to the fulcrum 8 at the fixed contact 4 and to the connection 13, which is built on the high-voltage plug 33.
  • the load switch is actuated by the shaft 2 which is tightly guided in the housing 31 and the isolating switch rod 48.
  • the main switching element 1 consists of two parallel knives that absorb the nominal current and, in the event of a fault, the short-circuit load. (Fig.4).
  • the two knives contact the main contact 11 in the usual way in position I.
  • the extinguishing device according to the invention with the auxiliary switching element 3, the nozzle body 16 and the storage space 7 is arranged between the knives of the main switching element 1 and also around the pivot point 8 swiveling.
  • a piston 62 which cooperates with the opening 61 in the second part of the pivoting movement of the auxiliary switching element 3 and is fastened on the main switching element 1, completes this embodiment of the arc extinguishing device according to the invention.
  • the spring 14 is articulated on both switching elements 1, 3, accelerates the lagging auxiliary switching element 3 during the interruption and pulls it as far as the stop 5. In this position, the piston 62 fully immersed in storage space 7.
  • FIG. 4 shows a sectional view of two different phases of blowing the arc.
  • the arrows show how the gas flows into the storage space 7, is stowed there and because of the pressure difference p1-p0 formed by the nozzle 6 at high speed to Arc 34 is steered.
  • the main switching element On the right side, the main switching element has reached the open position 0; the piston 62 is already in the opening 61 and now compresses the gas in the storage space 7 to the pressure p2 and increases the gas flow through the nozzle 6, since p2> p1.
  • the auxiliary switching element 3 is arranged between the knives of the main switching element 1. As a low-mass component, it can best be made from a light metal.
  • the driver 9 is rotatably arranged between the two knives of the main switching element 1 so that it does not protrude significantly from the profile of the two switching elements 1, 3 in the rest position.
  • the stop 5 limits the movement of the auxiliary switching element 3 in the rest position and ensures that it is carried along when the ice is switched off. ( Figures 1 and 2).
  • the lagging auxiliary switching element is itself designed as an elastic part in the form of a spiral spring 15 (FIG. 3).
  • the spiral spring 15 is fastened or clamped in the vicinity of the fulcrum 8, for example on a crossbar 35 connecting the two knives of the main switching element 1; it can expediently be carried out layered from several layers of spring steel.
  • the brief current load during the interruption process can be taken over by the spring cross section or by one or more layers of a strip of high conductivity (eg Cu), which can be provided in addition to the spiral spring 15.
  • the total energy required to achieve the speed V2 is stored in the spiral spring 15 when switched off until the lagging auxiliary switching element 3 is carried along.
  • a variant of the driver is also shown, which consists of a lever joint 36.
  • the auxiliary switching element 3 is taken along at the start of the extinguishing process, while at the end of the switch-off movement (dashed line) the joint folds between the two knives of the main switching element 1 and the insulation distances from other live or earthed parts are not reduced by protruding parts.
  • FIGS. 5a, b and c show schematically how the arc quenching device according to the invention can also be used with drawer switches.
  • both switching elements 41, 42 can be designed as cylindrical or tubular parts.
  • the stationary contact comprises a tulip contact 51 which, when switched on, transmits the current to the main switching element 41, from which the stationary contact 47 leads it to the lower switch connection.
  • the auxiliary contact 17 is, as in the embodiments already described, locked with the nozzle body 16.
  • the nozzle body 16 is fastened to the low-mass tubular auxiliary switching element 42, which simultaneously forms the storage space for the gas and can be moved parallel to the main switching element 1.
  • There is a current transmission between the switching elements 41 and 42 for example provided as a simple sliding contact (not shown).
  • a piston 62 is connected to the main switching element 41 and cooperates with the auxiliary switching element 42, which acts as a cylinder in its interior.
  • FIG. 5a shows the entire arc quenching device in the switched-on position, the piston 62 being in the auxiliary switching element 42.
  • the driver 43 attached to the main switching element 41 strikes the collar 44 of the auxiliary switching element 42 and releases the latching between the nozzle body 16 and the auxiliary contact 17.
  • the spring 45 has previously been tensioned by the relative movement between the two switching elements. It now pulls the nozzle body 16 and the auxiliary switching element 42 at high speed V2 in the switch-off direction, the gas in the storage space being blown through the nozzle 6 against the arc 34.
  • FIG. 5b it can be seen how the spring 45 has already pulled the auxiliary switching element 42 so far that the piston 62 is immersed in the auxiliary switching element 42 again and conveys further gas into the arc 34 with the aid of the compression pressure which now arises.
  • the auxiliary switching element 42 bears on the ring 46, which is connected to the main switching element 1 via the driver 43.
  • the piston 62 is again in the interior of the auxiliary switching element 42, as in FIG. 5 a.
  • FIGS. 6 and 7 show the arc extinguishing device according to the invention using a bellows 63 for displacing insulating gas.
  • the auxiliary switching element 3 with the storage space 3 is shown shortly after the locking between the auxiliary contact 17 and the nozzle body 16 has been released.
  • a gas flow already acts on the arc 34, which is similar to that of FIG. 4, left side, due to the pressure difference p1-p0.
  • the storage space 7 touches the bellows 63 in an almost sealing manner along an edge or surface lying on all sides.
  • the bellows 63 is held in position by inherent stability or by built-in springs, in which it comes into contact with the storage space during the opening movement.
  • the arc extinguishing device according to the invention can also advantageously be used to improve the load switching function of three-position switches, as indicated in FIG. 8. Parts with the same function are given the same reference numerals with reference to FIG. 1.
  • the power supply unit connected to the high-voltage plug 33 is grounded via the ground contact 19.
  • FIG. 9 schematically shows an arrangement which is possible in principle, parts with the same function again being given the same reference numerals.
  • the main switching element 101 is designed with two arms and is actuated by an insulating shaft 49 common to all 3 phases of a switch. Both ends of the main switching element 101 are each provided with an auxiliary switching element 103 with a nozzle body 16, storage space 7 and spring 14. In the In position I, the switching elements 101, 103 each connect the busbar 32 to the high-voltage connector 33.
  • FIG. 7 shows the extinguishing position of the double-arm load switch.

Landscapes

  • Circuit Breakers (AREA)
  • Push-Button Switches (AREA)
  • Keying Circuit Devices (AREA)
EP88102410A 1987-03-11 1988-02-19 Lichtbogenlöscheinrichtung für Lastschalter Withdrawn EP0281817A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3707742 1987-03-11
DE3707742 1987-03-11
DE19873743827 DE3743827A1 (de) 1987-03-11 1987-12-23 Lichtbogenloescheinrichtung fuer lastschalter
DE3743827 1987-12-23

Publications (1)

Publication Number Publication Date
EP0281817A1 true EP0281817A1 (de) 1988-09-14

Family

ID=25853321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88102410A Withdrawn EP0281817A1 (de) 1987-03-11 1988-02-19 Lichtbogenlöscheinrichtung für Lastschalter

Country Status (4)

Country Link
EP (1) EP0281817A1 (enrdf_load_stackoverflow)
DE (1) DE3743827A1 (enrdf_load_stackoverflow)
FI (1) FI880934A7 (enrdf_load_stackoverflow)
NO (1) NO881062L (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2695249A1 (fr) * 1992-09-03 1994-03-04 Alsthom Gec Disjoncteur haute ou moyenne tension a soufflage axial.
CN112585712A (zh) * 2018-08-16 2021-03-30 Abb瑞士股份有限公司 气体绝缘低压或中压负载断路开关
EP3916751A1 (en) * 2020-05-27 2021-12-01 Cooper Edison (Pingdingshan) Electronic Technologies Co., Ltd. An arc extinguishing nozzle and a load switch with the arc extinguishing nozzle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3942568A1 (de) * 1989-12-22 1991-06-27 Sachsenwerk Ag Druckgasschalter
CN108155501B (zh) * 2018-02-13 2024-05-14 国网上海市电力公司 10kv出线电缆与架空线路搭接作业用杆式消弧装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL40946C (enrdf_load_stackoverflow) * 1900-01-01
DE1101566B (de) * 1959-12-10 1961-03-09 Concordia Maschinen Und Elek Z Lasttrenner mit schwenkbarem Hilfsmesser
US3005891A (en) * 1959-05-01 1961-10-24 Gen Electric Load break device
DE1132622B (de) * 1956-03-09 1962-07-05 Frobert Michaelis Dipl Ing Druckluftschalter, vorzugsweise Leistungs- oder Lasttrenn-schalter
FR1566368A (enrdf_load_stackoverflow) * 1968-02-12 1969-05-09
DE1665048A1 (de) * 1965-05-22 1971-01-28 Merlin Gerin Hochspannungs-Lasttrennschalter
FR2229131A1 (en) * 1973-05-11 1974-12-06 Alsthom Cgee High-voltage circuit breaker - with integral autopneumatic arc extinction

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT201158B (de) * 1956-03-09 1958-12-10 Frobert Dipl Ing Michaelis Druckluftschalter, vorzugsweise Leistungs- oder Lasttrenner
FR2285701A2 (fr) * 1974-09-19 1976-04-16 Alsthom Cgee Interrupteur autopneumatique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL40946C (enrdf_load_stackoverflow) * 1900-01-01
DE1132622B (de) * 1956-03-09 1962-07-05 Frobert Michaelis Dipl Ing Druckluftschalter, vorzugsweise Leistungs- oder Lasttrenn-schalter
US3005891A (en) * 1959-05-01 1961-10-24 Gen Electric Load break device
DE1101566B (de) * 1959-12-10 1961-03-09 Concordia Maschinen Und Elek Z Lasttrenner mit schwenkbarem Hilfsmesser
DE1665048A1 (de) * 1965-05-22 1971-01-28 Merlin Gerin Hochspannungs-Lasttrennschalter
FR1566368A (enrdf_load_stackoverflow) * 1968-02-12 1969-05-09
FR2229131A1 (en) * 1973-05-11 1974-12-06 Alsthom Cgee High-voltage circuit breaker - with integral autopneumatic arc extinction

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2695249A1 (fr) * 1992-09-03 1994-03-04 Alsthom Gec Disjoncteur haute ou moyenne tension a soufflage axial.
CN112585712A (zh) * 2018-08-16 2021-03-30 Abb瑞士股份有限公司 气体绝缘低压或中压负载断路开关
CN112585712B (zh) * 2018-08-16 2024-09-17 Abb瑞士股份有限公司 气体绝缘低压或中压负载断路开关
EP3916751A1 (en) * 2020-05-27 2021-12-01 Cooper Edison (Pingdingshan) Electronic Technologies Co., Ltd. An arc extinguishing nozzle and a load switch with the arc extinguishing nozzle

Also Published As

Publication number Publication date
NO881062L (no) 1988-09-12
FI880934A7 (fi) 1988-09-12
DE3743827C2 (enrdf_load_stackoverflow) 1989-03-30
FI880934A0 (fi) 1988-03-01
DE3743827A1 (de) 1988-09-22
NO881062D0 (no) 1988-03-10

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