EP1218906A1 - Hochspannungsleistungsschalter - Google Patents
HochspannungsleistungsschalterInfo
- Publication number
- EP1218906A1 EP1218906A1 EP00982936A EP00982936A EP1218906A1 EP 1218906 A1 EP1218906 A1 EP 1218906A1 EP 00982936 A EP00982936 A EP 00982936A EP 00982936 A EP00982936 A EP 00982936A EP 1218906 A1 EP1218906 A1 EP 1218906A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- arcing contact
- contact piece
- region
- nozzle arrangement
- circuit breaker
- 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
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
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
- H01H33/7023—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle
-
- 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
- H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
Definitions
- the invention relates to a high-voltage circuit breaker with a first arcing contact piece and a second arcing contact piece, which face each other, of which at least the first arcing contact piece can be driven, and with an insulating nozzle arrangement which is connected to the first drivable arcing contact piece and has an axial outflow channel for guiding a quenching gas, and with a boiler room in which quenching gas heated by an arc between the two arcing contact pieces can be stored and which is connected to the outflow duct of the insulating nozzle arrangement by means of an annular duct, the outflow duct being blocked by the second arcing contact piece in the switched-on state, the outflow duct of the insulating nozzle arrangement having a first, the free end of the first arcing contact piece facing substantially cylindrical region and adjacent one, in diameter compared to the e rsten area has expanded second area.
- Such a high-voltage circuit breaker is known, for example, from WO 99/44213.
- an arc is drawn between the arcing contact pieces in the arcing space surrounded by the insulating nozzle arrangement during the switching-off process and the quenching gas SF6 located there is heated by the arcing.
- the heated and thereby expanded quenching gas is diverted through a heating duct into a boiler room, where it is available for subsequent blowing of the arc. If the current to be switched passes zero, the arc extinguishes and the quenching gas pressure in the arc chamber drops, so that at this point the high-pressure quenching gas flows from the heating chamber via the ring channel to the arc chamber between the arcing contact pieces and can successfully prevent the arc from reigniting there ,
- the attenuation of the opening of the insulating nozzle arrangement by the second arcing contact piece means that the quenching gas heated by the arc cannot initially flow out through the outflow opening, but rather flows as completely as possible to the boiler room.
- the essential portion of the energy required for blowing the arc is provided by the arc itself, ie by the arc gas generated by the arc.
- a large arc room has so far been viewed as cheap for blowing the arc.
- the diameter of the second arcing contact piece was dimensioned large, in particular for higher voltages, in order to be able to carry out peaks and edges there with a large radius of curvature, so that dielectric problems could be avoided at this point.
- the present invention is therefore based on the object of improving the switching capacity in the case of a high-voltage circuit breaker of the type mentioned at the outset, in particular at high currents, such as occur, for example, in the event of a terminal short circuit.
- the object is achieved in that the distance between the first arcing contact piece and the second area minus the width, which the ring channel has at its confluence with the outflow channel of the insulating nozzle arrangement, is greater than twice the diameter of the outflow channel in its first area, whereby the diameter of the outflow channel in the first region is less than 30 mm, in particular less than 25 mm.
- An advantageous embodiment of the invention provides that the second arcing contact piece is assigned a field electrode for shielding the electrical field, which can be driven at a speed different from the speed of the insulating nozzle arrangement.
- the second arcing contact piece is additionally dielectrically shielded and, in particular, because the field electrode can be driven at a different speed than the insulating nozzle arrangement, an optimum dielectric configuration is made possible at all times during the switching process.
- the speed profile of the field electrode can be optimally matched to the movement of the insulating nozzle arrangement.
- the field electrode can be moved either by means of its own drive, for example by means of an electrodynamic drive, or by means of a gear through the switch drive.
- a further advantageous embodiment provides that the second arcing contact piece is designed as a cylindrical pin, which is rounded at its end facing the first arcing contact piece.
- the arcing contact piece is designed as a cylindrical pin which, at its end facing the first arcing contact piece, has a first section with a reduced diameter compared to the other sections.
- a further advantageous embodiment of the invention provides that the second arcing contact piece can be driven by means of a transmission element coupled to the insulating nozzle arrangement and a gear connected to it.
- the second arcing contact piece can be driven by means of the switch drive via the transmission element and a transmission, and the speed profile of the second arcing contact piece can also be determined via the design of the transmission.
- the arc time during which the first region of the outflow opening is still blocked by the second arcing contact piece can also be determined by means of the movement profile of the second arcing contact piece.
- Field electrode is drivable.
- the gear unit can be designed in such a way that the field electrode can be driven together with the second arcing contact piece or with a movement profile other than this.
- an optimal dielectric arrangement can be generated at any time during the switching process.
- the invention can also be advantageously configured in that the insulating nozzle arrangement consists of PTFE.
- the insulating nozzle arrangement is made of PTFE (polytetrafluoroethylene)
- PTFE polytetrafluoroethylene
- the insulating nozzle arrangement consists of a main nozzle and an auxiliary nozzle directly surrounding the first arcing contact piece, the annular channel being formed between the main nozzle and the auxiliary nozzle.
- the invention also relates to a high-voltage circuit breaker with a first arcing contact piece and a second arcing contact piece, which face each other, at least the first arcing contact piece being drivable, and with an insulating nozzle arrangement which is connected to the drivable first arcing contact piece and which has an axial outflow channel for guiding a quenching gas.
- Extinguishing gas heated between the arcing contact pieces can be stored and is connected to the outflow duct of the insulating nozzle arrangement by means of at least one duct, the outflow duct of the insulating nozzle arrangement having a first, essentially cylindrical region, at its end opposite the first arcing contact piece with respect to the diameter the second region is expanded by the second region, the first region being blocked by the second arcing contact piece in the switched-on state, the length of the first region being greater than twice the diameter of the first region and the diameter of the first region being less than 30 mm, in particular is less than 25 mm.
- Such an embodiment of the invention can provide, for example, that the channel which connects the heating chamber and the outflow channel of the insulating nozzle arrangement is designed in the form of a plurality of partial channels which open out on the circumferential surface of the outflow opening and over its circumference.
- the length of the first cylindrical region of the outflow opening of the insulating nozzle arrangement is equal to the distance between the first arcing contact piece and the first region of the outflow opening, since in this case it is not necessary to deduct the width of an annular duct opening into the outflow duct.
- FIG. 1 shows the interrupter unit of a high-voltage circuit breaker, partly schematically in section, with a second arcing contact piece tapered in its front area
- FIG. 2 shows an arrangement with a non-tapered second one
- Arcing contact piece which is drivable and with a drivable field electrode
- FIG. 3 shows the arrangement from FIG. 1 with an outflow channel which is connected to the boiler room by means of a plurality of channels distributed over its circumference.
- two arcing contact pieces 1, 2 coaxially face each other in an insulating circuit breaker housing 18, which is made, for example, of porcelain or a composite material.
- the first arcing contact piece 1 can be driven by means of a switch drive (not shown), which can be designed, for example, as a hydraulic drive or as a spring-loaded drive, or also as an electrodynamic drive, while the second arcing contact piece 2, which has the shape of a contact pin, is designed to be stationary.
- a main nozzle 3a is firmly connected as part of an insulating nozzle arrangement 3, which consists of polytetraflurethylene.
- the insulating nozzle arrangement 3 has an outflow channel 6, which in the switched-on state when the two arcing contact pieces 1, 2 are in contact with one another stand handle, is penetrated by the second arcing contact piece 2 and blocked.
- the insulating nozzle arrangement in the region of the main nozzle 3a has a first, essentially cylindrical region 6a, which extends from the end face of the first arcing contact piece 1 through the first nozzle 3b to the beginning of a second region 6b, which has an enlarged diameter compared to the first region 6a extends.
- the outflow channel has an insignificantly larger diameter than the second arcing contact piece 2 in its second section.
- the end of the second arcing contact piece can have a first section 7 with a reduced diameter compared to the second section 8.
- This first section 7 of the second arcing contact piece 2 serves, on the one hand, to partially dam the outflow channel 6 at the end of the switch-off movement, after which the complete dam is given up by the second section 8, and thus an extinguishing gas flow through the outflow channel 6 in several steps on the other hand, to create a design that is as dielectric as possible at the end of the second arcing contact piece 2 that faces the first arcing contact piece 1.
- a first continuous current contact piece 12 and a second continuous current contact piece 13 are arranged radially outside of the insulating nozzle arrangement 3 and surrounding it, which are also in contact with one another in the switched-on state and carry the nominal current.
- a heating chamber 16 is formed, which is connected via an annular channel 15 to the outflow channel 6 of the nozzle or between the Arc contact pieces 1, 2 formed arc space is connected.
- An arcing 4 can occur between the arcing contact pieces 1, 2 during the stopping movement, which in the
- the quenching gas can then flow out through the annular duct 15 into the heating chamber 16 and is temporarily stored there until the arc 4 extinguishes due to a current zero crossing of the current to be switched and the quenching gas flows out of the heating chamber 16 through the annular duct 15 into the arc chamber 5, in order to be there bring about rapid cooling and thus prevent the back ignition of an arc 4.
- the outflow channel 6 is still blocked by the second arcing contact 2.
- the diameter of the first region 6a of the outflow channel 6 corresponds essentially to the outer diameter of the second region 8 of the second arcing contact piece 2.
- the length of the first area 6a of the outflow channel 6, measured from the end face of the first arcing contact piece 1 to the beginning of the enlarged area 6b of the outflow channel 6 of the insulating nozzle arrangement 3, corresponds to at least twice the diameter of the first area 6a of the outflow opening 6.
- the outflow opening 6 is blocked for a sufficiently long time by the second section 8 of the second arcing contact piece 2 in order to adequately heat extinguishing gas by the arc 4 before the outflow opening is opened. Opening 6 and thus allow sufficient storage of extinguishing gas in the boiler room 16.
- Ring channel 15 measured in the axial direction of the outflow channel 6, the less PTFE surface is available for the action of the arc 4. This width of the arc is therefore taken into account when dimensioning the length of the first region 6a of the outflow opening 6.
- a second phase of the switch-off movement begins with the separation of the second section 8 of the second arcing contact piece 2 from the first region 6a of the outflow duct 6.
- the first section 7 with a reduced diameter of the second arcing contact piece 2 is still located in the first region 6a of the outflow channel 6, so that the outflow opening is only partially blocked and an extinguishing gas flow through the outflow channel 6 is started.
- the diameter of the first section 6a of the outflow channel 6 is chosen to be less than 30 mm, a particularly strong pressure increase in the arc space or in the outflow channel 6 is achieved, which has a positive effect on the switching capacity at high currents.
- the dimensioning of the diameter ⁇ 25 mm has proven to be particularly advantageous.
- FIG. 2 Another embodiment of the invention is shown in FIG. 2, the main focus being that the second arcing contact piece 2a does not have several sections with different diameters, but is only rounded at its end facing the first arcing contact piece 1, and that second arcing contact piece 2a can be driven separately by means of a gear 22, the gear 22 being driven by means of a transmission element 21 in the form of a rod fastened to the insulating nozzle arrangement 3.
- a field electrode 20 is provided which surrounds the second arcing contact piece 2a and shields it dielectrically and which can also be driven by means of the gear 22.
- the gear mechanism 22 has various levers 23, 24, which allow different movement profiles for the electrode 20 and the second arcing contact piece 2a. Because of the more precise description of the transmission 22, reference is made to the German utility model 299 01 205.0.
- FIG. 3 shows an embodiment which essentially corresponds to that shown in FIG. 1, but with the second arcing contact piece 2a without an Most, reduced diameter section 7, but is only formed with an end rounding.
- the channels or an annular channel run between the insulating nozzle arrangement and the first arcing contact piece.
Landscapes
- Circuit Breakers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19948687A DE19948687C1 (de) | 1999-09-30 | 1999-09-30 | Hochspannungsleistungsschalter |
DE19948687 | 1999-09-30 | ||
PCT/DE2000/003431 WO2001024211A1 (de) | 1999-09-30 | 2000-09-26 | Hochspannungsleistungsschalter |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1218906A1 true EP1218906A1 (de) | 2002-07-03 |
EP1218906B1 EP1218906B1 (de) | 2003-04-23 |
Family
ID=7925066
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00982936A Revoked EP1218906B1 (de) | 1999-09-30 | 2000-09-26 | Hochspannungsleistungsschalter |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1218906B1 (de) |
AU (1) | AU1991701A (de) |
DE (2) | DE19948687C1 (de) |
WO (1) | WO2001024211A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3590120B1 (de) * | 2017-03-02 | 2021-02-17 | ABB Power Grids Switzerland AG | Hochspannungsleistungsschalter mit erhöhter robustheit |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29609909U1 (de) * | 1996-05-24 | 1996-08-22 | Siemens AG, 80333 München | Hochspannungs-Leistungsschalter mit einer Isolierstoffdüse |
DE19809088C1 (de) * | 1998-02-25 | 1999-09-30 | Siemens Ag | Hochspannungsleistungsschalter mit einer Isolierstoffdüse |
DE29901205U1 (de) * | 1999-01-15 | 1999-05-12 | Siemens AG, 80333 München | Hochspannungsleistungsschalter, insbesondere Druckgasleistungsschalter |
-
1999
- 1999-09-30 DE DE19948687A patent/DE19948687C1/de not_active Expired - Fee Related
-
2000
- 2000-09-26 EP EP00982936A patent/EP1218906B1/de not_active Revoked
- 2000-09-26 AU AU19917/01A patent/AU1991701A/en not_active Abandoned
- 2000-09-26 DE DE50001913T patent/DE50001913D1/de not_active Expired - Fee Related
- 2000-09-26 WO PCT/DE2000/003431 patent/WO2001024211A1/de not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO0124211A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2001024211A1 (de) | 2001-04-05 |
AU1991701A (en) | 2001-04-30 |
EP1218906B1 (de) | 2003-04-23 |
DE19948687C1 (de) | 2001-02-15 |
DE50001913D1 (de) | 2003-05-28 |
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