EP3843117B1 - Lasttrennschalter ohne sf6-gas mit einem vakuumleistungsschalter für mittelspannungsschaltanlagen - Google Patents
Lasttrennschalter ohne sf6-gas mit einem vakuumleistungsschalter für mittelspannungsschaltanlagen Download PDFInfo
- Publication number
- EP3843117B1 EP3843117B1 EP19020727.4A EP19020727A EP3843117B1 EP 3843117 B1 EP3843117 B1 EP 3843117B1 EP 19020727 A EP19020727 A EP 19020727A EP 3843117 B1 EP3843117 B1 EP 3843117B1
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- EP
- European Patent Office
- Prior art keywords
- load
- contact
- switch
- break switch
- pair
- 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.)
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- 239000004020 conductor Substances 0.000 claims description 29
- 238000002955 isolation Methods 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 7
- 239000003989 dielectric material Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000011664 signaling Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 12
- 229910018503 SF6 Inorganic materials 0.000 description 11
- WRQGPGZATPOHHX-UHFFFAOYSA-N ethyl 2-oxohexanoate Chemical compound CCCCC(=O)C(=O)OCC WRQGPGZATPOHHX-UHFFFAOYSA-N 0.000 description 10
- 230000007246 mechanism Effects 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
Images
Classifications
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- 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
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
- H01H33/121—Load break switches
- H01H33/122—Load break switches both breaker and sectionaliser being enclosed, e.g. in SF6-filled container
-
- 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
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
-
- 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
- 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
- H01H33/6661—Combination with other type of switch, e.g. for load break switches
Definitions
- the present invention relates to electrical switching devices, and more particularly, relates to the development and operation of a load-break switch which includes a vacuum circuit interrupter allowing the safe interruption of the arc resulting when switching nominal load currents.
- Vacuum interrupters used for electrical switching devices, particularly in the 6 to 35 kV voltage range, are known in the prior art. Vacuum interrupters can be used for circuit-breakers, and for load-break switches and contactors.
- load switches are at least in the range of the middle voltage level (up to about 52 kV) often operated in a protective gas atmosphere of SF 6 , which quickly extinguishes the gas resulting from the switching arc and thus prevents destruction of the switch.
- SF 6 sulfur hexafluoride
- SF 6 gas insulated switches are no longer preferred due to the greenhouse gas effect of SF 6 (approximately 23,900 times that of CO 2 ).
- SF 6 is involved in the degradation and destruction of the ozone layer.
- switches incorporating SF 6 gas require sealing and such sealed switches generally attract higher maintenance costs to ensure proper operation through the lifetime of the switch.
- a further issue is the recent introduction of reporting requirements associated with such switches, requiring that the switching apparatus is checked annually to determine any leakage, which must then be reported. This reporting places a significant burden on the operators of any such switchgear.
- Vacuum interrupters have been widely employed in the art because they provide fast, low energy arc interruption with long contact life, low mechanical stress and a high degree of operating safety.
- a vacuum interrupter the contacts are sealed in a vacuum chamber.
- One of the contacts is a moveable contact having an operating member extending through a vacuum seal in the chamber.
- a known circuit breaker from EP-A-342 603 comprises two cartridges or vacuum bottles, arranged one above the other, within an elongate support, borne by a fixed insulating console 'a chassis.
- the aforementioned known circuit breaker is very large and bulky, and requires a large order of energy, almost double that of a single cartridge.
- the incorporation of such a circuit breaker in a cell poses serious problems plus the risk of overheating which are also double.
- EP-A-0433 184 a medium voltage electrical circuit breaker having per pole a support for a cartridge which contains a pair of separable arc contacts one of which is movable, and a mechanism of control for opening and closing the contacts.
- the cartridge is rigidly secured inside a sealed enclosure filled with a high dielectric strength gas and has an insulating jacket whose creepage distance corresponds to the dielectric withstand of the housing in the high dielectric strength gas.
- EP-B1- 0542 637 an electrical circuit breaker with two vacuum switch tubes connected in series by an electrical connection to increase the voltage withstand of the pole and which both comprise a movable contact, which two movable contacts are connected by a mechanical connection to open and close the two pairs of contacts simultaneously due to the action of an operating mechanism, a circuit breaker wherein the two cartridges are rigidly secured inside a sealed enclosure, filled with a high dielectric strength gas.
- EP 3 367 408 A1 discloses a load-break switch for medium-voltage switching systems comprising:an inner elongated insulating housing enclosing: a vacuum interrupter comprising a vacuum chamber containing a fixed contact electrically interconnected with a second conductive bar and a movable contact electrically connected to a flexible conductor and a first switch contact; a second switch contact electrically connected with a first conductive bar; a cam plate being rotatably connected to a drive shaft, wherein the drive shaft passes through a pass-through hole, wherein the cam plate includes the pass-through hole coaxially arranged around and mechanically coupled to the drive shaft; a pair of rotable blades being mechanically connected to one end of the cam plate; wherein said pair of rotable blades is movable by means of the drive shaft between a main current path in electrical communication with the fixed contact and an isolation path when the movable contact is spaced apart from the fixed contact, said drive shaft, on one side, causes said pair of rotable
- EP-B1- 2 789 000 discloses a switching device, more particularly a load interrupter switch, for medium-voltage switching systems comprising a moving contact which is rotatable by means of a rotary support arranged centrally between a first fixed contact and a second fixed contact, wherein a main current path is formed in a first position of the rotatable moving contact and an isolation path is formed in a second position of the rotatable moving contact, the rotatable moving contact is embodied as rotatable through 360°.
- a blow-out contact system comprises a vacuum interrupter having a contact system that is closable by means of a contact compression spring.
- a switch-disconnector is arranged in a housing which can be filled with an insulating gas or an insulating liquid.
- SF 6 encapsulated load switch or load switchgear by other switching means.
- the vacuum interrupters already used in the higher power range can be used.
- two contact elements are arranged via a metallic bellows or similar device movable in an evacuated space, typically a ceramic tube, which form the electrical contact when moving towards each other. Due to the high vacuum with very low residual pressure, the formation of a switching arc is prevented here, or it breaks down again in the absence of ionizable gas immediately after a natural zero crossing.
- the general objective of the present invention is to provide a load-break switch having a vacuum circuit interrupter for medium-voltage switching systems, which is inexpensive to produce in a compact design.
- a further objective of the present invention is to provide a compact load-break switch having a vacuum circuit interrupter for medium-voltage switching systems which is simplified in its parts with as few as possible of the same.
- the present invention relates to a load-break switch according to claim 1 having a vacuum circuit interrupter for medium-voltage switching systems.
- the load-break switch comprises an inner elongated insulating housing enclosing a vacuum interrupter comprising a vacuum chamber containing a fixed contact electrically interconnected with a first line terminal and a movable contact electrically connected to a flexible conductor and a first switch contact, a second switch contact electrically connected with a second load terminal, a pair of parallelly arranged rotable blades, wherein the pair of rotable blades is movable by a drive shaft between a main current path in electrical communication with the fixed contact and an isolation path when the movable contact is spaced apart from the fixed contact, said pair of rotable blades being connected to a pair of parallelly arranged cam plates enabling formation of the isolation path in the event of an extinguished arc or the main current path, said drive shaft in combination with said cam plates on one side, causes said pair of rotable blades to acquire said
- each of the rotable blades is in electrical contact with the first switch contact and an opposite end of each rotable blades is in electrical contact with the second switch contact, wherein the main current path is formed in a first position of the pair of rotatable blades and an isolation path is formed in a second position of the pair of rotatable blades, the pair of rotatable blades is embodied as rotatable by 90° around a perpendicular axis of the load-break switch.
- the present invention further relates to a load-break switch for medium-voltage switching systems according to claim 12 comprising at least one load-break switch.
- a load-break switch is necessary to connect or interrupt the supply when required. Typical reasons for interruption are to control a load, to respond to an overvoltage or to respond to an overload caused by a short circuit.
- the supply to be switched is generally a three-phase supply, requiring a conductor for each phase, and switching for the three phases.
- the load-break switch 100 for medium-voltage switching systems may comprise at least one load-break switch 1.
- the usual arrangement of a load-break switch 100 for a three-phase circuit consists of a set of three load-break switches 1 each having a vacuum circuit interrupter 4 for medium-voltage switching systems, one for each phase, a motor controller for controlling operation of a driving motor 6, measuring and signaling devices to detect events requiring interruption, a control unit and communication equipment to cause the driving motor to act when required.
- a control unit and communication equipment to cause the driving motor to act when required.
- all the equipment is conventionally housed in an enclosure.
- the control unit comprises a power supply such as battery arrangement connected to power supply such as a solar battery charger including a solar panel, a motor controller connected to the drive motor 6 for operating a mechanical arrangement 28 coupled to a drive shaft 27 providing initiating simultaneous switching operation of each load-break switch 1, and the communication equipment enabling connection to an operator interface for monitoring of distribution network.
- the control unit is designed to be operated locally and remotely. Measuring devices to detect events requiring interruption may include voltage, current, or other sensors for example to operate relays in protection systems.
- the load-break switch 100 for the three-phase circuit for medium-voltage switching systems shows an outer housing 7 in which a compact load-break switch 1 having the vacuum circuit interrupter 4 and centralized actuation according to the invention, is assembled.
- the outer housing 7 can alternatively provide in its interior an environment in dry air, such as to satisfy gas-pollution prevention requirements.
- three poles are provided, which are connected on the one hand to phases of a power supply and on the other to respective bars (not shown) of any user.
- the load-break switch 100 for medium-voltage switching systems may comprise at least one load-break switch 1.
- the outer housing 7 comprising at least one load-break switch 1 having environment in dry air, wherein an inner insulating housing 9 of each load-break switch 1 is made of a solid dielectric material.
- the load-break switch 1 having the vacuum circuit interrupter 4 shows the inner insulating housing 9 consisting of a first cover 10 and a second cover 11, said covers 10; 11 composed of two mutually tightly connected half-shells made of a solid dielectric material such as epoxy resin, said half-shells forming an interior 12 of the load-break switch 1.
- An environment in the interior 12 of the inner insulating housing 9 is dry air.
- the inner insulating housing 9 in a longitudinal direction, along a longitudinal axis, is elongated and in a transverse direction has significantly smaller thickness than length.
- the inner insulating housing 9 is generally shell shaped elongated housing.
- the inner insulating housing 9 encloses the vacuum interrupter 4 comprising a vacuum chamber 13 containing a fixed contact 20 electrically interconnected with a second conductive bar 16 and a movable contact 21 electrically connected to a flexible conductor 14 and a first switch contact 17, and a second switch contact 18 electrically connected with a first conductive bar 15, wherein the pair of rotable blades 26 is rotated by means of a pair of parallelly arranged cam plates 25 being rotatably connected to the drive shaft 27 between a main current path in electrical communication with the fixed contact 20 and an isolation path when the movable contact 21 is spaced apart from the fixed contact 20; wherein said pair of rotable blades 26 being mechanically connected to the pair of parallelly arranged cam plates 25 which rotation, on one side, causes electrical connection of the fixed contact 20 and the movable contact 21 to acquire said main current path and, on another side, spacing apart the fixed contact 20 and the movable contact 21 to acquire the isolation path.
- the pair of parallelly arranged cam plates 25 is arranged in the longitudinal direction perpendicular to the drive shaft 27 and the pair of rotable blades 26 is embodied as rotatable by 90° around the drive shaft 27. Further, the pair of parallelly arranged cam plates 25 and the pair of parallelly arranged rotable blades 26 are arranged parallel to each other.
- Each of the first conductive bar 15 and the second conductive bar 16 may include a which define the first conductive bar 15 and the second conductive bar 16, respectively.
- Each of the first conductive bar 15 and the second conductive bar16 may include a termination structured to electrically connect to a line power cable or a load power cable, or a connector structured to electrically connect to a line power bus or a load power bus.
- the drive shaft 27 passes through a pass-through hole 22 and is made of an insulting material, supported at its ends and rotatable by means of an operating mechanical arrangement 28 and the driving motor 6, either by local operation or a remote operation.
- switching operation may be performed manually by means of an operating handle 8 coupled to the drive shaft 27, said operating handle 8 is arranged at a back side of the load-break switch 100 for the three-phase circuit for medium-voltage switching systems.
- FIGS 7 to 11 show an operating mechanism inside of the inner insulating housing 9 in the interior 12.
- the vacuum circuit interrupter 4 includes a vacuum envelope or sealed vacuum chamber 13 containing the fixed contact 20 and the movable contact 21 movable along the longitudinal axis of the load-break switch 1 between a closed circuit position (as shown in Figure 7 ) in electrical communication with the fixed contact 20 and an open circuit position (as shown in Figure 8 ) spaced apart from the fixed contact 20.
- the fixed contact 20 is sealed within the vacuum chamber 13 and is connected to the second conductive bar 16 at one end thereof.
- the movable contact 21 is sealed within the vacuum chamber 13 and movable between a first position in electrical communication with the second conductive bar 16, and a second position, out of electrical communication with the second conductive bar 16.
- the movable contact 21 further includes a first movable electrical stem 29 electrically connected to the flexible conductor 14 at a first end thereof.
- the first movable electrical stem 29 sealable penetrates the vacuum chamber 13 and terminates at the first end of the flexible conductor 14.
- the flexible conductor 14 is in the longitudinal direction connected to a second movable stem 30 by fastening means 31.
- a spring 23 is positioned coaxial with the second movable stem 30.
- the second movable stem 30 at one end thereof includes a pair of sliding pins 32 extending from the second movable stem 30 in the transverse direction, said sliding pins 32 being integral part of the second movable stem 30.
- the spring 23 is subjected to stress as a result of the rotation of the drive shaft 27 which involves the rotation of the pair of cam plates 25 with the action of a cam grooves 33 on the pair of sliding pins 32, wherein each cam plate 25 comprises the cam groove 33.
- the pair of cam plates 25 is positioned in the longitudinal direction of the load-break switch and in parallel.
- Each of the cam plate 25, in fact, provides the cam groove 33 which movably houses each pin sliding 32 extending in the transverse direction.
- Each cam plate 25, in its cam groove 33, provides two dead points of opposite ends for each sliding pin 32.
- the forced shifting of each sliding pin 32 in each cam groove 33 commands the movement of first and second movable electrical stems 29;30 of the movable contact 21 and therefore the same movable contact 21 with respect to the fixed contact 20.
- Each cam plate 25 includes the pass-through hole 22 coaxially arranged around and mechanically coupled to the drive shaft 27. Further, each cam plate 25 at one end thereof is mechanically connected to the pair of parallelly arranged rotable blades 26 by means of one of a pair of transverse fastening means 34.
- a first end of each of the rotable blades 26 is in electrical contact with the first switch contact 17 and the other an opposite end of each of the rotable blades 26 is in electrical contact with the second switch contact 18, wherein the main current path is formed in the first position of the pair of rotatable blades 26 and the isolation path is formed in the second position of the pair of rotatable blades 26, the pair of rotatable blades 26 is embodied as rotatable by 90° around the drive shaft 27.
- the first position of the pair of rotatable blades 26, forming the main current path is when the pair of rotatable blades 26 is arranged in parallel with the longitudinal axis of the load-break switch 1, wherein the second switch contact 18, the pair of rotable blades 26, the first switch contact 17 and the flexible conductor 14 are in electrical contact, and due to the action of the spring 30, the movable contact 21 and fixed contact 20 are also in electrical contact.
- the second position of the pair of rotatable blades 26, forming the isolation current path when the movable contact 21 and fixed contact 20 are not in electrical contact is when the pair of rotatable blades 26 is arranged perpendicular in respect to the longitudinal axis of the load-break switch 1, wherein the second switch contact 18 and the pair of rotable blades 26 are not in electrical contact, and therefore due to the action of the pair of cam plates 25 each comprising the cam groove 33 which movably houses each sliding pin 32 commanding the movement of the first and second movable electrical stems 29;30 of the movable contact 21 and therefore the same movable contact 21 with respect to the fixed contact 20.
- the fixed contact 20, the movable contact 21, the flexible conductor 14, the first switch contact 17 and the second switch contact 18 are arranged along the longitudinal axis of the load-break switch 1.
- the second switch contact 18 has a generally U shape arranged perpendicular to the longitudinal axis of the load-break switch 1, wherein a first surface of the second switch contact 18 is positioned towards the interior 12 of the load-break switch 1, wherein a second surface of the second switch contact 18 is in electrical contact with the first conductive bar 15.
- the opposite end of pair of rotable blades 26, when rotating from the first position to the second position slide along the first surface of the second switch contact 18.
- An upper side of the pair of the rotatable blades 26 is enclosed by a voltage protective screen 19 which voltage protective screen 19 is fixed to the pair of the rotatable blades 26 and rotates together with the pair of the rotatable blades 26 by 90°.
- the flexible conductor 14 (e.g., a braided conductor; a laminated conductor) electrically connects the movable contact 21 and the first switch contact 17 in a linear or longitudinal direction between the closed-circuit position and the open-circuit position.
- a second opposite end of the flexible conductor 14 is by means of a fastening means 35 fixed to a first end of the first switch contact 17 and to a first end of a support 24 of the first switch contact 17 ensuring correct electrical contact.
- the support 24 of the first switch contact 17 has an L-profile and is made of an insulating material.
- a second opposite end of the support 24 of the first switch contact 17 also secures a middle part of the first switch contact 17, wherein the middle part of the first switch contact 17 is fixed to the second end of the support 24 by means of a fastening means 36.
- a second opposite end of the first switch contact 17 is arranged around the pass-through hole 22, wherein the second opposite end of the first switch contact 17 is in electrical contact with the pair parallelly arranged spaced apart rotable blades 26.
- the second end of flexible conductor 14, the first end of the first switch contact 17 and the first end of the support 24 are aligned next to each other in the longitudinal direction perpendicularly to the longitudinal axis.
- the first switch contact 17 has a curved shape and its first end is extending from the second opposite end of the flexible conductor 14 alongside a part of the flexible conductor 14 and the support 24 towards the pass-through hole 22, wherein the second opposite end of the first switch contact 17 is semicircular and semi-circularly encircles the pass-through hole 22.
- a width of the flexible conductor 14 is substantially the same a width of the first switch contact 17, and a width of the second switch contact 18 is such as to ensure correct electrical contact with the pair of parallelly arranged spaced apart rotable blades 26.
- the operating mechanism housed inside the inner insulating housing 9 is arranged between a pair of parallelly arranged protective plates 37.
- Said plates 37 are connected to the support 24 by a pair of transverse fastening means 38. Further, each of said plates 37 comprises the pass-through hole 22 positioned to enable passing through the drive shaft 27.
- Fastening means 34, 35, 36 and 38 are a screw fastening means or any suitable fastening means.
- the operative mechanism of the load-break switch 1 has additional fastening means (not shown in detail) that ensure connection of the pair of parallelly arranged protective plates 37.
- the single shaft allows there to be a central control which makes the whole assembly particularly simple. It should also be pointed out that the presence of a single control shaft gives great security to the assembly.
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Claims (14)
- Lasttrennschalter (1) für Mittelspannungsschaltanlagen, Folgendes umfassend:
ein inneres längliches Isoliergehäuse (9), das Folgendes umschließt:einen Vakuumunterbrecher (4), umfassend eine Vakuumkammer (13), die einen festen Kontakt (20), der elektrisch mit einem zweiten Leiterstab (16) verbunden ist, und einen bewegbaren Kontakt (21), der elektrisch mit einem flexiblen Leiter (14) und einem ersten Schaltkontakt (17) verbunden ist, enthält;einen zweiten Schaltkontakt (18), der elektrisch mit einem ersten Leiterstab (15) verbunden ist;ein Paar parallel angeordneter, voneinander beabstandeter Nockenscheiben (25), das drehbar mit einer Antriebswelle (27) verbunden ist, wobei die Antriebswelle (27) durch ein Durchgangsloch (22) verläuft, wobei jede der Nockenscheiben (25) das Durchgangsloch (22) beinhaltet, das koaxial um die Antriebswelle (27) herum angeordnet und mechanisch mit dieser gekoppelt ist;ein Paar drehbarer Schaufeln (26), das mechanisch mit einem Ende des Paares parallel angeordneter, voneinander beabstandeter Nockenscheiben (25) verbunden ist;wobei das Paar drehbarer Schaufeln (26) mittels der Antriebswelle (27) zwischen einem Hauptstrompfad in elektrischer Verbindung mit dem festen Kontakt (20) und einem Isolationspfad bewegbar ist, wenn der bewegbare Kontakt (21) von dem festen Kontakt (20) beabstandet ist, wobei die Antriebswelle (27) auf einer Seite bewirkt, dass das Paar drehbarer Schaufeln (26) den Hauptstrompfad einnimmt und auf einer anderen Seite den Isolationspfad einnimmt,ein Ende jeder der drehbaren Schaufeln (26) in elektrischem Kontakt mit dem ersten Schaltkontakt (17) steht und ein gegenüberliegendes Ende jeder der drehbaren Schaufeln (26) in elektrischem Kontakt mit dem zweiten Schaltkontakt (18) steht, wobei der Hauptstrompfad in einer ersten Position des Paares drehbarer Schaufeln (26) gebildet ist und ein Isolationspfad in einer zweiten Position des Paares drehbarer Schaufeln (26) gebildet ist, wobei das Paar drehbarer Schaufeln (26) um 90° um die Antriebswelle (27) drehbar ausgebildet ist, dadurch gekennzeichnet, dass der erste Schaltkontakt (17) eine gekrümmte Form aufweist und sich von einem zweiten gegenüberliegenden Ende des flexiblen Leiters (14) entlang eines Teils des flexiblen Leiters (14) in Richtung des Durchgangslochs (22) erstreckt, wobei ein zweites gegenüberliegendes Ende des ersten Schaltkontakts (17) halbkreisförmig ist und das Durchgangsloch (22) halbkreisförmig umgibt. - Lasttrennschalter (1) nach Anspruch 1, wobei jede der parallel angeordneten Nockenscheiben (25) eine Nockennut (33) beinhaltet, die in jeder Scheibe (25) ausgebildet ist, wobei ein Paar Gleitstifte (32), das in jede Nockennut (33) eingreift, integraler Bestandteil eines bewegbaren Schafts (30) ist, wobei sich die Gleitstifte (32) in einer Querrichtung senkrecht zu einer Längsachse des Lasttrennschalters (1) erstrecken, wobei der zweite bewegbare Schaft (30) mechanisch mit dem bewegbaren Kontakt (21) der Vakuumkammer (13) gekoppelt ist.
- Lasttrennschalter (1) nach Anspruch 1 und 2, wobei der bewegbare Kontakt (21) ferner einen ersten bewegbaren elektrischen Schaft (29) beinhaltet, der mit dem flexiblen Leiter (14) an einem ersten Ende davon elektrisch verbunden ist, wobei die andere Seite des ersten Endes des flexiblen Leiters (14) in einer Längsrichtung mit einem zusätzlichen bewegbaren Schaft durch Befestigungsmittel (31) verbunden ist, wobei zwischen dem ersten Ende des flexiblen Leiters (14) und dem zweiten bewegbaren Schaft (30) eine Feder (23) koaxial um den zusätzlichen bewegbaren Schaft positioniert ist.
- Lasttrennschalter (1) nach den Ansprüchen 1 bis 3, wobei die Antriebswelle (27) die Drehung des Paares Nockenscheiben (25) und die erzwungene Verschiebung jedes Gleitstifts (32) in jeder Nockennut (33) bereitstellt, die die Bewegung der bewegbaren elektrischen Schafte (29; 30) des bewegbaren Kontakts (21) und damit des bewegbaren Kontakts (21) in Bezug auf den festen Kontakt (20) steuert.
- Lasttrennschalter (1) nach Anspruch 1, wobei der feste Kontakt (20), der bewegbare Kontakt (21), der flexible Leiter (14), der erste Schaltkontakt (17) und der zweite Schaltkontakt (18) in Reihe entlang der Längsachse des Lasttrennschalters (1) angeordnet sind.
- Lasttrennschalter (1) nach Anspruch 1, wobei der zweite Schaltkontakt (18) eine allgemeine U-Form aufweist und senkrecht zur Längsachse des Lasttrennschalters (1) angeordnet ist, wobei eine erste Oberfläche des zweiten Schaltkontakts (18) in Richtung eines Innenraums (12) des inneren länglichen Isoliergehäuses (9) positioniert ist und eine zweite Oberfläche des zweiten Schaltkontakts (18) in elektrischem Kontakt mit dem ersten Leiterstab (15) steht, wobei das gegenüberliegende Ende jeder der drehbaren Schaufeln (26) beim Drehen von der ersten Position in die zweite Position entlang der ersten Oberfläche des zweiten Schaltkontakts (18) gleitet.
- Lasttrennschalter (1) nach Anspruch 1, wobei zwischen dem zweiten gegenüberliegenden Ende des flexiblen Leiters (14) und dem ersten Schaltkontakt (17) ein Träger (24) angeordnet ist, das zweite gegenüberliegende Ende des flexiblen Leiters (14) mit Befestigungsmitteln (35) an einem Ende des ersten Schaltkontakts (17) und an einem ersten Ende des Trägers (24) befestigt ist, ein Mittelteil des ersten Schaltkontakts (17) mit Befestigungsmitteln (36) an einem zweiten Ende des Trägers (24) befestigt ist, wobei der Träger (24) eine L-Profilform aufweist.
- Lasttrennschalter (1) nach den vorhergehenden Ansprüchen, wobei der flexible Leiter (14) und der erste Schaltkontakt (17) im Wesentlichen die gleiche Breite aufweisen und eine Breite des zweiten Schaltkontakts (18) derart ist, dass ein korrekter elektrischer Kontakt mit dem Paar voneinander beabstandeter drehbarer Schaufeln (26) gewährleistet ist.
- Lasttrennschalter (1) nach einem der vorhergehenden Ansprüche, wobei das innere Isoliergehäuse (9) eine erste Abdeckung (10) und eine zweite Abdeckung 11 beinhaltet, wobei die Abdeckungen (10; 11) aus zwei fest miteinander verbundenen Halbschalen aus einem festen dielektrischen Material bestehen, wobei das innere Isoliergehäuse (9) eine Umgebung in trockener Luft aufweist.
- Lasttrennschalter (1) nach einem der vorhergehenden Ansprüche, wobei das innere Isoliergehäuse (9) mit zwei isolierten konischen Endabdeckungen (2; 3) verbunden ist, wobei die Endabdeckungen (2; 3) aus dem festen dielektrischen Material hergestellt sind.
- Lasttrennschalter (1) nach einem der vorhergehenden Ansprüche, wobei eine Oberseite des Paares drehbarer Schaufeln (26) von einem Spannungsschutzschirm (19) umgeben ist, der Spannungsschutzschirm (19) an dem Paar drehbarer Schaufeln (26) befestigt ist und sich zusammen mit dem Paar drehbarer Schaufeln (26) um 90° dreht.
- Lasttrennschalter (100) für Mittelspannungsschaltanlagen, umfassend mindestens einen Lasttrennschalter (1) nach einem der vorhergehenden Ansprüche 1 bis 11.
- Lasttrennschalter (100) für Mittelspannungsschaltanlagen nach Anspruch 12, wobei er ferner eine Motorsteuerung zum Steuern des Betriebs eines Antriebsmotors (6), Mess- und Signalvorrichtungen zum Erkennen von Ereignissen, die eine Unterbrechung erfordern, eine Steuereinheit und Kommunikationsgeräte, die den Anschluss an eine Bedienerschnittstelle zur Überwachung des Verteilungsnetzes ermöglichen und den Antriebsmotor (6) bei Bedarf zum Handeln veranlassen, umfasst, wobei die mit dem Antriebsmotor (6) verbundene Motorsteuerung zum Betreiben einer mit der Antriebswelle (27) gekoppelten mechanischen Anordnung (28) ein Auslösen eines gleichzeitigen Schaltvorgangs jedes Lasttrennschalters (1) bereitstellt, wobei die Steuereinheit so konzipiert ist, dass sie lokal und ferngesteuert betrieben werden kann.
- Lasttrennschalter (100) für Mittelspannungsschaltanlagen nach Anspruch 12, wobei er ferner ein äußeres Gehäuse (7) umfasst, das mindestens einen Lasttrennschalter (1) umfasst, wobei ein Innenraum des äußeren Gehäuses (7) eine Umgebung in trockener Luft aufweist, wobei das innere Isoliergehäuse (9) jedes Lasttrennschalters (1), die eine Umgebung in trockener Luft aufweist, aus einem festen dielektrischen Material besteht.
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EP19020727.4A EP3843117B1 (de) | 2019-12-24 | 2019-12-24 | Lasttrennschalter ohne sf6-gas mit einem vakuumleistungsschalter für mittelspannungsschaltanlagen |
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JP2610299B2 (ja) | 1988-05-16 | 1997-05-14 | 株式会社東芝 | 真空遮断器 |
FR2655766B1 (fr) | 1989-12-11 | 1993-09-03 | Merlin Gerin | Disjoncteur hybride moyenne tension. |
FR2682807B1 (fr) | 1991-10-17 | 1997-01-24 | Merlin Gerin | Disjoncteur electrique a deux cartouches a vide en serie. |
GB2300305B (en) * | 1995-04-27 | 1999-04-28 | Gec Alsthom Ltd | Circuit interrupter arrangement |
WO2011147717A1 (de) * | 2010-05-25 | 2011-12-01 | Siemens Aktiengesellschaft | Lasttrennschalter |
DE202010009448U1 (de) * | 2010-06-23 | 2010-09-09 | Ipt International Power & Technology Gmbh | Hochspannungsschaltvorrichtung |
CN103608883B (zh) * | 2011-06-16 | 2016-01-20 | Abb技术有限公司 | 开关装置和开关设备 |
DE102012200962B4 (de) | 2012-01-24 | 2018-07-26 | Siemens Aktiengesellschaft | Schaltgerät, insbesondere Lasttrennschalter, für Mittelspannungs-Schaltanlagen |
IT201700020449A1 (it) * | 2017-02-23 | 2018-08-23 | Giampietro Tosi | Gruppo interruttore in vuoto con sezionatore per media tensione |
CN106953264A (zh) * | 2017-04-05 | 2017-07-14 | 珠海航天科创实业有限公司 | 一种环保气体绝缘开关柜 |
CN109637888A (zh) * | 2018-12-17 | 2019-04-16 | 江苏大烨智能电气股份有限公司 | 一种环保型气体绝缘断路器开关 |
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