EP3504726B1 - Schalter und verfahren zum trennen eines schalters - Google Patents

Schalter und verfahren zum trennen eines schalters Download PDF

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Publication number
EP3504726B1
EP3504726B1 EP17755157.9A EP17755157A EP3504726B1 EP 3504726 B1 EP3504726 B1 EP 3504726B1 EP 17755157 A EP17755157 A EP 17755157A EP 3504726 B1 EP3504726 B1 EP 3504726B1
Authority
EP
European Patent Office
Prior art keywords
contact
commutation
contact element
switch
commutation contact
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.)
Active
Application number
EP17755157.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3504726A1 (de
Inventor
Hauke Peters
Horst Schalber
Michael Mann
Ralph Uhl
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.)
Hitachi Energy Ltd
Original Assignee
ABB Power Grids Switzerland AG
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Filing date
Publication date
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Publication of EP3504726A1 publication Critical patent/EP3504726A1/de
Application granted granted Critical
Publication of EP3504726B1 publication Critical patent/EP3504726B1/de
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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
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/40—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/38—Plug-and-socket contacts
    • H01H1/385—Contact arrangements for high voltage gas blast circuit breakers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3052—Linear spring motors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/06—Energy stored by deformation of elastic members by compression or extension of coil springs

Definitions

  • the invention relates to the field of switches, in particular disconnectors, combined disconnectors and earthing switches, circuit breakers and / or earthing switches, further in particular disconnectors, combined disconnectors and earthing switches, circuit breakers and / or earthing switches for high voltages.
  • the invention particularly relates to a switch and a method for disconnecting a switch.
  • the invention relates to a switch that has a snap connection and a method of disconnecting a switch that includes releasing a snap connection.
  • Electrical switches such as circuit breakers, are used to open (or close) circuits by separating (or closing) electrical components.
  • an isolating switch can be used to isolate a circuit.
  • a circuit breaker is used to open and / or close a connection when no current or only a very small current is flowing, for example after the current flow has been switched off or before the current flow has been switched on. This distinguishes a circuit breaker from a circuit breaker, which is used to switch on and / or switch off the current flow even at higher currents.
  • an arc i.e.
  • a self-sustaining gas discharge that has a sufficiently high electrical potential difference to maintain the required high current density through impact ionization, can arise between commutation contact elements or between commutation contact elements and a housing of the switch.
  • the arc can damage or even destroy the commutation contact elements or the housing.
  • the circuit breaker has two electrical arcing contacts which are designed to be brought during an opening process by relative displacement in translation along a central axis of these arcing contacts from a closed position to an open position, one of the two electrical arcing contacts being a movable arcing contact, the an integral part of is an electrically conductive movable assembly that also includes another body that is slidably mounted relative to the movable arcing contact in a direction of movement of that electrically conductive assembly.
  • a switch and a method of disconnecting a switch are provided which solve at least some of the problems in the prior art.
  • a switch comprising a housing, a first contact arrangement which has a first contact element or commutation contact element and a first contact, and a second contact arrangement which has a second contact element or commutation contact element and a second contact.
  • the switch further comprises a nominal contact arrangement for transmitting the electrical power when the switch is in operation when it is closed.
  • the first contact is movable along an axis between a closed contact position in which the first contact contacts the second contact and an open contact position in which the first contact is separated from the second contact.
  • the first commutation contact element is movable along an axis between a closed commutation contact element position, in which the first commutation contact element contacts the second commutation contact element, and an open commutation contact element position, in which the first commutation contact element is separated from the second commutation contact element.
  • the first commutation contact element and the second commutation contact element are designed to form a snap connection with one another in the closed commutation contact element position.
  • the first commutation contact element is coupled to the first contact via a first stop, a second stop and an elastic element, such that a) when the first contact is moved towards the closed contact position, the first stop moves the first commutation contact element towards the closed one Takes along the commutation contact element position, b) when the first contact is moved from the closed contact position towards the open contact position with an existing snap connection, the elastic element biases the first commutation contact element towards the open commutation contact element position, c) if the first contact exceeds a defined stop position during the movement towards the open contact position, the second stop takes the first commutation contact element with it in the direction of the open commutation contact element position in order to release the snap connection.
  • the speed for opening the commutation contact elements can be increased. This can reduce the risk of an arc occurring. Furthermore, the risk of an arc occurring when the switch is closed can also be reduced.
  • a method for disconnecting a switch comprises a housing, a first contact arrangement which has a first commutation contact element and a first contact, and a second contact arrangement which has a second commutation contact element and a second contact, the first contact protruding from the first commutation contact element in the direction of the second contact arrangement and the second contact protrudes from the second commutation contact element in the direction of the first contact arrangement.
  • the switch further comprises a nominal contact arrangement for transmitting the electrical power when the switch is in operation when it is closed.
  • the separation takes place from a closed commutation contact element position, in which the first commutation contact element contacts the second commutation contact element, to an open commutation contact element position, in which the first commutation contact element is separated from the second commutation contact element.
  • the method comprises moving, at a first speed, the first contact when there is a snap connection between the first commutation contact element and the second commutation contact element along an axis from a closed contact position, in which the first contact contacts the second contact, to an open contact -Position in which the first contact is separated from the second contact.
  • the elastic element biases the first commutation contact element in the direction of the open commutation contact element position. If the first contact exceeds a defined stop position during the movement towards the open contact position, the snap connection is released and the first commutation contact element is moved towards the open commutation contact element position at a second speed, the second speed being greater than the first Speed is.
  • a distance between the first contact and the second contact is significantly smaller than a distance between the first commutation contact element and the second commutation contact element in the direction of the axis.
  • the switch when the switch is closed, the first contact and the second contact contact (touch) one another before the first commutation contact element and the second commutation contact element.
  • an arc is specifically formed between the first contact and the second contact, as a result of which the first commutation contact element and the second commutation contact element are protected from damage by erosion and the like during operation of the switch.
  • the electrical connection between the first contact and the second contact is interrupted before the electrical connection between the first commutation contact element and the second commutation contact element.
  • This constellation is advantageous to ensure that an arc is formed between the first commutation contact element and the second commutation contact element, so that the first contact and the second contact are or are protected from damage during operation of the switch.
  • FIG. 1 shows schematically a partial view of a switch 100.
  • the switch 100 comprises a housing 105, a first contact arrangement 110 and a second contact arrangement 120, as well as a nominal contact arrangement 117, 115, 124, which will be discussed in more detail later.
  • the switch 100 is shown in an open switch position in which the first contact arrangement 110 and the second contact arrangement 120 are separated from one another.
  • the first contact arrangement 110 has a first contact element 112 or commutation contact element 112
  • the second contact arrangement 120 has a second contact element 122 or commutation contact element 122.
  • the first commutation contact element 112 and the second commutation contact element 122 are also arranged in an open commutation contact element position in which the first commutation contact element 112 is separated from the second commutation contact element 122.
  • the first contact arrangement 110 has a first contact 114 and the second contact arrangement 120 has a second contact 124.
  • the first contact 114 and the second contact 124 are also arranged in an open contact position in which the first contact 114 is separated from the second contact 124.
  • the first commutation contact element 112 is movable along an axis A.
  • the axis A can extend from the first contact arrangement 110 to the second contact arrangement 120.
  • the first commutation contact element 112 is between the open commutation contact element position and the closed commutation contact element position in which the first commutation contact element 112 contacts the second commutation contact element 122 (see FIG Figure 2 ), movable along axis A.
  • first commutation contact element 112 and the second commutation contact element 114 are in the closed commutation contact element position, a current, in particular a commutation current when the switch 100 is opened, can flow via the first commutation contact element 112 and the second commutation contact element 114.
  • a current in particular a commutation current when the switch 100 is opened, can flow via the first commutation contact element 112 and the second commutation contact element 114.
  • no or only a very low current preferably flows via the first commutation contact element 112 and the second commutation contact element 114.
  • the first commutation contact element 112 and the second commutation contact element 114 can be consumable contacts or commutation contacts, in particular for opening the switch 100.
  • the first contact 114 is movable along the axis A.
  • the first contact 114 is movable between the open contact position and a closed contact position in which the first contact 114 contacts the second contact 124.
  • the first contact 114 is between the open contact position and a closed contact position in which the first contact 114 contacts the second contact 124, movable along axis A. If the first contact 114 and the second contact 124 are in the closed contact position, a current, in particular a commutation current when the switch 100 is closed, can flow via the first contact 114 and the second contact 124. In the closed switch position, however, preferably no or only a very low current flows via the first contact 114 and the second contact 124. In normal operation, therefore, no nominal current preferably flows via the first contact 114 and the second contact 124 and the second contact 124 can be consumable contacts or commutation contacts, in particular for closing the switch 100.
  • the first commutation contact element 112 and the second commutation contact element 122 are designed to form a snap connection with one another in the closed commutation contact element position.
  • a “snap connection” can be understood as a functional element for the detachable, simple form-fitting joining of components, such as the first commutation contact element 112 and the second commutation contact element 122.
  • at least one joining part such as the first commutation contact element 112 and / or the second commutation contact element 122, can be elastically deformed and then become detachably hooked.
  • the first contact group 110 can have a contact part 115 and / or a first diverting contact 117.
  • the contact part 115 can contact the first diverter contact 117.
  • the second contact group 120 can have a second diverter contact 127.
  • the contact part 115 can be movable along the axis A between a closed contact part position in which the contact part 115 makes contact with the second diverting contact 127, and an open contact part position in which the contact part 115 is separated from the second diverting contact 127.
  • the contact part 115 can thus form a stable electrical connection between the first diverting contact 117 and the second diverting contact 127.
  • the switch can be in the closed contact part position when the switch position is closed and / or be in the open contact part position when the switch position is open.
  • the contact part 115 can be moved together with the first contact 114.
  • the switch 100 can thus be designed in such a way that the nominal current flow takes place via the contact part 115.
  • the contact part 115 can therefore be a nominal contact.
  • the switch 100 can be for a nominal current flow of equal to or greater than 100 A, in particular equal to or greater than 1000 A, typically equal to or greater than 1600 A, and / or for a nominal current flow of equal to or less than 4000 A and / or a voltage of equal to or greater than 52 kV, typically equal to or greater than 100 kV, be designed.
  • switchgear assemblies that are particularly compact in terms of dimensions can be implemented. Since the demand for particularly compact switchgear assemblies is particularly great in comparison with high-voltage switchgear assemblies with nominal voltages of approximately 170kV and higher, the present invention enables this continuing need to be satisfied.
  • the first diverting contact 117 and / or the second diverting contact 127 can be designed as one or more spiral contacts 117, 127.
  • the diverting contacts 117, 127 can be designed to feed the nominal current to the contact part 115 and / or to divert it from it.
  • the first contact group 110 also has an elastic element 116.
  • the elastic element 116 can be a compression spring 116, for example.
  • the elastic element 116 can be connected to the first commutation contact element 112.
  • the first contact group 110 can have a first stop 118 and a second stop 119.
  • the elastic element 116 can be mounted or clamped between the first stop 118 and the second stop 119.
  • the elastic element 116 can be tensioned and / or the elastic element 116 can be relaxed when the first stop 118 and the second stop 119 move away from one another.
  • the elastic element 116 can thus build up a force which moves the first stop 118 and the second stop 119 away from one another.
  • the first stop 118 can be connected to the first commutation contact element 112 in such a way that they can be moved together.
  • the second stop 119 can be connected, for example, to a housing 111 of the first contact arrangement 110. In particular, the second stop 119 can be moved together with the first contact 114.
  • the first commutation contact element 112 and / or the first stop 118 can also be moved against the housing 111 of the first contact arrangement 110.
  • the first commutation contact element 112 can be coupled to the first contact 114 via the first stop 118, the second stop 119 and the elastic element 116 such that a) when the first contact 114 moves towards the closed contact position the first stop 118 takes the first commutation contact element 112 with it to the closed commutation contact element position, b) when the first contact 114 is moved from the closed contact position towards the open contact position with an existing snap connection, the elastic element 116 the first commutation contact element 112 biases towards the open commutation contact element position, and c) if the first contact 114 exceeds a defined stop position during the movement towards the open contact position, the second stop 119 the first commutation contact element 112 towards the open Neten commutation contact element position takes away to release the snap connection.
  • the switch 100 can be a disconnector, a combined disconnector and earthing switch (also known as a combination disconnector), a circuit breaker or an earthing switch.
  • the switch 100 can be a circuit breaker, a circuit breaker or an earthing switch for high voltage.
  • a high voltage can be a voltage equal to or greater than 1 kV, in particular equal to or greater than 52 kV.
  • the switch 100 can be a gas-filled switch 100 which is filled with a dielectrically insulating medium or gas.
  • the dielectrically insulating medium or gas in switch 100 can be SF 6 gas or any other dielectric insulating medium or arc extinguishing medium, be it gaseous and / or liquid.
  • a dielectric insulation medium or insulation gas can comprise, for example, an organic fluorine compound selected from the group consisting of: a fluorine ether, an oxirane, a fluoramine, a fluoroketone, a fluoroolefin, a fluoronitrile, and mixtures and / or decomposition products of these substances.
  • fluoroether refers to at least partially fluorinated substances.
  • fluoroether includes Fluoropolyethers (eg Galden) and fluoromonoethers as well as hydrofluoroethers and perfluoroethers
  • oxirane includes hydrofluoroxiranes and perfluoroxiranes
  • fluoramine includes hydrofluoroamines and perfluoroamines
  • fluoroketone includes hydrofluoroketones and perfluoroketones
  • the term includes fluoroketones and perfluoroketones
  • fluoroketone includes fluoroketones and perfluorolefins
  • fluoronitrile includes hydrofluoronitriles and perfluoronitriles.
  • the dielectric insulation medium is selected from the group consisting of: one (or more) hydrofluoroethers, one (or more) perfluoroketone (s), one (or more) hydrofluoroolefin (s), one (or more) perfluoronitriles, and mixtures thereof Substances.
  • fluoroketone is to be interpreted broadly in connection with the present invention and is intended to include both fluoromonoketones and fluorodiketones or, in general, fluoropolyketones. In this case, more than a single carbonyl group can be present in the molecule, laterally limited by carbon atoms.
  • the term is also intended to include saturated and unsaturated components with double and / or triple bonds between carbon atoms.
  • the at least partially fluorinated alkyl chain of the fluoroketones can be linear or branched and can optionally also form a ring.
  • the dielectric insulation medium and arc extinguishing agent comprises, as at least one component, a fluoromonoketone, which can optionally also contain foreign atoms in the main carbon chain of the molecule, namely e.g. at least one foreign atom from the group consisting of: nitrogen atom, oxygen atom, sulfur atom, which replaces a corresponding number of carbon atom (s).
  • the fluoromonoketone in particular perfluoroketone, advantageously has from 3 to 15 or from 4 to 12 and in particular from 5 to 9 carbon atoms.
  • the fluoromonoketone preferably has exactly 5 and / or exactly 6 and / or exactly 7 and / or exactly 8 carbon atoms.
  • the dielectric insulation medium and arc extinguishing agent comprises as at least one component a hydrofluoroether selected from the group consisting of: hydrofluoromonoether comprising at least 3 carbon atoms; Hydro fluoromonoethers comprising exactly 3 or exactly 4 carbon atoms; Hydrofluoromonoether having a ratio of the number of fluorine atoms to the total number of fluorine and hydrogen atoms of at least 5: 8, hydrofluoromonoether having a ratio of the number of fluorine atoms to the number of carbon atoms in the range from 1.5: 1 to 2: 1; Pentafluoroethyl methyl ether; 2,2,2-trifluoroethyl trifluoromethyl ether; and mixtures of these substances.
  • hydrofluoroether selected from the group consisting of: hydrofluoromonoether comprising at least 3 carbon atoms; Hydro fluoromonoethers comprising exactly 3 or exactly 4 carbon atoms; Hydrofluoromonoether having
  • the dielectric insulation medium comprises, as at least one component, a fluoroolefin selected from the group consisting of: hydrofluoroolefins (HFO) with at least 3 carbon atoms, hydrofluoroolefins (HFO) with exactly 3 carbon atoms, 1,1,1,2-tetrafluoropropene (HFO-1234yf ), 1,2,3,3-tetrafluoro-2-propene (HFO-1234yc), 1,1,3,3-tetrafluoro-2-propene (HFO-1234zc), 1,1,1,3-tetrafluoro- 2-propene (HFO-1234ze), 1,1,2,3-tetrafluoro-2-propene (HFO-1234ye), 1,1,1,2,3-pentafluoropropene (HFO-1225ye), 1,1,2 , 3,3-pentafluoropropene (HFO-1225yc), 1,1,1,3,3-pentafluoropropene (
  • the dielectric insulation medium comprises a fluoronitrile, in particular a perfluoronitrile, as at least one component or organofluorine compound.
  • the fluoronitrile or perfluoronitrile comprises - at least or precisely - 2 or 3 or 4 carbon atoms.
  • the fluoronitrile is preferably a perfluoroalkyl nitrile, in particular a perfluoroacetonitrile, perfluoropropionitrile (C2F5CN) and / or a perfluorobutyronitrile (C3F7CN).
  • the fluoronitrile is particularly preferably a perfluoroisobutyronitrile (with the formula (CF3) 2CFCN) and / or a perfluoro-2-methoxypropanenitrile (with the formula CF3CF (OCF3) CN); Of these, perfluoroisobutyronitrile is particularly advantageous because of its low toxicity.
  • the dielectric insulation medium can also additionally have a background gas or carrier gas which is different from the organofluorine compound and which in particular is not a fluorine ether, no oxirane, no fluoramine, no fluoroketone, no fluoroolefin or fluoronitrile.
  • the carrier gas can be selected from the group consisting of: air, air component, N 2 , O 2 , CO 2 , a noble gas, H2; Nitrogen oxides and in particular NO 2 , NO, N 2 O; Fluorocarbons and in particular perfluorocarbons, such as CF 4 , CF 3 I, SF 6 ; and mixtures of these substances.
  • the first commutation contact element 112 and / or the second commutation contact element 122 can be essentially symmetrical, in particular cylindrically symmetrical, around the Be axis A.
  • the first commutation contact element 112 and the second commutation contact element 122 can be designed such that they can form a form-fitting connection with one another.
  • the first commutation contact element 112 can be designed as a contact tulip and the second commutation contact element 122 can be designed as a contact pin, so that the first commutation contact element 112 partially encloses the second commutation contact element 122 in the closed switch state.
  • the second commutation contact element 122 can be designed as a contact tulip and the first commutation contact element 112 can be designed as a contact pin, so that the second commutation contact element 122 partially encloses the first commutation contact element 112 in the closed switch state.
  • a stable electrical connection can be formed between the first commutation contact element 112 and the second commutation contact element 122.
  • the second commutation contact element 122 can have a taper into which a widening of the first commutation contact element 112 can engage in the closed switch state in order to form the snap connection.
  • the first commutation contact element 112 can have a taper into which a widening of the second commutation contact element 122 can engage in the closed switch state in order to form the snap connection.
  • this commutation contact element 112, 122 can have the widening
  • the commutation contact element 112, 122 which is designed as a contact pin, can have the taper. In the closed commutation contact element position, the taper and the widening can be in engagement with one another, whereas the engagement of the widening in the taper can be released in the open commutation contact element position.
  • the first contact 114 and / or the second contact 124 can, viewed from the axis A, be arranged only on one side of the first contact arrangement 110 or the second contact arrangement 120.
  • the first contact 114 and / or the second contact 124 can be formed in the circumferential direction around the axis A.
  • the first contact 114 and / or the second contact 124 can have a cutout for a linear gear (see below).
  • the first contact 114 and / or the second contact 124 can serve to reduce or prevent the formation of an arc or its effects on the neighboring parts, such as the first contact group 110, the second contact group 120 and / or the housing 105 .
  • the first commutation contact element 112, the second commutation contact element 122, the first contact 114 and / or the second contact 124 can comprise an arc-proof material.
  • the first contact 114 can protrude from the first commutation contact element 112 in the direction of the second contact arrangement 120 and the second contact 124 can protrude from the second commutation contact element 122 in the direction of the first contact arrangement 110 when the first contact 114 is in the closed contact position is moved.
  • a distance between the first contact 114 and the second contact 124 is smaller than a distance between the first commutation contact element 112 and the second commutation contact element 122 in the direction of the axis (A).
  • a distance between the first contact 114 and the second contact 124 can be smaller than a distance between the first commutation contact element 112 and the second commutation contact element 122.
  • an arc is more preferably formed between the first contact 114 and the second contact 124 than between the first commutation contact element 112 and the second commutation contact element 122.
  • the first stop 118 can be moved together with the first commutation contact element 112 counter to and / or with the direction of the force of the elastic element 116.
  • the first stop 118 can be moved together with the first commutation contact element 112 against the direction of the force of the elastic element 116.
  • the elastic element 116 can be tensioned. After the snap connection has been released, the elastic element 116 can relax and the first stop 118 can be moved together with the first commutation contact element 112 in the direction of the force of the elastic element 116.
  • the first movement sequence corresponds to the movement of the first contact 114 from the closed contact position to the open contact position. This movement takes place essentially uniformly along a contact path, which corresponds to a path, which the second contact 114 travels from the closed contact position to the open contact position, in particular to an end position of the contact position.
  • the movement of the first contact 114 along the contact path can take place at a first speed v1.
  • the first speed v1 can be essentially constant over the entire contact distance.
  • the second stop 119 can also cover the contact distance at the first speed v1.
  • the second movement sequence corresponds to the movement of the first commutation contact element 112 from the closed commutation contact element position to the open commutation contact element position.
  • the snap connection remains in the closed state and the first commutation contact element 112 does not move away from the second commutation contact element 122.
  • a relative movement between the first commutation contact element 112 and the second contact 114 thus takes place over the first part of the contact path.
  • first stop 118 which is arranged to be moved together with the first commutation contact element 112
  • second stop 119 which is arranged to be moved together with the first contact 114 to be moved.
  • the first stop 118 and the second stop 119 therefore move towards one another. Since the elastic element 116 is mounted between the first stop 118 and the second stop 119, the elastic element 116 is tensioned by the movement of the first stop 118 and the second stop 119 towards one another.
  • the elastic element 116 thus relaxes when the first part of the contact path is exceeded or when the snap connection is released and pulls the first commutation contact element 112 at a pulling speed Vz in the direction of the open Commutation contact element position.
  • the second commutation contact element 112 covers a distance which is predetermined by the first stop 118 and the second stop 119, in particular by a distance between the first stop 118 and the second stop 119.
  • the pulling speed Vz adds to the first speed v1 with which the first commutation contact element 112 is connected via the positive connection of the first stop 118 and the second stop 119 is moved.
  • the first commutation contact element 112 is thus separated from the second commutation contact element 122 at a second speed v2, which is greater than the first speed v1.
  • the drawing speed Vz is preferably greater than the first speed.
  • the speed at which the first commutation contact element 112 is moved away from the second commutation contact element 122 can be increased. This can also reduce the occurrence of an electric arc and the damage it causes. In particular, the first commutation contact element 112 can be pulled further away from the second contact group 120 than the first contact 114.
  • a drive (not shown) can be provided for moving the first contact 114.
  • the drive can drive the first contact 114 in order to move the first contact 114, in particular along the axis A, from the first contact position to the second contact position and from the second contact position to the first contact position.
  • the drive can be positively connected to the first contact 114 via a gear, in particular a linear gear, in order to move the first contact 114 along the axis A.
  • the drive can specify the first speed v1.
  • the Figure 2 shows schematically a partial view of the switch 100 moving from the separated commutation contact element position to the closed commutation contact element position, in particular shortly before the first commutation contact element 112 contacts the second commutation contact element 122.
  • the first contact 114 makes contact with the second contact 124 before the first commutation contact element 112 makes contact with the second commutation contact element 122.
  • This can an arc can be specifically formed between the first contact 114 and the second contact 124, whereby in particular damage to the first commutation contact element 112 and the second commutation contact element 122 can be prevented.
  • the first commutation contact element 112 When moving from the open commutation contact element position to the closed commutation contact element position, the first commutation contact element 112, the first contact 114, the first stop 118 and the second stop 119 can be moved together in the direction of the second contact arrangement 120.
  • the elastic element 116 cannot be tensioned by the movement from the open commutation contact element position to the closed commutation contact element position.
  • the snap connection described herein between the first commutation contact element 112 and the second commutation contact element 122 is formed in the closed commutation contact element position.
  • the snap connection not only provides a mechanically stable connection between the first commutation contact element 112 and the second commutation contact element 122, but, in combination with the mounting of the first commutation contact element 112 in the first contact arrangement 110 via the elastic element 116, offers the advantage that the speed when disconnecting of the first contact arrangement 112 can be increased from the second contact arrangement 122.
  • the Figure 3 shows schematically a partial view of the switch 100 moving from the closed commutation contact element position to the disconnected commutation contact element position, in particular in a state shortly before the snap connection is released.
  • the first commutation contact element 112 and the are in this state second commutation contact element 122 is still in the closed commutation contact element position; the first commutation contact element 112 has therefore not yet been separated from the second commutation contact element 122.
  • the first commutation contact element 112 and the second commutation contact element 122 are shown quasi-transparently, which is why both contours are visible in the contact area.
  • the first contact 114 can already be separated from the second contact 124.
  • the contact part 115 can already be in the open contact part position, that is to say already separated from the second diverting contact 127.
  • the first commutation contact element 112 can in this state protrude from the first contact 114 in the direction of the second contact arrangement 120.
  • the first contact 114 can therefore already have covered part of the distance in the direction of the open contact position.
  • the state shown has not yet reached the stop position at which the snap connection is released.
  • the first stop 118 is still at a distance from the second stop 119 and the form fit of the first stop 118 and the second stop 119 has not yet taken place.
  • the state shown thus represents a state in which the first movement sequence takes place as described herein and the second movement sequence is in a state in which the first part of the contact path has not yet been exceeded and thus the first contact 114 and the second stop is moved relative to the first commutation contact element 112 and the first stop 118.
  • the elastic element 116 is (still) tensioned.
  • Exemplary embodiments also include gas-insulated switchgear assemblies that include one or more switches according to the described exemplary embodiments.
  • the invention has been exemplified using a switch, in particular using a protective gas switch, explained. However, it is also suitable for other switches for high and medium voltage applications, in particular of substations, e.g. for vacuum disconnectors, self-blowing power disconnectors, etc.
  • the invention is also suitable for alternative gas switches, that is to say for switches that are described in particular with a Alternative gas to SF 6 gas are filled.
  • the invention is also suitable for switches that are filled with oil or air or another insulating medium.
  • the present invention thus provides a method for disconnecting a switch 100.
  • the switch 100 comprises a housing 105, a first contact arrangement 110 which has a first commutation contact element 112 and a first contact 114, and a second contact arrangement 120 which has a second commutation contact element 122 and a second contact 124, the first contact 114 being opposite the first commutation contact element 112 protrudes in the direction of the second contact arrangement 120 and the second contact 124 protrudes with respect to the second commutation contact element 122 in the direction of the first contact arrangement 110.
  • the switch 100 is disconnected from a closed commutation contact element position, in which the first commutation contact element 112 contacts the second commutation contact element 122, to an open commutation contact element position, in which the first commutation contact element 112 is separated from the second commutation contact element 122.
  • the method comprises moving, at a first speed v1, the first contact 114 when there is a snap connection between the first commutation contact element 112 and the second commutation contact element 122 along an axis A from a closed contact position in which the first contact 114 has the second contact 124 contacted, to an open contact position in which the first contact 114 is separated from the second contact 124.
  • the elastic element 116 preloads the first commutation contact element 112 in the direction of the open commutation contact element position. If the first contact 114 exceeds a defined stop position during the movement in the direction of the open contact position, the snap connection is released and the first commutation contact element 112 is moved in the direction of the open commutation contact element position at a second speed v2, the second speed v2 is greater than the first speed v1.
  • a cycle of a closing movement and an opening movement can in particular consist of three contacting stages.
  • the first contact 114 can first contact the second contact 124, as a result of which a commutation current can flow between the first contact 114 and the second contact 124.
  • the contact part 115 can then contact the second diverting contact 127, as a result of which the switch 100 can be closed.
  • the nominal current can flow through the contact part 115 upon contact with the second diverter contact 127.
  • the contact part 115 can first be separated from the diverter contact 127.
  • the first contact 114 can then be separated from the second contact 124.
  • the first contact element 112 can then be separated from the second contact element 122 via the snap connection, as a result of which a commutation current can flow between the first contact element 112 and the second contact element 122.
  • a commutation current can flow between the first contact element 112 and the second contact element 122.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
EP17755157.9A 2016-08-26 2017-08-17 Schalter und verfahren zum trennen eines schalters Active EP3504726B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016115912 2016-08-26
PCT/EP2017/070855 WO2018036904A1 (de) 2016-08-26 2017-08-17 Schalter und verfahren zum trennen eines schalters

Publications (2)

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EP3504726A1 EP3504726A1 (de) 2019-07-03
EP3504726B1 true EP3504726B1 (de) 2020-12-02

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EP17755157.9A Active EP3504726B1 (de) 2016-08-26 2017-08-17 Schalter und verfahren zum trennen eines schalters

Country Status (6)

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US (1) US10720291B2 (ko)
EP (1) EP3504726B1 (ko)
KR (1) KR102491405B1 (ko)
CN (1) CN109643619B (ko)
HU (1) HUE052765T2 (ko)
WO (1) WO2018036904A1 (ko)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4227971A1 (en) * 2022-02-09 2023-08-16 Hitachi Energy Switzerland AG High voltage disconnector switch

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CH653474A5 (de) 1980-05-14 1985-12-31 Bbc Brown Boveri & Cie Nachlaufkontakteinrichtung eines elektrischen schalters.
DE3070004D1 (en) * 1980-06-23 1985-03-07 Bbc Brown Boveri & Cie High voltage power circuit breaker
EP0046824B1 (de) * 1980-09-01 1984-07-11 Sprecher + Schuh AG Druckgasschalter
DE3122442A1 (de) * 1981-06-02 1982-12-23 Siemens AG, 1000 Berlin und 8000 München Trennschalter fuer hochspannungsanlagen
YU173582A (en) * 1981-09-16 1985-03-20 Bbc Brown Boveri & Cie Electrical switch
DE3331819A1 (de) * 1983-09-01 1985-03-21 Siemens AG, 1000 Berlin und 8000 München Trennschalter fuer metallgekapselte, druckgasisolierte hochspannungsschaltanlagen
DE3938711A1 (de) * 1989-11-17 1991-05-23 Siemens Ag Trennschalter fuer metallgekapselte, druckgasisolierte hochspannungsschaltanlagen
FR2748598B1 (fr) * 1996-05-13 1998-06-05 Gec Alsthom T & D Sa Disjoncteur a haute tension a auto-soufflage
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DE102010062343A1 (de) * 2010-12-02 2012-06-06 Siemens Aktiengesellschaft Elektrokontaktanordnung
TWM420835U (en) * 2011-08-18 2012-01-11 Sung Jung Minute Industry Co Ltd Rectifier chip terminal
DE102012203042B4 (de) * 2012-02-28 2024-01-25 Siemens Aktiengesellschaft Schaltvorrichtung und Elektrisches Schaltgerät
EP2728602B1 (de) * 2012-11-05 2015-01-21 ABB Technology AG Elektrischer Hochspannungs-Lasttrenner und Verfahren zum Öffnen desselben
FR3016470B1 (fr) * 2014-01-14 2016-02-26 Alstom Technology Ltd Sectionneur a detection de defaillance d'un ressort d'acceleration d'un contact d'arc
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Publication number Publication date
CN109643619A (zh) 2019-04-16
US20190198272A1 (en) 2019-06-27
CN109643619B (zh) 2020-12-25
WO2018036904A1 (de) 2018-03-01
HUE052765T2 (hu) 2021-05-28
EP3504726A1 (de) 2019-07-03
KR20190039308A (ko) 2019-04-10
KR102491405B1 (ko) 2023-01-20
US10720291B2 (en) 2020-07-21

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