WO2021105190A1 - Appareil de verrouillage secondaire - Google Patents

Appareil de verrouillage secondaire Download PDF

Info

Publication number
WO2021105190A1
WO2021105190A1 PCT/EP2020/083328 EP2020083328W WO2021105190A1 WO 2021105190 A1 WO2021105190 A1 WO 2021105190A1 EP 2020083328 W EP2020083328 W EP 2020083328W WO 2021105190 A1 WO2021105190 A1 WO 2021105190A1
Authority
WO
WIPO (PCT)
Prior art keywords
connector
plug
secondary locking
snap connection
locking device
Prior art date
Application number
PCT/EP2020/083328
Other languages
German (de)
English (en)
Inventor
Alfred Annecke
Original Assignee
Amphenol-Tuchel Electronics Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Amphenol-Tuchel Electronics Gmbh filed Critical Amphenol-Tuchel Electronics Gmbh
Priority to EP20812308.3A priority Critical patent/EP4066325A1/fr
Publication of WO2021105190A1 publication Critical patent/WO2021105190A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/44—Means for preventing access to live contacts
    • H01R13/447—Shutter or cover plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/502—Bases; Cases composed of different pieces
    • H01R13/506—Bases; Cases composed of different pieces assembled by snap action of the parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5202—Sealing means between parts of housing or between housing part and a wall, e.g. sealing rings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/639—Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/64—Means for preventing incorrect coupling
    • H01R13/641—Means for preventing incorrect coupling by indicating incorrect coupling; by indicating correct or full engagement

Definitions

  • Secondary locking device The invention relates to a secondary locking device for a connector plug for locking a plug connection in its primary contacting position, having at least one secondary locking element with at least one locking pin for insertion into a connector housing.
  • the invention also relates to a connector housing part and a connector.
  • Plug-in connections, contact-making elements, pole connectors, plug-in sleeves, etc. in a wide variety of designs and variants are used to make contact or to produce detachable electrically conductive connections.
  • contact systems In particular, but not exclusively for electrical contacting tasks in the higher power range, contact systems have been developed that are based on prismatic geometries for receiving one or more contact pins.
  • High-voltage plug-in connectors are often implemented with one or more plug-in contact pins and, in addition to reliable, detachable and permanent contact, must in particular also be secured against unintentional separation of the plug-in connection caused by axial tensile loads.
  • bayonet or screw locks are often used as primary locks in the prior art. These securing means are usually firmly attached to the respective plug connections and are supplemented by secondary locks to protect against unintentional disconnection. In the prior art, securing means are usually used as spring-like arrangements which engage with corresponding openings or catches and thereby cause two parts of a circular connector to be locked.
  • circular connectors are known in which the plug connection is established via so-called bayonet locks.
  • An alternative form of a lock is a twist lock, which, like a bayonet lock, is attached to the plug connections in such a way that the connector pair is fixed to a locking thread by means of a locking screw. If prismatic, cube-shaped, square or other connector geometries are selected, integrated or separate primary locks can be used, which can be supplemented by secondary locking devices.
  • Locks are problematic in particular when the aim is to prevent the lock from being released unintentionally or improperly and / or the plug connector, which is under voltage, from being pulled. In the latter case, arcs can ignite, especially in the high-voltage range, which are problematic in terms of safety and can endanger life.
  • a known connector solution with primary and secondary locking is presented in DE 10 2013 112 103 A1.
  • a plug of this plug connection comprises an inner subassembly, an outer sleeve which is mounted displaceably with respect to the inner subassembly and at least partially encloses the inner subassembly and first locking means for locking the plug with an associated plug connector part when the plug is plugged onto the plug connector part, the locking being effected by a Displacement of the outer sleeve with respect to the inner assembly can be solved.
  • Such connectors consisting of a plug and a connector part
  • push-pull connectors are known as push-pull connectors. This name is derived from the function of such connectors. These can be closed by simply plugging the connector onto the connector part in one direction of insertion (“push”).
  • the connector part can be a socket or a second plug.
  • plugging on or by plugging on locking means of the plug and the plug connector part are locked together so that the plug connector cannot be released by pulling, for example, a cable connected to the plug.
  • the outer sleeve of the plug is pulled against the direction of insertion (“pull”). A relative movement takes place between the outer sleeve and the inner assembly of the plug, as a result of which the locking means are unlocked.
  • a further disadvantage of the known plug-in connectors of this push-pull type is that any person who has access to the plug-in connector can release such a plug-in connector without any further aids. Accidental, arbitrary or unauthorized loosening cannot be prevented with the known connectors of the convenient push-pull type.
  • DE 102013 112 103 A1 proposes that an additional locking element is provided, which is mounted displaceably and in at least one stable locking position in which the displacement of the outer sleeve with respect to the inner assembly is blocked, and at least one stable release position, in which is released for the displacement of the outer sleeve with respect to the inner assembly can be brought.
  • DE 102016208673 AI presents a connector with a bolt for secondary locking of contact partners.
  • the aim here is that the contact partner is properly fixed in its contact chamber when the connector is plugged into a cooperating mating connector and the contact partner of the connector is brought together with the mating contact partner of the mating connector.
  • the locking element is designed as a bolt that can be displaced relative to the contact carrier and thus as a separate component to the contact carrier, the bolt one after the other in the direction of movement according to the number of contact partners Has contact securing element for the secondary lock and between a
  • Vorverrast- and an Endverrast ein is designed to be movable on the contact carrier.
  • the separate design of the locking element namely the displaceable bolt, has the advantage that both the bolt and the contact carrier on which it is attached can be manufactured separately from one another, so that the manufacture of these two components is simplified, especially when they be manufactured in a plastic injection molding process. Despite the simplified production, both components can be optimally coordinated with one another in terms of their geometry and the resulting functionality.
  • the displacement of the bolt in relation to the contact carrier has the advantage that a simple movement ensures that the bolt with its corresponding contact securing elements secondarily locks the contact partners in their respective inserted contact chambers. This can be done either by inserting a respective contact partner into its associated contact chamber and thereby primarily locking it and then bringing the bolt into operative connection with the contact carrier and then shifting it in order to thereby effect the secondary locking.
  • the bolt is already mounted on the contact carrier in a certain position, namely a pre-locking position, in which case it is possible in this pre-locking position of the bolt to insert a contact partner into the contact chamber and primarily lock it there . After this has taken place, the bolt can be moved from its Vorverraststeiiung into its further position, in particular a final locking position, in order to effect the secondary locking of the contact partners in their contact chambers.
  • DE 102017204 166 A1 shows a plug connection with a one-piece or integrated secondary lock.
  • CPA Connector Position Assurance
  • a secondary locking device designed as a separate component with positive locking is presented in DE 102017 119269 B3.
  • a secondary lock is provided in the form of a housing position safety device, the locking kinematics of which is primarily rotary.
  • a contact housing with a plurality of electrical contact devices with a primary housing position securing device for securing a plug-in position of the contact housing on / in a contact housing receptacle, and a secondary housing position securing device for securing a securing position of the primary housing position securing device, the secondary housing position securing device being connected in one piece or integrally with a region of the contact housing
  • the secondary housing position safety device can be moved from its unlocked position on / in the contact housing, into its safety position on / in the contact housing, in which it secures the safety position of the primary housing position safety device, the secondary housing position safety device being rotated from its unlocked position into its safety position can be swiveled.
  • a secondary lock designed as a separate component, designed as a CPA element, is presented in DE 202017 105774 U1.
  • the CPA element has spring clips and is preferably designed in one piece, in particular monolithically, or the spring clips on the CPA element are, for example, glued.
  • This secondary locking element is based on the latching hook principle with preferably a rear grip.
  • the CPA element can be positioned in a pre-locking position and an end locking position on the plug element. In the present case, the pre-latching position is understood to mean a position of the CPA element on the plug element before the plug element is inserted into the mating plug element.
  • the end latching position is understood to mean a position of the CPA element on the plug element after the plug element has been inserted into the mating plug element.
  • the CPA element can only be transferred from the pre-latched position to the final latched position when the mating connector element is engaged, which ensures that the plug element and the mating connector element are completely plugged together and thus latched.
  • the main locking element can be moved in a first locking direction for locking with the plug element.
  • the latching direction is generally understood to mean a direction of movement of a latching element, for example a latching hook, in order to form a latching connection, in particular a rear grip.
  • the first locking direction is understood to mean a direction which is preferably oriented orthogonally to the plug-in direction. In the pre-latching position, the CPA element is secured against displacement in the plugging direction by means of the at least one pre-latching element, as long as the mating connector element is not plugged on.
  • DE 102017 125 193 A1 provides a connector and a method for testing a connector for a plug connection, having a contact carrier with at least one contact chamber receiving a contact partner, the contact partner being inserted in its contact chamber in a primarily locked manner, with a locking tab with its fastening end is pivotably arranged on the contact carrier and forms a secondary lock for the at least one contact partner when this is inserted in its contact chamber in a primarily locked manner.
  • a locking tab is provided which, at its end facing away from the fastening end, has a cross bar that forms the secondary lock together with the contact carrier, a test plug being provided which can be brought into operative connection with the connector and possibly with the locking tab. If the contact carrier of the connector is brought into operative connection with the test plug, for example by an insertion process, the test plug can be used to test whether the locking tab is in its final latching position.
  • Known secondary locking devices for coaxial or angled connectors can be implemented as non-releasable or releasable connector position locking, CPA locking by one or more individual latching hooks between the CPA and the connector housing. These are usually offset from the center of the connector and act in the direction of plugging in the CPA. These only snap into place when the central pressure is applied to the CPA.
  • the secondary locking device may be tilted with the result that the locking in the secondary locking position is not, not fully or only partially.
  • the solution provided in known connectors for avoiding intermediate positions in the movement path of the secondary locking device is implemented by an energy storage device, for example in the form of additionally coordinated ribs that dip through an opening in excess.
  • an energy storage device for example in the form of additionally coordinated ribs that dip through an opening in excess.
  • a defined resistance, force increase over the locking movement path of the secondary locking device is generated, so that a snap-in movement is generated as a result of the elastic restoring forces in the direction of movement of the locking position when overcoming the rib constriction.
  • the reliability of reaching the secondary locking position is supported and the risk of slow creeping in or an intermediate locking position is reduced.
  • It is the object of the invention to further develop a secondary locking device for a primary locking so that the aforementioned disadvantages of the prior art are at least partially reduced and the reliability of the secondary locking is improved.
  • the reliability-reducing intermediate position of the secondary locking device, CPA element is counteracted by the design according to the invention.
  • the teaching according to the invention provides a secondary locking device for the primary locking of a plug connection in a push-button-like, mushroom-shaped shape, which has a snap or ring snap connection that extends around at least some regions.
  • the snap connection in the printhead-like secondary locking device is designed in such a way that two end position positions in the form of two unambiguous switching positions, not locked or locked, can be assumed.
  • the snap geometry with an essentially non-positive connection has self-guiding properties and / or self-centering properties in that the snap elements at least partially circumferentially and with their contact surfaces with each other form a partially curved or radius-shaped rear grip, which allows force-dependent shifts relative to each other.
  • the invention optionally provides that an additive, additional guide element further increases the centering and / or guiding function.
  • the basic construction which is similar to a push button, is, however, considerably precise in guiding and centering even without additional guiding or centering elements.
  • the secondary locking device designed as a CPA element with a push-button-like shape, can preferably be based on a plastic material and, due to the elastic material properties, supports a long service life and operating load cycles in that plastic materials have high deformability.
  • the geometries of the snap elements both with respect to one another and with regard to the non-positive connection support the function of the energy store through the elastic restoring forces as a result of the expansion of the outer element by at least one bead area of the inner snap element.
  • the same applies to the actuation haptics which give a user unambiguous feedback on reaching the locking position through its defined, very clearly perceptible latching behavior.
  • the haptic feedback effect can be reinforced by optionally provided sealing elements, since the additional friction of the sealing lips is concealed and an undesired stopping or reduction of the snap movement into the locking position (so-called “slider creeping in”) is reduced.
  • the invention also supports, in a particularly advantageous manner, the control of the correct secondary locking position, also in that the correct end position in the locking position can be visually very easily recognized.
  • the push-button-like head of the secondary locking device rests against the associated connector housing. This situation, which is visible from the outside, can easily be detected optically by a user or an image processing system.
  • the correct latching position of the secondary locking device can thus be checked both by means of haptic feedback and optically.
  • FIG. 1 shows a perspective exploded view of a connector plug with the secondary locking device according to the invention
  • FIG. 2a shows the side view of a connector plug with the secondary locking device according to the invention in the locking position
  • FIG. 2b shows the sectional illustration AA of the plug connector with the secondary locking device according to the invention in the locking position according to the section line of FIG. 2a; ok
  • FIG. 2c shows the sectional view A-A of the connector plug in three-dimensional illustration with the secondary locking device according to the invention in the locking position according to the section line of FIG. 2a;
  • 3a shows the side view of a connector plug with the secondary locking device according to the invention in the lock-open position
  • FIG. 3b shows the sectional view B-B of the connector plug with the secondary locking device according to the invention in the lock-open position according to the section line of FIG. 3a;
  • FIG. 3c shows the sectional view B-B of the connector plug in three-dimensional illustration with the secondary locking device according to the invention in the lock-open position according to the section line of FIG. 3a;
  • FIG. 4 shows the longitudinal section of the connector plug with the secondary locking device according to the invention in a perspective illustration
  • FIG. 5 shows the sectional view A-A of the plug connector with the secondary locking device according to the invention in the locking position according to the section line of FIG. 2a in an enlarged detailed view
  • FIG. 1 shows a perspective exploded view of a connector plug 100 equipped with the secondary locking device 1 according to the invention.
  • the connector plug 100 of this exemplary embodiment is designed as an angled connector plug and is built up by two connector housing parts 110, 120, which accommodate line contacts 101 and mostly other connector elements on the inside or outside.
  • the primary component of the secondary locking device 1 is the secondary locking element, CPA element 10, the structure and design of which is mushroom-shaped or push-button-shaped.
  • the secondary locking device 1 interacts with at least one connector housing part 110, 120 and can be coupled and preferably temporarily fixed to the connector plug 100 via snap connections 11, 111.
  • At least one locking pin 16 is provided for realizing the secondary locking function.
  • At least one centering pin 15 and / or at least one coding pin 17 can optionally be provided.
  • the kinematics of movement of the secondary locking element, CPA element 10 of the secondary locking device 1 can, as selected here, obey a linear movement path axially parallel to the plug-in direction of the plug contacts 102.
  • Other kinematics of movement for secondary locking that deviate from the linear movement path and / or the axis-parallel alignment of this path are likewise encompassed and supported by the invention.
  • FIG. 2a shows the side view of a connector plug 100 with the secondary locking device 1 according to the invention in the locking position.
  • FIG. 2b depicts the sectional view A-A of the plug connector 100 with the secondary locking device 1 according to the invention in the locking position according to the section line A-A of FIG. 2a. Due to the position of the secondary locking element, CPA element 10 in the end position along the locking kinematics and resting against at least one mechanical stop 18, 118, the secondary locking position is assumed.
  • FIG. 2c includes the sectional view A-A of the connector plug 100 according to the sectional line of FIG. 2a in a three-dimensional illustration with the inventive
  • FIG. 3a shows the side view of a connector plug 100 with the secondary locking device 1 according to the invention in the unlocked position, ie. in the position in which the secondary lock is unlocked.
  • At least one grip lug 19 can be provided on the pushbutton-shaped end of the secondary locking element 10 in order to improve the feel, in particular when actuating from the locking to the unlocking position.
  • FIG. 3b depicts the sectional view B-B of the connector plug 100 with the secondary locking device 1 according to the invention in the unlocking position according to the section line B-B of FIG. 3a. Due to the position of the secondary locking element, CPA element 10 in the open position along the locking kinematics, the secondary locking position is not assumed.
  • FIG. 3c comprises the sectional view B-B of the connector plug 100 according to the section line of FIG. 3a in a three-dimensional illustration with the secondary locking device 1 according to the invention in the unlocked position.
  • FIG. 4 shows the longitudinal section of the connector plug 100 with the secondary locking device 1 according to the invention in a perspective illustration.
  • the snap connection 2 with its snap connection elements 11, 111, couples the CPA element 10 to a connector housing part 110.
  • the mushroom-shaped or pushbutton-shaped top of the CPA element 10 with its CPA snap connection 11 encompasses the snap connection 111 of the connector housing part 110 on the outside in a practically overlapping manner .
  • the optional seal 20 shown here lies in the radial direction on the inside of the snap connection 2.
  • Figure 5 includes the sectional view A-A of the invention
  • Secondary locking device 1 with its snap connection 2 in the locking position according to the section line AA of Figure 2a in an enlarged detailed view.
  • the snap connection 2 is essentially formed by the
  • each snap connection element 11, 111 at least one snap connection bead 12, 112 is provided which each bead-shaped or bulb-shaped with a concave or convex contour and are matched to one another in a corresponding manner, so that in the snap-in position the largely non-positive connection to produce the stable end stop and locking position with the corresponding snap connection element 111, 11 is supported.
  • the frictional locking of the connection results from the elastic restoring forces of the connection in the inclined contour areas 13, 113 of the snap connection, the inclined resultant being a radial and an axial force component, so that a kinematics of movement out of the locking position into the open position shown in Figure 5 shows this locking force must overcome.
  • an attacking, axially acting unlocking force is less than the locking force of the snap connection 2, the secondary locking device 1 is held in the locking end position.
  • Snap connection elements 11, 111 can be reinforced, increased in amount and / or the position of the resultant can be influenced by an optional seal 20, so that the locking force is increased.
  • the embodiment shown is implemented with a circumferential, here also concentric arrangement of the snap connection elements 11, 111.
  • Different designs for example eccentric arrangements in some areas and in particular snap connection combinations along a pitch circle, radian section and also multiple sections over the circumference are covered by the invention,
  • At least partially threading bevels 14, 114 can be provided on at least one snap connection element 11, 111.

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

L'invention concerne un appareil de verrouillage secondaire pour une fiche de connecteur mâle destiné à verrouiller un connecteur mâle dans sa position de contact primaire, ayant au moins un élément de verrouillage secondaire avec au moins une broche de verrouillage destinée à être insérée dans un boîtier de connecteur mâle, l'élément de verrouillage secondaire présentant une zone en forme de bouton-poussoir avec au moins une connexion par encliquetage d'élément, l'au moins une connexion par encliquetage d'élément étant formée de manière à correspondre à une connexion par encliquetage de boîtier, de telle sorte que l'élément de verrouillage secondaire peut être fixé dans la position de verrouillage. L'invention concerne en outre une partie de boîtier de connecteur mâle pour un connecteur mâle présentant une connexion par encliquetage de boîtier pour la fixation d'un appareil de verrouillage secondaire. L'invention concerne également une fiche de connecteur mâle ayant un appareil de verrouillage secondaire.
PCT/EP2020/083328 2019-11-28 2020-11-25 Appareil de verrouillage secondaire WO2021105190A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20812308.3A EP4066325A1 (fr) 2019-11-28 2020-11-25 Appareil de verrouillage secondaire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019132391.6 2019-11-28
DE102019132391.6A DE102019132391B4 (de) 2019-11-28 2019-11-28 Sekundärverriegelungsvorrichtung

Publications (1)

Publication Number Publication Date
WO2021105190A1 true WO2021105190A1 (fr) 2021-06-03

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ID=73598118

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/083328 WO2021105190A1 (fr) 2019-11-28 2020-11-25 Appareil de verrouillage secondaire

Country Status (3)

Country Link
EP (1) EP4066325A1 (fr)
DE (1) DE102019132391B4 (fr)
WO (1) WO2021105190A1 (fr)

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CN114156850A (zh) * 2021-11-26 2022-03-08 贵州电网有限责任公司 一种配电网联络开关位置状态自识别的方法

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DE102022129741B3 (de) 2022-11-10 2024-04-11 Amphenol-Tuchel Electronics Gesellschaft mit beschränkter Haftung Winkeladapter für Airbag-Steckverbindungen

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Publication number Priority date Publication date Assignee Title
EP1115181A1 (fr) * 2000-01-07 2001-07-11 Sumitomo Wiring Systems, Ltd. Connecteur électrique
US20070037428A1 (en) * 2005-08-12 2007-02-15 Alfred Annecke Connector for pyrotechnic applications
DE102013112103A1 (de) 2013-11-04 2015-05-21 Phoenix Contact Gmbh & Co. Kg Push-Pull-Steckverbinder mit zusätzlichem Verriegelungselement
DE102016208673A1 (de) 2015-05-20 2016-11-24 Hirschmann Automotive Gmbh Steckverbinder mit Riegel zur Sekundärverriegelung von Kontaktpartnern
DE102017204166A1 (de) 2016-03-15 2017-09-21 Yazaki Corporation Steckverbindung
DE102017125193A1 (de) 2016-10-28 2018-05-03 Hirschmann Automotive Gmbh Prüfbarkeit der sekundären Verriegelungslasche in Endverraststellung
DE102017119269B3 (de) 2017-08-23 2018-12-13 Te Connectivity Germany Gmbh Kontaktgehäuse sowie elektrischer Verbinder
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114156850A (zh) * 2021-11-26 2022-03-08 贵州电网有限责任公司 一种配电网联络开关位置状态自识别的方法
CN114156850B (zh) * 2021-11-26 2023-09-26 贵州电网有限责任公司 一种配电网联络开关位置状态自识别的方法

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DE102019132391B4 (de) 2021-11-04
DE102019132391A1 (de) 2021-06-02
EP4066325A1 (fr) 2022-10-05

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