EP3540752B1 - Nh-fuse load break switch - Google Patents

Nh-fuse load break switch Download PDF

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Publication number
EP3540752B1
EP3540752B1 EP18162088.1A EP18162088A EP3540752B1 EP 3540752 B1 EP3540752 B1 EP 3540752B1 EP 18162088 A EP18162088 A EP 18162088A EP 3540752 B1 EP3540752 B1 EP 3540752B1
Authority
EP
European Patent Office
Prior art keywords
fuse
housing
circuit breaker
fuses
fuse circuit
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
EP18162088.1A
Other languages
German (de)
French (fr)
Other versions
EP3540752A1 (en
Inventor
Philipp Steinberger
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.)
Woehner GmbH and Co KG Elektrotechnische Systeme
Original Assignee
Woehner GmbH and Co KG Elektrotechnische Systeme
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 Woehner GmbH and Co KG Elektrotechnische Systeme filed Critical Woehner GmbH and Co KG Elektrotechnische Systeme
Priority to EP18162088.1A priority Critical patent/EP3540752B1/en
Priority to ES18162088T priority patent/ES2923297T3/en
Priority to PL18162088.1T priority patent/PL3540752T3/en
Priority to CN201910198934.3A priority patent/CN110277289B/en
Publication of EP3540752A1 publication Critical patent/EP3540752A1/en
Application granted granted Critical
Publication of EP3540752B1 publication Critical patent/EP3540752B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01H31/02—Details
    • H01H31/12—Adaptation for built-in fuse
    • H01H31/122—Fuses mounted on, or constituting the movable contact parts of, the switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/143—Electrical contacts; Fastening fusible members to such contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/22—Intermediate or auxiliary parts for carrying, holding, or retaining fuse, co-operating with base or fixed holder, and removable therefrom for renewing the fuse
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/47—Means for cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/52—Cooling of switch parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H01H2085/0555—Input terminal connected to a plurality of output terminals, e.g. multielectrode

Definitions

  • the invention relates to an NH fuse load-break switch for NH fuses with a high power density.
  • Load-break switches are used to disconnect a load or consumer or device from a current or voltage distribution system.
  • a power distribution system can include one or more power supply rails, in particular power busbars.
  • the consumers or loads are connected to the power distribution system via the load-break switch.
  • the load-break switch can contain usable fuses, in particular NH fuses. To disconnect the current phases from the loads or consumers, a user or an operator can manually actuate an actuating handle in order to open switch contacts within the load-break switch.
  • EP 2913835 A1 discloses a fuse load-break switch for low-voltage, high-performance fuses, with a fuse contact pair for receiving within a housing of the fuse load-break switch for each current phase to be separated a fuse is provided, with heat loss generated by the fuses being dissipated in at least one heat dissipation channel provided laterally on the housing of the fuse switch disconnector.
  • DE 9310753 U1 discloses a three-pole fuse element, completely encapsulated by a housing, for direct attachment to busbar systems, with a resilient latching lever for positively locking the fuse element to one of the busbars, with all terminals of the outgoing lines being at the same height in the area of the lower end face of the housing and that both in the area of the upper housing front side and in the lower housing front side several ventilation slots are arranged.
  • the invention therefore creates an NH fuse switch disconnector with the features of patent claim 1.
  • the NH fuse switch disconnector according to the invention offers the advantage that the volume of the housing of the NH fuse switch disconnector can be reduced and accordingly the space or installation space occupied by the NH fuse switch disconnector is reduced.
  • the NH fuse switch disconnector when the NH fuse switch disconnector is installed in a switch cabinet, for example, the NH fuse switch disconnector takes up relatively little space, so that more space is available for other devices in the switch cabinet.
  • the NH fuses can be switched simultaneously by means of a manually operable control unit attached to the housing.
  • the manually operable control unit is designed to be tool-safe in connection with the housing.
  • the housing comprises a contact carrier and a lower part.
  • the manually operable control unit is connected to a switching mechanism for the NH fuses.
  • the switching mechanism has a parallel pull-out for the NH fuses.
  • the switching mechanism has a pivoting pull-out for the NH fuses.
  • the housing of the NH fuse-switch disconnector has on its rear mounting locking elements for mounting the NH fuse-switch disconnector on horizontally arranged current-carrying rails and contact elements for making electrical contact with the current-carrying rails.
  • an associated NH fuse is provided in the housing of the NH fuse load-break switch for each current phase transported via an associated busbar.
  • the housing of the NH fuse switch disconnector has at one end for each current phase has a clamping device for connecting lines.
  • the third NH fuse located in the housing of the NH fuse switch-disconnector is in relation to the two NH fuses arranged next to one another below in the housing of the NH fuse switch-disconnector offset to the rear of the housing, with waste heat generated by the two adjacent NH fuses (NH1, NH2) also being able to be dissipated at the front of the housing by convection without the waste heat affecting the third NH fuse (NH3 ) warms up.
  • the housing of the LV HRC fuse switch disconnector has feed slots for supplying a cooling medium on a lower face of the housing and on an upper face and on a when the NH fuse switch disconnector is in the installed state Dissipation slots located on the longitudinal sides of the housing for dissipating the waste heat generated by the NH fuses.
  • the operating unit of the NH fuse switch disconnector is provided with an actuating handle which has two guide brackets which are connected to the switching mechanism of the NH fuse switch disconnector.
  • a fuse cover is provided on a front side or front side of the housing of the NH fuse switch disconnector, which covers the NH fuses.
  • the fuse cover has viewing windows on the front side of the housing.
  • the fuse cover of the NH fuse switch disconnector can be locked both when the NH fuse switch disconnector is switched on and when the NH fuse switch disconnector is switched off.
  • the housing of the NH fuse switch disconnector has a contact carrier which contains a thermally conductive plastic.
  • the NH fuse switch-disconnector or load-break switch 1 is intended for several NH fuses.
  • the load-break switch 1 has a housing 2.
  • the housing 2 is preferably formed in two parts and comprises a lower part 2A and a contact carrier 2B.
  • the contact carrier 2B includes a thermally conductive plastic.
  • the housing 2 of the load-break switch 1 is used to hold several NH fuses.
  • a thermally conductive contact carrier 2B is preferably provided, as is shown, for example, in 3 is shown.
  • the housing 2 contains the circuit breaker 1 three NH fuses NH1, NH2, NH3 for three different current phases L1, L2, L3.
  • the NH fuse switch disconnector 1 can be mounted on current-carrying rails, in particular busbars. When assembled, the housing 2 of the load-break switch 1 is aligned vertically. Waste heat generated by NH fuses located in the housing 2 is dissipated by convection inside the housing 2 laterally past the NH fuses arranged above and upwards out of the housing 2 to the environment.
  • the NH fuses located in the electrically insulating housing 2, for example the three in 1 NH fuses NH1, NH2, NH3 shown can be switched at the same time by means of a manually operated control unit 3 attached to the housing 2.
  • the manually operable operating unit 3 can be designed to be tool-safe together with the housing 2 .
  • the manually operable control unit 3 is connected to a switching mechanism for the NH fuses.
  • this switching mechanism has a parallel pull-out for switching the NH fuses.
  • the switching mechanism can also have a pivoting pull-out for the NH fuses with a pivot point, which is preferably arranged at the lower end of the housing 2 of the NH fuse switch disconnector 1 .
  • the switching mechanism provides a mechanism for moving the fuses in and out of fuse holders.
  • Each of the NH fuses can be provided for a specific phase L1, L2, L3 of the power supply network.
  • the housing 2 contains three NH fuses to protect three current phases L1, L2, L3.
  • the housing 2 contains a first NH fuse NH1 and a second NH fuse NH2 arranged side by side as in 1 recognizable.
  • a third NH fuse NH3 is arranged above these two adjacent NH fuses NH1, NH2.
  • Waste heat generated by the first NH fuse NH1 is conducted past a first side surface of the third top NH fuse NH3. Furthermore, the waste heat, which is generated by the second LV HRC fuse NH2 arranged next to it, is conducted laterally past an opposite side surface of the third LV HRC fuse NH3 lying on top, without warming up or heating up the third LV HRC fuse NH3 in the process.
  • the various NH fuses can be provided for different L phases.
  • the first NH fuse NH1 is provided for a first current phase L1
  • the second NH fuse NH2 for a third current phase L3
  • the third NH fuse NH3 for a second current phase L2.
  • the third NH fuse located in the housing 2 is NH3 in relation to the two in the installed state, the NH fuses NH1, NH2 arranged next to one another underneath are offset in the housing 2 toward the rear of the housing 2.
  • the NH fuse NH3 is thus to a certain extent lower, ie offset towards the rear, than the fuses NH1, NH2. This makes it possible for additional waste heat to be dissipated upwards through a fuse cover of the load-break switch 1 in the installed state.
  • the housing 2 of the NH fuse switch-disconnector 1 has mounting elements for mounting the switch-disconnector 1 on horizontally arranged current-carrying rails, in particular busbars, on its rear side.
  • These mounting elements include, for example, latching elements for mechanical connection with corresponding connection contours.
  • the mounting elements include, for example, four latching hooks that are suitable for mechanically fixing the device or housing to corresponding connection contours.
  • two of these latching hooks or latching elements 4-1, 4-2, which are provided on the back of the housing 2 can be seen.
  • figure 7 shows a rear view in which all four latching hooks 4-1, 4-2, 4-3, 4-4 can be seen.
  • contact elements are provided for making electrical contact with current-carrying rails, in particular busbars.
  • one or more plug-in contact elements are provided for each current phase L on the back of the housing 2 of the NH fuse switch disconnector 1, which can be inserted into corresponding contact slots of an associated busbar or a rail adapter for current-carrying rails.
  • two plug-in contact elements are available for each current phase L electrical contacting of current-carrying rails on the back of the housing 2 of the load-break switch 1 is provided.
  • figure 5 and 7 show an embodiment in which two plug-in contact elements for each phase L are provided on the back of the housing 2 of the load-break switch 1.
  • the two upper electrical plug contacts 5A, 5B are used to contact a first current-carrying rail
  • the electrical plug contact elements 6A, 6B in the middle are used to contact a second current-carrying rail
  • the electrical plug contact elements 7A, 7B at the bottom in the assembled state are used to contact a third live rail.
  • the current-carrying rails are preferably busbars. In a preferred embodiment, these busbars have corresponding contact slots. These contact slots are arranged in a predetermined grid transversely to the longitudinal direction of the current-carrying rail or busbar.
  • a current-carrying busbar accordingly has a multiplicity of evenly spaced contact slots which are designed to accommodate the corresponding plug-in contact elements.
  • the plug contact elements 5, 6, 7 consist of an electrically conductive material and, as in figure 5 recognizable, V-shaped so that they can be easily inserted into corresponding contact slots to mount the load-break switch 1 on the current-carrying rails.
  • the current-carrying rails are busbars, which have contact slots, contained in an insulating housing which, on the one hand, has feed-through contact slots on its front side.
  • the plug contact elements 5, 6, 7 of the NH fuse switch disconnector 1 through the feed-through slots of the insulating busbar housing inserted through into the contact slots of the corresponding busbars immediately below.
  • the load-break switch 1 is provided for three different current phases L1, L2, L3 and can be plugged into three mutually parallel busbars, which transport the different current phases.
  • These three busbars can be located in an insulating housing which has suitable feed-through contact slots on its front. In one possible embodiment, the three busbars are 60 mm apart from one another.
  • the in figure 5 recognizable plug-in contact elements 5, 6, 7 are inserted into contact slots of a corresponding rail adapter, which in turn is mounted on conventional busbars.
  • each of the plug contact elements 5A, 5B, 6A, 6B, 7A, 7B is mechanically protected by two protective ribs arranged on both sides, as in FIGS figure 5 and 7 recognizable.
  • These protective ribs prevent deformation of the plug contact elements.
  • the protective ribs are preferably designed in such a way that they can also be inserted into corresponding contact slots and thus significantly increase the mechanical stability of the load-break switch 1 placed on the busbars.
  • the housing 2 of the NH fuse switch-disconnector 1 has a clamping device for each current phase L for connecting a device to the switch-disconnector 1.
  • clamping devices are located on the lower front side of the Switch disconnector 1 provided.
  • the access contacts are designed as clamping contacts and can make mechanical and electrical contact with solid busbars, which preferably have a rectangular cross section.
  • the load-break switch 1 has three frame clamping devices 8-1, 8-2, 8-3 for three current phases L1, L2, L3 in the assembled state on the lower face. Power contact lines of a device to be connected can be inserted into the frame clamping devices 8-1, 8-2, 8-3 and tightened using an associated screw 9-1, 9-2, 9-3. Other types of clamps, such as spring clamps, are possible.
  • the housing 2 of the NH fuse switch disconnector 1 When installed, the housing 2 of the NH fuse switch disconnector 1 has supply slots 10 on its lower face for supplying a cooling medium, in particular air. Furthermore, the housing 2 has in the assembled state of the load-break switch 1 on its upper face slots 11 for Dissipation of the waste heat generated by the NH fuses. Furthermore, the housing 2 has dissipation slots 12 located on its longitudinal sides, which also serve to dissipate the waste heat generated by the NH fuses.
  • the operating unit 3 of the NH fuse switch disconnector 1 preferably has an actuating handle 3A which is provided with two guide brackets 3B, 3C which are connected to the switching mechanism for the NH fuses.
  • the two guide brackets 3B, 3C can be connected to a snap-action switching mechanism for operator-independent switching of the switching contact arrangement.
  • a removable fuse cover is provided on a front side or front side of the housing 2 of the NH fuse switch disconnector 1 .
  • this safety cover can have viewing windows.
  • the fuse cover covers the NH fuses.
  • the fuse cover can be locked both when the load-break switch 1 is switched on and when the load-break switch 1 is switched off.
  • the contact carrier 2B which is part of the housing 2.
  • the contact carrier 2B can be inserted into a lower part 2A.
  • the contact carrier 2B carries, as in 3 recognizable, the access contacts 5, 6, 7 and the outgoing contacts 8-i.
  • the contact carrier 2B carries the fuse contacts on the input side and the fuse contacts on the output side.
  • the fuse contacts have Lyra contacts into which a blade contact of an NH fuse can be inserted.
  • the contact carrier 2B is used for recording of three NH fuses NH1, NH2, NH3, each of which has a blade contact at both ends that can be inserted or switched into a Lyra contact.
  • the Lyra access-side contacts are each connected to one or more access contacts via an integral conductive access link.
  • each lyre contact provided on the access side is electrically connected to two symmetrically arranged access contacts, which form an access contact pair.
  • the Lyra contacts provided on the outgoing side are each electrically connected to a clamping device 8-i via an integrated conductive outgoing connection.
  • the various contacts, ie the incoming contacts 5, 6, 7, the outgoing contacts 8 and the internal fuse contacts, in particular Lyra contacts are thermally closely coupled to the contact carrier 2B, which preferably has a thermally highly conductive or thermally conductive plastic.
  • the contacts are at least partially pressed into corresponding recesses in the contact carrier 2B.
  • the load-break switch 1 has access contacts and outgoing contacts.
  • the access contacts are formed by the plug contact elements 5, 6, 7 connected to the fuse contacts.
  • the load-break switch 1 thus has six access contacts.
  • the outgoing contacts are formed by the box terminals 8-1, 8-2, 8-3.
  • the three symmetrically arranged access contacts 5A, 5B, 6A, 6B or 7A, 7B are internally connected to the corresponding access lines by means of a first fuse contact NH fuse inside the housing 2 connected. When switched on, each NH fuse is inserted or switched on on the one hand in an incoming fuse contact and on the other hand in an outgoing fuse contact.
  • the actuating handle 3A of the operating unit 3 of the load-break switch 1 can be moved downwards in the longitudinal direction of the load-break switch 1 mounted vertically on the current-carrying rails to switch off the switching contact arrangement located in the contact carrier 2B. Conversely, the operating unit 3 is moved upwards to switch on the switching contact arrangement of the load-break switch 1 mounted vertically on the current-carrying rails. This makes it easier to switch off or pull out the NH fuses from the Lyra contacts quickly.
  • the power density (Watt/cm 3 ) of the power isolating switch 1 is significantly increased compared to conventional power isolating switches.
  • the power density indicates the maximum power loss of the fuses in relation to the device or housing volume.
  • the fuses have a power loss of up to 9 watts.
  • Conventional devices have a power density of 0.022 watts/cm 3 .
  • the NH fuse switch disconnector according to the invention has a power density of 0.036 watts/cm 3 based on a maximum power loss of 3 NH fuses (corresponding to 25 watts) and a device or housing volume of the housing 2 .
  • Circuit breaker 1 is particularly suitable for NH000 fuses. Furthermore, circuit breaker 1 can also be used for NH fuses of type NH00.
  • the housing 2 has the NH fuse switch disconnector 1 has a width of 49.5 mm, a height of 164 mm and a depth of 85 mm.
  • the housing 2 of the switch-disconnector 1 is therefore relatively small compared to conventional switch-disconnector housings (conventional circuit-breakers have, for example, a width of 53 mm and a height of 200 mm).
  • the installation space or installation space required by the load-break switch 1 according to the invention, in particular within a switch cabinet, is correspondingly small, so that more space remains for other devices or current consumers mounted on the busbars.
  • the air supplied from below through the feed slots 10 flows around the LV HRC fuses NH1, NH2 which are located below in the installed state and which are provided, for example, for the phases L1, L3, and the waste heat from the LV HRC fuses NH1, NH2 located below is discharged to the side discharged upwards through the discharge slots 11, 12 from the housing 2 to the environment by convection past the NH fuse NH3 arranged above.
  • the heated air can flow out between the operating element 3 through the discharge slots 11, 12, for example. This is also shown schematically in 6 shown.
  • the input and output contacts of the NH -fuse switch-disconnector 1 embedded in the thermally conductive contact carrier 2B which dissipates the thermal energy in a targeted manner from the critical area of the lower NH fuses NH1, NH2 to the area of the third NH fuse NH3 arranged at the top and to the upper end face of the housing 2. There she can Heat energy are released to the environment by convection and / or radiation.
  • the embodiment described in connection with the various figures relate to a load-break switch 1 with three NH fuses. Further embodiments of the load-break switch 1 are possible, in which more than three NH fuses are integrated within the housing 2. In addition, further embodiments of the load-break switch 1 according to the invention are possible.
  • the operating unit is designed to be tool-safe, for example IP30.
  • the guide brackets 3B, 3C of the operating unit 3 can be guided in a tool-safe operating unit 3 of the housing 2.
  • the guide brackets 3B, 3C of the actuating handle 3A of the tool-safe operating unit 3 can be guided in associated side parts of the housing 2 of the load-break switch 1 along several protective bulges.
  • these protective bulges can be nested with one another in such a way that no tool can be inserted into the interior of the housing 2 of the NH fuse switch disconnector 1 .
  • the guide brackets 3B, 3C of the actuating handle 3A of the tool-safe operating unit 3 each have at least one S-shaped bulge that encloses at least one associated protective bulge without contact.
  • the NH fuses that can be used in the NH fuse switch-disconnector 1 can preferably each be switched in a current path with a switching contact arrangement.
  • the blade contacts of the NH fuses are used in two opposite fuse contacts, in particular Lyra contacts, of a pair of fuse contacts.
  • Other design variants of the load-break switch 1 according to the invention are possible.
  • integrated ventilation ducts can be provided within the housing 2 of the NH fuse switch disconnector 1 in order to dissipate the waste heat and/or switching gases upwards.
  • the NH fuse switch disconnector 1 is mounted in a vertical orientation on horizontally arranged current-carrying rails or busbars. This achieves a significant saving in space, for example within a control cabinet.
  • the actuating handle 3A of the operating unit 3 can be sealed both when it is switched on and when it is switched off.
  • the NH fuse switch disconnector 1 can have a mechanical cover lock for locking the protective cover in a possible embodiment variant.
  • the fuse or protective cover preferably covers the screws 9-i of the box terminals 8-i when the NH fuse switch-disconnector 1 is switched on, i.e. when the actuating handle 3A of the operating unit 3 is at the top. This increases safety for the user.
  • the viewing pane can be moved upwards in order to release inspection holes. The test holes allow the user to carry out a voltage test on the NH fuses.
  • the contact carrier 2B preferably contains a thermally conductive plastic.
  • the lower part 2A and the fuse cover of the housing 2 are preferably formed from a heat-insulating plastic.

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  • Fuses (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Description

Die Erfindung betrifft einen NH-Sicherungs-Lasttrennschalter für NH-Sicherungen mit hoher Leistungsdichte.The invention relates to an NH fuse load-break switch for NH fuses with a high power density.

Lasttrennschalter dienen zur Trennung einer Last bzw. eines Verbrauchers oder Gerätes von einem Strom- bzw. Spannungsverteilsystem. Ein Stromverteilsystem kann eine oder mehrere Stromversorgungsschienen umfassen, insbesondere Stromsammelschienen. Die Verbraucher bzw. Lasten sind über den Lasttrennschalter an das Stromverteilsystem angeschlossen. Der Lasttrennschalter kann einsetzbare Sicherungen, insbesondere NH-Sicherungen, enthalten. Zum Trennen der Stromphasen von den Lasten bzw. Verbrauchern kann ein Nutzer bzw. eine Bedienperson einen Betätigungsgriff manuell betätigen, um Schaltkontakte innerhalb des Lasttrennschalters zu öffnen.Load-break switches are used to disconnect a load or consumer or device from a current or voltage distribution system. A power distribution system can include one or more power supply rails, in particular power busbars. The consumers or loads are connected to the power distribution system via the load-break switch. The load-break switch can contain usable fuses, in particular NH fuses. To disconnect the current phases from the loads or consumers, a user or an operator can manually actuate an actuating handle in order to open switch contacts within the load-break switch.

Durch die in dem Gehäuse des NH-Sicherungs-Lasttrennschalters befindlichen NH-Sicherungen entsteht eine erhebliche Abwärme bzw. Wärmeentwicklung. Daher besitzen herkömmliche Lasttrennschalter ein relativ großes Gehäuse und benötigen dementsprechend viel Bauraum bzw. Platz bei ihrer Montage, beispielsweise innerhalb eines Schaltschrankes.The NH fuses located in the housing of the NH fuse switch-disconnector generate considerable waste heat or heat. For this reason, conventional load-break switches have a relatively large housing and accordingly require a large amount of structural space or space when they are installed, for example inside a control cabinet.

EP 2913835 A1 offenbart eine Sicherungslasttrennleiste für Niederspannungs-Hochleistungs-Sicherungen, wobei innerhalb eines Gehäuses der Sicherungslasttrennleiste für jede zu trennende Stromphase ein Sicherungskontaktpaar zur Aufnahme einer Sicherung vorgesehen ist, wobei eine von den Sicherungen erzeugte Verlustleistungswärme in mindestens einem seitlich an dem Gehäuse der Sicherungslasttrennleiste vorgesehenen Wärmeableitkanal abgeleitet wird. EP 2913835 A1 discloses a fuse load-break switch for low-voltage, high-performance fuses, with a fuse contact pair for receiving within a housing of the fuse load-break switch for each current phase to be separated a fuse is provided, with heat loss generated by the fuses being dissipated in at least one heat dissipation channel provided laterally on the housing of the fuse switch disconnector.

DE 9310753 U1 offenbart ein durch ein Gehäuse vollständig gekapseltes dreipoliges Sicherungselement zum direkten Aufsetzen auf Stromschienensysteme mit einem federnden Rasthebel zum formschlüssigen Verriegeln des Sicherungselements mit einer der Stromschienen, wobei sämtliche Klemmen der Abgangsleitungen im Bereich der unteren Stirnseite des Gehäuses auf einer Höhe liegen und daß sowohl im Bereich der oberen Gehäusestirnseite als auch im Bereich der unteren Gehäusestirnseite mehrere Lüftungsschlitze angeordnet sind. DE 9310753 U1 discloses a three-pole fuse element, completely encapsulated by a housing, for direct attachment to busbar systems, with a resilient latching lever for positively locking the fuse element to one of the busbars, with all terminals of the outgoing lines being at the same height in the area of the lower end face of the housing and that both in the area of the upper housing front side and in the lower housing front side several ventilation slots are arranged.

Es ist daher eine Aufgabe der vorliegenden Erfindung, einen NH-Sicherungs-Lasttrennschalter zu schaffen, der einen geringeren Bauraum benötigt.It is therefore an object of the present invention to create an NH fuse switch disconnector that requires less installation space.

Diese Aufgabe wird erfindungsgemäß durch einen NH-Sicherungs-Lasttrennschalter mit den in Patentanspruch 1 angegebenen Merkmalen gelöst.This object is achieved according to the invention by an NH fuse switch disconnector with the features specified in claim 1.

Die Erfindung schafft demnach einen NH-Sicherungs-Lasttrennschalter mit den Merkmalen des Patentanspruchs 1.The invention therefore creates an NH fuse switch disconnector with the features of patent claim 1.

Aufgrund einer erhöhten Leistungsdichte bietet der erfindungsgemäße NH-Sicherungs-Lasttrennschalter den Vorteil, dass das Volumen des Gehäuses des NH-Sicherungs-Lasttrennschalters verringert werden kann und dementsprechend der von dem NH-Sicherungs-Lasttrennschalter eingenommene Raum bzw. Bauraum reduziert wird.Due to an increased power density, the NH fuse switch disconnector according to the invention offers the advantage that the volume of the housing of the NH fuse switch disconnector can be reduced and accordingly the space or installation space occupied by the NH fuse switch disconnector is reduced.

Demzufolge wird bei Montage des NH-Sicherungs-Lasttrennschalters beispielsweise in einem Schaltschrank, durch den NH-Sicherungs-Lasttrennschalter relativ wenig Raum bzw. Platz eingenommen, sodass mehr verfügbarer Raum für weitere Geräte in dem Schaltschrank zur Verfügung steht.As a result, when the NH fuse switch disconnector is installed in a switch cabinet, for example, the NH fuse switch disconnector takes up relatively little space, so that more space is available for other devices in the switch cabinet.

Bei einer möglichen Ausführungsform des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters sind die NH-Sicherungen gleichzeitig mittels einer an dem Gehäuse angebrachten manuell betätigbaren Bedieneinheit schaltbar.In a possible embodiment of the NH fuse switch disconnector according to the invention, the NH fuses can be switched simultaneously by means of a manually operable control unit attached to the housing.

Bei einer möglichen Ausführungsform des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters ist die manuell betätigbare Bedieneinheit in Verbindung mit dem Gehäuse werkzeugsicher ausgebildet.In a possible embodiment of the NH fuse switch disconnector according to the invention, the manually operable control unit is designed to be tool-safe in connection with the housing.

Das Gehäuse umfasst bei einer möglichen Ausführungsform einen Kontaktträger und ein Unterteil.In one possible embodiment, the housing comprises a contact carrier and a lower part.

Bei einer weiteren möglichen Ausführungsform des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters ist die manuell betätigbare Bedieneinheit mit einem Schaltmechanismus für die NH-Sicherungen verbunden.In a further possible embodiment of the NH fuse switch disconnector according to the invention, the manually operable control unit is connected to a switching mechanism for the NH fuses.

Bei einer weiteren möglichen Ausführungsform des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters weist der Schaltmechanismus einen Parallelauszug für die NH-Sicherungen auf.In a further possible embodiment of the NH fuse switch disconnector according to the invention, the switching mechanism has a parallel pull-out for the NH fuses.

Bei einer weiteren möglichen alternativen Ausführungsform weist der Schaltmechanismus einen Schwenkauszug für die NH-Sicherungen auf.In a further possible alternative embodiment, the switching mechanism has a pivoting pull-out for the NH fuses.

Bei einer weiteren möglichen Ausführungsform des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters weist das Gehäuse des NH-Sicherungs-Lasttrennschalters an seiner Rückseite Montagerastelemente zur Montage des NH-Sicherungs-Lasttrennschalters an horizontal angeordnete stromführende Schienen sowie Kontaktelemente zur elektrischen Kontaktierung der stromführenden Schienen auf.In a further possible embodiment of the NH fuse switch-disconnector according to the invention, the housing of the NH fuse-switch disconnector has on its rear mounting locking elements for mounting the NH fuse-switch disconnector on horizontally arranged current-carrying rails and contact elements for making electrical contact with the current-carrying rails.

Bei einer weiteren möglichen Ausführungsform des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters ist für jede über eine zugehörige Stromsammelschiene transportierte Stromphase eine zugehörige NH-Sicherung in dem Gehäuse des NH-Sicherungs-Lasttrennschalters vorgesehen.In a further possible embodiment of the NH fuse load-break switch according to the invention, an associated NH fuse is provided in the housing of the NH fuse load-break switch for each current phase transported via an associated busbar.

Bei einer weiteren möglichen Ausführungsform des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters weist das Gehäuse des NH-Sicherungs-Lasttrennschalters an einer Stirnseite für jede Stromphase eine Klemmeinrichtung zum Anklemmen von Leitungen auf.In a further possible embodiment of the NH fuse switch disconnector according to the invention, the housing of the NH fuse switch disconnector has at one end for each current phase has a clamping device for connecting lines.

Erfindungsgemäß sind in dem Gehäuse für die drei Stromphasen drei entsprechende NH-Sicherungen zur Absicherung von drei Stromphasen L1, L2, L3 enthalten. Bei einer weiteren möglichen Ausführungsform des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters ist die in dem Gehäuse des NH-Sicherungs-Lasttrennschalters befindliche dritte NH-Sicherung im Verhältnis zu den beiden darunter liegenden nebeneinander angeordneten NH-Sicherungen in dem Gehäuse des NH-Sicherungs-Lasttrennschalters hin zu der Rückseite des Gehäuses versetzt angeordnet, wobei Abwärme, die durch die beiden nebeneinander liegenden NH-Sicherungen (NH1, NH2) erzeugt wird, zusätzlich an der Vorderseite des Gehäuses durch Konvektion abführbar ist, ohne dass die Abwärme die dritte NH-Sicherung (NH3) aufwärmt.According to the invention, three corresponding NH fuses for protecting three current phases L1, L2, L3 are contained in the housing for the three current phases. In a further possible embodiment of the NH fuse switch-disconnector according to the invention, the third NH fuse located in the housing of the NH fuse switch-disconnector is in relation to the two NH fuses arranged next to one another below in the housing of the NH fuse switch-disconnector offset to the rear of the housing, with waste heat generated by the two adjacent NH fuses (NH1, NH2) also being able to be dissipated at the front of the housing by convection without the waste heat affecting the third NH fuse (NH3 ) warms up.

Bei einer weiteren möglichen Ausführungsform des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters weist das Gehäuse des NH-Sicherungs-Lasttrennschalters im montierten Zustand des NH-Sicherungs-Lasttrennschalters an einer unteren Stirnseite des Gehäuses Zuführschlitze zur Zuführung eines Kühlmediums und an einer oberen Stirnseite sowie an einer an Längsseiten des Gehäuses befindliche Abführschlitze zum Abführen der von den NH-Sicherungen erzeugten Abwärme auf.In a further possible embodiment of the LV HRC fuse switch disconnector according to the invention, the housing of the LV HRC fuse switch disconnector has feed slots for supplying a cooling medium on a lower face of the housing and on an upper face and on a when the NH fuse switch disconnector is in the installed state Dissipation slots located on the longitudinal sides of the housing for dissipating the waste heat generated by the NH fuses.

Bei einer weiteren möglichen Ausführungsform des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters ist die Bedieneinheit des NH-Sicherungs-Lasttrennschalters mit einem Betätigungsgriff versehen, der zwei Führungsbügel aufweist, die mit dem Schaltmechanismus des NH-Sicherungs-Lasttrennschalters verbunden sind.In a further possible embodiment of the NH fuse switch disconnector according to the invention, the operating unit of the NH fuse switch disconnector is provided with an actuating handle which has two guide brackets which are connected to the switching mechanism of the NH fuse switch disconnector.

Bei einer weiteren möglichen Ausführungsform des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters ist an einer Frontseite bzw. Vorderseite des Gehäuses des NH-Sicherungs-Lasttrennschalters ein Sicherungsdeckel vorgesehen, welcher die NH-Sicherungen abdeckt.In a further possible embodiment of the NH fuse switch disconnector according to the invention, a fuse cover is provided on a front side or front side of the housing of the NH fuse switch disconnector, which covers the NH fuses.

Bei einer möglichen Ausführungsform des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters besitzt der Sicherungsdeckel an der Vorderseite des Gehäuses Sichtscheiben.In a possible embodiment of the NH fuse switch disconnector according to the invention, the fuse cover has viewing windows on the front side of the housing.

Bei einer weiteren möglichen Ausführungsform des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters ist der Sicherungsdeckel des NH-Sicherungs-Lasttrennschalters sowohl in einem eingeschalteten Schaltzustand des NH-Sicherungs-Lasttrennschalters als auch in einem ausgeschalteten Schaltzustand des NH-Sicherungs-Lasttrennschalters abschließbar.In a further possible embodiment of the NH fuse switch disconnector according to the invention, the fuse cover of the NH fuse switch disconnector can be locked both when the NH fuse switch disconnector is switched on and when the NH fuse switch disconnector is switched off.

Bei einer weiteren möglichen Ausführungsform des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters weist das Gehäuse des NH-Sicherungs-Lasttrennschalters einen Kontaktträger auf, der einen wärmeleitfähigen Kunststoff beinhaltet.In a further possible embodiment of the NH fuse switch disconnector according to the invention, the housing of the NH fuse switch disconnector has a contact carrier which contains a thermally conductive plastic.

Im Weiteren werden mögliche Ausführungsformen des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters unter Bezugnahme auf die beigefügten Figuren näher erläutert.

Fig. 1
zeigt eine räumliche Ansicht auf ein exemplarisches Ausführungsbeispiel des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters ohne Sicherungsde-ckel;
Fig. 2
zeigt eine Seitenansicht auf ein Ausführungsbei-spiel des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters ohne Sicherungsdeckel und Bedie-neinheit;
Fig. 3
zeigt eine isometrische Ansicht auf ein Ausfüh-rungsbeispiel des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters zur Darstellung der Sicherungs-kontaktträger mit Zugangs- und Abgangskontakten;
Fig. 4
zeigt eine Ansicht von unten auf ein Ausführungs-beispiel des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters;
Fig. 5
zeigt eine weitere Ansicht auf ein Ausführungsbei-spiel des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters;
Fig. 6
zeigt eine Vorderansicht auf ein Ausführungsbei-spiel des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters zur Erläuterung der Belüftungs-funktion;
Fig. 7
zeigt eine Ansicht von unten auf ein Ausführungs-beispiel des erfindungsgemäßen NH-Sicherungs-Lasttrennschalters.
Possible embodiments of the NH fuse switch disconnector according to the invention are explained in more detail below with reference to the accompanying figures.
1
shows a three-dimensional view of an exemplary embodiment of the NH fuse switch disconnector according to the invention without a fuse cover;
2
shows a side view of an exemplary embodiment of the NH fuse switch disconnector according to the invention without a fuse cover and operating unit;
3
shows an isometric view of an exemplary embodiment of the NH fuse switch disconnector according to the invention to show the fuse contact carrier with incoming and outgoing contacts;
4
shows a view from below of an exemplary embodiment of the NH fuse switch disconnector according to the invention;
figure 5
shows another view of an exemplary embodiment of the NH fuse switch disconnector according to the invention;
6
shows a front view of an exemplary embodiment of the NH fuse switch disconnector according to the invention to explain the ventilation function;
7
shows a view from below of an exemplary embodiment of the NH fuse switch disconnector according to the invention.

Fig. 1 zeigt ein Ausführungsbeispiel eines erfindungsgemäßen NH-Sicherungs-Lasttrennschalters 1 gemäß der Erfindung. Der NH-Sicherungs-Lasttrennschalter bzw. Lasttrennschalter 1 ist für mehrere NH-Sicherungen vorgesehen. Der Lasttrennschalter 1 besitzt ein Gehäuse 2. Das Gehäuse 2 ist vorzugsweise zweiteilig ausgebildet und umfasst ein Unterteil 2A und einen Kontaktträger 2B. Bei einer bevorzugten Ausführungsform beinhaltet der Kontaktträger 2B einen wärmeleitfähigen Kunststoff. Das Gehäuse 2 des Lasttrennschalters 1 dient zur Aufnahme mehrerer NH-Sicherungen. Hierzu ist vorzugsweise ein wärmeleitfähiger Kontaktträger 2B vorgesehen, wie er beispielsweise in Fig. 3 dargestellt ist. In dem dargestellten Ausführungsbeispiel enthält das Gehäuse 2 des Lasttrennschalters 1 drei NH-Sicherungen NH1, NH2, NH3 für drei verschiedene Stromphasen L1, L2, L3. Der NH-Sicherungs-Lasttrennschalter 1 kann auf stromführende Schienen, insbesondere Stromsammelschienen, montiert werden. Im montierten Zustand ist das Gehäuse 2 des Lasttrennschalters 1 vertikal ausgerichtet. Dabei wird Abwärme, die von in dem Gehäuse 2 befindlichen NH-Sicherungen erzeugt wird, durch Konvektion innerhalb des Gehäuses 2 seitlich an darüber angeordneten NH-Sicherungen vorbei nach oben aus dem Gehäuse 2 an die Umgebung abgeführt. 1 shows an embodiment of an inventive NH fuse switch disconnector 1 according to the invention. The NH fuse switch-disconnector or load-break switch 1 is intended for several NH fuses. The load-break switch 1 has a housing 2. The housing 2 is preferably formed in two parts and comprises a lower part 2A and a contact carrier 2B. In a preferred embodiment, the contact carrier 2B includes a thermally conductive plastic. The housing 2 of the load-break switch 1 is used to hold several NH fuses. For this purpose, a thermally conductive contact carrier 2B is preferably provided, as is shown, for example, in 3 is shown. In the illustrated embodiment, the housing 2 contains the circuit breaker 1 three NH fuses NH1, NH2, NH3 for three different current phases L1, L2, L3. The NH fuse switch disconnector 1 can be mounted on current-carrying rails, in particular busbars. When assembled, the housing 2 of the load-break switch 1 is aligned vertically. Waste heat generated by NH fuses located in the housing 2 is dissipated by convection inside the housing 2 laterally past the NH fuses arranged above and upwards out of the housing 2 to the environment.

Die in dem elektrisch isolierenden Gehäuse 2 befindlichen NH-Sicherungen, beispielsweise die drei in Fig. 1 dargestellten NH-Sicherungen NH1, NH2, NH3, sind gleichzeitig mit mittels einer an dem Gehäuse 2 angebrachten manuellen betätigbaren Bedieneinheit 3 schaltbar. Die manuell betätigbare Bedieneinheit 3 kann bei einer möglichen Ausführungsform zusammen mit dem Gehäuse 2 werkzeugsicher ausgebildet sein. Die manuell betätigbare Bedieneinheit 3 ist mit einem Schaltmechanismus für die NH-Sicherungen verbunden. Dieser Schaltmechanismus weist bei einer möglichen Ausführungsform einen Parallelauszug zum Schalten der NH-Sicherungen auf. Bei einer alternativen Ausführungsform kann der Schaltmechanismus auch einen Schwenkauszug für die NH-Sicherungen mit einem Drehpunkt aufweisen, der vorzugsweise am unteren Ende des Gehäuses 2 des NH-Sicherungs-Lasttrennschalters 1 angeordnet ist. Der Schaltmechanismus bietet eine Mechanik zum Ein- und Ausfahren der Sicherungen aus Sicherungshalterungen. Jede der NH-Sicherungen kann für eine bestimmte Phase L1, L2, L3 des Stromversorgungsnetzes vorgesehen sein. Bei dem in Fig. 1 dargestellten Ausführungsbeispiel sind in dem Gehäuse 2 drei NH-Sicherungen zur Absicherung von drei Stromphasen L1, L2, L3 enthalten. Das Gehäuse 2 enthält eine erste NH-Sicherung NH1 und eine zweite NH-Sicherung NH2, die nebeneinander angeordnet sind, wie in Fig. 1 erkennbar. Über diesen beiden nebeneinander liegenden NH-Sicherungen NH1, NH2 ist eine dritte NH-Sicherung NH3 angeordnet. Bei einer möglichen Ausführungsform besteht zwischen den beiden NH-Sicherungen NH1 und NH2 ein Spalt, der im montierten Zustand des Gehäuses 2 vertikal ausgerichtet ist und wie ein Kamin eine Konvektion von erwärmter Luft nach oben fördert. Abwärme, welche durch die erste NH-Sicherung NH1 erzeugt wird, wird an einer ersten Seitenoberfläche der dritten oben liegenden NH-Sicherung NH3 vorbeigeführt. Ferner wird die Abwärme, welche durch die zweite daneben angeordnete NH-Sicherung NH2 erzeugt wird, seitlich an einer gegenüberliegenden Seitenoberfläche der oben liegenden dritten NH-Sicherung NH3 vorbeigeführt, ohne die dritte NH-Sicherung NH3 dabei aufzuwärmen bzw. aufzuheizen. Die verschiedenen NH-Sicherungen können für verschiedene Phasen L vorgesehen sein. Beispielsweise ist in dem dargestellten Ausführungsbeispiel die erste NH-Sicherung NH1 für eine erste Stromphase L1, die zweite NH-Sicherung NH2 für eine dritte Stromphase L3 und die dritte NH-Sicherung NH3 für eine zweite Stromphase L2 vorgesehen. Die Abwärme der NH-Sicherungen NH1 und NH2 für die Stromphasen L1, L3 werden dementsprechend seitlich an der NH-Sicherung NH3 für die Stromphase L2 vorbei nach oben abgeführt (Konvektion), ohne im Betrieb diese dritte , für die Stromphase L2 vorgesehene NH-Sicherung NH3 zusätzlich aufzuheizen.The NH fuses located in the electrically insulating housing 2, for example the three in 1 NH fuses NH1, NH2, NH3 shown can be switched at the same time by means of a manually operated control unit 3 attached to the housing 2. In one possible embodiment, the manually operable operating unit 3 can be designed to be tool-safe together with the housing 2 . The manually operable control unit 3 is connected to a switching mechanism for the NH fuses. In one possible embodiment, this switching mechanism has a parallel pull-out for switching the NH fuses. In an alternative embodiment, the switching mechanism can also have a pivoting pull-out for the NH fuses with a pivot point, which is preferably arranged at the lower end of the housing 2 of the NH fuse switch disconnector 1 . The switching mechanism provides a mechanism for moving the fuses in and out of fuse holders. Each of the NH fuses can be provided for a specific phase L1, L2, L3 of the power supply network. At the in 1 In the exemplary embodiment illustrated, the housing 2 contains three NH fuses to protect three current phases L1, L2, L3. The housing 2 contains a first NH fuse NH1 and a second NH fuse NH2 arranged side by side as in 1 recognizable. A third NH fuse NH3 is arranged above these two adjacent NH fuses NH1, NH2. In one possible embodiment, there is a gap between the two NH fuses NH1 and NH2, which is aligned vertically when the housing 2 is in the installed state and promotes upward convection of heated air like a chimney. Waste heat generated by the first NH fuse NH1 is conducted past a first side surface of the third top NH fuse NH3. Furthermore, the waste heat, which is generated by the second LV HRC fuse NH2 arranged next to it, is conducted laterally past an opposite side surface of the third LV HRC fuse NH3 lying on top, without warming up or heating up the third LV HRC fuse NH3 in the process. The various NH fuses can be provided for different L phases. For example, in the illustrated embodiment, the first NH fuse NH1 is provided for a first current phase L1, the second NH fuse NH2 for a third current phase L3 and the third NH fuse NH3 for a second current phase L2. The waste heat from the NH1 and NH2 fuses for the current phases L1, L3 is accordingly dissipated upwards (convection) to the side past the NH3 fuse for the current phase L2, without this third NH fuse intended for the current phase L2 during operation additional heating of the NH3.

Fig. 2 zeigt eine Seitenansicht auf das in Fig. 1 dargestellte Ausführungsbeispiel eines NH-Sicherungs-Lasttrennschalters 1, allerdings ohne Darstellung der Bedieneinheit 3 und des Deckels. Wie man aus Fig. 2 gut erkennen kann, ist bei dieser Ausführungsform des Lasttrennschalters 1 die in dem Gehäuse 2 befindliche dritte NH-Sicherung NH3 im Verhältnis zu den beiden im montierten Zustand darunter liegenden nebeneinander angeordneten NH-Sicherungen NH1, NH2 in dem Gehäuse 2 hin zu der Rückseite des Gehäuses 2 versetzt angeordnet. Die NH-Sicherung NH3 liegt somit gewissermaßen tiefer, d.h. zu der Rückseite hin versetzt, als die Sicherungen NH1, NH2. Hierdurch ist es möglich, dass zusätzlich Abwärme durch einen Sicherungsdeckel des Lasttrennschalters 1 im montierten Zustand nach oben abgeführt werden kann. 2 shows a side view of the in 1 illustrated embodiment of an NH fuse switch disconnector 1, but without showing the control unit 3 and the cover. how to get out 2 can be seen well, in this embodiment of the load-break switch 1, the third NH fuse located in the housing 2 is NH3 in relation to the two in the installed state, the NH fuses NH1, NH2 arranged next to one another underneath are offset in the housing 2 toward the rear of the housing 2. The NH fuse NH3 is thus to a certain extent lower, ie offset towards the rear, than the fuses NH1, NH2. This makes it possible for additional waste heat to be dissipated upwards through a fuse cover of the load-break switch 1 in the installed state.

Das Gehäuse 2 des NH-Sicherungs-Lasttrennschalters 1 weist an seiner Rückseite Montageelemente zur Montage des Lasttrennschalters 1 an horizontal angeordnete stromführende Schienen, insbesondere Stromsammelschienen, auf. Diese Montageelemente umfassen beispielsweise Rastelemente zur mechanischen Verbindung mit entsprechenden Anschlusskonturen. Bei dem in Fig. 2 dargestellten Ausführungsbeispiel umfassen die Montageelemente beispielsweise vier Rasthaken, die geeignet sind, das Gerät bzw. Gehäuse auf entsprechende Anschlusskonturen mechanisch zu fixieren. In Fig. 2 sind zwei dieser Rasthaken bzw. Rastelemente 4-1, 4-2, die an der Rückseite des Gehäuses 2 vorgesehen sind, erkennbar. Figur 7 zeigt eine Ansicht von hinten bei der alle vier Rasthaken 4-1, 4-2, 4-3, 4-4 erkennbar sind. Weiterhin sind an dem Gehäuse 2 des Lasttrennschalters 1 Kontaktelemente zur elektrischen Kontaktierung von stromführenden Schienen, insbesondere Stromsammelschienen, vorgesehen. Bei einer möglichen Ausführungsform sind für jede Stromphase L jeweils ein oder mehrere Steckkontaktelemente an der Rückseite des Gehäuses 2 des NH-Sicherungs-Lasttrennschalters 1 vorgesehen, die in entsprechende Kontaktschlitze einer zugehörigen Stromsammelschiene oder eines Schienenadapters für stromführende Schienen einsteckbar sind. Bei einer bevorzugten Ausführungsform sind für jede Stromphase L jeweils zwei Steckkontaktelemente zur elektrischen Kontaktierung von stromführenden Schienen an der Rückseite des Gehäuses 2 des Lasttrennschalters 1 vorgesehen.The housing 2 of the NH fuse switch-disconnector 1 has mounting elements for mounting the switch-disconnector 1 on horizontally arranged current-carrying rails, in particular busbars, on its rear side. These mounting elements include, for example, latching elements for mechanical connection with corresponding connection contours. At the in 2 In the illustrated embodiment, the mounting elements include, for example, four latching hooks that are suitable for mechanically fixing the device or housing to corresponding connection contours. In 2 two of these latching hooks or latching elements 4-1, 4-2, which are provided on the back of the housing 2, can be seen. figure 7 shows a rear view in which all four latching hooks 4-1, 4-2, 4-3, 4-4 can be seen. Furthermore, on the housing 2 of the load-break switch 1, contact elements are provided for making electrical contact with current-carrying rails, in particular busbars. In one possible embodiment, one or more plug-in contact elements are provided for each current phase L on the back of the housing 2 of the NH fuse switch disconnector 1, which can be inserted into corresponding contact slots of an associated busbar or a rail adapter for current-carrying rails. In a preferred embodiment, two plug-in contact elements are available for each current phase L electrical contacting of current-carrying rails on the back of the housing 2 of the load-break switch 1 is provided.

Fig. 5 und Fig. 7 zeigen ein Ausführungsbeispiel, bei dem an der Rückseite des Gehäuses 2 des Lasttrennschalters 1 jeweils zwei Steckkontaktelemente für jede Phase L vorgesehen sind. Die beiden oberen elektrischen Steckkontakte 5A, 5B dienen zur Kontaktierung einer ersten stromführenden Schiene, die in der Mitte liegenden elektrischen Steckkontaktelemente 6A, 6B dienen zur Kontaktierung einer zweiten stromführenden Schiene und die im montierten Zustand unten liegenden elektrischen Steckkontaktelemente 7A, 7B dienen zur Kontaktierung einer dritten stromführenden Schiene. Bei den stromführenden Schienen handelt es sich vorzugsweise um Stromsammelschienen. Diese Stromsammelschienen besitzen bei einer bevorzugten Ausführungsform entsprechende Kontaktschlitze. Diese Kontaktschlitze sind in einem vorgegebenen Raster quer zu der Längsrichtung der stromführenden Schiene bzw. Stromsammelschiene angeordnet. Eine stromführende Stromsammelschiene weist demzufolge eine Vielzahl von gleichmäßig beabstandeten Kontaktschlitzen auf, die zur Aufnahme der entsprechenden Steckkontaktelemente ausgebildet sind. Die Steckkontaktelemente 5, 6, 7 bestehen aus einem elektrisch leitfähigen Material und sind, wie in Fig. 5 erkennbar, V-förmig ausgebildet, sodass sie leicht in entsprechende Kontaktschlitze einführbar sind, um den Lasttrennschalter 1 auf den stromführenden Schienen zu montieren. Bei einer möglichen Ausführungsform sind die stromführenden Schienen Stromsammelschienen, welche Kontaktschlitze besitzen, in einem isolierenden Gehäuse enthalten, das an seiner Frontseite einerseits Durchführkontaktschlitze besitzt. Bei dieser Ausführungsform werden die Steckkontaktelemente 5, 6, 7 des NH-Sicherungs-Lasttrennschalters 1 durch die Durchführschlitze des isolierenden Stromsammelschienengehäuses hindurch in die unmittelbar darunter liegenden Kontaktschlitze der entsprechenden Stromsammelschienen eingesteckt. Bei dem in Fig. 5 dargestellten Ausführungsbeispiel ist der Lasttrennschalter 1 für drei verschiedene Stromphasen L1, L2, L3 vorgesehen und kann in drei zueinander parallel ausgerichtete Stromsammelschienen, welche die verschiedenen Stromphasen transportieren, eingesteckt werden. Diese drei Stromsammelschienen können sich in einem isolierenden Gehäuse befinden, das an seiner Frontseite geeignete Durchführkontaktschlitze besitzt. Bei einer möglichen Ausführungsform haben die drei Stromsammelschienen zueinander einen Abstand von 60 mm. Alternativ können die in Fig. 5 erkennbaren Steckkontaktelemente 5, 6, 7 in Kontaktschlitze eines entsprechenden Schienenadapters eingesteckt werden, der seinerseits auf konventionelle Stromsammelschienen montiert ist. figure 5 and 7 show an embodiment in which two plug-in contact elements for each phase L are provided on the back of the housing 2 of the load-break switch 1. The two upper electrical plug contacts 5A, 5B are used to contact a first current-carrying rail, the electrical plug contact elements 6A, 6B in the middle are used to contact a second current-carrying rail and the electrical plug contact elements 7A, 7B at the bottom in the assembled state are used to contact a third live rail. The current-carrying rails are preferably busbars. In a preferred embodiment, these busbars have corresponding contact slots. These contact slots are arranged in a predetermined grid transversely to the longitudinal direction of the current-carrying rail or busbar. A current-carrying busbar accordingly has a multiplicity of evenly spaced contact slots which are designed to accommodate the corresponding plug-in contact elements. The plug contact elements 5, 6, 7 consist of an electrically conductive material and, as in figure 5 recognizable, V-shaped so that they can be easily inserted into corresponding contact slots to mount the load-break switch 1 on the current-carrying rails. In one possible embodiment, the current-carrying rails are busbars, which have contact slots, contained in an insulating housing which, on the one hand, has feed-through contact slots on its front side. In this embodiment, the plug contact elements 5, 6, 7 of the NH fuse switch disconnector 1 through the feed-through slots of the insulating busbar housing inserted through into the contact slots of the corresponding busbars immediately below. At the in figure 5 In the illustrated embodiment, the load-break switch 1 is provided for three different current phases L1, L2, L3 and can be plugged into three mutually parallel busbars, which transport the different current phases. These three busbars can be located in an insulating housing which has suitable feed-through contact slots on its front. In one possible embodiment, the three busbars are 60 mm apart from one another. Alternatively, the in figure 5 recognizable plug-in contact elements 5, 6, 7 are inserted into contact slots of a corresponding rail adapter, which in turn is mounted on conventional busbars.

Erfindungsgemäß ist jeder der Steckkontaktelemente 5A, 5B, 6A, 6B, 7A, 7B durch zwei beidseitig angeordnete Schutzrippen mechanisch geschützt, wie in den Fig. 5 und Fig. 7 erkennbar. Diese Schutzrippen verhindern eine Verformung der Steckkontaktelemente. Zudem sind die Schutzrippen vorzugsweise derart ausgebildet, dass sie ebenfalls in entsprechende Kontaktschlitze einführbar sind und somit die mechanische Stabilität des auf die Stromsammelschienen aufgesetzten Lasttrennschalters 1 signifikant erhöhen. Ein Vorteil der in Fig. 5 und Fig. 7 dargestellten Ausführungsform besteht darin, dass der Lasttrennschalter 1 direkt von vorne auf entsprechend horizontal verlaufende Stromsammelschienen, welche über Kontaktschlitze verfügen, aufsetzbar ist, ohne dass es eines Montagewerkzeuges bedarf. Weiterhin kann der in Fig. 5 dargestellte Lasttrennschalter 1 aufgrund der elektrischen Steckkontaktelemente auch wieder in einfacher Weise von entsprechenden horizontal ausgerichteten Stromsammelschienen aus deren Kontaktschlitzen heraus abgezogen werden. Die Montage und Demontage des in Fig. 5 dargestellten Lasttrennschalters 1 ist demzufolge besonders einfach und schnell ausführbar.According to the invention, each of the plug contact elements 5A, 5B, 6A, 6B, 7A, 7B is mechanically protected by two protective ribs arranged on both sides, as in FIGS figure 5 and 7 recognizable. These protective ribs prevent deformation of the plug contact elements. In addition, the protective ribs are preferably designed in such a way that they can also be inserted into corresponding contact slots and thus significantly increase the mechanical stability of the load-break switch 1 placed on the busbars. An advantage of the figure 5 and 7 The illustrated embodiment is that the switch-disconnector 1 can be placed directly from the front onto busbars that run horizontally and have contact slots, without the need for an assembly tool. Furthermore, the in figure 5 Load-break switch 1 shown due to the electrical plug-in contact elements again in a simple manner from corresponding horizontally aligned busbars be pulled out of their contact slots. The assembly and disassembly of the in figure 5 The load-break switch 1 shown can therefore be implemented particularly easily and quickly.

Das Gehäuse 2 des NH-Sicherungs-Lasttrennschalters 1 besitzt bei einer bevorzugten Ausführungsform für jede Stromphase L eine Klemmeinrichtung zum Anklemmen eines Gerätes an den Lasttrennschalter 1. Bei einer bevorzugten Ausführungsform sind im montierten Zustand des Gehäuses 2 des Lasttrennschalters 1 Klemmeinrichtungen an der unteren Stirnseite des Lasttrennschalters 1 vorgesehen.In a preferred embodiment, the housing 2 of the NH fuse switch-disconnector 1 has a clamping device for each current phase L for connecting a device to the switch-disconnector 1. In a preferred embodiment, when the housing 2 of the switch-disconnector 1 is in the installed state, clamping devices are located on the lower front side of the Switch disconnector 1 provided.

Bei einer anderen Ausführungsform des NH-Sicherungslasttrennschalters sind die Zugangskontakte als Klemmkontakte ausgeführt und können massive Sammelschienen, die vorzugsweise einen rechteckförmigen Querschnitt aufweisen, mechanisch und elektrisch kontaktieren.In another embodiment of the NH fuse switch disconnector, the access contacts are designed as clamping contacts and can make mechanical and electrical contact with solid busbars, which preferably have a rectangular cross section.

Wie in Fig. 3 deutlich erkennbar, besitzt der Lasttrennschalter 1 im montierten Zustand an der unteren Stirnseite drei Rahmenklemmeinrichtungen 8-1, 8-2, 8-3 für drei Stromphasen L1, L2, L3. Stromkontaktierungsleitungen eines anzuschließenden Gerätes können in die Rahmenklemmeinrichtungen 8-1, 8-2, 8-3 eingesetzt werden und mithilfe einer zugehörigen Schraube 9-1, 9-2, 9-3 festgezogen werden. Andere Arten von Klemmeinrichtungen, wie etwa Federzugklemmen, sind möglich.As in 3 clearly recognizable, the load-break switch 1 has three frame clamping devices 8-1, 8-2, 8-3 for three current phases L1, L2, L3 in the assembled state on the lower face. Power contact lines of a device to be connected can be inserted into the frame clamping devices 8-1, 8-2, 8-3 and tightened using an associated screw 9-1, 9-2, 9-3. Other types of clamps, such as spring clamps, are possible.

Das Gehäuse 2 des NH-Sicherungs-Lasttrennschalters 1 hat im montierten Zustand an seiner unteren Stirnseite Zuführschlitze 10 zum Zuführen eines Kühlmediums, insbesondere Luft. Weiterhin besitzt das Gehäuse 2 im montierten Zustand des Lasttrennschalters 1 an seiner oberen Stirnseite Schlitze 11 zum Abführen der von den NH-Sicherungen erzeugten Abwärme. Weiterhin besitzt das Gehäuse 2 an seinen Längsseiten befindliche Abführschlitze 12, die ebenfalls zum Abführen der von den NH-Sicherungen erzeugten Abwärme dienen.When installed, the housing 2 of the NH fuse switch disconnector 1 has supply slots 10 on its lower face for supplying a cooling medium, in particular air. Furthermore, the housing 2 has in the assembled state of the load-break switch 1 on its upper face slots 11 for Dissipation of the waste heat generated by the NH fuses. Furthermore, the housing 2 has dissipation slots 12 located on its longitudinal sides, which also serve to dissipate the waste heat generated by the NH fuses.

Die Bedieneinheit 3 des NH-Sicherungs-Lasttrennschalters 1 besitzt vorzugsweise einen Betätigungsgriff 3A, der mit zwei Führungsbügeln 3B, 3C versehen ist, die mit dem Schaltmechanismus für die NH-Sicherungen verbunden sind. Bei einer möglichen Ausführungsvariante können die beiden Führungsbügel 3B, 3C mit einem Sprungschaltwerk zum bedienerunabhängigen Schalten der Schaltkontaktanordnung verbunden sein.The operating unit 3 of the NH fuse switch disconnector 1 preferably has an actuating handle 3A which is provided with two guide brackets 3B, 3C which are connected to the switching mechanism for the NH fuses. In a possible embodiment variant, the two guide brackets 3B, 3C can be connected to a snap-action switching mechanism for operator-independent switching of the switching contact arrangement.

An einer Frontseite bzw. Vorderseite des Gehäuses 2 des NH-Sicherungs-Lasttrennschalters 1 ist ein abnehmbarer Sicherungsdeckel vorgesehen. Dieser Sicherungsdeckel kann bei einer möglichen Ausführungsvariante Sichtscheiben aufweisen. Der Sicherungsdeckel deckt die NH-Sicherungen ab. Bei einer möglichen Ausführungsvariante ist der Sicherungsdeckel sowohl in einem eingeschalteten Schaltzustand des Lasttrennschalters 1 als auch in einem ausgeschalteten Schaltzustand des Lasttrennschalters 1 abschließbar.A removable fuse cover is provided on a front side or front side of the housing 2 of the NH fuse switch disconnector 1 . In a possible embodiment variant, this safety cover can have viewing windows. The fuse cover covers the NH fuses. In a possible embodiment variant, the fuse cover can be locked both when the load-break switch 1 is switched on and when the load-break switch 1 is switched off.

Fig. 3 zeigt den Kontaktträger 2B, welcher Teil des Gehäuses 2 ist. Der Kontaktträger 2B ist in ein Unterteil 2A einsetzbar. Der Kontaktträger 2B trägt, wie in Fig. 3 erkennbar, die Zugangskontakte 5, 6, 7 sowie die Abgangskontakte 8-i. Weiterhin trägt der Kontaktträger 2B die zugangsseitigen Sicherungskontakte sowie die abgangsseitigen Sicherungskontakte. Die Sicherungskontakte weisen bei einer möglichen Ausführungsform Lyra-Kontakte auf, in die ein Messerkontakt einer NH-Sicherung einsetzbar ist. Bei dem in Fig. 3 dargestellten Ausführungsbeispiel dient der Kontaktträger 2B zur Aufnahme von drei NH-Sicherungen NH1, NH2, NH3, die an beiden Enden jeweils einen Messerkontakt besitzen, der in einen Lyra-Kontakt einsetzbar bzw. einschaltbar ist. Die zugangsseitigen Lyra-Kontakte sind jeweils mit einem oder mehreren Zugangskontakten über eine integrierte leitende Zugangsverbindung verbunden. Beispielsweise ist jeder zugangsseitig vorgesehene Lyra-Kontakt mit zwei symmetrisch angeordneten Zugangskontakten elektrisch verbunden, die ein Zugangskontaktpaar bilden. Die abgangsseitig vorgesehenen Lyra-Kontakte sind jeweils mit einer Klemmeinrichtung 8-i elektrisch über eine integrierte leitende Abgangsverbindung verbunden. Die verschiedenen Kontakte, d.h. die Zugangskontakte 5, 6, 7, die Abgangskontakte 8 sowie die internen Sicherungskontakte, insbesondere Lyra-Kontakte, sind thermisch eng mit dem Kontaktträger 2B gekoppelt, der vorzugsweise einen thermisch gut leitfähigen bzw. wärmeleitfähigen Kunststoff aufweist. Bei einer möglichen Ausführungsform sind die Kontakte zumindest teilweise in entsprechende Ausnehmungen des Kontaktträgers 2B eingepresst. Hierdurch kann eine von den NH-Sicherungen erzeugte Wärme an den wärmeleitfähigen Kontaktträger 2B abfließen und durch Konvektion und/oder Wärmeabstrahlung an die Umgebung abgegeben werden. 3 shows the contact carrier 2B, which is part of the housing 2. The contact carrier 2B can be inserted into a lower part 2A. The contact carrier 2B carries, as in 3 recognizable, the access contacts 5, 6, 7 and the outgoing contacts 8-i. Furthermore, the contact carrier 2B carries the fuse contacts on the input side and the fuse contacts on the output side. In one possible embodiment, the fuse contacts have Lyra contacts into which a blade contact of an NH fuse can be inserted. At the in 3 illustrated embodiment, the contact carrier 2B is used for recording of three NH fuses NH1, NH2, NH3, each of which has a blade contact at both ends that can be inserted or switched into a Lyra contact. The Lyra access-side contacts are each connected to one or more access contacts via an integral conductive access link. For example, each lyre contact provided on the access side is electrically connected to two symmetrically arranged access contacts, which form an access contact pair. The Lyra contacts provided on the outgoing side are each electrically connected to a clamping device 8-i via an integrated conductive outgoing connection. The various contacts, ie the incoming contacts 5, 6, 7, the outgoing contacts 8 and the internal fuse contacts, in particular Lyra contacts, are thermally closely coupled to the contact carrier 2B, which preferably has a thermally highly conductive or thermally conductive plastic. In one possible embodiment, the contacts are at least partially pressed into corresponding recesses in the contact carrier 2B. As a result, heat generated by the NH fuses can flow off to the thermally conductive contact carrier 2B and be given off to the environment by convection and/or heat radiation.

Der Lasttrennschalter 1 besitzt Zugangskontakte und Abgangskontakte. Die Zugangskontakte werden bei der dargestellten Ausführungsform durch die mit den Sicherungskontakten verbundenen Steckkontaktelementen 5, 6, 7 gebildet. Bei dem in Fig. 5 dargestellten Ausführungsbeispiel besitzt der Lasttrennschalter 1 somit sechs Zugangskontakte. Die Abgangskontakte werden durch die Rahmenklemmen 8-1, 8-2, 8-3 gebildet. Die drei symmetrisch angeordneten Zugangskontakte 5A, 5B, 6A, 6B oder 7A, 7B sind intern über entsprechende Zugangsleitungen mittels eines ersten Sicherungskontaktes mit der entsprechenden NH-Sicherung innerhalb des Gehäuses 2 verbunden. Jede NH-Sicherung ist im eingeschalteten Zustand einerseits in einen zugangsseitigen Sicherungskontakt und andererseits in einen abgangsseitigen Sicherungskontakt eingesetzt bzw. eingeschaltet. Der Betätigungsgriff 3A der Bedieneinheit 3 des Lasttrennschalters 1 kann bei einer möglichen Ausführungsform zum Ausschalten der in dem Kontaktträger 2B befindlichen Schaltkontaktanordnung in Längsrichtung des vertikal auf die stromführenden Schienen montierten Lasttrennschalters 1 nach unten bewegt werden. Umgekehrt wird die Bedieneinheit 3 zum Einschalten der Schaltkontaktanordnung des vertikal auf die stromführenden Schienen montierten Lasttrennschalters 1 nach oben bewegt. Hierdurch wird ein schnelles Ausschalten bzw. Rausziehen der NH-Sicherungen aus den Lyra-Kontakten erleichtert.The load-break switch 1 has access contacts and outgoing contacts. In the illustrated embodiment, the access contacts are formed by the plug contact elements 5, 6, 7 connected to the fuse contacts. At the in figure 5 illustrated embodiment, the load-break switch 1 thus has six access contacts. The outgoing contacts are formed by the box terminals 8-1, 8-2, 8-3. The three symmetrically arranged access contacts 5A, 5B, 6A, 6B or 7A, 7B are internally connected to the corresponding access lines by means of a first fuse contact NH fuse inside the housing 2 connected. When switched on, each NH fuse is inserted or switched on on the one hand in an incoming fuse contact and on the other hand in an outgoing fuse contact. In one possible embodiment, the actuating handle 3A of the operating unit 3 of the load-break switch 1 can be moved downwards in the longitudinal direction of the load-break switch 1 mounted vertically on the current-carrying rails to switch off the switching contact arrangement located in the contact carrier 2B. Conversely, the operating unit 3 is moved upwards to switch on the switching contact arrangement of the load-break switch 1 mounted vertically on the current-carrying rails. This makes it easier to switch off or pull out the NH fuses from the Lyra contacts quickly.

Durch die Anordnung der NH-Sicherungen und das Wärmemanagement ist die Leistungsdichte (Watt/cm3) des Leistungstrennschalters 1 im Vergleich zu herkömmlichen Leistungstrennschaltern signifikant erhöht. Die Leistungsdichte gibt die maximale Verlustleistung der Sicherungen bezogen auf das Geräte- bzw. Gehäusevolumen an. Die Sicherungen weisen bei einer Ausführungsform eine Verlustleistung von bis zu 9 Watt auf. Herkömmliche Geräte haben eine Leistungsdichte von 0,022 Watt/cm3. Der erfindungsgemäße NH-Sicherungslasttrennschalter weist bei einer möglichen Ausführungsform eine Leistungsdichte von 0,036 Watt/cm3 bezogen auf eine maximale Verlustleistung von 3 NH-Sicherungen (entsprechend 25 Watt) und ein Geräte- bzw. Gehäusevolumen des Gehäuses 2 auf. Der Leistungstrennschalter 1 eignet sich insbesondere für NH000-Sicherungen. Weiterhin kann der Leistungstrennschalter 1 auch für NH-Sicherungen des Typs NH00 verwendet werden. Bei einer möglichen Ausführungsform besitzt das Gehäuse 2 des NH-Sicherungslasttrennschalters 1 eine Breite von 49,5 mm, eine Höhe von 164 mm und eine Tiefe von 85 mm. Das Gehäuse 2 des Lasttrennschalters 1 ist somit im Vergleich zu herkömmlichen Lasttrennschaltergehäusen relativ klein (herkömmliche Leistungstrennschalter besitzen beispielsweise eine Breite von 53 mm und eine Höhe von 200 mm). Der von dem erfindungsgemäßen Lasttrennschalter 1 benötigte Bauraum bzw. Montageplatz, insbesondere innerhalb eines Schaltschrankes, ist dementsprechend gering, sodass mehr Platz für weitere auf den Stromsammelschienen montierte Geräte bzw. Stromverbraucher verbleibt.Due to the arrangement of the NH fuses and the thermal management, the power density (Watt/cm 3 ) of the power isolating switch 1 is significantly increased compared to conventional power isolating switches. The power density indicates the maximum power loss of the fuses in relation to the device or housing volume. In one embodiment, the fuses have a power loss of up to 9 watts. Conventional devices have a power density of 0.022 watts/cm 3 . In one possible embodiment, the NH fuse switch disconnector according to the invention has a power density of 0.036 watts/cm 3 based on a maximum power loss of 3 NH fuses (corresponding to 25 watts) and a device or housing volume of the housing 2 . Circuit breaker 1 is particularly suitable for NH000 fuses. Furthermore, circuit breaker 1 can also be used for NH fuses of type NH00. In one possible embodiment, the housing 2 has the NH fuse switch disconnector 1 has a width of 49.5 mm, a height of 164 mm and a depth of 85 mm. The housing 2 of the switch-disconnector 1 is therefore relatively small compared to conventional switch-disconnector housings (conventional circuit-breakers have, for example, a width of 53 mm and a height of 200 mm). The installation space or installation space required by the load-break switch 1 according to the invention, in particular within a switch cabinet, is correspondingly small, so that more space remains for other devices or current consumers mounted on the busbars.

Durch die von unten durch die Zuführschlitze 10 zugeführte Luft werden die im montierten Zustand unten liegenden NH-Sicherungen NH1, NH2, die beispielsweise für die Phasen L1, L3 vorgesehen sind, umströmt und die Abwärme der unten liegenden NH-Sicherungen NH1, NH2 wird seitlich durch Konvektion an der darüber angeordneten NH-Sicherung NH3 vorbei nach oben durch die Abführschlitze 11, 12 aus dem Gehäuse 2 an die Umgebung abgeführt. Die erwärmte Luft kann beispielsweise zwischen dem Bedienelement 3 durch die Abführschlitze 11, 12 ausströmen. Dies ist schematisch auch in Fig. 6 dargestellt. Man erkennt in Fig. 6 die Zuströmung des Kühlmediums bzw. Luft durch die Zuführschlitze 10 und das Ausströmen der durch die unteren NH-Sicherungen NH1, NH2 erwärmten Luft durch die seitlichen Abführschlitze 12 sowie durch die oberen Abführschlitze 11. Bei einer möglichen Ausführungsform sind die Zugangs- und Abgangskontakte des NH-Sicherungs-Lasttrennschalters 1 in dem wärmeleitfähigen Kontaktträger 2B eingebettet, welcher die Wärmeenergie gezielt von dem kritischen Bereich der unteren NH-Sicherungen NH1, NH2 in den Bereich der oben angeordneten dritten NH-Sicherung NH3 sowie an die obere Stirnseite des Gehäuses 2 abführt. Dort kann die Wärmeenergie durch Konvektion und/oder Strahlung an die Umgebung abgegeben werden.The air supplied from below through the feed slots 10 flows around the LV HRC fuses NH1, NH2 which are located below in the installed state and which are provided, for example, for the phases L1, L3, and the waste heat from the LV HRC fuses NH1, NH2 located below is discharged to the side discharged upwards through the discharge slots 11, 12 from the housing 2 to the environment by convection past the NH fuse NH3 arranged above. The heated air can flow out between the operating element 3 through the discharge slots 11, 12, for example. This is also shown schematically in 6 shown. One recognizes in 6 the inflow of the cooling medium or air through the supply slots 10 and the outflow of the air heated by the lower NH fuses NH1, NH2 through the lateral discharge slots 12 and through the upper discharge slots 11. In one possible embodiment, the input and output contacts of the NH -fuse switch-disconnector 1 embedded in the thermally conductive contact carrier 2B, which dissipates the thermal energy in a targeted manner from the critical area of the lower NH fuses NH1, NH2 to the area of the third NH fuse NH3 arranged at the top and to the upper end face of the housing 2. There she can Heat energy are released to the environment by convection and / or radiation.

Die im Zusammenhang mit den verschiedenen Figuren beschriebene Ausführungsform betreffen einen Lasttrennschalter 1 mit drei NH-Sicherungen. Weitere Ausführungsformen des Lasttrennschalters 1 sind möglich, bei denen mehr als drei NH-Sicherungen innerhalb des Gehäuses 2 integriert sind. Darüber hinaus sind weitere Ausführungsformen des erfindungsgemäßen Lasttrennschalters 1 möglich. Bei einer möglichen Ausführungsform ist die Bedieneinheit werkzeugsicher, beispielsweise IP30 ausgestaltet. Die Führungsbügel 3B, 3C der Bedieneinheit 3 können in einer werkzeugsicheren Bedieneinheit 3 des Gehäuses 2 geführt werden. Die Führungsbügel 3B, 3C des Betätigungsgriffes 3A der werkzeugsicheren Bedieneinheit 3 können bei einer möglichen Ausführungsform in zugehörigen Seitenteilen des Gehäuses 2 des Lasttrennschalters 1 entlang mehrerer Schutzauswölbungen geführt werden. Diese Schutzauswölbungen können bei einer möglichen Ausführungsform derart miteinander verschachtelt sein, dass kein Werkzeug in den Innenraum des Gehäuses 2 des NH-Sicherungs-Lasttrennschalters 1 einführbar ist. Bei einer möglichen Ausführungsvariante weisen die Führungsbügel 3B, 3C des Betätigungsgriffes 3A der werkzeugsicheren Bedieneinheit 3 jeweils mindestens eine S-förmige Auswölbung auf, die mindestens eine zugehörige Schutzauswölbung berührungslos umschließt.The embodiment described in connection with the various figures relate to a load-break switch 1 with three NH fuses. Further embodiments of the load-break switch 1 are possible, in which more than three NH fuses are integrated within the housing 2. In addition, further embodiments of the load-break switch 1 according to the invention are possible. In one possible embodiment, the operating unit is designed to be tool-safe, for example IP30. The guide brackets 3B, 3C of the operating unit 3 can be guided in a tool-safe operating unit 3 of the housing 2. In one possible embodiment, the guide brackets 3B, 3C of the actuating handle 3A of the tool-safe operating unit 3 can be guided in associated side parts of the housing 2 of the load-break switch 1 along several protective bulges. In one possible embodiment, these protective bulges can be nested with one another in such a way that no tool can be inserted into the interior of the housing 2 of the NH fuse switch disconnector 1 . In one possible embodiment variant, the guide brackets 3B, 3C of the actuating handle 3A of the tool-safe operating unit 3 each have at least one S-shaped bulge that encloses at least one associated protective bulge without contact.

Die in den NH-Sicherungs-Lasttrennschalter 1 einsetzbaren NH-Sicherungen sind vorzugsweise jeweils mit einer Schaltkontaktanordnung in einem Strompfad schaltbar. Die Messerkontakte der NH-Sicherungen werden dabei in zwei gegenüberliegende Sicherungskontakte, insbesondere Lyra-Kontakte, eines Sicherungskontaktpaares eingesetzt. Weitere Ausführungsvarianten des erfindungsgemäßen Lasttrennschalters 1 sind möglich. Beispielsweise können innerhalb des Gehäuses 2 des NH-Sicherungs-Lasttrennschalters 1 integrierte Lüftungskanäle vorgesehen sein, um die Abwärme und/oder Schaltgase nach oben abzuleiten. Der NH-Sicherungs-Lasttrennschalter 1 wird in vertikaler Ausrichtung auf horizontal angeordnete stromführende Schienen bzw. Stromsammelschienen montiert. Hierdurch wird eine signifikante Platzersparnis, beispielsweise innerhalb eines Schaltschrankes, erreicht.The NH fuses that can be used in the NH fuse switch-disconnector 1 can preferably each be switched in a current path with a switching contact arrangement. The blade contacts of the NH fuses are used in two opposite fuse contacts, in particular Lyra contacts, of a pair of fuse contacts. Other design variants of the load-break switch 1 according to the invention are possible. For example, integrated ventilation ducts can be provided within the housing 2 of the NH fuse switch disconnector 1 in order to dissipate the waste heat and/or switching gases upwards. The NH fuse switch disconnector 1 is mounted in a vertical orientation on horizontally arranged current-carrying rails or busbars. This achieves a significant saving in space, for example within a control cabinet.

Bei einer möglichen Ausführungsform kann der Betätigungsgriff 3A der Bedieneinheit 3 sowohl im eingeschalteten Zustand als auch im ausgeschalteten Zustand plombiert werden. Weiterhin kann der NH-Sicherungs-Lasttrennschalter 1 bei einer möglichen Ausführungsvariante eine mechanische Deckelverriegelung zur Verriegelung des Schutzdeckels aufweisen.In one possible embodiment, the actuating handle 3A of the operating unit 3 can be sealed both when it is switched on and when it is switched off. Furthermore, the NH fuse switch disconnector 1 can have a mechanical cover lock for locking the protective cover in a possible embodiment variant.

Der Sicherungs- bzw. Schutzdeckel überdeckt vorzugsweise die Schrauben 9-i der Rahmenklemmen 8-i im eingeschalteten Zustand des NH-Sicherungs-Lasttrennschalters 1, d.h. wenn sich der Betätigungsgriff 3A der Bedieneinheit 3 oben befindet. Hierdurch wird die Sicherheit für den Anwender erhöht. Bei einer möglichen Ausführungsform ist die Sichtscheibe nach oben verschiebbar, um Prüflöcher freizugeben. Die Prüflöcher erlauben dem Anwender, eine Spannungsprüfung an den NH-Sicherungen vorzunehmen.The fuse or protective cover preferably covers the screws 9-i of the box terminals 8-i when the NH fuse switch-disconnector 1 is switched on, i.e. when the actuating handle 3A of the operating unit 3 is at the top. This increases safety for the user. In one possible embodiment, the viewing pane can be moved upwards in order to release inspection holes. The test holes allow the user to carry out a voltage test on the NH fuses.

Der Kontaktträger 2B beinhaltet vorzugsweise einen wärmeleitfähigen Kunststoff. Demgegenüber ist das Unterteil 2A und der Sicherungsdeckel des Gehäuses 2 vorzugsweise aus einem wärmeisolierenden Kunststoff gebildet.The contact carrier 2B preferably contains a thermally conductive plastic. In contrast, the lower part 2A and the fuse cover of the housing 2 are preferably formed from a heat-insulating plastic.

Claims (12)

  1. NH-fuse circuit breaker (1) comprising a housing (2) for accommodating a plurality of NH fuses, said housing being orientated vertically when assembled,
    the housing (2) being configured to dissipate excess heat, generated by the NH fuses located in the housing (2), upwards out of the housing (2) into the environment by way of convection within the housing (2) past the sides of NH fuses arranged above,
    three NH fuses for protecting three current phases (L1, L2, L3) being contained in the housing (2),
    characterised
    in that a first NH fuse (NH1) and a second NH fuse (NH2) are arranged side by side within the housing (2), and a third NH fuse (NH3) positioned above is provided, excess heat generated by the first NH fuse (NH1) being passed upwards past the side of a first lateral surface of the third NH fuse (NH3), and excess heat generated by the second NH fuse (NH2) being passed upwards past the side of a second, opposite lateral surface of the third NH fuse (NH3), without heating up the third NH fuse (NH3),
    in that for each current phase (L) one or two associated plug-in contact elements (5, 6, 7) are provided on the rear face of the housing (2) of the NH-fuse circuit breaker (1) and can be plugged into corresponding contact slots of the associated live bar or of a bar adapter for the live bar, and
    in that each of the plug-in contact elements (5, 6, 7) is mechanically protected by two protective ribs arranged on either side.
  2. NH-fuse circuit breaker according to claim 1,
    wherein the NH fuses can be switched simultaneously by means of a manually actuable operating unit (3) arranged on the housing (2).
  3. NH-fuse circuit breaker according to claim 2,
    wherein the manually actuable operating unit (3), together with the housing (2), is formed tool-proof and connected to a switching mechanism for the NH fuses.
  4. NH-fuse circuit breaker according to claim 3,
    wherein the switching mechanism has a parallel or swivelling pull-out.
  5. NH-fuse circuit breaker according to claims 1 to 4,
    wherein the housing (2) of the circuit breaker (1) has, on the rear face thereof, mounting latch elements (4) for mounting the NH-fuse circuit breaker (1) on horizontally arranged live bars and contact elements (5, 6, 7) for electrically contacting the live bars.
  6. NH-fuse circuit breaker according to claim 5,
    wherein an associated NH fuse is provided in the housing (2) of the circuit breaker (1) for each current phase (L) transported via an associated busbar.
  7. NH-fuse circuit breaker according to any of preceding claims 1 to 6,
    wherein the housing (2) of the circuit breaker (1) has, on an end face, a clamping device (8) for each current phase (L) for attaching lines.
  8. NH-fuse circuit breaker according to claim 1,
    wherein the third NH-fuse (NH3) located in the housing (2) is arranged offset in the housing (2), towards the rear face of the housing (2), from the two NH fuses (NH1, NH2) arranged side by side below, excess heat generated by the two NH fuses (NH1, NH2) located side by side additionally being dissipatable at the front face of the housing (2) by free convection without heating up the third NH fuse (NH3).
  9. NH-fuse circuit breaker according to any of the preceding claims,
    wherein the housing (2) of the NH-fuse circuit breaker (1) has, in the mounted state, feed slits (10) on the lower end face thereof for feeding in a coolant and dissipation slits (11, 12) located on the upper end face and longitudinal faces thereof for dissipating the excess heat generated by the NH fuses.
  10. NH-fuse circuit breaker according to any of the preceding claims,
    wherein the operating unit (3) of the NH-fuse circuit breaker (1) has an actuation handle (3A) having two guide brackets (3B, 3C) which are connected to the switching mechanism of the NH fuses.
  11. NH-fuse circuit breaker according to any of preceding claims 1 to 10,
    wherein a fuse cover with or without viewing panes is provided on a front face of the housing (2) of the circuit breaker (1), covers the NH fuses, and can be closed both when the circuit breaker (1) is switched on and when the circuit breaker (1) is switched off.
  12. NH-fuse circuit breaker according to any of preceding claims 1 to 11,
    wherein the housing (2) of the NH-fuse circuit breaker (1) has a contact carrier (2B) containing thermally conductive plastics material.
EP18162088.1A 2018-03-15 2018-03-15 Nh-fuse load break switch Active EP3540752B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP18162088.1A EP3540752B1 (en) 2018-03-15 2018-03-15 Nh-fuse load break switch
ES18162088T ES2923297T3 (en) 2018-03-15 2018-03-15 NH Fuse Circuit Breaker
PL18162088.1T PL3540752T3 (en) 2018-03-15 2018-03-15 Nh-fuse load break switch
CN201910198934.3A CN110277289B (en) 2018-03-15 2019-03-15 NH fuse load-break switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18162088.1A EP3540752B1 (en) 2018-03-15 2018-03-15 Nh-fuse load break switch

Publications (2)

Publication Number Publication Date
EP3540752A1 EP3540752A1 (en) 2019-09-18
EP3540752B1 true EP3540752B1 (en) 2022-05-11

Family

ID=61683698

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18162088.1A Active EP3540752B1 (en) 2018-03-15 2018-03-15 Nh-fuse load break switch

Country Status (4)

Country Link
EP (1) EP3540752B1 (en)
CN (1) CN110277289B (en)
ES (1) ES2923297T3 (en)
PL (1) PL3540752T3 (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9310753U1 (en) * 1993-07-17 1993-09-30 Woehner Alfred Gmbh Securing element for busbar systems
WO1997032327A1 (en) * 1996-02-28 1997-09-04 Wermelinger Ag Fuse-switch and/or fuse-disconnector
DE50207061D1 (en) * 2001-04-20 2006-07-20 Mueller Jean Ohg Elektrotech Narrow three-pole fuse switch disconnector
DE102007043133B3 (en) * 2007-09-11 2009-04-09 Wöhner GmbH & Co. KG Elektrotechnische Systeme Switch disconnectors
JP5081581B2 (en) * 2007-10-30 2012-11-28 矢崎総業株式会社 Fusible link unit
JP5771439B2 (en) * 2011-04-27 2015-08-26 矢崎総業株式会社 Fuse circuit structure
SI2913835T1 (en) * 2014-02-26 2017-03-31 Woehner GmbH & Co. KG Electronische Systeme Safety circuit breaker strip for low-voltage high-power fuses
CN204242920U (en) * 2014-11-10 2015-04-01 上海万纳电气设备有限公司 Can the fuse disconnecting switch of phase selection deciliter
CN204315441U (en) * 2015-01-26 2015-05-06 浙江茗熔电器保护系统有限公司 Combined fuse-type isolating switch
CN205789850U (en) * 2016-02-29 2016-12-07 浙江正泰电器股份有限公司 Low-tension fuse

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Publication number Publication date
ES2923297T3 (en) 2022-09-26
EP3540752A1 (en) 2019-09-18
CN110277289A (en) 2019-09-24
PL3540752T3 (en) 2022-09-26
CN110277289B (en) 2021-05-18

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