HUE025237T2 - NH safety circuit breaker with converter - Google Patents

Description

MN fi#® swtoto dlseoepectpr hpi| a current tfansfermer

The present invention relates: to NH fuse swit#: disconnectors or NH fuse switches having a hoping with a bottom surface and: .at teasí one supply contact, which protrudes nom the bof-tom surface,

Low-voifage high-breaking {NH1 fuse switch disconnectors or NH fuse Switches have been known far a long time end serve to provide fused outlets: of busbars, which can be totobtp-neoted under load, to general, the devices comprise one or more fuse bases, which are ar-ranged in the bousing. Corresponding fuse inserts are mounted to a shit coven eu# that when the shit cover is closed the fuse Inserts are mounted info the fusé bases and a connection between each of the supply contacts - which can be connected to the busbars - and the cutlet contacts Is esfahllshed. When opening tie shift cover, the fuse inserts arc pulled out of the fuse hasesysuch that the conne#on Is interrupted.

In general, the present invention can also be used for open distributors, wherein the: fuse Inserts can be pulled out of the open bousing ty means of a suitable tool. Therefore, the farm NH fuse switches are supposed to also include open distributors. öffah,: a large number of these NH fuse switches is mounted new to each other in so-called oonfrei cabinets. Thereby if is often requested, Inter alia because of touch protection, that in gerierafall assemblies diese flush in the installation depth,

Nor some application purposes, measurement of the current fie# via the provided outlet Is desired. Therefore, usually current transformers are used. Current: transformers work like transformers, i.e. an slemaftng current Hewing through the outlet connection fphmory conductor) induces a secondary current provided by the current transformer, which is electrically Isolated: from the primary circuit in a secondary conductor, wherein the secondary current can be evaluated for measuring the primary current, thus, the measurement is conducted contact-free, i,e. the secondary conductor is arranged to surround the connection lino be* tween: the current busbar and: the picket contact.

For oaample,, plug-on current transformers ate known, which comprise a primary conductor ffor example in torm of m electrically conductive cylinder part) and a secondary conductor surrounding the primary conduoton The current transformer Is mounted onto the supply corfo « tact,, such that the primary1 conductor1 contacts the supply ccntaot and: the.primary conductor : of the oirrartt· transformer mcelves the cmmni flowing through toe supply comae!.. f ypioaiqn these current transformers ha» a thíchoees M between 38 sno 5# fhh*· btoP© they ere directly mounted; onto the supply contacts, this means that the entire Met fuse eveten dssceo-if#' is eerrespehd:ih§iy higher, such that a NH: fuse switod disconnecter conposmg: a eurent transformer protrudes th the centre!; cabinet from a NH: tusa ewfech disconnector net: comprising a current transformer in order to sift achieve & close flush of adjacent Nfi fuse fototch disconnectors.: so-oatieo durnmy transformer are already occasionally used. which do not comprise a secondary conductor, the thickness of which, however, corresponds to the thickness of the used ourrent transformers, such that the adiaceht devices are also: highen This method, however to quite expensive;, since the dummy transformer requires a primary conductor. toe, A fuse hase having; a; housing: has already been: known; from PE 98 CIS 18ti wherein when required the supply contact can be fogtaced by a supply contact, which is recessed m &m~ pared to the bottom surface, such; that a current transformer element can at least partially fee Included In the bottom surface of the housing, By this, use of dummy current tasformsts Is avoided, However, mounting of the curroht transformers; Is very ttoiemonsumifig, since the supply contact of the m mm.miiás disconnector has to be reelaced. Further to this case the current transformers are also expansive to produce, stops the current transformer comprises a primary conductor, f heieiqrs. In IP 1 109:182 A2ä a supply cemaet is suggested, the middle secion of which is designed; as: a Mi cylinder. This full cylinder Is Intended to work as primary oenduefof for a current: transformer:. 11m method leads to a decrease ef the costs for the current transformer, however it requires particularly shaped supply contacts, which further have to be shaped in multi-piece: form:, ip order to allow the positioning of the; current transformer.

Further, in ÛE 10:0 82 688 m empodiment: of :a: NH fuse switch is shown, wherein whop re-pulred a current: transformer having a slot-like: opening can be threaded to the Z-shaped sup-ply contact In order to allow such threading;, foe pöttöm side of the housing, however, has to be conducted; in an open form, which is not always compatible with the strict requirements concerning the touch prof action. OE-C-10082644 discloses a NH fuse switch disconnecter according to the subject-matter of claim;! k$ known current; transformer systems hava In common thai the connection of the secondary conductor to corresponding evaluation devices is ÈmMemmë, since every current transformer has to he connected by means of two connection cables and atthe same time a gltörtÄtuit-proof laytng.tt:asi$ fee emured

Starting; from the prior art described above, it Is therefore the object of the present invention to provide NH fuse switch disconnectors of the type described before, which allow to Include ourreri transformer without having to change the construction height, wherein the device Is supposed to he designed In such a way that current transformers without having their own primary current can he used.

According to the invention, this object is solved by arranging at teást one fixing element spaced apart from the supply contact at the bottom surface protruding bom the same, wherein the fixing element is designed in such a way that it comprises at least one contact surface for contacting a current transíonpar, which; surrounds the supply contact.

Thus, when required, a current transformer having a conespendlngiy designed passage opening can; he mounted to the supply contact in such a way that it fits closely with the fixing element. Thereby if Is ensured that the current transformer is optimally adjusted with; respect to the supply contact in: order to allow precise measurement of the primary current Thereby, the current tmnstormer is preferably chosen in such a way that its thldmess substantially corresponds to the height with Which the supply contact protrudes from the bottom surface, such that the NH fuse switch disconnector when mounting a current transformer is not higher. Therefore,, if ip not necessary to provide adjacent NH fuse switch disconnectors; with a dummy transformer.

Basically, it Is also; Imaginable that the contact surface is used only for pre-positioning of the current transformer, however, the current transformer dees not touch the contact surface In Its end position anymore.

In: a partlculariy preferred embodiment at least two fixing elements are provided, which each comprise at issei one contact surface for a current trsnsfbmmr.

Thereby, it is in general possible that both fixing elements provide a contact surfaeeTof the same hunért transformer, whereby a particularly exact positioning of the current transformer relative to the sopply contact Is possible. Alternatively, the fixing elements can also he provided for fixing: of two current transformer elements. Further, a fixing element can also pro- vida a: plural^ of contact surfaces, which ere intended for connecting of a plurality of surret transformer elements, ln a further particularly preferred embodiment, if is intended feat fee twoIA| elements are connected via at feast ana, preferably two connecting wafts which ara arranged substantially perpendicular an fee bottom: surface, These connecting waifs provide a lateral touch profee-tldn. fee supply contact Is surrounded fer πκΐΡ9 elements and the two connecting: wails whan using two connecting waifs connecting the two: fixing elarnonts, The current transformer can then, for example, he Inserted into the space formed by the fixing éléments pad the two connecting walls, such that the supply contact protrudes the passage opening of fee current transformer.

In an aifefeative empodiment, fee connecting wells are connected to fee bottom surface aobfer the fixing elements by means of predetermined breaking points, such that the connecting walls can he removed when a current trahÄmier is supposed to ha included. This method ai lows to configure the currant transformer in a width which is greater fears the space between the two connecting wails, & lateral' touch protection by means of the connecting walls is hot necessary for mounted current transformers anymore, since the current trshs~ tonner |seif takes over the function as touch protection.

In a further particularly preferred embodiment. It is Intended that fee fixing element is an-ranged approximately In the canter of the feetfem surface In the transverse direction and fee extension of the fixing element is preferably smaller In fee transverse direction than the extension of the hoiem surface In the transverse direction. 8y this method, a hind of base Is formed at jfe@.»fehgiudioai eagges Of te:bete surface, which allows mounting of the NH fesd switch disconnectors In close proximity to the fixing elements for the busbar, which protrudes In general from the busbar.

In a further preferred embodiment, fee fixing element comprises a fixing device at ode If Its side walls which are substantially perpendicular to the bottom surface. Wih other words, the fixing element net only serves as contact but also for fixing fee whole current transformer to the fid fesa switch disconnector.. The: fixing device can, for example, be fhm-ed by a sub' stanilalty T-shaped groove, in which a heed boh. which Is fixed do the current transformer, can be inserted for fixing. In general, air sorts ol fixing devices are possible.

The ê&mém k pï&mMm m Ä a way that 1 pgtruèes approximately the same tarn: the bottom surface sis the supply contact at bast ene current transformer element having a «erteil passage opening is provided, wherein the current trahefsrmar eleieaM is arranged « such a way thaithe supply contact is at least partially arranged within the central opening. For example, the supply con» tael can: substantially he Z-shaped, wherein the central passage opening Is dimensioned in such a way that the cross-sectional area of the central passage opening corresponds approximately to the surface of an arm of the supply contact- This has the advantage that the curmnl transformer element does not have to he threaded to the eupply contact in a time-consuming manner:, hut carr be silded over the supply contact.

Preferably, the current transformer Is of a length In the transverse direction which corresponds substantially to the: extension of the bottom surf ace m the transverse dlrecfsen.

In a preferred: embodiment, the current transformer is substantially rectangular, wherein a side sutface of the current transform# is connected te a side surfai of the fixing element, wherein p^teebly the; connection is effected: by means of a plug connection, for example by means of a dovetail )oint, ih a particularly preferred embodiment, the current transformer element comprises at least two secondary conductors end at least two passage openings, which each are surrounded by a. secondary conductor. Basically, the current transformer element consists of: a plurality of current: transformers, which can he operated independently, which each interact witn: a sup» ply contact Therefore, by means of such a current transformer element the currents of a plurality of supply contacts fond thereby of a plurality of phasesl ban be controlled in parallel.

Preferably, the: current transformer element comprises if leas! end further opening for receiving a fixing element. Therefore, the eumfoi transformer element is designed in such a way it comprises openings in which the thong erement enters and in that it comprises openings in Which the supply contacts mtm. that the transformer element surrounds: foe ? lug element as well as the supply contact, in a preferred embodiment, the currenthansformer element has a thickness, which pome-spends approximately t# the height of the supply contact. As a resup or tnis, the transformer element laterally completely covers the supply contact and: thus provider a high: touch Prolee- : flórt ín a psrtleuiarly prefempci embodiment on one iront end ©f the minent transformer element connections tor the secondary oondoctor -are arranged or passed through *n order to allow the stfoeeq^ntoormeebon.

Further advantages, features and: application possibilities: of the present invention are reflected m the following description of preferred embodiments as well ee the corresponding ilpms.

Figure 1 shows a particularly preferred embodiment of the NH fuse switch disconnector according to: the invention,

Figure d shows a detail enlariernent ofligure 2S

Figure 3 shows a perspective view of the embodiment: of figure: 1 with detaohed connecting walls,

Figure 4 shows a perspective view according to figure 3 with current transformer element, Figure 3 shows a view: similar to figure 4 with moihi&É

Figure 6 shows a perspective view according to the embodiment, of figure 1 with an alternative embodiment of a current transformer élément,

Figure ? shews a further perspective view of the embodiment of figure i, and Figure b shows a perspective view of the embodiment: of figure 8, wherein the carrent: transformer is fixed to the device,

In figure i, an embodiment of a NH fuse swifeh aooording to the invention is shown. The NH fuse switch 1 comprises a housing 2 having a bottom surface 3. Three supply contacts 4 and a shifter S can be seen. The supply contacts 4 are Z-shaped, wherein the arm which can be seen in figure % comprises a through bore, which: serves for fixing the supply icpntacts 4 to a busbar by means of fixing: screws: (net shown). Alternatively, also contact hboffo (not shown) sen be mounted at the: Supply contacts: 4, Which themselves are then lotended for connecting: Witt: thi bbsbsra «rähoä «ng.

Fuse bases are arranged: in the housing 2, which each absorb a fuse Insert, such that the load switch device 3 provides fuse: outlets: of three busbars, if the shifter b is actuated:, the fuse inserts are drawn horn the fuse bases, such that the curmnf flow Is interrupted.

The supply contacts: 4 protrude tom the bottom: surface 3 of the housing 2. Further, fixing elements 6,1. § are arranged on the bottom: surfeoe 3, which also protrude from the bottom surface t Adjacent flying elements 6,7, 3 are connected by means of connecting wails 9, As can especially be seen in the detail enlargement of figure 2, the connecting walls § are con-necied to the fixing elements 8, I, S and the bottom surface 3 by means of predetermined breaMng; points 10.

The NH fyee switohdlseenneoter 1 can be used for the conjurations shewn In figures 1 end 2, However, a measurement of the current branched of via the supply contacts 4 cannot he earned eut,

One die see that the supply contacts 4, the fixing: elements 6; ?* g and the connecting walls 9 sylatantialiy extend from the bottom surface & to the seme extent, such that when the supply contacts 4 are mounted to busbars, the connecting wate 9 together with: the fixing *)*> 7, fipwtde a faterel tou#* piMebtoi

The fixing elements 61: 7, 8 are arranged in transverse dlrectibn on the bottom surface 3, le, In a direcldn perpendicular to the connecting: line ofdhe supply contacts fhe so-palled lodge tydinal direction^ substantially in the career, such that at the longitudinal edge of the housing remains a graded base 15,

In case the current transformer is supposed to be used for measuring the current: flowing through the supply contact,: the connecting: wells 8 can be. brobeh at the pfedeiemtlned breaking: peints 10; such that the situation shown In figure Snresuits,

Then a current transformer element I t, as shown in figure 4. can be inserted between the fxlag elements 6, 7, S, The current transformer element 11 cempises a central passage opening 12, the cross-sectional surface of whloh approximately opresponds to the I-sheped angled surfai 13 of the supply contact 4, such: that the current trahsfbtmer 11 can be sided over the supply contact 4, such that the situation shown In figure § results. One can eeefha! the current transformer il composes a connection protrusion, having; a Twhaped eross-sectlon, at a front end facing the fixing element 7, wherein the connection protrusion engages intp corresponding grooves which are arranged in the fixing elemen! 7,

Pm further sfaplxmg, the current transformer 11 comprises a recess IS at Its end not facing the fixing element 14. The fixing element 8 comprises a protruding flap 1? which oortesponds to the recess 16, wherein the flap 17 engages the current transformer If mounted to the supply contact 4 In the correspcnding; recess 18, such that the current transformer 11 is held securely, in the section of the pretrualen 14 having a T-shaped cross-section, a pod opening

If is provided by means of which the secondary conductor fne! shown) arrangé so the cub rent transformer 11 can he contacted â current transformer 11 is ©ten used only' át a; feed supply 4Jn this case. only the connect' Ing wails Θ. which are ab|apeni to tie respective supply contact: 4, are broken. Of course it Is also possible to: provide, all supply contacts 4 with a current transformer Tl, wherein then all connecting; walls S have ip he removed.

In ngure o. an alternative ernhodlmenf of a current transformer if is shewn. This embodiment of the current transformer IT comprises in total three centrât passage ppeolnge 12, which are intended to receive the supply centals 4. Further, passe§d openings 10, :10 are provided, which serve for receiving the fiklng elements |i. 7, 8,

The current transformer element IT comprises at its one end a recess IB,/wNich eomm spends to the respective recess of the first embodiment of the current trensformer element 11, as well as a fixing protrusion 14 having a T-shaped cress-sectlom which, however, is arranged within a recess 20. The current transformer element I T composes at least, one secondary conductor foot shown), which Is coupled to a passage opening 12,

The: other passage bpehiogs 1.2; ä be designed without secondary conductor. However, it Is also possible that each passage opening 12 comprises its own; secondary conductor:, such that the: eueren! low can: be captured by an three supply contacts 4 Py means of the current transformer element 11" M the tdnt and of the current transformer element: IT,: a contact female 21Is provided1, which provides corresponding contact ebhneetibns with alt secondary conductors. ..

The current transformer element I T can be mounted to the bottom surface,: such that the situation shown in figure d results, I one comparée the NB fuse switch disconnector without;® current transformer element as shown1 in: figure t with: the MB fuse; switch disconnector comprising a current transformer : element; as shown On figure Spit becomes apparent that by using the current transformer element the height of me MB fuse switch disconnector remains the same, such that ;NH fuse switch disconnectors with and without current transformer element IT can be arranged next to each other Indhe control cabinet and the shift covers are arranged substantially close Hush myá-Vó ó$t#f if* fh#-"pstaifetten dopth.

Claims (2)

MM> Mæl0Âêfe ££ êfce &amp; staged âramâMIaMlêva! Patented mêmvnmilùk '1, IH-bsKtosItóbetétes wmkmmïê | 1 | * in which the top of the bottom (3) is the house of the brother. (2). as well. at least one feed contact | 4) vm "which extends from the feililte. mmI Jnfcm, looking at at least one firing element of the bottom surface (6, f, 3, in the manner of breaking out of the bobbin lining, entraining the jet of the feeder), 2, &amp; z according to claim 1, characterized in that the fastening element is formed in such a way that at least © §y ntfcdadlelill has p2 | a transducer of the inlet contactor transformer fii), and at least preferably at least one of its junctions. there are at least one, at least one, for a price-changer: ttkösöfelnets, 3, A 2. Demand thousandths, mm1 je! $ vm - soft soft two at least one, preferably buck, essence penhole perpendicular it is connected by an ejector wall (9) arranged in the wedge. The splitter according to claim 3, characterized in that two connection walls 1 1 to 1 are formed to connect the retaining means and the feed contact is provided by the adjusting elements and a. a wall connecting the aet 5, The separator according to claim 3 or 4, i.e., the jet wall, the connecting walls with the bottom surface and the slit with the slats. they are connected by means of forced pressure points 110}, so that the Connecting Walls can be removed when a current transformer is inserted. §. Separator according to any one of claims I to A, "meat jeMeW« * "» that the stem is located in the center of the bulb, and preferably: the extension of the rbgzftd element is transversely smaller; transversely, 7. M 1-6. Separator according to one of Claims 1 to 3, characterized in that the locking element is one of its side walls which are substantially perpendicular to: a: febe: main! It has. 8. The | -7. A separator according to claims 1 to 3, characterized by the fact that the rogltoeier and the feed contact are about. Claims 1 to B * are a separator according to any one of the above, wherein at least one current transformer has a central recess and the current transformer is in such a manner. arranged at least partially in the central aperture. 10, according to claim 9, characterized in that the length of the current transducer is substantially transverse to a. The size of the kereeziraiiytx of an excitement JeM :: L L The disconnector according to claim 9 or claim 10, wherein the current transducer is substantially cuboidal or; belly ba.l akii. and the side wall of the current transducer is connected to a side wall of the ratchet member coupled in pairs, preferably mimeUett is a plug-in socket connector, for example! to help a bmeketar-napospl ^ t * Ab do i.2 <A 9-11. Disconnector according to any one of claims 1 to 3, characterized by a characteristic of? the current transformer has at least two secondary wires and at least two through-openings, which are ejected by a secondary wire. 13, A separator according to claim 12, characterized in that the current transformer has at least one opening for receiving or receiving a fastening element. 14, A 9-13. Disconnector according to one of Claims 1 to 3, characterized in that the thickness of the current transformer element is about the height of the feed contact. A separator according to any one of claims 9 to 14, characterized in that there are connectors on the secondary side of the current transformer element arranged or configured for the secondary line.