HRP20000880A2

HRP20000880A2 - Electric current conductor for the current transformer of a low-voltage power fuse device or of a low-voltage power fuse device including a load switch

Info

Publication number: HRP20000880A2
Authority: HR
Inventors: Kurt Portschy
Original assignee: Schneider M
Priority date: 1999-12-17
Filing date: 2000-12-15
Publication date: 2001-08-31
Also published as: AT4111U1; HU0000352V0; EP1109192A2; HU2052U; EP1109192A3; CZ11256U1; PL344569A1

Description

VODIČ ELEKTRIČNE STRUJE ZA STRUJNI TRANSFORMATOR UREĐAJA NISKONAPONSKOG UČINSKOG OSIGURAČA ILI UREĐAJA NISKONAPONSKOG UČINSKOG OSIGURAČA S TERETNOM SKLOPKOM ELECTRIC CURRENT CONDUCTOR FOR CURRENT TRANSFORMER OF LOW VOLTAGE POWER FUSE DEVICE OR LOW VOLTAGE POWER FUSE DEVICE WITH LOAD SWITCH

Vodič električne struje za strujni transformator uređaja niskonaponskog učinskog osigurača ili uređaja niskonaponskog učinskog osigurača s teretnom sklopkom. Electric current conductor for the current transformer of a low-voltage power fuse device or a low-voltage power fuse device with an on-load switch.

Izum se odnosi na vodič električne struje uređaja niskonaponskog učinskog osigurača ili uređaja niskonaponskog učinskog osigurača s teretnom sklopkom s dva paralelna odsječka, od čega je jedan odsječak spojiv sa sabirnicom, a drugi odsječak s kontaktom jednog pola i s jednim središnjim dijelom koji se pruža pod pravim kutom i koji ih spaja, pri čemu su odsječci i središnji dio poredani u obliku slova "Z" i pri čemu se vodič električne struje spaja sa strujnim transformatorom, kao i kućište s takvim vodičem električne struje. The invention relates to the electrical current conductor of a low-voltage power fuse device or a low-voltage power fuse device with a load switch with two parallel sections, one section of which can be connected to the busbar, and the other section with a contact of one pole and with one central section that extends at a right angle and which connects them, wherein the sections and the central part are arranged in the shape of the letter "Z" and wherein the electric current conductor is connected to the current transformer, as well as the housing with such an electric current conductor.

Kada se standardni uređaji niskonaponskog učinskog osigurača ili uređaji niskonaponskog učinskog osigurača s teretnom sklopkom trebaju opremiti strujnim transformatorima, postavlja se problem da se oni moraju postaviti u strujnoj stazi (razvedenom strujnom putu ili strujnom krugu) od kontaktnih glava polova do sabirnica, pri čemu standardni strujni transformatori imaju primarnu jezgru koja mora opasati takav strujni krug. When standard low-voltage power fuse devices or low-voltage power fuse devices with on-load switch are to be equipped with current transformers, the problem arises that they must be placed in the current path (split current path or current circuit) from the contact heads of the poles to the busbars, whereby the standard current transformers have a primary core that must surround such a circuit.

Iz EP A 455 589 poznat je podložak za uređaj niskonaponskog učinskog osigurača ili uređaj niskonaponskog učinskog osigurača s teretnom sklopkom koji je opremljen strujnim transformatorom, a koji ima odgovarajući vodič električne struje. Središnji dio vodiča električne struje je pritom toliko skraćen, da se unutar kućišta između donjeg odsječka vodiča električne struje dodijeljenog sabirnici i same sabirnice stvara dovoljno mjesta za strujni transformator. Donji odsječak vodiča električne struje pritom se vijcima spaja sa sabirnicom na način da se vijak provodi kroz prstenastu jezgru strujnog transformatora i na taj način stvara primarni namot. Problematično kod ovog rasporeda je to što kroz vodič električne struje kod uređaja niskonaponskog učinskog osigurača ili uređaja niskonaponskog učinskog osigurača s teretnom sklopkom protječu struje do 1000 ampera i da vijak u tom smislu predstavlja slabu točku u strujnom krugu, jer vijci od električno dobro provodljivih materijala, kao što su aluminij ili bakar i njihove legure, zapravo savladaju tako visoke struje, ali zato pokazuju jedva dovoljnu mehaničku čvrstoću za vijčano spajanje vodiča električne struje sa sabirnicom. S druge strane čelični bi vijci imali potrebnu mehaničku čvrstoću, ali ne i potrebnu strujnu čvrstoću. From EP A 455 589, a support for a low-voltage power fuse device or a low-voltage power fuse device with a load switch is known, which is equipped with a current transformer, and which has a suitable electric current conductor. The central part of the electric current conductor is shortened so much that enough space for a current transformer is created inside the housing between the lower section of the electric current conductor assigned to the bus and the bus itself. At the same time, the lower section of the electric current conductor is connected to the busbar with screws in such a way that the screw is passed through the ring core of the current transformer and thus creates the primary winding. The problem with this arrangement is that currents of up to 1000 amperes flow through the conductor of the electric current in low-voltage power fuse devices or low-voltage power fuse devices with a load switch, and that the screw in this sense represents a weak point in the circuit, because screws are made of electrically conductive materials. such as aluminum or copper and their alloys, actually overcome such high currents, but that is why they show barely enough mechanical strength for the screw connection of electric current conductors to the busbar. On the other hand, steel screws would have the required mechanical strength, but not the required electrical strength.

Zadaća je ovog izuma stoga dalje razvijati vodič električne struje uvodno navedene vrste kako bi se strujni transformator mogao bez problema smjestiti u kućište, a da pritom bude zajamčena i potrebna mehanička čvrstoća i strujna čvrstoća. The task of this invention is therefore to further develop an electric current conductor of the type mentioned in the introduction so that the current transformer can be placed in the housing without any problems, while the required mechanical strength and current strength are guaranteed.

Ova se zadaća rješava putem vodiča električne struje sa svojstvima zahtjeva 1. This task is solved by means of an electric current conductor with the properties of requirement 1.

U izumu se vodič električne struje izvodi na način da središnji dio preuzima funkciju primarnog vodiča u strujnom transformatoru. Problem koji se pritom javlja jest taj da se strujni transformator mora postaviti oko tog središnjeg dijela, a da se pritom po mogućnosti ne moraju mijenjati standardizirane mjere gornjeg i donjeg odsječka vodiča električne struje, te se stoga vodič električne struje izvodi se najmanje u dva dijela, pri čemu je jedan odsječak, po mogućnosti odsječak dodijeljen sabirnici, spojen sa središnjim dijelom putem otpojivog spoja. In the invention, the electric current conductor is designed in such a way that the central part assumes the function of the primary conductor in the current transformer. The problem that arises is that the current transformer must be placed around this central part, without having to change the standardized measurements of the upper and lower sections of the electric current conductor, if possible, and therefore the electric current conductor is made in at least two parts, wherein one section, preferably the section assigned to the busbar, is connected to the central section by means of a detachable connection.

Načelno se može zamisliti da se odsječak neotpojivo spoji sa središnjim dijelom, npr. da se zalemi i da se u slučaju kvara na strujnom transformatoru zamjenjuje zajedno s vodičem električne struje. Preferira se, dakako, rješenje otpojivog spoja odsječka i središnjeg dijela, npr. vijčani spoj, jer se tada u slučaju kvara izmjenjuje samo strujni transformator, što je nešto povoljnija varijanta u pogledu troškova. In principle, it is possible to imagine that the section is permanently connected to the central part, for example, that it is soldered and that, in the event of a current transformer failure, it is replaced together with the electric current conductor. Of course, the solution of a detachable connection of the section and the central part, eg a screw connection, is preferred, because then in the event of a failure, only the current transformer is replaced, which is a slightly more favorable option in terms of costs.

Sa električarskog stajališta, cilindrična izvedba središnjeg dijela predstavlja najbolji oblik izvedbe, pri čemu se preferira daje središnji dio puni cilindar. Moguća su i odstupanja od cilindričnog oblika, odnosno od oblika punog cilindra, a da se pritom ne napušta okvir postojećeg izuma, ukoliko se to iz konstrukcijskih razloga u pojedinačnim slučajevima čini svrsishodnim. From the electrician's point of view, the cylindrical design of the central part represents the best form of design, whereby it is preferred that the central part be a full cylinder. Deviations from the cylindrical shape, i.e. from the shape of a solid cylinder, are also possible, without leaving the framework of the existing invention, if this seems expedient for construction reasons in individual cases.

Predmet izuma je nadalje kućište sa svojstvima zahtjeva 8. The subject of the invention is furthermore a housing with the properties of claim 8.

Središnji dio pritom ima duljinu koja odgovara visini H kućišta odnosno otvoru u kućištu u kojem je smješten vodič električne struje sa strujnim transformatorom. At the same time, the central part has a length that corresponds to the height H of the housing, i.e. the opening in the housing in which the electric current conductor with the current transformer is placed.

U alternativnom obliku izvedbe, kod kojeg jedan odsječak vodiča električne struje ima prema središnjem dijelu savijeni krak, zbroj duljina savijenog kraka i središnjeg dijela daje iznos koji odgovara visini H kućišta odnosno otvoru u kućištu. Na taj je način moguće integrirati strujni transformator u kućište, a da se pritom ne mora mijenjati standardizirana visina H kućišta. In an alternative form of execution, where one section of the electric current conductor has a leg bent toward the central part, the sum of the lengths of the bent leg and the central part gives an amount that corresponds to the height H of the housing, i.e. the opening in the housing. In this way, it is possible to integrate the current transformer into the housing, without having to change the standardized height H of the housing.

Daljnja svojstva i prednosti izuma proizlaze iz sljedećeg opisa primjera izvedbe izuma s priloženim nacrtima. Prikazano je sljedeće: slika 1. odsječak kućišta uređaja niskonaponskog učinskog osigurača ili uređaja niskonaponskog učinskog osigurača s teretnom sklopkom gledan iskosa, slika 2. presjek kućišta u području vodiča električne struje, slika 3. vodič električne struje sa strujnim transformatorom u spoju sa sabirnicom, slika 4. prikaz koji odgovara slici 3. ali bez strujnog transformatora, slika 5. nacrt vodiča električne struje sa strujnim transformatorom, i slika 6. nacrt (bokocrt u koordinatnom sustavu) strujnog transformatora iz slike 5. Further properties and advantages of the invention emerge from the following description of an exemplary embodiment of the invention with attached drawings. The following is shown: figure 1. section of the housing of a low-voltage power fuse device or a low-voltage power fuse device with a load switch viewed from an angle, figure 2. cross-section of the housing in the area of the electric current conductor, image 3. electric current conductor with a current transformer in connection with the busbar, image 4. a view corresponding to figure 3 but without a current transformer, figure 5. a drawing of an electric current conductor with a current transformer, and figure 6. a drawing (side view in the coordinate system) of the current transformer from figure 5.

Na slici 1. prikazanje dio kućišta 1 gledan iskosa, kod kojeg je izbijena bočna stijenka u području vodiča električne struje 2 odnosno sabirnice 3. Vodič električne struje 2, smješten u otvoru 4 u kućištu 1, postavljen je u obliku slova "Z", kako je to najbolje vidljivo na slikama 3. do 6., i sastoji se poglavito od jednog gornjeg odsječka 5, jednog paralelno postavljenog donjeg odsječka 6 i jednog središnjeg dijela 7, koji međusobno spaja gornji odsječak 5 i donji odsječak 6. Figure 1 shows a part of the housing 1 viewed from an angle, where the side wall has been knocked out in the area of the electric current conductor 2, i.e. the busbar 3. The electric current conductor 2, located in the opening 4 in the housing 1, is placed in the shape of the letter "Z", as it is best visible in pictures 3 to 6, and consists mainly of one upper section 5, one parallel lower section 6 and one central part 7, which connects the upper section 5 and the lower section 6 to each other.

Središnji dio 7 je puni cilindar koji na svojoj čeonoj strani okrenutoj donjem odsječku 6 ima dva navojna provrta, kojima su na donjem odsječku 6 pridružena dva upuštena provrta 9. Donji odsječak 6 može se time čvrsto vijčano spojiti sa središnjim dijelom 7 pomoću dva vijka 10, tako da se stvori prešani spoj između središnjeg dijela 7 i donjeg odsječka 6, prikladan i za visoke struje. The central part 7 is a solid cylinder, which on its front side facing the lower section 6 has two threaded holes, to which two countersunk holes 9 are connected on the lower section 6. The lower section 6 can thus be tightly screwed together with the central part 7 by means of two screws 10, so as to create a pressed connection between the central part 7 and the lower section 6, suitable also for high currents.

Gornji odsječak 5 ima krak 11 savijen prema središnjem dijelu 7, a kraj 12 kraka 11 ulazi u prorez 13 središnjeg dijela 7. Za čvrsto spajanje kraka 11 sa središnjim dijelom 7 oni se zajedno zalemljuju na bridovima 13. The upper section 5 has an arm 11 bent towards the central part 7, and the end 12 of the arm 11 enters the slot 13 of the central part 7. To firmly connect the arm 11 to the central part 7, they are soldered together on the edges 13.

Kućište 1, kao što je vidljivo na slici 2., ima visinu H, a središnji dio 7 i krak 11, koji predstavlja produžetak središnjeg dijela 7, zajedno imaju duljinu koja odgovara visini H kućišta 1 i poglavito otvora 4. The housing 1, as can be seen in Figure 2, has a height H, and the central part 7 and the arm 11, which is an extension of the central part 7, together have a length corresponding to the height H of the housing 1 and mainly the opening 4.

Moguće je, dakako, zamisliti i da sam središnji dio 7 ima duljinu koja odgovara visini H, te daje izravno spojen s gornjim odsječkom 5. It is, of course, possible to imagine that the central part 7 itself has a length that corresponds to the height H, and is directly connected to the upper section 5.

Odsječci 5 i 6 imaju oblik poprečnog presjeka kakav je uobičajen za vodiče električne struje uređaja niskonaponskog učinskog osigurača ili uređaja niskonaponskog učinskog osigurača s teretnom sklopkom. Radi suženih prostornih mogućnosti u otvoru 4 kućišta 1 potrebno je u svakom slučaju upotrebljavati što je moguće manje strujne transformatore 14, kakvi su prikazani na slikama 1., 3., 5. i 6. Promjer provrta prstenaste jezgre strujnog transformatora 14 bit će stoga uobičajeno manji od širine vodiča električne struje 2, tako da i središnji dio 7 mora imati odgovarajuće manji promjer od širine vodiča električne struje. Kako uz visinu središnjeg dijela 7, koja odgovara visini strujnog transformatora 14. kraj 12 kraka 11 koji je utaknut u središnji dio 7 ne bio predstavljao nikakvu zapreku, širina ovog kraja 12 stoga ne smije biti veća od promjera središnjeg dijela 7. Da bi se izbjeglo ovaj problem, visina središnjeg dijela 7 može biti veća od visine strujnog transformatora 14 za onoliko koliko iznosi kraj 12 utaknut u središnji dio 7. Sections 5 and 6 have a cross-sectional shape as is usual for the electric current conductors of a low-voltage power fuse device or a low-voltage power fuse device with a load switch. Due to the narrowed spatial possibilities in the opening 4 of the housing 1, it is necessary in any case to use the smallest possible current transformers 14, as shown in Figures 1, 3, 5 and 6. The diameter of the bore of the annular core of the current transformer 14 will therefore be usual smaller than the width of the electric current conductor 2, so that the central part 7 must have a correspondingly smaller diameter than the width of the electric current conductor. As with the height of the central part 7, which corresponds to the height of the current transformer 14, the end 12 of the arm 11, which was inserted into the central part 7, did not represent any obstacle, the width of this end 12 must therefore not be greater than the diameter of the central part 7. In order to avoid this problem, the height of the central part 7 can be greater than the height of the current transformer 14 by the amount of the end 12 inserted into the central part 7.

Kako je vidljivo na slikama, donji odsječak 6 nadalje je spojen sa sabirnicom 3 vijkom 15. pri čemu se taj spoj može izvesti na standardan način. As can be seen in the pictures, the lower section 6 is further connected to the bus 3 with a screw 15, whereby this connection can be made in a standard way.

Također na standardan način spojen je i gornji odsječak 5 vodiča električne struje 2 s kontaktnom glavom 16, koja prihvaća jedan kontaktni nož, primjerice, osigurača. Drugi kontaktni nož osigurača prihvaća kontaktna glava 17, vidljiva na slici 1. bez pripadajućeg vodiča električne struje. Also in a standard way, the upper section 5 of the electric current conductor 2 is connected to the contact head 16, which accepts one contact blade, for example, of a fuse. The second contact blade of the fuse is accepted by the contact head 17, visible in Figure 1. without the associated electric current conductor.

Claims

1. Vodič električne struje uređaja niskonaponskog učinskog osigurača ili uređaja niskonaponskog učinskog osigurača s teretnom sklopkom s dva paralelna odsječka (5, 6), od čega je jedan odsječak (6) spojiv sa sabirnicom (3), a drugi odsječak (5) s kontaktom (16) jednog pola i s jednim središnjim dijelom (7) koji se pruža pod pravim kutom i koji ih spaja, pri čemu su odsječci (5, 6) i središnji dio (7) poredani u obliku slova "Z", i pri čemu se vodič električne struje (2) spaja sa strujnim transformatorom (14), naznačeno time daje središnji dio (7) pridružen strujnom transformatoru (14) i da ima cilindrični presjek te da je najmanje jedan od oba odsječka (6) spojen sa središnjim dijelom (7), po mogućnosti otpojivim spojem.1. Electric current conductor of a low-voltage power fuse device or a low-voltage power fuse device with a load switch with two parallel sections (5, 6), of which one section (6) can be connected to the busbar (3) and the other section (5) to a contact (16) of one pole and with one central part (7) extending at a right angle and connecting them, wherein the sections (5, 6) and the central part (7) are arranged in the shape of the letter "Z", and the electric current conductor (2) is connected to the current transformer (14), indicated by the fact that the central part (7) attached to the current transformer (14) has a cylindrical section and that at least one of the two sections (6) is connected to the central part (7) ), preferably with a detachable connection.

2. Vodič električne struje prema zahtjevu 1, naznačeno time daje središnji dio (7) puni cilindar.2. Electric current conductor according to claim 1, characterized in that the central part (7) fills the cylinder.

3. Vodič električne struje prema zahtjevima 1 ili 2, naznačeno time da je središnji dio (7) vijčano spojen s jednim odsječkom (6).3. Conductor of electric current according to claims 1 or 2, characterized in that the central part (7) is screw-connected to one section (6).

4. Vodič električne struje prema jednom od zahtjeva 1 do 3, naznačeno time da je jedan odsječak (5) zavaren ili zalemljen sa središnjim dijelom (7).4. Electric current conductor according to one of claims 1 to 3, characterized in that one section (5) is welded or soldered to the central part (7).

5. Vodič električne struje prema jednom od zahtjeva 1 do 4, naznačeno time da jedan odsječak (5) ima krak (11) savijen prema središnjem dijelu (7), koji je spojen sa središnjim dijelom (7), po mogućnosti smješten u prorez (13) na jednoj čeonoj površini središnjeg dijela (7) i s njime zavaren ili zalemljen.5. Electric current conductor according to one of claims 1 to 4, characterized in that one section (5) has an arm (11) bent towards the central part (7), which is connected to the central part (7), preferably located in a slot ( 13) on one front surface of the central part (7) and welded or soldered to it.

6. Vodič električne struje prema jednom od zahtjeva 1 do 5, naznačeno time daje širina odsječaka (5, 6) veća od promjera središnjeg dijela (7).6. Electric current conductor according to one of claims 1 to 5, characterized in that the width of the sections (5, 6) is greater than the diameter of the central part (7).

7. Vodič električne struje prema zahtjevu 5 i 6, naznačeno time da krak (11) gornjeg odsječka (5), smješten u prorezu (13) središnjeg dijela (7), u području u kojem je smješten u prorez (13) nije širi od promjera središnjeg dijela (7).7. Conductor of electric current according to claims 5 and 6, characterized by the fact that the arm (11) of the upper section (5), placed in the slot (13) of the central part (7), in the area where it is placed in the slot (13) is not wider than diameter of the central part (7).

8. Kućište uređaja niskonaponskog učinskog osigurača s teretnom sklopkom s polovima uređaja teretne sklopke odgovarajućim brojem otvora (4) visine H, unutar kojih su smješteni vodič električne struje (2) i strujni transformator (14), naznačeno vodičem električne struje (2) prema jednom od zahtjeva 1 do 7.8. The housing of the device of the low-voltage power fuse with the on-load switch with the poles of the on-load switch device with the appropriate number of openings (4) of height H, inside which the electric current conductor (2) and the current transformer (14) are located, indicated by the electric current conductor (2) towards one from requirements 1 to 7.

9. Kućište prema zahtjevu 8, naznačeno time da duljina središnjeg dijela (7) odgovara visini H.9. Housing according to claim 8, characterized in that the length of the central part (7) corresponds to the height H.

10. Kućište prema zahtjevu 8, naznačeno time da zbroj duljina središnjeg dijela (7) i kraka (11) odgovara visini H.10. Housing according to claim 8, characterized in that the sum of the lengths of the central part (7) and the arm (11) corresponds to the height H.