CN101286413B - Straight-through current transformer convenient for measuring voltage - Google Patents
Straight-through current transformer convenient for measuring voltage Download PDFInfo
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- CN101286413B CN101286413B CN200810074348XA CN200810074348A CN101286413B CN 101286413 B CN101286413 B CN 101286413B CN 200810074348X A CN200810074348X A CN 200810074348XA CN 200810074348 A CN200810074348 A CN 200810074348A CN 101286413 B CN101286413 B CN 101286413B
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Abstract
The invention provides a feed through current transformer which can get voltage conveniently and relates to a transformer; aiming at the drawbacks of complex operation, high cost and easy electricity-theft in the existing feed through current transformer, the invention provides a feed through current transformer which can get voltage conveniently; a transformer body (1) is provided with a wiring terminal (2) of a voltage wire and a part (3) for getting the voltage which have connection relation; the part (3) for getting the voltage is arranged at one side of a feed through hole (1-1), along which the part (3) for getting the voltage can move in the radial direction. The mode for getting voltage of the invention is simple and fast and hard electricity-theft; at the same time, the connection of a stub bolt and a wire is stable, and getting voltage is precise and reliable, thereby being beneficial to promotion and application.
Description
Technical field
The present invention relates to a kind of instrument transformer.
Background technology
Now the many straight-through current transformers that use exist connection line complexity, measuring cost high efficiency low, be not easy anti-electricity-theft drawback.
Summary of the invention
At existing straight-through current transformer have complex structure, the cost-effective rate is low and be not easy anti-electricity-theft drawback, the invention provides a kind of current transformer, it is to press holding wire to be fixed on the inside of current transformer power taking, by existing current transformer is carried out the innovative design of structure, can realize conveniently taking voltage preferably and can effectively prevent the purpose of stealing.
It is realized by following scheme:
A kind of straight-through current transformer of conveniently taking voltage, it comprises the instrument transformer body with center hole, the pressure-wire binding post and the power taking pressure part that have electrical connection mutually are set on the described instrument transformer body, described power taking pressure part is arranged on a side of center hole, and the power taking pressure part can move along center hole, and directly contact with the conductor that passes described center hole, obtain voltage signal.
For the power taking pressure part, whether have the difference of insulated hull to be divided into two kinds of situations according to conductor:
For conductor outside wrap insulate skin not, can take following structure:
Described power taking pressure part is and the metallic stud of instrument transformer body by thread connection, has advantage of simple structure.
Preferably, be fixed with metal insert on the described instrument transformer body, described metal insert is electrically connected with the pressure-wire binding post; The metallic stud that has been threaded on the described metal insert, described metallic stud can radially move along center hole, has the advantage of handled easily.
More preferably, described metal insert is at least two and be arranged on the surface of instrument transformer body around center hole, is electrically connected between all metal inserts, and metallic stud all has been threaded on each metal insert.Connect a double-screw bolt on a plurality of metal inserts respectively, a plurality of double-screw bolts can make the voltage signal of collection more stable, and can better instrument transformer be fixed on conducting rod, lead or the metal row.
Carrying out relative position by lead sealing between described metallic stud and the instrument transformer body fixes.
Preferably, also comprise nut, described nut is by being threaded on the exposed cylindrical conductor that passes center hole, and the side of described nut is provided with the hole, and the hole is provided with the internal thread that matches with the double-screw bolt front end.Nut is spun on conducting rod, lead or the metal row, again double-screw bolt is screwed in the screwed hole of pane, can avoid loose bolt and influence collection voltage signal.
For conductor coated outside insulated hull, structure of taking and aforementioned structure difference are:
Described metallic stud has a spine front end, perhaps is set with the spine electric conductor at the metallic stud front end, directly contacts with the conductor wire core of inside in order to penetrate the insulated hull with insulated hull conductor.
Especially, also comprise anti-electricity-theft face shield No. one, a described anti-electricity-theft face shield is connected by non-disconnectable mode with the surface of instrument transformer body.Preferred non-disconnectable mode syndeton is: No. one anti-electricity-theft face shield is provided with card and/or shackle member, and the instrument transformer body is provided with and card and/or suitable shackle member and/or the card of shackle member.
Perhaps, also comprise anti-electricity-theft face shield No. one, No. one anti-electricity-theft face shield comprises at least two cover bodies, has between two cover bodies of annexation to connect by non-disconnectable mode; Preferably, the concrete structure between two cover bodies is:
No. one anti-electricity-theft face shield comprises a cover body and No. two cover bodies, and No. one cover body is provided with shackle member, and No. two cover body is provided with the card suitable with shackle member; Shackle member on the described cover body is inserted in No. two card on the cover body and is realized that clamping connects;
Be connected by removable mode between anti-electricity-theft face shield and the instrument transformer body; The concrete structure that preferred removable mode connects is:
All be fixed with chute and/or slide block on a described cover body and No. two cover bodies, on the described instrument transformer body 1 with the corresponding section of a cover body and No. two cover bodies, be fixed with respectively and chute and/or suitable slide block and/or the chute of slide block, the shape of cross section of described chute is up-small and down-big.
Above-mentioned anti-electricity-theft face shield of choosing any one kind of them and instrument transformer syndeton owing to can't open without destruction, therefore have better power-steeling preventing effect.
Especially, No. one anti-electricity-theft face shield is two, is fixedly installed on respectively on the surface of instrument transformer body both sides.
Preferably, be provided with anti-electricity-theft face shield No. two at the terminals place of instrument transformer body, an end of No. two anti-electricity-theft face shields is fixedlyed connected with the instrument transformer body, and the other end is provided with a cabling mouth.
More preferably, No. two anti-electricity-theft face shield comprises a cover body and No. two cover bodies, connects by non-disconnectable mode between a cover body and No. two cover bodies.The preferred version that non-disconnectable mode connects is: No. one cover body is provided with shackle member, and No. two cover body is provided with the card suitable with shackle member; Shackle member on the described cover body is inserted in No. two card on the cover body and is realized that clamping connects;
The preferred version that No. two anti-electricity-theft face shields are connected with the instrument transformer body is: the outer surface of the secondary connection end of instrument transformer body is provided with projection, be respectively arranged with on the inwall of a described cover body and No. two cover bodies and the suitable groove of projection, groove is installed on the projection.Preferably, described projection is an annular projection.
Further preferred, cabling mouth place at No. two anti-electricity-theft face shields connects bellows by the box joint, the outside dimension of the connecting portion of the internal diameter size of cabling mouth and box joint is suitable, and the connecting portion of box joint is installed in the cabling mouth and the nut by the box joint is fastenedly connected.
Perhaps, also comprise the cable that an end is electrically connected with the internal interface line end of instrument transformer body; The housing of the instrument transformer body of the insulated hull of described cable appearance and secondary connection end is cast into one.
Further, it also comprises the bellows that is sleeved on cable outside, and described bellows also is cast into one with the housing of the instrument transformer body of secondary connection end.
Straight-through current transformer of the present invention has the simple manageable advantage of circuit, and efficient is expensive low; The nut that is threaded on conducting rod can avoid being connected loosening between double-screw bolt and the conducting rod or electricity filching person is filled in insulant to the junction and influenced metering by double-screw bolt and the cooperation between the nut, has therefore avoided stealing well; Simultaneously, nut can also play instrument transformer is fixed to effect on the transformer, the instrument transformer body is fixed on the porcelain vase position of transformer conducting bar lower end, avoided electricity filching person in the instrument transformer lower end the direct lead-in wire situation of carrying out stealing; A plurality of metal inserts can be fixed on instrument transformer on the conducting rod more firmly, thus can make simultaneously be electrically connected between double-screw bolt and the conducting rod transfer overvoltage signal more better.
Anti-electricity-theft face shield each other or with the instrument transformer body between be connected by non-disconnectable mode, it can realize the optimization of anti-stealing electricity function, in case because cover body and instrument transformer fixing after, can not open by failure mode, seal the drawback that is forged easily with respect to present lead sealing mode, the method of attachment of non-disconnectable mode of the present invention can avoid electricity filching person to open cover body fully with hoodwinking people, has therefore avoided the generation of stealing situation better.
Anti-electricity-theft face shield is set No. two at the terminals place, and No. two anti-electricity-theft face shields can be avoided electricity filching person to juggle things at instrument transformer binding post place and carry out stealing.
In summary it can be seen that current transformer power taking pressure mode of the present invention is simple and direct and be not easy stealing, handling safety, it can be placed on the outer transformer conducting bar of batch meter, lead or the metal row, reduces the volume of batch meter greatly; Easy to use in the working time that can greatly save the workman, cost simple in structure is low flexibly, and simultaneously, double-screw bolt is connected stable with lead, and power taking is pressed accurately reliable, therefore is beneficial to and applies.
Description of drawings
Fig. 1 is the structure cutaway view of instrument transformer of the present invention;
Fig. 2 is the front view of instrument transformer;
Fig. 3 is the left view of Fig. 2;
Fig. 4 is embodiment 1 a described instrument transformer user mode schematic diagram;
Fig. 5 is that embodiment 1 described metallic stud 3a carries out the fixing structural representation of relative position by lead sealing 11 and instrument transformer body 1;
Fig. 6 A is embodiment 2 described instrument transformer structure cutaway views;
Fig. 6 B is embodiment 2 described instrument transformer structural representations;
Fig. 7 is the structural representation of embodiment 2 described nuts 5;
Fig. 8 is the structural representation that embodiment 2 described metallic stud 3a and nut 5 are connected;
Fig. 9 A is the embodiment 3 described instrument transformer structural representations that are provided with an anti-electricity-theft face shield 6;
Fig. 9 B is embodiment 3 described anti-electricity-theft face shields 6 and instrument transformer body 1 syndeton blast diagrammatic sketch;
Figure 10 is the syndeton schematic diagram between embodiment 3 described anti-electricity-theft face shields 6 and the instrument transformer body 1;
Figure 11 is embodiment 4 described instrument transformer bodies 1 and anti-electricity-theft face shield 6 syndeton schematic diagrames;
Figure 12 is the explosive view of embodiment 4 described instrument transformer bodies 1 and anti-electricity-theft face shield 6 syndetons;
Figure 13 is the syndeton schematic diagram of embodiment 5 described instrument transformer bodies 1 and No. two anti-electricity-theft covers 7;
Figure 14 is the explosive view of embodiment 5 described instrument transformer bodies 1 and No. two anti-electricity-theft face shield 7 syndetons;
Figure 15 is the structure cut-away view that the housing of embodiment 6 described cables and instrument transformer body 1 is cast into one;
Figure 16 is the structural representation that the housing of embodiment 6 described cables and instrument transformer body 1 is cast into one;
Figure 17 is the structure cut-away view that the embodiment 6 described bellowss 20 and the housing of instrument transformer body 1 are cast into one;
Figure 18 is that the housing of embodiment 6 described bellowss 20 and instrument transformer body 1 is cast into the unitary whole structural representation;
Figure 19 is embodiment 3 described structural representations;
Figure 20 is the structural representation of spine electric conductor.
Wherein, instrument transformer body 1, center hole 1-1, card 1-2, projection 1-3, pressure-wire binding post 2, metal insert 4, power taking pressure part 3, metallic stud 3a, spine electric conductor 3a-1, nut 5, hole 5-1, an anti-electricity-theft face shield 6, shackle member 6-1 on anti-electricity-theft face shield 6, No. two cover bodies 62 of 61, numbers anti-electricity-theft face shields 6 of a cover body of an anti-electricity-theft face shield 6, No. two anti-electricity-theft face shields 7, cabling mouth 7-1, a cover body 71 of No. two anti-electricity-theft face shields 7, shackle member 71-1 on cover body 71, the card 72-1 on 72, No. two cover bodies 72 of No. two cover bodies of No. two anti-electricity-theft face shields 7, box joint 8, connecting portion 8-1, bellows 9, metal row 10, lead sealing 11, conductor 12, transformer guide rod 15, slide block 16, chute 17, groove 18, cable 19 is sleeved on the bellows 20 of cable 19 outsides, fixed block 21, pin 22, screw 23.
Embodiment
Specify the preferred embodiment of the present invention below in conjunction with accompanying drawing.
Embodiment 1:
The described current transformer of present embodiment is mainly used in gets voltage condition to bare metal row.It comprises the instrument transformer body 1 with center hole 1-1, the pressure-wire binding post 2 and the power taking pressure part 3 that have electrical connection mutually are set on the described instrument transformer body 1, described power taking pressure part 3 is arranged on the side of center hole 1-1, and power taking pressure part 3 can move along center hole 1-1, preferred this move mode is to move radially, power taking pressure part 3 after moving directly contacts with the conductor that passes described center hole, obtains voltage signal.
The side that power taking pressure part 3 is arranged on center hole can be avoided the power taking pressure part to occupy the center hole position and influence the use of instrument transformer, simultaneously, the power taking pressure part radially moves the needs that the instrument transformer that can make this structure adapts to different inner diameters, different cross section shape bus along center hole, therefore increases the adaptability that instrument transformer uses.
Power taking pressure part 3 is arranged on a side of center hole, promptly is arranged on the instrument transformer body of center hole termination.The structure of power taking pressure part 3 with and all be a lot of along the mode that center hole moves, such as, power taking pressure part 3 can be sheet or reguline metal, follower head at it is provided with slide block, on instrument transformer body 1, chute is set, can realizes being connected and moving radially between power taking pressure part and the instrument transformer body by the slide block and the cooperation of chute.Block power taking pressure part 3 can also be connected by between spring and the instrument transformer body, can realize moving radially between itself and the instrument transformer body centre bore equally.
Preferably, described power taking pressure part 3 is metallic stud 3a, and described metallic stud 3a connects with instrument transformer body 1 by screw thread.Be understandable that the screwed hole that passes through for metallic stud 3 need be set, and the axis of this screwed hole should pass through center hole 1-1 on instrument transformer body 1.
Referring to figs. 1 through Fig. 4, be fixed with metal insert 4 on the straight-through current transformer, described metal insert 4 is electrically connected with pressure-wire binding post 2; Metallic stud 3a has been threaded on the described metal insert 4, described metallic stud 3a can radially move along center hole, like this, metallic stud 3a will arrange metal the pressure-wire binding post that voltage is delivered to instrument transformer with metal row 10 (being the punching bus) when contacting, thereby realizes the collection to voltage signal on the metal row 10.
More preferably, described metal insert 4 is two and centers on the surface that center hole 1-1 is arranged on instrument transformer body 1, be electrically connected by conductor 12 between all metal inserts 4, metallic stud 3a all has been threaded on each metal insert 4, this structure can realize a plurality of double-screw bolts and contacting that metal is arranged, thereby gathers voltage signal better.Certainly, metal insert 4 and metallic stud 3a also can have only one, have advantage simple in structure, that cost is low.It will also be appreciated that,, double-screw bolt 3a can be arranged to large-area front end,, metallic stud can be arranged to semicircular front end to adapt to cylindrical metal row's outer surface such as for cylindrical metal row in order to gather voltage signal better.
Can carry out relative position by lead sealing 11 between described metallic stud 3a and the instrument transformer body 1 fixes; with reference to Fig. 5; to avoid electricity filching person to break away from or the loosening collection that influences voltage signal to itself and metal row 10 by rotating double-screw bolt 3a; certainly in actual applications; can also take other purposes that realizes forbidding the double-screw bolt rotation as modes such as welding, rivets, also all in protection scope of the present invention.
In the present embodiment, connecting line between metal insert 4 and the pressure-wire binding post 2 is injected in the instrument transformer housing, during application, metal insert 4 can be fixed on the instrument transformer body 1 and then by lead and be connected with pressure-wire binding post 2, also can be as shown in Figure 1, metal insert 4 and conductor 12 are made integrative-structure, and the other end of conductor 12 directly connects pressure-wire binding post 2; Described conductor 12 can be processed into annular, semicircle, also can be processed into the sheet of rectangle, spill as required, the conductor 12 of laminated structure is arranged on the top of mutual inductor coil and separates the instrument transformer housing of casting outside again by insulating barrier and mutual inductor coil.Described structure has conspicuous advantage: metallic stud 3a, metal insert 4 all are arranged on the instrument transformer housing, they do not occupy the position that the instrument transformer centre bore is walked bus, thereby do not influence the coiling diameter of coil, can not influence simultaneously the use occasion of instrument transformer, simultaneously, the instrument transformer of this structure has also that the voltage signal transmission range is short, simple in structure, tie point is not easy to occur plurality of advantages such as disconnecting less.
Embodiment 2:
The described current transformer of present embodiment is mainly used in gets voltage condition to exposed transformer guide rod.If no special instructions, the described structure of present embodiment is identical with embodiment 1.
Described current transformer of present embodiment and embodiment 1 described instrument transformer difference structurally are, with reference to Fig. 6 A, Fig. 6 B, Fig. 7, Fig. 8, it also comprises nut 5, described nut 5 is by being threaded on the exposed cylindrical conductor 15 that passes center hole 1-1, the side of described nut 5 is provided with hole 5-1, and the hole is provided with the internal thread that matches with metallic stud 3a front end.
During use, at first the centre bore with instrument transformer penetrates on the transformer guide rod 15, then nut 5 is spun on the guide rod 15 of transformer, and the front end of the metallic stud 3a that will be threaded with metal insert 4 screws in the screwed hole 5-1 of nut 5 sides again.Like this, both can guarantee that instrument transformer body 1 was fixed on the guide rod 15, and avoid stealing, the while can be avoided double-screw bolt to become flexible and fill in insulating bodies between double-screw bolt 3a and guide rod 15, thereby can not influence the collection to voltage signal.
Preferably, around center hole 1-1, a metal insert 4 can be set on the instrument transformer housing, two metal inserts 4 also can be set, shown in Fig. 6 A, Fig. 6 B, also can be three, four or more a plurality of, be electrically connected between all metal inserts 4 that a double-screw bolt 3a all has been threaded on each metal insert 4.Be understandable that, the many more collections that are beneficial to more voltage signal of the number of metal insert 4, therefore, a plurality of double-screw bolt 3a are connected with nut 5 can make the voltage signal of collection more stable, and can better instrument transformer body 1 be fixed on the transformer guide rod 15.
In the foregoing description, embodiment 1 is preferably applied to that exposed metal row is carried out power taking and presses, embodiment 2 is preferably applied to that the transformer guide rod is carried out power taking and presses, but need to prove, embodiment 1 described structure can be applied to that equally the transformer guide rod is carried out power taking and press, embodiment 2 described structures can be applied to that metal row is carried out power taking and press, and can both realize purpose of the present invention.
Embodiment 3:
The described current transformer of present embodiment is mainly used in the conductor that external bread is wrapped with insulated hull and gets voltage condition.If no special instructions, the described structure of present embodiment is identical with embodiment 1.
Be that with embodiment one difference described metallic stud 3a has a spine front end, perhaps, be set with spine electric conductor 3a-1, directly contact with the conductor wire core of inside in order to the insulated hull that penetrates conductor at described metallic stud 3a front end.The metallic stud 3a front end fixedly mode of spine electric conductor can adopt as present any methods of attachment such as welding, rivet connections, as long as can guarantee the conduction between metallic stud and the spine electric conductor.The spine front end of described power taking pressure part is one group of front end with needle-like or laciniation composition; be understandable that; by having the front end that needle-like or laciniation are formed; its profile is not limit; it can be the front end that has only a point; also can form semicircular front end by the needle point or the sawtooth of different length; as Figure 19; shown in Figure 20; thereby just can contact the effect that guarantees that power taking is pressed well with round conductor; certainly can also be at the lead of different profiles and the front end outer shape of different power taking pressure parts is set; as long as can realize that the needle point of power taking pressure part or sawtooth puncture wire insulation and come power taking to press, all at the protection range of this patent.
Anti-electricity-theft cover above the instrument transformer nearly all is a case now, several instrument transformers together are placed on lead sealing then in the chest together with electric energy meter, the problem that its exists at first is, the lead sealing on the casing is as easy as rolling off a log destroyed and easily by imitated, therefore power-steeling preventing effect and bad in fact; Also have, just must open chest when the user need overhaul circuit, this just needs a lot of departments to show up, and this is unfavorable for operating in actual applications; In addition, because instrument transformer is limit by casing, for anti-electricity-theft its can only be installed in the fixed position, the user who is not suitable for the diverse location condition uses, and casing must just can hold a plurality of instrument transformers, electric energy meter and numerous lines very greatly, therefore be unfavorable for installation, wiring and management, and cost is very high.Therefore, on embodiment 1 and embodiment 2 described power taking laminated structures, the present invention also comprises anti-electricity-theft face shield, by anti-electricity-theft face shield should be used for realizing integral protection to stealing, concrete structure is with reference to following embodiment.
Embodiment 4:
Present embodiment and previous embodiment difference are, the structure of instrument transformer also comprises anti-electricity-theft face shield 6 No. one, be with the existing structure difference, the described anti-electricity-theft face shield 6 of present embodiment is connected by non-disconnectable mode with the surface of instrument transformer body 1, as can be seen, the anti-electricity-theft face shield of present embodiment is fixed on the instrument transformer body, and like this, instrument transformer just can be taken any position and use and be not limited in the chest.Be connected by non-disconnectable mode between this face shield and the instrument transformer body, that is to say, after metrological service is fixed to anti-electricity-theft face shield on the instrument transformer, just face shield can't be taken off above instrument transformer without destroying, electricity filching person just can't be hoodwinked people and be carried out stealing like this, thereby can increase the degree of protection to stealing widely.
Fig. 2 and Fig. 4 have clearly illustrated the structure of instrument transformer body 1 outer surface, on the basis of this structure, connect anti-electricity-theft face shield 6 No. one by non-disconnectable mode again, the instrument transformer structure that is provided with an anti-electricity-theft face shield 6 is shown in Fig. 9 A, and it is as a whole to be arranged on the anti-electricity-theft face shield of No. of instrument transformer body 1 one side surfaces 6.This non-disconnectable syndeton is preferably, and with reference to Fig. 9 B and Figure 10, No. one anti-electricity-theft face shield 6 is provided with card and/or shackle member 6-1, and described instrument transformer body 1 is provided with and card and/or suitable shackle member and/or the card 1-2 of shackle member 6-1.Like this, can realize that by the card and the clamping of shackle member anti-electricity-theft face shield is connected with the non-disconnectable of instrument transformer.
Described anti-electricity-theft face shield 6 and on shackle member can make of engineering plastics or transparent engineering plastics, at the instrument transformer surface of shell a plurality of card are set, because the instrument transformer housing generally all is to be made by the good plastics of toughness, therefore just can't take off without destroying after snapping onto anti-electricity-theft face shield 6 on the instrument transformer housing, and then prevented stealing, can destroy anti-electricity-theft face shield when simultaneously, metrological service need overhaul and be unlikely to destroy instrument transformer.
For as described in present embodiment, being provided with anti-electricity-theft face shield at the instrument transformer body surface, then can between double-screw bolt and instrument transformer body, lead sealing be set yet, but the fixed block 21 of tape punching can be set in the rear end of double-screw bolt, with reference to Fig. 6 B, avoid becoming flexible of double-screw bolt 3a by in the perforation of fixed block 21, inserting pin 22, can not be worn pin for limitting, can directly double-screw bolt 3a be hammered on the instrument transformer body with screw 23 by the instrument transformer body construction.
Embodiment 5:
The present embodiment difference from Example 4 is, the another kind of structure that instrument transformer body 1 and anti-electricity-theft face shield 6 are connected by non-disconnectable mode is provided.
An anti-electricity-theft face shield 6 that is positioned at instrument transformer body 1 one sides comprises two cover bodies, has between two cover bodies of annexation to connect by non-disconnectable mode, and the structure optimization that non-disconnectable mode connects is, with reference to Figure 12:
An anti-electricity-theft face shield 6 comprises that a cover body 61 and 62, numbers cover bodies 61 of No. two cover bodies are provided with shackle member 61-1, and No. two cover body 62 is provided with the suitable card 62-1 with shackle member 61-1; Shackle member 61-1 on the described cover body 61 inserts in No. two card 62-1 on the cover body and realizes that clamping connects;
Be appreciated that described shackle member 61-1 of present embodiment and card 62-1 are not limited to two of the sides shown in Figure 12, also can be set to any amount according to actual needs.Be understandable that the quantity of shackle member 61-1 and card 62-1 is many more, connect firm more.
Be connected by removable mode between anti-electricity-theft face shield 6 and the instrument transformer body 1; The structure optimization that removable mode connects is:
All be fixed with chute and/or slide block 16 on a cover body 61 and No. two cover bodies 62, on the described instrument transformer body 1 with the corresponding section of a cover body 61 and No. two cover bodies 62, be respectively equipped with slide block and/or the chute 17 suitable with chute and/or slide block 16, the shape of cross section of described chute 17 is up-small and down-big, such as swallow-tail form, inverse-T-shaped or " L " shape, certainly, this cross sectional shape is not limited to described three kinds, use needs as long as satisfy, the protection range that all belongs to this patent, described up-small and down-big structure can guarantee that a cover body 61 fixedlys connected with instrument transformer body 1 respectively with No. two cover bodies 62; In practical operation, can respectively a cover body 61 and No. two cover bodies 62 be slipped into from slide block and/or chute 17 on the instrument transformer body 1 by chute and/or slide block 16, after cover body 61 and No. two cover bodies 62 fasten, flanging all is stuck on the housing of instrument transformer body 1, further play the effect that relative motion takes place between restriction cover body and the instrument transformer body 1, and be connected to one by shackle member and card, and form non-disconnectable the connection between the instrument transformer body 1.
Embodiment 6:
Anti-electricity-theft also the needs protects the instrument transformer binding post, therefore, is that with embodiment 1-5 difference present embodiment provides a kind of structure that prevents from the instrument transformer terminals are carried out stealing.
An end that is provided with 7, No. two anti-electricity-theft face shields 7 of No. two anti-electricity-theft face shields at the terminals place of instrument transformer body 1 is fixedlyed connected with instrument transformer body 1, and the other end is provided with a cabling mouth 7-1.
Preferred structure is, with reference to Figure 13,14, described No. two anti-electricity-theft face shields 7 comprise between cover body 71 and 72, numbers cover bodies 71 of No. two cover bodies and No. two cover bodies 72 and connecting by non-disconnectable mode.Non-disconnectable mode syndeton is preferably: No. one cover body 71 is provided with shackle member 71-1, and No. two cover body 72 is provided with the suitable card 72-1 with shackle member 71-1; Shackle member 71-1 on the described cover body 71 inserts in No. two card 72-1 on the cover body and realizes that clamping connects;
No. two anti-electricity-theft face shield 7 is preferably with instrument transformer body 1 fixed connection structure: the outer surface of the secondary connection end of instrument transformer body 1 is provided with protruding 1-3, be respectively arranged with the groove 18 suitable with protruding 1-3 on the inwall of a described cover body 71 and No. two cover bodies 72, groove 18 is installed on the protruding 1-3.
More preferably, cabling mouth 7-1 place at No. two anti-electricity-theft face shields 7 is connected with bellows 9 by box joint 8, the outside dimension of the internal diameter size of cabling mouth 7-1 and the connecting portion 8-1 of box joint 8 is suitable, and the connecting portion 8-1 of box joint 8 is installed in the cabling mouth 7-1 and the nut by box joint 8 is fastenedly connected.
Embodiment 7:
Present embodiment is different with embodiment 6, and it provides the another kind of structure that prevents from the instrument transformer terminals are carried out stealing.
With reference to Figure 15, Figure 16, it comprises the cable 19 that an end is electrically connected with the internal interface line end of instrument transformer body 1; The housing of the insulated hull of described cable 19 appearances and the instrument transformer body 1 of secondary connection end is cast into one.
Preferably, with reference to Figure 17, Figure 18, it also comprises the bellows 20 that is sleeved on cable 19 outsides, and described bellows 20 also is cast into one with the housing of the instrument transformer body 1 of secondary connection end.
The insulation sheath of the described cable 19 of present embodiment and the housing of instrument transformer body 1 are cast into one, electric current contact and voltage contact all are arranged in the housing of instrument transformer body 1, replaced lead sealing, be specially adapted to determine in the engineering of cable length, can protection against the tide, waterproof, anti-electricity-theft; Have rational in infrastructure, reliable, convenient and quick construction, advantage with low cost.
Because cable is walked at the cabling mouth 7-1 place of No. two anti-electricity-theft face shields 7, in conjunction with the embodiments 5 and embodiment 6 can expect that No. two anti-electricity-theft face shields 7 and cable can be cast into one and use, and still can realize purpose of the present invention preferably; Certainly it will also be appreciated that the bellows that is sleeved on the cable outside can be cast into one with No. two anti-electricity-theft face shields 7 equally, therefore all should be in protection scope of the present invention.
Need to prove that straight-through current transformer model of the present invention does not need to limit, the structure of himself does not need to limit yet, so long as the punching instrument transformer, can be by purpose of the present invention, and promptly should be in protection scope of the present invention.In addition; above the described structure of each embodiment just exemplary illustration that the present invention did is not limited its protection range yet; those skilled in the art can do some to structure of the present invention according to the described scheme of present embodiment fully and change to realize identical purpose; for the change of doing according to scheme of the present invention so long as just available without creative work; all be considered as being equal to replacement to of the present invention, all should be within protection scope of the present invention.
Claims (14)
1. the straight-through current transformer of a conveniently taking voltage, it comprises the have center hole instrument transformer body (1) of (1-1), the pressure-wire binding post (2) and the power taking pressure part (3) that have electrical connection mutually are set on the described instrument transformer body (1), it is characterized in that described power taking pressure part (3) is arranged on a side of center hole (1-1), and power taking pressure part (3) can move along center hole (1-1), and directly contact with the conductor that passes described center hole, obtain voltage signal; Described power taking pressure part (3) is and the metallic stud (3a) of instrument transformer body (1) by thread connection; Be fixed with metal insert (4) on the described instrument transformer body (1), described metal insert (4) is electrically connected with pressure-wire binding post (2); The described metallic stud (3a) that has been threaded on the described metal insert (4), described metallic stud (3a) can radially move along center hole.
2. the straight-through current transformer of a kind of conveniently taking voltage according to claim 1, it is characterized in that described metal insert (4) is at least two and be arranged on the surface of instrument transformer body (1) around center hole (1-1), be electrically connected between all metal inserts (4), described metallic stud (3a) all has been threaded on each metal insert (4).
3. the straight-through current transformer of a kind of conveniently taking voltage according to claim 2 is characterized in that carrying out relative position by lead sealing between described metallic stud (3a) and the instrument transformer body (1) fixes.
4. the straight-through current transformer of a kind of conveniently taking voltage according to claim 2, it is characterized in that it also comprises nut (5), described nut (5) is by being threaded on the exposed cylindrical conductor that passes center hole (1-1), the side of described nut (5) is provided with hole (5-1), and described hole (5-1) is provided with the internal thread that matches with described metallic stud (3a) front end.
5. according to the straight-through current transformer of claim 1,2 or 3 described a kind of conveniently taking voltages, it is characterized in that described metallic stud (3a) has a spine front end, directly contacts with the conductor wire core of inside in order to penetrate the insulated hull with insulated hull conductor.
6. according to the straight-through current transformer of claim 1,2 or 3 described a kind of conveniently taking voltages, it is characterized in that being set with the spine electric conductor, directly contact with the conductor wire core of inside in order to penetrate insulated hull with insulated hull conductor at described metallic stud (3a) front end.
7. according to the straight-through current transformer of claim 1,2,3 or 4 described a kind of conveniently taking voltages, it is characterized in that also comprising an anti-electricity-theft face shield (6), a described anti-electricity-theft face shield is connected by non-disconnectable mode with the surface of instrument transformer body, the structure of this non-disconnectable mode is: a described anti-electricity-theft face shield (6) is provided with card and/or shackle member (6-1), and described instrument transformer body (1) is provided with and card and/or suitable shackle member and/or the card (1-2) of shackle member.
8. according to the straight-through current transformer of claim 1,2,3 or 4 described a kind of conveniently taking voltages, it is characterized in that also comprising an anti-electricity-theft face shield (6), a described anti-electricity-theft face shield (6) comprises No. one cover body (61) and the one No. two cover body (62), is connected by removable mode between a described anti-electricity-theft face shield (6) and the instrument transformer body (1); Be connected by non-disconnectable mode between described No. one cover body with annexation and the one No. two cover body;
The concrete structure that is connected by removable mode between an anti-electricity-theft face shield (6) and the instrument transformer body (1) is:
All be fixed with chute and/or slide block (16) on described No. one cover body (61) and the one No. two cover body (62), described instrument transformer body (1) is gone up the corresponding section with No. one cover body (61) and the one No. two cover body (62), be fixed with respectively and chute and/or suitable slide block and/or the chute (17) of slide block (16), the shape of cross section of described chute (17) is up-small and down-big;
The concrete structure that connects by non-disconnectable mode between two cover bodies is:
Described No. one cover body (61) is provided with shackle member (61-1), and the one No. two cover body (62) is provided with and the suitable card (62-1) of shackle member (61-1); Shackle member (61-1) on described No. one cover body (61) is inserted in the one No. two card (62-1) on the cover body and is realized that clamping connects.
9. the straight-through current transformer of a kind of conveniently taking voltage according to claim 8 is characterized in that a described anti-electricity-theft face shield (6) is two, is fixedly installed on respectively on the surface of instrument transformer body (1) both sides.
10. according to the straight-through current transformer of claim 1,2,3 or 4 described a kind of conveniently taking voltages, the terminals place that it is characterized in that described instrument transformer body (1) is provided with No. two anti-electricity-theft face shields (7), one end of No. two anti-electricity-theft face shields (7) is fixedlyed connected with instrument transformer body (1), and the other end is provided with a cabling mouth (7-1).
11. the straight-through current transformer of a kind of conveniently taking voltage according to claim 10, it is characterized in that described No. two anti-electricity-theft face shields (7) comprise No. two cover body (71) and the two No. two cover body (72), connect by non-disconnectable mode between described No. two cover body (71) and the two No. two cover body (72), the structure of this non-disconnectable mode is: No. two cover body (71) is provided with shackle member (71-1), and the two No. two cover body (72) is provided with and the suitable card (72-1) of shackle member (71-1); Shackle member (71-1) on described No. two cover body (71) is inserted in the two No. two card (72-1) on the cover body and is realized that clamping connects;
The outer surface of the secondary connection end of described instrument transformer body (1) is provided with projection (1-3), be respectively arranged with on the inwall of described No. two cover body (71) and the two No. two cover body (72) and projection (1-3) suitable groove (18), groove (18) is installed on the projection (1-3).
12. the straight-through current transformer of a kind of conveniently taking voltage according to claim 10, the cabling mouth (7-1) that it is characterized in that described No. two anti-electricity-theft face shields (7) is located to be connected with bellows (9) by box joint (8), the outside dimension of the connecting portion (8-1) of the internal diameter size of cabling mouth (7-1) and box joint (8) is suitable, and the connecting portion (8-1) of box joint (8) is installed in the cabling mouth (7-1) and the nut by box joint (8) is fastenedly connected.
13., it is characterized in that it also comprises the cable (19) that an end is electrically connected with the internal interface line end of instrument transformer body (1) according to the straight-through current transformer of claim 1,2,3 or 4 described a kind of conveniently taking voltages; The housing of the insulated hull of described cable (19) appearance and the instrument transformer body (1) of secondary connection end is cast into one.
14. the straight-through current transformer of a kind of conveniently taking voltage according to claim 13, it is characterized in that it also comprises the bellows (20) that is sleeved on cable (19) outside, described bellows (20) also is cast into one with the housing of the instrument transformer body (1) of secondary connection end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810074348XA CN101286413B (en) | 2007-02-02 | 2008-02-01 | Straight-through current transformer convenient for measuring voltage |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710051464.5 | 2007-02-02 | ||
| CNA2007100514645A CN101034101A (en) | 2007-02-02 | 2007-02-02 | Straight-through current transformer for taking voltage from wrapping conductor using puncturing method |
| CN200710051461.1 | 2007-02-02 | ||
| CNA2007100514611A CN101034100A (en) | 2007-02-02 | 2007-02-02 | Straight-through current transformer capable of conveniently taking voltage |
| CN200810074348XA CN101286413B (en) | 2007-02-02 | 2008-02-01 | Straight-through current transformer convenient for measuring voltage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101286413A CN101286413A (en) | 2008-10-15 |
| CN101286413B true CN101286413B (en) | 2011-11-16 |
Family
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100514611A Pending CN101034100A (en) | 2007-02-02 | 2007-02-02 | Straight-through current transformer capable of conveniently taking voltage |
| CN200810074348XA Expired - Fee Related CN101286413B (en) | 2007-02-02 | 2008-02-01 | Straight-through current transformer convenient for measuring voltage |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100514611A Pending CN101034100A (en) | 2007-02-02 | 2007-02-02 | Straight-through current transformer capable of conveniently taking voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN101034100A (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101034099B (en) * | 2007-02-02 | 2011-05-25 | 湖北盛佳电器设备有限公司 | Straight-through current transformer with anti-theft electric surface shield |
| CN101487859B (en) * | 2008-01-15 | 2013-01-23 | 湖北盛佳电器设备有限公司 | High-voltage direct measurement apparatus |
| DE102009059008B4 (en) * | 2009-12-17 | 2015-04-16 | Phoenix Contact Gmbh & Co. Kg | Device for releasably securing a conductor to a current transformer housing |
| CN102313833A (en) * | 2011-07-22 | 2012-01-11 | 四川省电力公司达州电业局 | Voltage signal collector |
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| CN108281268A (en) * | 2018-04-04 | 2018-07-13 | 宁波台龙电力科技有限公司 | A kind of high-precision anti-open-close type mutual inductor of height |
| CN109378170A (en) * | 2018-12-13 | 2019-02-22 | 上海康比利仪表有限公司 | A kind of mutual inductor installation structure |
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| CN111948448A (en) * | 2020-08-20 | 2020-11-17 | 国网河北省电力有限公司沧州供电分公司 | Anti-electricity-stealing system based on expert knowledge base |
| CN112908621B (en) * | 2021-01-20 | 2022-11-08 | 国网浙江省电力有限公司台州供电公司 | Mutual inductor with stable fixing structure |
| CN113471769B (en) * | 2021-07-07 | 2024-04-02 | 贵州电网有限责任公司 | Split conductor current circulation ice melting combiner |
| CN114062752A (en) * | 2021-11-18 | 2022-02-18 | 浙江天正电气股份有限公司 | Mutual inductor processing method and consistency implementation method of mutual inductor and metering core |
| CN118507230A (en) * | 2024-05-07 | 2024-08-16 | 浙江华采科技有限公司 | Sleeve type electronic transformer for ring main unit and auxiliary installation equipment thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101286413A (en) | 2008-10-15 |
| CN101034100A (en) | 2007-09-12 |
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