CN210430587U - Metal-enclosed three-phase three-wire medium-high voltage combined metering box - Google Patents
Metal-enclosed three-phase three-wire medium-high voltage combined metering box Download PDFInfo
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- CN210430587U CN210430587U CN201921647648.2U CN201921647648U CN210430587U CN 210430587 U CN210430587 U CN 210430587U CN 201921647648 U CN201921647648 U CN 201921647648U CN 210430587 U CN210430587 U CN 210430587U
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Abstract
The utility model belongs to the technical field of electrical equipment, especially, relate to a metal enclosed three-phase three-wire medium-high voltage combination batch meter, mainly by last casing, lower casing, installing support, terminal box, three combination mutual-inductor, three thunderbolt ware and five lead wire sleeve pipes constitute, wherein every combination mutual-inductor is a voltage transformer and a current transformer integrated structure that forms by epoxy casting under vacuum environment, a connection voltage mutual-inductor in the middle of three combination mutual-inductor, current transformer is idle, adopt dry-type oilless structure promptly, replace oil insulation, remove greasy dirt and fire disaster from, alleviate maintenance work, and seal by the metal casing, have fine shielding effect to the mutual-inductor of inside, increase of service life; in addition, three combined transformers are adopted, so that the adverse factors of large integral volume and complex wiring caused by the adoption of five single transformers can be avoided.
Description
Technical Field
The utility model belongs to the technical field of electrical equipment, especially, relate to a metal enclosed three-phase three-wire medium-high voltage combination batch meter.
Background
The high-voltage metering box combined transformer is mainly used for high-voltage electric energy metering, is particularly suitable for medium and small transformer users, and can completely and accurately meter active electric energy and reactive electric energy. The traditional metering box mainly comprises a combined transformer and an electric meter box, wherein the combined transformer comprises two or three single-phase voltage transformers and two or three current transformers, 25# transformer oil is used as an insulating medium, and a primary outlet end and a secondary outlet end are both arranged on a shell by porcelain sleeves. The electric meter box is arranged on the side surface of the combined mutual inductor and consists of a power electric meter and a reactive electric meter.
The transformer oil for the combined transformer with the traditional structure is used as a medium, the environment can be polluted, oil pollution treatment is difficult, the maintenance work difficulty is increased, and the hidden danger of fire hazard is realized, so that the safe, reliable and economic operation of the power grid is given in order to avoid the adverse factor of the oil metering box on the environmental pollution, the requirement of the 10kv power grid oil-free management is met, and the dry type metering box has certain significance.
SUMMERY OF THE UTILITY MODEL
To prior art's not enough, this utility model provides a three-way medium and high voltage combination batch meter of metal enclosed three-phase replaces oil insulation by dry-type batch meter to adopt integrative combination mutual-inductor to make a secondary line simpler.
In order to achieve the purpose, the utility model provides a metal-enclosed three-phase three-wire medium-high voltage combined metering box, which mainly comprises an upper shell, a lower shell, a mounting bracket, a junction box, three combined transformers, three thunderstorms and five lead sleeves, wherein the mounting bracket is mounted on the bottom surface of the lower shell through a groined channel steel, the three combined transformers are mounted in the lower shell in parallel, each combined transformer is an integrated structure formed by casting a voltage transformer and a current transformer, the side surface of the lower shell is provided with a junction box mounting hole for mounting the junction box, and three lightning arrester fixing seats for mounting the lightning arresters are arranged; the upper shell is fixedly connected with the lower shell through bolts, five lead bushing mounting holes for mounting the lead bushings are formed in the side face of the upper shell, and the three lead bushings for connecting the power transmission line are correspondingly connected with the three lightning arresters through leads.
As the utility model relates to a metal enclosed three-phase three-wire medium-high voltage combination batch meter's further improvement: the secondary lead of the combined transformer is connected with the terminal strip in the junction box and is used for being connected with the gauge; a primary lead of the combined transformer is led to the outer end of the output of the lead bushing to be connected with a power transmission line, and one of the three combined transformers is only connected with a voltage transformer and is not connected with a current transformer.
As the utility model relates to a metal enclosed three-phase three-wire medium-high voltage combination batch meter's further improvement: the three combined transformers are fixedly connected with the groined channel steel through bolts penetrating through the bottom surface of the lower shell.
As the utility model relates to a metal enclosed three-phase three-wire medium-high voltage combination batch meter's further improvement: the five lead sleeves are arranged at the lead sleeve mounting holes through bolts, and the leading-out wire ends of the lead sleeves are sleeved with sealing gaskets and fixedly connected with lead sleeve covers.
As the utility model relates to a metal enclosed three-phase three-wire medium-high voltage combination batch meter's further improvement: the side surfaces of the lower shell and the upper shell are also respectively provided with a lifting lug.
The utility model discloses a beneficial effect of metal enclosed three-phase three-wire medium-high voltage combination batch meter: on one hand, a dry-type oil-free metal sealing structure is adopted to replace oil insulation, so that oil stains and fires are avoided, and the maintenance work is reduced; on the other hand, an integrated combined transformer unit formed by casting a current transformer and a voltage transformer which are combined into a whole is adopted, so that the adverse factors that the single voltage transformer and the single current transformer are complex in primary and secondary wiring, and the main space is large and the cost is high are avoided.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the exploded structure of the present invention;
FIG. 3 is a schematic structural view of the channel steel in the shape of Chinese character 'jing';
FIG. 4 is a primary wiring diagram of the combined transformer of the present invention;
FIG. 5 is a secondary wiring diagram of the combined transformer of the present invention;
in the figure: 1. the combined transformer comprises a combined transformer body, a lower shell, a 201 lightning arrester fixing seat, a 3 mounting support, a 4 junction box, a 401 terminal row, a 5 lightning arrester, a 6 upper shell, a 7 lead sleeve, a 8 groined channel steel, a 9 lifting lug.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
The utility model discloses a pair of three-way medium-high voltage combination batch meter of metal-enclosed three-phase, including last casing 6, casing 2 down, installing support 3, terminal box 4, three combination mutual-inductor 1, three thunderbolt thunder ware 5 and five lead wire sleeve pipes 7, wherein installing support 3 installs in casing 2 bottom surface down through # -shaped channel-section steel 8, three combination mutual-inductor 1 installs side by side in casing 2 down, and is concrete, bolt and # -shaped channel-section steel 8 fixed connection of three combination mutual-inductor 1 through wearing to establish casing 2 bottom surface down to every combination mutual-inductor 1 is sealed the casting and becomes an integral unit in vacuum environment by a voltage transformer and an epoxy for current transformer.
The side surface of the lower shell 2 is provided with a junction box mounting hole for mounting a junction box 4, a nameplate mounting hole for mounting a nameplate and three lightning arrester fixing seats 201 for mounting lightning arresters 5, wherein the combined transformer 1 is connected with a terminal row 101 in the junction box 4 through a secondary lead and is further connected with a meter; go up casing 6 and be in the same place through bolt and lower casing 2 fixed connection, go up the lead wire sleeve mounting hole that five installation lead wire sleeves 7 were seted up to the side of casing 6, wherein three of five lead wire sleeves 7 are used for inserting transmission line, and two are used for the output line in addition, wherein three lead wire sleeves 7 that are used for inserting transmission line correspond with three arrester 5 respectively through the lead wire and are connected, make up mutual-inductor 1 simultaneously and correspond and connect a lead wire, this time lead wire is worn to establish lead wire sleeve 7's bushing hole to lead wire sleeve 7's outer end.
One of the three combined transformers 1 is only connected with a voltage transformer, and the current transformer is idle. As shown in fig. 4 and 5, A, B, C three-phase lines accessed by the three lead bushings 7 are grounded through the lightning arrester 5; the windings of the two current transformers are respectively connected into an A-phase circuit (the winding between two end points AP1 and AP 2) and a C-phase circuit (the winding between two end points CP1 and CP 2) through primary leads, and three-wire connectors as1, as2, as3, cs1, cs2 and cs3 which are respectively led out are connected into a terminal row 401 in the junction box 4 through secondary leads; the primary windings of the three voltage transformers are respectively connected with A, B, C three-phase lines and a zero line through primary leads, three-wire joints a, n, b, n, c and n led out from the secondary windings are respectively connected with a terminal block 401 in a junction box 4 through secondary leads, wherein the joints as3 and cs3 are in short circuit and are grounded, and the joint n is grounded.
Preferably, the periphery of the secondary lead is protected by a flexible hose and the periphery of the adapter; the box body is firmer, and the upper shell 6 and the lower shell 2 take a square pipe frame as a framework; meanwhile, lifting lugs 9 are arranged on the upper shell 6 and the lower shell 2 for facilitating the installation of the box body.
The metering box adopts a dry oil-free structure to replace oil insulation, oil stain and fire are avoided, maintenance work is reduced, the metering box is sealed by a metal shell, a good shielding effect is achieved on an internal mutual inductor, and the service life is prolonged; in addition, an integrated combined transformer formed by casting a current transformer and a voltage transformer which are combined into a whole can be adopted, so that the adverse factors of large integral volume and complex wiring caused by adopting five single transformers can be avoided.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent changes without departing from the technical scope of the present invention.
Claims (5)
1. The utility model provides a metal enclosed three-phase three-wire medium-high voltage combination batch meter which characterized in that: the lightning arrester installation structure mainly comprises an upper shell, a lower shell, an installation support, a junction box, three combined transformers, three lightning arresters and five lead sleeves, wherein the installation support is installed on the bottom surface of the lower shell through a groined-shaped channel steel, the three combined transformers are installed in the lower shell in parallel, each combined transformer is an integrated structure formed by casting a voltage transformer and a current transformer, the side surface of the lower shell is provided with a junction box installation hole for installing the junction box, and three lightning arrester fixing seats for installing the lightning arresters are arranged; the upper shell is fixedly connected with the lower shell through bolts, five lead bushing mounting holes for mounting the lead bushings are formed in the side face of the upper shell, and the three lead bushings for connecting the power transmission line are correspondingly connected with the three lightning arresters through leads.
2. The metal-enclosed three-phase three-wire medium-high voltage combined metering box according to claim 1, characterized in that: the secondary lead of the combined transformer is connected with the terminal strip in the junction box and is used for being connected with the gauge; a primary lead of the combined transformer is led to the outer end of the output of the lead bushing to be connected with a power transmission line, and one of the three combined transformers is only connected with a voltage transformer and is not connected with a current transformer.
3. The metal-enclosed three-phase three-wire medium-high voltage combination metering box of claim 1, characterized in that: the three combined transformers are fixedly connected with the groined channel steel through bolts penetrating through the bottom surface of the lower shell.
4. The metal-enclosed three-phase three-wire medium-high voltage combination metering box of claim 1, characterized in that: the five lead sleeves are arranged at the lead sleeve mounting holes through bolts, and the leading-out wire ends of the lead sleeves are sleeved with sealing gaskets and fixedly connected with lead sleeve covers.
5. The metal-enclosed three-phase three-wire medium-high voltage combination metering box of claim 1, characterized in that: the side surfaces of the lower shell and the upper shell are also respectively provided with a lifting lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921647648.2U CN210430587U (en) | 2019-09-29 | 2019-09-29 | Metal-enclosed three-phase three-wire medium-high voltage combined metering box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921647648.2U CN210430587U (en) | 2019-09-29 | 2019-09-29 | Metal-enclosed three-phase three-wire medium-high voltage combined metering box |
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| Publication Number | Publication Date |
|---|---|
| CN210430587U true CN210430587U (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921647648.2U Active CN210430587U (en) | 2019-09-29 | 2019-09-29 | Metal-enclosed three-phase three-wire medium-high voltage combined metering box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117856048A (en) * | 2024-03-05 | 2024-04-09 | 国网山东省电力公司鄄城县供电公司 | Modularized power metering box |
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2019
- 2019-09-29 CN CN201921647648.2U patent/CN210430587U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117856048A (en) * | 2024-03-05 | 2024-04-09 | 国网山东省电力公司鄄城县供电公司 | Modularized power metering box |
| CN117856048B (en) * | 2024-03-05 | 2024-05-24 | 国网山东省电力公司鄄城县供电公司 | Modularized power metering box |
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