CN110554225A - split type three-phase three-wire high-voltage electric energy metering box - Google Patents
split type three-phase three-wire high-voltage electric energy metering box Download PDFInfo
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- CN110554225A CN110554225A CN201910815541.2A CN201910815541A CN110554225A CN 110554225 A CN110554225 A CN 110554225A CN 201910815541 A CN201910815541 A CN 201910815541A CN 110554225 A CN110554225 A CN 110554225A
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- phase
- voltage
- electric energy
- voltage electric
- connecting arm
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/04—Housings; Supporting racks; Arrangements of terminals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
Abstract
The invention discloses a split type three-phase three-wire high-voltage electric energy metering box which comprises two single-phase combined transformers, wherein each single-phase combined transformer comprises a power supply end, a load end and a B-phase voltage end which are connected with a high-voltage power grid, the two single-phase combined transformers are independently packaged and can be interchanged, after the two single-phase combined transformers are interchanged, the connection positions of the power supply end, the load end and the B-phase voltage end and a power supply, a load and a lead of a B-phase wire of the high-voltage power grid are unchanged, the two B-phase voltage ends are still connected with the B-phase wire of the high-voltage power grid through the lead between the two single-phase combined transformers, two single-phase combined transformer monomers which are independently packaged and have the same appearance structure and internal connection are combined into one three-phase three-wire.
Description
[ technical field ]
The invention relates to a split type three-phase three-wire high-voltage electric energy metering box, belonging to a measuring instrument.
[ background art ]
The electric energy metering is the basis of economic accounting and charging in each link of a power grid, and a three-phase three-wire high-voltage electric energy metering box is a high-voltage metering device which is widely applied to a 6 kV-10 kV high-voltage power grid, and is generally combined and packaged into a whole by two voltage transformers and two current transformers, so that the three-phase three-wire high-voltage electric energy metering box has the characteristics of compact structure and the like.
For example, the Chinese invention patent 'an outdoor two-element three-phase power metering box with protection' is published under the number CN 108535525A, and the application date is as follows: in 2018, 7 and 5 days ", although products and related electrical equipment can be protected by additionally arranging a fuse, the problems that the whole needs to be replaced after a fault, the installation is inconvenient and the like cannot be solved.
[ summary of the invention ]
The invention overcomes the defects of the technology, and provides a split type three-phase three-wire high-voltage electric energy metering box, which is characterized in that two single-phase combined mutual inductor monomers with the same appearance structure and the same internal connection are combined into the three-phase three-wire high-voltage electric energy metering box to realize electric energy metering, the weight of the single-phase combined mutual inductor monomer on the corresponding side is greatly reduced, the installation is light, when a single mutual inductor is damaged, the single-phase combined mutual inductor monomer on the corresponding side is replaced, the contradiction between the compact structure and the light installation of the whole metering box device is reasonably solved, the problem of the interchange of two single-body devices of the metering box is also solved, and the spare part.
In order to achieve the purpose, the invention adopts the following technical scheme:
The utility model provides a three-way high-voltage electric energy metering box of split type three-phase, includes two single-phase combined mutual inductor 1, single-phase combined mutual inductor 1 includes power end 2, load end 3 and the B phase voltage end 4 of being connected with high voltage electric network, and two single-phase combined mutual inductors 1 independently encapsulate and can exchange, two single-phase combined mutual inductors 1 back of interchanging, power end 2, load end 3 and B phase voltage end 4 are unchangeable with the position of being connected of the power of high voltage electric network, load, the lead wire of B phase line, and two B phase voltage ends 4 still are connected with the B phase line of high voltage electric network by the lead wire between two single-phase combined mutual.
According to the split type three-phase three-wire high-voltage electric energy metering box, the single-phase combined transformer 1 is provided with the voltage end insulating connecting arm 13 which extends upwards and protrudes out, and the B-phase voltage end 4 is arranged on the voltage end insulating connecting arm 13.
According to the split type three-phase three-wire high-voltage electric energy metering box, the fuses 7 are respectively connected between the power supply end 2 and one primary end of the voltage transformer 6 and between the B-phase voltage end 4 and the other primary end of the voltage transformer 6.
A three-way high-voltage electric-energy metering box of split type three-phase, be equipped with the installation cavity on power end insulating link arm 11 and the voltage end insulating link arm 13 respectively, be fixed with conductive spring 14 in the installation cavity respectively, two conductive spring 14 stiff ends are connected with voltage transformer 6 both ends once respectively, conductive spring 14 elastic end is connected with fuse 7 that sets up in the installation cavity respectively, the fuse 7 other end that sets up in power end insulating link arm 11 installation cavity passes through the elastic contact piece and is connected with power end 2 of installation cavity open end, the fuse 7 other end that sets up in the voltage end insulating link arm 13 installation cavity passes through the elastic contact piece and is connected with B looks voltage end 4 of installation cavity open end.
According to the split type three-phase three-wire high-voltage electric energy metering box, the opening end of the installation cavity is provided with the sealing cover in detachable connection or fixed connection.
The invention has the beneficial effects that:
1. with three-wire high-voltage electricity of three-phase can the batch meter divide into two independent single-phase combination mutual-inductors, single equipment weight alleviates, is convenient for install and remove on the post or on the distribution rack, and is compacter for current four independent mutual-inductors structures.
2. When a single mutual inductor is damaged, the single-phase combined mutual inductor at the corresponding side is replaced without replacing the integrated whole metering box, so that the replacement equipment of the split type metering box is less than that of the three-phase integrated one, and the loss can be reduced.
3. after the single-phase combined mutual inductor is divided into two independent single-phase combined mutual inductors, after one single-phase combined mutual inductor breaks down, the work of the other single-phase combined mutual inductor is not influenced, the three-phase full voltage loss is not caused, and the remote meter reading and fault alarming functions are not influenced.
4. Because the voltage transformer must have an end to connect the power, guarantee the primary side current of the voltage transformer does not flow through the current transformer, if set up and connect the insulating support of other phase voltage laterally, the insulating support that must have one of two single-phase combined transformers connects other phase voltage is on the left side of the power end, another one is on the right side of the power end, two single-phase combined transformers can't be exchanged, increase the cost of spare parts, the invention adopts and sets up the insulating support vertically upwards on the current transformer, two single-phase combined transformers can be exchanged, can reduce the variety of the spare parts, therefore save the cost of spare parts.
5. The fuses are respectively arranged at two ends of the primary side of the voltage transformer, so that the expansion of the fault of the short circuit between the primary side and the ground can be prevented, and if the fault of the short circuit between the primary side of the voltage transformer and the ground occurs, the fuses at the two ends of the primary side of the voltage transformer are immediately fused, so that the voltage transformer is separated from a high-voltage power grid, and the expansion of the fault is prevented.
[ description of the drawings ]
FIG. 1 is a schematic structural diagram of a single-phase combined transformer;
FIG. 2 is a wiring schematic diagram of a single-phase combined transformer
FIG. 3 is a schematic structural diagram of a single-phase combined transformer with a built-in fuse;
FIG. 4 is a wiring schematic diagram of a built-in fuse single-phase combined transformer;
FIG. 5 is a schematic structural diagram of a split type three-phase three-wire high-voltage electric energy metering box;
Fig. 6 is a wiring schematic diagram of the split type three-phase three-wire high-voltage electric energy metering box.
[ detailed description of the invention ]
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.
As shown in fig. 1 and 2, the single-phase combined transformer 1 has a structure, the single-phase combined transformer 1 includes a power supply terminal 2 connected to a high-voltage power grid, a load terminal 3, and a B-phase voltage terminal 4, a single-phase current transformer 5 and a single-phase voltage transformer 6 are disposed in the single-phase combined transformer 1, two ends of a primary side of the single-phase current transformer 5 are respectively connected to the power supply terminal 2 and the load terminal 3, two ends of a primary side of the single-phase voltage transformer 6 are respectively connected to the power supply terminal 2 and the B-phase voltage terminal 4, and two ends of a secondary side of the single-phase current transformer 5 and two ends of.
The single-phase combined transformer 1 is provided with a power end insulating connecting arm 11, a load end insulating connecting arm 12 and a voltage end insulating connecting arm 13, wherein the power end insulating connecting arm 11 and the load end insulating connecting arm 12 extend towards two sides respectively, the voltage end insulating connecting arm 13 extends upwards, the power end 2 is arranged on the power end insulating connecting arm 11, the load end 3 is arranged on the load end insulating connecting arm 12, and the B-phase voltage end 4 is arranged on the voltage end insulating connecting arm 13.
Because the B-phase voltage end 4 is arranged on the insulating connecting arm 13 which extends upwards, the problem that if one of the two B-phase voltage ends extends out from the right side, the other B-phase voltage end must extend out from the left side, and the two B-phase voltage ends are different in structure and cannot be interchanged when the original integrated three-phase three-wire high-voltage electric energy metering box is simply split is solved.
As shown in fig. 3 and 4, a fuse 7 is respectively connected between the power supply terminal 2 and one primary end of the voltage transformer 6, and between the B-phase voltage terminal 4 and the other primary end of the voltage transformer 6, the utility model discloses a fuse-fuse terminal, including power end insulating connecting arm 11, voltage end insulating connecting arm 13, be equipped with the installation cavity on power end insulating connecting arm 11 and the voltage end insulating connecting arm 13 respectively, be fixed with conductive spring 14 in the installation cavity respectively, two conductive spring 14 stiff ends are connected with voltage transformer 6 both ends once respectively, conductive spring 14 elastic end is connected with fuse 7 that sets up in the installation cavity respectively, the fuse 7 other end that sets up in power end insulating connecting arm 11 installation cavity is connected with power end 2 through the elastic contact piece of installation cavity open end, the fuse 7 other end that sets up in voltage end insulating connecting arm 13 installation cavity is connected with B looks voltage end 4 through the elastic contact piece of installation cavity open end, the installation cavity open.
The fuse has the advantages that when the primary current of the voltage transformer rises, the metal wire in the fuse is fused, the voltage transformer is disconnected with a high-voltage power grid at one time, and the voltage transformer is prevented from being failed to influence the safe operation of the high-voltage power grid.
As shown in fig. 5 and fig. 6, the split three-phase three-wire high-voltage electric energy metering box is characterized in that: the power supply end 2 of one single-phase combined mutual inductor 1 is connected with a phase line power supply of a high-voltage power grid, the load end 3 is connected with a phase line load of the high-voltage power grid, the phase voltage end 4 of the B phase is connected with a phase line lead of the high-voltage power grid, the power supply end 2 of the other single-phase combined mutual inductor 1 is connected with a phase line power supply of the C phase of the high-voltage power grid, the load end 3 is connected with the phase line load of the C phase of the high-voltage power grid, and the phase voltage end.
As shown in fig. 5, after the two single-phase combined transformers 1 are exchanged, the connection orientations of the power supply terminal 2, the load terminal 3 and the B-phase voltage terminal 4 with the power supply, the load and the B-phase lead of the high-voltage power grid are not changed, as shown in the figure, after the two single-phase combined transformers 1 are exchanged, the power supply terminal 2 is still on, the load terminal 3 is still on, the B-phase voltage terminal 4 is still in the middle, and the two B-phase voltage terminals 4 are still connected with the B-phase lead of the high-voltage power grid through the lead between the two single-phase combined transformers 1.
When one of the single-phase combined transformers in the split type electric energy metering box breaks down, only the single-phase combined transformer which breaks down needs to be replaced, and the whole metering phase does not need to be replaced.
because two single-phase combined transformers forming the three-phase three-wire high-voltage electric energy metering box can be exchanged and the two single-phase combined transformers are the same spare parts, the spare part cost of fault maintenance can be saved
The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a three-way high-voltage electric energy batch meter of split type three-phase which characterized in that: including two single-phase combined mutual-inductors (1), single-phase combined mutual-inductor (1) include power end (2), load end (3) and the B phase voltage end (4) be connected with high voltage electric network, and two single-phase combined mutual-inductors (1) independently encapsulate and can exchange, and two single-phase combined mutual-inductors (1) exchange the back, power end (2), load end (3) and B phase voltage end (4) are unchangeable with the position of connection of the power of high voltage electric network, load, the lead wire of B phase line, and two B phase voltage ends (4) are still connected with high voltage electric network's B phase line by the lead wire between two single-phase combined mutual-inductors (1).
2. The split three-phase three-wire high-voltage electric energy metering box according to claim 1, characterized in that: the single-phase combined transformer (1) is provided with a voltage end insulating connecting arm (13) extending upwards and protruding out, and the B-phase voltage end (4) is arranged on the voltage end insulating connecting arm (13).
3. The split three-phase three-wire high-voltage electric energy metering box according to claim 1, characterized in that: and fuses (7) are respectively connected between the power supply end (2) and one primary end of the voltage transformer (6) and between the B-phase voltage end (4) and the other primary end of the voltage transformer (6).
4. The split type three-phase three-wire high-voltage electric energy metering box according to claim 3, characterized in that: the power end insulating connecting arm (11) and the voltage end insulating connecting arm (13) are respectively provided with a mounting cavity, the mounting cavities are respectively internally and fixedly provided with a conductive spring (14), two fixed ends of the conductive spring (14) are respectively connected with two primary ends of a voltage transformer (6), the elastic end of the conductive spring (14) is respectively connected with a fuse (7) arranged in the mounting cavity, the other end of the fuse (7) arranged in the power end insulating connecting arm (11) mounting cavity is connected with the power end (2) through an elastic contact piece at the opening end of the mounting cavity, and the other end of the fuse (7) arranged in the voltage end insulating connecting arm (13) mounting cavity is connected with a B phase voltage end (4) through an elastic contact piece at the opening end of.
5. the split three-phase three-wire high-voltage electric energy metering box according to claim 4, characterized in that: the open end of the installation cavity is provided with a sealing cover which can be detachably connected or fixedly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910815541.2A CN110554225A (en) | 2019-08-30 | 2019-08-30 | split type three-phase three-wire high-voltage electric energy metering box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910815541.2A CN110554225A (en) | 2019-08-30 | 2019-08-30 | split type three-phase three-wire high-voltage electric energy metering box |
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| Publication Number | Publication Date |
|---|---|
| CN110554225A true CN110554225A (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910815541.2A Pending CN110554225A (en) | 2019-08-30 | 2019-08-30 | split type three-phase three-wire high-voltage electric energy metering box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111308191A (en) * | 2020-03-26 | 2020-06-19 | 国家能源集团宁夏煤业有限责任公司 | Coal mine electric energy metering system |
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2019
- 2019-08-30 CN CN201910815541.2A patent/CN110554225A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111308191A (en) * | 2020-03-26 | 2020-06-19 | 国家能源集团宁夏煤业有限责任公司 | Coal mine electric energy metering system |
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