CN102798838B - Pluggable safety junction box for site calibration of electric energy meter - Google Patents
Pluggable safety junction box for site calibration of electric energy meter Download PDFInfo
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- CN102798838B CN102798838B CN201210313133.5A CN201210313133A CN102798838B CN 102798838 B CN102798838 B CN 102798838B CN 201210313133 A CN201210313133 A CN 201210313133A CN 102798838 B CN102798838 B CN 102798838B
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- 238000005070 sampling Methods 0.000 claims abstract description 109
- 238000009413 insulation Methods 0.000 claims abstract description 8
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 claims description 3
- 239000012634 fragment Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- 238000012795 verification Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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Abstract
The embodiment of the invention discloses a pluggable safety junction box for site calibration of an electric energy meter. The pluggable safety junction box comprises a connector socket and a connector plug, wherein the connector socket comprises a socket shell as well as current transformers, current sampling metal pieces and voltage sampling metal pieces; the current transformers, the current sampling metal pieces and the voltage sampling metal pieces are arranged in a cavity which is formed by the socket shell; the socket shell is provided with current sampling jacks, voltage sampling jacks and insulation jacks; secondary sides of the current transformers are connected with the current sampling metal pieces, and current lines of the electric energy meter to be measured are connected with primary sides of the current transformers; the voltage sampling metal pieces are connected with voltage lines of the electric energy meter to be measured; and the connector plug comprises a handheld part, current sampling plugs, voltage sampling plugs and insulation plugs. According to the pluggable safety junction box for the site calibration of the electric energy meter, the open circuit of a secondary current loop is avoided when the pluggable safety junction box is used; and the potential safety hazard of the traditional junction box is overcome.
Description
Technical field
The present invention relates to technical field of electric power, particularly relate to a kind of pluggable safety junction box for site calibration of electric energy meter.
Background technology
According to DL/T 448-2000 " electric power meter technical management code " requirement, tackle the field-checking that operating high-voltage electric-energy meter carries out actual motion load, therefore the electric power meter of access transformer secondary circuit should install the terminal box being convenient to be connected with on-site calibrator, so that carry out load field-checking.
Realizing in process of the present invention, inventor finds, existing terminal box in use all exists potential safety hazard: during wiring, its metal terminal is all exposed, very easily causes operator to get an electric shock; By stirring turn-off current connection sheet, on-site calibrator is connected and accesses the secondary current loop of metering mutual inductor, not only easily make electric current join sheet and connect insecure, more can because of people for maloperation be secondary current loop open circuit, cause a mutual inductor to damage, affect the safe and stable operation of whole electrical network.
Summary of the invention
In view of this, the object of the invention is to provide a kind of pluggable safety junction box for site calibration of electric energy meter, the potential safety hazard of existing terminal box existence of opening a way to avoid the secondary current loop in use procedure, overcome.
For achieving the above object, the invention provides following technical scheme:
A kind of pluggable safety junction box for site calibration of electric energy meter, comprises connector socket and connection plug;
Described connector socket comprises jack housing, and is placed in current transformer, current sampling metalwork and the voltage sampling metalwork in the cavity that formed by described jack housing;
Described jack housing is provided with current sampling jack, voltage sampling jack and insulation jack; Described Current Transformer Secondary side is connected with described current sampling metalwork, and the current line of electric energy meter to be measured is connected with described current transformer primary side; Described voltage sampling metalwork is connected with the pressure-wire of electric energy meter to be measured;
Described connection plug comprises Handheld Division, the current sampling plug be connected with current input terminal and the current output terminal of on-site calibrator, the voltage sampling plug be connected with the voltage input end of described on-site calibrator and blind plug; Described current sampling plug, voltage sampling plug and blind plug are fixed on described Handheld Division;
It is inner that described current sampling plug inserts described connector socket by described current sampling jack, is flexibly connected with described current sampling metalwork; It is inner that described voltage sampling plug inserts described connector socket by described voltage sampling jack, is flexibly connected with described voltage sampling metalwork.
Preferably, described current transformer is straight-through current transformer.
Preferably, described current sampling metalwork and voltage sampling metalwork are beryllium copper shell fragment metalwork.
Preferably, draw-in groove is provided with bottom described jack housing; Described connector socket is fixed on the inside of the metering cabinet at electric energy meter place to be measured by described draw-in groove, described connection plug is placed in the outside of described metering cabinet.
As can be seen from above-mentioned technical scheme, the present invention is by the primary side of the secondary current loop of electric energy meter to be measured access current transformer, by current sampling metalwork, voltage sampling metalwork, on-site calibrator is accessed the secondary side of current transformer by current sampling plug and voltage sampling plug, responded to by the electric current of current transformer, on-site calibrator is made to get electric current and the voltage of electric energy meter to be measured, do not need on-site calibrator directly to be accessed electric energy meter secondary current loop to be measured, thus the secondary circuit of electric energy meter to be measured is opened a way the electrical network that causes when having stopped to verify wiring, equipment and personal safety hidden danger.And all kinds of sampling metalwork is encapsulated in plug body, outside not being exposed to, verification personnel are stopped because of the accident potential abutting against line terminals or be with some loop and get an electric shock by mistake.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the terminal box that Fig. 1 provides for the embodiment of the present invention;
The cross-sectional view of the terminal box current sampling part that Fig. 2 provides for the embodiment of the present invention;
The cross-sectional view of the terminal box voltage sampling part that Fig. 3 provides for the embodiment of the present invention;
The connection plug of the terminal box that Fig. 4 provides for the embodiment of the present invention has just inserted schematic diagram during wire base;
The connection plug of the terminal box that Fig. 5 provides for the embodiment of the present invention inserts schematic diagram during wire base completely;
A kind of arrangement mode schematic diagram of each sampling element of terminal box that Fig. 6 provides for the embodiment of the present invention;
The structural representation of the wire base of the terminal box that Fig. 7 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of pluggable safety junction box for site calibration of electric energy meter, open a way to avoid the secondary current loop in use procedure, overcome the potential safety hazard of existing terminal box existence.
With reference to Fig. 1 ~ 3, the pluggable safety junction box for site calibration of electric energy meter that the embodiment of the present invention provides, comprises connector socket 1 and connection plug 2;
Connector socket 1 comprises jack housing 11, current transformer 12, current sampling metalwork 13 and voltage sampling metalwork 14, jack housing 11 forms a totally enclosed cavity, current transformer 12, current sampling metalwork 13 and voltage sampling metalwork 14 are all placed in this cavity, and current sampling metalwork 13 is fixedly connected with jack housing 11 by nut 05 with voltage sampling metalwork 14;
Jack housing 11 is provided with current sampling jack 15, voltage sampling jack 16 and insulation jack 17; Current transformer 12 secondary side is connected with current sampling metalwork 13, and the current line 01 of electric energy meter to be measured is connected with the primary side of current transformer 12; Voltage sampling metalwork 14 is connected with the pressure-wire of electric energy meter to be measured;
Connection plug 2 comprises Handheld Division 24, the current sampling plug 21 be connected with current input terminal 02 and the current output terminal 03 of on-site calibrator, the voltage sampling plug 22 be connected with the voltage input end 04 of on-site calibrator and blind plug 23; Current sampling plug 21, voltage sampling plug 22 and blind plug 23 are fixed on Handheld Division 24;
It is inner that current sampling plug 21 inserts connector socket 1 by current sampling jack 15, is flexibly connected with current sampling metalwork 13; It is inner that voltage sampling plug 22 inserts connector socket 1 by voltage sampling jack 16, is flexibly connected with voltage sampling metalwork 14.
Because connector socket is connected with tested electric energy meter all the time, current transformer 12 primary side has electric current to flow through all the time, open a way for preventing its secondary side, nonconducting blind plug 23 is slightly shorter than current sampling plug 21, make: when connection plug 2 does not insert connector socket 1, two the current sampling metalworks 13 be connected with same current transformer 12 contact with each other (in Fig. 2,06 is the two contact site), make the secondary circuit short-circuit of straight-through current transformer 12, as shown in Figure 2; When connection plug 2 inserts in the process of connector socket 1, current sampling metalwork first contacts with current sampling plug, and (the current sampling path namely as the load of current transformer 12 secondary side is first connected, as shown in Figure 4), blind plug 23 inserts between two current sampling metalworks 13 being connected to each other again, it is made to disconnect, as shown in Figure 5.
From the structure elder sister circuit connecting mode of above-mentioned pluggable safety junction box for site calibration of electric energy meter, the embodiment of the present invention is by the primary side of the secondary current loop of electric energy meter to be measured access current transformer, by current sampling metalwork, voltage sampling metalwork, on-site calibrator is accessed the secondary side of current transformer by current sampling plug and voltage sampling plug, responded to by the electric current of current transformer, on-site calibrator is made to get electric current and the voltage of electric energy meter to be measured, do not need on-site calibrator directly to be accessed electric energy meter secondary current loop to be measured, thus the secondary circuit of electric energy meter to be measured is opened a way the electrical network that causes when having stopped to verify wiring, equipment and personal safety hidden danger.And all kinds of sampling metalwork is encapsulated in plug body, outside not being exposed to, verification personnel are stopped because of the accident potential abutting against line terminals or be with some loop and get an electric shock by mistake.
Concrete, the current transformer 12 in above-described embodiment can adopt straight-through current transformer, and the current line of electric energy meter to be measured, through this straight-through current transformer, can realize the connection with current transformer primary side.
Further, because tested electric energy meter is three-phase and four-line electric energy meter, therefore straight-through current transformer 12 has 3, passed by A, B, C three-phase electricity streamline respectively, current sampling metalwork 13, current sampling jack 15, current sampling plug 21 all have 6, wherein 3 input for electric current, and other 3 export for electric current; Voltage sampling metalwork 14, voltage sampling jack 16 and voltage sampling plug 22 all have 4, are respectively used to the connection of A, B, C three-phase electricity line ball and zero line; Insulation jack 17 and blind plug 23 are 3.
For convenience of plug and play, said elements can arrange by mode shown in Fig. 6,111 ~ 113 corresponding 3 current sampling metalworks 13 connected from different straight-through current transformer secondary side one end, or 3 current sampling jacks 15, or 3 current sampling plugs 21, input for electric current; 201 ~ 204 corresponding 4 voltage sampling metalworks, or 4 voltage sampling jacks, or 4 voltage sampling plugs; The contact site 06 of 121 ~ 123 corresponding 3 two current sampling metalworks 13 be connected with same straight-through current transformer 12, or 3 insulation jacks 17, or 3 blind plugs 23; 131 ~ 133 all the other 3 current sampling metalworks 13 corresponding, or all the other 3 current sampling jacks 15, or all the other 3 current sampling plugs 21, export for electric current.
Visible, the terminal box described in the embodiment of the present invention adopts the access way of plug-socket, does not need any aid during verification wiring; Patching operations (being connected with connector socket by electric energy meter to be measured) is had when only first time installs, during verification, only need all kinds of sampling plugs etc. be inserted in connector socket by sampling jack, all kinds of sampling plug can be made to be connected with corresponding sampling metalwork, realize the access of on-site calibrator, simple to operate, reduce the operant level requirement to verification personnel, reduce and even stopped false wiring.
Further, in other embodiments of the present invention, the current sampling metalwork 13 in above-described embodiment and voltage sampling metalwork 14 specifically can adopt beryllium copper shell fragment metalwork.
Further, in other embodiments of the present invention, draw-in groove 07 is provided with bottom the jack housing 1 in above-mentioned all embodiments, as shown in Figure 7, for connector socket 1 being fixed on the inside of the metering cabinet at electric energy meter place to be measured, connection plug 2 is placed in the outside of described metering cabinet.
Wire base is fixed on metering cabinet inside by the above embodiment of the present invention, and the current return of electric energy meter and the lead-in wire of voltage circuit all do not expose metering cabinet, therefore only otherwise open metering cabinet, just cannot disconnect by the short circuit of electric energy meter current loop or by voltage circuit; And electric current and the voltage of electric energy meter is obtained by the electric current induction of the straight-through current transformer in wire base, the short circuit of current return is carried out also just by the secondary circuit short-circuit of straight-through current transformer by wire base, cannot to the short circuit of current loop of electric energy meter, also cannot off voltage loop.Therefore, the stealing hidden danger stopped of the above embodiment of the present invention.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (4)
1. a pluggable safety junction box for site calibration of electric energy meter, is characterized in that, comprises connector socket and connection plug;
Described connector socket comprises jack housing, and is placed in current transformer, current sampling metalwork and the voltage sampling metalwork in the cavity that formed by described jack housing;
Described jack housing is provided with current sampling jack, voltage sampling jack and insulation jack; Described Current Transformer Secondary side is connected with described current sampling metalwork, and the current line of electric energy meter to be measured is connected with described current transformer primary side; Described voltage sampling metalwork is connected with the pressure-wire of electric energy meter to be measured;
Described connection plug comprises Handheld Division, the current sampling plug be connected with current input terminal and the current output terminal of on-site calibrator, the voltage sampling plug be connected with the voltage input end of described on-site calibrator and blind plug; Described current sampling plug, voltage sampling plug and blind plug are fixed on described Handheld Division;
It is inner that described current sampling plug inserts described connector socket by described current sampling jack, is flexibly connected with described current sampling metalwork; It is inner that described voltage sampling plug inserts described connector socket by described voltage sampling jack, be flexibly connected with described voltage sampling metalwork, open a way for preventing the secondary side of current transformer, nonconducting blind plug is slightly shorter than current sampling plug, and described blind plug is inserted between two current sampling metalworks being connected to each other by insulation jack.
2. terminal box according to claim 1, is characterized in that, described current transformer is straight-through current transformer.
3. terminal box according to claim 1, is characterized in that, described current sampling metalwork and voltage sampling metalwork are beryllium copper shell fragment metalwork.
4. terminal box according to claim 1, is characterized in that, is provided with draw-in groove bottom described jack housing; Described connector socket is fixed on the inside of the metering cabinet at electric energy meter place to be measured by described draw-in groove, described connection plug is placed in the outside of described metering cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210313133.5A CN102798838B (en) | 2012-08-29 | 2012-08-29 | Pluggable safety junction box for site calibration of electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210313133.5A CN102798838B (en) | 2012-08-29 | 2012-08-29 | Pluggable safety junction box for site calibration of electric energy meter |
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| Publication Number | Publication Date |
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| CN102798838A CN102798838A (en) | 2012-11-28 |
| CN102798838B true CN102798838B (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210313133.5A Active CN102798838B (en) | 2012-08-29 | 2012-08-29 | Pluggable safety junction box for site calibration of electric energy meter |
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| CN104181494A (en) * | 2013-05-22 | 2014-12-03 | 国家电网公司 | Electric-energy-meter measurer |
| CN103605104A (en) * | 2013-09-16 | 2014-02-26 | 深圳供电局有限公司 | Three-phase electric energy meter field detection termination |
| CN103698733B (en) * | 2013-09-18 | 2016-08-17 | 国家电网公司 | A kind of test connection terminal assemblies for electric energy metrical |
| CN103713167B (en) * | 2013-12-31 | 2016-10-05 | 深圳市思达仪表有限公司 | Electric energy meter connection terminal seat and electric energy meter connection terminal seat verification structure |
| CN106505421B (en) * | 2016-11-17 | 2018-06-19 | 国网山东省电力公司阳谷县供电公司 | It is anti-electricity-theft to use power distribution cabinet |
| CN108196216A (en) * | 2016-11-20 | 2018-06-22 | 国网江西省电力公司赣东北供电分公司 | A kind of electric energy meter verifies three-phase voltage attachment device |
| CN107390159B (en) * | 2017-07-31 | 2022-08-23 | 国网山东省电力公司青州市供电公司 | Electric energy meter calibration device and use method thereof |
| CN109085402B (en) * | 2018-08-30 | 2021-08-06 | 中国电力科学研究院有限公司 | Multifunctional combined junction box for electric energy metering |
| CN111751778B (en) * | 2020-05-20 | 2022-10-04 | 中国电力科学研究院有限公司 | Detection system and method for reliable access of electric energy meter calibration instrument |
| CN112117603B (en) * | 2020-08-28 | 2022-05-06 | 贵州电网有限责任公司 | Electrical quick wiring and wiring box with wire arranging function |
| CN113625010B (en) * | 2021-07-29 | 2023-08-22 | 国网重庆市电力公司营销服务中心 | Wiring device |
| CN113391108A (en) * | 2021-07-29 | 2021-09-14 | 广东电网有限责任公司 | Plug-in type electric energy meter junction box and electric meter box |
| CN113721183B (en) * | 2021-08-31 | 2023-12-01 | 国网重庆市电力公司营销服务中心 | Modularized functional plug suitable for plug-in test junction box and use method |
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| CN102798838A (en) | 2012-11-28 |
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Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121122 |
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Effective date of registration: 20121122 Address after: 401123 No. 80, Mount Huangshan Avenue, Yubei District, Chongqing Applicant after: Chongqing Electric Power Corp., China Electric Power Research Institute Applicant after: State Grid Corporation of China Address before: 401123 No. 80, Mount Huangshan Avenue, Yubei District, Chongqing Applicant before: Chongqing Electric Power Corp., China Electric Power Research Institute |
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