CN110879305A - Lightning arrester on-line monitoring junction box - Google Patents
Lightning arrester on-line monitoring junction box Download PDFInfo
- Publication number
- CN110879305A CN110879305A CN201911074944.2A CN201911074944A CN110879305A CN 110879305 A CN110879305 A CN 110879305A CN 201911074944 A CN201911074944 A CN 201911074944A CN 110879305 A CN110879305 A CN 110879305A
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- China
- Prior art keywords
- lightning arrester
- junction
- box body
- current
- box
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
Abstract
The invention relates to an electrified monitoring junction box of a lightning arrester, which comprises a box body and junction terminals, wherein an insulating plate is fixedly arranged in the box body, four junction terminals are fixedly arranged on the insulating plate, three of the four junction terminals are ABC three-phase junction terminals, the other junction terminal is a ground wire junction terminal, two junction holes are formed in the bottom of the box body, one junction hole is used for leading a lower lead of the lightning arrester into the box body and connecting the lower lead of the lightning arrester to the junction terminals, and the other junction hole is used for connecting a lead of a lightning arrester resistance current and full current tester into the box body and connecting the lower. The lightning arrester live monitoring junction box is simple in principle, convenient to install, free of influence on normal work of an original lightning arrester, and free of damage to the lightning arrester. The operation of adopting the insulator spindle overlap joint connecting wire is replaced, so that the staff is far away from the high-voltage live equipment, the lightning arrester full current and the resistive current can be safely measured, and the dangerous operation in the process of measuring the lightning arrester full current and the resistive current is avoided.
Description
Technical Field
The invention belongs to the field of power transformation operation and machining, relates to online monitoring of an arrester, and particularly relates to an online monitoring junction box for operating a high-voltage arrester.
Background
An arrester is an electrical appliance used to protect electrical equipment from high transient overvoltages and to limit the freewheel time and also to normally limit the freewheel amplitude. The protective circuit is mainly used for protecting the insulation of alternating current power transmission and transformation equipment from being damaged by lightning overvoltage and operation overvoltage. The metal oxide lightning arrester presents a high resistance state under normal system working voltage, and only microampere current passes through the metal oxide lightning arrester. And the low resistance is presented under the action of overvoltage and large current, so that the residual voltage at two ends of the lightning arrester is limited. At present, the lightning arrester which is applied more is mainly a zinc oxide lightning arrester. The leakage current of the zinc oxide arrester can be divided into two parts: a capacitive part and a resistive part.
Because MOA has good nonlinear resistance characteristics, the inside of the zinc oxide arrester is free from gaps. Because there is no gap, the valve plate bears the action of the operating voltage of the power system for a long time in normal operation, and the valve plate is affected by factors such as internal moisture or overheating, so that the nonlinear resistance characteristic of the valve plate is deteriorated. The deterioration is mainly represented by the increase of resistive current under normal voltage, the increase of resistive current causes the increase of heat productivity, the rise of internal temperature of the arrester accelerates the aging of a valve plate, vicious cycle is formed, finally, the MOA is damaged due to overheating, explosion of the arrester can be caused in serious conditions, and large-area power failure accidents are caused. The increase of the resistance current accounting for only 10-20% of the total leakage current is considered as a main factor causing the MOA degradation, so that the accurate extraction of the resistance current from the total leakage current is the key for judging the operation condition of the MOA.
Therefore, the lightning arrester live monitoring work is one of the important works of the transformer overhaul and the electrical test class, and the work (the second work ticket) of detecting the resistive current of the lightning arrester is carried out in the transformer overhaul and the electrical test class every year.
In the online monitoring of the lightning arrester which is carried out for many times, poor contact of a connector often occurs, the distance between the connector and a primary electrified main circuit is short, and the situation that the measurement is incorrect and danger is easily brought to measuring personnel exists in the detection process of the resistive current of the lightning arrester is caused. Therefore, in the process of testing the resistive current of the lightning arrester, time and labor are consumed, and great electric shock danger exists for workers. Meanwhile, most of the existing measuring instruments are used for measuring three phases simultaneously, more workers are needed to participate in the measurement, a guardian needs to monitor a plurality of workers, equipment wiring needs to be connected to the insulating pull rod firstly in the wiring process, then the insulating pull rod is connected to a lower end lead of the lightning arrester, the working steps are complex, the workload is high, and the working efficiency is affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the lightning arrester on-line monitoring junction box which is convenient to install, can simplify the working process of measuring the resistive current and the total current of the lightning arrester, is convenient for detecting the lightning arrester in an electrified way, avoids poor contact of a ground wire connector of the lightning arrester, enables a worker to be far away from electrified equipment in the electrified detection process of the lightning arrester, reduces the electric shock risk of the worker, reduces the wiring complexity, saves the labor and improves the working efficiency.
The technical scheme adopted by the invention for solving the technical problem is as follows:
the utility model provides an arrester live monitoring junction box, includes the box, binding post, adorns the insulation board admittedly in the box, adorns four binding post admittedly on the insulation board, three of them is ABC three-phase binding post, another is ground wire binding post, system has two wiring holes in the bottom half, one of them wiring hole is arranged in introducing the box with the arrester down-lead and on the connecting wire connects binding post, another wiring hole is arranged in inserting the box with arrester resistive current and full current tester lead wire and on the connecting wire connects binding post.
Moreover, the box body comprises a cabinet door.
And the box body is connected to the lightning arrester framework through the hoop.
The invention has the advantages and positive effects that:
1. this lightning arrester live monitoring junction box has solved the problem that the operation and maintenance maintainer is complicated to lightning arrester live monitoring operation, has improved the efficiency of measuring lightning arrester total current and resistive current effectively, can change the work that needs four-man operation in the traditional operation into two-man operation.
2. The lightning arrester live monitoring junction box is simple in principle, convenient to install, free of influence on normal work of an original lightning arrester, and free of damage to the lightning arrester. The operation of adopting the insulator spindle overlap joint connecting wire is replaced, so that the staff is far away from the high-voltage live equipment, the lightning arrester full current and the resistive current can be safely measured, and the dangerous operation in the process of measuring the lightning arrester full current and the resistive current is avoided.
Drawings
Fig. 1 is a view showing an installation structure of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments, which are illustrative only and not limiting, and the scope of the present invention is not limited thereby.
The utility model provides an electrified junction box that monitors of arrester, includes box 3, binding post 4, insulation board, on the lower extreme of arrester 1 was connected to the inside binding post of box through lead wire 2, binding post fixed on the insulation board, binding post be four, wherein three be ABC three phase binding post, another is ground wire binding post. The insulation board passes through the bolt connection on the box, and the box contains the cabinet door, and the box passes through the staple bolt to be connected on the arrester framework, and the mounting height with ground should be convenient for operate, generally is less than 1.5m, and the box cabinet door should lock when not using.
In order to prevent rainwater from entering, two wiring holes are formed at the bottom of the box body, wherein one wiring hole is used for leading the lower lead of the lightning arrester into the box body and connecting the lower lead of the lightning arrester to the wiring terminal, the other wiring hole is used for leading the lead of the lightning arrester resistance current and full current tester 5 into the box body and connecting the lower lead of the lightning arrester to the wiring terminal, and the wiring box is well grounded.
The lead wire is tightly connected with the lightning arrester and the connecting terminal, so that the requirements of national power grid transformation operation management regulations are met. After the lightning arrester live-line monitoring junction box is installed, the lightning arrester resistive current and full current tester can be directly connected to three terminals in the junction box, so that the efficiency of measuring the lightning arrester resistive current and full current is effectively improved, the time of adopting the insulating rod for lap joint is reduced, the time of operating nearby live equipment by workers is reduced, and the lightning arrester live-line monitoring work is safer.
The lightning arrester lower lead wire is reliably isolated from the ground in the lightning arrester live monitoring junction box, if the lightning arrester live monitoring junction box cannot be used due to faults, the lightning arrester full current and the resistive current can be measured in a lap joint mode in a traditional mode, the measurement of the moisture absorber full current and the resistive current is not influenced, and the reliability of the lightning arrester full current and the resistive current measurement is further improved.
The using method of the invention comprises the following steps:
in the process of measuring the full current and the resistive current of the lightning arrester, the live-line monitoring junction box of the lightning arrester is opened, the three-phase connection of the test instrument is connected to three terminals in the box, and the full current and the resistive current of the lightning arrester can be measured through the terminals.
The invention completely meets the requirements in national grid transformation operation management regulations and national grid company electric power safety work regulations (transformation part) through laboratory tests, and can be applied on site.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept, and these changes and modifications are all within the scope of the present invention.
Claims (3)
1. The utility model provides an electrified junction box that monitors of arrester, includes the box, binding post, its characterized in that: an insulating plate is fixedly arranged in a box body, four wiring terminals are fixedly arranged on the insulating plate, three wiring terminals are ABC three-phase wiring terminals, the other wiring terminal is a ground wire wiring terminal, two wiring holes are formed in the bottom of the box body, one wiring hole is used for leading a lower lead of a lightning arrester into the box body and connecting the lower lead of the lightning arrester with the wiring terminals, and the other wiring hole is used for leading a lead of a lightning arrester resistance current and full current tester into the box body and connecting the lead of the lightning arrester with the wiring terminals.
2. The live lightning arrester monitoring junction box according to claim 1, characterized in that: the box body comprises a cabinet door.
3. The live lightning arrester monitoring junction box according to claim 1, characterized in that: the box passes through the staple bolt and connects on the arrester framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911074944.2A CN110879305A (en) | 2019-11-06 | 2019-11-06 | Lightning arrester on-line monitoring junction box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911074944.2A CN110879305A (en) | 2019-11-06 | 2019-11-06 | Lightning arrester on-line monitoring junction box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110879305A true CN110879305A (en) | 2020-03-13 |
Family
ID=69729086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911074944.2A Pending CN110879305A (en) | 2019-11-06 | 2019-11-06 | Lightning arrester on-line monitoring junction box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110879305A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285470A (en) * | 2020-10-23 | 2021-01-29 | 广东电网有限责任公司清远供电局 | Lightning arrester on-line monitoring appearance |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2334117Y (en) * | 1998-06-30 | 1999-08-18 | 李国展 | Terminal box with protection of information transmission terminal |
| CN2607689Y (en) * | 2003-03-22 | 2004-03-24 | 魏广强 | Multi-user safety distributing box |
| CN2798387Y (en) * | 2005-05-24 | 2006-07-19 | 四川中光高技术研究所有限责任公司 | Wired signal thunder protector |
| JP2007127558A (en) * | 2005-11-04 | 2007-05-24 | Chugoku Electric Power Co Inc:The | Terminal board for measuring ground resistance |
| CN201733056U (en) * | 2010-05-11 | 2011-02-02 | 天津市隆电电气工程有限公司 | Protective high-voltage junction box |
-
2019
- 2019-11-06 CN CN201911074944.2A patent/CN110879305A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2334117Y (en) * | 1998-06-30 | 1999-08-18 | 李国展 | Terminal box with protection of information transmission terminal |
| CN2607689Y (en) * | 2003-03-22 | 2004-03-24 | 魏广强 | Multi-user safety distributing box |
| CN2798387Y (en) * | 2005-05-24 | 2006-07-19 | 四川中光高技术研究所有限责任公司 | Wired signal thunder protector |
| JP2007127558A (en) * | 2005-11-04 | 2007-05-24 | Chugoku Electric Power Co Inc:The | Terminal board for measuring ground resistance |
| CN201733056U (en) * | 2010-05-11 | 2011-02-02 | 天津市隆电电气工程有限公司 | Protective high-voltage junction box |
Non-Patent Citations (1)
| Title |
|---|
| 王建楠 等: "避雷器阻性电流检测测试接线箱的设计", 《通信电源技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285470A (en) * | 2020-10-23 | 2021-01-29 | 广东电网有限责任公司清远供电局 | Lightning arrester on-line monitoring appearance |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200313 |