CN103245838B - A kind of cable insulation test system - Google Patents
A kind of cable insulation test system Download PDFInfo
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- CN103245838B CN103245838B CN201310151306.2A CN201310151306A CN103245838B CN 103245838 B CN103245838 B CN 103245838B CN 201310151306 A CN201310151306 A CN 201310151306A CN 103245838 B CN103245838 B CN 103245838B
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- 238000012360 testing method Methods 0.000 title claims abstract description 53
- 238000009413 insulation Methods 0.000 title claims abstract description 40
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 239000011810 insulating material Substances 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000011218 segmentation Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 abstract description 15
- 239000004020 conductor Substances 0.000 description 11
- 238000005259 measurement Methods 0.000 description 4
- 241000270722 Crocodylidae Species 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- LNNWVNGFPYWNQE-GMIGKAJZSA-N desomorphine Chemical compound C1C2=CC=C(O)C3=C2[C@]24CCN(C)[C@H]1[C@@H]2CCC[C@@H]4O3 LNNWVNGFPYWNQE-GMIGKAJZSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The present invention relates to a kind of cable insulation test system, be made up of insulation resistance meter, cable connection dish, test operation case, ground lead, cable cleat five part, described cable connection dish is made up of insulating material, it is totally the shape of middle part rectangle, both sides semicircle, vertically fix three metal connection posts in the middle part of cable connection dish, a metal connection post is vertically fixed in lower right side; Described test operation case is seal case, shell is the insulating material such as rigid plastic, and test operation upper box part has two metal connection posts, and four metal connection posts are arranged at bottom, there is a switch on right side, the panel of test operation case has six segmentation mechanical switch switches and a self-locking button; Described ground lead adopts the multiply annealed copper wire of tape insulation crust.Native system is in measuring process, and do not need to change wiring, the test duration shortens about 80%; Significantly reduce the possibility of wiring error simultaneously, significantly improve work efficiency, ensure that the safety of test process.
Description
Technical field
The invention belongs to power domain, relate to the testing apparatus of cable, especially a kind of cable insulation test system.
Background technology
The application of cable in urban power distribution network is increasingly extensive, in use inevitably produces fault.When cable generation earth fault or phase-to phase fault, need to use the instrument such as insulation resistance meter to adopt and measure each relatively and the mode of alternate insulation resistance to judge which there occurs shorted to earth mutually, or which two-phase there occurs phase fault.Owing to there is distributed capacitance between cable and the earth, so can charge to cable by the process of insulation resistance meter measurement insulating resistance of cable; If discharged by cable grounding not in time, electric charge residual in cable can make coating-forming voltage between cable and the earth poor, threatens the safety of the person and equipment.When measuring the insulation resistance of cable with insulation resistance meter, need the conductor of cable to be measured to hold with the L of insulation resistance meter to be connected, earthing pole is held with the E of insulation resistance meter and is connected.After each measurement completes, also need the conductor of cable and earthing pole through conductive discharge.
At present, there is following shortcoming in the Apparatus and method for measuring insulating resistance of cable:
1, measure successively each relatively, in the process of phase insulation resistance and electric discharge, need repeated disassembled and assembled connecting line, not only time-consuming but also require great effort, and easily make mistakes;
, there is the shortcomings such as loose contact, serviceable life is short in 2, the usual employing crocodile clip clamping of connection;
3, operating space is little, and cable is generally positioned at bottom switch cubicle, with unsighted during crocodile clip clamping, and operating difficulties, and likely cannot retain enough safe distances, cause person electric shock to wait major accident;
4, during cable discharge, according to method that is cable conductor is direct and earthing pole short circuit, easily there is the phenomenons such as sparking, electric discharge, the personal safety of serious threat testing crew and the safe operation of equipment; Whether according to by the method for cable conductor through the material such as branch, batten and earthing pole short circuit, the velocity of discharge is slow, and do not know to put clean, and the easy residual charge of cable, causes danger; According to special discharge equipment, then there is again the shortcomings such as equipment volume is large, total amount is large, cost is high, not portable;
5, in cable discharge process, insulation resistance meter can not stop manual operation, therefore at least needs two staff just can complete, waste of manpower and time, and cooperation easily makes mistakes
By retrieval, not yet find the patent document identical with the present patent application.
Summary of the invention
The object of the invention is to the weak point overcoming original technology, a kind of cable insulation test system is provided, this device can effectively be avoided occurring that sparking, electric discharge etc. threaten the phenomenon of the person, device security, cable conductor connection safely, conveniently, reliably, cable discharge process is rapid, safety, and electric discharge device is safe and reliable, easy and simple to handle, with low cost.
The technical scheme that technical solution problem of the present invention adopts is:
A kind of cable insulation test system, be made up of insulation resistance meter, cable connection dish, test operation case, ground lead, cable cleat five part, wherein test operation case electrical connection insulation resistance meter, test operation case is by lead-in wire stube cable patching panel, the triple-phase line of cable connection dish is respectively by the triple-phase line of cable cleat stube cable, this cable connection dish connects earth polar by ground lead, it is characterized in that:
Described cable connection dish is made up of insulating material, and be totally the shape of middle part rectangle, both sides semicircle, vertically fix three metal connection posts in the middle part of cable connection dish, a metal connection post is vertically fixed in lower right side;
Described test operation case is seal case, shell is the insulating material such as rigid plastic, and test operation upper box part has two metal connection posts, and four metal connection posts are arranged at bottom, there is a switch on right side, the panel of test operation case has six segmentation mechanical switch switches and a self-locking button;
Described ground lead adopts the multiply annealed copper wire of tape insulation crust.
And the internal circuit principle of described test operation case is as follows, L, E are top connection terminal, for connecting insulation resistance meter; A ', B ', C ', G ' are bottom connection terminal, for stube cable patching panel; L ', E ' are back panel wiring terminal, and wherein L ' is connected with L through master switch, and E ' is directly connected with E; R1, R2 are discharge resistance, and S2 is foot-operated locking press button, for the electric discharge after having tested; Middle circular portion is the changeover panel of gear switch knob, and be divided into two-layer up and down, the letter outside bracket represents the link position of each contact of upper strata changeover panel, and the letter in bracket represents the link position of lower floor's changeover panel contact.
And, described cable cleat by control lever, clamp head and outer lead three part form, control lever be segmentation stretch, shrink elongated cylinder, clamp head is hook-like, and respectively there is an auxiliary spring compressing tablet inner both sides; Through bolted outside outer lead and clamp head, opposite side is semi-circular connection terminal.
Advantage of the present invention and good effect are:
1, native system is in measuring process, does not need to change wiring, and the test duration shortens about 80%; Significantly reduce the possibility of wiring error simultaneously, significantly improve work efficiency, ensure that the safety of test process.
2, the circuit portions of native system all adopts the firm wiring of bolt, avoids the loose contact of circuit, eliminates the phenomenon that sparking, electric discharge etc. may threaten the person, device security.
3, native system can make cable discharge process rapidly, safety, electric discharge device is safe and reliable, easy and simple to handle, with low cost.
4, the whole process of the test cable insulation of native system only needs a people just can complete, and at least reduces human cost 50%.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention;
Fig. 2 is the internal circuit schematic diagram of test operation case of the present invention;
Fig. 3 is cable cleat structural representation of the present invention.
Embodiment:
For content of the present invention, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows.It should be noted that, the present embodiment is descriptive, is not determinate, can not limit protection scope of the present invention thus.
A kind of cable insulation test system, be made up of insulation resistance meter 6, cable connection dish 3, test operation case 7, ground lead 5, cable cleat 1 five part, wherein test operation case electrical connection insulation resistance meter, test operation case is by lead-in wire 8 stube cable patching panel, the triple-phase line of cable connection dish is respectively by the triple-phase line (A phase, B phase and C phase) of cable cleat stube cable 2, and this cable connection dish connects earth polar 4 by ground lead.
Described insulation resistance meter can adopt common hand-rail type insulation resistance meter.
Described cable connection dish is made up of the insulating material such as timber, laminate, is totally the shape of middle part rectangle, both sides semicircle, is similar to sports filed track.Vertically fix three metal connection posts in the middle part of cable connection dish, a metal connection post is vertically fixed in lower right side.
Described test operation case is seal case, and shell is the insulating material such as rigid plastic, totally in round rectangle.Test operation upper box part has two metal connection posts, and four metal connection posts are arranged at bottom, and there is a switch on right side.The panel of test operation case there are six segmentation mechanical switch switches and a self-locking button.Rotating machinery switch, can switch gear, connects the circuit of corresponding phase, cuts off the circuit of all the other phases simultaneously.The discharge resistance of cable, earthing pole and test operation case inside forms discharge loop, for discharging the electric charge that in test process, cable distributed capacitance stores.Press self-locking button, this discharge loop can be connected.
The internal circuit principle of test operation case is as follows, is top connection terminal, for connecting insulation resistance meter see Fig. 2, L, E.A ', B ', C ', G ' are bottom connection terminal, for stube cable patching panel.L ', E ' are back panel wiring terminal, and wherein L ' is connected with L through master switch, and E ' is directly connected with E; R1, R2 are discharge resistance, and S2 is foot-operated locking press button, for the electric discharge after having tested; Middle circular portion is the changeover panel of gear switch knob, and be divided into two-layer up and down, the letter outside bracket represents the link position of each contact of upper strata changeover panel, and the letter in bracket represents the link position of lower floor's changeover panel contact.
Described ground lead adopts the multiply annealed copper wire of tape insulation crust, and connection terminal is carried out at two ends.
Described cable cleat is made up of control lever 11, clamp head 9 and outer lead 12 3 part, and see Fig. 2, control lever is made up of rigid insulation materials such as bakelites, and in elongated cylindrical, sectional stretches, contraction; Clamp head is made up of the metallic conductor such as copper, aluminium, and totally in hook-like, respectively there is an auxiliary spring compressing tablet 10 inner both sides, for compressing the cable conductor of insertion.Outer lead is made up of the metallic conductor such as copper, aluminium of outer insulating layer coating, and multiply flexible circuit conductor structure, one end is ring connection terminal, and with fastening through bolt 13 outside clamp head, opposite side is semi-circular connection terminal.
Measuring method is:
1, before measuring, threephase cable is taken off, fixes with fixture respectively, and fixture outer lead is connected on three binding posts in the middle part of cable connection dish.Ground lead one end is fixed on the earthing pole of switch cubicle, and the other end is fixed on the binding post of cable connection dish lower right side.On cable connection dish four binding post is connected with four binding posts of test operation upper box part through insulated conductor successively, the binding post of test operation lower box part is held with the L of insulation resistance meter through insulated conductor respectively, E holds and be connected.
2, when starting to test, first by the switch opens on the right side of test operation case, then the mechanical switch switch on test operation case panel is threaded to gear to be measured (as in Fig. 2 for A relatively insulation resistance, be cam structure in the middle of changeover panel, as under Fig. 2 gear stages, cam groove points to 150 ° of directions, corresponding A ' (G '), moving contact between L ' (E ') under the effect of Compress Spring with stationary contact close contact, and all the other moving contacts everywhere are all backed down by cam with stationary contact and are separated, now only A ' and L ' connects, G ' and E ' connects, lucky test be A relatively insulation resistance.All the other gears therewith principle are consistent.After measurement completes, available pin steps on S2, then L ', E ' and G ' connect, and the residual charge of test cable is discharged rapidly by discharge resistance.After measurement completes, keep the rotating speed of hand-rail type insulation resistance meter, the discharge button on the test operation case panel of tramping with one's feet, shut-down operation insulation resistance meter, has discharged, has once tested end for about 5 seconds afterwards.
Measure all the other phase times, only need mechanical switch switch on rotary test control box panel to respective notch, then repeat above operation.
Claims (2)
1. a cable insulation test system, be made up of insulation resistance meter, cable connection dish, test operation case, ground lead, cable cleat five part, wherein test operation case electrical connection insulation resistance meter, test operation case is by lead-in wire stube cable patching panel, the triple-phase line of cable connection dish is respectively by the triple-phase line of cable cleat stube cable, this cable connection dish connects earth polar by ground lead, it is characterized in that:
Described cable connection dish is made up of insulating material, and be totally the shape of middle part rectangle, both sides semicircle, vertically fix three metal connection posts in the middle part of cable connection dish, a metal connection post is vertically fixed in lower right side;
Described test operation case is seal case, shell is rigid plastic insulating material, and test operation upper box part has two metal connection posts, and four metal connection posts are arranged at bottom, there is a switch on right side, the panel of test operation case has six segmentation mechanical switch switches and a self-locking button;
Described ground lead adopts the multiply annealed copper wire of tape insulation crust;
Described cable cleat by control lever, clamp head and outer lead three part form, control lever be segmentation stretch, shrink elongated cylinder, clamp head is hook-like, and respectively there is an auxiliary spring compressing tablet inner both sides; Through bolted outside outer lead and clamp head, outer lead opposite side is semi-circular connection terminal.
2. cable insulation test system according to claim 1, is characterized in that: the internal circuit principle of described test operation case is as follows, and L, E are top connection terminal, for connecting insulation resistance meter; A ', B ', C ', G ' are bottom connection terminal, for stube cable patching panel; L ', E ' are back panel wiring terminal, and wherein L ' is connected with L through master switch, and E ' is directly connected with E; R1, R2 are discharge resistance, and S2 is foot-operated locking press button, for the electric discharge after having tested; Middle circular portion is the changeover panel of gear switch knob, and be divided into two-layer up and down, upper strata is the link position of each contact of changeover panel, and lower floor is the link position of each contact of changeover panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310151306.2A CN103245838B (en) | 2013-04-27 | 2013-04-27 | A kind of cable insulation test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310151306.2A CN103245838B (en) | 2013-04-27 | 2013-04-27 | A kind of cable insulation test system |
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| Publication Number | Publication Date |
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| CN103245838A CN103245838A (en) | 2013-08-14 |
| CN103245838B true CN103245838B (en) | 2015-09-23 |
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| CN201310151306.2A Active CN103245838B (en) | 2013-04-27 | 2013-04-27 | A kind of cable insulation test system |
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Families Citing this family (10)
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| CN104635066A (en) * | 2015-03-10 | 2015-05-20 | 李景禄 | Intelligent insulation parameter test residual charge detecting and discharging protection method |
| CN105929205A (en) * | 2016-05-24 | 2016-09-07 | 国网宁夏电力公司中卫供电公司 | Insulation resistance test auxiliary device for high-altitude equipment |
| CN106816795B (en) * | 2016-12-29 | 2019-05-21 | 武汉中车长客轨道车辆有限公司 | The insulation pressure resistance experimental method of rail vehicle connecting line |
| CN107121595A (en) * | 2017-04-11 | 2017-09-01 | 国网天津市电力公司 | Power cable insulation resistance test operating procedure |
| CN107643476B (en) * | 2017-08-01 | 2020-05-22 | 河南中烟工业有限责任公司 | Profibus bus insulation performance testing method based on virtual instrument technology |
| CN108872649A (en) * | 2018-09-06 | 2018-11-23 | 国网山东省电力公司青州市供电公司 | A kind of cable determines phase auxiliary device |
| CN110987443B (en) * | 2019-11-22 | 2021-08-24 | 中国航发沈阳黎明航空发动机有限责任公司 | Rapid switching measurement device and method for couple inspection of aircraft engine |
| CN111123046B (en) * | 2019-12-03 | 2022-06-10 | 国网河南省电力公司鹤壁供电公司 | Device for rapidly measuring cable insulation strength |
| CN111579949B (en) * | 2020-05-28 | 2023-06-23 | 创新电力技术(海南)有限公司 | Cable insulation detection device |
| CN115825661B (en) * | 2023-01-06 | 2023-04-28 | 江苏安世朗智能科技有限公司 | Detection device and system for ground insulated wire |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0783975A (en) * | 1993-09-14 | 1995-03-31 | Kawaju Bosai Kogyo Kk | Insulation monitor for electric circuit of non-grounded wiring system |
| JPH09145767A (en) * | 1995-11-24 | 1997-06-06 | Hitachi Cable Ltd | Diagnostic method for insulation of power cable line |
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- 2013-04-27 CN CN201310151306.2A patent/CN103245838B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201464617U (en) * | 2009-07-13 | 2010-05-12 | 重庆市电力公司超高压局 | Portable connecting wire switching device |
| CN201945607U (en) * | 2010-12-20 | 2011-08-24 | 宁夏电力公司宁东供电局 | High voltage test connection device for secondary winding of mutual inductor |
| CN202221434U (en) * | 2011-08-11 | 2012-05-16 | 丽水市莲都供电局 | Measurement auxiliary operating platform with insulation megger |
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| CN103245838A (en) | 2013-08-14 |
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