CN103245838A - Cable insulation test system - Google Patents
Cable insulation test system Download PDFInfo
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- CN103245838A CN103245838A CN2013101513062A CN201310151306A CN103245838A CN 103245838 A CN103245838 A CN 103245838A CN 2013101513062 A CN2013101513062 A CN 2013101513062A CN 201310151306 A CN201310151306 A CN 201310151306A CN 103245838 A CN103245838 A CN 103245838A
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Abstract
The invention relates to a cable insulation test system which comprises five parts, including an insulated resistance meter, a cable wiring disc, a test operation box, a grounding lead and cable clamps, wherein the cable wiring disc is made of an insulated material, the whole cable wiring disc has a rectangular middle part and two semicircular side parts, three metal wiring columns are vertically fixed in the middle of the cable wiring disc, and one metal wiring column is vertically fixed on the lower right side of the metal wiring column; the test operation box is a sealed box body, the casing of the sealed box body is made of hard plastic and other insulated materials, the upper part of the test operation box is provided with two metal wiring columns, the lower part of the test operation box is provided with four metal wiring columns, a switch is arranged on the right side of the test operation box, and a six-segment mechanical change-over switch and a self-locking button are arranged on the panel of the test operation box; and the grounding lead is a multi-strand soft copper wire with insulated outer leather. During the measurement, the system does not need to change wiring, shortens the test time by about 80 percent, meanwhile remarkably lowers the probability of a wiring error, remarkably improves working efficiency, and ensures 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 macro.
Background technology
The application of cable in urban power distribution network is increasingly extensive, in use produces fault inevitably.When cable generation earth fault or phase-to phase fault, need to use instrument such as insulation resistance meter to adopt to measure each mode that relatively reaches alternate insulation resistance to judge which shorted to earth has taken place mutually, or phase fault has taken place in which two-phase.Owing to exist distributed capacitance between cable and the earth, can charge to cable with the process of insulation resistance meter measurement insulating resistance of cable; If untimely residual electric charge can make between cable and the earth and form voltage difference in the cable with the cable grounding discharge, threaten the safety of the person and equipment.When measuring the insulation resistance of cable with insulation resistance meter, the conductor of cable to be measured need be linked to each other with the L end of insulation resistance meter, earthing pole links to each other with the E end of insulation resistance meter.Each measure finish after, also need the conductor of cable and earthing pole through conductive discharge.
At present, there is following shortcoming in the Apparatus and method for of measurement insulating resistance of cable:
1, measuring each successively relatively, in the process of phase insulation resistance and discharge, need the repeated disassembled and assembled connecting line, not only time-consuming but also effort, and make mistakes easily;
2, there are shortcomings such as loose contact, serviceable life be short in the common employing crocodile clip clamping that connects of circuit;
3, the operating space is little, and cable generally is positioned at the switch cubicle bottom, and is unsighted during with the crocodile clip clamping, operating difficulties, and might can't keep enough safe distances, cause person electric shock to wait major accident;
When 4, cable discharges, if adopt the method for cable conductor is direct and earthing pole short circuit, be prone to phenomenons such as sparking, discharge, the personal safety of serious threat testing crew and the safe operation of equipment; If adopt cable conductor through the method for materials such as branch, batten with the earthing pole short circuit, whether the velocity of discharge is slow, and do not know to put only, and the easy residual charge of cable causes danger; If adopt special-purpose discharge equipment, then have shortcomings such as equipment volume is big, total amount is big, cost is high, not portable again;
5, in the cable discharge process, insulation resistance meter can not stop manual operation, therefore needs two staff just can finish at least, waste of manpower and time, and cooperation makes mistakes easily
By retrieval, do not find the publication document identical with the present patent application as yet.
Summary of the invention
The objective of the invention is to overcome the weak point of original technology, a kind of cable insulation test macro is provided, this device can effectively be avoided occurring striking sparks, discharge etc. threatens the phenomenon of the person, device security, cable conductor connects safety, convenient, reliable, the 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 macro, constituted by insulation resistance meter, cable connection dish, test operation case, ground lead, cable cleat five parts, wherein the test operation case is electrically connected insulation resistance meter, the test operation case is by lead-in wire stube cable patching panel, the triple-phase line of cable connection dish is passed through the triple-phase line of cable cleat stube cable respectively, this cable connection dish connects the earth polar by ground lead, it is characterized in that:
Described cable connection dish is made by insulating material, totally is middle part rectangle, both sides semi-circular shape, and three metal connection posts are vertically fixed at cable connection dish middle part, and a metal connection post is vertically fixed in the lower right side;
Described test operation case is seal case, shell is insulating material such as rigid plastic, and the test operation upper box part has two metal connection posts, and four metal connection posts are arranged at the bottom, there is a switch on the right side, and six segmentation mechanical switch switches and a self-locking button are arranged on the panel of test operation case;
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, and L, E are the top connection terminal, is used for connecting insulation resistance meter; A ', B ', C ', G ' are the bottom connection terminal, are used for the stube cable patching panel; L ', E ' are the back panel wiring terminal, and wherein L ' links to each other with L through master switch, and E ' directly links to each other with E; R1, R2 are discharge resistance, and S2 is foot-operated locking press button, are used for the discharge after test is finished; Middle circular portion is the changeover panel of gear switch knob, and is two-layer about being divided into, and the outer letter of bracket represents the link position of each contact of changeover panel, upper strata, and the letter in the bracket represents the link position of lower floor's changeover panel contact.
And described cable cleat is made up of control lever, clamp head and outer lead three parts, and control lever is the elongated cylinder that segmentation stretches, shrinks, and clamp head is hook-like, and respectively there is an auxiliary spring compressing tablet inner both sides; Outer lead and the clamp head outside are through bolted, and opposite side is semi-circular connection terminal.
Advantage of the present invention and good effect are:
1, native system does not need to change wiring in measuring process, and the test duration has shortened about 80%; Obviously reduce simultaneously the possibility of wiring error, significantly improved work efficiency, guaranteed test process security.
2, the circuit each several part of native system all adopts the firm wiring of bolt, has avoided the loose contact of circuit, has eliminated the phenomenon that sparking, discharge etc. may threaten the person, device security.
3, native system can make the 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 of native system insulation only needs a people just can finish, and reduces human cost 50% at least.
Description of drawings
Fig. 1 is system architecture synoptic 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 further understanding content of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows.Need to prove that present embodiment is descriptive, is not determinate, can not limit protection scope of the present invention thus.
A kind of cable insulation test macro, constituted by insulation resistance meter 6, cable connection dish 3, test operation case 7, ground lead 5, cable cleat 1 five parts, wherein the test operation case is electrically connected insulation resistance meter, the test operation case is by lead-in wire 8 stube cable patching panels, by the triple-phase line (A phase, B reach the C phase mutually) of cable cleat stube cable 2, this cable connection dish connects earth polar 4 by ground lead to the triple-phase line of cable connection dish respectively.
Described insulation resistance meter can adopt common hand-rail type insulation resistance meter to get final product.
Described cable connection dish is made of insulating material such as timber, laminates, totally is middle part rectangle, both sides semi-circular shape, is similar to sports filed track.Three metal connection posts are vertically fixed at cable connection dish middle part, and a metal connection post is vertically fixed in the lower right side.
Described test operation case is seal case, and shell is insulating material such as rigid plastic, totally is round rectangle.The test operation upper box part has two metal connection posts, and four metal connection posts are arranged at the bottom, and there is a switch on the right side.Six segmentation mechanical switch switches and a self-locking button are arranged on the panel of test operation case.The 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 constitutes discharge loop, is used for discharging the electric charge that test process cable distribution electric capacity stores.Press the self-locking button, can connect this discharge loop.
The internal circuit principle of test operation case is as follows, and referring to Fig. 2, L, E are the top connection terminal, is used for connecting insulation resistance meter.A ', B ', C ', G ' are the bottom connection terminal, are used for the stube cable patching panel.L ', E ' are the back panel wiring terminal, and wherein L ' links to each other with L through master switch, and E ' directly links to each other with E; R1, R2 are discharge resistance, and S2 is foot-operated locking press button, are used for the discharge after test is finished; Middle circular portion is the changeover panel of gear switch knob, and is two-layer about being divided into, and the outer letter of bracket represents the link position of each contact of changeover panel, upper strata, and the letter in the 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 parts, and referring to Fig. 2, control lever is made by rigid insulation materials such as bakelites, is elongated cylindrical, and sectional stretches, shrinks; Clamp head is made by metallic conductors such as copper, aluminium, totally is hook-like, and respectively there is an auxiliary spring compressing tablet 10 inner both sides, is used for compressing the cable conductor of insertion.Outer lead is made by metallic conductors such as the copper of outer insulating layer coating, aluminium, multiply flexible circuit conductor structure, and an end is the ring connection terminal, fastening through bolt 13 with the clamp head outside, opposite side is semi-circular connection terminal.
Measuring method is:
1, before the measurement, threephase cable is taken off, fixed with anchor clamps respectively, and the anchor clamps outer lead is connected on three binding posts at cable connection dish middle part.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.Four binding posts on the cable connection dish are linked to each other with four binding posts of test operation upper box part through the insulation lead successively, and the binding post of test operation lower box part links to each other with L end, the E end of insulation resistance meter through the insulation lead respectively.
2, when beginning to test, elder generation is with the switch opens on test operation case right side, then the mechanical switch switch on the test operation case panel is threaded to gear to be measured (as among Fig. 2 being A insulation resistance relatively, be cam structure in the middle of the changeover panel, under Fig. 2 gear stages, cam groove points to 150 ° of directions, corresponding A ' (G '), moving contact between the L ' (E ') closely contacts with stationary contact under the effect of compression spring, and all the other moving contacts are everywhere all backed down by cam with stationary contact and separate, this moment is A ' and L ' connection only, G ' and E ' connect, and test is A insulation resistance relatively just.All the other gears are the principle unanimity therewith.After measurement was finished, available pin was stepped on S2, and then L ', E ' and G ' connect, and the residual charge of test cable discharges rapidly by discharge resistance.After measurement is finished, 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, the shut-down operation insulation resistance meter discharges after about 5 seconds and finishes, an end of test (EOT).
Measure all the other phase times, only the mechanical switch switch on the need rotary test control box panel repeats above operation then and gets final product to respective notch.
Claims (3)
1. cable insulation test macro, constituted by insulation resistance meter, cable connection dish, test operation case, ground lead, cable cleat five parts, wherein the test operation case is electrically connected insulation resistance meter, the test operation case is by lead-in wire stube cable patching panel, the triple-phase line of cable connection dish is passed through the triple-phase line of cable cleat stube cable respectively, this cable connection dish connects the earth polar by ground lead, it is characterized in that:
Described cable connection dish is made by insulating material, totally is middle part rectangle, both sides semi-circular shape, and three metal connection posts are vertically fixed at cable connection dish middle part, and a metal connection post is vertically fixed in the lower right side;
Described test operation case is seal case, shell is insulating material such as rigid plastic, and the test operation upper box part has two metal connection posts, and four metal connection posts are arranged at the bottom, there is a switch on the right side, and six segmentation mechanical switch switches and a self-locking button are arranged on the panel of test operation case;
Described ground lead adopts the multiply annealed copper wire of tape insulation crust.
2. cable insulation test macro according to claim 1, it is characterized in that: the internal circuit principle of described test operation case is as follows, and L, E are the top connection terminal, are used for connecting insulation resistance meter; A ', B ', C ', G ' are the bottom connection terminal, are used for the stube cable patching panel; L ', E ' are the back panel wiring terminal, and wherein L ' links to each other with L through master switch, and E ' directly links to each other with E; R1, R2 are discharge resistance, and S2 is foot-operated locking press button, are used for the discharge after test is finished; Middle circular portion is the changeover panel of gear switch knob, and is two-layer about being divided into, and the outer letter of bracket represents the link position of each contact of changeover panel, upper strata, and the letter in the bracket represents the link position of lower floor's changeover panel contact.
3. cable insulation test macro according to claim 1, it is characterized in that: described cable cleat is made up of control lever, clamp head and outer lead three parts, control lever is the elongated cylinder that segmentation stretches, shrinks, and clamp head is hook-like, and respectively there is an auxiliary spring compressing tablet inner both sides; Outer lead and the clamp head outside are through bolted, and opposite side is semi-circular connection terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310151306.2A CN103245838B (en) | 2013-04-27 | 2013-04-27 | A kind of cable insulation test system |
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| CN201310151306.2A CN103245838B (en) | 2013-04-27 | 2013-04-27 | A kind of cable insulation test system |
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| CN103245838A true CN103245838A (en) | 2013-08-14 |
| CN103245838B CN103245838B (en) | 2015-09-23 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106816795A (en) * | 2016-12-29 | 2017-06-09 | 武汉中车长客轨道车辆有限公司 | The quick resistance to platen press of rail vehicle tubular terminal |
| CN107121595A (en) * | 2017-04-11 | 2017-09-01 | 国网天津市电力公司 | Power cable insulation resistance test operating procedure |
| CN107643476A (en) * | 2017-08-01 | 2018-01-30 | 河南中烟工业有限责任公司 | A kind of Profibus insulated bus performance test methods based on virtual instrument technique |
| 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 |
| CN110987443A (en) * | 2019-11-22 | 2020-04-10 | 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 |
| CN111123046A (en) * | 2019-12-03 | 2020-05-08 | 国网河南省电力公司鹤壁供电公司 | Device for rapidly measuring cable insulation strength |
| CN111579949A (en) * | 2020-05-28 | 2020-08-25 | 海南驿电通科技有限公司 | Cable insulation detection device |
| CN115825661A (en) * | 2023-01-06 | 2023-03-21 | 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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| 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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| 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 |
| CN201464617U (en) * | 2009-07-13 | 2010-05-12 | 重庆市电力公司超高压局 | Portable connecting wire switching device |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106816795A (en) * | 2016-12-29 | 2017-06-09 | 武汉中车长客轨道车辆有限公司 | The quick resistance to platen press of rail vehicle tubular terminal |
| 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 |
| CN107643476A (en) * | 2017-08-01 | 2018-01-30 | 河南中烟工业有限责任公司 | A kind of Profibus insulated bus performance test methods based on virtual instrument technique |
| 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 |
| CN110987443A (en) * | 2019-11-22 | 2020-04-10 | 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 |
| CN111123046A (en) * | 2019-12-03 | 2020-05-08 | 国网河南省电力公司鹤壁供电公司 | Device for rapidly measuring cable insulation strength |
| 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 |
| CN111579949A (en) * | 2020-05-28 | 2020-08-25 | 海南驿电通科技有限公司 | Cable insulation detection device |
| CN111579949B (en) * | 2020-05-28 | 2023-06-23 | 创新电力技术(海南)有限公司 | Cable insulation detection device |
| CN115825661A (en) * | 2023-01-06 | 2023-03-21 | 江苏安世朗智能科技有限公司 | Detection device and system for ground insulated wire |
| 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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