CN201955360U - Wiring clamp - Google Patents
Wiring clamp Download PDFInfo
- Publication number
- CN201955360U CN201955360U CN2011200537460U CN201120053746U CN201955360U CN 201955360 U CN201955360 U CN 201955360U CN 2011200537460 U CN2011200537460 U CN 2011200537460U CN 201120053746 U CN201120053746 U CN 201120053746U CN 201955360 U CN201955360 U CN 201955360U
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- China
- Prior art keywords
- jointing clamp
- isolating switch
- jaw
- contact
- lead
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The embodiment of the utility model discloses a wiring clamp. The lower clamping jaw of the wiring clamp is wider than the upper clamping jaw, contacts of voltage lead wires and circuit breaker lead wires and contacts of current lead wires and the circuit breaker lead wires are arranged in a staggered way. By adopting the wiring clamp, the measurement of the contact resistance value of a circuit breaker can be achieved.
Description
Technical field
This project relates to a kind of isolating switch checkout equipment, measures jointing clamp more specifically to a kind of circuit breaker contact persistence.
Background technology
Isolating switch is as the important step of power system safety and stability operation; it act as in electric system and breaks down when maybe needing maintenance to have a power failure; cut off and connect no-load current and load current in the high-tension circuit; can also under the system failure, match, rapidly the disengagement failure electric current with protective device and aut.eq..Under normal circumstances the fracture of isolating switch (i.e. deciliter position) should closely connect, as connect and badly then can produce excessive contact resistance, make isolating switch reduce its serviceable life at the normal inner heat that produces in service, when flowing through, electric current causes simultaneously the isolating switch heating, cause isolating switch built-in electrical insulation oil or insulation to reduce, thereby cause isolating switch good arc extinguishing accident such as cause that switch bursts when turn-off current with megohmite insulant insulating capacities such as SF6 gases.
In order accurately to grasp isolating switch fracture contact situation, in time find the loose contact problem, in real work, usually measure electrical test method such as contact resistance and carry out check and analysis, but traditional detection method is measured the contact resistance that the loop exists measuring lead wire and isolating switch junction because the wiring problem causes, actual measured value is impacted, even the problem of test result gross error occurs.
Referring to Fig. 1 and Fig. 2, Fig. 1 measures wiring diagram for existing circuit breaker contact persistence; Fig. 2 is existing circuit breaker contact persistence metering circuit figure.The circuit breaker contact persistence of widespread usage is measured jointing clamp now, and the upper and lower jaw of jointing clamp connects pressure-wire and electric current line respectively.As shown in Figure 1, existing upper and lower jaw 3, the 4 width unanimities of jointing clamp, causing voltage lead and current feed is same point with the contact point of isolating switch lead-in wire, can see that by the analysis of Fig. 2 the contact resistance of lead-in wire contact resistance of 2 contact points and isolating switch 1 read by voltage table 7 simultaneously, because the isolating switch fracture 5 contact resistance R of place are very little." A " represents the contact point of jointing clamp upper jaw and isolating switch lead-in wire among Fig. 2.So the contact resistance R1 at " A " contact point place and R2 are very big to the influence of circuit breaker contact persistence among Fig. 2, cause voltage table 7 reading error higher, can not accurately reflect isolating switch fracture actual contact situation.
When jointing clamp was connected with isolating switch, electric current line, pressure-wire connected at same contact point with the isolating switch external lead wire, and reasons such as the different and space, contact position of the metal material that adopts owing to jaw and isolating switch lead-in wire can cause the contact site to produce contact resistance.Because the circuit breaker contact persistence value is a microampere order, therefore measurement is the technical barrier of this area to the circuit breaker contact persistence value.
Pass through theoretical analysis, the contact resistance of finding loop, current feed place has a significant impact actual measured value, the measuring resistance influence of loop, voltage lead place can be ignored, so the current return contact resistance is the principal element that influences circuit breaker contact persistence value measured value.Consider the certainty that contact resistance produces, merely solve metal material and to be connected the slit input cost huge, and produce little effect.
The electric current line of present employed jointing clamp, pressure-wire are same contact point.So just lead resistance and contact resistance have been incorporated in the tested equipment, will have produced measuring error like this.
In addition, present employed jointing clamp, pressure is not enough, and contact angle has certain limitation, may cause the loose contact of jointing clamp and test specimen, increases measuring error.
Therefore, how providing a kind of jointing clamp, realize the accurate measurement of circuit breaker contact persistence value, is those skilled in the art's technical issues that need to address.
The utility model content
For solving the problems of the technologies described above, the utility model purpose is to provide a kind of jointing clamp, realizes the accurate measurement of circuit breaker contact persistence value.
For achieving the above object, the utility model provides following technical scheme:
The utility model provides a kind of jointing clamp, and the width of jointing clamp lower jaw is greater than the width of upper jaw, the contact point that the contact point of voltage lead and isolating switch lead-in wire and current feed and isolating switch the go between setting of staggering mutually.
Preferably, described jointing clamp lower jaw is a whole wiring jaw.
Preferably, described jointing clamp lower jaw comprises jointing clamp lower-left jaw and jointing clamp bottom right jaw.
Preferably, the contact point of voltage lead and isolating switch lead-in wire is arranged on the inboard of the contact point that current feed and isolating switch go between.
Preferably, the contact point of voltage lead and isolating switch lead-in wire is arranged on the outside of the contact point that current feed and isolating switch go between.
Preferably, the width of described jointing clamp lower jaw is 42mm.
Preferably, the width of described jointing clamp upper jaw is 18mm.
Preferably, described voltage lead contacts with described jointing clamp lower jaw, and described current feed contacts with described jointing clamp upper jaw.
The described jointing clamp of the utility model embodiment, because the width of described jointing clamp lower jaw is greater than the width of upper jaw, and the setting of staggering mutually of the contact point that goes between of the contact point of voltage lead and isolating switch lead-in wire and current feed and isolating switch.
The width of the lower jaw by enlarging jointing clamp has promptly enlarged jointing clamp lower end contact area, can realize voltage lead when reality connects and current feed stagger mutually, thereby eliminate the influence of measuring loop current lead-in wire contact resistance, measurement result can reflect the contact resistance of isolating switch reality all-sidedly and accurately.Thereby be convenient in time discover problems and solve them.The mode of connection of new jointing clamp is with the mode of connection unanimity of former jointing clamp, can in real work, not add heavily to the difficulty of the work for the staff, because new jointing clamp has pull bar user of service Ground Operation again, avoided originally must climbing to the problem of carrying out high-altitude wiring on the isolating switch.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 measures wiring diagram for existing circuit breaker contact persistence;
Fig. 2 is existing circuit breaker contact persistence metering circuit figure;
Fig. 3 is the described jointing clamp structural representation of the utility model embodiment;
Fig. 4 is that the described circuit breaker contact persistence of the utility model embodiment is measured wiring diagram;
Fig. 5 is circuit breaker contact persistence metering circuit figure described in the utility model.
Embodiment
The utility model purpose is to provide a kind of jointing clamp, realizes the accurate measurement of circuit breaker contact persistence value.
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Referring to Fig. 3 to Fig. 5, Fig. 3 is the described jointing clamp structural representation of the utility model embodiment; Fig. 4 is that the described circuit breaker contact persistence of the utility model embodiment is measured wiring diagram; Fig. 5 is circuit breaker contact persistence metering circuit figure described in the utility model.
The described jointing clamp of the utility model embodiment, jointing clamp lower jaw 4 width be greater than upper jaw 3 width, 2 contact points and current feed and the isolating switch 2 contact points setting of staggering mutually that goes between that goes between of voltage lead and isolating switch.
The jointing clamp lower jaw can be a wiring jaw of integral body, and jointing clamp lower jaw 4 also can be the left and right lower jaw of jointing clamp as shown in Figure 3.
When current feed links to each other (contact) with jointing clamp upper jaw 3, voltage lead and jointing clamp lower jaw 4 continuous (contact).Be that voltage lead can link to each other with jointing clamp lower-left jaw or jointing clamp bottom right jaw.
Voltage lead and isolating switch 2 contact points that go between can be arranged on the go between inboard of 2 contact points of current feed and isolating switch.
Voltage lead and isolating switch 2 contact points that go between can also be arranged on the go between outside of 2 contact points of current feed and isolating switch.
The width of described jointing clamp lower jaw is specially 42mm.The width of described jointing clamp upper jaw is specially 18mm.
When voltage lead links to each other (contact) with jointing clamp upper jaw 3, current feed and jointing clamp lower jaw 4 continuous (contact).Be that current feed can link to each other with jointing clamp lower-left jaw or jointing clamp bottom right jaw.
Analysis by Fig. 5, jointing clamp lower jaw 4 (jointing clamp lower-left jaw and jointing clamp bottom right jaw integral width) is wider than jointing clamp upper jaw 3, the contact point C of voltage lead and isolating switch lead-in wire is in the inboard of the contact point of current feed and isolating switch lead-in wire B simultaneously, can see that contact resistance that current feed produces beyond voltage table reading loop, can not exert an influence to the circuit breaker contact persistence measurement.Though the contact resistance that voltage lead produces is in the voltage table loop, but because the resistance value of R3, R4 (R3, R4 are the contact resistance at " C " contact point place) is far smaller than the internal resistance value of voltage table, the voltage of its branch can be ignored, and can the measurement of circuit breaker contact persistence R not exerted an influence.
The described jointing clamp of the utility model embodiment, existing relatively jointing clamp has tangible economic benefit.
Utilize the described jointing clamp of the utility model embodiment, can finish 1 year workload, can reduce the maintainer relatively this type of isolating switch: (1.24 hours/people .-0.67 a hour/people .) 160/0.67 hour/people of *. item=136 people; Therefore can save 20 yuan of * 136 people of artificial recondition expense=2720 yuan.
Owing to utilize the described jointing clamp of the utility model embodiment to save fully to ascend a height in the service work and connect disconnecting lead and finish this working time, so can save 1 year relatively to the service work power off time of this type of isolating switch 91.2 hours
Therefore, can save loss of outage relatively: 91.2 hours=1754688 yuan of 0.52 yuan of * 37000 degree/hour *.
Can save loss of outage relatively: 175.4688 ten thousand yuan
The above only is the embodiment of the described jointing clamp of the utility model embodiment, need to prove, present embodiment does not constitute any restriction to the utility model, any those of ordinary skill in the art, do not breaking away under the technical solutions of the utility model scope situation, all can utilize the method and the technology contents of above-mentioned announcement that technical solutions of the utility model are made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solutions of the utility model, all still belongs in the scope of technical solutions of the utility model protection any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present utility model.
Claims (8)
1. a jointing clamp is characterized in that, the width of jointing clamp lower jaw is greater than the width of upper jaw, the contact point that the contact point of voltage lead and isolating switch lead-in wire and current feed and isolating switch the go between setting of staggering mutually.
2. jointing clamp according to claim 1 is characterized in that, described jointing clamp lower jaw is a whole wiring jaw.
3. jointing clamp according to claim 1 is characterized in that, described jointing clamp lower jaw comprises jointing clamp lower-left jaw and jointing clamp bottom right jaw.
4. according to the arbitrary described jointing clamp of claim 1 to 3, it is characterized in that the contact point of voltage lead and isolating switch lead-in wire is arranged on the inboard of the contact point that current feed and isolating switch go between.
5. according to the arbitrary described jointing clamp of claim 1 to 3, it is characterized in that the contact point of voltage lead and isolating switch lead-in wire is arranged on the outside of the contact point that current feed and isolating switch go between.
6. according to the arbitrary described jointing clamp of claim 1 to 3, it is characterized in that the width of described jointing clamp lower jaw is 42mm.
7. according to the arbitrary described jointing clamp of claim 1 to 3, it is characterized in that the width of described jointing clamp upper jaw is 18mm.
8. according to the arbitrary described jointing clamp of claim 1 to 3, it is characterized in that described voltage lead contacts with described jointing clamp lower jaw, described current feed contacts with described jointing clamp upper jaw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200537460U CN201955360U (en) | 2011-03-03 | 2011-03-03 | Wiring clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200537460U CN201955360U (en) | 2011-03-03 | 2011-03-03 | Wiring clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201955360U true CN201955360U (en) | 2011-08-31 |
Family
ID=44499468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200537460U Expired - Fee Related CN201955360U (en) | 2011-03-03 | 2011-03-03 | Wiring clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201955360U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111596100A (en) * | 2020-05-28 | 2020-08-28 | 南京工程学院 | Intelligent high-altitude wiring device for electrical test and use method |
-
2011
- 2011-03-03 CN CN2011200537460U patent/CN201955360U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111596100A (en) * | 2020-05-28 | 2020-08-28 | 南京工程学院 | Intelligent high-altitude wiring device for electrical test and use method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20120303 |