CN201435455Y - Special stub clip for secondary CT loop in power transformation and distribution system - Google Patents
Special stub clip for secondary CT loop in power transformation and distribution system Download PDFInfo
- Publication number
- CN201435455Y CN201435455Y CN2009200734194U CN200920073419U CN201435455Y CN 201435455 Y CN201435455 Y CN 201435455Y CN 2009200734194 U CN2009200734194 U CN 2009200734194U CN 200920073419 U CN200920073419 U CN 200920073419U CN 201435455 Y CN201435455 Y CN 201435455Y
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- loop
- distribution system
- occlusal end
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- draw point
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Abstract
A special stub clip for a secondary CT loop in a power transformation and distribution system belongs to the field of electric conductivity connection. One occlusion end of an alligator clip adopts asteel needle type occlusion end, and the other adopts a conventional saw-toothed occlusion end, and the steel needle type occlusion end and the conventional saw-toothed occlusion end are oppositely clamped with, in contact with/occluded with each other under the effect of a spring mounted on a hinge shaft. The steel needle type occlusion end is inserted into the gap between a pressure plate of a connecting terminal and a lower connecting piece and the conventional saw-toothed occlusion end is buckled and pressed on the pressure plate of the terminal. The two occlusion ends are oppositely clamped and consolidated on the pressure plate of the connecting terminal, so as to form a stable and firm stressing structure and reliable electric connection relation, thereby ensuring electric connection effect, preventing detachment, trustily guaranteeing the short circuit effect of the secondary CT loop, and providing safety assurance to avoid the threatening to the lives of working personnel caused by high voltage discharge formed in case of accidental detachment of the alligator clip. The stub clip can be widely applied to the field of operation and maintenance of a secondary loop in the power transformation and distribution system.
Description
Technical field
The utility model belongs to the connection area of conductivity, relates in particular to a kind of circuit connecting mechanism that is used for short circuit transformation and distribution system secondary CT loop terminals.
Background technology
In the transformer station of transformation and distribution system, the high pressure primary current is transformed into secondary current by current transformer CT, for uses such as relaying protection, measurements.
The loop structure of secondary current as shown in Figure 1, as seen from the figure, the load of protections at different levels, measurement is connected in the secondary current loop, from the angle that is electrically connected, the secondary current loop must guarantee the continuity that it is electrically connected, and must not " open a way ".Otherwise, in case " open circuit " phenomenon (being usually said " disconnection ") appears in the secondary current loop, will produce high voltage in the secondary current loop, the person and device security are brought threat/injury, these are early existing clear and definite regulation in the safe operation rules of electric power system.
In actual motion and maintenance/maintenance work, sometimes need set under the condition that is in the " RUN " state fully once becoming, the load equipment that withdraws from the secondary current loop carries out various work, need carry out " short circuit " this moment with the secondary current loop, promptly, " short circuit " that is electrically connected at terminal A shown in Figure 1, B place (promptly being electrically connected), to guarantee the continuity of its current circuit, then, withdraw from some load equipment on the secondary current loop, load equipment is carried out various tests, replacing or other maintenance/maintenance works.
At this moment, because at terminal A, there is one in the B place because aforementioned " short circuit " electrical connection that measure produced, so from current transformer CT one side, continuity on whole secondary current loop is still keeping being electrically connected, so the time will be positioned at terminal A, the B back (sees it is to be positioned at terminal A from Fig. 1, the B right side) load equipment (promptly from the secondary current loop, pull down or disconnect) out of service, can in the secondary current loop, not produce high voltage, thereby both guaranteed the regulation of safe operation rules, the person and device security there is not threat, again can be under the prerequisite of the operation that does not influence primary equipment, the problem of in time handling each load equipment on the secondary current loop (is included under the live state of the normal operation of primary equipment, finish maintenance or replacing) to various load equipments in the secondary current loop, be the continuous of a distribution equipment, safety, stable operation provides guarantee; So, regular being used of operation/working method of this " being electrically connected to prevent secondary current loop open circuit " at terminal A, B place.
Although the part switch cubicle has been arranged in transformation and distribution system now or has become power distribution equipment and begun to be provided with/to be equipped with special secondary current loop current testing terminal (being equivalent to be specifically designed to aforementioned " A, the B terminal " that " short circuit " usefulness is gone up in electrical connection), but in fact, because the difference in device fabrication age also has very most switch cubicle or becomes power distribution equipment to be to use general common/conventional binding post.Therefore how carrying out safe and reliable electric current " short circuit " on the common binding post of this kind equipment/device, is the practical problem that often faces in the real work at the scene.
In the test process of electronics industry, use a kind of crocodile clip (claiming test clip or electricity folder again) through regular meeting usually because of the shape of its front end mouth, so a crocodile clip as crocodile; Light, the easy folder of this clamp behind its tail end welding lead, is connected to power end or other test leads again.Its front end has two interlocks in opposite directions, has the occlusal end of zigzag inner side edge/medial surface, two occlusal end connect by a hinge, constitute a similar scissors-like structure, hinge is provided with a spring, respectively two occlusal end clamps are applied an elasticity by two ends of spring and press (pushing away) power, the effect of utilization lever principle and spring, making between two occlusal end of crocodile clip can clamping test thing or lead, so that carry out test job.
For " short circuit " secondary current loop on general common/conventional binding post, a lot of people also can use existing crocodile clip to realize being electrically connected function in the real work, it uses two crocodile clips that are electrically connected by lead, two dentation occlusal end of each crocodile clip, clamp the target binding post pressing plate of required connection or the housing pin of binding post pressing plate respectively, realize being electrically connected between crocodile clip and the binding post, and then, realize the purpose in its " short circuit " secondary current loop with two common/conventional binding posts " short circuit ".
Though traditional crocodile clip also can short circuit secondary current loop, but because its structural limitation, make that the snap-in between its occlusal end and " short circuit " target is insecure or unreliable, cause the slippage on binding post or pressing plate or the housing pin of its occlusal end easily, make and form high-voltage discharge and serious threat staff's life security by the secondary current loop open circuit that meets accident.
The utility model content
Technical problem to be solved in the utility model provides the special-purpose short-term folder in a kind of transformation and distribution system secondary CT loop, and it both can guarantee to be electrically connected effect, was difficult for slippage again; Can guarantee " short circuit " effect in secondary CT loop reliably, under the situation that does not have the special-purpose current testing terminal of setting/outfit, connect, with the work in level secondary current loop, convenient back for secondary CT loop provides safe and reliable " short circuit "; For avoiding unexpected slippage, form high-voltage discharge and threaten staff's life that safety assurance is provided because of crocodile clip.
The technical solution of the utility model is: provide a kind of transformation and distribution system secondary CT loop special-purpose short-term folder, comprise crocodile clip with two occlusal end, it is characterized in that: an occlusal end of described crocodile clip is a draw point formula occlusal end, and another occlusal end is conventional zigzag occlusal end.
Described draw point is taper, oblique cone type or wedge shape draw point.
Described draw point formula occlusal end and another conventional zigzag occlusal end under the effect that is installed in the spring on the hinge, clamp contact/interlock in opposite directions.
In the slit between described draw point formula occlusal end is inserted the binding post pressing plate and descended in flakes, described conventional zigzag occlusal end is withheld on the pressing plate of terminals, both clamp in opposite directions, be cemented on the pressing plate of binding post, constitute stable and firm force structure and reliable electrical connection.
The tail end of described crocodile clip is provided with the connection lead, connects lead two crocodile clips are connected as one, and constitutes electrical connection.
Compared with the prior art, the utility model has the advantages that:
1. owing to adopt draw point formula occlusal end, and in the slit between draw point inserts the binding post pressing plate and descends in flakes, and its conventional zigzag occlusal end is withheld on the pressing plate of terminals, both clamp in opposite directions, be cemented on the pressing plate of binding post, constitute stable and firm force structure and reliable electrical connection, thereby avoided existing conventional crocodile clip clamping dynamics not enough, caducous deficiency, fundamentally stopped the accident open circuit problem in secondary current loop, for secondary CT loop provides a kind of safety, " short circuit " connection threatens staff's life security that assurance is provided for avoiding forming high-voltage discharge reliably;
2. it is simple for structure, and operation principle is simple, and intuitive is strong, and is not fragile in the work.
Description of drawings
Fig. 1 is the electrical block diagram in secondary current loop;
Fig. 2 is the structural representation of the special-purpose short-term folder of the utility model;
Fig. 3 be special-purpose short-term folder draw point occlusal end insert the binding post pressing plate with time in flakes between the slit in schematic diagram.
I among the figure
1Be primary current, I
2Be secondary current, CT is a current transformer, and A, B are secondary current circuit connection terminal, and L1, L2 are the load in secondary current loop;
1 is crocodile clip, and 2 is conventional zigzag occlusal end, and 3 is draw point formula occlusal end, and 4 is hinge, and 5 for connecting lead, and 6 is insulating sleeve, and 7 is the binding post pressing plate, 8 be under the binding post in flakes, 9 is the binding post housing pin, 10 is the secondary current return wire.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Among Fig. 1, high pressure primary current I
1Be transformed into secondary current I by current transformer CT
2, for uses such as relaying protection, measurements.Load L1, the L2 of protections at different levels, measurement is connected in the secondary current loop, and the junction in current transformer CT and secondary current loop is provided with binding post A and B.
From the angle that is electrically connected, the secondary current loop must guarantee the continuity that it is electrically connected, and must not " open a way ".Otherwise, in case " open circuit " phenomenon (being usually said " disconnection ") appears in the secondary current loop, will in the secondary current loop, produce high voltage, the person and device security are brought threat/injury.
In actual motion and maintenance/maintenance work; " short circuit " that is electrically connected at terminal A, B place (promptly being electrically connected); can guarantee the continuity in its secondary current loop; can satisfy simultaneously that must not " open a way " in the secondary current loop and (being the right side at terminal A, B among the figure) protections at different levels thereafter, load L1, the L2 of measurement are withdrawed from " online " state, the double requirements of carrying out various tests, replacing or other maintenance/maintenance works.
Among Fig. 2, the special-purpose short-term folder in this transformation and distribution system secondary CT loop comprises the crocodile clip 1 with two occlusal end, and an occlusal end of its crocodile clip is a draw point formula occlusal end 3, and another occlusal end is conventional zigzag occlusal end 2.
Aforesaid draw point is taper, oblique cone type or wedge shape draw point.
Play draw point formula occlusal end 3 and another conventional zigzag occlusal end 2, under the effect that is installed in the spring (not shown) on the hinge 4, clamp contact/interlock in opposite directions.
The tail end of described crocodile clip is provided with and connects lead 5, connects lead two crocodile clips are connected as one, and constitutes electrical connection.
Owing to be provided with insulating sleeve 6 at the rear portion of crocodile clip, the standard operation voltage that adds the secondary current loop is 100V, so can be affectedly bashful directly that crocodile clip carries out associative operation and entail dangers to operator's safety not with hand fully.
Among Fig. 3, the pressing plate 7 of conventional binding post be plugged with down secondary circuit in flakes between 8 be connected lead 10, pressing plate with down in flakes under the effect of binding post housing pin 9 the clamping secondary circuit be connected lead, guarantee the effect of its electrical connection.
Owing to connect the side that lead 10 is positioned at housing pin; pressing plate and can constitute down as shown in the figure oblique three-legged structure between in flakes usually then; promptly at the opposite side of the housing pin relative with connecting lead, pressing plate and gap space that down can an oblique triangular shape of existence between in flakes.
So in the gap space between draw point inserts pressing plate and descends in flakes, in the time can not entering again, draw point itself has been to be in pressing plate and the following stress that in flakes it is applied clamping force, unclamp crocodile clip this moment again, its conventional zigzag occlusal end (not shown) can be withheld on pressing plate, under the effect that is installed in the spring on the hinge, draw point occlusal end and conventional zigzag occlusal end clamp in opposite directions, to clamping force of short-term folder, two power combine, it is solid to make short-term clip, be cemented on the pressing plate of binding post difficult drop-off, constituted stable and firm force structure and reliable electrical connection.
The technical program is improvement development and coming on the basis of traditional crocodile clip, owing to adopted said structure, in actual at the scene the use, with the lead of general strength short-term folder, the short-term folder is become flexible or comes off.
Simultaneously, because the maximum current limit in secondary current loop is in 5A, with the contact point of the contact point of draw point and tooth and binding post pressing plate with the contact area time in flakes, can guarantee that fully the contact of current circuit is reliable.
Owing to adopted technique scheme, both guaranteed " short circuit " effect in secondary current loop, be difficult for slippage again; Can guarantee " short circuit " effect in secondary CT loop reliably, under the situation that does not have the special-purpose current testing terminal of setting/outfit, for providing safe and reliable " short circuit ", secondary CT loop connects, work with level secondary current loop, convenient back, for avoiding unexpected slippage, form high-voltage discharge and threaten staff's life that safety assurance is provided because of crocodile clip.
The utility model can be widely used in the operation and the maintenance field of transformation and distribution system secondary circuit.
Claims (5)
1. the special-purpose short-term folder in transformation and distribution system secondary CT loop comprises the crocodile clip with two occlusal end, and it is characterized in that: an occlusal end of described crocodile clip is a draw point formula occlusal end, and another occlusal end is conventional zigzag occlusal end.
2. according to the special-purpose short-term folder in the described transformation and distribution system secondary of claim 1 CT loop, it is characterized in that described draw point is taper, oblique cone type or wedge shape draw point.
3. according to the special-purpose short-term folder in the described transformation and distribution system secondary of claim 1 CT loop, it is characterized in that described draw point formula occlusal end and another conventional zigzag occlusal end, under the effect that is installed in the spring on the hinge, clamp contact/interlock in opposite directions.
4. according to the special-purpose short-term folder in the described transformation and distribution system secondary of claim 1 CT loop, in the slit between it is characterized in that described draw point formula occlusal end insertion binding post pressing plate and descending in flakes, described conventional zigzag occlusal end is withheld on the pressing plate of terminals, both clamp in opposite directions, be cemented on the pressing plate of binding post, constitute stable and firm force structure and reliable electrical connection.
5. according to the special-purpose short-term folder in the described transformation and distribution system secondary of claim 1 CT loop, it is characterized in that the tail end of described crocodile clip is provided with the connection lead, connect lead two crocodile clips are connected as one, constitute electrical connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200734194U CN201435455Y (en) | 2009-06-05 | 2009-06-05 | Special stub clip for secondary CT loop in power transformation and distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200734194U CN201435455Y (en) | 2009-06-05 | 2009-06-05 | Special stub clip for secondary CT loop in power transformation and distribution system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201435455Y true CN201435455Y (en) | 2010-03-31 |
Family
ID=42054269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200734194U Expired - Lifetime CN201435455Y (en) | 2009-06-05 | 2009-06-05 | Special stub clip for secondary CT loop in power transformation and distribution system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201435455Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022754A (en) * | 2012-12-03 | 2013-04-03 | 四川省电力公司资阳公司 | Anti-slip alligator clamp |
| CN104698420A (en) * | 2013-12-09 | 2015-06-10 | 国家电网公司 | Wiring device |
| CN106981738A (en) * | 2017-03-29 | 2017-07-25 | 山东钢铁集团日照有限公司 | A kind of multi-purpose maintenance temporary source plug |
| CN108462375A (en) * | 2018-04-11 | 2018-08-28 | 上海空间电源研究所 | Power flow concentration device for improving power-supply controller of electric power-mass ratio |
| CN108493066A (en) * | 2018-05-30 | 2018-09-04 | 乐清市高科环保电子有限公司 | A kind of conductive structure, connection unit and breaker |
-
2009
- 2009-06-05 CN CN2009200734194U patent/CN201435455Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022754A (en) * | 2012-12-03 | 2013-04-03 | 四川省电力公司资阳公司 | Anti-slip alligator clamp |
| CN104698420A (en) * | 2013-12-09 | 2015-06-10 | 国家电网公司 | Wiring device |
| CN106981738A (en) * | 2017-03-29 | 2017-07-25 | 山东钢铁集团日照有限公司 | A kind of multi-purpose maintenance temporary source plug |
| CN108462375A (en) * | 2018-04-11 | 2018-08-28 | 上海空间电源研究所 | Power flow concentration device for improving power-supply controller of electric power-mass ratio |
| CN108493066A (en) * | 2018-05-30 | 2018-09-04 | 乐清市高科环保电子有限公司 | A kind of conductive structure, connection unit and breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI ELECTRIC POWER CORP. Free format text: FORMER OWNER: SHANGHAI ULTRA-HV TRANSMISSION + DISTRIBUTION COMPANY, SHANGHAI ELECTRIC POWER C Effective date: 20110519 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 200063 NO. 600, WUNING ROAD, PUTUO DISTRICT, SHANGHAI TO: 200122 NO. 1122, YUANSHEN ROAD, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110519 Address after: 200122, 1122 deep road, Shanghai Patentee after: Shanghai Electric Power Corporation Address before: 200063 No. 600, Wuning Road, Shanghai, Putuo District Patentee before: Shanghai Ultra-HV Transmission & Distribution Company, Shanghai Electric Power C |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100331 |