CN113380576A - Solid-sealed polar pole of draw-out type vacuum circuit breaker - Google Patents
Solid-sealed polar pole of draw-out type vacuum circuit breaker Download PDFInfo
- Publication number
- CN113380576A CN113380576A CN202110784160.XA CN202110784160A CN113380576A CN 113380576 A CN113380576 A CN 113380576A CN 202110784160 A CN202110784160 A CN 202110784160A CN 113380576 A CN113380576 A CN 113380576A
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- China
- Prior art keywords
- circuit breaker
- main loop
- current transformer
- vacuum
- pole
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
Abstract
The invention discloses an embedded pole of a draw-out vacuum circuit breaker, which comprises an embedded pole body arranged on a breaker frame, wherein the embedded pole body comprises a pole body and a vacuum arc-extinguishing chamber, a main loop conductor penetrates through the pole body and then penetrates into the vacuum arc-extinguishing chamber, an annular iron core of a current transformer is sleeved on the outer side of the main loop conductor, an output winding of the current transformer is led out through a fixing bolt base arranged on the outer side of the pole body and then is connected with a control terminal through a wire, and the current transformer is used for acquiring the current change of the main loop after the main loop is switched on and analyzing the current change by using the control terminal so as to display an electric quantity signal, an overcurrent trip signal and an output alarm signal. The solid-sealed polar pole of the drawout vacuum circuit breaker adopting the structure is integrally processed, and has the advantages of simple structure, small volume and the like; and only rely on air insulation, the return circuit greatly reduces multiple contact, avoids many laps, has reduced the contact resistance that a plurality of devices are connected, and the reliability is strong.
Description
Technical Field
The invention relates to a circuit breaker technology, in particular to a solid-sealed polar pole of a draw-out type vacuum circuit breaker.
Background
The vacuum circuit breaker is named because arc extinguishing media and insulating media of contact gaps after arc extinguishing are high vacuum; the arc extinguishing device has the advantages of small volume, light weight, suitability for frequent operation and no need of maintenance for arc extinguishing, and is relatively popularized in power distribution networks.
Vacuum circuit breakers on the market at present include VS1-12 type circuit breaker, VD4-12 type circuit breaker, VEP-12 type circuit breaker, 3AE-12 type circuit breaker, ZN118-12 type circuit breaker and the like. The circuit breakers all belong to single-row unit circuit breakers, do not have a signal processing function, and need to rely on external signal acquisition and control, so that the control function of opening and closing actions is realized. Therefore, the following disadvantages exist: 1. the body shape is large; 2. after the switch contacts are connected, the switch contacts are formed by copper bar lapping, contact points are more, the resistance of a main loop is increased due to overhigh temperature rise, and the insulation performance of the insulating material of the main loop is gradually reduced due to the fact that the switch contacts run for a long time along with certain temperature rise.
Disclosure of Invention
The invention aims to provide a solid-sealed polar pole of a drawout vacuum circuit breaker, which is integrally processed and has the advantages of simple structure, small volume and the like; and only rely on air insulation, the return circuit greatly reduces multiple contact, avoids many laps, has reduced the contact resistance that a plurality of devices are connected, and the reliability is strong.
In order to achieve the purpose, the invention provides an embedded pole of a draw-out type vacuum circuit breaker, which comprises an embedded pole body arranged on a breaker frame, wherein the embedded pole body comprises a pole body and a vacuum arc-extinguishing chamber which are sequentially arranged from top to bottom, a main loop conductor penetrates through the pole body and then penetrates into the vacuum arc-extinguishing chamber, an annular iron core of a current transformer is sleeved on the outer side of the main loop conductor, an output winding of the current transformer is led out through a fixing bolt base arranged on the outer side of the pole body and then is connected with a control terminal through a wire, and the current transformer is used for acquiring the current change of a main loop after the main loop is switched on and analyzing the current change by using the control terminal so as to display an electric quantity signal, an overcurrent trip signal and an output alarm signal.
Preferably, a fixed contact and a movable contact are sequentially arranged inside the vacuum arc-extinguishing chamber from top to bottom, the top end of the fixed contact is electrically connected with one end of the main loop conductor, and the other end of the main loop conductor sequentially penetrates through the vacuum arc-extinguishing chamber, the annular iron core of the current transformer and the pole body;
the moving contact is arranged below the fixed contact, a conductive flexible connection is arranged at one end, far away from the fixed contact, of the moving contact, and the outer side of the moving contact is connected with the corrugated pipe.
Preferably, the inner wall of the vacuum arc-extinguishing chamber is adhered with rubber coating, and the outer wall of the vacuum arc-extinguishing chamber is fixed with a fixed insert.
Preferably, the main circuit conductor, the current transformer and the vacuum interrupter are encapsulated by an APG pressing process.
Preferably, the current transformer is encapsulated outside the main circuit conductor and inside the pole body via an insulating resin.
Preferably, at least two current transformers are sleeved outside the main loop conductor.
Preferably, the current transformer is a ring current transformer.
Preferably, the annular iron core of the current transformer is an amorphous iron core.
Therefore, the solid-sealed polar pole of the drawout vacuum circuit breaker adopting the structure is integrally processed, and has the advantages of simple structure, small volume and the like; and only rely on air insulation, the return circuit greatly reduces multiple contact, avoids many laps, has reduced the contact resistance that a plurality of devices are connected, and the reliability is strong.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a longitudinal sectional view of a sealed pole of a drawout vacuum circuit breaker according to an embodiment of the present invention;
fig. 2 is a perspective view of a sealed pole of a drawout vacuum circuit breaker according to an embodiment of the present invention;
fig. 3 is a front view of a sealed pole of a drawout vacuum circuit breaker according to an embodiment of the present invention;
fig. 4 is a top view of a sealed pole of a drawout vacuum circuit breaker according to an embodiment of the present invention;
fig. 5 is a bottom view of a sealed pole of a drawout vacuum circuit breaker according to an embodiment of the present invention.
Wherein: 1. a main loop conductor; 2. a pole body; 3. a fixing bolt base; 4. an annular iron core of the current transformer; 5. static contact; 6. a moving contact; 7. encapsulating; 8. a bellows; 9. conducting flexible connection; 10. a vacuum arc-extinguishing chamber; 11. and fixing the insert.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed implementation and the specific operation process are provided, but the protection scope of the present invention is not limited to the present embodiment.
Fig. 1 is a longitudinal sectional view of a sealed pole of a drawout vacuum circuit breaker according to an embodiment of the present invention;
fig. 2 is a perspective view of a sealed pole of a drawout vacuum circuit breaker according to an embodiment of the present invention; fig. 3 is a front view of a sealed pole of a drawout vacuum circuit breaker according to an embodiment of the present invention; fig. 4 is a top view of a sealed pole of a drawout vacuum circuit breaker according to an embodiment of the present invention; fig. 5 is a bottom view of an embedded pole of a drawout vacuum circuit breaker according to an embodiment of the present invention, and as shown in the figure, the structure of the present invention includes an embedded pole body 2 installed on a breaker frame, the embedded pole body 2 includes a pole body 2 and a vacuum arc-extinguishing chamber 10 sequentially arranged from top to bottom, a main loop conductor 1 penetrates through the pole body 2 and penetrates into the vacuum arc-extinguishing chamber 10, a ring-shaped iron core 4 of a current transformer is sleeved outside the main loop conductor 1, the main loop conductor 1 is placed at a central position of the ring-shaped iron core 4 of the current transformer, so as to ensure reliable collection of current change of the main loop, an output winding of the current transformer is led out through a fixing bolt base 3 arranged outside the pole body 2 and then connected with a control terminal through a wire, so as to obtain current change of the main loop through the current transformer and utilize the control terminal after the main loop is connected (at this time, moving and static contacts are contacted under the action of an operating mechanism) Thereby analysis electric current changes and shows electric quantity signal, overcurrent trip signal and output alarm signal, has integrated signal processing function, and the practicality is stronger.
Preferably, a fixed contact 5 and a movable contact 6 are sequentially arranged inside the vacuum arc-extinguishing chamber 10 from top to bottom, the top end of the fixed contact 5 is electrically connected with one end of the main loop conductor 1, and the other end of the main loop conductor 1 sequentially penetrates through the vacuum arc-extinguishing chamber 10, the annular iron core 4 of the current transformer and the pole body 2;
the moving contact 6 is arranged below the fixed contact 5, a conductive flexible connection 9 is arranged at one end, far away from the fixed contact 5, of the moving contact 6, and the outer side of the moving contact 6 is connected with a corrugated pipe 8.
Preferably, the inner wall of the vacuum arc-extinguishing chamber 10 is attached with an encapsulation 7, and the outer wall of the vacuum arc-extinguishing chamber 10 is fixed with a fixed insert 11.
Preferably, the main circuit conductor 1, the current transformer and the vacuum interrupter 10 are encapsulated by an APG pressing process, that is, the main circuit conductor 1, the current transformer and the vacuum interrupter 10 are combined to form a module unit, so that the installation space of the components is greatly reduced, and the size of the device is reduced.
Preferably, the current transformer is encapsulated outside the main circuit conductor 1 and inside the pole body 2 via an insulating resin.
Preferably, at least two current transformers are sleeved outside the main loop conductor 1. The current transformer is a ring current transformer. The annular iron core 4 of the current transformer is an amorphous iron core.
Therefore, the solid-sealed polar pole of the drawout vacuum circuit breaker adopting the structure is integrally processed, and has the advantages of simple structure, small volume and the like; and only rely on air insulation, the return circuit greatly reduces multiple contact, avoids many laps, has reduced the contact resistance that a plurality of devices are connected, and the reliability is strong.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.
Claims (8)
1. The utility model provides a pull-out type vacuum circuit breaker's solid utmost point post that seals, is including installing the solid utmost point post body that seals in the circuit breaker frame, gu seal utmost point post body and include by utmost point post body and the vacuum interrupter who arranges in proper order from the top down, the main loop electric conductor passes penetrate behind the utmost point post body inside the vacuum interrupter, its characterized in that: the outer side of the main loop conductor is sleeved with an annular iron core of a current transformer, an output winding of the current transformer is led out through a fixing bolt base arranged on the outer side of the pole body and then is connected with a control terminal through a wire, and the current transformer is used for acquiring current change of the main loop after the main loop is connected and analyzing the current change through the control terminal so as to display an electric quantity signal, an overcurrent trip signal and an output alarm signal.
2. The embedded pole of the drawout vacuum circuit breaker as claimed in claim 1, wherein: a fixed contact and a movable contact are sequentially arranged in the vacuum arc extinguish chamber from top to bottom, the top end of the fixed contact is electrically connected with one end of the main loop conductor, and the other end of the main loop conductor sequentially penetrates through the vacuum arc extinguish chamber, the annular iron core of the current transformer and the pole body;
the moving contact is arranged below the fixed contact, a conductive flexible connection is arranged at one end, far away from the fixed contact, of the moving contact, and the outer side of the moving contact is connected with the corrugated pipe.
3. The embedded pole of the drawout vacuum circuit breaker according to claim 2, wherein: the inner wall of the vacuum arc-extinguishing chamber is attached with rubber coating, and the outer wall of the vacuum arc-extinguishing chamber is fixed with a fixed insert.
4. The embedded pole of the drawout vacuum circuit breaker as claimed in claim 1, wherein: and the main loop conductor, the current transformer and the vacuum arc-extinguishing chamber are encapsulated by an APG pressing process.
5. The embedded pole of the drawout vacuum circuit breaker as claimed in claim 4, wherein: the current transformer is encapsulated outside the main loop conductor and inside the pole body through insulating resin.
6. The embedded pole of the drawout vacuum circuit breaker as claimed in claim 1, wherein: at least two current transformers are sleeved on the outer side of the main loop conductor.
7. The embedded pole of the drawout vacuum circuit breaker as claimed in claim 1, wherein: the current transformer is a ring current transformer.
8. The embedded pole of the drawout vacuum circuit breaker as claimed in claim 1, wherein: the annular iron core of the current transformer is an amorphous iron core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110784160.XA CN113380576A (en) | 2021-07-12 | 2021-07-12 | Solid-sealed polar pole of draw-out type vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110784160.XA CN113380576A (en) | 2021-07-12 | 2021-07-12 | Solid-sealed polar pole of draw-out type vacuum circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113380576A true CN113380576A (en) | 2021-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110784160.XA Pending CN113380576A (en) | 2021-07-12 | 2021-07-12 | Solid-sealed polar pole of draw-out type vacuum circuit breaker |
Country Status (1)
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| CN (1) | CN113380576A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109065405A (en) * | 2018-09-25 | 2018-12-21 | 江苏南瑞帕威尔电气有限公司 | A kind of pole |
-
2021
- 2021-07-12 CN CN202110784160.XA patent/CN113380576A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109065405A (en) * | 2018-09-25 | 2018-12-21 | 江苏南瑞帕威尔电气有限公司 | A kind of pole |
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