CN201655646U - High-voltage isolating switch capable of cutting off induced current - Google Patents
High-voltage isolating switch capable of cutting off induced current Download PDFInfo
- Publication number
- CN201655646U CN201655646U CN2010201383959U CN201020138395U CN201655646U CN 201655646 U CN201655646 U CN 201655646U CN 2010201383959 U CN2010201383959 U CN 2010201383959U CN 201020138395 U CN201020138395 U CN 201020138395U CN 201655646 U CN201655646 U CN 201655646U
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- main ground
- ground connection
- contact
- fixed contact
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Abstract
The utility model discloses a high-voltage isolating switch capable of cutting off induced current. An auxiliary ground loop is connected with the main ground loop of the isolating switch in parallel and comprises an auxiliary moving contact which is attached on a main ground cutter bar, an auxiliary fixed contact which is installed on the fixed contact of the isolating switch, and a vacuum load switch which is electrically connected with the auxiliary moving contact through a connecting cable. The auxiliary moving contact is in parallel with the main ground moving contact. The front end of the auxiliary moving contact extends axially and forward and protrudes the front end of the main ground moving contact. The auxiliary fixed contact is installed above a main ground fixed contact and is a U-shaped structure formed by tubular bodies or bar bodies and the diameter of the auxiliary fixed contact is larger than the diameter of the main ground fixed contact. The vacuum load switch is connected with a main ground switch moving contact driving mechanism through a linkage mechanism in a driving way. The utility model has the advantages that the structure is simple, the installation and the maintenance are convenient, the safety and the reliability of the high-voltage switch are improved, the potential safety hazards caused by the induced current are voided and the function of cutting off the induced current is realized.
Description
Technical field
The utility model belongs to the high-voltage switch gear technical field, exactly relates to a kind of faradic high voltage isolator that cuts off.
Background technology
Need in existing electric line often high voltage electric equipments such as high voltage bus, isolating switch, circuit breaker to be safeguarded and overhauled that for guaranteeing maintainer's safety, the high voltage electric equipment in the circuit must effective grounding.At present, along with development of social productivity, the electric line of electric power system is more and more nervous, and in order to reduce the transmission of electricity corridor to appropriation of land, the power transmission and distribution circuit in the many areas of China has adopted joint uses dual loop transmission line.If but when a dual loop transmission line loop wherein stopped transport repair and maintenance, the high voltage power transmission loop that another does not cut off the power supply will produce a bigger category-B capacitive character and inductive induced current by coupling on the circuit of stopping transport, this induced electricity fails to be convened for lack of a quorum and form very big electric arc when the dynamic and static contact of earthed switch contacts between dynamic and static contact, the dynamic and static contact of easy ablation earthed switch, thereby reduce the ground connection performance of earthed switch, for potential safety hazard is buried in the maintenance and the maintenance of the high-voltage electrical apparatus in the circuit.
Summary of the invention
The purpose of this utility model is at above-mentioned defective, provides a kind of can closing to close and cut off faradic high voltage isolator in the dual loop transmission line, to improve the fail safe and the reliability of earthed switch.
The technical solution of the utility model is: a kind ofly cut off faradic high voltage isolator, comprise pedestal, it is moving by the insulation porcelain knob isolating switch to be installed on the pedestal, fixed contact, on static contact isolation switch, be connected with main grounded circuit, described main grounded circuit comprises main ground connection knife bar that is installed on the pedestal and the main ground connection fixed contact that is fixed on the static contact isolation switch, be parallel with an auxiliary earth loop on described main grounded circuit, this auxiliary earth loop comprises the auxiliary moving contact that is attached on the main ground connection knife bar, the vacuum load switch that is installed in the auxiliary fixed contact on the static contact isolation switch and is electrically connected with auxiliary moving contact by stube cable; Described auxiliary moving contact is parallel with the axis direction of main ground connection moving contact, and the front end of auxiliary moving contact axially extends the front end of outstanding main ground connection moving contact forward; Described auxiliary fixed contact is along being parallel to the top that main ground connection moving contact direction is installed in main ground connection fixed contact, and this auxiliary fixed contact is made of the U-shaped structure that tubular body or clava surround, and its diameter is greater than main ground connection fixed contact; Described vacuum load switch is in transmission connection by link gear and main earthed switch moving contact driving mechanism.
Described main ground connection knife bar is that single armed is directly swung structure, and described auxiliary moving contact is fixedly mounted on the main ground connection knife bar by insulating support, described auxiliary fixed contact be fixed on main ground connection fixed contact near.
Of the present utility model simple in structure, convenient for installation and maintenance; It in use; drive mechanism master's ground connection knife bar of main grounded circuit is upset upwards; because auxiliary moving contact is pressed on main ground connection knife bar and the front end of outstanding main ground connection knife bar; thereby the dynamic/static contact in auxiliary earth loop at first contacts; then thereby the vacuum combination switch is owing to be switched on the driving mechanism interlock that goes out grounded circuit; realize auxiliary earth loop ground connection; main at last ground connection is moving; the fixed contact contact; the auxiliary earth loop that induced current in the dual loop transmission line is at first contacted cuts off; thereby protected main grounded circuit safety; ground connection smoothly; improved the fail safe of high-voltage switch gear; reliability; avoid the potential safety hazard that induced current produced, realized cutting off faradic function.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is that K among Fig. 1 is to view;
Fig. 3 is that N among Fig. 2 is to view;
Fig. 4 is for removing the vertical view behind the insulation porcelain knob among Fig. 1.
Embodiment
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, present embodiment is to be example with existing GW27 Series Switch-disconnector, makes improvements.This isolating switch mainly comprises pedestal 1, the dynamic and static contact 2,3 of single-stage isolating switch is installed by the insulation porcelain knob on the pedestal 1, the fixed contact 12 of main earthed switch is installed on static contact isolation switch 3, be equipped with main ground connection knife bar 6 on pedestal 1, this main ground connection knife bar 6 is in transmission connection with driving mechanism by connecting lever 5 and connecting rod 4.On the sidewall of pedestal 1, also be fixed with a vacuum load switch 10, on main ground connection knife bar 6, be fixed with auxiliary moving contact 8 in the same way by insulating support 7, the axially parallel of auxiliary moving contact 8 and main ground connection knife bar 6, the front end edge master ground connection knife bar 6 of auxiliary moving contact 8 extends the end of outstanding main ground connection knife bar 6 forward, the tail end of auxiliary moving contact 8 is connected with vacuum load switch 10 by stube cable 9, the action power shaft of vacuum load switch 10 connects with the transmission mechanism of earthed switch by connecting rod 11, auxiliary fixed contact 13 is installed above the fixed contact 12 of main earthed switch, should surround by bend pipe or bar by auxiliary fixed contact 13, its structure that roughly takes the shape of the letter U, the two ends of auxiliary fixed contact 13 are by on the fixed contact 3 that is bolted to isolating switch, and its diameter is greater than main ground connection fixed contact 12.Vacuum load switch 10 and the auxiliary moving contact 8 and the auxiliary fixed contact 13 common auxiliary earth loops of forming that are attached thereto by stube cable 9.
Main ground connection knife bar in the present embodiment is that single armed is directly swung structure, after being rotated in place, it also has a upwards process of action insertion fixed contact when ground connection, thereby when earthed switch closes a floodgate, drive mechanism master's ground connection knife bar 6 rotates up, but after main ground connection knife bar 6 is rotated in place, this moment, main ground connection knife bar 6 did not contact with main ground connection fixed contact 12, but because the end of auxiliary moving contact 8 outstanding main ground connection knife bars 6, and auxiliary fixed contact 13 is greater than main ground connection fixed contact 12, thereby auxiliary moving contact 8 at first contacts with auxiliary fixed contact 13, driving mechanism continues action, make vacuum load switch 10 conductings by link gear, induced current in the dual loop transmission line is by auxiliary fixed contact 13, auxiliary moving contact 8, stube cable 9 is input to and realizes arc extinguishing ground connection in the vacuum load switch 10, driving mechanism continues action, make main ground connection knife bar 6 upwards insert contact with it in the main ground connection fixed contact 12, finish landing operation.At this moment, induced current is cut off by the auxiliary earth loop, can not carry generation electric arc between the dynamic/static contact of main earthed switch, thereby has improved safety, the reliability of high pressure isolation earthing switch.
The utility model is by being arranged in parallel an auxiliary earth loop on the main grounded circuit of high-voltage switch gear, by the faradic function in auxiliary moving contact, auxiliary fixed contact and the vacuum load switch realization cut-out dual loop transmission line, not only simple in structure, and it will assist moving contact and main ground connection knife bar to realize that mechanical linkage can simplified control circuit, installation and use are all very convenient, can improve the integrated level of high voltage isolator or earthed switch, be convenient to safeguard, and reduced the floor space in transmission ﹠ distribution power stations greatly.
Claims (2)
1. one kind can be cut off faradic high voltage isolator, comprise pedestal, it is moving by the insulation porcelain knob isolating switch to be installed on the pedestal, fixed contact, on static contact isolation switch, be connected with main grounded circuit, described main grounded circuit comprises main ground connection knife bar that is installed on the pedestal and the main ground connection fixed contact that is fixed on the static contact isolation switch, it is characterized in that, be parallel with an auxiliary earth loop on described main grounded circuit, this auxiliary earth loop comprises the auxiliary moving contact that is attached on the main ground connection knife bar, the vacuum load switch that is installed in the auxiliary fixed contact on the static contact isolation switch and is electrically connected with auxiliary moving contact by stube cable; Described auxiliary moving contact is parallel with the axis direction of main ground connection moving contact, and the front end of auxiliary moving contact axially extends the front end of outstanding main ground connection moving contact forward; Described auxiliary fixed contact edge is parallel to the top that main ground connection moving contact direction is installed in main ground connection fixed contact, the U-shaped structure that this auxiliary fixed contact is surrounded by tubular body or clava, and its diameter is greater than main ground connection fixed contact; Described vacuum load switch is in transmission connection by link gear and main earthed switch moving contact driving mechanism.
2. according to claim 1ly cut off faradic high voltage isolator, it is characterized in that, described main ground connection knife bar is that single armed is directly swung structure, and described auxiliary moving contact is fixedly mounted on the main ground connection knife bar by insulating support, described auxiliary fixed contact be fixed on main ground connection fixed contact near.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201383959U CN201655646U (en) | 2010-03-23 | 2010-03-23 | High-voltage isolating switch capable of cutting off induced current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201383959U CN201655646U (en) | 2010-03-23 | 2010-03-23 | High-voltage isolating switch capable of cutting off induced current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201655646U true CN201655646U (en) | 2010-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201383959U Expired - Lifetime CN201655646U (en) | 2010-03-23 | 2010-03-23 | High-voltage isolating switch capable of cutting off induced current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201655646U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110326079A (en) * | 2017-02-22 | 2019-10-11 | 西门子股份公司 | There are two the switching devices of disconnecting switch and power switch for tool |
| CN111986949A (en) * | 2020-07-22 | 2020-11-24 | 国网内蒙古东部电力有限公司电力科学研究院 | Isolating load switch |
-
2010
- 2010-03-23 CN CN2010201383959U patent/CN201655646U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110326079A (en) * | 2017-02-22 | 2019-10-11 | 西门子股份公司 | There are two the switching devices of disconnecting switch and power switch for tool |
| CN110326079B (en) * | 2017-02-22 | 2021-10-22 | 西门子股份公司 | Switching device with two isolating switches and power switch |
| CN111986949A (en) * | 2020-07-22 | 2020-11-24 | 国网内蒙古东部电力有限公司电力科学研究院 | Isolating load switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101124 |
|
| CX01 | Expiry of patent term |