CN203933003U - A kind of compact main transformer neutral point rod gap lightning arrester and ground connection complete set of protective apparatus - Google Patents
A kind of compact main transformer neutral point rod gap lightning arrester and ground connection complete set of protective apparatus Download PDFInfo
- Publication number
- CN203933003U CN203933003U CN201420251514.XU CN201420251514U CN203933003U CN 203933003 U CN203933003 U CN 203933003U CN 201420251514 U CN201420251514 U CN 201420251514U CN 203933003 U CN203933003 U CN 203933003U
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- Prior art keywords
- ground
- ground cutter
- lightning arrester
- cutter
- transformer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
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Abstract
The utility model relates to a kind of compact main transformer neutral point rod gap lightning arrester and ground connection complete set of protective apparatus, comprise lightning arrester unit in parallel, excellent gap element and grounding switch unit, it is characterized in that: described grounding switch unit comprises ground cutter and the ground cutter current transformer that can match, ground cutter fixed contact is arranged on the upper terminal of lightning arrester, ground cutter contact tube is connected with ground swivel shaft mechanical by insulator, and ground cutter contact tube is electrically connected to base by ground cutter current transformer; While being unworthy of ground cutter current transformer, ground cutter contact tube is directly connected with ground swivel axle, cancels ground cutter insulator.The whole two pillar mounting structures that adopt, adopt the phase structure of circuit ground cutter to replace traditional GW8, GW13 ground knife structure, have improved the standardization level of product.The installation of ground cutter current transformer does not need to increase base length.The compact conformation cost of the complete sets of equipment is low, has reduced the cost of the management of product.
Description
Technical field
The utility model relates to a kind of protection equipment for transformer, particularly a kind of compact main transformer neutral point rod gap lightning arrester and ground connection complete set of protective apparatus.
Background technology
110kV, 220kV are the main electric pressures of supply network, due to relay protection setting configuration and prevent the requirement of the aspects such as communication interference, in order to limit single-phase short circuit current, wherein have some transformers to adopt isolated neutral mode.Under this operational mode; because thunderbolt, single-phase grounding fault etc. can cause neutral point overvoltage; and transformer is graded insulation mostly, so the insulation of overvoltage centering point causes very large threat, must protective device Accident prevention be set to it and occur.
In current main transformer neutral point rod gap lightning arrester and ground connection complete set of protective apparatus product; adopt lightning arrester unit in parallel, excellent gap element and grounding switch unit; in use; main transformer neutral point ground cutter is in order to meet the requirement of measuring main transformer zero-sequence current; require ground cutter conducting rod insulation against ground, the pattern of ground cutter has a significant impact the physical dimension of complete sets of products and manufacturing cost.Mainly contain at present two kinds of ground cutter patterns:
The first adopts GW13 type ground knife structure, and as shown in Figure 1, for meeting the measurement requirement of earth current, its ground connection knife bar 8 and ground connection knife bar 9 are supported by post insulator 13 and post insulator 14 respectively, and insulation against ground, by instrument transformer 7 ground connection.GW13 type ground knife structure is more complicated, and two post insulators 13,14 all need rotation, needs independent installation, and installation site is large, and manufacturing cost is also high.
The second is GW8 type ground knife structure, as shown in Figure 2, a stainless steel bar utmost point 3 of rod gap element is arranged on the upper end of lightning arrester 2, ground cutter fixed contact 8 also can be arranged on lightning arrester 2 upper ends, structure is comparatively compact, but the ground cutter of GW8 type need to increase post insulator 15 and an insulated connecting rod 16, to meet the requirement of measuring electric current.
Strategic point cutter current transformer not during the current more than 90% neutral point the complete sets of equipment supply of material requires because main transformer this in neutral point outlet casing tube raises seat, neutral point current instrument transformer is housed.Only less than 10% complete sets of products, require to provide ground cutter current transformer, but the requirement of this electric insulation causes the variation of ground cutter mechanical structure.Main transformer neutral point ground cutter is in order to meet the requirement of measuring main transformer zero-sequence current, require ground cutter conducting rod insulation against ground, the insulation measures that GW13 and GW8 type ground cutter adopt all makes mechanical structure and the mounting means of ground cutter that larger variation has occurred, the simple structure that therefore can not adopt circuit ground cutter, causes the variation of product form.Overall volume is large.
In addition, in Fig. 1, adopt 10kV line current instrument transformer to use as neutral point current instrument transformer, all insulation against ground of two ends of primary current winding outlet, highly high, require independent installation site need increase base length.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of compact conformation, low cost of manufacture and installs takes up an area little compact main transformer neutral point rod gap lightning arrester and ground connection complete set of protective apparatus.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of compact main transformer neutral point rod gap lightning arrester and ground connection complete set of protective apparatus, comprise the lightning arrester unit being arranged in parallel on base, excellent gap element and grounding switch unit, it is characterized in that: lightning arrester unit, comprise lightning arrester, lightning arrester doubles as the insulating supporting of excellent gap element and grounding switch unit; Rod gap element comprises the first stainless steel bar utmost point, the second stainless steel bar utmost point, conductive pillar, gap current instrument transformer, the first stainless steel bar extremely level is arranged on the upper terminal of lightning arrester, the extremely corresponding conductive pillar upper end that is horizontally set on a side adjacent with lightning arrester unit of the second stainless steel bar, conductive pillar is electrically connected on base by gap current instrument transformer; Grounding switch unit is mainly ground cutter body, ground cutter body comprise ground cutter fixed contact, cutter conducting rod, swivel axle and ground cutter shaft operation connecting lever, ground cutter fixed contact is arranged on the upper terminal of lightning arrester; Described ground swivel axle is horizontally disposed with, and by the axis hole on base, is supported, and one end of ground swivel axle connects earthing conducting rod, and ground cutter conducting rod is electrically connected to base by soft whipping wire, and the other end of ground swivel axle connects ground cutter shaft operation connecting lever.
Preferably, described grounding switch unit can be equipped with ground cutter current transformer, ground cutter conducting rod by soft whipping wire, cutter current transformer be electrically connected to base; Ground cutter conducting rod is connected and fixed by ground cutter insulator and one end of ground swivel axle.
Preferably, described gap current instrument transformer and ground cutter current transformer are that punching current transformer is encapsulated in insulating sleeve, the two ends of the primary current wire of current transformer are connected on respectively on the metal end plate up and down of insulating sleeve, and the bottom plate of current transformer is fixed on base.
the utility model has the advantage of:the whole two pillar mounting structures that adopt, lightning arrester doubles as the insulating supporting of excellent gap and grounding switch unit; The utility model has overcome the inertial thinking of those skilled in the art when design, ground cutter insulator is located to the junction of ground cutter conducting rod and ground swivel axle, make the variation of electric requirement not affect mechanical supporting and drive mechanism, on the basis of insulating requirements that has met current measurement, simplified the mechanical structure of neutral point ground cutter, made the phase structure of circuit ground cutter be applicable to neutral point ground cutter; And circuit ground cutter does not need to measure earth current, bearing, connecting lever are not all had to insulating requirements, simple and reliable for structure.The utility model, when apolegamy ground cutter current transformer, has only increased ground cutter insulator at ground knife bar root, and mechanical support and drive mechanism do not become and be general with circuit ground cutter.With the comparison of GW8 type, saved post insulator and independent bearing pedestal, simplified product structure, can reduce the height of product simultaneously; With the comparison of GW13 type, ground cutter cost declines, and the base length of complete sets of products reduces.
In addition, in fact the one end due to neutral point current instrument transformer primary current winding in service is directly grounded, and its insulating requirements and the mode of connection can be simpler than line current instrument transformer.This patent has designed the instrument transformer that is exclusively used in neutral ground current measurement.Current transformer adopts the design that is applicable to earth current measuring characteristic, punching current mutual inductor coil is encapsulated in insulating sleeve, the two ends of the primary current wire of current transformer are connected on respectively on the metal end plate up and down of insulating sleeve, and the bottom plate of current transformer is fixed on base.The height of ground cutter current transformer is low, is arranged on the bottom base in excellent gap and does not affect excellent utmost point coverage over the ground, does not need to extend base length, has saved mounting base and earth connection, install and wiring all simple compared with the current transformer in Fig. 1.In the utility model, base length reduces 0.8 ~ 1.8 meter than the length of like product in the market, takes up an area littlely, lightweight, is convenient to transportation, installs.
Accompanying drawing explanation
Fig. 1 is for adopting the main transformer neutral point rod gap lightning arrester of GW13 type ground knife structure and the assembled protector structural representation of earthing.
Fig. 2 is for adopting main transformer neutral point rod gap lightning arrester and the ground connection complete set of protective apparatus structural representation of GW8 type ground cutter.
Fig. 3 is compact main transformer neutral point rod gap lightning arrester and the ground connection complete set of protective apparatus front view of the utility model the first execution mode.
Fig. 4 is compact main transformer neutral point rod gap lightning arrester and the ground connection complete set of protective apparatus end view of the utility model the first execution mode.
Fig. 5 is compact main transformer neutral point rod gap lightning arrester and the ground connection complete set of protective apparatus front view of another kind of execution mode in the utility model.
Fig. 6 is compact main transformer neutral point rod gap lightning arrester and the ground connection complete set of protective apparatus end view of another kind of execution mode in the utility model.
Embodiment
Fig. 3,4 shows compact main transformer neutral point rod gap lightning arrester and the ground connection complete set of protective apparatus of the utility model structure, and it comprises the lightning arrester unit being arranged in parallel on base 1, excellent gap element and grounding switch unit; Wherein:
Lightning arrester unit, comprises lightning arrester 2, and lightning arrester 2 doubles as the insulating supporting of excellent gap element and grounding switch unit;
Rod gap element comprises the first stainless steel bar utmost point 3, the second stainless steel bar utmost point 4, conductive pillar 5, gap current instrument transformer 6, the the first stainless steel bar utmost point 3 levels are arranged on the upper terminal of lightning arrester 2, the the second stainless steel bar utmost point 4 correspondences are horizontally set on conductive pillar 5 upper ends of a side adjacent with lightning arrester unit, and conductive pillar 5 is electrically connected on base 1 by gap current instrument transformer 6.
Grounding switch unit comprises ground cutter body and for measuring the ground cutter current transformer 7 of neutral ground electric current, ground cutter body comprise ground cutter fixed contact 8, cutter conducting rod 9, cutter insulator 10, swivel axle 11 and ground cutter shaft operation connecting lever 12, ground cutter fixed contact 8 is arranged on the upper terminal of lightning arrester 2; Ground swivel axle 11 is horizontally disposed with, one end of ground swivel axle 11 connects earthing conducting rod 9 by ground cutter insulator 10, ground cutter conducting rod 9 by soft whipping wire 17, cutter current transformer 7 is electrically connected to base 1, the other end of ground swivel axle 11 connect cutter shaft operate connecting lever 12.Due to the connected mode of ground cutter insulator 10, avoided ground cutter shaft and hold the impact of shunting on current measurement, ground swivel axle 11 can directly adopt the axis hole supporting on base 1, between ground cutter operation connecting lever 12 and ground, there is no insulating requirements.
In the present embodiment, gap current instrument transformer and ground cutter current transformer are that punching current transformer is encapsulated in insulating sleeve, due to measured be earth current, the two ends of the primary current wire of current transformer are connected on respectively on the metal end plate up and down of insulating sleeve, and the bottom plate of current transformer is fixed on base.
Fig. 5,6 shows compact main transformer neutral point rod gap lightning arrester and the ground connection complete set of protective apparatus of the another kind of structure of the utility model, in the present embodiment, in these the complete sets of equipment, be unworthy of ground cutter current transformer 7, ground cutter insulator 10 cutter current transformer 7 configurations everywhere, also cancel the ground cutter insulator 10 being equipped with, ground cutter conducting rod 9 is directly electrically connected to base 1 by soft whipping wire; Ground cutter conducting rod 9 is directly connected and fixed with one end of ground swivel axle 11.
Strategic point cutter current transformer not during the current more than 90% neutral point the complete sets of equipment supply of material requires because main transformer this in neutral point outlet casing tube raises seat, neutral point current instrument transformer is housed.Only less than 10% complete sets of products, require to provide ground cutter current transformer, but the requirement of this electric insulation causes the variation of ground cutter mechanical structure.Main transformer neutral point ground cutter is in order to meet the requirement of measuring main transformer zero-sequence current, require ground cutter conducting rod insulation against ground, the insulation measures that GW13 and GW8 type ground cutter adopt all makes mechanical structure and the mounting means of ground cutter that larger variation has occurred, the simple structure that therefore can not adopt circuit ground cutter, causes the variation of product form.In the utility model, adopt the phase structure of circuit ground cutter, for the product that requires to provide ground cutter current transformer, the root of ground knife bar with an insulator with swivel shaft mechanical be connected, with soft whipping wire be electrically connected ground connection knife bar and instrument transformer; And for 90% user, not requiring provides ground cutter current transformer, knife bar with swivel axle be directly connected; Thisly at ground conduit root, with the insulation system that insulator connects, avoided the variation of the mechanical structure at ground cutter supporting and transmission position, the mechanical structure of the cutter that makes circuit ground cutter and neutral point can be substantially general.
Therefore said structure can improve the standardization level of product, with the comparison of GW8 type, has saved post insulator and independent bearing pedestal, has simplified product structure, can reduce the height of product simultaneously; With the comparison of GW13 type, ground cutter cost declines, and the base length of complete sets of products reduces.
Claims (3)
1. compact main transformer neutral point rod gap lightning arrester and a ground connection complete set of protective apparatus, comprise the lightning arrester unit being arranged in parallel on base, excellent gap element and grounding switch unit, it is characterized in that:
Lightning arrester unit, comprises lightning arrester, and lightning arrester doubles as the insulating supporting of excellent gap element and grounding switch unit;
Rod gap element comprises the first stainless steel bar utmost point, the second stainless steel bar utmost point, conductive pillar, gap current instrument transformer, the first stainless steel bar extremely level is arranged on the upper terminal of lightning arrester, the extremely corresponding conductive pillar upper end that is horizontally set on a side adjacent with lightning arrester unit of the second stainless steel bar, conductive pillar is electrically connected on base by gap current instrument transformer;
Grounding switch unit is mainly ground cutter body, ground cutter body comprise ground cutter fixed contact, cutter conducting rod, swivel axle and ground cutter shaft operation connecting lever, ground cutter fixed contact is arranged on the upper terminal of lightning arrester; Described ground swivel axle is horizontally disposed with, and by the axis hole on base, is supported, and one end of ground swivel axle connects earthing conducting rod, and ground cutter conducting rod is electrically connected to base by soft whipping wire, and the other end of ground swivel axle connects ground cutter shaft operation connecting lever.
2. compact main transformer neutral point according to claim 1 rod gap lightning arrester and ground connection complete set of protective apparatus, it is characterized in that: described grounding switch unit can be equipped with ground cutter current transformer, ground cutter conducting rod by soft whipping wire, cutter current transformer be electrically connected to base; Ground cutter conducting rod is connected and fixed by ground cutter insulator and one end of ground swivel axle.
3. compact main transformer neutral point according to claim 1 rod gap lightning arrester and ground connection complete set of protective apparatus; it is characterized in that: described gap current instrument transformer and ground cutter current transformer are that punching current transformer is encapsulated in insulating sleeve; the two ends of the primary current wire of current transformer are connected on respectively on the metal end plate up and down of insulating sleeve, and the bottom plate of current transformer is fixed on base.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420251514.XU CN203933003U (en) | 2014-05-16 | 2014-05-16 | A kind of compact main transformer neutral point rod gap lightning arrester and ground connection complete set of protective apparatus |
| PCT/CN2014/090178 WO2015172532A1 (en) | 2014-05-16 | 2014-11-03 | Compact main transformer neutral point rod gap lightning arrester and grounding whole-set protecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420251514.XU CN203933003U (en) | 2014-05-16 | 2014-05-16 | A kind of compact main transformer neutral point rod gap lightning arrester and ground connection complete set of protective apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203933003U true CN203933003U (en) | 2014-11-05 |
Family
ID=51828758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420251514.XU Expired - Fee Related CN203933003U (en) | 2014-05-16 | 2014-05-16 | A kind of compact main transformer neutral point rod gap lightning arrester and ground connection complete set of protective apparatus |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN203933003U (en) |
| WO (1) | WO2015172532A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114336398A (en) * | 2021-12-31 | 2022-04-12 | 江苏核电有限公司 | Grounding device for split-phase main transformer of nuclear power station |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771412A (en) * | 2017-03-27 | 2017-05-31 | 兴安供电公司 | Arrester live monitoring instrument combines adjustable installing bracket |
| CN108279326B (en) * | 2018-04-13 | 2024-02-06 | 国家电网公司 | Special insulating cover for neutral point gap grounding protection device for electrical test |
| CN110707650B (en) * | 2019-11-13 | 2024-10-22 | 国网上海市电力公司 | High-strength core rod type lightning arrester with visible fracture |
| CN112735794A (en) * | 2020-12-30 | 2021-04-30 | 山东泰开电力电器有限公司 | Mutual inductor for transformer neutral point |
| CN113066646B (en) * | 2021-03-09 | 2023-09-29 | 国网浙江省电力有限公司湖州供电公司 | Vacuum gap grounding complete equipment for neutral point of 110kV transformer |
| CN117506964B (en) * | 2024-01-08 | 2024-03-22 | 江苏骠马智能工业设计研究有限公司 | Split type ground knife structure of operation robot for power distribution cabinet |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI95328C (en) * | 1994-05-11 | 1997-02-18 | Esa Talkkari | Transformers surge protection |
| CN2591834Y (en) * | 2002-12-24 | 2003-12-10 | 杨逊弘 | Automatic short circuit gap apparatus of transformer central point |
| CN201608508U (en) * | 2010-01-26 | 2010-10-13 | 上海安越电气工程技术有限公司 | Transformer neutral point rod gap protection device |
| CN201887471U (en) * | 2010-12-24 | 2011-06-29 | 大连新安越电力设备有限公司 | Neutral rod-rod gap device of transformer |
| CN201946976U (en) * | 2010-12-24 | 2011-08-24 | 大连新安越电力设备有限公司 | Transformer neutral point rod gap combination device |
-
2014
- 2014-05-16 CN CN201420251514.XU patent/CN203933003U/en not_active Expired - Fee Related
- 2014-11-03 WO PCT/CN2014/090178 patent/WO2015172532A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114336398A (en) * | 2021-12-31 | 2022-04-12 | 江苏核电有限公司 | Grounding device for split-phase main transformer of nuclear power station |
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| Publication number | Publication date |
|---|---|
| WO2015172532A1 (en) | 2015-11-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20210516 |