CN201044331Y - Low-voltage short circuit grounding disconnecting link - Google Patents
Low-voltage short circuit grounding disconnecting link Download PDFInfo
- Publication number
- CN201044331Y CN201044331Y CNU2007200313232U CN200720031323U CN201044331Y CN 201044331 Y CN201044331 Y CN 201044331Y CN U2007200313232 U CNU2007200313232 U CN U2007200313232U CN 200720031323 U CN200720031323 U CN 200720031323U CN 201044331 Y CN201044331 Y CN 201044331Y
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- contact
- short circuit
- disconnecting link
- contacts
- grounding
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Abstract
The utility model relates to a low voltage short-circuit earthing disconnecting link which comprises a pedestal, at least two fixed contacts respectively connected with power source ends, and moving contacts connected with loads, and also comprises earthing contacts, the number of which is the same as the fixed contacts, wherein, the fixed contacts and the earthing contacts are respectively arranged on both ends of the pedestal; the moving contacts are arranged between the fixed contacts and the earthing contacts which are connected with earth lines. The utility model solves the technical problems of difficult earthing of the low voltage disconnecting link, hidden trouble of earth line switching-in, and easy occurrence of safety accidents, and has the advantages of simple structure, convenient earthing, and capability of preventing the occurrence of earth line switching-in accidents and on-load drawing disconnecting link accidents.
Description
Technical field
The utility model relates to a kind of low pressure disconnecting link.
Background technology
At present in the low voltage electric network, distribution transformer low pressure leading-out terminal is through power distribution cabinet (dish, case) outlet, adopt built on stilts plain conductor, suspended insulated guide wire, sunken cord and the Bundling conducting wire mode is powered.In real work, owing to need on line facility, work, according to the requirement of " rural area low-voltage electrical trouble free service rules ": " should on the conductor of two ends, the working point of repair apparatus (section) hanging earthing conductor ".In the real work, owing to be not fit to the special-purpose earth connection of low-voltage distribution cabinet (dish, case), so adopt the earth connection of other form to go to articulate mostly.But low-voltage distribution cabinet (dish, case) space is narrow and small, influences other working line equipment and very dangerous easily; Circuit adopt insulated conductor, sunken cord and Bundling conducting wire, if want hanging earthing conductor, certainly will on lead, increase a lot of openings, influence the operation of line facility, brought difficulty to a certain degree to service work; If be connected to generator in the circuit, be easy to take place security incident; When after hours, operating personnel may forget and remove earth connection and the power supply of directly closing a floodgate, and then might have the hidden danger of switching on earth wire.
Summary of the invention
The utility model purpose provides a kind of low pressure short circuit ground connection disconnecting link, and it has solved background technology mesolow disconnecting link ground connection difficulty, have the hidden danger of switching on earth wire, the technical problem of security incident takes place easily.
Technical solution of the present utility model is:
A kind of low pressure short circuit ground connection disconnecting link, at least two fixed contacts 1 that comprise base 3, are connected respectively with power end, the moving contact 2 that is connected with load, its special character is that described low pressure short circuit ground connection disconnecting link also comprises the grounding contact 4 that quantity equates with fixed contact 1; Described fixed contact 1 and grounding contact 4 are separately positioned on the two ends of base 3, and described moving contact 2 is arranged on the centre of fixed contact 1 and grounding contact 4; Described grounding contact 4 is connected with ground wire.
The quantity of above-mentioned fixed contact 1 and grounding contact 4 can be respectively two; Described two fixed contacts 1 are connected with zero line with live wire respectively; Be connected with ground wire behind described two grounding contact 4 short circuits.
The quantity of above-mentioned fixed contact 1 and grounding contact 4 also can be respectively three; Described three fixed contacts 1 connect with three-phase firewire respectively; Be connected with ground wire behind described three grounding contact 4 short circuits.
The quantity of above-mentioned fixed contact 1 and grounding contact 4 also can be respectively four; Described four fixed contacts 1 are connected with three-phase firewire with center line respectively; Be connected with ground wire behind described four grounded contact 4 short circuits.
Above-mentioned low pressure short circuit ground connection disconnecting link also comprises the closed lock 5 of the electromagnetism that can guarantee plug-in strip and fixed contact 1 closure under the energising situation; The closed lock 5 of described electromagnetism is arranged between power end and the fixed contact 1.
The utility model has the advantages that:
1, simple in structure.The utility model is the structural improvement at common low pressure disconnecting link, only need increase the ground connection disconnecting link of respective numbers on the basis of common low pressure disconnecting link, and reliable ground can be realized in its below that is arranged on moving contact 2.
2, ground connection is convenient.When for the first time the utility model low pressure short circuit ground connection disconnecting link being installed, the lead-out wire of grounding contact 4 is linked to each other with the special-purpose earth electrode of power distribution cabinet, can guarantee the reliable ground after any time is drawn back disconnecting link.
3, can prevent the generation of switching on earth wire accident.Reasonable Arrangement by to fixed contact 1, moving contact 2 and grounding contact 4 can not connect power supply in the time of can guaranteeing disconnecting link ground connection, and impossible ground connection has promptly been realized the mechanical latching to single power supply when connecing power supply, prevents the generation of switching on earth wire accident.
4, can prevent the generation of on-load broaching tool lock accident.The utility model adds the closed lock 5 of electromagnetism at this disconnecting link mains side, then can realize preventing the generation of on-load broaching tool lock accident.
Description of drawings
Fig. 1 is the combined floodgate circuit theory diagrams of the utility model when being used for quarter-phase circuit;
Fig. 2 is the operate a switch circuit theory diagrams of the utility model when being used for quarter-phase circuit;
Fig. 3 is the combined floodgate circuit theory diagrams of the utility model when being used for three-phase circuit;
Fig. 4 is the operate a switch circuit theory diagrams of the utility model when being used for three-phase circuit;
Fig. 5 is the combined floodgate circuit theory diagrams of the utility model when being used for the three-phase and quadrupole circuit;
Fig. 6 is the operate a switch circuit theory diagrams of the utility model when being used for the three-phase and quadrupole circuit;
Wherein: 1-fixed contact, 2-moving contact, 3-base, 4-grounding contact, the closed lock of 5-electromagnetism, 6-air switch.
Embodiment
First kind of embodiment of the present utility model seen Fig. 1 and Fig. 2, two fixed contacts 1 that comprise base 3, are connected respectively with power end, the moving contact 2 that is connected with load, two grounding contacts 4 that are connected with ground wire, fixed contact 1 and grounding contact 4 are separately positioned on the two ends of base 3, moving contact 2 is arranged on the centre of fixed contact 1 and grounding contact 4, and two fixed contacts 1 are connected with zero line with live wire respectively.
Second kind of embodiment of the present utility model seen Fig. 3 and Fig. 4, three fixed contacts 1 that comprise base 3, are connected respectively with power end, the moving contact 2 that is connected with load, three grounding contacts 4 that are connected with ground wire, fixed contact 1 and grounding contact 4 are separately positioned on the two ends of base 3, moving contact 2 is arranged on the centre of fixed contact 1 and grounding contact 4, and three fixed contacts 1 are connected with three-phase firewire respectively.
The third embodiment of the present utility model is seen Fig. 5 and Fig. 6, four fixed contacts 1 that comprise base 3, are connected respectively with power end, the moving contact 2 that is connected with load, the four grounded contact 4 that is connected with ground wire, fixed contact 1 and grounding contact 4 are separately positioned on the two ends of base 3, moving contact 2 is arranged on the centre of fixed contact 1 and grounding contact 4, and four fixed contacts 1 are connected with center line with three-phase firewire respectively.
In order to prevent the operate a switch generation of accident of on-load.Low pressure short circuit ground connection disconnecting link also is provided with the closed lock 5 of electromagnetism, and the closed lock of electromagnetism power supply links to each other with the load side of power supply air switch, can guarantee the closure of plug-in strip and fixed contact 1 under the closed lock of this electromagnetism 5 energising situations, and external force can't be drawn back disconnecting link; Under the powering-off state, the closed lock 5 of electromagnetism loses power supply, and the closed lock 5 of electromagnetism can draw back.The closed lock 5 of this electromagnetism is arranged between power end and the fixed contact 1.
Operation principle of the present utility model is:
The utility model low pressure short circuit ground connection disconnecting link moving contact 2 when normal operation is combined in mains side fixed contact 1, powers; Moving contact 2 is combined in grounding contact 4 during power failure work, carries out the short circuit ground protection.The grounding contact 4 of disconnecting link links together with the special-purpose earth electrode of power distribution cabinet (case).See Fig. 3 during normal the operation, four fixed contact 1A, B, C, O connect mains side; Moving contact 2A ', B ', C ', O ' link (load) side, moving contact 2 is combined in A, B, C, O.During power failure work, moving contact 2A ', B ', C ', O ' are combined in a, b, the four grounded contact 4 of c, o, carry out short circuit ground connection.
Claims (5)
1. low pressure short circuit ground connection disconnecting link, at least two fixed contacts (1) that comprise base (3), are connected respectively with power end, the moving contact (2) that is connected with load, it is characterized in that: described low pressure short circuit ground connection disconnecting link also comprises the grounding contact (4) that quantity equates with fixed contact (1); Described fixed contact (1) and grounding contact (4) are separately positioned on the two ends of base (3), and described moving contact (2) is arranged on the centre of fixed contact (1) and grounding contact (4); Described grounding contact (4) is connected with ground wire.
2. low pressure short circuit ground connection disconnecting link according to claim 1 is characterized in that: the quantity of described fixed contact (1) and grounding contact (4) is respectively two; Described two fixed contacts (1) are connected with zero line with live wire respectively; Be connected with ground wire behind described two grounding contacts (4) short circuit.
3. low pressure short circuit ground connection disconnecting link according to claim 1 is characterized in that: the quantity of described fixed contact (1) and grounding contact (4) is respectively three; Described three fixed contacts (1) connect with three-phase firewire respectively; Be connected with ground wire behind described three grounding contacts (4) short circuit.
4. low pressure short circuit ground connection disconnecting link according to claim 1 is characterized in that: the quantity of described fixed contact (1) and grounding contact (4) is respectively four; Described four fixed contacts (1) are connected with three-phase firewire with center line respectively; Be connected with ground wire behind described four grounded contact (4) short circuit.
5. according to claim 1 or 2 or 3 or 4 described low pressure short circuit ground connection disconnecting links, it is characterized in that: described low pressure short circuit ground connection disconnecting link also comprises can guarantee plug-in strip and the closed closed lock of electromagnetism (5) of fixed contact (1) under the energising situation; The closed lock of described electromagnetism (5) is arranged between power end and the fixed contact (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200313232U CN201044331Y (en) | 2007-03-08 | 2007-03-08 | Low-voltage short circuit grounding disconnecting link |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200313232U CN201044331Y (en) | 2007-03-08 | 2007-03-08 | Low-voltage short circuit grounding disconnecting link |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201044331Y true CN201044331Y (en) | 2008-04-02 |
Family
ID=39259221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200313232U Expired - Lifetime CN201044331Y (en) | 2007-03-08 | 2007-03-08 | Low-voltage short circuit grounding disconnecting link |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201044331Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742967A (en) * | 2016-03-22 | 2016-07-06 | 国网浙江省电力公司丽水供电公司 | Terminal box |
-
2007
- 2007-03-08 CN CNU2007200313232U patent/CN201044331Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742967A (en) * | 2016-03-22 | 2016-07-06 | 国网浙江省电力公司丽水供电公司 | Terminal box |
| CN105742967B (en) * | 2016-03-22 | 2017-12-22 | 国网浙江省电力公司丽水供电公司 | A kind of termination rack |
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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: SHANXI YANGZI ELECTRIC CO., LTD. Free format text: FORMER OWNER: XU WENSHENG Effective date: 20090807 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090807 Address after: No 398, Changle West Road, Xi'an, Shaanxi Province, 710032 Patentee after: Shaanxi Yangzi Electric Power Co., Ltd. Address before: Weinan Power Supply Bureau, No. 110 Qianjin Road, Linwei District, Shaanxi Province, Weinan 714000, China Co-patentee before: Zhou Tianxing Patentee before: Xu Wen Sheng Co-patentee before: Xu Bin |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080402 |
|
| CX01 | Expiry of patent term |