CN203166495U - Device for eliminating induction voltage of low voltage circuit - Google Patents
Device for eliminating induction voltage of low voltage circuit Download PDFInfo
- Publication number
- CN203166495U CN203166495U CN 201320144849 CN201320144849U CN203166495U CN 203166495 U CN203166495 U CN 203166495U CN 201320144849 CN201320144849 CN 201320144849 CN 201320144849 U CN201320144849 U CN 201320144849U CN 203166495 U CN203166495 U CN 203166495U
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- Prior art keywords
- eliminating
- throw switch
- pole double
- phase single
- low
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Abstract
The utility model relates to a device for eliminating induction voltage of a low voltage circuit. The device is installed on a distribution line required to be maintained, and comprises a down lead, a three-phase single-pole double-throw switch and a grounding wire, wherein the down lead is connected to the distribution line required to be maintained; the three-phase single-pole double-throw switch is arranged between the down lead and the grounding wire; and the upper end of the grounding wire is connected to the three-phase single-pole double-throw switch, and the lower end is grounded. Compared with the prior art, when the device provided by the utility model is used, one end of the grounding wire is fixed and fastened with a grounding body first, and then the down lead and the grounding wire are connected through connecting the three-phase single-pole double-throw switch. The device for eliminating the induction voltage of the low voltage circuit has the advantages of low cost, convenient installation, safety, reliability and the like.
Description
Technical field
The utility model relates to a kind of induced voltage cancellation element, especially relates to a kind of device of eliminating the low-voltage circuit induced voltage.
Background technology
In recent years along with the develop rapidly of electric utility, the safe operation of 1000KV ultra high voltage, 500KV has become the major network structure.Power supply reliability for support equipment, all to carry out preventive trial to it at different model equipment every several years, check whether test data meets standard, sometimes in process of the test, also need the lead-in wire of power failure equipments both sides is removed, owing near power failure equipments, also have the equipment of operation, so can produce induced voltage at the equipment that has a power failure, the intensity of induced voltage higher (the particularly above electric pressure of 220KV), can cause the staff can't operate as normal, generally be ground connection between the bottom of high-altitude operation vehicle and earth mat for eliminating the induced voltage staff, between the lead-in wire that top and the needs of high-altitude operation vehicle are removed, link to each other again then, play the way of eliminating induced voltage like this, though this way is often used, flow process is loaded down with trivial details, but also can not eliminate induced voltage completely.Because behind the bolt of removing anchor leg, put to ground after the lead-in wire colligation that need will remove with rope, so just need remove the top of high-altitude operation vehicle and the earth connection that needs to link to each other between the lead-in wire of dismounting, so also have induced voltage on the lead-in wire that is removed.
Transmission line is in construction and in service, find that it is a series of induced electricity problems such as electroprobe is bright, the numb electricity of low-voltage circuit that the resident complains more, especially parallel industry of setting up and the civilian distribution wire induced voltage problem under power-off condition under the extra high voltage network, caused public's impression of shocking by electricity, making the public frightened to the extra high voltage network generation, is to hinder the main cause that transmission line is completed on time and normally move.At present, the device that does not still have this type of problem of solution.
The utility model content
The purpose of this utility model is exactly the device that low, easy for installation, the safe and reliable elimination low-voltage circuit induced voltage of a kind of cost is provided for the defective that overcomes above-mentioned prior art existence.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of device of eliminating the low-voltage circuit induced voltage is installed on the distribution line that needs maintenance, and this device comprises downlead, three-phase single-pole double-throw switch (SPDT) and earth connection,
Described downlead is connected on the distribution line that needs maintenance;
Described three-phase single-pole double-throw switch (SPDT) is arranged between downlead and the earth connection;
Described earth connection upper end connects three-phase single-pole double-throw switch (SPDT), lower end ground connection.
On the described downlead hinge-type anchor ear can also be set.
The outside of described earth connection is coated with insulating barrier.
Described earth connection end is provided with terminal block, connects ground connection by bolt.
Compared with prior art, the utility model when in use, and is earlier that an end and the earth electrode of earth connection is fixing fastening, connects downlead and earth connection by connecting the three-phase single-pole double-throw switch (SPDT), has advantages such as cost is low, easy for installation, safe and reliable.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among the figure, 1 is that downlead, 2 is that three-phase single-pole double-throw switch (SPDT), 3 is the distribution line of earth connection, 4 for needing to overhaul.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Embodiment
A kind of device of eliminating the low-voltage circuit induced voltage, its structure as shown in Figure 1, be installed on the distribution line 4 that needs maintenance, this device comprises downlead 1, three-phase single-pole double-throw switch (SPDT) 2 and earth connection 3, downlead 1 is connected on the distribution line 4 that needs maintenance, on downlead 1, the hinge-type anchor ear can also be set, the convenient connection.Three-phase single-pole double-throw switch (SPDT) 2 is arranged between downlead 1 and the earth connection 3, the upper end of earth connection 3 connects three-phase single-pole double-throw switch (SPDT) 2, lower end ground connection, the outside at earth connection 3 also is coated with insulating barrier, the end of earth connection 3 is provided with terminal block, connect ground connection by bolt, this device directly is connected to be needed to eliminate faradic low pressure dead line, and induced electricity will disappear.
Claims (4)
1. a device of eliminating the low-voltage circuit induced voltage is installed on the distribution line that needs maintenance, it is characterized in that this device comprises downlead, three-phase single-pole double-throw switch (SPDT) and earth connection,
Described downlead is connected on the distribution line that needs maintenance;
Described three-phase single-pole double-throw switch (SPDT) is arranged between downlead and the earth connection;
Described earth connection upper end connects three-phase single-pole double-throw switch (SPDT), lower end ground connection.
2. a kind of device of eliminating the low-voltage circuit induced voltage according to claim 1 is characterized in that, on the described downlead hinge-type anchor ear can also be set.
3. a kind of device of eliminating the low-voltage circuit induced voltage according to claim 1 is characterized in that the outside of described earth connection is coated with insulating barrier.
4. a kind of device of eliminating the low-voltage circuit induced voltage according to claim 1 is characterized in that, described earth connection end is provided with terminal block, connects ground connection by bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320144849 CN203166495U (en) | 2013-03-27 | 2013-03-27 | Device for eliminating induction voltage of low voltage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320144849 CN203166495U (en) | 2013-03-27 | 2013-03-27 | Device for eliminating induction voltage of low voltage circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203166495U true CN203166495U (en) | 2013-08-28 |
Family
ID=49027655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320144849 Expired - Lifetime CN203166495U (en) | 2013-03-27 | 2013-03-27 | Device for eliminating induction voltage of low voltage circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203166495U (en) |
-
2013
- 2013-03-27 CN CN 201320144849 patent/CN203166495U/en not_active Expired - Lifetime
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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: 20130828 |
|
| CX01 | Expiry of patent term |