CN115085172A - Arc extinction method for 10kV live working - Google Patents
Arc extinction method for 10kV live working Download PDFInfo
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- CN115085172A CN115085172A CN202210637878.0A CN202210637878A CN115085172A CN 115085172 A CN115085172 A CN 115085172A CN 202210637878 A CN202210637878 A CN 202210637878A CN 115085172 A CN115085172 A CN 115085172A
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- arc
- cable
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- pole
- switch
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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
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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Abstract
An arc extinction method for 10kV live working comprises the following steps: the arc suppression switch is in an off position; connecting the current leading end with a live wire; the power receiving end is connected with the lower pile head of the cable straight-lapping drainage wire; closing an arc extinguishing switch; removing an upper pile head of the cable straight-lapping drainage wire, after confirming that the load is born by the arc suppression switch, switching off the arc suppression switch by using the operating rod, at the moment, cutting off the load through the arc suppression switch, eliminating arc light generated by operation by the arc suppression switch, and enabling the arc suppression switch and the cable straight-lapping drainage wire to be in a non-electric state at the moment, so that the removing operation is finished; short pole live working arc extinguishing device includes first pole and second pole, the one end of first pole and second pole is equipped with chuck part respectively, be equipped with the arc extinction switch on the first pole, the one end of arc extinction switch is connected with first cable, and the other end and the second pole of first cable are connected. The invention simplifies the operation flow, reduces the shielding measures in the operation process, and improves the operation efficiency and the operation safety.
Description
Technical Field
The invention is suitable for the operations of directly assembling and disassembling cables and replacing switch equipment with load, in particular to an arc extinction method for 10kV live working.
Background
In some 10kV live working scenes, the arc suppression switch is needed to be used for conducting current guiding, arc suppression and temporary on-load operation, a traditional operation method is adopted, the arc suppression switch is needed to be used for shielding the operating equipment in a large area, the operation time is long, the labor intensity is high, the direct contact electrified body is long in aging and complex in steps, and the personnel are exposed to electric shock risks due to great risks.
Disclosure of Invention
The invention aims to provide an arc extinction method for 10kV live working, which simplifies the working process, reduces shielding measures in the working process and improves the working efficiency and the working safety.
The invention provides an arc extinction method for 10kV live working, which solves the technical problem and comprises the following steps:
step one, confirming that an arc suppression switch of the short-rod live working arc suppression device is in an off position;
secondly, connecting a current leading end of the short-rod live working arc extinction device with a live wire;
thirdly, connecting the power receiving end of the short-rod live working arc extinguishing device with the lower pile head of the cable direct-lapping drainage wire;
fourthly, closing an arc extinction switch by using the operating rod, electrifying the short-rod live working arc extinction device at the moment, and draining the upper pile head and the lower pile head of the cable direct-lapping drainage wire; the original cable straight-lapping drainage wire and the arc suppression switch are electrified simultaneously, and the upper pile head and the lower pile head of the cable straight-lapping drainage wire are in short circuit;
fifthly, after confirming that the arc suppression switch is in a drainage state, removing an upper pile head of the cable direct-lapping drainage wire, wherein at the moment, all the live loads are borne by the arc suppression switch, and the cable direct-lapping drainage wire is in a no-load state;
step six, after confirming that the load is born by the arc suppression switch, switching off the arc suppression switch by using the operating rod, at the moment, cutting off the load through the arc suppression switch, eliminating arc light generated by operation by the arc suppression switch, and enabling the arc suppression switch and a cable direct lapping drainage wire to be in a non-electricity state at the moment, so that the dismantling operation is finished;
short pole live working arc extinguishing device includes first pole and second pole, the one end of first pole and second pole is equipped with chuck part respectively for press from both sides tight electrified body and by electrified body or two same phase place's electrified body and non-electrified body, be equipped with the arc extinction switch on the first pole, the one end of arc extinction switch is connected with first cable, and the other end and the second pole of first cable are connected.
Preferably, the connection between the current leading end of the short-rod live working arc suppression device and the live wire and the connection between the power receiving end of the short-rod live working arc suppression device and the lower pile head of the cable direct-lapping drainage wire are realized through chuck components.
Preferably, the first rod, the second rod and the operating rod are all insulating rods, and the withstand voltage is not lower than 100 kV/min.
Preferably, the chuck component is detachably connected with the first rod and the second rod; the chuck part includes fixed chuck, activity chuck, connecting rod, fixed chuck activity is fixed on the connecting rod, the non-centre gripping end threaded connection of activity chuck is on the connecting rod, adjusts the size that the activity chuck can adjust activity chuck and fixed chuck centre gripping clearance, the one end threaded connection of connecting rod and first pole or second pole.
Preferably, the first cable is a single-core flexible cable, and the internal structure of the first cable comprises a conductive core, an insulating layer, a shielding layer and an outer sheath.
Preferably, the length of the first and second rods is not less than 0.7 m.
In summary, the technical scheme of the invention at least has the following beneficial effects:
1. shielding measures in the operation process can be reduced, the operation efficiency is improved, and the labor intensity of workers is reduced.
2. The frequency of direct contact of operators with charged bodies can be reduced, the operation safety is greatly improved, the life safety of the operators is ensured, and the occurrence of casualty accidents of the operators is reduced.
3. Through the design of short-bar live working arc extinguishing device, be convenient for with cable overlap joint, convenient to use.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of the connections during operation of the present invention;
fig. 2 is a structural view of the short-bar live working arc-extinguishing device of the present invention.
In the figure: 1. a first lever; 2. a second lever; 3. a chuck member; 31. fixing the chuck; 32. a movable chuck; 33. a connecting rod; 4. an arc extinction switch; 5. a first cable; 6. a live wire; 7. directly lapping a drainage wire on the cable; 8. poles or other towers; 9. a drainage end; 10. and a power receiving end.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to the accompanying drawings 1-2, the invention provides an arc extinction method for 10kV live working, which is suitable for the operation of directly erecting cables for dismantling and erecting, the operation of replacing switch equipment with load and the related operation needing an arc extinction switch 44; the method specifically comprises the following steps:
step one, confirming that an arc suppression switch 4 of the short-rod live working arc suppression device is in an off position;
secondly, connecting a current-guiding end 9 of the short-rod live working arc suppression device with a live wire 6 (realized through a chuck component 3) by an operator; at the moment, the pile head on the arc suppression switch 4 is electrified;
thirdly, connecting the power receiving end 10 of the short-rod live working arc-suppression switch 4 with the lower pile head of the cable direct-lapping drainage wire 7 by an operator (realized through the chuck component 3), and electrifying the lower pile head of the arc-suppression switch 4 at the moment;
fourthly, an operator closes the arc extinction switch 4 by using an operating rod (different from a first rod 1 and a second rod 2 in the short-rod live working arc extinction device), at the moment, the arc extinction switch 4 is electrified integrally, and the upper pile head and the lower pile head of a cable directly overlapping a drainage wire 7 are drained; the original cable directly-overlapping drainage wire 7 and the arc suppression switch 4 are electrified simultaneously, and the upper pile head and the lower pile head of the cable directly-overlapping drainage wire 7 are in short circuit;
fifthly, after confirming that the arc suppression switch 4 is in a drainage state, removing the upper pile head of the cable direct-lapping drainage wire 7, wherein at the moment, all the live load is borne by the arc suppression switch 4, and the cable direct-lapping drainage wire 7 is in a no-load state;
step six, after confirming that the load is born by the arc suppression switch 4, switching off the arc suppression switch 4 by using an operating rod, at the moment, cutting off the load through the arc suppression switch 4, eliminating arc light generated by operation by the arc suppression switch 4, and enabling the arc suppression switch 4 and the cable straight lapping drainage wire 7 to be in a non-electricity state at the moment, so that the dismantling operation is finished;
the short-rod live working arc extinction device used in the working process comprises a first rod 1 and a second rod 2, wherein one ends of the first rod 1 and the second rod 2 are respectively provided with a chuck component 3 for clamping a charged body and a charged body or two charged bodies and non-charged bodies with the same phase, and the maximum bearing current of the chuck component 3 is more than or equal to 200A; the first rod 1 is provided with an arc suppression switch 4, the capacity of closing and opening of the capacitance current of the arc suppression switch 4 is more than or equal to 5A, the operation life of the operating mechanism is not less than 1000 times, and the power frequency withstand voltage level of the arc suppression chamber and the contact is not lower than 42kV/min in the on-off state; one end of the arc extinction switch 4 is connected with a first cable 5, and the other end of the first cable 5 is connected with the second rod 2; the first cable 5 is a single-core flexible cable, the internal structure of the cable comprises a conductive core, an insulating layer, a shielding layer and an outer sheath, and the cable can transmit current of not less than 200A; the insulating layer has stable characteristics, higher insulation resistance, breakdown strength and excellent branch discharge resistance and partial discharge resistance.
In the invention, the chuck component 3 is detachably connected with the first rod 1 and the second rod 2; one embodiment of the chuck component 3 is that the chuck component 3 includes a fixed chuck 31, a movable chuck 32, and a connecting rod 33, the fixed chuck 31 is movably fixed on the connecting rod 33, a non-clamping end of the movable chuck 32 is screwed on the connecting rod 33, the movable chuck 32 can be adjusted to adjust a clamping gap between the movable chuck 32 and the fixed chuck 31, and the connecting rod 33 is screwed with one end of the first rod 1 or the second rod 2; convenient dismantlement through threaded connection effect can realize chuck part 31 like this, moreover when actual design, can change different chuck part 31 according to cable model, diameter size of difference etc. to reach better fixed effect.
The first cable 5 is a single-core flexible cable, and the internal structure of the first cable 5 comprises a conductive core, an insulating layer, a shielding layer and an outer sheath.
In the invention, the first rod 1, the second rod 2 and the operating rod are all insulating rods, wherein the lengths of the first rod 1 and the second rod 2 are not less than 0.7m (10kV live working related technical standard and required safe operating distance), the withstand voltage is not less than 100kV/min, the selected length of the operating rod can be as long as possible, the safety can be improved, and the general operating rod needs to operate the suspended arc-extinguishing switch 4 (the operating state is shown in figure 1), and the longer length is convenient to operate.
This application utilizes short bar operation method arc extinction switch 4 to carry out the drainage to equipment and carries out the bypass to equipment. And the equipment is dismantled and installed by the characteristic of current with load or capacitance current. The electric arc is prevented from causing electric shock or electric arc burn of operating personnel in the process of dismantling and installing the equipment, and the operation safety of the operating personnel is ensured. Shielding work can be greatly reduced, the operation time is short, the labor intensity is not large, direct contact of operators does not exist, and the steps are simple; the risk of electric shock of the operating personnel can be effectively reduced.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (6)
1. An arc extinction method for 10kV live working is characterized by comprising the following steps:
step one, enabling an arc suppression switch of the short-rod live working arc suppression device to be in an off position;
secondly, connecting a current leading end of the short-rod live working arc extinction device with a live wire;
thirdly, connecting the power receiving end of the short-rod live working arc extinguishing device with the lower pile head of the cable direct-lapping drainage wire;
fourthly, closing an arc extinction switch by using the operating rod, electrifying the short-rod live working arc extinction device at the moment, and draining the upper pile head and the lower pile head of the cable direct-lapping drainage wire; the original cable straight-lapping drainage wire and the arc suppression switch are electrified simultaneously, and the upper pile head and the lower pile head of the cable straight-lapping drainage wire are in short circuit;
fifthly, after confirming that the arc suppression switch is in a drainage state, removing an upper pile head of the cable direct-lapping drainage wire, wherein at the moment, all the live loads are borne by the arc suppression switch, and the cable direct-lapping drainage wire is in a no-load state;
step six, after confirming that the load is born by the arc suppression switch, disconnecting the arc suppression switch by using the operating rod, at the moment, cutting off the load through the arc suppression switch, eliminating arc light generated by operation by the arc suppression switch, and at the moment, enabling the arc suppression switch and a direct lapping lead wire of the cable to be in a non-electric state, and finishing the dismantling operation;
short pole live working arc extinguishing device includes first pole and second pole, the one end of first pole and second pole is equipped with chuck part respectively for press from both sides tight electrified body and by electrified body or two same phase place's electrified body and non-electrified body, be equipped with the arc extinction switch on the first pole, the one end of arc extinction switch is connected with first cable, and the other end and the second pole of first cable are connected.
2. An arc extinction method for 10kV live working according to claim 1, wherein connection between a current leading end of the short-rod live working arc extinction device and a live wire and connection between a current receiving end of the short-rod live working arc extinction device and a pile head under a cable straight-lapping current lead are achieved through chuck components.
3. An arc extinguishing method for 10kV live working according to claim 1, wherein the first rod, the second rod and the operating rod are all insulating rods, and the withstand voltage is not lower than 100 kV/min.
4. An arc extinction method for 10kV live working according to claim 1, wherein the chuck assembly is detachably connected with the first rod and the second rod; the chuck part includes fixed chuck, activity chuck, connecting rod, fixed chuck activity is fixed on the connecting rod, the non-centre gripping end threaded connection of activity chuck is on the connecting rod, adjusts the size that the activity chuck can adjust activity chuck and fixed chuck centre gripping clearance, the one end threaded connection of connecting rod and first pole or second pole.
5. An arc extinction method for 10kV live working according to the claim 1, wherein the first electric cable is a single-core flexible cable, and the internal structure of the first electric cable comprises a conductive core, an insulating layer, a shielding layer and an outer sheath.
6. An arc extinction method for 10kV live working according to claim 1, characterized in that the lengths of the first and second bars are not less than 0.7 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210637878.0A CN115085172A (en) | 2022-06-07 | 2022-06-07 | Arc extinction method for 10kV live working |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210637878.0A CN115085172A (en) | 2022-06-07 | 2022-06-07 | Arc extinction method for 10kV live working |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115085172A true CN115085172A (en) | 2022-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210637878.0A Pending CN115085172A (en) | 2022-06-07 | 2022-06-07 | Arc extinction method for 10kV live working |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115085172A (en) |
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2022
- 2022-06-07 CN CN202210637878.0A patent/CN115085172A/en active Pending
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