CN115085172A - Arc extinction method for 10kV live working - Google Patents

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

A kind of arc suppression method for 10kV live work

technical field

The invention is suitable for the work of dismantling, laying up, and replacing switchgear with a load, especially an arc suppression method for 10kV live work.

Background technique

In some 10kV live work scenarios, the arc suppression switch needs to be used for drainage, arc suppression and temporary load operation. Using the traditional operation method, the operating equipment needs to be shielded in a large area when the arc suppression switch is used. The operation time is long and labor intensive. Large, direct contact with the charged body has a long time, and the steps are cumbersome, and there is a great risk that people will be exposed to electric shock.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an arc extinguishing method for 10kV live operation, which simplifies the operation process, reduces the shielding measures in the operation process, and improves the operation efficiency and operation safety.

The invention provides an arc suppression method for 10kV live operation, and the technical solution for solving the technical problem includes the following steps:

Step 1. Confirm that the arc suppression switch of the short pole live work arc suppression device is in the off position;

Step 2: Connect the drain end of the short pole live work arc suppression device to the live wire;

Step 3. Connect the power receiving end of the short pole live work arc suppression device to the pile head of the cable straight over the drain line;

Step 4. Use the operating lever to close the arc suppression switch. At this time, the short pole live work arc suppression device is electrified as a whole, and the cable is directly connected to the drainage line and the upper and lower pile heads are drained; the original cable is directly connected to the drainage line and the arc suppression switch. The upper and lower pile heads of the drainage line are short-circuited;

Step 5. After confirming that the arc suppression switch is in the draining state, remove the upper pile head of the cable straight over the drain line. At this time, the live load is all borne by the arc suppression switch, and the cable straight over the drain line is in a no-load state;

Step 6. After confirming that the load is borne by the arc suppression switch, use the operating lever to turn off the arc suppression switch. At this time, the load is cut off by the arc suppression switch, and the arc generated by the operation is eliminated by the arc suppression switch. At this time, the arc suppression switch is connected to the cable. The direct drain line is in a no-power state, and the dismantling operation is completed;

The short rod live work arc suppression device includes a first rod and a second rod, and one end of the first rod and the second rod is respectively provided with a collet part for clamping the charged body and the charged body or both. For the charged body and the non-charged body of the same phase, the first rod is provided with an arc suppression switch, one end of the arc suppression switch is connected with a first cable, and the other end of the first cable is connected with the second rod.

Preferably, the connection between the drain end of the short pole live work arc suppression device and the live wire, and the connection between the power receiving end of the short pole live work arc suppression device and the lower pile head of the cable straight over the drain line are all realized by the clamp part. .

Preferably, the first rod, the second rod and the operating rod are all insulating rods, and the withstand voltage is not less than 100kV/min.

Preferably, the collet part is detachably connected to the first rod and the second rod; the collet part includes a fixed collet, a movable collet and a connecting rod, and the fixed collet is movably fixed on the On the connecting rod, the non-clamping end of the movable collet is threadedly connected to the connecting rod, and adjusting the movable collet can adjust the size of the clamping gap between the movable collet and the fixed collet. One end of the two rods is screwed together.

Preferably, the first cable is a single-core flexible cable, and the internal structure of the first cable includes a conductive core, an insulating layer, a shielding layer, and an outer sheath.

Preferably, the length of the first rod and the second rod is not less than 0.7m.

To sum up, using the technical solution of the present invention at least has the following beneficial effects:

1. It can reduce the shielding measures in the operation process, improve the operation efficiency, and reduce the labor intensity of workers.

2. It can reduce the number of direct contact with live objects by operators, greatly improve the safety of operations, ensure the safety of personnel, and reduce the occurrence of casualties.

3. Through the design of the arc suppression device for live work on the short pole, it is easy to overlap with the cable and easy to use.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the connection schematic diagram in the working process of the present invention;

Fig. 2 is the structure diagram of the short rod live work arc suppression device of the present invention.

In the figure: 1, the first rod; 2, the second rod; 3, the collet part; 31, the fixed collet; 32, the movable collet; 33, the connecting rod; 4, the arc suppression switch; 5, the first cable ; 6. Live wire; 7. The cable is directly connected to the drainage line; 8. The pole or on other towers; 9. The drainage end; 10. The receiving end.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Referring to Figures 1-2, the present invention provides an arc suppression method for 10kV live work, which is suitable for straight-over cable dismantling, erection operations, switchgear replacement operations under load, and related operations that require the use of arc suppression switches 44 ; specifically includes the following steps:

Step 1. Confirm that the arc suppression switch 4 of the short pole live work arc suppression device is in the off position;

Step 2, the operator connects the drain end 9 of the short rod live work arc suppression device with the live wire 6 (realized by the chuck part 3); at this time, the pile head on the arc suppression switch 4 is electrified;

Step 3: The operator connects the power receiving end 10 of the arc suppression switch 4 with the short-rod live operation method to the lower pile head of the cable straight over the drain line 7 (achieved by the clamp part 3), and the position of the lower pile head of the arc suppression switch 4 is at this time. charged;

Step 4. The operator uses the operating lever (different from the first lever 1 and the second lever 2 in the short-bar live work arc suppression device) to close the arc suppression switch 4. At this time, the arc suppression switch 4 is fully charged, and the cable is directly connected to drain the current. The upper and lower pile heads of line 7 are drained; the original cable directly overlaps the drain line 7 and the arc suppression switch 4 is charged at the same time, and the upper and lower pile heads of the cable directly overlaps the drain line 7 are short-circuited;

Step 5. After confirming that the arc suppression switch 4 is in a draining state, remove the upper pile head of the cable straight-over drain wire 7. At this time, the live load is all borne by the arc-suppression switch 4, and the cable straight over drain line 7 is in a no-load state;

Step 6. After confirming that the load is borne by the arc suppression switch 4, use the operating lever to turn off the arc suppression switch 4. At this time, the load is cut off by the arc suppression switch 4, and the arc generated by the operation is eliminated by the arc suppression switch 4. The arc switch 4 and the cable directly overlap the drain line 7 in a no-power state, and the dismantling operation is completed;

Wherein, the short rod live working arc suppression device used in the operation process includes a first rod 1 and a second rod 2, and one end of the first rod 1 and the second rod 2 is respectively provided with a collet part 3, which is used for Clamp the charged body and the charged body or two charged bodies and non-charged bodies of the same phase, and the maximum current of the clamp part 3 is greater than or equal to 200A; the first rod 1 is provided with an arc-extinguishing switch 4, the arc-extinguishing switch 4. The capacitor current making and breaking capacity is greater than or equal to 5A, the operating life of the operating mechanism should not be less than 1000 times, and the power frequency withstand voltage level of the arc extinguishing chamber and contacts should not be less than 42kV/ min; one end of the arc suppression 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; wherein the first cable 5 is a single-core flexible cable, and the internal structure of the cable includes conductive Core, insulating layer, shielding layer, outer sheath, the cable can transmit a current of not less than 200A; the insulating layer has stable characteristics, high insulation resistance, breakdown strength, excellent resistance to branch discharge and partial discharge performance.

In the present invention, the collet member 3 is detachably connected to the first rod 1 and the second rod 2; an embodiment of the collet member 3 is that the collet member 3 includes a fixed collet 31, a movable clip The head 32, the connecting rod 33, the fixed collet 31 is movably fixed on the connecting rod 33, the non-clamping end of the movable collet 32 is threadedly connected to the connecting rod 33, and the movable collet 32 can be adjusted to adjust the movable collet 32 is the size of the clamping gap with the fixed collet 31, and the connecting rod 33 is threadedly connected with one end of the first rod 1 or the second rod 2; in this way, the collet part 31 can be easily disassembled through the threaded connection effect, and in In actual design, different chuck parts 31 can be replaced according to different cable types and diameters, so as to achieve a better fixing effect.

In the present invention, the first cable 5 is a single-core flexible cable, and the internal structure of the first cable 5 includes a conductive core, an insulating layer, a shielding layer, and an outer sheath.

In the present invention, the first rod 1, the second rod 2 and the operating rod are all insulating rods, wherein the length of the first rod 1 and the second rod 2 is not less than 0.7m (the relevant technical standards for 10kV live work and the required safe operating distance) , and the withstand voltage is not less than 100kV/min, the length of the operating lever can be as long as possible, which can improve safety, and generally the operating lever needs to operate the suspended arc suppression switch 4 (see Figure 1 for the state of operation during operation), Longer length for easier handling.

In the present application, the arc suppression switch 4 of the short-rod operation method is used to drain the equipment and bypass the equipment. Dismantling and installation of equipment with load or with capacitive current through the characteristics of the current. Make sure that the electric arc does not cause electric shock or arc burn to the operator during the dismantling and installation of the equipment, so as to ensure the safety of the personnel. The shielding work can be greatly reduced, the operation time is short, the labor intensity is not large, the operators do not have direct contact, and the steps are simple; it can effectively reduce the risk of electric shocks for the operators.

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made, and these improvements and modifications may also be regarded as It is the protection scope of the present invention.

Claims (6)

1. an arc suppression method for 10kV live work, is characterized in that, comprises the following steps: Step 1. Make the arc suppression switch of the short pole live work arc suppression device in the off position; Step 2: Connect the drain end of the short pole live work arc suppression device to the live wire; Step 3. Connect the power receiving end of the short pole live work arc suppression device to the pile head of the cable straight over the drain line; Step 4. Use the operating lever to close the arc suppression switch. At this time, the short pole live work arc suppression device is electrified as a whole, and the cable is directly connected to the drainage line and the upper and lower pile heads are drained; the original cable is directly connected to the drainage line and the arc suppression switch. The upper and lower pile heads of the drainage line are short-circuited; Step 5. After confirming that the arc suppression switch is in the draining state, remove the upper pile head of the cable straight over the drain line. At this time, the live load is all borne by the arc suppression switch, and the cable straight over the drain line is in a no-load state; Step 6. After confirming that the load is borne by the arc suppression switch, use the operating lever to turn off the arc suppression switch. At this time, the load is cut off by the arc suppression switch, and the arc generated by the operation is eliminated by the arc suppression switch. At this time, the arc suppression switch is connected to the cable. The direct drain line is in a no-power state, and the dismantling operation is completed; The short rod live work arc suppression device includes a first rod and a second rod, and one end of the first rod and the second rod is respectively provided with a collet part for clamping the charged body and the charged body or both. For the charged body and the non-charged body of the same phase, the first rod is provided with an arc suppression switch, one end of the arc suppression switch is connected with a first cable, and the other end of the first cable is connected with the second rod. 2. A kind of arc suppression method for 10kV live work according to claim 1, it is characterized in that, the connection between the drain end of the short rod live work arc suppression device and the live wire, the connection of the short rod live work arc suppression device. The connection between the power receiving end and the pile head of the cable directly overlapping the drain line is realized by the clamp part. 3. The arc suppression method for 10kV live work 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 less than 100kV/min . 4. The arc suppression method for 10kV live work according to claim 1, wherein the collet part is detachably connected to the first rod and the second rod; the collet part The parts include a fixed collet, a movable collet, and a connecting rod. The fixed collet is movably fixed on the connecting rod. The non-clamping end of the movable collet is threaded on the connecting rod. Adjusting the movable collet can adjust the movable clamp The size of the clamping gap between the head and the fixed collet, and the connecting rod is threadedly connected to one end of the first rod or the second rod. 5 . The arc suppression method for 10kV live work according to claim 1 , wherein the first cable is a single-core flexible cable, and the internal structure of the first cable includes a conductive core, an insulating layer, a shielding layer, outer sheath. 6 . The arc suppression method for 10kV live operation according to claim 1 , wherein the length of the first rod and the second rod is not less than 0.7m. 7 .

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