MXPA00003421A - Surge arrester having single surge arresting block - Google Patents

Abstract

A surge arrester includes an electrically insulating arrester housing and a surge arresting block housed within the electrically insulating arrester housing. The surge arresting block is arranged to provide support for the surge arrester without the use of a support member. The surge arresting block may be a single surge arresting block having a voltage rating of at least 9 KV. The surge arresting block may have threads formed integrally therewith.

Description

OF INTERRUPTION OF VARIATION TECHNICAL FIELD OF THE INVENTION The present invention relates to a variation lightning arrester for diverting electrical variations to the ground.

Background of the Invention Variations in overvoltage. which travel along an electric power distribution system and which do not deviate or deviate properly, often damage transformers and other electrical equipment of the electric power distribution system, as well as the electrical equipment of residential customers , commercial and industrial to which it supplies the electric power distribution system. As a consequence, surge arresters are commonly used in an electric power distribution system to divert variations in overvoltage to the system floor, before variations in overvoltage can damage the electrical equipment connected to, or to, the distribution system. of electric power. A typical surge arrester used in electrical power distribution systems, includes an insulation housing, a block of blocks of * - ¿s ?. ..jfe variation interruption, end connectors that are in electrical contact with each end of the variation interruption blocks and which are configured to electrically connect the variation lightning arrestor between the first and the second power line and a disconnector of failure to disconnect the surge arrester from the first and / or the second power line in the case of a failure in the variation interruption block. The number of interruption blocks of variation in the number of variation interruption blocks depends on the geometry of the variation interruption blocks and the nominal voltage capacity of the variation arrester. For example, a lightning arrestor assigned at 9 KV, usually has two or three blocks of variation interruption. The isolation housing of the typical variation lightning arrester that is not made of porcelain is not strong enough to support and contain the number of interruption blocks of variation. Therefore, a support member, such as a fiberglass wrap or a fiberglass bushing, is provided around the stack of variation interruption blocks and the end connectors, in order to contain and support the blocks of glass. interruption of variation inside the insulation housing. Additional elements, such as springs, corrugated washers, and / or the like, are provided for the purpose of compressing the variation interruption blocks. Due to the use of a support member and multiple variation interruption blocks, a variation surge arrester as described above, is expensive to produce. The present invention is directed to a variation lightning arrester, which eliminates the need for a support member and / or which uses a reduced number of variation interruption blocks.

SUMMARY OF THE INVENTION In accordance with one aspect of the present invention, a variation lightning arrester comprises an electrically insulating lightning arrestor housing and a variation stop block housed within the housing of the electrically insulating lightning arrester. The variation interruption block is configured to provide support for the variation lightning arrester without the use of a support member. In accordance with another aspect of the present invention, a variation lightning arrester comprises a single variation interruption block, which is housed within an electrically insulating lightning arrestor housing. The single variation interruption block is made of a material, and the single variation interruption block has filaments that are formed from the material. In accordance with yet another aspect of the present invention, a variation lightning arrester comprises a variation stop block which is housed within an electrically insulating lightning arrestor housing. The variation interruption block is made of a continuous material so that the variation interruption block is of a unitary construction, and the variation interruption block has a nominal voltage capacity of at least 9 KV. According to yet another aspect of the present invention, a method for forming a variation interruption block comprises the following steps: a) placing enough material in an isostatic press to form a variation interruption block having a nominal voltage rating of at least 9 KV; and b) controlling the isostatic press with a pressure / time profile that is configured to join the material together, in order to form the variation interruption block.

BRIEF DESCRIPTION OF THE DRAWINGS These and other features and advantages of the present invention will be apparent from the consideration of the invention when taken in conjunction with the drawings, in which: Figure 1 illustrates a variation lightning arrestor which incorporates a variation interruption block and a pair of end connectors and which is configured in accordance with the present invention; Figure 2 illustrates a subassembly for the variation lightning rod shown in Figure 1; Figure 3 illustrates the variation interruption block of Figure 1; Figure 4 illustrates the variation interruption block and the end connectors of Figure 1; Figure 5 illustrates the variation interruption block of Figure 1, wherein the end connectors are held to the variation stop block by an electrically insulating member; Figure 6 illustrates the variation interruption block of Figure 1 having female threads in accordance with one embodiment of the present invention; Figure 7 illustrates the variation interruption block of Figure 1 having male threads in accordance with another embodiment of the present invention; Figure 8 illustrates the variation interruption block of Figure 1 having male threads in accordance with yet another embodiment of the present invention; Figure 9 illustrates a plurality of screwed-in variation interruption blocks in accordance with a first plural block embodiment of the present invention; Figure 10 illustrates a plurality of variation interruption blocks threadably engaged in accordance with a second plural block embodiment of the present invention; Figure 11 illustrates a plurality of variation interruption blocks; threadably meshed in accordance with a third plural block embodiment of the present invention; and Figure 12 illustrates an isostatic press useful in forming the variation stop block of the present invention.

Detailed Description As shown in Figure 1, a variation lightning arrestor 10 includes a first terminal end 12 and a second terminal end 14. The first terminal end 12 includes a first terminal 16, which is used to electrically connect the lightning arrestor of variation 10 to a first electric line. The second terminal end 14 includes a second terminal 18, which is used to electrically connect the variation lightning arrestor 10 to a second electrical line. The first electric line can be, for example, an electrical conduction terminal which connects the first terminal 16 with a high-voltage line of an electric power distribution system, and the second electric line can be a electrical conduction terminal that connects the second terminal 18 to the ground. Alternatively, however, the first electric line may be, for example, an electrical lead terminal which connects the first terminal 16 to the ground, and the second electric line may be an electrical lead terminal that connects the second terminal 18 to a High voltage line of an electric power distribution system. The first terminal 16 is screwed into a first end connector 20, and the second terminal 18 is electrically connected into a second end connector 22 in a manner to be described later. The first and second end connectors 20 and 22 are electrically conductive and, for example, can be formed from aluminum. A variation interrupting block 24 is in electrical contact with the first and second end connectors 20 and 22. In accordance with the foregoing, a series of circuits are formed between the first and second end connectors 20 and 22. The interruption block of variation 24 can be a varistor block of metal oxide, for example, which conducts in the presence of the variations with the aim of diverting the variation energy in the electric power distribution system between the first and second terminals 16 and 18. A housing 26 of the lightning rod houses the first and ^ 3 & & ^^^^^^^ s ^^ the second end connectors 20 and 22 and the interruption block of variation 24. As is known, the housing 26 of the lightning rod can be a polymeric or porcelain housing insulator having a plurality of polymeric or porcelain water shells 28. A mounting bracket 30 is provided for the purpose of mounting and supporting the surge arrester 10 to a practical use pole or other apparatus of an electrical power distribution system. As shown in Figures 1 and 2, the second end connector 22 has a first end 32, which is in electrical contact with the variation stop block 24. The second end connector 22 also has a second end 34, which it comprises a wall 36 which forms a cavity 38. A fault disconnect 40 includes a cartridge 42, which is contained within an end 44 of the second terminal 18. The fault disconnect 40 includes a first electrically conductive washer 46 which is supported at the end 44 of the second terminal 18, a second electrically conductive washer 50 that abuts an internal wall 52 of the second end connector 22, and a resistor 54 that is sandwiched between the first and second electrically conductive washers 46 and 50. A plastic cup 56 contains the first and second electrically conductive washers 46 and 50 and the resistor 54 when the fault disconnect 40 is assembled com or is shown in Figure 1. In this way, the plastic cup 56 isolates the resistor 54 and the first and second electrically conductive washers 46 and 50 from the wall 36 of the second end connector 22 to, in this way, direct the current Failure to flow from the second end connector 22 through the second electrically conductive washer 50, through the resistor 54, through the first electrically conductive washer 46, and through the second terminal 18. In Figure 3 the variation interruption block 24 is shown. The variation interruption block 24 is provided with first and second metallized electrodes 60 and 62. The first metallized electrode 60 is electrically contacted with the first end connector 20, and the second metallized electrode 62 is electrically contacted with the second end connector 22. The first and second metallized electrodes 60 and 62 can be formed from a electrically conductive material such as copper, aluminum, zinc, silver, gold, or the like, or of any suitable electrically conductive composition such as compositions that are composed of silver, gold, platinum, palladium, and / or the like. The first and second metallized electrodes 60 and 62 can be applied to the variation stop block 24 depending on the electrode forming material. For example, if the first and second metallized electrodes 60 and 62 are formed of silver, the variation stop block 24 is cauterized after it is formed, an electrically insulating collar is applied to the variation stop block 24, then applied the first and second metallized electrodes 60 and 62 to the variation stop block 24, and then the variation stop block 24 is again cauterized. The first and second metallized electrodes 60 and 62 can be applied by means of spraying or coating. the ends of the variation stop block 24 with silver. If the threads are formed at the ends of the variation stop block 24, as will be discussed below, the ends of the variation stop block 24, including the threads, can be sprayed or coated with silver in order to form the first and second metallized electrodes 60 and 62. On the other hand, if the first and second metallized electrodes 60 and 62 are formed of aluminum, the variation stop block 24 is cauterized after it is formed, an electrically insulating collar is applied to the block. interruption of variation 24, after re-cauterizing the variation interruption block 24, and finally the first and second metallized electrodes 60 and 62 are applied to the variation stop block 24. The first and second metallized electrodes 60 and 62 can be applied by means of sprinkle the ends of the variation stop block 24 with aluminum on the arc. If filaments are formed at the ends of the variation stop block 24, the -, - ^. A. ^. ^ ^ WK¡W ™ * > - '* --- «aaa« ¿. - .. F a ** .-. * Ends of the interruption block of variation 24, including the filaments, can be sprayed in arc with aluminum, with the aim of forming the first and second metallized electrodes 60 and 62. After the first and second metallized electrodes 60 and 62 were applied to the variation stop block 24, the first and second end connectors 20 and 22 are suitably attached to the first and second metallized electrodes 60 and 62, respectively, as shown in Figure 4 For example, the first and second end connectors 20 and 22 can be attached to the first and second metallized electrodes 60 and 62, respectively, by a suitable bonding agent, such as an electrically conductive epoxy or solder. Alternatively, if the first and second end connectors 20 and 22 are not attached to the first and second metallized electrodes 60 and 62, the first and second end connectors 20 and 22 can be retained in the variation stop block 24 by means of enclosing the variation interruption block 24 and the first and second end connectors 20 and 22 in an electrically insulating material 63, as shown in Figure 5. The first and second end connectors 20 and 22 can be applied, and the material electrically insulation 63 after the last cauterization step. The electrically insulating material 63 can to be, for example, fiberglass or other suitable material, such as epoxy, that can be applied as a wrapper or that can be sprayed around the first and second end connectors 20 and 22 and the interruption block of variation 24. In this In this case, the electrically insulating material 63 acts as a support member. As a further alternative, the filaments that were formed in the variation interruption block 24, as described below, can threadably engage the corresponding filaments of the first and second end connectors 20 and 22 in order to secure the block together of interruption of variation 24 and the first and second end connectors 20 and 22. As shown in Figures 1 and 2, the wall 36 of the first and second end connectors 20 and 22 has a circumferential groove 63 about it. During the assembly of the variation lightning arrester 10, the housing 26 of the lightning arrester is applied to the subassembly comprising the variation stop block 24, the first and second metallized electrodes 60 and 62, and the first and second end connectors 20 and 22, as it is shown in Figure 1. For example, this subassembly can be inserted into the housing 26 of the lightning rod. Alternatively, the housing 26 of the lightning arrester can be molded directly onto this subassembly.

The housing 26 of the lightning rod is mounted to the mounting bracket 30 by means of inserting the wall 36 through a hole in the mounting bracket 30, as shown in Figure 1. The mounting bracket 30 may have a first cavity 64 and a second cavity 66, which are concentric with respect to each other. The second cavity 66 is defined by a generally cylindrical wall 68 of the mounting bracket 30. The generally cylindrical wall 68 may have an internal taper. As the second end connector 22 is pushed through the hole in the mounting bracket 30, a flange 70 of the second end connector 22 enters the first cavity 64 of the mounting bracket 30, and the taper of the wall 68 generally cylindrical causes an end portion 72 of the arrester housing 26 to be tightened between the generally cylindrical wall 68 and the flange 70 of the second end connector 22. As a result of this tightening action, the end portion 72 acts as a packing or seal in the second terminal end 14 for the purpose of isolating the internal part of the housing 26 from the lightning rod from the external environment. When the lightning rod housing 26 is fully pressed into the hole of the mounting bracket 30, so that the circumferential groove 63 is accessible, a spring ring (not shown) is clicked into the circumferential groove 63 in the wall 36 of the second extreme connector 22 to secure . ".". "As", a. JL. by the same the variation lightning rod 10 to the mounting bracket 30 with sufficient force to maintain the seal that was formed by the end portion 72, between the generally cylindrical wall 68 and the flange 70 of the second end connector 22. subassembly 74 (Figure 2) by inserting the second terminal 18, with the cartridge 42 that is inserted at the end 44, through the plastic cup 56, until the plastic cup 56 rests on a flange 76 ( Figure 1) of the end 44 of the second terminal 18, and by inserting the first electrically conductive washer 46 into the plastic cup 56 until the first electrically conductive washer 46 rests on the flange 76 of the end 44 of the second terminal 18. The resistor 54 is inserted into the plastic cup 56 until the resistor 54 rests on the first electrically conductive washer 46, and the second washer is placed electrically conductive 50 in the upper part of the resistor 54. The sub-assembly 74 is then inserted into the cavity 38 of the second end connector 22, until the second electrically conductive washer 50 rests on the inner wall 52, leaving a space 78 as shown in FIG. shown in Figure 1. The space 78 is filled with an encapsulating epoxy material in order to hold the subassembly 74 in electrical contact with the second end connector 22.

Instead of using a spring ring in the circumferential groove 63 of the second end connector 22 to secure the first and second end connectors 20 and 22, the variation stop block 24, and the housing 26 of the lightning arrestor to the mounting bracket 30 , the second end connector 22 can be screwed into the mounting bracket 30. As shown in Figure 1, the housing 26 of the lightning arrestor is formed on the first end connector. so as to provide a seal in cooperation with a flange 90 of the first terminal 16. This seal at the first terminal end 12 insulates the inner part of the housing 26 from the lightning rod from the external environment. Alternatively, the housing 26 of the lightning arrester can be configured with an integral 0-ring (not shown). The integral O-ring can be fitted within an annular groove (not shown) that forms around the first connector 20 in order to provide a seal at the first terminal end 12 which isolates the inner part of the housing 26 from the lightning rod external environment. During the formation of the variation interruption block 24, the variation interruption block 24 can be provided with female threads 100 at one end thereof, as shown in Figure 6. Actually, the interruption block of Variation 24 with female threads 100 in each of its ends. By way of Alternatively, the variation interruption block 24 can be provided with male threads 102 at one end thereof, as shown in FIG. 7, during the formation of the variation stop block 24. As in the case of the female threads 100, the variation stop block 24 can be provided with male threads 102 at each of its ends. As a further alternative, variation stop block 24 can be provided with male threads 102 as shown in Figure 8. Female threads 100, male threads 102, or male threads 104 can be configured to receive the corresponding threads of the first and second end connectors 20 and 22. In accordance with the above, instead of joining the first and second end connectors 20 and 22 to the variation stop block 24, or instead of retaining the first and second end connectors 20 and 22 in the variation interruption block 24 with the electrically insulating material 63, as discussed above, the first and second end connectors 20 and 22 can be retained in the variation stop block 24 by means of a threaded gear. Additionally and / or alternatively, the variation interruption block 24 can be provided with male threads at one of its ends, so that several variation interruption blocks 24 can be stackable in a threaded manner, as shown in Figure 9. As shown in FIG. Figure 9, the staples 109b of a variation stop block 24 are screwed into the female threads 100a of a variation stop block 24a, and the male threads 102c of a variation stop block are threaded into the threads female 100b of variation interruption block 24b. All variation interrupting blocks 24 of this type can have the same nominal voltage rating, so that as many variation interruption blocks 24 are stacked as necessary, as shown in Figure 9, to reach a nominal capacity of Total desired voltage. Alternatively, variation interrupting blocks 24 of this type can have a variety of voltage ratings so that the variation interruption blocks 24 can be mixed and matched to achieve a desired total voltage rating. As a further and / or alternative embodiment of the present invention, the variation interruption block 24 can be provided with female threads at both ends, so that various variation interruption blocks 24 can be stacked in a threaded manner, as shown in FIG. shown in Figure 10. As shown in Figure 10, a twisted conductive threaded spindle 106 (which may be formed from aluminum, for example) is screwed into the female threads 108d of an interruption block of variation. 24d and within the female threads 108e of a variation interruption block 24e, so that the variation interruption blocks 24d and 24e are brought into electrical contact with each other. All variation interrupting blocks 24 of this type can have the same rated voltage rating so that as many variation interruption blocks 24 are stacked as necessary, as shown in Figure 10, to achieve a nominal voltage rating. desired total. Alternatively, the variation interrupting blocks 24 of this type can have a variety of voltage ratings so that the variation interruption blocks 24 can be mixed and matched to achieve a desired total voltage rating. As still a further and / or alternative embodiment of the present invention, the variation interruption block 24 of the type shown in Figure 8 can be attached, as shown in Figure 11. As shown in Figure 11, a threaded bushing 109 (which can be formed from metal or insulating material, for example) is screwed onto the male threads 104f of a variation stop block 24f and over the male threads 104g of an interruption block of variation 24g, so that the variation interruption blocks 24f and 24g are brought into electrical contact with each other. Element 109a represents > .jr - '' h • s- ^ - ^ r--% 9 the metalized ends of the variation interruption blocks 24f the variation interruption blocks 24 of this type can have the same nominal voltage rating of so that as many variation interruption blocks 24 are stacked as necessary, as shown in Figure 11, to achieve a desired total voltage rated capacity. Alternatively, the variation interrupting blocks 24 of this type can have a variety of voltage ratings so that the variation interruption blocks 24 can be mixed and matched to achieve a desired total voltage rating. A variation interruption block having female threads 100 can be formed, as shown in Figure 6, using an isostatic press 110 as shown in Figure 12. The isostatic press 110 is well known in the art. The isostatic press 110 has end plugs 112 and 114 which have corresponding cavities 116 and 118. The cavities 116 and 118 receive the corresponding inserts 120 and 122. The insert 120 has a rod 124 which is inserted into the cavity 116 of the end plug 112. The insert 120 also has a threaded end 126 projecting into a chamber 128 of the isostatic press 110 when the end plug 112 is applied as shown. shown in Figure 12. Similarly, the insert 122 has a rod 130 which is inserted into the cavity 118 of the end plug 114. The insert 122 also has a threaded end 132 which protrudes into the chamber 128 of the isostatic press 110 when the end plug 114 is applied as shown in Figure 12. When it is going to form the variation stop block 24 using the isostatic press 110, the end plug 114 is put in place, and the chamber 128 is filled with the material to be used in the formation of the variation stop block 24. For example, if the variation stop block 24 is to be an interruption block for zinc oxide variation, the chamber 128 is filled with a mixture of a metal oxide powder and a binding agent such as polyvinyl alcohol. , wherein the binding agent is about 1 weight percent of the total mixture, although more than the binding agent could be used. Then, the end plug 112 is put in place. A pressure greater than 5000 psi (such as 9200 psi) is applied to the isostatic press 110 through an inlet tube 134 for a predetermined amount of time. After this, the isostatic press is opened and the end plugs 122 and 114 of the variation stop block 24 are removed. For this purpose, the pins 124 and 130 of the inserts 120 and 122 can be provided with the type of safety locks. ball that are used in the cap nut wrenches, in order to facilitate the removal ^ - ". • 8:. **> ''> jyfefta *. * ° - * yyy £ sk ± ^ of the end plugs 112 and 114 of the inserts 120 and 122 which, in at this point, they are still attached to the variation stop block 2. The inserts 120 and 122 of the variation stop block are then unscrewed, leaving the female threads 100 at each end of the variation stop block 24. The block can be provided Variation interruption 24 with the male threads 102 in a very similar manner, however, instead of using the inserts 120 and 122, the cavities 116 and 118 are themselves screwed in such a way that, when the pressure is applied to the isostatic press , some of the material in the chamber 128 is forced into the cavities 116 and 118. After this pressure is applied for a predetermined amount of time, the isostatic press 110 is opened and the end plugs 112 and 114 are unscrewed from the interruption block variation 24, leaving the male threads 102 at each end of the variation stop block 24. The variation stop block 24 can be provided with the male threads 104 by means of appropriately screwing the bag defining the chamber 128 which , after the pressure was applied to the isostatic press 110 through the inlet 134, it would leave impressions in the variation interruption block 24 to form the male threads 104. Certain modifications have been discussed previously. = ti ^. ^^ of the present invention ^. Other modifications will occur to those practitioners in the art of the present invention. For example, and the first end connector 20 are shown as separate elements. Instead, the first terminal 16 and the first end connector 20 can be formed as a single, electrically conductive, integrated element. Also, as described above, the variation lightning rod 10 is assembled in the following order. First, the arrester housing 26 is applied to the stack of the variation interruption block 24, which is stacked between the first and second end connectors 20 and 22. Second, this configuration is then secured to the mounting bracket 30. Third, sub-assembly 74 is applied to second end connector 22. Instead, the variation lightning arrester 10 can be assembled in any desired order. For example, the housing 26 of the lightning arrester may first be applied to the stack of the variation interruption block 24 and the first and second end connectors 20 and 22. Second, the subassembly 74 may be applied to the second extreme connector 22. Third, it is then The resulting configuration can be secured to the mounting bracket 30. Additionally, the plastic cup 56 can be formed from any type of electrically insulating material other than plastic.

In addition, an electrically conductive spring, such as a spring washer, can be inserted between the second electrically conductive washer 50 and the inner wall 52. Additionally, as described above, the first and second metallized electrodes 60 and 62, if they are silver, sprayed or coated on the variation stop block 24 and, if they are made of aluminum, they are sprayed in arc on the variation stop block 24. Instead, other application techniques can be used to apply the first and second metallized electrodes 60 and 62 to variation interruption block 24. In accordance with the foregoing, the description of the present invention should be considered as illustrative only and is for the purpose of teaching those skilled in the art, the best way of carrying out the invention. The details can be substantially varied without departing from the spirit of the invention, and exclusive use is reserved for all modifications that are within the scope of the appended claims. . *?

Claims (44)

1. CLAIMS 1. A lightning rod Variation (10) comprising a variation interruption block (24), wherein the variation interruption block (24) is made of a material, the variation lightning arrestor (10) CHARACTERIZED BECAUSE: the Variation interruption (24) has threads (100, 102, 104 and / or 108) that are formed of the material. The variation lightning rod according to claim 1, wherein the threads (100, 102, 104 and / or 108) are male threads (102 and / or 104). The variation lightning arrester according to claim 1, wherein the threads (100, 102, 104 and / or 108) are female threads (100 and / or 108). 4. The variation lightning arrester according to claim 1, wherein the variation stop block (24) has a nominal voltage capacity of at least 9 KV. 5. The variation lightning arrester according to claim 1, wherein the threads (100, 102, 104 and / or 108) are metallized. The variation lightning arrester according to claim 1, characterized in that it additionally comprises a connector (20 and / or 22) adapted to couple the variation interruption block to an electric line, wherein the | "^ # ^ W¡ ¡& i # ^^^ connector (20 and / or 22) enclosures the threads (100, 102, 104 and / or 108) of the variation interruption block (24). ). , "7. The variation lightning arrester according to claim 6, wherein the threads (100, 102, 104 and / or 108) are metallized. The variation lightning arrester according to claim 1, wherein the threads (100, 102, 104 and / or 108) comprise first and second threads (100, 102, 104 and / or 108) at the corresponding ends of the block of variation interruption (24), wherein the variation lightning arrestor (10) further comprises first and second connectors (20 and / or 22) which are adapted to couple the variation interruption block (24) between the first and second power lines; second, wherein the first connector (20 and / or 22) threadably engages the first threads (100, 102, 104 and / or 108) of the variation interruption block (24) and is adapted to electrically couple the variation interruption block (24) to the first electric line, and wherein the second connector (20 and / or 22) threadably engages the second threads (100, 102, 104 and / or 108) of the interruption block of variation (24) and is adapted to electrically couple the interruption block n of variation (24) to the second electric line. The variation lightning rod according to claim 8, wherein the threads (100, 102, 104 and / or 108) t &ja sctoa.- »JÜ» ^,. _. mMmami ± .-. , __. ^ "_, ..,". ^. ^ tat ^ are metallized. The variation lightning arrester according to claim 1, characterized in that it additionally comprises: a first connector (20 and / or 22) in electrical contact with a first end of the variation interruption block (24); a second connector (20 and / or 22) in electrical contact with a second end of the variation interruption block (24); and a disconnect (40) in electrical contact with the second connector (20 and / or 22) and which is configured to disconnect the variation lightning arrestor (10) from the electrical lines in the event of a failure in the variation interruption block (24) The variation lightning arrester according to claim 10, wherein the variation interruption block (24) has first and second metallized ends. The variation lightning rod according to claim 1, characterized in that it additionally comprises a housing (26) of the electrically insulating lightning arrester, wherein the housing (26) of the electrically insulating lightning arrestor accommodates the variation interruption block (24) and no another block of variation interruption. 13. The surge arrester in accordance with the claim 12, in? s í the variation interruption block (24) has a nominal voltage capacity of at least 9 KV. 14. The variation lightning arrester according to claim 12, characterized in that it additionally comprises a connector (20 and / or 22) that is adapted to couple the variation interruption block (24) to an electric line, wherein the connector (20 and / or 22) threadably couples the threads (100, 102, 104, and / or 108) of the variation interruption block (24). 15. The variation lightning arrester according to claim 14, wherein the threads (100, 102, 104 and / or 108) are metallized. The variation lightning arrestor according to claim 12, wherein the threads (100, 102, 104 and / or 108) comprise first and second threads (100, 102, 104, and / or 108) at the corresponding ends of the variation interruption block (24), wherein the variation lightning arrestor (10) further comprises first and second connectors (20 and / or 22) which are adapted to couple the variation interruption block (24) between the first and second electrical lines, wherein the first connector (20 and / or 22) threadably couples the first threads of the variation interruption block (24) and is adapted to electrically couple the block interruption of variation (24) to the first electric line, and • - * .. rf¡a .. c- -? ~. sata ** -._ "* - A and /» - m ^^, i "* _. ,. ¿Z mkm, * '^^ .. ^ a ^ a ^ yft fef ^ -. "^ Wherein the second with $ ctor (20 and / or 22) engages the threads screw-way second block interruption of variation (24) and is adapted to engage electrically the variation interruption block (24) to the second power line. 17. the variation arrester according to claim 16, wherein the threads (100, 102, 104 and / or 108) are metallized 18. The variation lightning arrester according to claim 16, characterized in that it additionally comprises a disconnector (40) in electrical contact with the second connector (20 and / or 22) and that configured to disconnect the arrester variation (10) of the power line in the event of a failure in the interruption block of variation (24). 19. the variation arrester according to claim 1, wherein the interruption block of variation (24) is a first variation interruption block (24a, 24b) , and / or 24c), wherein the variation lightning arrestor (10) further comprises a second variation interruption block (24a, 24b, and / or 24c) that is made of the material, wherein the second variation stop block (24a, 24b, and / or 24c) has threads (100, 102, 104, and / or 108) formed of the material of the second block of interruption of variation (24a, 24b, and / or 24c), and wherein the threads (100, 102, 104, and / or 108) of the first and second "variation interruption blocks" (24a, 24b, and / or 24c) are threadably engaged in order to provide support for the variation lightning arrestor (10) without the use of a support member. 20. The variation lightning arrester according to claim 19, wherein the threads (100, 102, 104 and / or 108) that are formed of the material of the first variation interruption block (24a, 24b, and / or 24c) are the first threads (100, 102, 104, and / or 108) of the first variation interruption block (24a, 24b, and / or 24c), wherein the threads (100, 102, 104 and / or 108) that are formed of the material of the second block of interruption of variation (24a, 24b, and / or 24c) are first threads (100, 102, 104 and / or 108) the second block of interruption of variation (24a, 24b, and / or 24c), wherein the first variation interruption block (24a, 24b, and / or 24c) has second threads (100, 102, 104, and / or 108) that are formed from the material of the first variation stop block (24a, 24b, and / or 24c), wherein the second variation interruption block (24a, 24b, and / or 24c) has second threads (100, 102, 104, and / or 108) that are formed from the material of the second block of interest variation variation (24a, 24b, and / or 24c), wherein the second threads (100, 102, 104, and / or 108) of the first variation interruption block (24a, 24b, and / or 24c) engage threaded a first connector (20 and / or 22), wherein the second threads (100, 102, 104, and / or 108) of the second block of variation interruption (24a, 24b, and / or 24c) threadably engage a second connector (20 and / or 22), and wherein the first and second blocks of variation interruption (24a, 24b, and / or 24c) ) are interconnected electrically through 5, the first threads (100, 102, 104 and / or 108) the first block of interruption of variation (24a, 24b, and / or 24c) and the first threads (100, 102, 104, and / or 108) of the second variation interruption block (24a, 24b, and / or 24c). 21. The surge arrestor in accordance with the 10 claim 20, wherein the first threads (100, 102, 104 and / or 108) of the first and second variation interruption blocks (24a, 24b, and / or 24c) are female threads (100 and / or 108), and wherein a threaded rod (106) threadably engages the first female threads (100 and / or 108) of the first 15 and second variation interruption blocks (24a, 24b, and / or 24c), with the aim of providing support for the variation lightning arrestor (10) without the use of a support member. 22. The surge arrester in accordance with the 20 claim 20, wherein the first threads (100, 102, 104 and / or 108) of the first and second variation interruption blocks (24a, 24b, and / or 24c) are male threads (104) that are formed around an outer perimeter of the first and second interruption blocks of variation (24a, 24b, and / or 24c), and in 25 where a threaded bushing (109) threadably engages the The first male threads (104) of the first and second interruption blocks of variation (24a, 24b, and / or 24c) with the aim of providing support for the variation lightning rod (10). ) without the use of a support member. The variation lightning arrester according to claim 20, wherein the first threads (100, 102, 104 and / or 108) of the first variation interruption block (24a, 24b, and / or 24c) are male threads ( 102, and / or 104), wherein the first threads (100, 102, 104, and / or 108) of the second variation interruption block (24a, 24b, and / or 24c) are female threads (100 and / or 108), and wherein the male and female threads (100, 102, 104, and / or 108) of the first and second variation interruption blocks (24a, 24b, and / or 24c) are threadably engaged in order to provide the support for the variation lightning arrestor (10) without the use of a support member The variation lightning arrester according to claim 19, wherein the threads (100, 102, 104 and / or 108) of the first and second variation interruption blocks (24a, 24b, and / or 24c) are female threads (100 and / or 108), and wherein a threaded rod (106) threadably couples the female threads (100 and / or 108) of the first and second variation interruption blocks (24a, 24b, and / or 24c) in order to provide support for the variation lightning arrestor (10) without the use of a support member. 25. The variation lightning arrester according to claim 19, wherein the threads (100, 102, 104 and / or 108) of the first and second variation stop blocks. (24a, 24b, and / or 24c) are male threads (104) that are formed around an outer perimeter of the first and second variation interruption blocks (24a, 24b, and / or 24c), and wherein a threaded bushing (109) threadably engages the first male threads (104) of the first and second variation interruption blocks (24a, 24b, and / or 24c) in order to provide the support for the variation lightning arrestor (10) without the use of a support member. 26. The variation lightning arrester according to claim 19, wherein the threads (100, 102, 104 and / or 108) of the first variation stop block (24a, 24b, and / or 24c) are male threads (102). and / or 104), wherein the threads (100, 102, 104, and / or 108) of the second variation interruption block (24a, 24b, and / or 24c) are female threads (100 and / or 108), and wherein the male threads (102 and / or 104) of the first variation interruption block (24a, 24b, and / or 24c) threadably engage the female threads (100 and / or 108) of the second interruption block of variation (24a, 24b, and / or 24c) for the purpose of providing support for the variation lightning rod (10) without the use of a support member. 27. The variation lightning arrester according to claim 1, characterized in that it further comprises an electrically insulating collar (62) around the variation interruption block (24). 28. The variation lightning arrester according to claim 27, characterized in that it further comprises first and second connectors (20 and / or 22) that are adapted to couple the variation interruption block (24) between the first and second corresponding electric lines. . 29. The variation lightning arrester according to claim 28, wherein the electrically insulating collar (62) is configured to support the first and second connectors (20 and / or 22) to the variation interruption block (24). 30. The variation lightning rod according to claim 28, wherein the first and second connectors (20 and / or 22) are joined to the variation interruption block (24). 31. The variation surge arrester according to claim 28, wherein the first and second connectors (20 and / or 22) threadably engage the threads of the variation interruption block (24). 32. The variation lightning arrester according to claim 27, characterized in that it further comprises a disconnector (40) in electrical contact with the second connector (20 and / or 22) and configured to disconnect the variation lightning arrester (10) from an electric line in the case of a failure in the variation interruption block (24). 33. The variation lightning arrester according to claim 27, wherein the variation interruption block (24) is a first variation stop block (24a, 24b, and / or 24c), wherein the variation lightning arrestor (10) further comprises a second variation interruption block (24a, 24b, and / or 24c) that is made of the material, wherein the second block of interruption of variation (24a, 24b, and / or 24c) has threads (100, 102, 104, and / or 108) that are formed of the material, wherein the threads (100, 102, 104, and / or 108) of the first and second variation interruption blocks (24a, 24b, and / or 24c) are female threads (100 and / or 108), and wherein a threaded rod (106) threadably meshes the female threads (100 and / or or 108) of the first and second variation interruption blocks (24a, 24b, and / or 24c) in order to provide support for the variation lightning arrestor (10) without the use of a support member. 34. The variation lightning arrester according to claim 27, wherein the variation interruption block (24) is a first variation interruption block (24a, 24b, and / or 24c), wherein the variation lightning arrester ( 10) further comprises a second variation interruption block (24a, 24b, and / or 24c) that is made of the material, wherein the second variation interruption block (24a, 24b, and / or 24c) has threads (100 , 102, 104, and / or 108) that are formed of the material, wherein the threads (100, 102, 104, and / or 108) of the "FeHsfaalts8i? > The first and second variation interruption blocks (24a, 24b, and / or 24c) are male threads (104) that are formed around an outer perimeter of the first and second variation interruption blocks (24a, 24b, and / or 24c), and wherein a threaded bushing (109) threadably couples the first male threads (104) of the first and second variation interruption blocks (24a, 24b, and / or 24c) in order to provide the support for the variation lightning arrestor (10) without the use of a support member. 35. The variation lightning arrester according to claim 27, wherein the variation interruption block (24) is a first variation interruption block (24a, 24b, and / or 24c), wherein the variation lightning arrester ( 10) further comprises a second variation interruption block (24a, 24b, and / or 24c) that is made of the material, wherein the second variation interruption block (24a, 24b, and / or 24c) has threads (100 , 102, 104, and / or 108) that are formed of the material, wherein the threads (100, 102, 104, and / or 108) of the first variation interruption block (24a, 24b, and / or 24c) are male threads (102 and / or 104), wherein the threads (100, 102, 104, and / or 108) of the second variation interruption block (24a, 24b, and / or 24c) are female threads (100 and / or or 108), and wherein the male threads (102 and / or 104) of the first variation interruption block (24a, 24b, and / or 24c) threadably engage the female threads (100 and / or 108) of the second t., aasJIKfes' ^ ¿»variation interruption block (24a, 24b, and / or 24c) with the aim of providing support for the variation lightning arrestor (10) without the use of a support member. 36. A method for forming the surge arrester 5 of claim 1 comprising the following steps: a) placing the material in an isostatic press (110) to form the variation interruption block (24); b) placing the threads in the isostatic press (110), and; C) controlling the isostatic press (110) with a pressure / time profile that is configured to join the material together, in order to form the variation interruption block (24) having threads (100, 102, 104, and / or 108) that are formed of the material. 15 37. The method of compliance with the claim 36, wherein step a) comprises the step of placing metal oxide material in the isostatic press (110), to form the voltage interruption block (24). 38. The method of compliance with the claim 20 36, wherein step b) comprises the step of placing a male threaded member (120 and / or 122) in the isostatic press (110) so that, when step c) is performed, the female threads are formed ( 100 and / or 108) in the voltage interruption block (24) 25 39. The method in accordance with the claim j ^ "^^ e ^^^ ==" ______________________ l____________s___ ^ fcMtogfea 36, wherein step b) comprises the step of placing a female threaded member in the isostatic press (110) so that, when step c) is performed , the male threads (102 and / or 104) are formed in the voltage interruption block (24). 40. The method according to claim 36, characterized in that it further comprises the step of placing an electrical connector (20 and / or 22) in the isostatic press (110) before step b), so that when it is performed step c), the variation interruption block (24) is formed with the electrical connector as a part thereof. 41. The method according to claim 36, characterized in that it further comprises the steps of: cauterizing the variation interruption block (24); 15 applying a collar (63) to the variation interruption block (24); applying metal electrodes (60 and / or 62) to the variation interruption block (24); and cauterize the variation interruption block 20 (24). 42. The method according to claim 41, wherein the step of applying the metal electrodes (60 and / or 62) to the variation interruption block (24) comprises the step of applying silver electrodes to the interruption block. 25 of variation (24). ^^ t ^^^^ ^^^^^^^ ^^ ¡¡¡¡¡¡¡¡¡^ ^ ^ ^ ^ ^^^^ M? iL 43. The method according to claim 36, characterized in that it further comprises the steps of: cauterizing the variation interruption block (24); applying a collar (63) to the variation interruption block (24); cauterize the variation interruption block (24); and applying metal electrodes (60 and / or 62) to the variation interruption block (24). 44. The method according to claim 43, wherein the step of applying the metal electrodes (60 and / or 62) to the variation interruption block (24), comprises the step of applying aluminum electrodes to the interruption block. of variation (24). &