JP2012161156A - Gas insulation switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas insulation switchgear which can be used for an electric power system having an increased capacity and achieves further reduction in the size and the weight.SOLUTION: According to the embodiment, a gas insulation switchgear includes: a sealed container 1 enclosing an insulative gas 2 and a contact piece 3 provided in the sealed container 1 and used for energization. The contact piece 3 has a center base material 3a and an outer peripheral material 3b provided on an outer peripheral surface of the center base material 3a and having higher conductivity than that of the center base material 3a. The outer peripheral material 3b is formed by the cold spray method.

Description

  Embodiments described herein relate generally to a gas insulated switchgear in which an insulating gas is sealed inside a sealed container.

  Conventionally, as a cylindrical contact used in a gas insulated switchgear in a power system, for example, one having a structure as shown in FIG. 5 is used. As shown in FIG. 5, an insulating gas 2 is sealed inside the sealed container 1. A contact 3 is provided on the insulating spacer 7 connected to the sealed container 1. The contact 3 is connected to the conductor 4 via the finger 5. The insulating spacer 7 has a function of insulating the contactor 3 to be energized and the sealed container 1 and supporting the contactor 3.

  Usually, the contact 3 is formed in a solid cylindrical shape. Generally, in order to increase an energization current, the contact 3 is changed to a material having high conductivity, or the contact 3 is increased in diameter so that the contact 3 The electrical resistance is lowered to suppress heat generation, or the surface area of the sealed container 1 is increased to enhance the heat dissipation effect, or a structure as shown in FIG. 6 is used.

  That is, the contact 3 in the sealed container 1 shown in FIG. 6 includes a lightweight central base material 3a and a hollow outer peripheral material 3b having a higher conductivity than the central base material 3a. The outer peripheral material 3b with respect to the center base material 3a is configured to be pressed by a spring or to be conducted through a slide contact 8 that is electrically connected by its own spring property. Thus, the contactor 3 uses only the outer peripheral material 3b through which a large amount of current flows due to the skin effect of the alternating current as a material having high conductivity.

  As an example, the conductor of the gas insulated switchgear has a structure as shown in FIG. As shown in FIG. 7, an insulating gas 2 is sealed inside the sealed container 1. A contact 3 is provided on the insulating spacer 7 connected to the sealed container 1. The contact 3 is connected to the conductor 4 via the finger 5. The insulating spacer 7 has a function of insulating the contact 3 to be energized and the sealed container 1. In the gas insulated switchgear, a plurality of sealed containers 1 and conductors 4 having such a structure are connected in the axial direction via insulating spacers 7 provided with contacts 3.

  Normally, the conductor 4 is formed in a hollow or solid cylindrical shape, and a single conductor of aluminum alloy or the like is used. The conductor described in Patent Document 1 is composed of a solid round bar-shaped central member made of aluminum and a pipe-shaped outer peripheral member made of copper.

  As an example of the current-carrying member that slides in the gas-insulated switchgear, a member having a structure as shown in FIG. 8 is used. FIG. 8 shows a state during energization. As shown in FIG. 8, an insulating gas 2 is sealed inside the sealed container 1. The inside of the sealed container 1 is divided into a fixed part whose position does not change by opening and closing operations of closing and closing and a movable part member whose position changes. The movable part includes a main contact 9, a puffer cylinder 10, and an arc contact 19. The fixed part includes a fixed support 12, a finger 13, an arc contact 18, and a current-carrying support 11.

  In the state at the time of energization in FIG. 8, the finger 13, the main contact 9, the puffer cylinder 10, the finger 15, and the energization support 11 are electrically connected in order from the fixed support 12. When the gas insulated switchgear receives the opening command signal, the position of the movable part changes, the finger 13 of the fixed part and the main contact 9 of the movable part are disconnected, and the arc contact 18 for inducing an arc, the arc It is electrically disconnected by the contact 19. The current-carrying surface with the finger 15 of the puffer cylinder 10 and the current-carrying surface with the finger 13 of the main contactor 9 are plated to reduce contact resistance.

  As an example, the arc contact 18 shown in FIG. 8 has a structure as shown in FIG. As shown in FIG. 9, the arc contact 18 has an arc-resistant piece 17 bonded to a base metal 16 by a different material bonding method such as friction welding, brazing, vacuum brazing, or electron beam.

JP 2008-211193 A

  By the way, in the gas insulated switchgear described above, there is a strong demand for downsizing and cost reduction of the device. At a small current, a lightweight, high-conductivity aluminum alloy or the like is used as a material for the contact of the gas-insulated switchgear.

  On the other hand, in the case of a large current, in the gas insulated switchgear shown in FIG. 5, there is a means of replacing the material of the contact 3 with a single material of a copper alloy that is a higher conductive material than an aluminum alloy in order to reduce electrical resistance. is there.

  If the copper alloy is replaced with a single material in this way, the specific gravity of the material of the contact 3 increases, and the weight increases. Since the load of the contact 3 is applied to the insulating spacer 7, it is necessary to increase the strength of the insulating spacer 7, and there is a problem that the gas insulated switchgear using the insulating spacer 7 is enlarged.

  Further, there is a means that an alternating current utilizes the characteristic of energizing biased toward the outer peripheral side, using an aluminum alloy for the central base material, and using a copper alloy for the outer peripheral material only in a thickness necessary for the current carrying capacity. As such means, for example, there is a technique described in Patent Document 1 shown in FIG. In this technique, an aluminum central base material 3a is used for the inner diameter, and a copper outer peripheral material 3b is used for the outer diameter. The outer peripheral material 3 b and the central base material 3 a are electrically connected by a slide contact 8. However, the technique described in Patent Document 1 has a problem that the number of parts increases and the number of manufacturing steps increases because the structure is complicated.

  In addition, although a thermal spray alloy composite material has been devised to spray high temperature particles on the central substrate, this thermal spray includes oxides generated during film formation, and it is difficult to form a dense thick film. There is a manufacturing problem.

  In the structure of the three-phase collective gas-insulated switchgear shown in FIG. 7, the conductor 4 using an aluminum alloy has a length of several meters or more, so that it is caused by gravity from the end toward the center. The sagging increases and the maximum deflection occurs at the center. That is, the distance between the conductor 4 and the sealed container 1 is the shortest in the direction of gravity at the center of the conductor 4, and it is easy to ground the sealed container 1.

  Further, when a large electromagnetic force acts between the conductors 4 when a short-circuit current is applied, the conductors 4 vibrate and decenter from the normal position. Therefore, when the insulation distance cannot be maintained between the conductors 4, a short circuit between phases occurs, and when the insulation distance cannot be maintained between the conductor 4 and the sealed container 1, a ground fault occurs. As a structure for maintaining the insulation distance in order to prevent these inter-phase short-circuits and ground faults, there are means for reinforcing the conductor 4 to a strength that is difficult to bend and means for reducing the influence of the deflection of the conductor 4.

  Specifically, the former means is to increase the diameter of the conductor 4, shorten the total length of the conductor 4 to shorten the distance between the supports of the conductor 4, and the latter means to increase the diameter of the sealed container 1. It is. The shortening of the total length of the conductor 4 causes an increase in the number of the conductors 4, the insulating spacers 7, and the sealed containers 1, and as a result, the cost increases due to an increase in the number of components. Moreover, the enlargement of the conductor 4 and the sealed container 1 has the problem that an apparatus will enlarge.

  In the puffer cylinder 10 which is a sliding energization member shown in FIG. 8, the energization surface sliding with the finger 15 is provided with a silver plating layer of several tens of μm for the purpose of reducing contact resistance. This silver-plated layer on the current-carrying surface may be worn by sliding with the fingers 15 due to many opening / closing operations, and the contact resistance may increase.

  In the main contactor 9 shown in FIG. 8, a portion that comes in contact with and separates from the finger 13 at the time of opening and closing is damaged.

  Further, since the arc contact 18 shown in FIG. 8 is worn by the arc at the time of current switching, as shown in FIG. 9, the arc contact 18 is composed of an arc-resistant piece 17 and a base metal 16 having a high melting point and high resistance to arc. It is manufactured by friction welding using frictional heat generated by pressure or by electron beam. These joining methods have a design and production problem due to restrictions on the shapes to be joined.

  The present invention has been made in consideration of the above-described circumstances, and an object of the present invention is to provide a gas insulated switchgear that is further reduced in size and weight in response to an increase in capacity of an electric power system.

  In order to achieve the above object, a gas insulated switchgear according to an embodiment includes a sealed container filled with an insulating gas, and a contact provided in the sealed container and energized. The contact has a central base material and an outer peripheral material that is provided on the outer peripheral surface of the central base material and has higher conductivity than the central base material, and the outer peripheral material is formed by a cold spray method.

  The gas insulated switchgear according to the embodiment includes a sealed container filled with an insulating gas and a conductor provided in the sealed container. The conductor has a central base material and an outer peripheral material provided on an outer peripheral surface of the central base material and having a smaller elastic modulus than the central base material, and the outer peripheral material is formed by a cold spray method.

  Furthermore, the gas-insulated switchgear according to the embodiment includes a sealed container in which an insulating gas is sealed, and a current-carrying member that is provided in the sealed container and slides. The energization member has a central base material and an outer peripheral material that is provided on an outer peripheral surface of the central base material and has a higher conductivity than the central base material, and the outer peripheral material is formed by a cold spray method. .

  The gas-insulated switchgear according to the embodiment includes a sealed container in which an insulating gas is sealed, a movable part and a fixed part that are arranged in the sealed container so as to be able to contact and separate from each other, and the movable part and the fixed part are in contact with each other. A main contact that conducts electricity separately is provided, and an arc contact that induces an arc when the current is interrupted. The main contact has a central base material and an outer peripheral material provided on an outer peripheral surface of the central base material and having higher conductivity than the central base material, and the outer peripheral material is formed by a cold spray method. Yes.

  The gas-insulated switchgear according to the embodiment includes a sealed container filled with an insulating gas, a movable part and a fixed part disposed in the sealed container so as to be able to contact and separate from each other, and the movable part and the fixed part are in contact with each other. A main contact that conducts electricity separately is provided, and an arc contact that induces an arc when the current is interrupted. The arc contact has a central base material and an outer peripheral material having a melting point higher than that of the central base material on the outer peripheral surface of the central base material, and the outer peripheral material is formed by a cold spray method.

It is sectional drawing which shows the contact of 1st Embodiment of the gas insulated switchgear which concerns on this invention. It is sectional drawing which shows the conductor of 2nd Embodiment of the gas insulated switchgear which concerns on this invention. In 3rd Embodiment and 4th Embodiment of the gas insulated switchgear which concern on this invention, it is sectional drawing which shows the main contact and arc contact which contact / separate as an electricity supply member which slides. It is sectional drawing which shows the arc contactor of 5th Embodiment of the gas insulated switchgear which concerns on this invention. It is sectional drawing which shows an example of the contact in the conventional gas insulated switchgear. It is sectional drawing which shows an example of the electricity supply member in the conventional gas insulated switchgear. It is sectional drawing which shows an example of the conductor in the conventional gas insulated switchgear. In the conventional gas insulated switchgear, it is sectional drawing which shows an example of the main contactor which contacts and separates as an electricity supply member which slides, and an arc contactor. It is sectional drawing which shows an example of the arc contact in the conventional gas insulated switchgear.

  Below, each embodiment of the gas insulation switchgear concerning the present invention is described with reference to drawings.

  In the following embodiments, the same or corresponding parts as those in the conventional configuration will be described with the same reference numerals.

(First embodiment)
(Constitution)
FIG. 1 is a sectional view showing a contact of a gas insulated switchgear according to a first embodiment of the present invention.

  As shown in FIG. 1, an insulating gas 2 is sealed inside the sealed container 1. An insulating spacer 7 is connected to the sealed container 1, and a contact 3 is provided at the center of the insulating spacer 7. The contact 3 is connected to the conductor 4 via the finger 5. The insulating spacer 7 has a function of insulating the contactor 3 to be energized and the sealed container 1 and supporting the contactor 3. The insulating spacer 7 is made of an insulating material such as an epoxy resin.

  In the contact 3, an outer peripheral material 3 b having a higher conductivity than the central base material 3 a is formed on the outer peripheral surface of the central base material 3 a with a uniform thickness by a cold spray method. The thickness of the outer peripheral material 3b is 100 μm or more which cannot be formed by normal plating. The thickness of the outer peripheral material 3b is set based on the weight of the conductor 4 and the current carrying capacity.

  Specifically, in this embodiment, inexpensive and lightweight aluminum or aluminum alloy is used for the center base material 3a of the contact 3, and copper or copper alloy having relatively low conductivity and high conductivity is used for the outer peripheral material 3b. Yes.

  The cold spray method is a method of causing the powder to collide with the central substrate 3a without melting the powder, the carrier gas temperature is low, the reaction in an inert gas atmosphere, the surface of the central substrate 3a and the powder are Since there is no alteration due to heat or oxidation, a dense and thick film can be formed.

  That is, the cold spray method is a method in which a powder is collided with the central base material 3a in a low-temperature inert gas atmosphere and coating is performed, and a dense film is formed without generating oxides that are problematic in thermal spraying. It is possible to form a thicker film than plating.

(Function and effect)
In the present embodiment, by forming the outer peripheral material 3b of the high conductivity material on the outer peripheral surface of the central base material 3a, the ratio of the flowing current biased to the outer peripheral material 3b of the contactor 3 is increased due to the skin effect. Therefore, it is possible to reduce the electrical resistance of the contact 3.

  As described above, according to this embodiment, in order to pass a large current, instead of using a single material that is generally heavy and highly conductive, a coating by a cold spray method is formed on the contact 3. Thus, a light contact structure having a high current-carrying capacity can be obtained, and an increase in the size of the insulating spacer 7 can be avoided, and a compact and economical gas-insulated switchgear can be provided.

  In addition, according to the present embodiment, inexpensive and lightweight aluminum or aluminum alloy is used for the center base material 3a of the contact 3, and copper or copper alloy having relatively high conductivity and high conductivity is used for the outer peripheral material 3b. Therefore, it is possible to provide a contact portion structure that is inexpensive, lightweight, and has high energization capability.

(Modification of the first embodiment)
In the first embodiment, copper or a copper alloy is used for the outer peripheral material 3b. However, in this modified example, silver or a silver alloy having a higher conductivity than copper is used for the outer peripheral material 3b, although it is relatively expensive. Used.

  As described above, according to this modified example, by using silver or a silver alloy for the outer peripheral material 3b, it is possible to obtain a contact portion structure that is lightweight and has a higher current-carrying capacity than the first embodiment.

(Second Embodiment)
(Constitution)
FIG. 2 is a cross-sectional view showing a conductor of a second embodiment of the gas insulated switchgear according to the present invention.

  In the present embodiment, as in the first embodiment, as shown in FIG. 2, the insulating gas 2 is sealed inside the sealed container 1. An insulating spacer 7 is connected to the sealed container 1, and a contact 3 is provided at the center of the insulating spacer 7. The contact 3 is connected to the conductor 4 via the finger 5. The insulating spacer 7 has a function of insulating the contactor 3 to be energized and the sealed container 1 and supporting the contactor 3.

  In the gas insulated switchgear according to the present embodiment, a plurality of sealed containers 1 and conductors 4 having the above-described structure are connected via an insulating spacer 7 including a contact 3.

  The conductor 4 has an outer peripheral surface 4b having a conductivity higher than that of the central base material 4a formed on the outer peripheral surface of the central base material 4a having a higher elastic modulus than that of the outer peripheral material by a cold spray method.

  Specifically, in the present embodiment, iron or steel is used for the central base material 4a, and aluminum or aluminum alloy that is relatively inexpensive, lightweight, and has a relatively high conductivity is used for the outer peripheral material 4b.

(Function and effect)
In the present embodiment, the conductor 4 is a composite material obtained by cold spraying the outer peripheral material 4b having a higher conductivity than the central base material 4a on the central base material 4a having a higher elastic modulus than the conventional single conductor. In addition, the conductor 4 having high bending rigidity and excellent current-carrying performance can be configured. Therefore, it is possible to suppress the maximum deflection due to gravity at the center of the conductor 4 and the deflection due to the electromagnetic force generated between the conductors 4 between the phases when a short-circuit current is applied.

  Thus, according to this embodiment, since the bending of the conductor 4 is suppressed, the insulation distance between the conductor 4 and the sealed container 1 can be sufficiently maintained, and thus the sealed container 1 can be reduced in size. . Further, since the conductor 4 has higher bending rigidity than the central base material 4a, it is difficult to bend even if the entire length of the conductor 4 is formed long, and the insulation distance between the conductor 4 and the sealed container 1 can be sufficiently maintained. Therefore, the number of the contact 3, the insulating spacer 7, and the sealed container 1 can be reduced, and the economy is improved.

  Further, in this embodiment, iron or steel is used for the central base material 4a, and aluminum or aluminum alloy having a relatively low cost, light weight, and relatively high conductivity is used for the outer peripheral material 4b. The conductor 4 excellent in current-carrying performance can be configured.

(Modification of the second embodiment)
In the second embodiment, aluminum or an aluminum alloy is used for the outer peripheral material 3b. However, in this modification, copper or a copper alloy having a high conductivity is used for the outer peripheral material 3b, although it is relatively more expensive than aluminum. Thus, energization with a larger current becomes possible.

(Third embodiment)
(Constitution)
FIG. 3 is a cross-sectional view showing a main contactor and an arc contactor that come in contact with and separate from each other as sliding current-carrying members in the third and fourth embodiments of the gas insulated switchgear according to the present invention.

  As shown in FIG. 3, an insulating gas 2 is sealed inside the sealed container 1. The inside of the sealed container 1 is divided into a fixed part whose position does not change by opening and closing operations of closing and closing and a movable part member whose position changes. The movable part includes a main contact 9, a puffer cylinder 10, and an arc contact 19. The fixed part includes a fixed support 12, a finger 13, an arc contact 18, and a current-carrying support 11. The main contactor 9 and the puffer cylinder 10 constitute an energizing member of this embodiment.

  In the state during energization in FIG. 3, the finger 13, the main contact 9, the puffer cylinder 10, the finger 15, and the energization support 11 are electrically connected in order from the fixed support 12. When the gas-insulated switchgear according to the third embodiment receives an opening command signal, the position of the movable part changes, the finger 13 of the fixed part and the main contactor 9 of the movable part are separated, and an arc that induces an arc Electrically interrupted by the contact 18 and the arc contact 19.

  In the third embodiment, the portion that is energized while sliding with the finger 15 of the puffer cylinder 10 is formed on the outer peripheral surface of the central base material 10a on the outer peripheral material 10b having higher conductivity than the central base material 10a by the cold spray method. It is formed to a uniform thickness.

  As described in the first embodiment, the cold spray method is a method of causing the powder to collide with the central base material 10a without melting, the carrier gas temperature is low, and the reaction is performed in an inert gas atmosphere. In addition, since the surface of the central substrate 10a and the powder are not deteriorated by heat or oxidation, a dense and thick film can be formed as compared with conventional plating.

  Specifically, in the third embodiment, inexpensive and lightweight aluminum or aluminum alloy is used for the central base material 10a, and copper or copper alloy having relatively low conductivity and high conductivity is used for the outer peripheral material 10b.

(Function and effect)
In the present embodiment, the outer peripheral material 10b having a higher conductivity than the central base material 10a is formed on the central base material 10a by the cold spray method. Since the outer peripheral material 10b is a thick film, the outer peripheral material 10b can be maintained for a long time.

  As described above, according to the present embodiment, the coating of the puffer cylinder 10 is maintained even after many opening and closing operations, and the electrical resistance can be kept low. An economical gas insulated switchgear can be provided.

  In addition, according to the present embodiment, by using cheap and light aluminum or aluminum alloy for the central base material 10a and using copper or copper alloy having a relatively low cost and high conductivity for the outer peripheral material 10b, the light weight and current carrying capacity can be obtained. Therefore, the operation energy for driving the movable portion can be reduced, and a compact and economical gas insulated switchgear can be provided.

(Modification of the third embodiment)
In the third embodiment, copper or a copper alloy having a relatively low cost and high conductivity is used for the outer peripheral material 10b. However, in the present modification, the outer peripheral material 10b is relatively expensive, but is more expensive than copper. Silver or silver alloy having high conductivity is used.

  As described above, according to this modified example, by using silver or a silver alloy for the outer peripheral material 10b, it is possible to configure a sliding energizing member that has a higher energizing capability than the third embodiment.

(Fourth embodiment)
(Constitution)
Next, a fourth embodiment of the gas insulated switchgear according to the present invention will be described with reference to FIG. In FIG. 3, the configuration and operation of the fixed portion and the movable portion provided inside the sealed container 1 are the same as those in the third embodiment, and a description thereof will be omitted.

  In the present embodiment, in the energizing surface with the finger 13 of the main contact 9 as the energizing member, the outer peripheral material 9b having higher conductivity than the central base material 9a is formed on the outer peripheral surface of the central base material 9a by the cold spray method. It is formed to a uniform thickness.

  Specifically, in the present embodiment, inexpensive and light aluminum or aluminum alloy is used for the central base material 9a, and copper or copper alloy having relatively low conductivity and high conductivity is used for the outer peripheral material 9b.

(Function and effect)
In the present embodiment, the outer peripheral material 9b having a higher conductivity than the central base material 9a is formed on the central base material 9a by the cold spray method, so that it can be damaged due to contact / separation during many opening and closing operations. Since the outer peripheral material 9b is a thick film, the outer peripheral material 9b can be maintained for a long time.

  As described above, according to the present embodiment, the outer peripheral material 9b of the main contactor 9 is maintained for a long period of time even after many opening and closing operations, and the electrical resistance can be kept low. 9 can extend the life, and an economical gas insulated switchgear can be provided.

  In addition, according to the present embodiment, by using cheap and light aluminum or aluminum alloy for the central base material 9a and using copper or copper alloy having a relatively low cost and high conductivity for the outer peripheral material 9b, the light weight and current carrying capacity can be obtained. Since the main contactor 9 having a high height can be formed, the operation energy for driving the movable portion can be reduced, and a compact and economical gas insulated switchgear can be provided.

(Modification of the fourth embodiment)
In the fourth embodiment, copper or copper alloy having relatively low conductivity and high conductivity is used for the outer peripheral material 9b. However, in the present modification, the outer peripheral material 9b is relatively expensive, but copper or copper. Silver or a silver alloy having higher conductivity than the alloy is used.

  As described above, according to the present modified example, by using silver or a silver alloy for the outer peripheral material 9b, the main contactor 9 that comes in contact with and separates from the fourth embodiment and has higher energization capability than the fourth embodiment can be configured. .

(Fifth embodiment)
(Constitution)
FIG. 4 is a sectional view showing an arc contact of a fifth embodiment of the gas insulated switchgear according to the present invention.

  As shown in FIG. 4, in the arc contact 18 of the present embodiment, an outer peripheral material 18b having a melting point higher than that of the central base material 18a is formed on the outer peripheral surface of the central base material 18a to have a uniform thickness by a cold spray method. Has been. The outer peripheral member 18b is formed thicker than the above embodiments because the arc contact 18 is ignited by a high-temperature arc.

  Specifically, in this embodiment, an inexpensive iron or steel material is used for the central base material 18a, and a high melting point arc-resistant piece material typified by a tungsten-copper alloy or the like is used for the outer peripheral material 18b. In general, a high melting point material represented by tungsten has low electrical conductivity. Therefore, a high melting point material containing a highly conductive material such as silver or copper is excellent in arc resistance and conductive. High arc-resistant piece material can be formed. According to the cold spray method, various materials can be selected depending on the content of each metal and the type of additive.

  As described above, the cold spray method has a low carrier gas temperature and is a reaction in an inert gas atmosphere. Therefore, the surface of the central substrate 18a and the powder are not altered by heat or oxidation. In addition, a dense and stable coating with few internal defects is possible.

(Function and effect)
In this embodiment, since the melting | fusing point of the outer peripheral material 18b of the arc contactor 18 is high, it can be set as the arc contactor structure excellent in arc resistance.

  Thus, according to this embodiment, since the cold spray method has few restrictions on the shape of the center base material 18a, it is possible to provide the arc contactor 18 with improved design and productivity.

  Further, according to the present embodiment, an inexpensive iron or steel material is used for the central base material 18a, and a high melting point arc-resistant piece material represented by a tungsten-copper alloy as an example of an arc-resistant piece for the outer peripheral material 18b. By using this, it is possible to provide the arc contactor 18 that is inexpensive and excellent in arc resistance.

(Modification of the fourth embodiment)
In the fifth embodiment, an inexpensive iron or steel material is used for the central base material 18a, and an arc-resistant piece material having a high melting point such as a tungsten-copper alloy is used for the outer peripheral material 18b as an example of an arc-resistant piece. However, for example, by using lightweight aluminum or aluminum alloy with relatively high conductivity for the central base material 18a and using the arc-resistant piece for the outer peripheral material 18b, the current-carrying performance is high, and the lightweight is excellent in arc resistance. An arc contact can be provided.

  Further, by using copper or a copper alloy having high conductivity for the central base material 18a and using the arc-proof piece for the outer peripheral material 18b, the current carrying performance is further improved than that using aluminum for the central base material 18a. An arc contact 18 can be provided.

  Furthermore, although each embodiment of this invention was described as mentioned above, these embodiment is shown as an example only and is not intending limiting the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention.

  For example, in each of the above-described embodiments, the outer peripheral surface of the central base material is coated with the outer peripheral material with a uniform thickness by the cold spray method. However, the present invention is not limited to this. For example, the arc contact 18 in the fifth embodiment is used. You may make it form the front-end | tip part locally thicker than another part. Thereby, it is possible to provide the arc contact 18 that is further excellent in arc resistance.

  Further, in each of the above-described embodiments, the outer peripheral material is coated on the outer peripheral surface of the central base material by the cold spray method. However, the present invention is not limited to this. For example, in the fifth embodiment, the cap-shaped outer peripheral material is cold sprayed. It may be formed in advance by the method, and the outer peripheral material may be attached to the central base material.

  Each of these embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Sealed container, 2 ... Insulating gas, 3 ... Contact, 3a ... Center base material, 3b ... Outer material, 4 ... Conductor, 4a ... Central base material, 4b ... Outer material, 5 ... Finger, 7 ... Insulating spacer , 8 ... slide contact, 9 ... main contact (current-carrying member), 9a ... central base material, 9b ... outer periphery material, 10 ... puffer cylinder (energization member), 10a ... central base material, 10b ... outer peripheral material, 11 ... current supply Support, 12 ... Fixed support, 13 ... Finger, 15 ... Finger, 16 ... Base metal, 17 ... Arc-resistant piece, 18 ... Arc contact, 18a ... Center base material, 18b ... Outer peripheral material, 19 ... Arc contact

Claims (15)

A sealed container filled with an insulating gas;
In a gas insulated switchgear provided with a contactor provided in the sealed container and energized,
The contact has a central base material and an outer peripheral material that is provided on the outer peripheral surface of the central base material and has a higher conductivity than the central base material,
A gas insulated switchgear characterized in that the outer peripheral material is formed by a cold spray method.   The gas insulated switchgear according to claim 1, wherein a material of a central base material of the contactor is aluminum or an aluminum alloy, and a material of the outer peripheral material is copper or a copper alloy.   The gas insulated switchgear according to claim 1, wherein a material of a central base material of the contact is aluminum or an aluminum alloy, and a material of the outer peripheral material is silver or a silver alloy. A sealed container filled with an insulating gas;
In a gas insulated switchgear comprising a conductor provided in the sealed container,
The conductor has a central base material and an outer peripheral material provided on an outer peripheral surface of the central base material and having a smaller elastic modulus than the central base material,
A gas insulated switchgear characterized in that the outer peripheral material is formed by a cold spray method.   5. The gas insulated switchgear according to claim 4, wherein a material of a central base material of the conductor is iron or a steel material, and a material of the outer peripheral material is aluminum or an aluminum alloy.   The gas insulated switchgear according to claim 4, wherein a material of a central base material of the conductor is iron or a steel material, and a material of the outer peripheral material is copper or a copper alloy. A sealed container filled with an insulating gas;
In the gas-insulated switchgear comprising the energizing member provided in the sealed container and sliding,
The current-carrying member has a central base material and an outer peripheral material that is provided on the outer peripheral surface of the central base material and has a higher conductivity than the central base material,
A gas insulated switchgear characterized in that the outer peripheral material is formed by a cold spray method.   The gas insulated switchgear according to claim 7, wherein a material of a central base material of the energizing member is aluminum or an aluminum alloy, and a material of the outer peripheral material is copper or a copper alloy.   The gas insulated switchgear according to claim 7, wherein a material of a central base material of the energizing member is aluminum or an aluminum alloy, and a material of the outer peripheral material is silver or a silver alloy. A sealed container filled with an insulating gas;
A movable part and a fixed part disposed in the sealed container so as to be able to contact and separate from each other;
A main contact for energizing the movable part and the fixed part in contact with and away from each other;
In a gas insulated switchgear comprising an arc contact for inducing an arc when current is interrupted,
The main contact has a central base material and an outer peripheral material provided on the outer peripheral surface of the central base material and having higher conductivity than the central base material,
A gas insulated switchgear characterized in that the outer peripheral material is formed by a cold spray method.   The gas insulated switchgear according to claim 10, wherein a material of a central base material of the main contact is aluminum or an aluminum alloy, and a material of the outer peripheral material is copper or a copper alloy.   The gas insulated switchgear according to claim 10, wherein a material of a central base material of the main contact is aluminum or an aluminum alloy, and a material of the outer peripheral material is silver or a silver alloy. A sealed container filled with an insulating gas;
A movable part and a fixed part disposed in the sealed container so as to be able to contact and separate from each other;
A main contact for energizing the movable part and the fixed part in contact with and away from each other;
In a gas insulated switchgear comprising an arc contact for inducing an arc when current is interrupted,
The arc contact has a central base material and an outer peripheral material having a higher melting point than the central base material on the outer peripheral surface of the central base material,
A gas insulated switchgear characterized in that the outer peripheral material is formed by a cold spray method.   14. The gas insulated switchgear according to claim 13, wherein a material of a central base material of the arc contact is iron or a steel material, and a material of the outer peripheral material is an arc-resistant piece.   14. The gas insulated switchgear according to claim 13, wherein a material of a central base material of the arc contact is aluminum or an aluminum alloy, and a material of the outer peripheral material is an arc-proof piece.

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