Contact system with equipotential arc striking contact compensation disconnecting switch
By using the combination of equipotential arc-induced contacts and springs in the isolating switch, the problems of poor electrical conduction performance caused by poor arc extinguishing effect and dimensional deviation are solved, and a more stable electrical contact and protection effect is achieved.
Patent Information
- Application Number
- CN202411235377.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2024-12-27
AI Technical Summary
The existing isolating switches have poor arc extinguishing effect when the circuit is disconnected, which can easily damage the dynamic and static contacts, and have poor electrical conduction performance due to dimensional deviations.
The compensation isolation switch contact system with equipotential arc-induced contacts is adopted, including springs, arc-induced blocks, equipotential arc-induced contacts and rivets. Through the compression and arc angle of the spring, the dynamic contacts and static contacts are realized. Stabilize electrical contact and direct the arc to the arc extinguishing structure to protect the contacts.
It improves the arc extinguishing effect of the arc and the stability of the electrical contact between the contacts, protects the dynamic contacts and static contacts, and ensures the reliability and stable performance of the electrical contacts.
Smart Images
Figure CN119208064A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of isolating switches, in particular to a contact system of an isolating switch with equipotential arc-striking contact compensation. Background Art
[0002] The isolating switch is the most commonly used electrical appliance among high-voltage switchgear. As the name suggests, it plays an isolating role in the circuit. Its working principle and structure are relatively simple, but due to its large usage and high requirements for working reliability, it has a great impact on the design, construction and safe operation of substations and power plants.
[0003] In the prior art, an arc is generated when the circuit is disconnected, but the arc extinguishing effect is poor, and the arc is easy to damage the movable contact and the stationary contact of the disconnector, and the electrical contact between the contacts will also have poor electrical conductivity due to size deviation. Therefore, we provide a disconnector contact system with equipotential arc-starting contact compensation. Summary of the invention
[0004] The present invention aims to solve the technical problem of how to improve the arc extinguishing effect and the stability of the electrical contact between contacts, and protect the moving contacts and static contacts of the disconnector, and provides a disconnector contact system with equipotential arc-striking contact compensation.
[0005] The technical solution adopted by the present invention to solve its technical problem is: A contact system for a compensating isolating switch with an equipotential arc-starting contact comprises: a spring, an arc-starting block, an equipotential arc-starting contact, a first rivet, and an equipotential connecting plate. The equipotential connecting plate is electrically connected to the static contact of the isolating switch. The arc-starting block is connected to the equipotential connecting plate, and a receiving groove is provided on the surface of the arc-starting block away from the equipotential connecting plate. The spring is provided in the receiving groove. The equipotential arc-starting contact is provided on the side of the arc-starting block away from the equipotential connecting plate, and the side of the equipotential arc-starting contact is slidably provided in the receiving groove and abuts against the spring, and its sliding direction is perpendicular to the equipotential connecting plate, and the equipotential arc-starting contact is electrically in contact with the moving contact of the isolating switch. The first rivet is parallel to the equipotential connecting plate, and the first rivet rivets the arc-starting block and the equipotential arc-starting contact.
[0006] During installation, the equipotential connection plate is electrically connected to the static contact of the disconnector, and the equipotential connection plate and the equipotential arcing contact are placed close to the arc extinguishing structure. When closing the switch, the movable contact of the disconnector first makes electrical contact with the equipotential arcing contact, and then with the static contact of the disconnector. At this time, the movable contact of the disconnector squeezes the equipotential arcing contact to move and compresses the spring, which has a compensation effect of up to 1mm. When the circuit needs to be disconnected, the movable contact of the disconnector moves, first separated from the static contact, and then separated from the equipotential arcing contact. When the moving contact and the stationary contact of the isolating switch are separated, an arc will be generated between the moving contact and the stationary contact of the isolating switch, and at this time, the spring squeezes the equipotential arc-starting contact to move, so that the equipotential arc-starting contact continues to be in electrical contact with the moving contact of the isolating switch, and current will still flow between the equipotential arc-starting contact and the moving contact of the isolating switch. At this time, the arc between the moving contact and the stationary contact of the isolating switch will move toward the equipotential arc-starting contact and the arc extinguishing structure, thereby protecting the moving contact and the stationary contact of the isolating switch, and quickly directing the arc between the moving contact and the stationary contact of the isolating switch to the arc extinguishing structure. Then the moving contact of the isolating switch continues to move, so that the equipotential arc-starting contact is separated from the moving contact of the isolating switch, and at this time, an arc will be generated between the equipotential arc-starting contact and the moving contact of the isolating switch, and then the arc between the equipotential arc-starting contact and the moving contact of the isolating switch and the arc between the moving contact and the stationary contact of the isolating switch will enter the arc extinguishing structure to achieve arc extinguishing. The pressure of the spring is smaller than the pressure of the moving contact of the isolating switch on the equipotential arcing contact, so that the equipotential arcing contact maintains elastic electrical contact with the moving contact of the isolating switch, compensates for the dimensional deviation, and makes the electrical contact between the equipotential arcing contact and the moving contact of the isolating switch more stable.
[0007] Furthermore, the arc-striking block includes two first arc-striking plates, a plurality of second arc-striking plates, and a plurality of second rivets. The two first arc-striking plates are perpendicular to the first rivet, and are respectively located on both sides of the equipotential arc-striking contacts, and are closely attached to the equipotential arc-striking contacts, and the two first arc-striking plates are clamped with the equipotential connecting plate. The plurality of second arc-striking plates are parallel to the two first arc-striking plates, and are located between the two first arc-striking plates, and are located on the side of the equipotential arc-striking contacts close to the equipotential connecting plate, and the plurality of second arc-striking plates are closely attached to each other, and are closely attached to the equipotential connecting plate and the two first arc-striking plates, and there is a gap between the sides of the plurality of second arc-striking plates away from the equipotential connecting plate and the equipotential arc-striking contacts. The accommodating grooves are arranged on the sides of the plurality of second arc-striking plates close to the equipotential arc-striking contacts, and extend to the two first arc-striking plates, respectively. The first rivet rivets the two first arc-striking plates and the equipotential arc-striking contacts. The plurality of second rivets are parallel to the first rivet, and the plurality of second rivets rivet the two first arc-striking plates and the plurality of second arc-striking plates.
[0008] Since the arc between the equipotential arc-starting contact and the moving contact of the isolating switch and the arc between the moving contact and the static contact of the isolating switch will act on the equipotential arc-starting contact, the two first arc-starting plates, and the plurality of second arc-starting plates, the high temperature generated will easily cause damage to the equipotential arc-starting contact, the two first arc-starting plates, and the plurality of second arc-starting plates. Therefore, the equipotential arc-starting contact, the two first arc-starting plates, and the plurality of second arc-starting plates need to be conveniently replaced when they are damaged. When the equipotential arc-starting contact needs to be replaced, the staff removes the first rivet and replaces the equipotential arc-starting contact. When the plurality of second arc-starting plates needs to be replaced, the staff removes the first rivet, the plurality of second rivets, and then replaces the plurality of second arc-starting plates. When the two first arc-starting plates need to be replaced, the staff removes the first rivet, the plurality of second rivets, and then removes the two first arc-starting plates for replacement.
[0009] Furthermore, the equipotential connecting plate, the two first arc-striking plates, the plurality of second arc-striking plates, and the equipotential arc-striking contacts are subjected to arc angle treatment.
[0010] Arc angle processing helps to guide the flow direction of the arc and reduce the direct impact and ablation of the arc on the equipotential connection plate, two first arc-starting plates, several second arc-starting plates, and the surface of the equipotential arc-starting contact.
[0011] Furthermore, the first rivet and the plurality of second rivets are made of aluminum material.
[0012] The first rivet and the plurality of second rivets are made of aluminum material, which can save costs while meeting the required strength and stability requirements.
[0013] Furthermore, the equipotential connection plate, the two first arc-starting plates, and the plurality of second arc-starting plates are made of ferromagnetic materials, and the equipotential arc-starting contacts are made of copper-tungsten alloy.
[0014] Copper-tungsten alloy has good electrical and thermal conductivity, high temperature resistance, and arc erosion resistance. The equipotential connection plate, two first arc-starting plates, and a plurality of second arc-starting plates are made of ferromagnetic materials and can have good electrical conductivity.
[0015] Furthermore, the equipotential arcing contact is in the shape of an elongated strip, parallel to the equipotential connection plate and the first arcing plate, and one end of the equipotential arcing contact away from the static contact of the isolating switch is bent toward the side away from the equipotential connection plate.
[0016] One end of the equipotential arc-striking contact is bent toward a side away from the equipotential connecting plate, so as to guide the arc toward the arc-extinguishing structure, thereby improving the arc-extinguishing effect on the arc.
[0017] Furthermore, the spring is a V-shaped spring leaf.
[0018] The V-shaped spring piece has good dimensional deviation compensation capability, thus ensuring the normal operation and stable performance of the disconnector.
[0019] Furthermore, the spring is a coil spring.
[0020] The spiral spring can make the electrical contact between the equipotential arcing contact and the moving contact of the disconnector more stable.
[0021] Furthermore, the spring is made of QBe2 beryllium bronze material.
[0022] QBe2 beryllium bronze material has good electrical conductivity, thermal conductivity and elasticity.
[0023] Furthermore, a waisted circular hole is provided at the contact position between the equipotential arc-striking contact and the first rivet, and the long axis direction of the waisted circular hole is parallel to the sliding direction of the equipotential arc-striking contact.
[0024] Furthermore, the compensation amount of the waist round hole is 1mm.
[0025] The waisted round hole combined with the spring can compensate for the size deviation and make the electrical contact between the equipotential arc-striking contact and the moving contact of the disconnector more stable.
[0026] Beneficial effects of the present invention: 1. When the circuit needs to be disconnected, the moving contact of the isolating switch moves to separate the moving contact and the static contact of the isolating switch. At this time, an arc will be generated between the moving contact and the static contact of the isolating switch, and the spring squeezes the equipotential arc-starting contact to move, so that the equipotential arc-starting contact continues to be in electrical contact with the moving contact of the isolating switch. Current will still flow between the equipotential arc-starting contact and the moving contact of the isolating switch. At this time, the arc between the moving contact and the static contact of the isolating switch will move toward the equipotential arc-starting contact and the arc extinguishing structure, thereby protecting the moving contact and the static contact of the isolating switch, and quickly leading the arc between the moving contact and the static contact of the isolating switch to the arc extinguishing structure. Then the moving contact of the isolating switch continues to move, separating the equipotential arc-striking contact from the moving contact of the isolating switch. At this time, an arc will be generated between the equipotential arc-striking contact and the moving contact of the isolating switch. Then the arc between the equipotential arc-striking contact and the moving contact of the isolating switch and the arc between the moving contact and the static contact of the isolating switch will enter the arc extinguishing structure to extinguish the arc.
[0027] 2. The pressure of the spring is smaller than the pressure of the moving contact of the isolating switch on the equipotential arcing contact. The waisted round hole is combined with the spring, so that the equipotential arcing contact continues to be in elastic electrical contact with the moving contact of the isolating switch, compensating for the dimensional deviation and making the electrical contact between the equipotential arcing contact and the moving contact of the isolating switch more stable.
[0028] 3. When the equipotential arc-starting contact needs to be replaced, the staff removes the first rivet and replaces the equipotential arc-starting contact. When the two second arc-starting plates need to be replaced, the staff removes the first rivet, the two second rivets, and then replaces the two second arc-starting plates. When the two first arc-starting plates need to be replaced, the staff removes the first rivet, the two second rivets, and then removes the two first arc-starting plates for replacement. It is very convenient to replace. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 It is a schematic diagram of the overall structure of the contact system of the isolating switch with equipotential arc-striking contact compensation; Figure 2 This is a schematic diagram of the internal structure of the contact system of the isolating switch with equipotential arc-striking contact compensation; Figure 3 This is the installation diagram of the contact system of the isolating switch with equipotential arc-striking contact compensation.
[0030] Explanation of the accompanying drawings: 1. Equipotential connecting plate; 2. First arc-striking plate; 3. Second arc-striking plate; 4. Second rivet; 5. First rivet; 6. Equipotential arc-striking contact; 7. Spring; 8. Moving contact; 9. Static contact. DETAILED DESCRIPTION
[0031] The concept and technical effects of the present invention will be clearly and completely described below in conjunction with embodiments to fully understand the purpose, features and effects of the present invention. Example 1
[0032] like Figure 1 , Figure 2 , Figure 3 As shown, the contact system of the isolating switch with equipotential arc-starting contact compensation includes: a spring 7, an arc-starting block, an equipotential arc-starting contact 6, a first rivet 5, and an equipotential connecting plate 1. The equipotential connecting plate 1 is electrically connected to the static contact 9 of the isolating switch. The arc-starting block is connected to the equipotential connecting plate 1, and a receiving groove is provided on the surface of the arc-starting block away from the equipotential connecting plate 1. The spring 7 is provided in the receiving groove. The equipotential arc-starting contact 6 is provided on the side of the arc-starting block away from the equipotential connecting plate 1, and the side of the equipotential arc-starting contact 6 is slidably provided in the receiving groove and abuts against the spring 7, and its sliding direction is perpendicular to the equipotential connecting plate 1, and the equipotential arc-starting contact 6 is electrically in contact with the moving contact 8 of the isolating switch. The first rivet 5 is parallel to the equipotential connecting plate 1, and the first rivet 5 is riveted to the arc-starting block and the equipotential arc-starting contact 6, and the contact portion between the equipotential arc-starting contact 6 and the first rivet 5 is provided with a waist-round hole, and the long axis direction of the waist-round hole is parallel to the sliding direction of the equipotential arc-starting contact 6.
[0033] During installation, the equipotential connection plate 1 is electrically connected to the static contact 9 of the disconnector, and the equipotential connection plate 1 and the equipotential arcing contact 6 are arranged close to the arc extinguishing structure. When closing the switch, the movable contact 8 of the disconnector first makes electrical contact with the equipotential arcing contact 6, and then makes electrical contact with the static contact 9 of the disconnector. At this time, the movable contact 8 of the disconnector squeezes the equipotential arcing contact 6 to move, and compresses the spring 7, which has a compensation effect of up to 1mm. When the circuit needs to be disconnected, the movable contact 8 of the disconnector moves, first separates from the static contact 9, and then separates from the equipotential arcing contact 6. When the moving contact 8 and the stationary contact 9 of the isolating switch are separated, an arc will be generated between the moving contact 8 and the stationary contact 9 of the isolating switch, and at this time, the spring 7 squeezes the equipotential arc-starting contact 6 to move, so that the equipotential arc-starting contact 6 continues to be in electrical contact with the moving contact 8 of the isolating switch, and current will still flow between the equipotential arc-starting contact 6 and the moving contact 8 of the isolating switch. At this time, the arc between the moving contact 8 and the stationary contact 9 of the isolating switch will move toward the equipotential arc-starting contact 6 and the arc extinguishing structure, thereby protecting the moving contact 8 and the stationary contact 9 of the isolating switch, and quickly leading the arc between the moving contact 8 and the stationary contact 9 of the isolating switch to the arc extinguishing structure. Then the movable contact 8 of the disconnector continues to move, so that the equipotential arc-starting contact 6 is separated from the movable contact 8 of the disconnector. At this time, an arc will be generated between the equipotential arc-starting contact 6 and the movable contact 8 of the disconnector, and then the arc between the equipotential arc-starting contact 6 and the movable contact 8 of the disconnector and the arc between the movable contact 8 and the static contact 9 of the disconnector will enter the arc extinguishing structure to achieve arc extinguishing. The pressure of the spring 7 is less than the pressure of the movable contact 8 of the disconnector on the equipotential arc-starting contact 6, so that the equipotential arc-starting contact 6 continues to be in elastic electrical contact with the movable contact 8 of the disconnector, and the size deviation is compensated, so that the electrical contact between the equipotential arc-starting contact 6 and the movable contact 8 of the disconnector is more stable.
[0034] The arc-striking block includes two first arc-striking plates 2, two second arc-striking plates 3, and two second rivets 4. The two first arc-striking plates 2 are perpendicular to the first rivet 5, and are respectively located on both sides of the equipotential arc-striking contact 6, and are closely attached to the equipotential arc-striking contact 6. The two first arc-striking plates 2 are clamped with the equipotential connecting plate 1. The two second arc-striking plates 3 are parallel to the two first arc-striking plates 2, and are located between the two first arc-striking plates 2, and are located on the side of the equipotential arc-striking contact 6 close to the equipotential connecting plate 1. The two second arc-striking plates 3 are closely attached to each other, and are closely attached to the equipotential connecting plate 1 and the two first arc-striking plates 2. There is a gap between the sides of the two second arc-striking plates 3 away from the equipotential connecting plate 1 and the equipotential arc-striking contact 6. The accommodating groove is arranged on the sides of the two second arc-striking plates 3 close to the equipotential arc-striking contact 6, and extends to the two first arc-striking plates 2 respectively. The first rivet 5 rivets the two first arc-striking plates 2 and the equipotential arc-striking contact 6. The two second rivets 4 are parallel to the first rivets 5 , and the two second rivets 4 rivet the two first arc-striking plates 2 and the two second arc-striking plates 3 .
[0035] Since the arc between the equipotential arc-striking contact 6 and the moving contact 8 of the isolating switch and the arc between the moving contact 8 and the static contact 9 of the isolating switch will act on the equipotential arc-striking contact 6, the two first arc-striking plates 2, and the two second arc-striking plates 3, the high temperature generated is likely to cause damage to the equipotential arc-striking contact 6, the two first arc-striking plates 2, and the two second arc-striking plates 3. Therefore, when the equipotential arc-striking contact 6, the two first arc-striking plates 2, and the two second arc-striking plates 3 are damaged, they need to be conveniently replaced. When the equipotential arc-striking contact 6 needs to be replaced, the staff removes the first rivet 5 and replaces the equipotential arc-striking contact 6. When the two second arc-striking plates 3 need to be replaced, the staff removes the first rivet 5 and the two second rivets 4, and then replaces the two second arc-striking plates 3. When the two first arc-striking plates 2 need to be replaced, the staff removes the first rivet 5 and the two second rivets 4, and then removes the two first arc-striking plates 2 for replacement.
[0036] The equipotential connecting plate 1, the two first arc-striking plates 2, the two second arc-striking plates 3, and the equipotential arc-striking contact 6 are subjected to arc angle treatment.
[0037] The arc angle treatment helps to guide the flow direction of the arc and reduce the direct impact and ablation of the arc on the surfaces of the equipotential connection plate 1, the two first arc-starting plates 2, the two second arc-starting plates 3, and the equipotential arc-starting contact 6.
[0038] The first rivet 5 and the two second rivets 4 are made of aluminum.
[0039] The first rivet 5 and the two second rivets 4 are made of aluminum material, which can save costs while meeting the required strength and stability requirements.
[0040] The equipotential connection plate 1, the two first arc-starting plates 2, and the two second arc-starting plates 3 are made of ferromagnetic materials. The equipotential arc-starting contact 6 is made of copper-tungsten alloy.
[0041] Copper-tungsten alloy has good electrical and thermal conductivity, high temperature resistance, and arc erosion resistance. The equipotential connection plate 1, the two first arc-starting plates 2, and the two second arc-starting plates 3 are made of ferromagnetic materials and can have good electrical conductivity.
[0042] The equipotential arc-striking contact 6 is in the shape of an elongated strip, parallel to the equipotential connecting plate 1 and the first arc-striking plate 2 , and one end of the equipotential arc-striking contact 6 away from the static contact 9 of the disconnector is bent toward the side away from the equipotential connecting plate 1 .
[0043] One end of the equipotential arc-striking contact 6 is bent toward a side away from the equipotential connection plate 1 , so as to guide the arc toward the arc-extinguishing structure, thereby improving the arc-extinguishing effect.
[0044] The spring 7 is a V-shaped spring 7 pieces.
[0045] The 7-piece V-shaped spring has good dimensional deviation compensation capability, thus ensuring the normal operation and stable performance of the disconnector.
[0046] The spring 7 is made of QBe2 beryllium bronze.
[0047] QBe2 beryllium bronze material has good electrical conductivity, thermal conductivity and elasticity.
[0048] The compensation amount of the waist round hole is 1mm.
[0049] The waisted round hole combined with the spring 7 can compensate for the size deviation, so that the electrical contact between the equipotential arc-striking contact 6 and the moving contact 8 of the disconnector is more stable. Example 2
[0050] The spring 7 is a coil spring 7. The coil spring 7 can make the electrical contact between the equipotential arc-striking contact 6 and the moving contact of the disconnector more stable.
[0051] The above embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work shall all fall within the scope of protection of the present invention.
Claims
1. A contact system for a disconnector with equipotential arc-striking contact compensation, characterized in that: include: A spring (7), an arc-striking block, an equipotential arc-striking contact (6), a first rivet (5), and an equipotential connecting plate (1); the equipotential connecting plate (1) is electrically connected to a stationary contact (9) of an isolating switch; the arc-striking block is connected to the equipotential connecting plate (1), and a receiving groove is provided on a surface of the arc-striking block away from the equipotential connecting plate (1); the spring (7) is arranged in the receiving groove; the equipotential arc-striking contact (6) is arranged on a side of the arc-striking block away from the equipotential connecting plate (1), and a side portion of the equipotential arc-striking contact (6) is slidably arranged in the receiving groove and abuts against the spring (7), and the equipotential arc-striking contact (6) is electrically in contact with a moving contact (8) of the isolating switch; the first rivet (5) rivets the arc-striking block and the equipotential arc-striking contact (6).
2. The contact system of the isolating switch with equipotential arc-striking contact compensation according to claim 1, characterized in that: The sliding direction of the equipotential arc-striking contact is perpendicular to the equipotential connection plate (1), and the first rivet (5) is parallel to the equipotential connection plate (1).
3. The contact system of the isolating switch with equipotential arc-striking contact compensation according to claim 2, characterized in that: The arc-striking block comprises two first arc-striking plates (2), a plurality of second arc-striking plates (3), and a plurality of second rivets (4); the two first arc-striking plates (2) are perpendicular to the first rivet (5), are respectively located on both sides of the equipotential arc-striking contact (6), and are closely attached to the equipotential arc-striking contact (6); the two first arc-striking plates (2) are clamped to the equipotential connecting plate (1); the plurality of second arc-striking plates (3) are parallel to the two first arc-striking plates (2), are located between the two first arc-striking plates (2), and are located on the side of the equipotential arc-striking contact (6) close to the equipotential connecting plate (1); the plurality of second arc-striking plates (3) are closely attached to each other, and are closely attached to the equipotential connecting plate (1); The equipotential connecting plate (1) and the two first arc-starting plates (2) are in close contact, and there is a gap between the side of the plurality of second arc-starting plates (3) away from the equipotential connecting plate (1) and the equipotential arc-starting contact (6); the accommodating groove is arranged on the side of the plurality of second arc-starting plates (3) close to the equipotential arc-starting contact (6), and extends to the two first arc-starting plates (2) respectively; the first rivet (5) rivets the two first arc-starting plates (2) and the equipotential arc-starting contact (6); the plurality of second rivets (4) are parallel to the first rivet (5), and the plurality of second rivets (4) rivet the two first arc-starting plates (2) and the plurality of second arc-starting plates (3).
4. The contact system of the isolating switch with equipotential arc-striking contact compensation according to claim 3, characterized in that: The equipotential connection plate (1), the two first arc-starting plates (2), a plurality of the second arc-starting plates (3), and the equipotential arc-starting contact (6) are subjected to arc angle treatment.
5. The contact system of the isolating switch with equipotential arc-striking contact compensation according to claim 3, characterized in that: The first rivet (5) and a plurality of the second rivets (4) are made of aluminum material; the equipotential connection plate (1), the two first arc-starting plates (2), and a plurality of the second arc-starting plates (3) are made of ferromagnetic material; and the equipotential arc-starting contact (6) is made of copper-tungsten alloy.
6. The contact system of the isolating switch with equipotential arc-striking contact compensation according to claim 3, characterized in that: The equipotential arc-striking contact (6) is in the shape of an elongated strip and is parallel to the equipotential connecting plate (1) and the first arc-striking plate (2). One end of the equipotential arc-striking contact (6) away from the static contact (9) of the isolating switch is bent toward a side away from the equipotential connecting plate (1).
7. The contact system of the isolating switch with equipotential arc-striking contact compensation according to claim 1, characterized in that: The spring (7) is a V-shaped spring (7) sheet or a helical spring (7).
8. The contact system of the isolating switch with equipotential arc-striking contact compensation according to claim 1, characterized in that: The spring (7) is made of QBe2 beryllium bronze material.
9. The contact system of the isolating switch with equipotential arc-striking contact compensation according to claim 1, characterized in that: A waist-shaped hole is provided at the contact position between the equipotential arc-striking contact (6) and the first rivet (5).
10. The contact system of the isolating switch with equipotential arc-striking contact compensation according to claim 9, characterized in that: The long axis direction of the waisted circular hole is parallel to the sliding direction of the equipotential arc-striking contact (6), and the compensation amount of the waisted circular hole is 1 mm.