Vertically-installed series-connected resistor unit and circuit breaker closing resistor structure

Abstract

The invention provides a vertically-installed series-connected resistor unit and a circuit breaker closing resistor structure, and belongs to the field of circuit breakers, the vertically-installed series-connected circuit breaker closing resistor structure comprises at least two tank bodies, and each tank body is internally provided with a vertically-installed series-connected resistor unit. All the resistor units which are vertically installed and connected in series are sequentially connected in series through an elastic electric connection module, the lower end of a cross-core insulating rod in each resistor unit which is vertically installed and connected in series is fixedly connected with a lower side conductor, and the upper end of the cross-core insulating rod sequentially penetrates through a conductive cushion block, a resistor disc, a conductive fixing plate and a first conductive spring from bottom to top and then is fixed to an upper side conductor. And all the resistor discs are spirally arranged and are sequentially connected in series through conductive pieces. The closing resistor structure has the beneficial effects that the hidden danger of deflection deformation of the cross-core insulating rod caused by the gravity of the resistor disc is eliminated, so that the reliability of the whole closing resistor structure is improved.

Description

Technical Field

[0001] The invention belongs to the field of circuit breakers, and particularly relates to a vertically installed and series-connected resistor unit and a circuit breaker closing resistor structure. Background Art

[0002] In the power system, the closing resistor unit plays a crucial role, and its important functions are mainly reflected in the following two aspects: 1. Limiting overvoltage; during the operation of high-voltage transmission lines, especially when closing an open long line, if the power supply voltage amplitude and the residual voltage of the line are closed in the reverse direction, the system parameters will change suddenly, which will trigger the L-C electromagnetic energy oscillation in the power grid, and it is very likely to cause a large overvoltage; to solve this problem, a resistor is usually connected between the breaker contacts through auxiliary contacts, and the closing overvoltage and magnetizing inrush current are limited through this resistor, that is, it can absorb part of the electrical energy in the power grid by pre-investing the closing resistor and convert it into heat energy, thereby effectively weakening the electromagnetic oscillation and realizing the suppression of overvoltage.

[0003] 2. Reducing the impact of magnetizing inrush current on the switch; during the closing process of the circuit breaker, due to the sudden release of the magnetic field energy of the inductor element, an instantaneous large current, that is, the magnetizing inrush current, will be generated, and the switchgear will be impacted by this large current during this process, and even directly damaged in severe cases; while the closing resistor can consume the energy generated by the release of this magnetic field energy, thereby reducing the impact of the magnetizing inrush current on the switchgear and protecting the switchgear from damage.

[0004] However, since the existing closing resistor units often adopt a horizontal installation structure, they are easily affected by the self-gravity of the resistor chips, resulting in the deflection deformation of the through-insulating rod for installing the resistor chips, which brings a series of adverse consequences: 1. The deflection deformation of the through-insulating rod may cause the distance between the resistor chips to change, thereby affecting the electrical performance of the resistor, causing the resistance value to deviate, and thus reducing the efficiency of the closing resistor unit in the power system; 2. The uneven deflection deformation may also cause local stress concentration of the resistor chips, accelerating the aging and damage of the resistor chips, shortening the service life of the resistor chips, increasing the maintenance cost and replacement frequency of the equipment; 3. The through-insulating rod is in a deformed state for a long time, and its own insulation performance may also be affected, with a potential risk of insulation breakdown, seriously threatening the safe and stable operation of the power system. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide a vertically installed and series-connected resistor unit and a circuit breaker closing resistor structure, and enable it to eliminate the potential risk of deflection deformation of the through-insulating rod caused by the self-gravity of the resistor chips, thereby improving the reliability of the entire closing resistor structure.

[0006] To solve the above technical problems, on the one hand, the present invention provides a vertically-mounted and serially-connected resistor unit, which includes an upper conductor and a lower conductor arranged opposite to each other. There are at least two through-insulating rods arranged in a circumferential array between the upper conductor and the lower conductor; the lower end of the through-insulating rod is fixedly connected to the lower conductor, and the upper end of the through-insulating rod sequentially penetrates through a conductive spacer, a resistor chip, a conductive fixing plate, and a conductive spring one from bottom to top and is fixedly connected to the upper conductor; the lower end of the conductive spacer is in contact with the lower conductor, the lower end of the conductive spring one is in contact with the conductive fixing plate, and the upper end of the conductive spring one is in contact with the upper conductor; the number of resistor chips on each through-insulating rod is at least two, and all the resistor chips are arranged in a spiral shape and are sequentially connected in series through conductive members; the lowermost resistor chip is in contact with the conductive spacer at the corresponding through-insulating rod, the uppermost resistor chip is in contact with the conductive fixing plate at the corresponding through-insulating rod, and insulating pads are provided on both the upper and lower sides of any resistor chip located between the lowermost resistor chip and the uppermost resistor chip. At this time, since the above structure provided by the present invention vertically spirally connects each resistor chip together, it can not only effectively eliminate the potential deflection deformation hazard of the through-insulating rod caused by the self-weight of the resistor chip, but also effectively shorten the length of the entire resistor unit, making it convenient for installation and debugging.

[0007] Further, the lower mounting holes on the lower conductor for mounting the through-insulating rods and the upper mounting holes on the upper conductor for mounting the through-insulating rods are both stepped holes. Locking rings are installed at the lower end and the upper end of the through-insulating rod. The upper end of the locking ring at the lower end of the through-insulating rod abuts against the step surface of the lower mounting hole, and the lower end of the locking ring at the upper end of the through-insulating rod abuts against the step surface of the upper mounting hole, thereby realizing the fixation of the through-insulating rod between the upper conductor and the lower conductor.

[0008] Further, a lower connecting conductor is installed on one side of the lower conductor, and an upper connecting conductor is provided on one side of the upper conductor. The lower connecting conductor is electrically connected to the corresponding incoming and outgoing line conductors, and the upper connecting conductor is connected in series with the corresponding incoming and outgoing line conductors or other vertically-mounted and serially-connected resistor units.

[0009] Further, a slot is provided on the side surface of the lower conductor. A ring of clamping grooves is provided on the groove wall of the slot, and a ring-shaped conductive spring two is installed in the clamping grooves; when the lower connecting conductor is inserted into the slot, the conductive spring two abuts against the side wall of the lower connecting conductor, thereby ensuring that the lower connecting conductor can be firmly connected to the lower conductor.

[0010] Further, a conductive transition plate is installed on the bottom surface of the lower conductor. A shield is installed on the outer edge of the bottom surface of the conductive transition plate, and an insulating platform is installed in the middle of the bottom surface of the conductive transition plate, and it is installed in the tank body of the circuit breaker through the insulating platform.

[0011] On the other hand, the present invention also provides a closing resistor structure for a vertically installed series circuit breaker, which includes at least two cans. Each can is installed with one of the above-mentioned vertically installed resistor units. All the vertically installed resistor units are sequentially connected in series through an elastic electrical connection module to form a closing resistor structure of the circuit breaker that meets the relevant resistance value requirements.

[0012] Furthermore, the elastic electrical connection module includes a first bellows. Both ends of the first bellows are installed with first pot-type insulators. Assembly contact seats II are installed on the first pot-type insulators. A flexible connection conductor is connected between the assembly contact seats II at both ends. An assembly contact seat I is installed at the end of the upper connection conductor. The assembly seat I is electrically connected to the corresponding assembly contact seat II, thereby realizing the series connection between adjacent two cans.

[0013] Furthermore, the lower connection conductor is a flexible connection conductor. A second bellows is installed on the side of the can. A second pot-type insulator is installed at the end of the second bellows away from the can. An incoming and outgoing line connection conductor is installed on the second pot-type insulator. The incoming and outgoing line connection conductor is electrically connected to the lower connection conductor, and the distance between the incoming and outgoing line connection conductor and the can can be adjusted by pulling the second bellows.

[0014] Furthermore, a lower cover plate is provided at the bottom of the can. A support conductor is installed at the upper end of the lower cover plate. The upper end of the support conductor is installed together with the insulating platform of the corresponding vertically installed resistor unit through a fastener, thereby realizing the installation of the vertically installed resistor unit in the can.

[0015] Furthermore, an adjustment base is provided at the lower end of the lower cover plate, and the height of the can is adjusted through the adjustment base.

[0016] It can be seen from the above technical solutions that the present invention has the following advantages: The vertically installed series resistor unit and the closing resistor structure provided by the present invention connect each resistor sheet in a vertical spiral series. It can not only effectively eliminate the deflection deformation hidden danger brought by the self-gravity of the resistor sheet to the through-insulating rod, but also effectively shorten the length of the entire resistor unit, making it convenient for installation and debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the actual application of Embodiment 1 in the present invention; Figure 2 It is a schematic diagram of the structure of the resistor string in the present invention; Figure 3 Schematic diagram of the series connection of two adjacent resistor sheets in the present invention; Figure 4 Schematic diagram of the structure of the upper conductor in the present invention; Figure 5 Schematic diagram of the installation of the second conductive spring in the present invention; Figure 6 Schematic diagram of the structure of the second conductive spring in the present invention; Figure 7 Schematic diagram of the structure of the second embodiment in the present invention Figure 1 ; Figure 8 Schematic diagram of the structure of the second embodiment in the present invention Figure 2 .

[0019] In the figure: 1, the first pot insulator; 2, the first bellows; 3, the tank body; 4, the second pot insulator; 5, the second bellows; 6, the incoming and outgoing line conductor; 7, the first assembly contact seat; 8, the conductive transition plate; 9, the shield; 10, the insulating platform; 11, the support conductor; 12, the adjusting base; 13, the lower connecting conductor; 14, the lower conductor; 15, the second conductive spring; 16, the resistor string; 17, the upper conductor; 18, the locking ring; 19, the conductive spacer; 20, the through-insulating rod; 21, the resistor sheet; 22, the conductive fixing plate; 23, the first conductive spring; 24, the conductive part; 25, the insulating pad; 26, the guiding ring. Specific embodiments

[0020] In order to make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the specific embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this patent.

[0021] Embodiment 1 As Figures 1 to 6 shown, Embodiment 1 of the present invention provides a vertically installed series-connected resistor unit, which includes an insulating platform 10 used for installation in the tank body 3 of the circuit breaker. The insulating platform 10 preferably has a frustum structure with a smaller upper part and a larger lower part, and a conductive transition plate 8 is installed at the upper end of the insulating platform 10 through fasteners such as bolts. The conductive transition plate 8 is preferably an aluminum plate, and a shield 9 is installed on the outer edge of the bottom surface of the conductive transition plate 8, and the shield 9 is sleeved outside the upper end of the insulating platform 10.

[0022] The upper end of the conductive transition plate 8 is installed with a lower conductor 14 through fasteners such as bolts. A slot is provided on the side of the lower conductor 14, and a lower connecting conductor 13 for electrically connecting the incoming and outgoing line conductors 6 is inserted into the slot. Moreover, as a preference, in the first embodiment, a circle of clamping grooves is circumferentially formed on the inner wall of the slot, and an annular conductive spring two 15 is installed inside the clamping grooves. In this way, when the lower connecting conductor 13 is inserted into the slot, the side wall of the lower connecting conductor 13 will abut against the conductive spring two 15, so as to ensure that the lower connecting conductor 13 can be firmly connected to the lower conductor 14. At the same time, in the present invention, a circle of guiding grooves can also be circumferentially formed on the inner wall of the slot, and an inner ring provided with a guiding ring is installed inside the guiding grooves. Moreover, an arc chamfer is provided on the inner ring of the guiding ring. In this way, when the lower connecting conductor 13 is inserted into the slot, the guiding ring can guide the lower connecting conductor 13 to ensure that the lower connecting conductor 13 is centered.

[0023] An upper conductor 17 is provided above the lower conductor 14, and an upper connecting conductor for electrically connecting the incoming and outgoing line conductors 6 or other resistance units is provided on the side of the upper conductor 17. An assembly contact seat one 7 is installed at the end of the upper connecting conductor. At the same time, at least two vertical through-insulating rods 20 are circumferentially arranged between the upper conductor 17 and the lower conductor 14, and a string of resistance sheets 21 is provided on each through-insulating rod 20. Specifically, as Figure 1 shown, in the first embodiment, corresponding numbers of lower mounting holes for installing the through-insulating rods 20 are formed on the lower conductor 14, and corresponding numbers of upper mounting holes for installing the through-insulating rods 20 are formed on the upper conductor 17. Moreover, the lower mounting holes are stepped holes that are smaller at the top and larger at the bottom, and the upper mounting holes are stepped holes that are larger at the top and smaller at the bottom. After the lower end of the through-insulating rod 20 extends into the lower mounting hole, a first locking ring 18 is sleeved, and the upper end of the locking ring 18 abuts against the stepped surface of the lower mounting hole, so as to fix the through-insulating rod 20 at the lower conductor 14. The upper end of the through-insulating rod 20 passes through the lower conductor 14 and then sequentially penetrates through a conductive spacer 19, a resistance sheet 21, a conductive fixing plate 22, and a conductive spring one 23 from bottom to top and extends into the upper mounting hole at the upper conductor 17. Subsequently, a second locking ring 18 is installed in the upper mounting hole, and the lower end of the locking ring 18 abuts against the stepped surface of the upper mounting hole, so as to fix the through-insulating rod 20 at the upper conductor 17.

[0024] As Figure 2As shown, the resistor string 16 on each through-insulating rod 20 includes at least two resistor chips 21, and the number of resistor chips 21 on each through-insulating rod 20 is the same. All the resistor chips 21 on all the through-insulating rods 20 are arranged in a spiral shape as a whole and are connected in series in sequence through conductive members 24 such as copper sheets. The lowermost resistor chip 21 is in contact with the conductive spacer 19 at the corresponding through-insulating rod 20, and the uppermost resistor chip 21 is in contact with the conductive fixing plate 22 at the corresponding through-insulating rod 20. Two insulating pads 25 are provided on the upper and lower sides of any resistor chip 21 located between the lowermost resistor chip 21 and the uppermost resistor chip 21. At the same time, the lower end of each conductive spacer 19 is in contact with the lower conductor 14, and the material of the conductive spacer 19 is preferably aluminum. The thickness of the conductive spacer 19 can be selected to be different according to the installation positions of the respective through-insulating rods 20 to ensure that the resistor chips 21 on the respective through-insulating rods 20 can be arranged staggeredly and to ensure the electrical connection between the lowermost resistor chip 21 and the lower conductor 14. The lower end of each first conductive spring 23 is in contact with the conductive fixing plate 22, and the upper end of each first conductive spring 23 is in contact with the upper conductor 17 to achieve the electrical connection between the uppermost resistor chip 21 and the upper conductor 17.

[0025] For example, when there are three vertical through-insulating rods 20 arranged in a circumferential array between the upper conductor 17 and the lower conductor 14, and 13 resistor chips 21 are sleeved on each through-insulating rod 20, for the convenience of description, the three through-insulating rods 20 can be named as the first through-insulating rod, the second through-insulating rod, and the third through-insulating rod in sequence along the circumferential direction, and the resistor chips 21 on each through-insulating rod 20 are named as the first-layer resistor chip, the second-layer resistor chip,..., the thirteenth-layer resistor chip from bottom to top in sequence. At this time, the first-layer resistor chip on the first through-insulating rod is in contact with the conductive spacer 19 at this position, and among the second-layer resistor chip to the thirteenth-layer resistor chip on the first through-insulating rod, two insulating pads 25 are provided on the upper and lower sides of any layer of resistor chip 21, and the insulating pads 25 are used to prevent direct contact and conduction between adjacent layers of resistor chips 21 and to prevent direct contact and conductive connection between the thirteenth-layer resistor chip and the corresponding conductive fixing plate 22.

[0026] The height of each layer of resistor chips 21 on the second through-insulating rod is slightly higher than the height of the resistor chips 21 on the same layer of the first through-insulating rod, and the height of each layer of resistor chips 21 on the second through-insulating rod is slightly lower than the height of the resistor chips 21 on the layer above the same layer of the first through-insulating rod. Moreover, for the first to thirteenth layer of resistor chips on the second through-insulating rod, two layers of insulating pads 25 are provided on both the upper and lower sides of any layer of resistor chips 21, and the insulating pads 25 are used to prevent direct conductive contact between adjacent layers of resistor chips 21, as well as to prevent direct conductive contact between the thirteenth layer of resistor chips and the corresponding conductive fixing plate 22, and to prevent direct conductive contact between the first layer of resistor chips and the corresponding conductive spacer 19.

[0027] The height of each layer of resistor chips 21 on the third through-insulating rod is slightly higher than the height of the resistor chips 21 on the same layer of the second through-insulating rod, the height of each layer of resistor chips 21 on the third through-insulating rod is slightly lower than the height of the resistor chips 21 on the layer above the same layer of the second through-insulating rod, and the height of each layer of resistor chips 21 on the third through-insulating rod is slightly lower than the height of the resistor chips 21 on the layer above the same layer of the first through-insulating rod. Moreover, the thirteenth layer of resistor chips on the third through-insulating rod is in direct conductive contact with the corresponding conductive fixing plate 22 at that location. For the first to twelfth layer of resistor chips on the third through-insulating rod, two layers of insulating pads 25 are provided on both the upper and lower sides of any layer of resistor chips 21, and the insulating pads 25 are used to prevent direct conductive contact between adjacent layers of resistor chips 21, as well as to prevent direct conductive contact between the first layer of resistor chips and the corresponding conductive spacer 19.

[0028] At the same time, the first layer of resistor chips on the first through-insulating rod is connected in series with the first layer of resistor chips on the second through-insulating rod through the conductive member 24, the first layer of resistor chips on the second through-insulating rod is connected in series with the first layer of resistor chips on the third through-insulating rod through the conductive member 24, the first layer of resistor chips on the third through-insulating rod is connected in series with the second layer of resistor chips on the first through-insulating rod through the conductive member 24, the second layer of resistor chips on the first through-insulating rod is connected in series with the second layer of resistor chips on the second through-insulating rod through the conductive member 24, the second layer of resistor chips on the second through-insulating rod is connected in series with the second layer of resistor chips on the third through-insulating rod through the conductive member 24,..., the twelfth layer of resistor chips on the third through-insulating rod is connected in series with the thirteenth layer of resistor chips on the first through-insulating rod through the conductive member 24, the thirteenth layer of resistor chips on the first through-insulating rod is connected in series with the thirteenth layer of resistor chips on the second through-insulating rod through the conductive member 24, and the thirteenth layer of resistor chips on the second through-insulating rod is connected in series with the thirteenth layer of resistor chips on the third through-insulating rod through the conductive member 24. Thus, all the resistor chips 21 on all the through-insulating rods 20 are sequentially connected in series through conductive members 24 such as copper sheets and are arranged in a spiral shape as a whole.

[0029] Embodiment 2 As Figure 7 , Figure 8 shown, Embodiment 2 provides a closing resistor structure of vertically-mounted series-connected circuit breakers, which includes at least two tanks 3, and a vertically-mounted series-connected resistor unit as described in Embodiment 1 is installed in each tank 3. All the vertically-mounted series-connected resistor units are sequentially connected in series through an elastic electrical connection module to form a closing resistor structure of the circuit breaker that meets the relevant resistance value requirements.

[0030] Specifically, as Figure 1 shown, a lower cover plate is installed at the bottom of the tank 3 through fasteners such as bolts, and a support conductor 11 is installed at the upper end of the lower cover plate. The upper end of the support conductor 11 is installed together with the insulating platform 10 of the corresponding vertically-mounted series-connected resistor unit through fasteners such as bolts, so as to realize the installation of the vertically-mounted series-connected resistor unit in the tank 3. An adjusting base 12 is provided at the lower end of the lower cover plate. A circle of adjusting bolts is provided at the edge of the mounting plate at the upper end of the adjusting base 12. The adjusting bolts sequentially penetrate through the tank 3, the lower cover plate and the mounting plate of the adjusting base 12 from top to bottom, and the upper end of the adjusting bolt penetrates through the tank 3 from bottom to top and is threadedly connected with at least one nut; Two nuts are threadedly connected between the lower cover plate and the adjusting base 12 in the middle of the adjusting bolt, and the upper nut of the two nuts abuts against the bottom surface of the lower cover plate, and the lower nut of the two nuts abuts against the top surface of the mounting plate of the adjusting base 12; The lower end of the adjusting bolt is threadedly connected with at least one nut after penetrating through the adjusting base 12 from top to bottom, and the nut at this place abuts against the bottom surface of the mounting plate of the adjusting base 12, so that the height of the tank 3 can be adjusted by adjusting the relative positions of the adjusting bolts and nuts at the adjusting base 12.

[0031] As Figure 7 shown, the elastic electrical connection module includes a bellows 2, and pot-type insulators 1 are installed at both ends of the bellows 2. Assembly contacts 2 are installed on the pot-type insulators 1, and a flexible connection conductor is connected between the assembly contacts 2 at both ends. An assembly contact 7 is installed at the end of the upper connection conductor, and the assembly contact 1 is electrically connected to the corresponding assembly contact 2, so as to realize the series connection between adjacent two tanks 3.

[0032] In addition, as a preference, in Embodiment 2, the lower connection conductor 13 can also be made of a flexible connection conductor, a bellows 5 is installed on the side of the tank 3, a pot-type insulator 4 is installed at the end of the bellows 5 far from the tank 3, an incoming and outgoing line connection conductor is installed on the pot-type insulator 4, and the incoming and outgoing line connection conductor is electrically connected to the lower connection conductor 13, so that the distance between the incoming and outgoing line connection conductor and the tank 3 can be adjusted by pulling the bellows 5 to meet the corresponding wiring requirements.

[0033] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vertically mounted series resistor unit, characterized in that: The invention comprises an upper conductor (17) and a lower conductor (14) arranged opposite to each other, wherein at least two through-hole insulating rods (20) are arranged in a circular array between the upper conductor (17) and the lower conductor (14); the lower end of the through-hole insulating rod (20) is fixedly connected to the lower conductor (14); the upper end of the through-hole insulating rod (20) passes through a conductive pad (19), a resistor (21), a conductive fixing plate (22), and a conductive spring (23) in sequence from bottom to top and is then fixed to the upper conductor (17); the lower end of the conductive pad (19) contacts the lower conductor (14), the lower end of the conductive spring (23) contacts the conductive fixing plate (22), and the conductive spring (23) contacts the conductive fixing plate (22). The upper end of the spring 1 (23) contacts the upper conductor (17); the number of resistor sheets (21) on each through-hole insulating rod (20) is at least two, and all the resistor sheets (21) are arranged in a spiral shape and connected in series in sequence through the conductive member (24); the resistor sheet (21) at the lowest end contacts the conductive pad (19) at the corresponding through-hole insulating rod (20), and the resistor sheet (21) at the highest end contacts the conductive fixing plate (22) at the corresponding through-hole insulating rod (20), and any resistor sheet (21) located between the lowest resistor sheet (21) and the highest resistor sheet (21) is provided with insulating pads (25) on both upper and lower sides.

2. The vertically mounted series resistor unit according to claim 1, characterized in that: A lower mounting hole on the lower conductor (14) for mounting a through-hole insulating rod (20) and an upper mounting hole on the upper conductor (17) for mounting a through-hole insulating rod (20) are both stepped holes. Lock rings (18) are mounted on the lower and upper ends of the through-hole insulating rod (20). The upper end of the lock ring (18) at the lower end of the through-hole insulating rod (20) abuts against the stepped surface of the lower mounting hole, and the lower end of the lock ring (18) at the upper end of the through-hole insulating rod (20) abuts against the stepped surface of the upper mounting hole.

3. The vertically mounted series resistor unit according to claim 1, characterized in that: A lower connecting conductor (13) is installed on one side of the lower conductor (14), and an upper connecting conductor is provided on one side of the upper conductor (17).

4. The vertically mounted series resistor unit according to claim 3, characterized in that: A slot is provided on the side of the lower conductor (14), and a circle of slots is provided on the slot wall. A second annular conductive spring (15) is installed in the slot; when the lower connecting conductor (13) is inserted into the slot, the second conductive spring (15) abuts against the side wall of the lower connecting conductor (13).

5. The vertically mounted series resistor unit according to claim 1, characterized in that: A conductive transition plate (8) is installed on the bottom surface of the lower conductor (14), a shield (9) is installed on the outer edge of the bottom surface of the conductive transition plate (8), and an insulating platform (10) is installed in the middle of the bottom surface of the conductive transition plate (8).

6. A circuit breaker closing resistor structure installed vertically in series, characterized in that: It comprises at least two tank bodies (3), each tank body (3) being equipped with a vertically mounted series resistor unit according to any one of claims 1 to 5, and all the vertically mounted series resistor units being sequentially connected in series via an elastic electrical connection module.

7. The circuit breaker closing resistor structure vertically mounted in series according to claim 6, characterized in that: The elastic electrical connection module comprises a bellows 1 (2), both ends of the bellows 1 (2) are equipped with a pot-type insulator 1 (1), both ends of the pot-type insulator 1 (1) are equipped with a mounting contact seat 2, and a flexible connecting conductor is connected between the mounting contact seats 2 at both ends, and the end of the upper connecting conductor is equipped with a mounting contact seat 1 (7), and the mounting seat 1 is electrically connected to the corresponding mounting contact seat 2.

8. The circuit breaker closing resistor structure vertically mounted in series according to claim 6, characterized in that: The lower connecting conductor (13) is a flexible connecting conductor. A second corrugated tube (5) is installed on the side of the tank body (3). A second pot-type insulator (4) is installed on the end of the second corrugated tube (5) away from the tank body (3). An inlet and outlet connecting conductor is installed on the second pot-type insulator (4). The inlet and outlet connecting conductor is electrically connected to the lower connecting conductor (13).

9. The circuit breaker closing resistor structure vertically mounted in series according to claim 6, characterized in that: A lower cover plate is provided at the bottom of the tank body (3), a supporting conductor (11) is installed at the upper end of the lower cover plate, and the upper end of the supporting conductor (11) is installed together with an insulating platform (10) corresponding to the vertically mounted series resistor unit via a fastener.

10. The circuit breaker closing resistor structure installed vertically in series according to claim 6, characterized in that: An adjustment base (12) is provided at the lower end of the lower cover plate.

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