JP7089370B2 - Tap switcher and static induction device with it - Google Patents

Description

An embodiment of the present invention relates to a tap switch and a stationary induction device having the tap changer.

For example, a stationary induction device such as a transformer having a tap changer is provided with an operator such as a handle for switching the tap position outside the tank, and this operator has been conventionally used as in Patent Document 1, for example. It was connected to the tap changer via the drive shaft.

Japanese Unexamined Patent Publication No. 2005-31017

However, in the case of the conventional structure, the relative position between the tap switch and the operator, more strictly, the relative position in the left-right direction and the front-rear direction of the tank is fixed, so the arrangement of the operator can be freely selected. It was not possible and the degree of freedom of placement was low. Further, in the case of the conventional structure, since the operator is arranged at the upper part of the tank, it is difficult to operate the operator from the ground in a large transformer or the like, and the tap position can be confirmed from the ground. It was difficult.

Therefore, a tap changer capable of increasing the degree of freedom in arranging the controls and easily operating the controls and confirming the tap position, and a stationary guidance device having the tap changer are provided.

The tap switch according to the embodiment has a plurality of fixed contacts to which a plurality of tap wires drawn from the windings are connected, and two fixed contacts that are relatively movable with respect to the fixed contacts. A rotation consisting of a movable contactor that electrically connects the children, a slide plate on which the movable contactor is arranged and partly cut, and a gear that rotates by engaging with the teeth of the slide plate. A mechanism, an operator provided outside the tank and capable of forward and reverse rotation operations , and a plurality of tap positions provided outside the tank and switchable by rotating the operator are recognizable. The identifier, the operating side rotating body provided inside the tank and rotating integrally and coaxially with the rotating shaft of the operator, and the operating side rotating body are wound at different positions in the opposite directions and axial directions with respect to the operating side rotating body, and are operated. It is equipped with two operation cables that connect between the child side and the rotation mechanism side and transmit the rotational movement of the actuator to rotate the gears, and an outer tube that houses the operation cable under tension. , The identifier indicates each tap position in order in the circumferential direction along the rotation direction of the operator, and when switching from the current tap position to the next tap position, the next tap position indicated by the identifier. By rotating the operator in the direction opposite to the direction of rotation to, it is possible to switch to the next tap position.

The figure which shows typically the structure of the transformer of an embodiment. The figure which shows the tap changer schematically The figure which shows the drive side rotating body schematically Diagram showing the operation cable schematically The figure which shows the handle and the rotating body on the operation side schematically. The figure which shows the outer tube schematically The figure which shows typically the winding state and the rewinding state of the drive side rotating body. The figure which shows the operation mode of the handle schematically.

Hereinafter, embodiments will be described with reference to the drawings.
As shown in FIG. 1, the transformer 1 as a static induction device in the present embodiment has a tank 2, an iron core 3 housed in the tank 2, and a transformer main body having a transformer winding 4 as a winding. 5. It is provided with a tap switch 6, a handle 7 as an operator provided outside the tank 2, and the like. The tank 2 of the transformer 1 is filled with insulating oil (not shown), and the transformer main body 5 is housed in a state of being immersed in the insulating oil.

As is well known, the iron core 3 constituting the transformer main body 5 is formed by laminating, for example, thin plate-shaped electromagnetic steel plates. In the present embodiment, a tripod iron core having three legs is adopted as the iron core 3. A transformer winding 4 is provided on each leg of the iron core 3. These three transformer windings 4 correspond to three phases of U phase, V phase and W phase, respectively.

The transformer winding 4 of each phase is provided, for example, at the upper part of the tank 2, and is connected to each of the three bushings 8 communicating with the tank 2. Further, the transformer winding 4 of each phase has a tap wire 9 drawn out and is connected to the tap terminal 10 of the tap changer 6. The tap terminal 10 corresponds to a fixed contact. Since the tap wire 9 is well known, detailed description thereof will be omitted, but the tap wire 9 is provided to make the turns ratio of the transformer 1 variable.

More specifically, as shown in FIG. 2, the tap switcher 6 has a terminal plate 11 in which six tap terminals 10 are provided corresponding to each phase, and any two taps of each phase. Three movable contacts 12 that electrically connect the terminals 10 are provided, and the slide plate 13 is partially geared, and the slide plate 13 is engaged with the gear cut portion 13a to rotate. It is provided with a gear 14 that slides the slide plate 13 in a straight line. The slide plate 13 and the gear 14 together with the drive-side rotating body 15 described later constitute a so-called rack and pinion type rotating mechanism.

Assuming that the six tap terminals 10 of each phase provided on the terminal plate 11 are numbered 1 to 6 in order from the left side, that is, the side opposite to the gear 14, the terminal plate 11 has the number 1 of each phase. The tap terminals 10 from No. 6 to No. 6 are arranged at equal intervals (T) from each other, and are arranged so that the distances to the tap terminals 10 having the same number in other phases are equal. Further, the three movable contacts 12 provided on the slide plate 13 are arranged at equal intervals from each other.

Therefore, when the movable contact 12 corresponding to the U phase is in the position of electrically connecting between the first and second tap terminals 10, the movable contact 12 corresponding to the V phase is also the first and second taps. The positions are such that the terminals 10 are electrically connected, and the movable contactor 12 corresponding to the W phase is also located at the position where the first and second tap terminals 10 are electrically connected.

Although not shown, the tap terminal 10 penetrates the terminal plate 11 and is electrically connected by the movable contact 12 at a portion protruding toward the back surface side of the terminal plate 11, that is, the slide plate 13 side. It has a structure. Hereinafter, the tap position where the movable contact 12 of each phase electrically connects between the first and second tap terminals 10 is referred to as the first position (P1), and the second and third tap terminals 10 are electrically connected. The tap position for electrically connecting is referred to as the second position (P2), the tap position for electrically connecting between the third and fourth tap terminals 10 is referred to as the third position (P3), and the fourth and fifth tap positions are referred to. The tap position that electrically connects the tap terminals 10 is referred to as a fourth position (P4), and the tap position that electrically connects the fifth and sixth tap terminals 10 is referred to as a fifth position (P5).

Further, moving the movable contact 12 from an adjacent position such as, for example, the first position (P1) to the second position (P2) is also referred to as a movement for one tap for convenience. Note that FIG. 2 schematically shows a state in which the movable contact 12 is in the first position (P1). However, the number of tap terminals 10 and the number of tap positions shown in the present embodiment are examples, and are not limited thereto.

The tap position of the tap switch 6 is switched by operating the handle 7 provided on the tank 2. The handle 7 is operated by an operator, and can perform forward rotation and reverse rotation. Here, it is assumed that forward rotation is a clockwise rotation operation when viewed from the operator, and reverse rotation is a counterclockwise rotation operation when viewed from the opposite operator.

Further, although the handle 7 is provided on the right side surface of the tank 2 shown in FIG. 1 in the front view in the present embodiment, the handle 7 may be provided on the left side surface, the front surface, or the back surface. That is, the handle 7 can be provided on the side surface of the tank 2, that is, on any side surface vertically rising from the ground, at a position capable of being operated and visually recognized from the ground. Of course, it can also be attached to the upper surface of the tank 2.

The handle 7 side and the tap switch 6 side are connected by two operation cables 16 (see FIG. 7) that transmit the forward and reverse rotation operations of the handle 7 to the tap switch 6 side. More specifically, the drive-side shaft member 14a, which is the rotation shaft of the gear 14 of the tap switcher 6, has a drive-side rotation that rotates integrally and coaxially with the drive-side shaft member 14a as a rotation mechanism for rotating the gear 14. A body 15 is provided. As schematically shown in FIG. 3, the drive-side rotating body 15 has a thin disk shape in which a through hole 15a for passing the drive-side shaft member 14a is formed in the center, and the corner portions in the side view are formed. It is formed in a curved surface chamfered shape.

Further, the drive side rotating body 15 has two cable grooves 15b formed at different positions in the thickness direction on the outer peripheral surface thereof, and the end portion of the operation cable 16 shown in FIG. 4 corresponding to each cable groove 15b. A housing unit 15c for accommodating the connection terminal 16a of the above is provided. The accommodating portion 15c is formed at a position displaced by 120 ° in the circumferential direction of the driving side rotating body 15 in a plan view. That is, one end side of each of the two operation cables 16 is fixed to the gear 14 side, that is, the drive side rotating body 15. The details will be described later, but the two operation cables 16 are wound in opposite directions to each other, and the gear 14 is pulled by pulling the drive-side rotating body 15 with the forward and reverse rotation operations of the handle 7. Rotate.

In the drive side rotating body 15, the diameter of the portion where the cable groove 15b is formed, that is, the winding diameter when the operation cable 16 is wound is set to D1. This winding diameter (D1) also corresponds to the winding diameter of the operation cable 16 in the rotation mechanism. Further, the winding diameter (D1) is set to be larger than the gear diameter (D2) of the gear 14 that rotates coaxially. The details of the relationship between the winding diameter (D1) and the gear diameter (D2) will be described later.

The other end side of the operation cable 16 is connected to the handle 7 side. More specifically, as schematically shown in FIG. 5, the other end side of the operation cable 16 is fixed to the operation side rotating body 18 provided on the handle 7 side. Although a simplified diagram is shown in FIG. 5, the handle 7 and the operation side open unit 18 are watertightly and airtightly provided inside and outside the tank 2.

The operation-side rotating body 18 is formed in a substantially columnar shape, and a spiral groove 18a for aligning and winding the operation cable 16 is formed on the outer peripheral surface thereof. The end of the operation cable 16 may be provided with a connection terminal 16a in the same manner as the drive-side rotating body 15, but the end may be fixed by caulking or the like in order to obtain an appropriate length. be able to.

The operation-side rotating body 18 is attached to the operation-side shaft member 7a, which is the rotation shaft of the handle 7, and rotates integrally and coaxially with the operation-side shaft member 7a, and the two operation cables 16 are wound in opposite directions to each other. Be done. At this time, the diameter of the spiral groove 18a, that is, the winding diameter (D3) around which each operation cable 16 is wound is set to be smaller than the winding diameter (D1) of the driving side rotating body 15. The details of the relationship between the winding diameter (D3) and the winding diameter (D1) will be described later.

Further, an outer tube 19 shown in FIG. 6 is provided between the driving side rotating body 15 and the operating side rotating body 18. The outer tube 19 accommodates each operation cable 16 in a slidable and tensioned state. Here, the state in which tension is applied means a state in which the operation cable 16 is maintained in a tense state from the drive-side rotating body 15 to the operating-side rotating body 18. The outer tube 19 is composed of a tube body 19a and an adjuster 19b provided on at least one side of the tube body 19a.

The adjuster 19b is arranged so as to draw a fixed arc, for example, in the middle of the path from the driving side rotating body 15 to the operating side rotating body 18, and by rotating the adjuster 19b, for example, in the longitudinal direction of the tube body 19a. By moving the adjuster 19b relatively to change the radius of the arc, the tension of the operation cable 16 can be adjusted. The path of the operation cable 16 may be configured to be provided with an adjustment mechanism for adjusting the tension instead of the adjuster 19b or in addition to the adjuster 19b, and the direction of the operation cable 16 may be changed to a substantially right angle. It is also possible to provide a movable roller at the position where it is to be installed. Further, a plurality of outer tubes 19 may be provided in the path of the operation cable 16.

Next, the operation of the above configuration will be described.
As described above, in the case of the conventional structure, since the position of the operator is fixed, it is not possible to freely select the arrangement of the operator, and it is necessary to arrange the operator on the upper part of the tank 2. Therefore, it was difficult to operate the operator from the ground and to confirm the tap position from the ground, especially in a large transformer. Further, when the size of the tap switch 6 is increased, the rotational torque of the actuator also increases, so that there is a problem that a large force is required for the operation.

Therefore, in the present embodiment, the degree of freedom in arranging the handle 7 can be increased as follows, and the handle 7 can be operated and the tap position can be easily confirmed from the ground. There is.

First, in the transformer 1 of the present embodiment, as described above, the handle 7 side operated by the operator and the tap changer 6 side for switching taps are connected by two operation cables 16. As a result, the operation cable 16 can be routed in various ways, and the relative position of the handle 7 with respect to the tap switch 6 can be freely selected. Therefore, the degree of freedom in arranging the handle 7 can be increased, for example, by operating the handle 7 from the ground or arranging the handle 7 at a position where the tap position can be confirmed.

Further, in the embodiment, the winding diameter (D1) of the driving side rotating body 15 is set to be larger than the gear diameter (D2) of the gear 14, and the winding diameter (D3) of the operating side rotating body 18 is set to the driving side rotating body 15. It is set smaller than the winding diameter (D1) of. This makes it possible to reduce the force applied to the handle 7 when switching taps, as described below.

FIG. 7 is a plan view of the driving side rotating body 15 as viewed from above, and is shown together with the positions of the first position (P1) to the fifth position (P5). The drive-side rotating body 15 is assigned the first position (P1) to the fifth position (P5) at five of the positions divided into six equal parts in the circumferential direction. That is, in the present embodiment, the movable contact element 12 can be moved from the first position (P1) to the fifth position (P5) in a state where the rotation of the driving side rotating body 15 is less than one rotation.

In this case, since it is not necessary to wind the operation cable 16 around the driving side rotating body 15 a plurality of times, the shape of the driving side rotating body 15 and the actual manufacturing can be simplified. Hereinafter, the state in which the movable contact 12 is located at the first position (P1) is referred to as a rewinding state, and the state in which the movable contact 12 is located at the fifth position (P5) is referred to as a winding state. do. Further, for the sake of simplification of the explanation, the operation cable 16 that pulls the drive side rotating body 15 to rotate the drive side rotating body 15 in the direction indicated by the arrow CW when rewinding is referred to as a rewinding side operation cable 16A. The operation cable 16 that pulls the drive-side rotating body 15 to rotate the drive-side rotating body 15 in the direction indicated by the arrow CCW when winding up is referred to as a winding-side operating cable 16B.

At this time, since the drive-side rotating body 15 rotates integrally with the gear 14, the apparent difference distance (L1) of the operation cable 16 between the rewinding state and the winding state shown in FIG. 7 is the movable contact 12 Corresponds to the length required when moving from the first position (P1) to the fifth position (P5).

Here, what is referred to as apparent is that the position of the end portion of the operation cable 16 does not actually move, but the length of the operation cable 16 wound around the rotating body 18 on the operation side changes. Is. In the rewinding state shown in FIG. 7, many operating cables 16A on the rewinding side were wound around the rotating body 18 on the operating side as shown in FIG. 5, and the operating cable 16B on the rewinding side was almost sent out. It is in a state.

In this case, if the winding diameter (D1) of the drive-side rotating body 15 is made larger than the gear diameter (D2) of the gear 14, the gear 14 can be rotated with a smaller force. Therefore, the gear diameter (D2) of the gear 14 and the winding diameter (D1) of the drive-side rotating body 15 are set so as to satisfy the relationship of the following equation (1).
D1> D2 ... (1)

Further, since the rotation amount of the drive side rotating body 15 and the rotation amount of the gear 14 have a one-to-one relationship, 1/6 of the length of one rotation of the winding diameter (D1) is one tap. It corresponds to the moving distance of minutes, that is, the distance (T) between the tap terminals 10. Therefore, the gear diameter (D2) of the gear 14 and the winding diameter (D1) of the drive-side rotating body 15 are set so as to satisfy the relationship of the following equation (2).
(1/6) ・ D1 ・ π = T ・ ・ ・ (2)

Since the drive-side rotating body 15 and the gear 14 are manufactured by machining, a range that generally satisfies the equation (2) with a predetermined tolerance such as D1 = 150 mm when T = 40 mm. By setting to, it is possible to prevent the manufacturability from being excessively deteriorated.

By the way, on the tap switcher 6 side, the winding diameter (D1) and the gear diameter (D2) may be set so as to be able to move by the required distance as described above, but on the handle 7 side, when operating. There are other things to consider besides reducing the force required. Specifically, since the handle 7 is operated by the operator, the operator can grasp the current tap position and the tap position to be switched, and each tap position can be clearly classified and recognized. It is required not to make an erroneous operation.

Of these, as shown in FIG. 8, for the worker to be able to grasp the current tap position and the tap position to be switched, for example, "P1", "P2", "P3", "P4" by a name plate, a stamp, or the like. By arranging the character identifier (M1) such as "P5" at five positions of the handle 7, for example, dividing the rotation direction of the handle 7 into six equal parts in the circumferential direction, the current tap position, the tap position to be switched, and the operation can be performed. It is considered that the direction to be should be grasped and each tap position can be clearly divided and recognized.

Further, it is considered that it is possible to prevent an erroneous operation by arranging an identifier (M2) by characters such as "rewind" and "wind up" and an arrow. In the case of rewinding, it is possible to switch to the next tap position by rotating it counterclockwise by 300 °.

By the way, in order to reduce the force required for rotating the handle 7, simply speaking, if the winding diameter (D3) of the operating side rotating body 18 is made larger than the winding diameter (D1) of the driving side rotating body 15. , It is thought that it can be operated with a smaller force. However, if such a relationship is established, the above-mentioned 6 equal parts cannot be arranged and the distance between the switching positions must be reduced, and the distance between the switching positions becomes small, so that the handle 7 is strict. It is necessary to adjust the position of, which may reduce workability.

Therefore, in the present embodiment, when the tap positions of the first position (P1) to the fifth position (P5) are arranged counterclockwise so as to be adjacent to each other evenly and in order in the rotation direction of the handle 7, the arrow mark is used. As shown in the above, the operation direction of the handle 7 is set to be opposite to the arrangement order of each tap position. That is, for example, when the tap position is switched from the first position (P1) to the second position (P2), the handle 7 is rotated by 5/6 of one round, that is, by 300 °. As a result, the tap position can be switched when the rotation of the handle 7 is less than one rotation, and the possibility of an operation error occurring can be reduced as compared with the case where the handle 7 is rotated several times.

At this time, the winding diameter (D3) of the operating side rotating body 18 and the winding diameter (D1) of the driving side rotating body 15 are set so as to satisfy the relationship of the following equation (3).
(5/6) ・ D3 ・ π = (1/6) ・ D1 ・ π
That is, D3 = (1/5), D1 ... (3)

Therefore, for example, when T = 40 mm and D1 = 150 mm as described above, D3 = 30 mm. As a result, the size of the rotating body 18 on the operation side can be reduced. Since the operating side rotating body 18 is also manufactured by machining, it is possible to prevent the manufacturability from being excessively deteriorated by setting a predetermined tolerance within a range that generally satisfies the equation (3). .. Of course, the drive-side rotating body 15 and the operating-side rotating body 18 can be designed so as to strictly satisfy the equations (2) and (3).

In this case, assuming that the maximum torque on the gear 14 side when switching the tap position is X [Nm], the force (F1) required to rotate the drive side rotating body 15 is F1 = X / 9.8. (2 / D1) [kgf]. It is assumed that the unit conversion is appropriate. Since the torque (Y) of the drive-side rotating body 15 required to rotate the driving-side rotating body 15 by the force (F1) is Y = F1 ・ 9.8 ・ (D3 / 2) [Nm]. Even if there is some margin, it will be about X / 5.

Therefore, if the length of the handle 7, that is, the position where the operator is expected to touch the handle 7 when operating the handle 7, is taken into consideration, the force required for operating the handle 7 can be further reduced, which is easy. The handle 7 can be rotated. Further, since the ratio of the rotation amount of the drive side rotating body 15 to the rotation amount of the operation side rotating body 18 is 1: 5, even if the hand shakes when operating the operation side rotating body 18, the shaking occurs. Since the influence on the tap position is suppressed to 1/5, the workability when operating the handle 7 can be improved.

According to the transformer 1 described above, the following effects can be obtained.
The tap changer 6 of the embodiment is movable relative to a plurality of fixed contacts to which a plurality of tap wires 9 drawn from the transformer winding 4 are connected, respectively, and to the fixed contacts. The movable contact 12 that electrically connects the two fixed contacts, the slide plate 13 on which the movable contact 12 is arranged and partially geared, and the teeth of the slide plate 13 A gear 14 that meshes and rotates, a rotation mechanism that rotates the gear 14, a handle 7 as an operator provided outside the tank 2 of the transformer 1 and capable of forward and reverse rotation operations, and a handle 7 side. Two operation cables 16 that connect between the and the rotation mechanism side and transmit the rotation operation of the handle 7 to rotate the gear 14, and an outer tube 19 that houses the operation cable 16 in a tensioned state. To prepare for.

As a result, the relative position of the handle 7 with respect to the tap switch 6 can be freely selected by taking various paths of the operation cable 16, and the position where the handle 7 can be operated from the ground and the tap position can be confirmed. It is possible to increase the degree of freedom in arranging the handle 7, such as being able to arrange it in. Therefore, the degree of freedom in the arrangement of the handle 7 can be increased, and the operation of the handle 7 and the confirmation of the tap position can be easily performed. In this case, by arranging the handle 7 at a position in consideration of the peripheral equipment of the transformer 1, for example, the degree of freedom in installing the transformer 1 when installing it in a substation or the like can be improved.

Further, the tap switch 6 rotates integrally with the rotating shaft of the gear 14, and the ends of the two operating cables 16 are fixed to each other, and the two operating cables 16 are oriented in opposite directions. The drive-side rotating body 15 to be wound around is provided as a rotation mechanism, and the winding diameter (D1) when the operation cable 16 is wound around the drive-side rotating body 15 is made larger than the gear diameter (D2) of the gear 14. .. As a result, the force required to rotate the gear 14 is reduced, so that the handle 7 can be easily rotated even if it is a large one.

Further, the tap switch 6 rotates integrally with the rotating shaft of the handle 7, and the ends of the two operating cables 16 are fixed to each other, and the two operating cables 16 are oriented in opposite directions. The operation side rotating body 18 is provided, and the winding diameter (D3) when the operation cable 16 is wound around the operation side rotating body 18 is set to the winding diameter (D1) when the operation cable 16 is wound around the rotating mechanism. ).

As a result, the size of the operation-side rotating body 18 can be reduced, and the rotation mechanism, that is, the rotation amount of the drive-side rotating body 15 and the rotation amount of the driving-side rotating body 15 in the embodiment are different from each other, so that the operation can be performed. Even if the hand shakes when operating the side rotating body 18, the influence of the shaking on the tap position is suppressed, so that the workability when operating the handle 7 can be improved.

Further, by setting the winding diameter (D3) of the operating side rotating body 18 to 1/5 of the winding diameter (D1) of the driving side rotating body 15 as in the embodiment, it is necessary to rotate the driving side rotating body 15. It is possible to suppress the occurrence of operation errors without increasing the force. Further, in the transformer 1, the handle 7 is arranged on the side surface of the tank 2. As a result, the operation of the handle 7 and the confirmation of the tap position can be easily performed from the ground.

In the embodiment, the transformer 1 has been described as an example of the static induction device, but as the static induction device, for example, a reactor or the like can be adopted in addition to the transformer 1. That is, the tap changer 6 can be applied not only to the transformer 1 but also to other devices such as a reactor.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

In the drawing, 1 is a transformer (static induction device), 2 is a tank, 3 is an iron core, 4 is a transformer winding (winding), 5 is a transformer body, 6 is a tap switch, and 7 is a handle (operator). ), 7a is the operation side shaft member (rotating shaft of the operator), 9 is the tap wire, 10 is the tap terminal (fixed contact), 12 is the movable contactor, 13 is the slide plate, 14 is the gear, and 14a is the drive side. A shaft member (rotating shaft of a gear), 15 is a driving side rotating body, 16 is an operation cable, 18 is an operating side rotating body, and 19 is an outer tube.

Claims (5)

Electrically between a plurality of fixed contacts to which a plurality of tap wires drawn from the winding are connected, and between any two of the fixed contacts that are relatively movable relative to the fixed contact. A rotating mechanism composed of a movable contactor to be connected, a slide plate on which the movable contactor is arranged and partially geared, and a gear that meshes with the teeth of the slide plate and rotates.
An operator that is installed outside the tank and is capable of forward and reverse rotation,
An identifier provided outside the tank and recognizable to recognize a plurality of tap positions that can be switched by rotating the operator.
An operation-side rotating body provided inside the tank and rotating coaxially with the rotating shaft of the operator.
The gears are wound at different positions in opposite directions and axial directions with respect to the rotating body on the operating side, are connected between the operating element side and the rotating mechanism side, and transmit the rotational operation of the operating element. Two operation cables to rotate and
It is equipped with an outer tube that accommodates the operation cable in a tensioned state.
The identifier indicates each tap position in order in the circumferential direction along the rotation direction of the operator.
When switching from the current tap position to the next tap position, switching to the next tap position is performed by rotating the operator in the direction opposite to the rotation direction to the next tap position indicated by the identifier. A tap switch that is characterized by making it possible . On the rotating shaft of the gear, there is a drive-side rotating body that rotates integrally with the rotating shaft, fixes the ends of the two operating cables, and winds the two operating cables in opposite directions. It is provided as the rotation mechanism and
The tap switch according to claim 1, wherein the winding diameter when the operation cable is wound around the drive-side rotating body is made larger than the gear diameter of the gear. The tap according to claim 1 or 2, wherein the winding diameter when the operation cable is wound around the operating side rotating body is smaller than the winding diameter when the operating cable is wound around the rotating mechanism. Switcher. The tap switch according to any one of claims 1 to 3, wherein the operator is arranged on a side surface in a state where the tank is installed. A stationary induction device comprising the tap switch according to any one of claims 1 to 4.

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