Contact system of a disconnector

Abstract

The present invention provides a contact system for an isolating switch, comprising: a contact module body, on which are provided a movable contact and a stationary contact that can be connected or disconnected; and a stationary contact having a first connecting plate and a second connecting plate that are bent and connected and have opposite current directions, wherein the movable contact and the stationary contact are in a disconnected position between the first connecting plate and an arc extinguishing chamber, and the second connecting plate is located on the side of the first connecting plate away from the arc extinguishing chamber. When the circuit breaker is disconnected, an arc is generated between the movable and stationary contacts. The magnetic fields generated by the first connecting plate and the second connecting plate below the arc have the same direction, while the magnetic fields generated above the arc have opposite directions. That is, the resultant magnetic flux on the upper and lower sides of the arc is unequal, with the lower side being greater than the upper side. This generates a strong electromagnetic force that blows the arc toward the arc extinguishing chamber, thereby facilitating rapid arc extinguishing and achieving a good arc extinguishing effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-voltage electrical apparatus, in particular to a contact system of a disconnecting switch. BACKGROUND

[0002] The disconnecting switch is used to prevent or allow current flow in the power-on state, to realize reliable isolation of the power-off part and the live part in the power distribution device, and is widely used in power systems such as photovoltaic and wind power.

[0003] The contact system of the disconnecting switch includes a moving contact and a static contact. The moving contact and the static contact will generate an arc when breaking, which will cause damage to the components and seriously affect the performance of the disconnecting switch. However, the arc extinguishing effect of the existing disconnecting switch is general. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is to overcome the defect that the arc extinguishing effect of the existing disconnecting switch is general, so as to provide a contact system of a disconnecting switch with good arc extinguishing effect.

[0005] To this end, the present application provides a contact system of a disconnecting switch, comprising a contact module body, wherein a moving contact and a static contact that can be in contact or disconnected are arranged on the contact module body; the static contact has a first connecting plate and a second connecting plate that are connected by bending and have opposite current directions, wherein the breaking-off position of the moving contact and the static contact is between the first connecting plate and an arc extinguishing chamber, and the second connecting plate is located on the side of the first connecting plate away from the arc extinguishing chamber.

[0006] The first connecting plate and the second connecting plate are bent into a U shape.

[0007] The static contact has a first static contact plate and a second static contact plate, wherein when closing, the second static contact plate contacts the moving contact first before the first static contact plate; when opening, the second static contact plate is disconnected from the moving contact after the first static contact plate.

[0008] The moving contact has a first moving contact plate and a second moving contact plate, wherein when closing, the second moving contact plate contacts the static contact first before the first moving contact plate; when opening, the second moving contact plate is disconnected from the static contact after the first moving contact plate.

[0009] The length of the second static contact plate is longer than that of the first static contact plate, the length of the second moving contact plate is longer than that of the first moving contact plate, and the second moving contact plate can be in contact communication or disconnected with the second static contact plate, and the first moving contact plate can be in contact communication or disconnected with the first static contact plate; when closing, the second moving contact plate is first in contact communication with the second static contact plate, and the first moving contact plate is later in contact communication with the first static contact plate; when opening, the second moving contact plate is first disconnected from the second static contact plate, and the first moving contact plate is later disconnected from the first static contact plate.

[0010] The first static contact plate is vertically arranged on one side of the first connecting plate, and the second static contact plate is L-shaped, the horizontal plate part of the L-shaped second static contact plate is fixedly connected with the second connecting plate, and the vertical plate part is arranged with a gap between the vertical plate part and the first static contact plate, and the plane where the vertical plate part is arranged is perpendicular to the plane where the first static contact plate is arranged.

[0011] The vertical plate part extends to the inside of the arc extinguishing chamber.

[0012] Further comprising a magnetic enhancement sheet fixed between the horizontal plate part and the second connecting plate.

[0013] The contact module body is rotatably provided with a moving contact frame, the moving contact frame is provided with two moving contacts arranged on both sides of the rotation center of the moving contact frame, and the static contact and the arc extinguishing chamber correspond to two, wherein the rotation angle of the moving contact frame is 0-110°.

[0014] The cross section of the contact module body is square.

[0015] The technical scheme of the application has the following advantages:

[0016] 1. The contact system of the isolating switch provided by the application, the opening and disconnecting position of the moving contact and the static contact is between the first connecting plate and the arc extinguishing chamber, the second connecting plate is located on the side of the first connecting plate away from the arc extinguishing chamber, and the current directions of the first connecting plate and the second connecting plate are opposite, when the circuit breaker is disconnected, an arc is generated between the moving contact and the static contact, the magnetic field directions generated by the first connecting plate and the second connecting plate below the arc are the same, and the magnetic field directions generated above the arc are opposite, that is, the composite magnetic fluxes on the upper and lower sides of the arc are not equal, the lower side is greater than the upper side, so that a strong electromagnetic force is generated to blow the arc to the arc extinguishing chamber, thereby facilitating the rapid extinguishing of the arc, and the arc extinguishing effect is good.

[0017] 2. The contact system of the isolating switch, the static contact has a first static contact plate and a second static contact plate, wherein, when closing, the second static contact plate contacts the moving contact first than the first static contact plate; when opening, the second static contact plate separates from the moving contact later than the first static contact plate, so that the arc is only generated between the second static contact plate and the moving contact, and the first static contact plate is far away from the arc, so that it is used as the main static contact and is not easy to be ablated by the arc, prolonging the service life.

[0018] 3. The contact system of the isolating switch, the moving contact has a first moving contact plate and a second moving contact plate, wherein, when closing, the second moving contact plate contacts the static contact first than the first moving contact plate; when opening, the second moving contact plate separates from the static contact later than the first moving contact plate, so that the arc is only generated between the second moving contact plate and the static contact, and the first moving contact plate is far away from the arc, so that it is used as the main moving contact and is not easy to be ablated by the arc, prolonging the service life.

[0019] 4. The contact system of the isolating switch, the length of the second static contact plate is longer than the length of the first static contact plate, the length of the second moving contact plate is longer than the length of the first moving contact plate, and the second moving contact plate can contact or separate from the second static contact plate, and the first moving contact plate can contact or separate from the first static contact plate, so that the arc is only generated between the second moving contact plate and the second static contact plate, and the first moving contact plate and the first static contact plate are far away from the arc, so that they are used as the main moving contact and the main static contact respectively, and are not easy to be ablated by the arc, prolonging the service life.

[0020] 5. The contact system of the isolating switch, the rotation angle of the moving contact frame is 0-110°, so that the opening distance between the moving contact and the static contact is large, improving the breaking capacity, and the cross section of the contact module body is square, and the moving contact frame rotates around the center of the contact module body, so that the space is effectively utilized. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0022] Figure 1 It is a perspective view of the isolating switch of the present application;

[0023] Figure 2 It is an exploded structural schematic view of Figure 1

[0024] ​Figure 3 is a schematic view of a contact module;

[0025] Figure 4 is an exploded view of a moving contact holder, a moving contact and a stationary contact;

[0026] Figure 5 is an assembly view of a moving contact holder and a moving contact;

[0027] Figure 6 is an exploded view of Figure 5

[0028] Figure 7 is a perspective view of a stationary contact;

[0029] Figure 8 is an exploded view of a stationary contact;

[0030] Figure 9 is a perspective view of an operating module;

[0031] Figure 10 is a perspective view of a manual operating mechanism;

[0032] Figure 11 is a perspective view of a transmission mechanism;

[0033] Figure 12 is a perspective view of a rotary disc holder;

[0034] Figure 13 is a perspective view of Figure 11 with the top plate of the rotary disc holder removed;

[0035] Figure 14 is an exploded view of a first spindle and a rotary disc assembly;

[0036] Figure 15 is another perspective view with the rotary disc holder rotated through an angle; Figure 13

[0037] Figure 16 is an assembly view of an energy storage snap assembly;

[0038] Figure 17 is an exploded view of an energy storage snap assembly.

[0039] ​​Explanation of reference signs: 1, contact module; 10, contact module body; 11, moving contact; 113, first moving contact plate; 114, second moving contact plate; 12, stationary contact; 121, first connecting plate; 122, second connecting plate; 123, first stationary contact plate; 124, second stationary contact plate; 1241, horizontal plate part; 1242, vertical plate part; 13, arc extinguishing chamber; 14, magnetic shunt; 15, moving contact holder; 16, second main shaft; 17, bevel gear; 2, operation module; 20, operation module body; 21, operation handle; 22, first main shaft; 221, square shaft section; 222, round shaft section; 23, first clutch gear; 24, toothed disc; 3, motor; 31, power output shaft; 32, second clutch gear; 4, energy storage bumping assembly; 41, first mounting shaft; 42, movable plate; 43, long hole; 44, mounting groove; 45, spring; 46, stop block; 5, rotating disc assembly; 50, rotating disc support; 501, top plate; 502, bottom plate; 503, arc-shaped hole; 51, first rotating disc; 52, second rotating disc; 53, movable groove; 54, second mounting shaft; 55, limiting groove; 56, limiting block; 57, third mounting shaft; 6, indication assembly; 61, opening and closing button. DETAILED DESCRIPTION

[0040] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the devices or elements indicated to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In addition, the technical features involved in the different embodiments of the application described below can be combined with each other as long as there is no conflict.

[0044] Embodiment

[0045] The embodiment provides a two-in and two-out DC 1500V isolating switch, as shown in Figure 1 and 2 , which comprises two contact modules 1 and an operating module 2.

[0046] The two contact modules 1 are arranged side by side with the operating module 2, and the plurality of modules are assembled through fasteners, the contact module 1 comprises a contact module body 10 and a contact assembly arranged in the contact module body 10, the contact assembly comprises a moving contact 11 and a static contact 12, in the embodiment, the fastener is a pin or a rivet.

[0047] The contact module body 10 has a moving contact frame 15 rotating around the center thereof, the moving contact frame 15 has two moving contacts 11 arranged on both sides of the rotating center, and the static contact 12 and the arc extinguishing chamber 13 correspond to two, wherein the rotating angle of the moving contact frame 15 is 0-110°, so that the opening distance between the moving contact and the static contact is large, and the breaking capacity is improved, in the embodiment, the cross section of the contact module body 10 is square, so that the space is effectively utilized.

[0048] The static contact 12, as shown in Figure 4 , 7 and 8, has a first connecting plate 121 and a second connecting plate 122 which are connected in a bending mode and have opposite current directions, wherein the opening position of the moving contact 11 and the static contact 12 is between the first connecting plate 121 and the arc extinguishing chamber 13, and the second connecting plate 122 is located on the side of the first connecting plate 121 away from the arc extinguishing chamber 13, in the embodiment, the first connecting plate 121 and the second connecting plate 122 are bent in a U shape.

[0049] As shown in Figure 7As shown, the static contact 12 also has a first static contact plate 123 and a second static contact plate 124, the length of the second static contact plate 124 is longer than the length of the first static contact plate 123, the first static contact plate 123 is vertically arranged on one side of the first connecting plate 121, the second static contact plate 124 is L-shaped, the horizontal plate part 1241 of the L-shaped second static contact plate 124 is fixedly connected with the second connecting plate 122, a gap is arranged between the vertical plate part 1242 and the first static contact plate 123, and the plane where the vertical plate part 1242 is arranged is perpendicular to the plane where the first static contact plate 123 is arranged, the vertical plate part 1242 extends to the inside of the arc extinguishing chamber 13, and the magnetic enhancement sheet 14 is arranged between the horizontal plate part 1241 and the second connecting plate 122, thereby facilitating blowing the arc to the arc extinguishing chamber 13.

[0050] As shown, the moving contact 11 has two first moving contact plates 113 and two second moving contact plates 114 which are symmetrically arranged, the two first moving contact plates 113 are arranged between the two second moving contact plates 114, and the length of the second moving contact plate 114 is longer than the length of the first moving contact plate 113. Figures 4-6 As shown, the moving contact frame 15 rotates clockwise, the second moving contact plate 114 first contacts and communicates with the second static contact plate 124, and the first moving contact plate 113 then contacts and communicates with the first static contact plate 123; when the circuit breaker is opened, the second moving contact plate 114 first separates and disconnects from the second static contact plate 124, and the first moving contact plate 113 then separates and disconnects from the first static contact plate 123. Figure 4 In this embodiment, only the first moving contact plate 113 and the first static contact plate 123 are provided with contacts, and the above structure makes the arc only generated between the second moving contact plate 114 and the second static contact plate 124, and since the first moving contact plate 113 and the first static contact plate 123 are arranged away from the arc, the first moving contact plate 113 and the first static contact plate 123 are used as the main moving contact and the main static contact respectively, the contacts are not easy to be ablated by the arc, and the service life is prolonged.

[0051] As a convertible embodiment, the static contact 12 has a first static contact plate 123 and a second static contact plate 124, wherein when the circuit breaker is closed, the second static contact plate 124 first contacts and communicates with the moving contact 11, and when the circuit breaker is opened, the second static contact plate 124 separates and disconnects from the moving contact 11 later than the first static contact plate 123.

[0052] As a convertible embodiment, the movable contact 11 has a first movable contact plate 113 and a second movable contact plate 114, wherein, when closing, the second movable contact plate 114 is in contact with the static contact 12 prior to the first movable contact plate 113; when opening, the second movable contact plate 114 is separated from the static contact 12 after the first movable contact plate 113.

[0053] The operating module 2 includes an operating module body 20, a manual operating mechanism, an electric operating mechanism, and an indication assembly 6.

[0054] The operating module body 20 is provided with an operating handle 21 and a transmission mechanism, and the operating handle 21 drives the contact mechanism to open or close through the transmission mechanism.

[0055] The electric operating mechanism, as shown in Figure 9 has a motor 3, a power output shaft 31 provided at one end of the motor 3, and a second clutch gear 32 linked with the power output shaft 31, wherein the second clutch gear 32 has incomplete teeth, and the second clutch gear 32 has a first state of meshing connection with the first clutch gear 23 and a second state of disconnection.

[0056] The manual operating mechanism, as shown in Figure 10 includes an operating handle 21, a transmission mechanism, and an energy storage and jump assembly 4.

[0057] The transmission mechanism includes a first main shaft 22, a second main shaft 16, a gear transmission assembly, and a rotating disc assembly 5.

[0058] The first main shaft 22 is vertically arranged on the operating module body 20 and can be driven to rotate by the operating handle 21, as shown in Figure 14 the first main shaft 22 includes a square shaft section 221 and a round shaft section 222, the middle part of the first rotating disc 51 is formed with a square hole matched with the square shaft section 221, and the middle part of the second rotating disc 52 is formed with a round hole matched with the round shaft section 222; the second main shaft 16 is horizontally arranged on the contact module body 10, and the second main shaft 16 is provided with two movable contact frames 15. The first main shaft 22 is fixedly provided with a first clutch gear 23 linked therewith, and the first clutch gear 23 has incomplete teeth.

[0059] The gear transmission assembly is arranged between the first main shaft 22 and the second main shaft 16, and is adapted to convert the rotation of the first main shaft 22 into driving force for driving the second main shaft 16 to rotate, as shown in Figure 10As shown in the figure, the gear transmission assembly comprises a toothed disc 24 fixed on the first main shaft 22 and capable of rotating with the first main shaft 22, and a bevel gear 17 fixed on the second main shaft 16 and capable of rotating with the second main shaft 16, the bevel gear 17 being in meshing connection with the toothed disc 24. When the operating handle 21 is turned through 90°, the bevel gear 17 can rotate the contact mechanism through an angle greater than 90°, thereby realizing large stroke of the moving and static contacts and improving arc extinguishing capacity.

[0060] The rotating disc assembly 5 is provided with the second mounting shaft 54 and is capable of being driven to rotate by the first main shaft 22. As shown in the figure, Figures 11-14 As shown in the figure, the rotating disc assembly 5 comprises a first rotating disc 51 and a second rotating disc 52. The first rotating disc 51 is fixed on the first main shaft 22 and has two active grooves 53 or active holes symmetrically arranged on both sides of the rotating center of the first rotating disc 51 and a limiting groove 55 arranged between the two active grooves 53. The second rotating disc 52 is rotatably mounted on the first main shaft 22 and is provided with the second mounting shaft 54 capable of extending into the active groove 53 and capable of moving relative to the active groove 53. Before the energy storage and bumping assembly 4 moves to the limit compression position, one side wall of the active groove 53 of the first rotating disc 51 abuts against the second mounting shaft 54 and drives the second rotating disc 52 to rotate. After the energy storage and bumping assembly 4 moves to the limit compression position, the energy storage and bumping assembly 4 drives the second mounting shaft 54 to move from one side of the active groove 53 to the other side. The inventor ingeniously arranges the active groove 53 and the second mounting shaft 54, thereby realizing linkage and separation of the first rotating disc 51 and the second rotating disc 52, and having the advantages of simple structure and low production cost. Figure 12 As shown in the figure, the operating module body 20 is provided with a rotating disc support 50 comprising a top plate 501 and a bottom plate 502 arranged in a top-bottom manner, the top plate 501 and the bottom plate 502 are both provided with arc-shaped holes 503 for the second mounting shaft 54 to extend out of and move in, the top plate 501 and the bottom plate 502 are provided with two second rotating discs 52 arranged in a top-bottom manner, the two second rotating discs 52 are fixedly connected by two second mounting shafts 54 and two third mounting shafts 57 distributed in a circumferential direction, and the top plate 501 is provided with a limiting block 56 matched with the limiting groove 55.

[0061] The energy storage jump assembly 4 is disposed on the transmission mechanism and has an extreme compression position, an energy storage state before movement to the extreme compression position, and an energy release state after movement to the extreme compression position, which drives the transmission mechanism to rapidly operate. Before the energy storage jump assembly 4 moves to the extreme compression position, the turntable assembly 5 and the operating handle 21 remain in a linked state; after the energy storage jump assembly 4 moves to the extreme compression position, the turntable assembly 5 and the operating handle 21 remain separated. This ensures that the operating handle 21 remains in the same position during rapid operation of the energy storage jump assembly 4, preventing accidental injury to the operator's hands and improving safety.

[0062] The energy storage sudden jump component 4, such as Figures 15-17 As shown, it includes: a first mounting shaft 41, which is fixed on the operating module body 20; a second mounting shaft 54, which is installed on the operating module body 20 and is connected to the operating handle 21. The second mounting shaft 54 ​​is driven by the operating handle 21 and can move along a circular arc trajectory; a movable plate 42, one end of which is provided with a long hole 43 for the first mounting shaft 41 to pass through and allows the movable plate 42 to move laterally relative to the first mounting shaft 41, and the other end is provided with a mounting groove 44 or a mounting hole for the second mounting shaft 54 ​​to pass through and rotate in conjunction with it; a spring 45, which is sleeved on the movable plate 42, one end of which is against the first mounting shaft 41, and the other end is against the second mounting shaft 54 ​​or the stopper 46 formed at the end of the movable plate 42. When the second mounting shaft 54 ​​moves to the closest distance to the first mounting shaft 41, the spring 45 is in the extreme compression position.

[0063] It also includes an opening and closing button 61 for controlling the operation of the motor 3.

[0064] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A contact system for an isolating switch, characterized in that: include: A contact module body (10) is provided with a movable contact (11) and a stationary contact (12) capable of being connected or disconnected; A static contact (12) having a first connecting plate (121) and a second connecting plate (122) that are bent and connected and have opposite current directions, wherein the disconnected position of the moving contact (11) and the static contact (12) is between the first connecting plate (121) and the arc extinguishing chamber (13), and the second connecting plate (122) is located on a side of the first connecting plate (121) away from the arc extinguishing chamber (13); The static contact (12) has a first static contact plate (123) and a second static contact plate (124), wherein, when the switch is closed, the second static contact plate (124) contacts and communicates with the moving contact (11) before the first static contact plate (123); when the switch is opened, the second static contact plate (124) separates and disconnects from the moving contact (11) after the first static contact plate (123); The first static contact plate (123) is vertically arranged on one side of the first connecting plate (121); the second static contact plate (124) is L-shaped; the horizontal plate portion (1241) of the L-shaped second static contact plate (124) is fixedly connected to the second connecting plate (122); a gap is provided between the vertical plate portion (1242) and the first static contact plate (123); and a magnetizing plate (14) is fixed between the horizontal plate portion (1241) and the second connecting plate (122); The vertical plate portion (1242) extends into the interior of the arc extinguishing chamber (13); A manual operating mechanism comprising an operating handle (21), a transmission mechanism, and an energy storage jump assembly (4); The operating handle (21) drives the contact system to open or close via the transmission mechanism; An energy storage jump component (4) is arranged on the transmission mechanism and has an extreme compression position, an energy storage state before moving to the extreme compression position, and an energy release state after moving to the extreme compression position to drive the transmission mechanism to move quickly; before the energy storage jump component (4) moves to the extreme compression position, the turntable component (5) of the transmission mechanism and the operating handle (21) maintain a linkage state; after the energy storage jump component (4) moves to the extreme compression position, the turntable component (5) of the transmission mechanism and the operating handle (21) maintain a separation state.

2. The contact system of the disconnector according to claim 1, characterized in that: The first connecting plate (121) and the second connecting plate (122) are bent into a U shape.

3. The contact system of the disconnector according to claim 1, characterized in that: The moving contact (11) has a first moving contact plate (113) and a second moving contact plate (114), wherein, when the switch is closed, the second moving contact plate (114) contacts and connects with the static contact (12) before the first moving contact plate (113); when the switch is opened, the second moving contact plate (114) separates and disconnects from the static contact (12) after the first moving contact plate (113).

4. The contact system of the disconnector according to claim 3, characterized in that: The length of the second static contact plate (124) is longer than the length of the first static contact plate (123), the length of the second movable contact plate (114) is longer than the length of the first movable contact plate (113), and the second movable contact plate (114) can be in contact with or disconnected from the second static contact plate (124), and the first movable contact plate (113) can be in contact with or disconnected from the first static contact plate (123); Wherein, when the switch is closed, the second moving contact plate (114) contacts and communicates with the second static contact plate (124) before the first moving contact plate (113) contacts and communicates with the first static contact plate (123) afterwards; When the switch is opened, the second moving contact plate (114) is separated and disconnected from the second static contact plate (124) later, and the first moving contact plate (113) is separated and disconnected from the first static contact plate (123) first.

5. The contact system of the disconnector according to claim 1, characterized in that: The plane where the vertical plate portion (1242) is located is perpendicular to the plane where the first static contact plate (123) is located.

6. The contact system of the disconnector according to claim 1, characterized in that: A moving contact frame (15) is rotatably mounted in the contact module body (10), and the moving contact frame (15) has two moving contacts (11) arranged on both sides of its rotation center, and there are two corresponding static contacts (12) and arc extinguishing chambers (13), wherein the rotation angle of the moving contact frame (15) is 0-110°.

7. The contact system of the disconnector according to any one of claims 1 to 6, characterized in that: The cross section of the contact module body (10) is square.

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