Isolation shell, contact system and contactor
By setting isolation structures on the base and housing of the contactor, the problem of poor phase-to-phase insulation performance of the contactor is solved, achieving higher insulation performance and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-03-31
AI Technical Summary
Existing contactors have poor phase-to-phase insulation performance and lack effective auxiliary structures, leading to current leakage and safety hazards.
Appropriate isolation structures are provided on the base and housing of the contactor, including base isolation structure and housing isolation structure, to enhance the phase-to-phase insulation performance by providing double protection to isolate adjacent stationary contacts.
It improves the phase-to-phase insulation performance of the contactor, ensuring its stability and safety, and preventing accidents such as current leakage and electrical fires.
Smart Images
Figure CN224067621U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to low voltage electrical apparatus technical field especially relates to a separation casing, contact system and contactor. BACKGROUND
[0002] The contactor is a kind of switch electrical apparatus using electromagnetic, pneumatic or hydraulic principle, and the main circuit is realized by control circuit to be on-off.The contactor has the advantages of strong breaking current, rapid action, safe operation, frequent operation and remote control.
[0003] Good interphase insulation performance is the key to the normal work of contactor and the safe and stable operation of electrical system.If interphase insulation performance is poor, current leakage, short circuit and even serious consequences such as electrical fire are easily caused.In prior art, only isolation structure is usually arranged on the base of contact system, lacks other auxiliary structures, protection is insufficient, still cannot meet the insulation requirement, and overall interphase insulation performance is poor.
[0004] Therefore, it is urgent to provide a separation casing, contact system and contactor to improve interphase insulation performance, so as to ensure the stability and safety of contactor. UTILITY MODEL CONTENT
[0005] The utility model aims at providing a separation casing, contact system and contactor to improve interphase insulation performance, so as to ensure the stability and safety of contactor.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] The utility model provides a separation casing, which comprises:
[0008] Base, the base is equipped with base isolation structure, and the base isolation structure is used to be arranged between adjacent two static contact pieces;
[0009] Cover, the cover is equipped with cover isolation structure on the inner side, the cover isolation structure and the base isolation structure are set one by one, the cover is covered on the base, and the cover isolation structure and the base isolation structure are connected, to isolate adjacent two static contact pieces.
[0010] As an optional technical solution of the separation casing, the base isolation structure comprises first isolation rib, and the first isolation rib is equipped with slot;
[0011] The cover isolation structure comprises second isolation rib, and the second isolation rib is at least partially inserted into the slot of the first isolation rib.
[0012] As an optional technical scheme of the isolation shell, a bottom surface of the slot is a stepped surface, and a shape of the second isolation rib matches the shape of the slot.
[0013] As an optional technical scheme of the isolation shell, the base isolation structure comprises a third isolation rib, and a first lap plate is arranged on the third isolation rib.
[0014] The cover shell isolation structure comprises a fourth isolation rib, and a second lap plate is arranged on the fourth isolation rib, and the second lap plate is lapped on the first lap plate.
[0015] As an optional technical scheme of the isolation shell, a lap surface and a limiting surface are arranged on the first lap plate, the limiting surface intersects with the lap surface to form an included angle, and the second lap plate is lapped on the lap surface and the end portion is abutted on the limiting surface.
[0016] As an optional technical scheme of the isolation shell, one of the cover shell and the base is provided with a clamping hole, and the other is provided with a protrusion matched with the clamping hole, and the cover shell and the base are clamped and matched through the clamping hole and the protrusion.
[0017] The utility model provides a kind of contact system, which comprises a static contact sheet and the isolation shell described above.
[0018] As an optional technical scheme of the contact system, a positioning groove is arranged on the base, the middle part of the static contact sheet is inserted into the positioning groove, and a first boss is arranged on the side surface of the wiring end of the static contact sheet.
[0019] A first shoulder, a second shoulder and a third shoulder are arranged in the base, the first shoulder and the second shoulder are used to clamp the wiring end from the top and bottom directions, and the third shoulder is used to abut against the first boss.
[0020] As an optional technical scheme of the contact system, a positioning groove is arranged on the base, the middle part of the static contact sheet is inserted into the positioning groove, a second boss is arranged on the side surface of the wiring end of the static contact sheet, a side insertion port is arranged in the base, and the second boss is partially inserted into the side insertion port.
[0021] The utility model provides a kind of contactor, which comprises the contact system described above.
[0022] Beneficial effects:
[0023] The utility model provides a kind of isolation shell, the isolation shell includes pedestal and cover, pedestal is equipped with pedestal isolation structure, pedestal isolation structure is used to set between two adjacent static contact piece;Cover inside is protruding with cover isolation structure, cover isolation structure and pedestal isolation structure one-to-one corresponding arrangement, cover is covered in pedestal, cover isolation structure and pedestal isolation structure butt joint, to cooperatively isolate two adjacent static contact piece.The pedestal isolation structure is set on pedestal, and the cover isolation structure is set on cover, when cover is covered in pedestal, cover isolation structure and pedestal isolation structure cooperatively, can realize double protection, isolate two adjacent static contact piece, improve interphase insulation performance, to ensure the stability and security of contactor.
[0024] The utility model provides a kind of contact system, the contact system includes static contact piece and above-mentioned isolation shell, by being provided with the contact system with above-mentioned isolation shell, can have better interphase insulation performance.
[0025] The utility model provides a kind of contactor, the contactor includes above-mentioned contact system, by being provided with above-mentioned contact system, can guarantee the stability and security of contactor. DRAWINGS
[0026] Figure 1 It is the structure schematic view of the isolation shell provided in the utility model embodiment one;
[0027] Figure 2 It is the sectional view of cover and pedestal provided in the utility model embodiment one;
[0028] Figure 3 It is the structure schematic view of pedestal provided in the utility model embodiment one;
[0029] Figure 4 It is the sectional view of isolation shell provided in the utility model embodiment one;
[0030] Figure 5 It is Figure 4 The local enlarged view of B in;
[0031] Figure 6 It is the structure schematic view of static contact piece provided in the utility model embodiment one;
[0032] Figure 7 It is Figure 3 The local enlarged view of A in;
[0033] Figure 8 It is the structure schematic view of static contact piece and pedestal provided in the utility model embodiment one;
[0034] Figure 9 It is the structure schematic view of the isolation shell provided in the utility model embodiment two;
[0035] Figure 10 is a structure schematic view of the shell provided by the embodiment two of the utility model;
[0036] Figure 11 is a structure schematic view of the base provided by the embodiment two of the utility model;
[0037] Figure 12 is a sectional view of the isolation shell provided by the embodiment two of the utility model;
[0038] Figure 13 is Figure 12 the partial close-up view of D in it;
[0039] Figure 14 is a structure schematic view of the static contact provided by the embodiment two of the utility model;
[0040] Figure 15 is Figure 11 the partial close-up view of C in it;
[0041] Figure 16 is a structure schematic view of the static contact and the base provided by the embodiment two of the utility model;
[0042] Figure 17 is a structure schematic view of the isolation shell provided by the embodiment three of the utility model;
[0043] Figure 18 is a split view of the isolation shell provided by the embodiment three of the utility model;
[0044] Figure 19 is Figure 18 the partial close-up view of E in it;
[0045] Figure 20 is Figure 18 the partial close-up view of F in it.
[0046] in the figure:
[0047] 10, base; 11, base isolation structure; 1111, slot; 112, first lap plate; 1121, lap surface; 1122, limiting surface; 12, protrusion; 13, positioning slot; 141, first shoulder; 142, second shoulder; 143, third shoulder; 144, side spigot;
[0048] 20, shell; 21, shell isolation structure; 212, second lap plate; 22, clamping hole;
[0049] 30, static contact; 30a, first static contact; 30b, second static contact; 31, positioning protrusion; 32, first boss; 33, second boss. DETAILED DESCRIPTION
[0050] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0051] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0052] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0053] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0054] Example 1
[0055] like Figures 1 to 6 As shown, this embodiment provides an isolation housing, which includes a base 10 and a cover 20. The base 10 is provided with a base isolation structure 11, which is used to be disposed between two adjacent stationary contact pieces 30. The cover 20 is provided with a cover isolation structure 21 protruding from its inner side. The cover isolation structure 21 is disposed in a one-to-one correspondence with the base isolation structure 11. The cover 20 covers the base 10, and the cover isolation structure 21 and the base isolation structure 11 are connected to each other to cooperate in isolating the two adjacent stationary contact pieces 30.
[0056] By setting the base isolation structure 11 on the base 10 and the cover isolation structure 21 on the cover 20, when the cover 20 covers the base 10, the cover isolation structure 21 and the base isolation structure 11 cooperate to achieve double protection, isolate the two adjacent static contact pieces 30, improve the insulation performance between phases, and thus ensure the stability and safety of the contactor.
[0057] In the embodiment, two base isolation structures 11 are spaced apart. Specifically, the base isolation structure 11 includes a first isolation rib, and the first isolation rib is provided with a slot 1111; the cover isolation structure 21 includes a second isolation rib, and the second isolation rib is at least partially and slidingly inserted into the slot 1111 of the first isolation rib. By providing the slot 1111 on the first isolation rib, when the cover 20 covers the base 10, the second isolation rib is slidingly inserted into the slot 1111, so that the base 10 and the cover 20 are tightly butted and cooperate to achieve insulation between phases, and the structure is simple and occupies less space.
[0058] Referring to Figure 4 and Figure 5 In the embodiment, the end cross section of the first isolation rib is in a U shape, the end cross section of the second isolation rib is in a T shape, and the second isolation rib is partially inserted into the slot 1111 of the first isolation rib; the outer side of the base 10 is provided with a hook, and the inner side of the cover 20 is provided with a slot, and when the cover 20 covers the base 10, the base 10 is fixed by the hook and the slot of the cover 20. It can be understood that the fixing mode between the base 10 and the cover 20 can be designed according to the prior art.
[0059] Referring to Figure 2 Optionally, the bottom surface of the slot 1111 is a stepped surface, and the shape of the second isolation rib matches the shape of the slot 1111. By setting the bottom surface of the slot 1111 as a stepped surface and setting the shape of the second isolation rib to match the shape of the slot 1111, the second isolation rib can cooperate with the stepped surface; by setting the stepped surface structure, the irregular structure is increased, which can effectively prolong the path of arc along the surface, meet the requirement of higher creepage distance, and further improve the insulation performance.
[0060] Referring to Figure 6 and Figure 7 The embodiment also provides a contact system, which includes the static contact piece 30 and the above-mentioned isolation shell. The base 10 is provided with a positioning slot 13, the middle part of the static contact piece 30 is inserted into the positioning slot 13, and the wiring end side of the static contact piece 30 is provided with a first boss 32; the base 10 is provided with a first shoulder 141, a second shoulder 142 and a third shoulder 143, the first shoulder 141 and the second shoulder 142 are used to clamp the wiring end from the top and bottom directions, and the third shoulder 143 is used to abut against the first boss 32.
[0061] In the prior art, the contact silver point is located on the surface of the static contact piece and used to cooperate with the moving contact to realize the closing and opening of the circuit; the base can only be positioned at the wiring end of the static contact piece, and since the wiring end is far away from the position of the contact silver point, the wiring end of the static contact piece is prone to position deviation, which affects the contact stability of the contact.
[0062] In the embodiment, the middle part of the static contact piece 30 is inserted into the positioning groove 13 of the base 10, so that the base 10 can position the middle part of the static contact piece 30, and the first shoulder 141, the second shoulder 142 and the third shoulder 143 are arranged on the base 10, thereby playing a positioning role on the wiring end of the static contact piece 30, enabling the static contact piece 30 to be balanced in force, reducing position deviation, preventing the static contact piece 30 from being twisted during wiring, and ensuring the contact stability of the contact.
[0063] Referring to Figure 6 , specifically, in the embodiment, the static contact piece 30 is a first static contact piece 30a, and the first static contact piece 30a is in the shape of Z as a whole; correspondingly, the setting height of the positioning groove 13 is higher than the setting height of the first shoulder 141, the second shoulder 142 and the third shoulder 143.
[0064] Optionally, the middle part of the first static contact piece 30a is provided with a positioning protrusion 31, and the positioning protrusion 31 is inserted into the positioning groove 13 and is in interference fit with the groove wall of the positioning groove 13. By arranging the positioning protrusion 31 on the first static contact piece 30a, the positioning protrusion 31 is in interference fit with the positioning groove 13, so as to ensure that the first static contact piece 30a is positioned firmly and stably.
[0065] In the embodiment, the cross section of the positioning protrusion 31 is in the shape of a trapezoid; the positioning protrusion 31 has a positioning plane and a guide inclined surface, the guide inclined surface and the positioning plane intersect at an angle, and the guide inclined surface is located on the side of the positioning plane away from the wiring end. By arranging the positioning protrusion 31 in the shape of a trapezoid in cross section, it is convenient to install the first static contact piece 30a on the base 10, thereby improving the assembly efficiency.
[0066] Referring to Figure 7 and Figure 8 , during installation, the middle part of the first static contact piece 30a is inserted into the positioning groove 13, and at the same time, the wiring end of the first static contact piece 30a is moved between the first shoulder 141 and the second shoulder 142, and the first shoulder 141 and the second shoulder 142 clamp and position the wiring end from the top and bottom directions; when the first boss 32 of the first static contact piece 30a abuts against the third shoulder 143, at this time, the positioning protrusion 31 is located in the positioning groove 13 and is in close fit with the groove wall of the positioning groove 13 through the positioning plane, and the first static contact piece 30a is positioned firmly.
[0067] The embodiment also provides a contactor comprising the above contact system. By arranging the above contact system, the stability and safety of the contactor can be ensured.
[0068] Embodiment Two
[0069] As Figures 9 to 16 shown, embodiment two also provides an isolation shell, compared with embodiment one, three base isolation structures 11 are arranged in embodiment two, and the specific structure of the cover isolation structure 21 of the isolation shell and the abutting position of the base isolation structure 11 is different. Specifically, the base isolation structure 11 comprises a third isolation rib, and a first lap plate 112 is arranged on the third isolation rib; the cover isolation structure 21 comprises a fourth isolation rib, and a second lap plate 212 is arranged on the fourth isolation rib, and the second lap plate 212 is lapped on the first lap plate 112. By arranging the corresponding lap plates on the third isolation rib and the fourth isolation rib, when the cover 20 is covered outside the base 10, the first lap plate 112 of the third isolation rib can be lapped and matched with the second lap plate 212 on the fourth isolation rib to realize the insulation between phases.
[0070] Optionally, the first lap plate 112 is provided with a lapping surface 1121 and a limiting surface 1122, the limiting surface 1122 and the lapping surface 1121 intersect at an angle, and the second lap plate 212 is lapped on the lapping surface 1121 and the end portion is abutted on the limiting surface 1122. By arranging the lapping surface 1121 and the limiting surface 1122 on the first lap plate 112, when the first lap plate 112 and the second lap plate 212 are matched, the limiting surface 1122 can play a limiting role, and the limiting surface 1122 can also block the small gap between the first lap plate 112 and the second lap plate 212, so as to better guarantee the insulation performance between phases of the isolation shell.
[0071] In the embodiment, the lapping surface 1121 and the limiting surface 1122 are both planes; the lapping surface 1121 and the limiting surface 1122 are perpendicular to each other. In other embodiments, the lapping surface 1121 and the limiting surface 1122 can also be considered to be inclined surfaces.
[0072] Referring to Figure 12 and Figure 13 In the embodiment, the end portion of the first lap plate 112 of the third isolation rib is in L-shaped cross section, the end portion of the second lap plate 212 of the fourth isolation rib is also in L-shaped cross section; the first lap plate 112 is lapped with the second lap plate 212, and the end portions are abutted with each other.
[0073] The embodiment also provides a contact system, which comprises the static contact piece 30 and the above-mentioned isolation shell. The base 10 is provided with a positioning groove 13, the middle part of the static contact piece 30 is inserted into the positioning groove 13, the side surface of the wiring end of the static contact piece 30 is provided with a second boss 33, and the base 10 is provided with a side insertion opening 144, and part of the second boss 33 is inserted into the side insertion opening 144.
[0074] The middle part of the static contact 30 is inserted into the positioning groove 13 of the base 10, the base 10 can position the middle part of the static contact 30, and the side socket 144 is arranged on the base 10, thereby playing a positioning role on the wiring end of the static contact 30, the static contact 30 can be balanced, the position deviation is reduced, the static contact 30 is prevented from being twisted during wiring, and the contact contact stability is ensured.
[0075] Referring to Figure 14 , specifically, in the embodiment, the static contact 30 is a second static contact 30b, and the second static contact 30b is in a Z shape as a whole; correspondingly, the setting height of the positioning groove 13 is higher than that of the side socket 144.
[0076] In the embodiment, the middle part of the second static contact 30b is provided with a positioning protrusion 31, the positioning protrusion 31 is inserted into the positioning groove 13 and is in interference fit with the groove wall of the positioning groove 13. By arranging the positioning protrusion 31 on the second static contact 30b, the positioning protrusion 31 is in interference fit with the positioning groove 13, so that the positioning of the second static contact 30b is firm and stable. The positioning protrusion 31 in the embodiment is the same design as that in the first embodiment.
[0077] Referring to Figure 15 and Figure 16 , during installation, the middle part of the second static contact 30b is inserted into the positioning groove 13, and at the same time, the wiring end of the second static contact 30b is moved to the position of the side socket 144, when the second protrusion 33 is inserted into the side socket 144, the side socket 144 can clamp and position the wiring end from the top and bottom directions and limit the wiring end from the side, and the first static contact 30a is firmly positioned.
[0078] It can be understood that the first static contact 30a in the first embodiment and the second static contact 30b in the second embodiment have differences in shape and size, and therefore the structures of the base 10 in the first embodiment and the second embodiment are also different, so that the static contacts 30 of different shapes and sizes can be limited. In other embodiments, the structure of the base 10 can be adaptively adjusted according to the specific shape and size of the static contact 30.
[0079] Embodiment three
[0080] As Figures 17 to 20 shown, the third embodiment also provides an isolation shell, which also includes a base 10 and a cover 20, one of the base 10 and the cover 20 is provided with a clamping hole 22, and the other is provided with a protrusion 12 matched with the clamping hole 22, and the cover 20 and the base 10 are clamped and matched through the clamping hole 22 and the protrusion 12. By arranging the matched clamping hole 22 and the protrusion 12, the position stability of the cover 20 can be further ensured, and the interphase insulation reliability is ensured.
[0081] In the embodiment, the base 10 is provided with the protrusion 12, and the cover 20 is provided with the clamping hole 22; the protrusion 12 is arranged at the middle position of the side surface of the base 10, and the arrangement position of the clamping hole 22 matches the arrangement position of the protrusion 12; the protrusion 12 is located at the bottom end of the base 10, when the cover 20 is covered on the outside of the base 10, the base 10 is gradually moved to the inside of the cover 20, until the cover 20 and the base 10 are clamped and matched through the clamping hole 22 and the protrusion 12, so that the cover 20 and the base 10 are relatively fixed. Wherein, the clamping hole 22 and the protrusion 12 can be correspondingly arranged with multiple positions.
[0082] In the above embodiment one and embodiment two, the cover 20 and the base 10 are cooperatively matched to realize the phase-to-phase insulation, the cover isolation structure 21 and the base isolation structure 11 form a coupling structure (such as the U-shaped and T-shaped coupling in the embodiment one, and the double L-shaped coupling in the embodiment three), which can not only play the insulation function and meet the higher creepage distance requirement, but also effectively reduce the volume of the isolation shell; the positioning groove 13 is arranged on the base 10 to position the middle part of the static contact 30, and the corresponding structure is arranged to position the wiring end of the static contact 30, so as to minimize the swing of the static contact 30, balance the force, and improve the contact stability; the protrusion 12 and the clamping hole 22 are clamped and matched in the embodiment three, which further guarantees the position stability of the cover 20 and guarantees the reliability of the phase-to-phase insulation; the contact has better phase-to-phase insulation performance, better overall quality, higher use stability and safety.
[0083] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the implementation mode of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be carried out without departing from the protection scope of the utility model. Here, it is unnecessary and impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made in the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. An isolated housing, characterized in that, The application relates to a contact system. The base (10) is provided with base isolation structures (11) arranged between two adjacent static contact pieces (30); the cover (20) is provided with cover isolation structures (21) corresponding to the base isolation structures (11) and arranged outside the base (10); the cover isolation structures (21) and the base isolation structures (11) are connected to isolate the two adjacent static contact pieces (30). The base isolation structure (11) comprises a first isolation rib provided with a slot (1111).
2. The isolation enclosure of claim 1, wherein, The cover isolation structure (21) comprises a second isolation rib at least partially inserted into the slot (1111) of the first isolation rib. The bottom surface of the slot (1111) is a stepped surface, and the shape of the second isolation rib matches that of the slot (1111).
3. The isolation enclosure of claim 2, wherein, The base isolation structure (11) comprises a third isolation rib provided with a first lap plate (112).
4. The isolation enclosure of claim 1, wherein, The cover isolation structure (21) comprises a fourth isolation rib provided with a second lap plate (212) lapped on the first lap plate (112). The first lap plate (112) is provided with a lapping surface (1121) and a limiting surface (1122) intersecting the lapping surface (1121) at an angle, and the second lap plate (212) is lapped on the lapping surface (1121) and the end portion is abutted on the limiting surface (1122).
5. The isolation enclosure of claim 4, wherein, One of the cover (20) and the base (10) is provided with a clamping hole (22), and the other is provided with a protrusion (12) matched with the clamping hole (22), and the cover (20) and the base (10) are clamped and matched through the clamping hole (22) and the protrusion (12).
6. The isolation enclosure of claim 1, wherein, The application relates to a contact system comprising a static contact piece (30) and the isolation shell as claimed in any one of claims 1-6.
7. Contact system, characterized in that The base (10) is provided with a positioning groove (13), the middle part of the static contact piece (30) is inserted into the positioning groove (13), and the side surface of the wiring end of the static contact piece (30) is provided with a first boss (32).
8. The contact system of claim 7, wherein, The base (10) is provided with a first shoulder (141), a second shoulder (142) and a third shoulder (143), the first shoulder (141) and the second shoulder (142) are used for clamping the wiring end from the top and bottom directions, and the third shoulder (143) is used for abutting against the first boss (32). The base (10) is provided with a positioning groove (13), the middle part of the static contact piece (30) is inserted into the positioning groove (13), and the side surface of the wiring end of the static contact piece (30) is provided with a second boss (33), and the base (10) is provided with a side insertion opening (144), and the second boss (33) is partially inserted into the side insertion opening (144).
9. The contact system of claim 7, wherein, The application relates to a contact system comprising the contact system as claimed in any one of claims 7-9.
10. A contactor characterized by,