CN203931982U - A kind of contact system of circuit breaker - Google Patents
A kind of contact system of circuit breaker Download PDFInfo
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- CN203931982U CN203931982U CN201420386894.8U CN201420386894U CN203931982U CN 203931982 U CN203931982 U CN 203931982U CN 201420386894 U CN201420386894 U CN 201420386894U CN 203931982 U CN203931982 U CN 203931982U
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- fixed contact
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Abstract
A kind of contact system of circuit breaker, comprise moving contact group (1) and fixed contact group (2), wherein, initiatively contact contact (111) and main fixed contact contact (211) are double-decker, initiatively contact working lining (1111) and main fixed contact working lining (2111) adopt the alloy material that contact resistance is low and its oxide resistor is stable, and initiatively contact conductive layer (1112) and main fixed contact conductive layer (2112) adopt the high material of conductance.Breaker contact system of the present utility model, can, under guarantee circuit breaker performance prerequisite, significantly reduce production costs, and is conducive to improve the competitiveness of product.
Description
Technical field
The utility model belongs to low voltage electrical apparatus technology field, particularly a kind of contact system of circuit breaker.
Background technology
In prior art, the contact system of common omnipotent breaker comprises moving contact group and fixed contact group, wherein the main fixed contact contact in active contact contact and the fixed contact group in moving contact group is overall structure, as shown in FIG. 10 and 11, in order to realize good contact performance, initiatively contact contact and main fixed contact contact adopt the silver alloy of price comparison costliness to make mostly, conventionally adopt silver-colored tungsten carbide 12 graphite 3 (AgWC12C3) such as active contact contact material adopts silver-colored tungsten 50 (AgW50), main fixed contact contact conventionally.Therefore, this contact system makes the manufacturing cost of circuit breaker high, is unfavorable for the market competition of product.
For this reason, in prior art, there is a kind of novel contact system, in order to reduce costs, this contact system mixes silver alloy (as AgWC12C3) simply with copper material, then using mixed mixture as the material of manufacturing active contact contact and main fixed contact contact.Although this contact system can reduce a part of cost, through properties of product, test is found, this contact system can not be brought into play well contact function after changing manufacture material, affects the original performance of product.
Utility model content
For this reason, technical problem to be solved in the utility model is that existing breaker contact system manufacturing cost is too high or contact performance is poor, and a kind of contact system of the circuit breaker that can ensure properties of product of both having saved production cost is provided.
For solving the problems of the technologies described above, the technical solution of the utility model is as follows:
A contact system for circuit breaker, comprises moving contact group and fixed contact group,
Described moving contact group comprises initiatively contact, arc moving contact and contact supporting, is provided with initiatively contact contact on described active contact; Described fixed contact group comprises main fixed contact, arc fixed contact and insulating base, is provided with main fixed contact contact on described main fixed contact; Described active contact contact and described main fixed contact contact cooperatively interact;
Described active contact contact comprises the active contact conductive layer that a side is connected with described active contact and the active contact working lining being connected with described active contact conductive layer opposite side; Described main fixed contact contact comprises the main fixed contact conductive layer that a side is connected with described main fixed contact and the main fixed contact working lining being connected with described main fixed contact conductive layer opposite side; Described active contact working lining and described main fixed contact working lining adopt the alloy material that contact resistance is low and its oxide resistor is stable, and described active contact conductive layer and described main fixed contact conductive layer adopt the high material of conductance.
In above-mentioned contact system, described active contact working lining is silver-nickel material, and described main fixed contact working lining is silver-colored Ni-graphite alloy material.
In above-mentioned contact system, described active contact working lining adopts AgNi30, and described main fixed contact working lining adopts AgNi30C3.
In above-mentioned contact system, the material of described active contact conductive layer, described main fixed contact conductive layer is identical with the material of described active contact, described main fixed contact.
In above-mentioned contact system, described active contact conductive layer, described main fixed contact conductive layer adopt red copper or its alloy.
In above-mentioned contact system, described active contact contact and described main fixed contact contact are all connected on described active contact and described main fixed contact by welding manner.
Technique scheme of the present utility model has the following advantages compared to existing technology:
(1) contact system of circuit breaker of the present utility model, wherein initiatively contact contact and main fixed contact contact are double-layer structure, and the material difference of this double-layer structure, initiatively contact working lining and main fixed contact working lining adopt the alloy material that contact resistance is low and its oxide resistor is stable, and initiatively contact conductive layer and main fixed contact conductive layer adopt the high material of conductance.This contact system, because moving contact conductive layer and main fixed contact conductive layer have adopted less expensive electric conducting material, therefore can significantly save the production cost of circuit breaker, solve the active fixed contact of prior art because all adopting expensive silver alloy to cause the high problem of cost, and the material adopting due to moving contact working lining and main fixed contact working lining again, make contact system can keep good performance, be conducive to improve the competitiveness of product.
(2) contact system of circuit breaker of the present utility model, wherein main fixed contact working lining preferably adopts the alloy material of silver-colored carbon compound and silver-colored tungsten, particularly AgNi30C3, its contact resistance is little, hardness is relatively low, and the resistance of its oxide, without obvious increase, is conducive to ensure the service behaviour of contact system.
(3) contact system of circuit breaker of the present utility model, wherein initiatively contact conductive layer, main fixed contact conductive layer adopt red copper, and IACS conductivity is good and cheap, is conducive to reduce production costs.
Brief description of the drawings
For content of the present utility model is more likely to be clearly understood, according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is the overall schematic of the utility model contact system;
Fig. 2 is the schematic diagram of moving contact group in the utility model contact system;
Fig. 3 is the schematic diagram of fixed contact group in the utility model contact system;
Fig. 4 is the schematic diagram of arc moving contact in the utility model contact system;
Fig. 5 is the schematic diagram of arc fixed contact in the utility model contact system;
Fig. 6 is the schematic diagram of active contact in the utility model contact system;
Fig. 7 is the schematic diagram of main fixed contact in the utility model contact system;
Fig. 8 is the schematic diagram of active contact contact in the utility model contact system;
Fig. 9 is the schematic diagram of main fixed contact contact in the utility model contact system;
Figure 10 is the initiatively schematic diagram of contact contact of contact system in prior art;
Figure 11 is the schematic diagram of the main fixed contact of contact system contact in prior art.
In figure, Reference numeral is expressed as:
1-moving contact group, 11-is contact initiatively, and 111-is contact contact initiatively, and 1111-is contact working lining initiatively, and 1112-is contact conductive layer initiatively, 12-arc moving contact;
2-fixed contact group, the main fixed contact of 21-, the main fixed contact of 211-contact, the main fixed contact working lining of 2111-, the main fixed contact conductive layer of 2112-, 22-arc fixed contact, 23-insulating base.
Embodiment
As shown in Figure 1, be the preferred embodiment of the utility model breaker contact system.
Described contact system comprises moving contact group 1 and fixed contact group 2, as shown in Figure 2, described moving contact group 1 comprises initiatively contact 11, arc moving contact 12 and contact supporting, and as shown in Figure 3, described fixed contact group 2 comprises main fixed contact 21, arc fixed contact 22 and insulating base 23.In described moving contact group 1 with described fixed contact group 2 is connected or when breaking current, due to described arc moving contact 12, the first connection of described arc fixed contact 22 and rear disjunction feature, electric arc is only at described arc moving contact 12, between described arc fixed contact 22, produce, at described active contact 11, on described main fixed contact 21, can not produce electric arc, thereby to described active contact 11, described main fixed contact 21 plays a protective role, described active contact 11, described main fixed contact 21 can be by electric scaling loss, described active contact 11, described main fixed contact 21 can play good conduction current effect.The concrete structure of described arc moving contact 12 and described arc fixed contact 22 as shown in Figures 4 and 5.
As shown in Figure 6, be provided with initiatively contact contact 111 on described active contact 11, described active contact contact 111 is connected on described active contact 11 by welding manner.As shown in Figure 7, on described main fixed contact 21, be provided with main fixed contact contact 211, described main fixed contact contact 211 is connected on described main fixed contact 21 by welding manner.Described active contact contact 111 cooperatively interacts with described main fixed contact contact 211.
As shown in Figure 8, described active contact contact 111 comprises the active contact conductive layer 1112 that a side is connected with described active contact 11 and the active contact working lining 1111 being connected with described active contact conductive layer 1112 opposite sides.As shown in Figure 9, described main fixed contact contact 211 comprises the main fixed contact conductive layer 2112 that a side is connected with described main fixed contact 21 and the main fixed contact working lining 2111 being connected with described main fixed contact conductive layer 2112 opposite sides.Due to connecting or when breaking current; arc energy consumption when described arc moving contact 12, described arc fixed contact 22 are born connection or breaking current; described active contact contact 111, described main fixed contact contact 211 respectively described active contact 11, described main fixed contact 21 shielded, therefore can be designed as by two parts and form.
Described active contact working lining 1111 and described main fixed contact working lining 2111 adopt the alloy material that contact resistance is low and its oxide resistor is stable, and described active contact conductive layer 1112 and described main fixed contact conductive layer 2112 adopt the material that conductance is high.Concrete, described active contact working lining 1111 is silver-nickel material, and described main fixed contact working lining 2111 is silver-colored Ni-graphite alloy material, and described active contact conductive layer 1112 and described main fixed contact conductive layer 2112 adopt red copper or its alloy.In the present embodiment, described active contact working lining 1111 adopts AgNi30, and described main fixed contact working lining 2111 adopts AgNi30C3; Described active contact conductive layer 1112 and described main fixed contact conductive layer 2112 adopt red copper.Wherein, the contact resistance of AgNi30 material is little, and the resistance of its oxide is without obvious increase; The contact resistance of AgNi30C3 material is little, and hardness is relatively low, and the resistance of its oxide is without obvious increase; The conductivity of red copper material is relatively better, and relative low price.
The material of described active contact conductive layer 1112, described main fixed contact conductive layer 2112 is identical with the material of described active contact 11, described main fixed contact 21.
In other embodiments, the other materials that initiatively contact working lining 1111 also can adopt in silver-nickel material family, main fixed contact working lining 2111 also can adopt the other materials in silver-colored Ni-graphite alloy material family, and initiatively contact conductive layer 1112 and main fixed contact conductive layer 2112 also can adopt red copper alloy material.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all execution modes.And among the protection range that the apparent variation of being extended out thus or variation are still created in the utility model.
Claims (6)
1. a contact system for circuit breaker, comprises moving contact group (1) and fixed contact group (2),
Described moving contact group (1) comprises initiatively contact (11), arc moving contact (12) and contact supporting, is provided with initiatively contact contact (111) on described active contact (11); Described fixed contact group (2) comprises main fixed contact (21), arc fixed contact (22) and insulating base (23), is provided with main fixed contact contact (211) on described main fixed contact (21); Described active contact contact (111) cooperatively interacts with described main fixed contact contact (211);
It is characterized in that: described active contact contact (111) comprises the active contact conductive layer (1112) that a side is connected with described active contact (11) and the active contact working lining (1111) being connected with described active contact conductive layer (1112) opposite side; Described main fixed contact contact (211) comprises the main fixed contact conductive layer (2112) that a side is connected with described main fixed contact (21) and the main fixed contact working lining (2111) being connected with described main fixed contact conductive layer (2112) opposite side; Described active contact working lining (1111) and described main fixed contact working lining (2111) adopt the alloy material that contact resistance is low and its oxide resistor is stable, and described active contact conductive layer (1112) and described main fixed contact conductive layer (2112) adopt the high material of conductance.
2. contact system according to claim 1, is characterized in that: described active contact working lining (1111) is silver-nickel material, and described main fixed contact working lining (2111) is silver-colored Ni-graphite alloy material.
3. contact system according to claim 2, is characterized in that: described active contact working lining (1111) adopts AgNi30, and described main fixed contact working lining (2111) adopts AgNi30C3.
4. contact system according to claim 3, is characterized in that: the material of described active contact conductive layer (1112), described main fixed contact conductive layer (2112) is identical with the material of described active contact (11), described main fixed contact (21).
5. according to the arbitrary described contact system of claim 1-4, it is characterized in that: described active contact conductive layer (1112), described main fixed contact conductive layer (2112) adopt red copper or its alloy.
6. contact system according to claim 5, is characterized in that: described active contact contact (111) and described main fixed contact contact (211) are all connected on described active contact (11) and described main fixed contact (21) by welding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420386894.8U CN203931982U (en) | 2014-07-14 | 2014-07-14 | A kind of contact system of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420386894.8U CN203931982U (en) | 2014-07-14 | 2014-07-14 | A kind of contact system of circuit breaker |
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| Publication Number | Publication Date |
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| CN203931982U true CN203931982U (en) | 2014-11-05 |
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| CN201420386894.8U Active CN203931982U (en) | 2014-07-14 | 2014-07-14 | A kind of contact system of circuit breaker |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505270A (en) * | 2015-01-08 | 2015-04-08 | 德力西电气有限公司 | Fixed contact of disconnector |
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2014
- 2014-07-14 CN CN201420386894.8U patent/CN203931982U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505270A (en) * | 2015-01-08 | 2015-04-08 | 德力西电气有限公司 | Fixed contact of disconnector |
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