CN207474324U - A kind of large capacity combined load ratio bridging switch - Google Patents
A kind of large capacity combined load ratio bridging switch Download PDFInfo
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- CN207474324U CN207474324U CN201721527975.5U CN201721527975U CN207474324U CN 207474324 U CN207474324 U CN 207474324U CN 201721527975 U CN201721527975 U CN 201721527975U CN 207474324 U CN207474324 U CN 207474324U
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- electric arc
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Abstract
The utility model is related to a kind of large capacity combined load ratio bridging switch, for the main arc contact of the switch with transition contact using clip type structure, the main arc contact forms monoblock type structure of contact terminal by current carrying contact and arc contact；The main arc contact includes stent, carried flow contact blade, electric arc moving contact piece, pin and spring, the middle part of the carried flow contact blade and electric arc moving contact piece is longitudinally equipped with long stripes through hole, the pin limits multiple carried flow contact blades and electric arc moving contact piece in stent through stent two side and multiple long stripes through holes, one end of the pin is additionally provided with bayonet lock, spring is additionally provided between multiple carried flow contact blades, multiple electric arc moving contact pieces and stent so that multiple carried flow contact blades, multiple electric arc moving contact pieces and fixed contact offset.The utility model have the characteristics that structure of contact terminal it is simple, it is easier for installation, using relatively reliable.
Description
Technical field
The utility model belongs to sub-connecting switch of transformer field more particularly to a kind of large capacity combined type loaded tap-off is opened
It closes.
Background technology
Low capacity combined load ratio bridging switch majority is mating for low capacity distribution transformer at present, for output voltage
It adjusts.Since rural power grid distribution line is long, in addition idle deficiency, distribution line terminal voltage is generally relatively low.It is deposited to solve rural power grids
In this problem, be typically employed at distribution line 2/3 add feeder line distribution transformer or substation's setting pressure-adjusting type without
Work(compensation capacitor.Feeder line distribution transformer and voltage regulating imaginary power compensation all use self-coupling formula transformer.Although self coupling tune
Pressure type transformer electromagnetic capacity is smaller, but transmission power is larger, and what this just needed the double resistor transitions of large capacity combined type has load point
Connect switch.In addition, electrochemical work is also required to such load ratio bridging switch with electric smelting transformer.
In view of low capacity combined load ratio bridging switch contact current capacity is insufficient, it is forced to increase using contact parallel connection thus
Great current carrying capacity.Such as 200A combined load ratio bridging switchs, to reach 400A current capacities.200A contacts is just needed to be made as
It is two layers, then used in parallel.Thus being likely due to electric current distribution unevenness causes some contact current-carrying excessive, causes a certain touch
Head overheat operation, causes to be unfavorable for the safe operation of power grid.To make contact uniform divided flows in parallel, transformer winding needs are taken strong
The measure of shunting is made, increases transformer manufacturing cost.Therefore, with the demand of 10~35kV power network developments, large capacity is needed
The combined load ratio bridging switch of 400A.
Invention content
In order to solve the technical issues of above-mentioned, the purpose of this utility model be to provide it is a kind of it is simple in structure, easy for installation, make
With reliable large capacity combined load ratio bridging switch.
To achieve these goals, the utility model employs following technical solution：
A kind of large capacity combined load ratio bridging switch, including motor, quick mechanism, insulating cylinder, insulation spindle and contact
System, the contact system include the moving contact being mounted on insulation spindle and the fixed contact on insulating cylinder；It is described dynamic
Contact is three-phase, and a main arc contact and two transition contacts are included per phase moving contact, and the main arc contact is passed through with transition contact
It is electrically connected by a transition resistance, forms the combined load ratio bridging switch of double resistor transitions；It is characterized in that：The minor arc touches
For head with transition contact using clip type structure, the main arc contact forms monoblock type contact knot by current carrying contact and arc contact
Structure；The main arc contact include stent, carried flow contact blade, electric arc moving contact piece, pin and spring, the carried flow contact blade with
The middle part of electric arc moving contact piece is longitudinally equipped with long stripes through hole, and the pin runs through stent two side and multiple long stripes through holes
Multiple carried flow contact blades and electric arc moving contact piece are limited in stent, one end of the pin is additionally provided with bayonet lock, multiple current-carrying
Spring is additionally provided between moving contact piece, multiple electric arc moving contact pieces and stent so that multiple carried flow contact blades, multiple electric arcs move
Contact blade offsets with fixed contact.
Preferably：Multiple rivets are additionally provided with multiple corresponding positions of moving contact piece on the stent, it is described
One end of spring is set on rivet.
Preferably：Washer is equipped between the moving contact piece and stent, between adjacent moving contact piece so that all
It is held in fixed contact to moving contact piece energy freedom and flexibility.
Preferably：The transition contact refers to the copper-tungsten electric arc of clip type two-point contact mode using wide formula list
The end of contact and transition contact is arranged with main arc contact into camber line.
Preferably：The electric arc moving contact piece is located at the both sides of carried flow contact blade, the carried flow contact blade
It is inlaid with for against corrosion using four point contacts, two outside of electric arc moving contact piece front end and the both sides of fixed contact with fixed contact
The copper-tungsten block of electrical arc erosion.Since this combined load ratio bridging switch is designed by step voltage 900V, load current 400A,
Contact switching capacity is larger, and in order to ensure electric arc reliably extinguishes, contact program fracture is opened away from design than general load ratio bridging switch
Corresponding increase, meanwhile, copper tungsten contact tungstenic amount increases to 80%, reduces the scaling loss amount of contact.Since load ratio bridging switch is setting
The pressure regulation in high-voltage winding, present current potential is high, and the dielectric strength for supporting pressure regulation moving contact insulating support is more demanding, insulation knot
Structure design is more corresponding than low pressure pressure regulation complicated.
The moving contact of the utility model (contains current carrying contact 4 using clip type, whole main arc contact using 8 point contact arranged side by side
4 points of point and arc contact) and inlay the structure design of copper-tungsten, it is ensured that good conductive contact, 1 avoids original two layers
A certain contact overheating defect caused by contact parallel connection.It is big thus to solve contact current-carrying, warm liter is low, anti-short circuit capability is strong, are-tight
Ablation and the problem of long lifespan, have the characteristics that structure of contact terminal it is simple, it is easier for installation, using relatively reliable.
Description of the drawings
Fig. 1 is the structure diagram of the present invention.
Fig. 2 is the A-A sectional views of the main arc contact of the present invention.
Fig. 3 is the operating diagram of the moving contact piece of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
A kind of large capacity combined load ratio bridging switch as shown in Figure 1, Figure 2 and Figure 3, including motor, quick mechanism, absolutely
Edge cylinder, insulation spindle and contact system, the contact system include the moving contact being mounted on insulation spindle 2 and mounted on exhausted
Fixed contact 5 on edge cylinder 1；The moving contact is three-phase, includes a main arc contact 4 and two transition contacts 3 per phase moving contact,
The main arc contact 4 is electrically connected with transition contact 3 via a transition resistance, forms the combined type loaded tap-off of double resistor transitions
Switch；Main arc contact 4 and two 3 moving contacts of transition contact are same layer arrangement, and on same contact head insulated stent；It is described
Fixed contact is mounted on grease chamber insulating cylinder inner wall；The fixed contact includes be coupled contact of the input fixed contact with output, load electricity
Input fixed contact, main arc contact, output conducting ring are flowed through, is finally exported by the connection contact exported.When for transformer Y connects
When, the connection contact of three-phase output is carried out electric link.
The main arc contact 4 is with transition contact 3 using clip type structure, and the main arc contact 4 is by current carrying contact and electricity
Arcing contact forms monoblock type structure of contact terminal；The main arc contact 4 includes stent 41, carried flow contact blade 48, electric arc moving contact piece
43rd, pin 44 and spring 47, the middle part of the carried flow contact blade 48 and electric arc moving contact piece 43 are longitudinally equipped with long stripes through hole,
The pin 44 runs through 41 two side of stent and multiple long stripes through holes by multiple carried flow contact blades 48 and electric arc moving contact piece
In stent 41, one end of the pin 44 is additionally provided with bayonet lock, multiple carried flow contact blades 48, multiple electric arc moving contact pieces for 43 limitings
Spring 47 is additionally provided between 43 and stent 41 so that multiple carried flow contact blades 48, multiple electric arc moving contact pieces 43 and fixed contact
5 offset.
Multiple rivets 42 are additionally provided with multiple 43 corresponding positions of moving contact piece on the stent 41, the spring 47
One end is set on rivet 42.Washer 46 is equipped between the moving contact piece 43 and stent, between adjacent moving contact piece 43.Institute
It states transition contact 3 and the copper-tungsten arc contact of clip type two-point contact mode and the end of transition contact 3 is referred to using wide formula list
It is arranged with main arc contact into camber line.The electric arc moving contact piece 43 is located at the both sides of carried flow contact blade 48, and the carried flow touches
Head piece 48 uses four point contacts with fixed contact 5, and 43 front end of electric arc moving contact piece, two outside and the both sides of fixed contact 5 are inlayed
There is the copper-tungsten block for electrical arc erosion against corrosion.
The utility model also has the characteristics that, 1) main arc contact uses " clip type " way of contact with transition contact, can
Increase Strong contact anti-short circuit capabilities.There is simple in structure and electric power compensation contact pressure；2) long-term current-carrying task with
The combined type main arc contact structure that load transfer task design is integrated.Main arc contact uses the point contact side of " multiple spot arranged side by side "
Formula.Sui contact points n increase, contact Wen Shengyu contact points n square in inverse ratio reduce；Contact anti-short circuit capability with
Square proportional increase of contact points n.For 10~35kV400A load ratio bridging switches, main arc contact uses four pack formulas
Touch bridge " 8 points arranged side by side " way of contact.The intermediate contact of tactile bridge is made with fixed contact using electrician's copper side by side, for long-term current-carrying；
Copper-tungsten electrical arc erosion against corrosion is inlayed in two outsides of tactile bridge with fixed contact both sides side by side.This unitized minor arc touches
Header structure is succinct, has not only met current-carrying requirement, but also reduce electrical arc erosion, has greatly improved the contact service life；3) transition contact is only being converted
Period plays a part of current-carrying in short-term and bears electric arc.Thus it can refer to clip type two-point contact mode by wide formula list in structure
Copper-tungsten arc contact designs.
It should be pointed out that above example is only the representative example of the present invention.The present invention can also there are many deform.It is every
Any simple modification, equivalent change and modification that essence according to the present invention makees above example is considered as belonging to this
The protection domain of invention.
Claims (5)
1. a kind of large capacity combined load ratio bridging switch, including motor, quick mechanism, insulating cylinder, insulation spindle and contact system
System, the contact system include the moving contact being mounted on insulation spindle (2) and the fixed contact (5) on insulating cylinder (1)；
The moving contact is three-phase, includes a main arc contact (4) and two transition contacts (3), the main arc contact per phase moving contact
(4) it is electrically connected with transition contact (3) via a transition resistance, forms the combined load ratio bridging switch of double resistor transitions；Its
It is characterized in that：The main arc contact (4) with transition contact (3) using clip type structure, by current-carrying touched by the main arc contact (4)
Head and arc contact form monoblock type structure of contact terminal；The main arc contact (4) including stent (41), carried flow contact blade (48),
Electric arc moving contact piece (43), pin (44) and spring (47), in the carried flow contact blade (48) and electric arc moving contact piece (43)
Portion is longitudinally equipped with long stripes through hole, and the pin (44) is through stent (41) two side and multiple long stripes through holes by multiple loads
Contact blade (48) to be flowed to limit in stent (41) with electric arc moving contact piece (43), one end of the pin (44) is additionally provided with bayonet lock,
Spring (47) is additionally provided between multiple carried flow contact blades (48), multiple electric arc moving contact pieces (43) and stent (41) so that more
A carried flow contact blade (48), multiple electric arc moving contact pieces (43) offset with fixed contact (5).
2. a kind of large capacity combined load ratio bridging switch according to claim 1, it is characterised in that：The stent (41)
Upper to be additionally provided with multiple rivets (42) with the corresponding position of multiple moving contact pieces (43), one end of the spring (47) is set in riveting
It follows closely on (42).
3. a kind of large capacity combined load ratio bridging switch according to claim 1, it is characterised in that：The moving contact piece
(43) between stent, washer (46) is equipped between adjacent moving contact piece (43).
4. a kind of large capacity combined load ratio bridging switch according to claim 1, it is characterised in that：The transition contact
(3) the copper-tungsten arc contact of clip type two-point contact mode and end and the minor arc of transition contact (3) are referred to using wide formula list
Contact is arranged into camber line.
5. a kind of large capacity combined load ratio bridging switch according to claim 1, it is characterised in that：The electric arc moves tactile
Positioned at the both sides of carried flow contact blade (48), the carried flow contact blade (48) is connect head piece (43) with fixed contact (5) using 4 points
It touches, two outside of electric arc moving contact piece (43) front end and the both sides of fixed contact (5) are inlaid with for electrical arc erosion against corrosion
Copper-tungsten block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721527975.5U CN207474324U (en) | 2017-11-15 | 2017-11-15 | A kind of large capacity combined load ratio bridging switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721527975.5U CN207474324U (en) | 2017-11-15 | 2017-11-15 | A kind of large capacity combined load ratio bridging switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207474324U true CN207474324U (en) | 2018-06-08 |
Family
ID=62260772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721527975.5U Active CN207474324U (en) | 2017-11-15 | 2017-11-15 | A kind of large capacity combined load ratio bridging switch |
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| CN (1) | CN207474324U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112635211A (en) * | 2020-12-18 | 2021-04-09 | 双城市机电技术开发有限公司 | Heavy current moving contact structure |
-
2017
- 2017-11-15 CN CN201721527975.5U patent/CN207474324U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112635211A (en) * | 2020-12-18 | 2021-04-09 | 双城市机电技术开发有限公司 | Heavy current moving contact structure |
| CN112635211B (en) * | 2020-12-18 | 2023-11-03 | 双城市机电技术开发有限公司 | Heavy current moving contact structure |
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