CN105931926A - Molded case circuit breaker - Google Patents
Molded case circuit breaker Download PDFInfo
- Publication number
- CN105931926A CN105931926A CN201610355084.XA CN201610355084A CN105931926A CN 105931926 A CN105931926 A CN 105931926A CN 201610355084 A CN201610355084 A CN 201610355084A CN 105931926 A CN105931926 A CN 105931926A
- Authority
- CN
- China
- Prior art keywords
- columnar part
- circuit breaker
- connecting column
- case circuit
- binding post
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/08—Terminals; Connections
Abstract
The invention discloses a molded case circuit breaker, belongs to the field of electrical equipment, and in particular relates to a molded case circuit breaker. The molded case circuit breaker disclosed by the invention comprises a case, a movable contact, a stationary contact, a handle arranged on the case and wiring terminals linked with the stationary contact, wherein each wiring terminal is provided with a linking post, the linking post is partly embedded into the wiring terminal and in interference fit with the wiring terminal, the linking post is provided with a first conductive columnar part in interference fit with a power bus, a second conductive columnar part is coaxially arranged in the first columnar part, the first and second columnar parts are in interference fit with each other, and the thermal expansion coefficient of the second columnar part is more than that of the first columnar part. The molded case circuit breaker disclosed by the invention has the advantages that 1, the more conductive areas are generated with the same splicing length, and thus the current density is reduced, and the lower temperature rise of the wiring terminal is achieved; 2, the consumption of the buses reduced, and the resources are saved; and 3, the electric clearance or safe distance is increased, and the electrical security of the equipment is improved.
Description
Technical field
The present invention relates to field of electrical equipment, be specifically related to a kind of moulded case circuit breaker.
Background technology
In existing electric power complete set of equipments factory, moulded case circuit breaker (abbreviation breaker of plastic casing) is arranged in power distribution cabinet by workmen, the binding post of moulded case circuit breaker generally uses power bus-bar directly to couple, power bus-bar is directly overlapped on binding post, binding post couples the generally overlapping splicing processes of employing with power bus-bar, fastens with bolt the most again.As shown in Figure 3 and Figure 4, such coupling method needs overlapping with binding post for busbar certain length, so that the electric current density of contact surface maintains in certain limit value, so that the temperature rise of connection place meets relevant criterion.In order to make connection place temperature rise low, it usually needs increase the length that busbar is overlapping with terminal, make contact area increase, and then make the electric current density of contact surface reduce, finally make connection place have relatively low temperature rise.And increase overlap length and can strengthen the consumption of busbar, and then increase manufacturing cost.The bolt of fastening can make the electric clearance between conductive component and non conductive component or safe distance reduce, in order to make electric clearance or safe distance keep constant, need to strengthen the spacing between binding post and non conductive component, and strengthen spacing and necessarily cause the overall dimensions of whole moulded case circuit breaker to become big.How to increase contact area and to make connection place temperature rise low, but do not reduce electric clearance, and do not strengthen connection place and take up room.
Summary of the invention
It is an object of the invention to solve the problems referred to above, and a kind of moulded case circuit breaker is provided.
For this, the present invention provides a kind of moulded case circuit breaker, it includes that shell, part expose binding post and the handle of outer casing frontispiece setting of shell, moving contact, static contact and electrical apparatus release are set in shell, moving contact couples with electrical apparatus release, static contact couples with binding post, and handle couples with moving contact.Binding post is provided with connecting column, connecting column be partially submerged into binding post and with binding post interference fit, connecting column is provided with the first columnar part of the conduction with power bus-bar interference fit, first columnar part is coaxially disposed second columnar part with electric conductivity, first columnar part and the second columnar part interference fit, second columnar part is positioned at inside the first columnar part, and the coefficient of thermal expansion of the second columnar part is more than the coefficient of thermal expansion of the first columnar part.
Advantageously, the resistivity of the second columnar part is more than the resistivity of the first columnar part.
Specifically, the material of the second columnar part is aluminum or aluminium alloy, and the material of the first columnar part is copper or copper alloy.
Preferably, the ratio of the external diameter of the external diameter of the second columnar part and the first columnar part is 0.5-0.8.
Specifically, the second columnar part has solid construction, and the first columnar part has the structure of hollow, and the second columnar part runs through the first columnar part.
Advantageously, being coaxially arranged with the second through hole inside connecting column, the outer cylinder of connecting column is radially arranged the first through hole, the first through hole and the connection of the second through hole, and the first through hole is positioned at the axial middle part of connecting column.
Beneficial effect
Owing to the binding post of moulded case circuit breaker disclosed by the invention uses the connecting mode of docking to couple with power bus-bar, relative to existing overlapping overlapping mode, it can bring following beneficial effect.
The most identical lap of splice produces more conductive area, and then reduces electric current density, it is achieved the low-temperature-rise of connection place.
2., without busbar being carried out overlapping overlap joint, reducing the consumption of busbar, having saved resource.
3., owing to eliminating fastening bolt and nut, so increasing electric clearance or safe distance, improve the electrical security of equipment.
4., owing to eliminating fastening bolt and nut, so the distance between connection place and non conductive component becomes big, and connection place takes up room and does not increase.
Accompanying drawing explanation
In explanation below in reference to the accompanying drawing embodiment to being given as non-limiting example, the present invention and superiority thereof will be better understood, accompanying drawing is as follows:
Fig. 1 is the axonometric chart in existing moulded case circuit breaker front；
Fig. 2 is the axonometric chart at the existing moulded case circuit breaker back side；
Fig. 3 is the axonometric chart in existing moulded case circuit breaker front, and wherein power bus-bar is to connecting；
Fig. 4 is the axonometric chart at the existing moulded case circuit breaker back side, and wherein power bus-bar is to connecting；
Fig. 5 is the axonometric chart in moulded case circuit breaker front disclosed by the invention；
Fig. 6 is the axonometric chart at the moulded case circuit breaker back side disclosed by the invention；
Fig. 7 is the axonometric chart in moulded case circuit breaker front disclosed by the invention, and wherein power bus-bar is to connecting；
Fig. 8 is the axonometric chart at the moulded case circuit breaker back side disclosed by the invention, and wherein power bus-bar is to connecting；
Fig. 9 is size comparison's figure of existing power bus-bar overlapping mode and power bus-bar docking mode disclosed by the invention；
Figure 10 is the exploded partial perspective view of the binding post position of Fig. 7；
Figure 11 is the axonometric chart of connecting column disclosed by the invention；
Figure 12 is the perspective cut-away view of Figure 11；
Figure 13 is the exploded perspective view of Figure 11；
Figure 14-15 is the arrangement schematic diagram of connecting column disclosed by the invention；
Figure 16 is the axonometric chart of power bus-bar；
Figure 17 is the electrical schematic diagram of moulded case circuit breaker.
Description of reference numerals
1. the first columnar part；2. the second columnar part；3. front；4. the back side；5. end face；6. the first through hole；7. the second through hole；9. shell；10. handle.
Detailed description of the invention
R in present specification represents radius.
As depicted in figs. 1 and 2, it it is a kind of existing moulded case circuit breaker, it includes that shell 9, part expose binding post and the handle 10 of shell 9 front setting of shell 9, moving contact, static contact and electrical apparatus release are set in shell 9, moving contact couples with electrical apparatus release, static contact couples with binding post, and handle couples with moving contact.By down pressing handle 10, the moving contact in shell 9 can be made to separate with static contact, thus realize the disconnection of circuit.By up pushing handle 10, the moving contact in shell 9 can be made to close with static contact, thus realize the connection of circuit.When circuit is short-circuited, the electrical apparatus release action in shell 9, make moving contact separate with static contact, thus realize the short-circuit protection of circuit.
As shown in Figure 3 and Figure 4, the binding post of existing moulded case circuit breaker and the connecting mode of power bus-bar, the connecting mode used is overlapping overlapping mode, after power bus-bar and binding post overlap certain length, the two being fastened with screw bolt and nut, such connecting mode is defined as overlap joint again.
As shown in Figure 5 and Figure 6, moulded case circuit breaker disclosed by the invention, it includes that shell 9, part expose binding post and the handle 10 of shell 9 front setting of shell 9, moving contact, static contact and electrical apparatus release are set in shell 9, moving contact couples with electrical apparatus release, static contact couples with binding post, and handle couples with moving contact.By down pressing handle 10, the moving contact in shell 9 can be made to separate with static contact, thus realize the disconnection of circuit.By up pushing handle 10, the moving contact in shell 9 can be made to close with static contact, thus realize the connection of circuit.When circuit is short-circuited, the electrical apparatus release action in shell 9, make moving contact separate with static contact, thus realize the short-circuit protection of circuit.Therefore by operation handle 10, separating and Guan Bi of moving contact and static contact can be realized, or pass through electrical apparatus release, it is possible to realize separating of moving contact and static contact, and then realize the moulded case circuit breaker protection to circuit, as shown in figure 17.
As shown in Figure 5 and Figure 6, binding post is provided with connecting column, connecting column be partially submerged into binding post and with binding post interference fit, embedded length is the half of connecting column length, the lower half of connecting column embeds binding post, and connecting column is coupled by the pin in binding post front with the fastening of both binding posts.
As shown in Figure 7 and Figure 8, the connecting column that pre-manufactured hole on power bus-bar is inserted on binding post, power bus-bar and connecting column interference fit, the end face laminating of the end face of power bus-bar and binding post, connecting column is coupled by the pin in power bus-bar front with the fastening of both power bus-bars, and such connecting mode is defined as docking.
As shown in Figure 9, it it is size comparison's figure of existing power bus-bar overlapping mode and power bus-bar docking mode disclosed by the invention, the first half is the binding post overlapping mode with power bus-bar of existing moulded case circuit breaker, and lower half is the binding post docking mode with power bus-bar of moulded case circuit breaker disclosed by the invention.In order to strengthen the contrast effect of two kinds of connecting modes, connecting mode disclosed by the invention is set directly at the lower section of existing connecting mode, and the dotted line in figure is equal just to the thickness embodying upper and lower busbar, does not represent the physical connection mode of upper and lower busbar.Two kinds of connecting modes the lap of splice the same, be all L5, be presented as: the overlap length of the power bus-bar under existing connecting mode and binding post is L5, and the length of the connecting column under connecting mode disclosed by the invention is also L5.The directly perceived change that two kinds of connecting modes bring is exactly the significant change of relative dimensions, L1 is the electric clearance under existing connecting mode or relatively distance, L2 is the electric clearance under connecting mode disclosed by the invention or relatively distance, L3 is that the connection place under existing connecting mode takies width, L4 is that the connection place under connecting mode disclosed by the invention takies width, L7 is the safe distance under existing connecting mode, and L9 is the safe distance under connecting mode disclosed by the invention.Can visually see from figure: L2 is significantly greater than L1, the height of the size of increase about nut adds bolt tail and highlights the height of nut.L4 is significantly less than L3, and the size of reduction about busbar thickness adds bolt head height and adds height of nut and add bolt tail and highlight the height of nut.L9 is significantly greater than L7, and the thickness of the chi of increase about busbar adds bolt head height.Therefore, the factor (electric clearance or relatively distance or safe distance) that power equipment is favourable is improved, and factor disadvantageous to power equipment (connection place takes up room) is reduced.
As shown in Figure 10, before connecting column is assemblied in binding post, first the end face 5 at binding post processes 3 pre-manufactured holes receiving connecting columns along the length direction of outfan, and the diameter of pre-manufactured hole is slightly less than the external diameter of connecting column, makes connecting column and pre-manufactured hole interference fit diametrically；The degree of depth of the pre-manufactured hole connecting column length slightly larger than 0.5 times, after pre-manufactured hole processes, the half length of connecting column is inserted in pre-manufactured hole, the first through hole in the middle part of connecting column is made to be at end face 5, vertically process the through hole for assembling pin from the front 3 of binding post, make through hole run through front 3 and the back side 4 of binding post, and run through connecting column simultaneously, the axis of through hole and the axes intersect of connecting column, coupled the fastening of both binding post and connecting column by pin.
As shown in figure 16, before power bus-bar is assemblied in binding post, first the end face 5 at power bus-bar processes 3 pre-manufactured holes along busbar length direction, and the diameter of pre-manufactured hole is slightly less than the external diameter coupling pillar, makes connecting column and pre-manufactured hole interference fit diametrically；The degree of depth of the pre-manufactured hole connecting column length slightly larger than 0.5 times, after pre-manufactured hole processes, pre-manufactured hole on power bus-bar is inserted in the connecting column revealed on binding post, fit with the end face 5 of binding post until the end face 5 of power bus-bar, the through hole for assembling pin is vertically processed from the front 3 of power bus-bar, through hole is made to run through front 3 and the back side 4 of power bus-bar, and run through connecting column simultaneously, the axis of through hole and the axes intersect of connecting column, by pin, the fastening of both power bus-bar and connecting column is coupled, the fastening finally achieving power bus-bar and binding post couples.
After binding post and power bus-bar docking, making being close to of the end face of connecting column and pre-manufactured hole matched in clearance in the axial direction, beneficially binding post and the end face of power bus-bar, the head of pre-manufactured hole is machined with the chamfering of convenient installation.Due to hole and pin interference fit, after pin assembling puts in place, can limit binding post and mutual the moving axially of power bus-bar, finally make binding post, connecting column, power bus-bar, pin firmly couples together.
As shown in figure 11, a kind of connecting column of the binding post of moulded case circuit breaker disclosed by the invention, it has columned profile, and end is provided with chamfering convenient for assembly.
As shown in figure 12, being coaxially disposed the second columnar part 2 in the first columnar part 1, the first columnar part 1 and the second columnar part 2 interference fit, the material of the first columnar part 1 is copper, and the material of the second columnar part 2 is aluminum.
As shown in figure 13, the first columnar part 1 has the structure of hollow, and the second columnar part 2 runs through the first columnar part 1, and the ratio of the external diameter of the second columnar part 2 and the external diameter of the first columnar part 1 is 0.5-0.8.First and second columnar part 1,2 all has electric conductivity, and the coefficient of thermal expansion of the second columnar part 2 is more than the coefficient of thermal expansion of the first columnar part 1, and the resistivity of the second columnar part 2 is more than the resistivity of the first columnar part 1.
After connecting column is assemblied in binding post and power bus-bar, due to the first columnar part 1 and binding post and the pre-manufactured hole interference fit of busbar, so, the first columnar part 1 and binding post and busbar fit tightly, and the first columnar part 1 of connecting column fully carries electric current.Due to the first columnar part 1 and the second columnar part 2 also interference fit, so the first columnar part 1 and the second columnar part 2 also fit tightly, the second columnar part 2 the most fully carries electric current.nullTherefore，The heat effect of the first columnar part 1 and the second columnar part 2 can give full play to，Resistivity due to the second columnar part 2 is more than the resistivity of the first columnar part 1，So the temperature of the second columnar part 2 can be higher than the first columnar part 1，Coefficient of thermal expansion due to the second columnar part 2 is more than the coefficient of thermal expansion of the first columnar part 1，Therefore，In the case of temperature and coefficient of thermal expansion are the most relatively high，The radially enlarged phenomenon of the second columnar part 2 can be significantly greater than the radially enlarged phenomenon of the first columnar part 1，Therefore the second columnar part 2 can fit tightly the first columnar part 1 and apply radially outer pressure to the first columnar part 1，The radial dimension thus making the first columnar part 1 the most outwards becomes big，The pre-manufactured hole ultimately resulting in the first columnar part 1 and binding post and power bus-bar more fits tightly，The most also radially outer pressure is provided to pre-manufactured hole，I.e. pressure ratio connecting column between connecting column and binding post and busbar is bigger when just assembling，Increasing contact pressure can also make the temperature rise of contact site reduce.
As can be seen here, the coupling of interference fit, the coupling of resistivity and the coefficient of thermal expansion between each feature has obvious action to reducing the binding post temperature rise with busbar connection place, effect between three is complementary, originally interference fit makes resistivity and coefficient of thermal expansion have the basis played a role, and the effect that resistivity and coefficient of thermal expansion produce exacerbates interference fit, finally so that the contact pressure of connection place strengthens.
As shown in figure 14, cross section is foursquare power bus-bar, and centre is provided with a pre-manufactured hole receiving connecting column, and the distance of pre-manufactured hole circumference to bus bar edge is R, and busbar width is L6.When using existing overlapping splicing processes to couple, the conductive area of connection place is
S1=L6xL5=(R+2R+R) xL5=4RxL5(L5 is the lap of splice, as shown in Figure 9)
And when using connecting column to couple, the conductive area of connection place is
S2=2πRxL5
Therefore,
S2: S1=2πR:
4R=π/2≈1.57
So, use the mode of connecting column overlap joint can obtain more contact area.Obviously, under conditions of meeting mechanical strength, increase the diameter of pre-manufactured hole, reduce hole back gauge and can obtain bigger contact area.
As shown in figure 15, cross section is rectangular power bus-bar, and centre arranges 3 pre-manufactured holes receiving connecting column, and the distance of pre-manufactured hole circumference to bus bar edge is R, and the beeline between each hole is R, and busbar width is L6.When using existing overlapping splicing processes to couple,
The conductive area of connection place is
S1=L6xL5=(4R+3x2R)xL5=10RxL5
And when using connecting column to couple, the conductive area of connection place is
S2=3x2πRxL5=6πRxL5
Therefore,
S2: S1=6πR:
10R=3π/5≈1.884
So, use the mode of connecting column overlap joint can obtain more contact area.Obviously, under conditions of meeting mechanical strength, increase the diameter of pre-manufactured hole, reduce hole back gauge and can obtain bigger contact area.
Therefore, connecting column disclosed by the invention creates the good effect of two aspects, and one is the increase in contact pressure, two is to have increased considerably conductive area, under the common effect of the two active factor, the temperature rise of connection place is greatly lowered, it is achieved that the purpose of the present invention.
As shown in figure 16, in order to distinguish each face of busbar and binding post, end face 5 is defined as the thickness with busbar (or binding post) and the face of width composition, i.e. identify the face of 5 in Figure 16.Front and back is defined as the width with busbar (or binding post) and the face of length composition, i.e. identifying the face of 3,4 in figure, and 3 is front, and 4 is the back side.
As shown in figure 12, the inside of the second columnar part 2 is coaxially arranged with the second through hole 7, first columnar part 6 has hollow structure, second columnar part 2 runs through the first columnar part 1, the outer cylinder of the first columnar part 1 is radially arranged the first through hole 6, first through hole 6 connects with the second through hole 7, and the first through hole 6 is positioned at the axial middle part of the first columnar part 1.
Setting due to through hole 6,7, make connecting column during the pre-manufactured hole inserting binding post, air in pre-manufactured hole can successfully be discharged from the second through hole 7, and then connecting column can successfully be assembled put in place, when power bus-bar is inserted in already installed connecting column, air in the pre-manufactured hole of power bus-bar can be smoothly through the second through hole 7 and discharge from the first through hole 6, and then the second busbar can be assembled smoothly put in place.
Embodiment two
The material of the first columnar part 1 in embodiment one is changed to copper alloy, the material of the second columnar part 2 changes to aluminium alloy, owing to the hardness of alloy is more relatively high, first the second columnar part 2 can be preserved under low temperature environment (5 degree) a period of time (5 minutes), and the first columnar part 1 preserves a period of time (5 minutes) under hot environment (80 degree), by effect of expanding with heat and contract with cold, the internal diameter that can make the first columnar part 1 slightly becomes big, and the external diameter of the first columnar part 1 slightly diminishes, and then easily the second columnar part 2 is assembled in the first columnar part 1, after the connecting column prepared to be installed recovers room temperature, first columnar part 1 and the second columnar part 2 can realize interference fit.The diameter of connecting column disclosed by the invention and length have different size specification, to adapt to different busbar size or the needs of binding post size.
Claims (6)
1. a moulded case circuit breaker, it includes that shell (9), part expose binding post and the handle (10) of shell (9) front setting of shell (9), shell arranges moving contact, static contact and electrical apparatus release in (9), moving contact couples with electrical apparatus release, static contact couples with binding post, and handle couples with moving contact；It is characterized in that, binding post is provided with connecting column, connecting column be partially submerged into binding post and with binding post interference fit, connecting column is provided with first columnar part (1) of the conduction with power bus-bar interference fit, first columnar part (1) is coaxially disposed second columnar part (2) with electric conductivity, first columnar part (1) and the second columnar part (2) interference fit, it is internal that second columnar part (2) is positioned at the first columnar part (1), and the coefficient of thermal expansion of the second columnar part (2) is more than the coefficient of thermal expansion of the first columnar part (1).
A kind of moulded case circuit breaker the most according to claim 1, it is characterised in that the resistivity of described the second columnar part (2) is more than the resistivity of the first columnar part (1).
A kind of moulded case circuit breaker the most according to claim 2, it is characterised in that the material of described the second columnar part (2) is aluminum or aluminium alloy, and the material of the first columnar part (1) is copper or copper alloy.
A kind of moulded case circuit breaker the most according to claim 1, it is characterised in that the ratio of the external diameter of described the second columnar part (2) and the external diameter of the first columnar part (1) is 0.5-0.8.
A kind of moulded case circuit breaker the most according to claim 4, it is characterised in that the second columnar part (2) has solid construction, and the first columnar part (1) has hollow structure, and the second columnar part (2) runs through the first columnar part (1).
A kind of moulded case circuit breaker the most according to claim 4, it is characterized in that, the second through hole (7) it is coaxially arranged with inside connecting column, the outer cylinder of connecting column is radially arranged the first through hole (6), first through hole (7) connects with the second through hole (6), and the first through hole (6) is positioned at the axial middle part of connecting column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610355084.XA CN105931926A (en) | 2016-05-25 | 2016-05-25 | Molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610355084.XA CN105931926A (en) | 2016-05-25 | 2016-05-25 | Molded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105931926A true CN105931926A (en) | 2016-09-07 |
Family
ID=56842276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610355084.XA Pending CN105931926A (en) | 2016-05-25 | 2016-05-25 | Molded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105931926A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6255925B1 (en) * | 2000-02-18 | 2001-07-03 | Siemens Energy & Automation, Inc. | Thermal-magnetic trip unit with adjustable magnetic tripping |
| CN201663116U (en) * | 2009-12-15 | 2010-12-01 | 浙江森泰电器厂 | Modularized molded-case circuit breaker |
| CN202268489U (en) * | 2011-08-11 | 2012-06-06 | 泰科电子(上海)有限公司 | Electrical connection assembly |
| CN203799988U (en) * | 2014-04-29 | 2014-08-27 | 长江电气集团股份有限公司 | Plastic casing electricity leakage breaker |
| CN104852163A (en) * | 2015-05-27 | 2015-08-19 | 国网山东济南市长清区供电公司 | Assembly type cable connector |
-
2016
- 2016-05-25 CN CN201610355084.XA patent/CN105931926A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6255925B1 (en) * | 2000-02-18 | 2001-07-03 | Siemens Energy & Automation, Inc. | Thermal-magnetic trip unit with adjustable magnetic tripping |
| CN201663116U (en) * | 2009-12-15 | 2010-12-01 | 浙江森泰电器厂 | Modularized molded-case circuit breaker |
| CN202268489U (en) * | 2011-08-11 | 2012-06-06 | 泰科电子(上海)有限公司 | Electrical connection assembly |
| CN203799988U (en) * | 2014-04-29 | 2014-08-27 | 长江电气集团股份有限公司 | Plastic casing electricity leakage breaker |
| CN104852163A (en) * | 2015-05-27 | 2015-08-19 | 国网山东济南市长清区供电公司 | Assembly type cable connector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105788988A (en) | Design method of disconnecting switch fuse achieving side operation | |
| CN105896112B (en) | Reduce the connecting column of electrician's busbar lap-joint temperature rise | |
| CN105761909A (en) | Low voltage side wire-out device of power transformer | |
| CN105788893A (en) | Front-operated disconnecting switch fuse | |
| CN105845467A (en) | Design method for integrated fixed contact of electric power switch | |
| CN105720538A (en) | Design method of connecting column for reducing temperature rise at overlap position between electric bus bars | |
| CN105896429A (en) | Construction method for reducing temperature rise at electrician busbar lap joint part | |
| CN201717548U (en) | Busbar connection device and cabinet insulation seat thereof | |
| CN105931926A (en) | Molded case circuit breaker | |
| CN105931925A (en) | Design method for molded case circuit breaker | |
| CN105914087A (en) | Isolating switch operated on front side | |
| CN105761908A (en) | Dry-type electric transformer | |
| CN105788895A (en) | Isolating switch with disconnection state of contact visible | |
| CN105826122A (en) | Design method of isolating switch operated from side | |
| CN105931868A (en) | Side operated isolation switch | |
| CN106025809A (en) | Laterally operated isolating switch fuse | |
| CN105914088A (en) | Method of designing isolating switch fuse operated on front side | |
| CN105788894A (en) | Design method for front-operated disconnecting switch | |
| CN105810491A (en) | Fuse type isolating switch | |
| CN105788897A (en) | Design method for fuse disconnecting switch | |
| CN105931867A (en) | Design method for dual-power electric change-over switch | |
| CN105845508A (en) | Contactor | |
| CN106057444A (en) | Design method for power transformer low voltage side outlet apparatus | |
| CN105931927A (en) | Frame circuit breaker | |
| CN105788910A (en) | Dual-power manual change-over switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160907 |
|
| RJ01 | Rejection of invention patent application after publication |