CN201732750U - Rotary type double-breakpoint quadrupole molded case circuit breaker - Google Patents
Rotary type double-breakpoint quadrupole molded case circuit breaker Download PDFInfo
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- CN201732750U CN201732750U CN201020274913XU CN201020274913U CN201732750U CN 201732750 U CN201732750 U CN 201732750U CN 201020274913X U CN201020274913X U CN 201020274913XU CN 201020274913 U CN201020274913 U CN 201020274913U CN 201732750 U CN201732750 U CN 201732750U
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- 230000003068 static effect Effects 0.000 claims abstract description 25
- 230000007935 neutral effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
A rotary type double-breakpoint quadrupole molded case circuit breaker belongs to the technical field of low-voltage apparatuses and comprises an A pole cut-off unit, a B pole cut-off unit, a C pole cut-off unit, an N pole cut-off unit, rotary shafts, moving contact terminals and static contact terminals. The rotary shafts, moving contact terminals and static contact terminals are provided with limit surfaces and arranged in each single pole cut-off unit, each moving contact terminal comprises a moving conductive rod and a moving contact, the moving conductive rod is provided with a contact limit surface, each static contact terminal consists of a static conductive rod and a static contact, and the static conductive rod is provided with a mounting surface. The circuit breaker is characterized in that the first distance between the moving contact and the static contact of the N pole cut-off unit is shorter than distances among the moving contacts and the static contacts of the A pole cut-off unit, the B pole cut-off unit and the C pole cut-off unit, and has the advantages of ensuring that the moving contact and the static contact of the N pole cut-off unit can not be cut off and then connected before on and off of the moving contacts and the static contacts of the A pole cut-off unit, the B pole cut-off unit and the C pole cut-off unit.
Description
Technical field
The utility model belongs to the low voltage electrical apparatus technology field, is specifically related to a kind of rotary double break and puts four utmost point breaker of plastic casing.
Background technology
Aforesaid four utmost point breaker of plastic casing are meant that satisfying the rotary double break that the neutral pole of break-make " can not allow to divide the connection of having no progeny extremely earlier than other " that stipulate in China's national standard require puts four utmost point breaker of plastic casing.
As the reason known to the those of skill in the art, breaker of plastic casing is applicable in the low voltage power distribution network that its taking on of task is: can in time move with protective circuit and load when subordinate's circuit breaks down because of load.Four-pole circuit breaker normally increases a neutral pole (being the N utmost point) again on the basis of three-pole breaker, the effect of adopting four-pole circuit breaker is to guarantee maintenance safety, but also brings " disconnected zero " hidden danger simultaneously.
As described above, by the national standard requirement, neutral pole that can break-make does not allow to divide the connection of having no progeny extremely earlier than other, therefore design requires the sound contact of neutral pole (being the N utmost point) then to disconnect in the phase line contact prior to the phase line contacting usually to four utmost point breaker of plastic casing, prevent that therefrom moment " disconnected zero " phenomenon from appearring in circuit breaker when on/off switch, avoid causing neutral point drifting to cause imbalance of three-phase voltage, avoid the part single-phase load under overvoltage is impacted, the lost of life to occur even burnt.
At present, overall structure is all adopted in the rotating shaft of four utmost point breaker of plastic casing of single-break, integrally-built rotating shaft has strong point easily manufactured and quick for installation and that integraty is good, yet often have a certain amount of axial deformation in manufacture process inevitably, the axial deformation factor can expose following shortcoming after circuit breaker assembling finishes: be difficult to when closing a floodgate to guarantee that the N utmost point is unlike as the A utmost point, the B utmost point and the C of the phase line utmost point characteristic requirement that extremely back is connected and the N utmost point disconnects extremely earlier unlike other A utmost point, the B utmost point and C during at separating brake.
In order to guarantee that neutral pole is that the N utmost point divides the connection of having no progeny extremely earlier unlike the A utmost point, the B utmost point and C, adopt the confined planes height that reduces rotating shaft and neutral pole moving contact place to guarantee usually.Specifically by shown in Figure 6, this figure has illustrated the rotating shaft of single-break four utmost point breaker of plastic casing in the prior art and the structure of moving contact, in rotating shaft 1, have a difference in height Δ L corresponding to the confined planes 11 of the N utmost point and confined planes 11, make break distance between the N utmost point dynamic/static contact less than the break distance between the A utmost point, the B utmost point and the C utmost point dynamic/static contact by this difference in height Δ L corresponding to the A utmost point, the B utmost point and the C utmost point.
Figure 7 shows that the modular rotary double break of one pole in the prior art puts the N utmost point auxiliary operation mechanism of four utmost point breaker of plastic casing, with respect to structure shown in Figure 6, changed the phenomenon of the N utmost point, the A utmost point, the B utmost point and the extremely shared rotating shaft of C, the rotating shaft of each utmost point all is identical, and the dynamic/static contact of each utmost point also is identical.In order to guarantee that the N utmost point divides the connection of having no progeny extremely earlier unlike the A utmost point, the B utmost point and C, simultaneously also for the N utmost point can reliably be contacted, so set up a N utmost point auxiliary operation mechanism 4 on extremely at N.But,,, but still be not enough to guarantee that the aforesaid N utmost point can not divide the connection of having no progeny extremely earlier than the A utmost point, the B utmost point and C even if set up N utmost point auxiliary operation mechanism 4 owing in manufacturing and assembling process, have error unavoidably.
Summary of the invention
Task of the present utility model is to provide a kind of and helps to realize reliably that the N utmost point can not divide the rotary double break of connecting of having no progeny to put four utmost point breaker of plastic casing extremely earlier than the A utmost point, the B utmost point and C.
Task of the present utility model is finished like this, a kind of rotary double break is put four utmost point breaker of plastic casing, comprise the A utmost point, the B utmost point, four one poles of the C utmost point and the N utmost point cut-off the unit, be arranged on each one pole and cut-off the rotating shaft that respectively has confined planes in the unit, moving contact and fixed contact, moving contact comprises moving conductive rod and the moving contact with contact confined planes, and fixed contact comprises static conductive rod and the fixed contact with installed surface, the moving contact that the one pole that is characterised in that the described N utmost point cut-offs the unit to the distance of first between the fixed contact than the described A utmost point, the moving contact that the one pole of the B utmost point and the C utmost point cut-offs the unit is little to the break distance between the fixed contact.
The second distance of contact confined planes and the centre of gyration of moving conductive rod that the one pole of the N utmost point described in the utility model cut-offs the moving conductive rod of unit cut-offs the unit than the one pole of the described A utmost point, the B utmost point and the C utmost point the distance of the centre of gyration that contacts confined planes and moving conductive rod of moving conductive rod is little.
It is dark that the one pole of the described A utmost point of depth ratio, the B utmost point and the C utmost point of confined planes that the one pole of the N utmost point described in the utility model cut-offs the rotating shaft of unit cut-offs the confined planes of rotating shaft of unit.
The installed surface of static conductive rod that the one pole of the N utmost point described in the utility model cut-offs the fixed contact of unit cut-offs the unit than the one pole of the described A utmost point, the B utmost point and the C utmost point to the 3rd distance of described fixed contact the installed surface of static conductive rod of fixed contact is big to the distance of fixed contact.
The technical scheme that the utility model provides is owing to the above-mentioned design of employing, thereby the dynamic and static contact that can guarantee the N utmost point can not divide the connection of having no progeny earlier than the dynamic and static contact of the A utmost point, the B utmost point and the C utmost point.
Description of drawings
Fig. 1 is the schematic diagram that rotary double break that four one poles of the A of the having utmost point of the present utility model, the B utmost point, the C utmost point and the N utmost point cut-off the unit is put four utmost point breaker of plastic casing.
Fig. 2 is that four one poles of the A utmost point, the B utmost point, the C utmost point and the N utmost point cut-off the rotating shaft of unit and the cutaway view of dynamic and static contact.
Fig. 3 is the schematic diagram of moving contact.
Fig. 4 is the schematic diagram of rotating shaft.
Fig. 5 cut-offs the schematic diagram of the fixed contact of unit for the one pole of the N utmost point.
Fig. 6 is the rotating shaft of single-break four utmost point breaker of plastic casing in the prior art and the structure chart of moving contact.
Fig. 7 puts the schematic diagram of the N utmost point auxiliary operation mechanism of four utmost point breaker of plastic casing for the modular rotary double break of one pole in the prior art.
Embodiment
See Fig. 1, Fig. 2, Fig. 3 and Fig. 4, when the one pole of the N utmost point cut-offs the contact confined planes 211 of moving conductive rod 21 of moving contact 2 of unit when the second distance L2 of the centre of gyration reduces, because the characteristic of moving conductive rod 21, promptly, when not shown spring pushes moving conductive rod 21, the contact confined planes 211 of moving conductive rod 21 is contacted with the confined planes 11 of rotating shaft 1 (confined planes 11 can be described as supporting surface), because second distance L2 reduces, moving contact 22 to first distance L 1 of the disconnection between the fixed contact 32 of fixed contact 3 that causes the one pole of the N utmost point to cut-off the moving contact 2 of unit also reduces.During combined floodgate, the rotating shaft 11 of the A utmost point of circuit breaker, the B utmost point C utmost point and the N utmost point turns over identical angle, the fixed contact 32 contacted time ratio A utmost points, the B utmost point and these three one poles of the C utmost point of moving contact 22 and fixed contact 3 that the one pole of the N utmost point cut-offs the moving contact 2 of unit cut-off the unit moving contact 2 moving contact 22 and fixed contact 3 the 32 contacted times of fixed contact early, thereby can guarantee that the N utmost point is unlike the extremely first disjunction of the A utmost point, the B utmost point and C when closing a floodgate.
When separating brake, the moving contact 22 that the one pole of the N utmost point cut-offs the moving contact 2 of unit leaves the moving contact 22 that these three one poles of the time ratio A utmost point, the B utmost point and the C utmost point of the fixed contact 32 of fixed contact 3 cut-off the moving contact 2 of unit and leaves evening time of the fixed contact 32 of fixed contact 3, thereby can guarantee that the N utmost point is unlike the extremely first disjunction of the A utmost point, the B utmost point and C when separating brake.
The confined planes 11 that cut-offs the rotating shaft 1 of unit when the one pole of the N of the circuit breaker utmost point is lower than the A utmost point, (the A utmost point when one pole of the B utmost point and the C utmost point cut-offs the confined planes 11 of rotating shaft 1 of unit, the confined planes 11 that the one pole of the B utmost point and the C utmost point cut-offs the rotating shaft 1 of unit is identical), because the characteristic of moving conductive rod 21, promptly when not shown spring pushes moving conductive rod 21, the contact confined planes 211 of moving conductive rod 21 is contacted with the confined planes 11 of rotating shaft 1, because cut-offfing the degree of depth of the confined planes 11 of unit, reduces the one pole of the N utmost point, first distance L 1 that makes the one pole of the N utmost point cut-off the disconnection between the fixed contact 32 of the moving contact 22 of moving contact 2 of unit and fixed contact 3 reduces, thereby can guarantee that the N utmost point is unlike the A utmost point, the B utmost point and C divide the connection of having no progeny extremely earlier.
Ask for an interview Fig. 5 and continuation in conjunction with Fig. 2, the one pole that changes the N utmost point cut-offs the U-shaped loop shape of static conductive rod 31 of the fixed contact 3 of unit, installed surface 311 to the 3rd distance L 3 between the fixed contact 32 of fixed contact 3 of static conductive rod 31 that makes the one pole of the N utmost point after the change cut-off the fixed contact 3 of unit increases, when the A of the circuit breaker utmost point, the B utmost point, when installed surface 311 positions of the static conductive rod 31 of the fixed contact 3 of the C utmost point and the N utmost point are identical, because the increase of the 3rd distance L 3, thereby the one pole that makes the aforesaid N utmost point cut-offs first distance L 1 of the disconnection between the fixed contact 32 of the moving contact 22 of moving contact 2 of unit and fixed contact 3 also can be reduced, thereby has guaranteed that the N utmost point is unlike the A utmost point, the B utmost point and C divide the connection of having no progeny extremely earlier.First chain-dotted line 321 that is shown among Fig. 5 is represented the N utmost point, and second chain-dotted line 322 is represented the A utmost point, the B utmost point and the C utmost point.
Claims (4)
1. a rotary double break is put four utmost point breaker of plastic casing, comprise the A utmost point, the B utmost point, four one poles of the C utmost point and the N utmost point cut-off the unit, be arranged on each one pole and cut-off the rotating shaft that respectively has confined planes (11) (1) in the unit, moving contact (2) and fixed contact (3), moving contact (2) comprises moving conductive rod (21) and the moving contact (22) with contact confined planes (211), and fixed contact (3) comprises the have installed surface static conductive rod (31) and the fixed contact (32) of (311), it is characterized in that the one pole of the described N utmost point cut-off the moving contact of unit (22) to the distance of first between the fixed contact (32) (L1) than the described A utmost point, the moving contact (22) that the one pole of the B utmost point and the C utmost point cut-offs the unit is little to the break distance between the fixed contact (32).
2. rotary double break according to claim 1 is put four utmost point breaker of plastic casing, it is characterized in that the contact confined planes (211) that the one pole of the described N utmost point cut-offs the moving conductive rod of unit (21) and the second distance (L2) of the centre of gyration of moving conductive rod (21) cut-off than the described A utmost point, the B utmost point and the one pole of the C utmost point unit moving conductive rod (21) to contact confined planes (211) little with the distance of the centre of gyration of moving conductive rod (21).
3. rotary double break according to claim 1 is put four utmost point breaker of plastic casing, and it is dark to it is characterized in that one pole that the one pole of the described N utmost point cut-offs the described A utmost point of depth ratio, the B utmost point and the C utmost point of the confined planes of the rotating shaft of unit (1) (11) cut-offs the confined planes (11) of rotating shaft (1) of unit.
4. rotary double break according to claim 1 is put four utmost point breaker of plastic casing, and it is characterized in that cut-offfing the installed surface of the static conductive rod of the fixed contact of unit (3) (31) (311) by the one pole of the described N utmost point, cut-off the installed surface (311) of static conductive rod (31) of fixed contact (3) of unit than the one pole of the described A utmost point, the B utmost point and the C utmost point to the 3rd distance (L3) of described fixed contact (32) big to the distance of fixed contact (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020274913XU CN201732750U (en) | 2010-07-28 | 2010-07-28 | Rotary type double-breakpoint quadrupole molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020274913XU CN201732750U (en) | 2010-07-28 | 2010-07-28 | Rotary type double-breakpoint quadrupole molded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201732750U true CN201732750U (en) | 2011-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020274913XU Expired - Lifetime CN201732750U (en) | 2010-07-28 | 2010-07-28 | Rotary type double-breakpoint quadrupole molded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201732750U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111696795A (en) * | 2019-03-14 | 2020-09-22 | 施耐德电器工业公司 | Electrical device for establishing or breaking a current in an electrical circuit |
-
2010
- 2010-07-28 CN CN201020274913XU patent/CN201732750U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111696795A (en) * | 2019-03-14 | 2020-09-22 | 施耐德电器工业公司 | Electrical device for establishing or breaking a current in an electrical circuit |
| CN111696795B (en) * | 2019-03-14 | 2024-10-25 | 施耐德电器工业公司 | Electrical device for establishing or breaking a current in an electrical circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110202 |
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| CX01 | Expiry of patent term |