CN102881536B - Conveniently detached arc-extinguishing system of moulded case circuit breaker - Google Patents
Conveniently detached arc-extinguishing system of moulded case circuit breaker Download PDFInfo
- Publication number
- CN102881536B CN102881536B CN201210396182.XA CN201210396182A CN102881536B CN 102881536 B CN102881536 B CN 102881536B CN 201210396182 A CN201210396182 A CN 201210396182A CN 102881536 B CN102881536 B CN 102881536B
- Authority
- CN
- China
- Prior art keywords
- arc
- extinguishing
- quenching system
- explosion chamber
- plastic casing
- 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.)
- Active
Links
Abstract
The invention relates to a conveniently detached arc-extinguishing system of a moulded case circuit breaker. The system is arranged in an insulating shell of the moulded case circuit breaker; an air vent is formed in the position, opposite to an outlet of the arc-extinguishing system, of the insulating shell. The arc-extinguishing system comprises a grating arc-extinguishing chamber and an arc-extinguishing chamber, wherein the grating arc-extinguishing chamber consists of an arc-extinguishing cover and an arc-extinguishing grid arranged in the arc-extinguishing cover and is provided with an arc outlet; the arc-extinguishing chamber is detachably arranged on an electric arcing passage between the arc outlet of the grating arc-extinguishing chamber and the air vent and comprises an arc-extinguishing chamber shell and an arc-extinguishing sheet arranged in the arc-extinguishing chamber shell; and at least one slide rail is arranged between the outer wall of the arc-extinguishing chamber shell and the inner wall of the electric arcing passage. Due to the adoption of the slide rail structure, the arc-extinguishing chamber is inserted into the electric arcing passage. The structure is similar to the drawing structure of a drawer, so that the arc-extinguishing chamber is convenient to detach.
Description
Technical field
The present invention relates to the structural design of breaker of plastic casing, specifically a kind of arc quenching system of easy-to-mount breaker of plastic casing, belongs to low-voltage electrical apparatus application.
Background technology
Existing circuit breaker, is comprised of operating system, arc quenching system, tripping mechanism, insulation crust, operating grip etc.On insulation crust, corresponding arc quenching system back-end location is provided with gas outlet, between gas outlet and arc quenching system, be provided with arcing passage, owing in use there being the larger fault current that cut-offs, the electric arc producing does not extinguish completely in arc quenching system, remaining electric arc is by arcing passage, overflow in gas outlet from insulation crust, the arcing that Here it is often says.Due to the existence of arcing, easily in the process of using circuit breaker, bring potential safety hazard.
In order to eliminate arcing, can in the arcing passage between arc quenching system and gas outlet, add the device that can further eliminate arcing, for example existing patent documentation CN 201084668Y discloses a kind of miniature circuit breaker with zero flashover arc extinguishing device, it arranges zero flashover arc extinguishing device in arcing passage, zero flashover arc extinguishing device by the filter arc sheet of multilayer apart from one another by and bending connect and compose, every metafiltration arc sheet surface is all densely covered with aperture, and on zero flashover arc extinguishing device, narrow meshed one end arranges with arcing direction is vertical.In technique scheme, circuit breaker is in disjunction, electric arc remaining part after arc quenching system arc extinguishing enters this zero flashover arc extinguishing device by arcing passage, filter arc sheet on zero passage flashover arc extinguishing device is cut apart cooling layer by layer, until extinguish completely, so that there is no obvious arcing in product outside, can improve fail safe and the reliability of product.Zero flashover arc extinguishing device in such scheme is arranged in the groove above arcing passage and prevents that its power of blowing that is blown out electric arc in arc-extinguish chamber from blowing away.Owing to being miniature circuit breaker, it is when practical application, do not need zero flashover arc extinguishing device to dismantle and can realize connection, therefore the zero flashover arc extinguishing device in above-mentioned miniature circuit breaker is arranged in the groove in arcing passage and fixes, insulation crust is installed, without it is dismantled.
And for breaker of plastic casing, the below of arcing passage arranges connecting groove, in wiring process, electric wire is then entered and in connecting groove, is realized wiring and operate by arcing passage after the wiring hole on plastic case breaker casing, so arcing channel bottom and connecting groove are UNICOMs.And if adopt in technique scheme, filter arc sheet apart from one another by and the zero flashover arc extinguishing device that connects and composes of bending, cannot be simple fix by being arranged on the groove realization of arcing passage top, need additional fixture, and for wiring easy to operate, need zero flashover arc extinguishing device easy disassembly, if additional fixture is realized fixing, when wiring, be inconvenient to again dismantle.
Summary of the invention
Technical problem to be solved by this invention is the fixing inconvenience of arc-control device additional in breaker of plastic casing of the prior art and is not easy to dismounting, thereby a kind of arc quenching system of the easy-to-mount breaker of plastic casing with explosion chamber for convenience detach is provided.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
An arc quenching system for easy-to-mount breaker of plastic casing, is arranged in breaker of plastic casing insulation crust, and the position that described insulation crust is relative with the outlet of described arc quenching system is provided with exhaust outlet, and described arc quenching system comprises:
Grating arc-extinguishing chamber, consists of arc-extinguish chamber and the arc extinguishing grid pieces being arranged in described arc-extinguish chamber, and described grating arc-extinguishing chamber has electric arc outlet;
Explosion chamber, is removable installed in the electric arc outlet and the arcing passage between described exhaust outlet of described grating arc-extinguishing chamber;
Described explosion chamber comprises the muffler of explosion chamber's housing and the portion that sets within it;
Between described explosion chamber housing outer wall and described arcing vias inner walls, be provided with at least one slide rail.
On at least one sidewall of described explosion chamber housing, form positioning convex strip, the described arcing vias inner walls position corresponding with described positioning convex strip forms the stopper slot coordinating with it.
On at least one sidewall of described explosion chamber housing, form location notch, the described arcing vias inner walls position corresponding with described location notch forms the spacing raised line coordinating with it.
The top of described explosion chamber housing is provided with positioning boss, and position corresponding with described positioning boss on described insulation crust forms the spacing hole being mated.
A plurality of steam vents of moulding on a described explosion chamber housing side cover plate relative with described exhaust outlet, export a relative side without cover plate with the electric arc of described grating arc-extinguishing chamber.
Described muffler is silk netting, described silk netting undulate.
Also comprise arc insulating cover, by integrated mutually perpendicular flash barrier and location-plate, formed;
Described location-plate is arranged between described explosion chamber case top and described insulation crust, is provided with positive stop lug boss on it;
Described positioning boss center is through hole, and described positive stop lug boss is through through hole and described spacing hole in the middle of described positioning boss.
Described flash barrier inner side forms longitudinal raised line, is provided with the longitudinal groove coordinating with described longitudinal raised line in the end of described insulation crust.
Described flash barrier exports relative position with the electric arc of described explosion chamber and is provided with out vent hole.
Technique scheme of the present invention compared with prior art at least has following beneficial effect:
(1) in arc quenching system of the present invention, explosion chamber comprises the muffler of explosion chamber's housing and the portion that sets within it; Between explosion chamber's housing outer wall and arcing vias inner walls, be provided with at least one slide rail.By rail structure is set, explosion chamber is inserted in arcing passage, this structure is similar to the drawing structure of drawer, facilitates the dismounting of explosion chamber.
(2) in arc quenching system of the present invention, provided the molding mode of two kinds of drawer-type structures, wherein at least one sidewall for explosion chamber's housing, form a positioning convex strip, the described arcing vias inner walls position corresponding with described positioning convex strip forms the stopper slot coordinating with it; Another kind is, at least one sidewall of described explosion chamber housing, forms location notch, and the described arcing vias inner walls position corresponding with described location notch forms the spacing raised line coordinating with it.Two kinds of concrete scheme Zhi Xu explosion chamber housings that more than provide and the insulation crust that forms arcing passage carry out simple Adjusting Shape, need not increase extra parts explosion chamber is installed, and structure is simpler, dismantles convenient.
(3) in arc quenching system of the present invention, the top of explosion chamber's housing is provided with positioning boss, and on insulation crust, the position corresponding with positioning boss forms the spacing hole being mated.By coordinating of spacing hole and positioning boss, explosion chamber is carried out further spacing, when the power of blowing in the electric arc exit of grating arc-extinguishing chamber is excessive, explosion chamber can keep good stability.
(4) in arc quenching system of the present invention, also further comprise arc insulating cover, by integrated mutually perpendicular flash barrier and location-plate, formed; Location-plate is arranged between explosion chamber's case top and insulation crust, is provided with positive stop lug boss on it; Positioning boss center is through hole, and positive stop lug boss, through through hole and spacing hole in the middle of positioning boss, is realized the location to arc insulating cover; And flash barrier inner side forms longitudinal raised line, in the end of insulation crust, be provided with the longitudinal groove coordinating with longitudinal raised line.Longitudinally raised line inserts in the process of longitudinal groove from top to bottom, positive stop lug boss enters through hole and the spacing hole in the middle of corresponding with it positioning boss, and explosion chamber is fixed, and by above-mentioned rational design, cleverly these parts is combined, rational in infrastructure, there is good practicality.
(5) in arc quenching system of the present invention, owing to also having set up flash barrier and can further stop the charged ion of " fleeing from " from explosion chamber excessive and then guarantee that from the insulation crust of breaker of plastic casing charged ion out does not impact being arranged on the electric elements of breaker of plastic casing periphery in the outside in explosion chamber.
Accompanying drawing explanation
For content of the present invention is more likely to be clearly understood, below in conjunction with accompanying drawing, the present invention is further detailed explanation, wherein,
Fig. 1 is the structural representation of an embodiment of arc quenching system of the present invention;
Fig. 2 is the position relationship schematic diagram of explosion chamber of the present invention and grating arc-extinguishing chamber;
Fig. 3 is the perspective view of explosion chamber of the present invention;
Fig. 4 is the perspective view of muffler of the present invention;
Fig. 5 is the perspective view of insulation shell of the present invention;
Fig. 6 is the position relationship schematic diagram of another angle of explosion chamber of the present invention and grating arc-extinguishing chamber;
Fig. 7 is the perspective view at a visual angle of arc insulating cover of the present invention;
Fig. 8 is the perspective view at another visual angle of arc insulating cover of the present invention;
Reference numeral is wherein: 1-grating arc-extinguishing chamber, 11-arc-extinguish chamber, 12-arc extinguishing grid pieces, 2-explosion chamber, 21-explosion chamber housing, 23-muffler, 24-steam vent, 25-positioning boss, 26-positioning convex strip, 3-contact system, 31-fixed contact, 32-moving contact, 4-insulation crust, 42-spacing hole, 43-longitudinal groove, 44-stopper slot, 6-arc insulating cover, 61-flash barrier, 62-location-plate, the longitudinal raised line of 63-, 64-positive stop lug boss, 65-goes out vent hole.
Embodiment
embodiment 1
The present embodiment provides a kind of arc quenching system of easy-to-mount breaker of plastic casing, as shown in Figure 1, described arc quenching system is arranged in breaker of plastic casing insulation crust 4, the position that described insulation crust 4 is relative with the outlet of described arc quenching system is provided with exhaust outlet, described arc quenching system comprises grating arc-extinguishing chamber 1, in conjunction with known shown in Fig. 1 and Fig. 2, described grating arc-extinguishing chamber 1 consists of arc-extinguish chamber 11 and the arc extinguishing grid pieces 12 being arranged in described arc-extinguish chamber 11, and described grating arc-extinguishing chamber 1 has electric arc outlet.As can be seen from Figure 2, contact system 3 comprises fixed contact 31 and moving contact 32, the contact point of described moving contact 32 and described fixed contact 31 is in described grating arc-extinguishing chamber 1, when described moving contact 32 is scolded out with described fixed contact 31, produce electric arc, electric arc cuts off after arc extinguishing through described arc extinguishing grid pieces 12, from the electric arc outlet of described grating arc-extinguishing chamber 1, overflows.
Described arc quenching system also comprises, explosion chamber 2 is removable installed in the electric arc outlet and the arcing passage between described exhaust outlet of described grating arc-extinguishing chamber 1; In conjunction with Fig. 3, described explosion chamber 2 comprises the muffler 23 of explosion chamber's housing 21 and the portion that sets within it; Between described explosion chamber housing 21 outer walls and described arcing vias inner walls, be provided with at least one slide rail, by rail structure is set, explosion chamber be inserted in arcing passage, this structure is similar to the drawing structure of drawer, facilitates the dismounting of explosion chamber.
As can be seen from Figure 3, drawer-type structure in the present embodiment is realized by following structure: at least one sidewall of described explosion chamber housing 21, form positioning convex strip 26, the described arcing vias inner walls position corresponding with described positioning convex strip 26 forms the stopper slot 44 coordinating with it.Or at least one sidewall of described explosion chamber housing 21, form location notch, the described arcing vias inner walls position corresponding with described location notch forms the spacing raised line coordinating with it; Two kinds of concrete scheme Zhi Xu explosion chamber housings that more than provide and the insulation crust that forms arcing passage carry out simple Adjusting Shape, need not increase extra parts explosion chamber is installed, and structure is simpler, dismantles convenient.
Fig. 4 has provided the structural representation of described muffler 23, and described muffler 23 is silk netting, described silk netting undulate.
As preferred embodiment, as Fig. 3 and Fig. 5, the top of described explosion chamber housing 21 is provided with positioning boss 25, and position corresponding with described positioning boss 25 on described insulation crust 4 forms the spacing hole 42 being mated.
More preferably, as shown in Figure 6, a plurality of steam vents 24 of moulding on described explosion chamber housing 21 side cover plate relative with described exhaust outlet, export a relative side without cover plate with the electric arc of described grating arc-extinguishing chamber 1.So can be so that flying fox be isolated more fully absorption in explosion chamber.
embodiment 2
The present embodiment improves as follows on the basis of embodiment 1, shown in Fig. 1, also comprise arc insulating cover 6, described arc insulating cover 6 consists of integrated mutually perpendicular flash barrier 61 and location-plate 62, see Fig. 7 and Fig. 8, described location-plate 62 is arranged between housing 21 tops, described explosion chamber and described insulation crust 4, is provided with positive stop lug boss 64 on it; Described positioning boss 25 centers are through hole, and described positive stop lug boss 64 is through through hole and described spacing hole 42 in the middle of described positioning boss 25.Described flash barrier 61 inner sides form longitudinal raised line 63, are provided with the longitudinal groove 43 coordinating with described longitudinal raised line 63 in the end of described insulation crust 4.Described flash barrier 61 exports relative position with the electric arc of described explosion chamber 2 and is provided with out vent hole 65.Described longitudinal raised line 63 inserts in the process of described longitudinal groove 43 from top to bottom, described positive stop lug boss 64 enters through hole and the described spacing hole 42 in the middle of corresponding with it described positioning boss 25, described explosion chamber 2 is fixed, by above-mentioned rational design, cleverly these parts are combined, rational in infrastructure, there is good practicality.
And, owing to also having set up flash barrier and can further stop the charged ion of " fleeing from " from explosion chamber excessive and then guarantee that from the insulation crust of breaker of plastic casing charged ion out does not impact being arranged on the electric elements of breaker of plastic casing periphery in the outside in explosion chamber.
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 exhaustive without also giving all execution modes.And the apparent variation of being extended out thus or change are still among the protection range in the invention.
Claims (9)
1. an arc quenching system for easy-to-mount breaker of plastic casing, is arranged in breaker of plastic casing insulation crust (4), and the position that described insulation crust (4) is relative with the outlet of described arc quenching system is provided with exhaust outlet, and described arc quenching system comprises:
Grating arc-extinguishing chamber (1), consists of arc-extinguish chamber (11) and the arc extinguishing grid pieces (12) that is arranged in described arc-extinguish chamber (11), and described grating arc-extinguishing chamber (1) has electric arc outlet;
Explosion chamber (2), is removable installed in the electric arc outlet and the arcing passage between described exhaust outlet of described grating arc-extinguishing chamber (1);
It is characterized in that:
Described explosion chamber (2) comprises the muffler (23) of explosion chamber's housing (21) and the portion that sets within it;
Between described explosion chamber housing (21) outer wall and described arcing vias inner walls, be provided with at least one slide rail.
2. the arc quenching system of easy-to-mount breaker of plastic casing according to claim 1, is characterized in that:
On at least one sidewall of described explosion chamber housing (21), form positioning convex strip (26), the described arcing vias inner walls position corresponding with described positioning convex strip (26) forms the stopper slot (44) coordinating with it.
3. the arc quenching system of easy-to-mount breaker of plastic casing according to claim 1, is characterized in that:
On at least one sidewall of described explosion chamber housing (21), form location notch, the described arcing vias inner walls position corresponding with described location notch forms the spacing raised line coordinating with it.
4. according to the arc quenching system of the arbitrary described easy-to-mount breaker of plastic casing of claim 1-3, it is characterized in that:
The top of described explosion chamber housing (21) is provided with positioning boss (25), and the upper position corresponding with described positioning boss (25) of described insulation crust (4) forms the spacing hole (42) being mated.
5. the arc quenching system of easy-to-mount breaker of plastic casing according to claim 4, is characterized in that:
A plurality of steam vents of moulding (24) on described explosion chamber housing (21) side cover plate relative with described exhaust outlet, export a relative side without cover plate with the electric arc of described grating arc-extinguishing chamber (1).
6. the arc quenching system of easy-to-mount breaker of plastic casing according to claim 5, is characterized in that:
Described muffler (23) is silk netting, described silk netting undulate.
7. according to the arc quenching system of the easy-to-mount breaker of plastic casing described in claim 5 or 6, it is characterized in that:
Also comprise
Arc insulating cover (6), consists of integrated mutually perpendicular flash barrier (61) and location-plate (62);
Described location-plate (62) is arranged on described insulation crust (4), is provided with positive stop lug boss (64) on it;
Described positioning boss (25) center is through hole, and described positive stop lug boss (64) is through through hole and described spacing hole (42) in the middle of described positioning boss (25).
8. the arc quenching system of easy-to-mount breaker of plastic casing according to claim 7, is characterized in that:
Described flash barrier (61) inner side forms longitudinal raised line (63), is provided with the longitudinal groove (43) coordinating with described longitudinal raised line (63) in the end of described insulation crust (4).
9. the arc quenching system of easy-to-mount breaker of plastic casing according to claim 8, is characterized in that:
Described flash barrier (61) exports relative position with the electric arc of described explosion chamber (2) and is provided with out vent hole (65).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210396182.XA CN102881536B (en) | 2012-10-18 | 2012-10-18 | Conveniently detached arc-extinguishing system of moulded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210396182.XA CN102881536B (en) | 2012-10-18 | 2012-10-18 | Conveniently detached arc-extinguishing system of moulded case circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102881536A CN102881536A (en) | 2013-01-16 |
| CN102881536B true CN102881536B (en) | 2014-10-15 |
Family
ID=47482823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210396182.XA Active CN102881536B (en) | 2012-10-18 | 2012-10-18 | Conveniently detached arc-extinguishing system of moulded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102881536B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104027A (en) * | 2017-05-08 | 2017-08-29 | 天津市百利电气有限公司 | The external hanging type of low-voltage moulded case circuit breaker disappears free arc-control device |
| CN112820604A (en) * | 2021-02-07 | 2021-05-18 | 浙江世隆电气科技有限公司 | Zero-flashover molded case circuit breaker |
| CN113745073A (en) * | 2021-09-03 | 2021-12-03 | 巨邦集团有限公司 | Molded case circuit breaker with zero flashover device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3541514A1 (en) * | 1985-11-21 | 1987-05-27 | Siemens Ag | Arc extinguishing chamber having an attachment for further cooling of emerging gases |
| CN2197742Y (en) * | 1994-08-17 | 1995-05-17 | 南寅 | Anti-arc spraying breaker |
| CN1443358A (en) * | 2000-07-18 | 2003-09-17 | 西门子公司 | Arc extinguisher with attachment for low voltage switchgear |
| CN201084668Y (en) * | 2007-09-13 | 2008-07-09 | 天正集团有限公司 | A small-sized circuit breaker with a zero-flashover arc-extinguishing device |
| CN102315047A (en) * | 2010-06-30 | 2012-01-11 | 北京翠祥电器元件有限公司 | Flashover preventing device for circuit breaker |
| CN202796810U (en) * | 2012-10-18 | 2013-03-13 | 浙江天正电气股份有限公司 | Moulded case circuit breaker arc extinguishing system convenient for assembly and disassembly |
-
2012
- 2012-10-18 CN CN201210396182.XA patent/CN102881536B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3541514A1 (en) * | 1985-11-21 | 1987-05-27 | Siemens Ag | Arc extinguishing chamber having an attachment for further cooling of emerging gases |
| CN2197742Y (en) * | 1994-08-17 | 1995-05-17 | 南寅 | Anti-arc spraying breaker |
| CN1443358A (en) * | 2000-07-18 | 2003-09-17 | 西门子公司 | Arc extinguisher with attachment for low voltage switchgear |
| CN201084668Y (en) * | 2007-09-13 | 2008-07-09 | 天正集团有限公司 | A small-sized circuit breaker with a zero-flashover arc-extinguishing device |
| CN102315047A (en) * | 2010-06-30 | 2012-01-11 | 北京翠祥电器元件有限公司 | Flashover preventing device for circuit breaker |
| CN202796810U (en) * | 2012-10-18 | 2013-03-13 | 浙江天正电气股份有限公司 | Moulded case circuit breaker arc extinguishing system convenient for assembly and disassembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102881536A (en) | 2013-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202796810U (en) | Moulded case circuit breaker arc extinguishing system convenient for assembly and disassembly | |
| CN102881536B (en) | Conveniently detached arc-extinguishing system of moulded case circuit breaker | |
| CN102447227B (en) | Double-pole dry air or nitrogen insulated metal closed switch cabinet for high-speed railway | |
| CN113270302A (en) | Novel arc extinguishing device of circuit breaker | |
| WO2017080314A1 (en) | Arc extinguish chamber of air circuit breaker | |
| CN104252982B (en) | Arc-chutes for electric protective equipment and the electric protective equipment including the room | |
| CN105280449A (en) | Breaker | |
| CN207124409U (en) | A kind of side bus extends Cubicle Gas-Insulated Switchgear | |
| CN204348640U (en) | Residual current action breaker | |
| CN204792659U (en) | Miniature circuit breaker N looks striking arc control device | |
| CN205231001U (en) | Miniature circuit breaker's neutral pole striking mechanism | |
| CN111048370B (en) | High-segmentation arc extinguish chamber for circuit breaker | |
| CN208674036U (en) | A kind of arc-chutes for residual current circuit breaker | |
| CN103021755A (en) | Molded case circuit breaker with short flashover device and high arc extinction effect | |
| WO2017206580A1 (en) | Miniature circuit breaker | |
| CN203589477U (en) | Electric control cabinet miniature bus chamber cover board and electric control cabinet | |
| CN209071237U (en) | The terminal cover of breaker | |
| CN201112307Y (en) | Quenching chamber of circuit breaker | |
| CN203277147U (en) | Mold case circuit breaker and arc extinguishing device thereof | |
| CN107993905B (en) | Circuit breaker | |
| CN105207108A (en) | Ventilating and heat-dissipating power distribution cabinet | |
| CN216250611U (en) | Internal gas shunting structure of miniature circuit breaker | |
| CN219716700U (en) | Simple assembly type arc extinguishing chamber | |
| CN204632478U (en) | For insulating sleeve and the compressor of compressor | |
| CN218769348U (en) | Moulded case circuit breaker with good insulation performance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |