CN212365877U - Plastic case circuit breaker - Google Patents
Plastic case circuit breaker Download PDFInfo
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- CN212365877U CN212365877U CN202021938424.XU CN202021938424U CN212365877U CN 212365877 U CN212365877 U CN 212365877U CN 202021938424 U CN202021938424 U CN 202021938424U CN 212365877 U CN212365877 U CN 212365877U
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Abstract
The utility model relates to an electrical equipment technical field, concretely relates to moulded case circuit breaker. The utility model provides a molded case circuit breaker, which comprises a shell, a contact arc extinguishing system, an actuating mechanism and a measurement protection device; form first cavity, second cavity and third cavity in the casing, moulded case circuit breaker's annex is located in the first cavity, contact arc extinguishing system and actuating mechanism all locate in the second cavity, and it is internal that measurement protection device locates the third cavity, contact arc extinguishing system and measurement protection device set up in the cavity of difference, can keep apart electric arc and metal splash that contact arc extinguishing system break-make produced, avoid electric arc and metal splash to cause the damage to measurement protection device, the life of measuring protection device has been improved, the accuracy of guaranteeing to measure protection device signal detection, security and protect function's reliability.
Description
Technical Field
The utility model relates to a low-voltage electrical technology field, concretely relates to moulded case circuit breaker.
Background
In the field of low-voltage electrical, circuit breakers are used for breaking and connecting electrical currents, in particular for automatically breaking fault circuits.
The circuit breaker can effectively improve the use safety of electrical equipment, and is classified according to installation modes, including plug-in type, fixed type and drawer type. Low-voltage circuit breakers may generally include molded case circuit breakers and miniature circuit breakers. With the miniaturization development of electrical equipment, the plug-in miniature circuit breaker is widely applied to communication equipment due to the advantages of compact structure, space saving and convenient installation;
however, as the market continues to develop, more and more miniaturized electrical devices require molded case circuit breakers. As shown in fig. 1 and fig. 2, a single-break electronic molded case circuit breaker commonly available in the market at present includes an upper cover 11, a base 12, a contact arc extinguishing system, an actuating mechanism and a measurement protection device; the upper cover 11 is installed on the base 12, is equipped with the epitheca cavity in the upper cover 11, forms a base cavity between upper cover 11 and the base 12, and in auxiliary switch and alarm switch located the epitheca cavity, contact arc extinguishing system, actuating mechanism and measurement protection device all located and hold the intracavity, and distribute from left to right in the base cavity.
The whole length of the circuit breaker of above-mentioned structure is very long, unsatisfied narrow and small space's installation demand, and the moulded case circuit breaker's of current structure measurement protection device and contact arc extinguishing system all set up in base 12 simultaneously, and when the circuit breaker short circuit or transship, the flashover and the metal splash that contact arc extinguishing system disconnection produced splash backward, easily cause and measure the protect function inefficacy.
SUMMERY OF THE UTILITY MODEL
The utility model discloses (one) the technical problem that solve is: the measurement protection device, the contact arc extinguishing system and the actuating mechanism of the molded case circuit breaker with the existing structure are all arranged in the same cavity, the installation requirement that the whole length of the molded case circuit breaker is too large and cannot meet narrow space exists, and the measurement protection device is invalid due to sputtering of flashover or metal splashes.
(II) technical scheme
In order to solve the above technical problem, an embodiment of the present invention provides a molded case circuit breaker, including: the device comprises a shell, a contact arc extinguishing system, an actuating mechanism and a measurement protection device; a first cavity, a second cavity and a third cavity are formed in the shell, the contact arc extinguishing system and the executing mechanism are arranged in the second cavity, and the measurement protection device is arranged in the third cavity.
According to the utility model discloses an embodiment, first cavity, second cavity and third cavity set gradually from top to bottom.
According to an embodiment of the present invention, the housing includes an upper cover, a measuring protective shell and a base, and the upper cover, the base and the measuring protective shell are sequentially connected from top to bottom;
the first cavity is formed in the upper cover, the second cavity is formed between the upper cover and the base, and the third cavity is formed between the measuring protective shell and the bottom wall of the base.
According to the utility model discloses an embodiment, the base is upper end open structure, the bottom of base is equipped with the insulating layer, the insulating layer with base integrated into one piece.
According to the utility model discloses an embodiment, the casing includes upper cover and base, be equipped with in the upper cover first cavity, be equipped with the separate layer in the base, the upper cover with form between the separate layer the second cavity, the separate layer with form between the bottom of base the third cavity.
According to an embodiment of the invention, the separation layer is an insulating protective layer.
According to the utility model discloses an embodiment, the base is both ends open structure, the open end of base bottom is equipped with the insulation board.
According to the utility model discloses an embodiment, measure protection device includes the mutual-inductor, moulded case circuit breaker still includes the controller, the controller is located in the second cavity, the mutual-inductor is located in the third cavity.
According to the utility model discloses an embodiment, contact arc extinguishing system includes moving contact, static contact and explosion chamber, the moving contact with the junction of static contact is located in the explosion chamber.
According to an embodiment of the present invention, the molded case circuit breaker further includes a first main bus and a second main bus, one end of the first main bus is connected to the stationary contact, and the other end is connected to a power supply; one end of the second main bus is connected with the moving contact, and the other end of the second main bus is connected with an external load circuit; and the shell is provided with an arc spraying port communicated with the arc extinguishing chamber.
The utility model has the advantages that: the utility model provides a molded case circuit breaker, which comprises a shell, a contact arc extinguishing system, an actuating mechanism and a measurement protection device; form first cavity, second cavity and third cavity in the casing, moulded case circuit breaker's annex is located in the first cavity, contact arc extinguishing system and actuating mechanism all locate in the second cavity, and it is internal that measurement protection device locates the third cavity, contact arc extinguishing system and measurement protection device set up in the cavity of difference, can keep apart electric arc and metal splash that contact arc extinguishing system break-make produced, can avoid electric arc and metal splash to cause the damage to measuring protection device, the life of measuring protection device has been improved, the accuracy of measuring protection device signal detection is guaranteed, security and protect function's reliability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a perspective view of a molded case circuit breaker according to the related art;
fig. 2 is a sectional view of the molded case circuit breaker in the related art;
fig. 3 is a perspective view of the plastic case circuit breaker provided in the second embodiment of the present invention;
fig. 4 is a cross-sectional view of the molded case circuit breaker provided in the second embodiment of the present invention;
fig. 5 is a schematic view of the molded case circuit breaker provided in the second embodiment of the present invention;
fig. 6 is a perspective view of the molded case circuit breaker provided in the third embodiment of the present invention;
fig. 7 is a cross-sectional view of the molded case circuit breaker provided in the third embodiment of the present invention;
fig. 8 is a schematic diagram of the molded case circuit breaker provided in the third embodiment of the present invention.
Icon: 1-a shell; 11-upper cover; 111-middle cover; 112-face cover; 113-a first cavity; 114-a handle; 12-a base; 121-a second cavity; 1211-an arc extinguishing chamber; 1212-moving contact; 1213-stationary contact; 1214-an actuator; 1215-a transformer; 1216-a controller; 1217-flash barrier; 122-a separation layer; 123-an insulating layer; 124-an insulating plate; 13-measuring the protective shell; 131-a third cavity;
2-a first main bus; 3-second main bus.
Detailed Description
In order to make the above objects, features and advantages of the present invention more clearly understandable, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description, and the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example one
As shown in fig. 3 to 8, the present embodiment provides a molded case circuit breaker including: the device comprises a shell 1, a contact arc extinguishing system, an actuating mechanism 1214 and a measurement protection device; a first cavity 113, a second cavity 121 and a third cavity 131 are formed in the housing 1, the contact arc extinguishing system and the executing mechanism 1214 are arranged in the first cavity 113 and the second cavity 121, and the measurement protection device is arranged in the third cavity 131.
The utility model provides a molded case circuit breaker, which comprises a case 1, a contact arc extinguishing system, an actuating mechanism 1214 and a measurement protection device; form first cavity 113, second cavity 121 and third cavity 131 in the casing 1, contact arc extinguishing system and actuating mechanism 1214 all locate in second cavity 121, and measure in protection device locates third cavity 131, contact arc extinguishing system and measurement protection device set up in the cavity of difference, can keep apart electric arc and metal splash that contact arc extinguishing system break-make produced, can avoid electric arc and metal splash to cause the damage to measuring protection device, the life of measuring protection device has been improved, guarantee to measure the accuracy of protection device signal detection, security and protect function's reliability.
According to an embodiment of the present invention, as shown in fig. 5 and 8, the first cavity 113, the second cavity 121, and the third cavity 131 are sequentially disposed from top to bottom. The three cavities formed in the circuit breaker are sequentially arranged from top to bottom, a base 12 cavity is formed between the upper cover 11 and the base 12 in the prior art, the upper cover 11 cavity is formed in the upper cover 11, and the contact arc extinguishing system, the actuating mechanism 1214 and the measurement protection device are all arranged in the base 12 cavity and are sequentially distributed from left to right, so that the length of the base 12 in the prior art is larger, the installation of the circuit breaker can not be realized in a narrow space region, and in the embodiment, the first cavity 113, the second cavity 121 and the third cavity 131 are formed in the circuit breaker, the first cavity 113, the second cavity 121 and the third cavity 131 are sequentially arranged from top to bottom, only the contact arc extinguishing system and the actuating mechanism 1214 are arranged in the second cavity 121, so that the length of the base 12 is smaller compared with the prior art, the length of the circuit breaker and the area occupied by the circuit breaker in the installation direction are greatly reduced, the circuit breaker can be installed in a relatively narrow length area, and the application range of the circuit breaker is wider. As shown in fig. 3, 4, 6 and 7, since the portion of the circuit breaker facing the outside after being mounted is one end of the upper cover 11, the length of the base 12 corresponds to the length of the end cover, so that the area of the circuit breaker leaking to the outside is significantly reduced, and the appearance is more compact. Through experimental measurement, the length of base 12 (also be the length of circuit breaker) is greater than 165mm usually among the prior art, and the moulded case circuit breaker integrated level that this embodiment provided is higher, and length can reduce to below 120mm, has reduced the length of circuit breaker greatly, also can install in relatively narrow and small length region, and the application scope of circuit breaker is wider, and the appearance is more succinct simultaneously. Wherein the left-right direction in fig. 4 is indicated as the length of the base 12.
Example two
The embodiment provides a molded case circuit breaker as shown in fig. 3 to 6, which includes a case 1, a contact arc extinguishing system, an actuator 1214 and a measurement protection device; the shell 1 comprises an upper cover 11, a measuring protective shell 13 and a base 12, wherein the upper cover 11, the base 12 and the measuring protective shell 13 are sequentially connected from top to bottom; the first cavity 113 is formed in the upper cover 11, the second cavity 121 is formed between the upper cover 11 and the base, and the third cavity 131 is formed between the measuring protective shell 13 and the bottom wall of the base 12.
In this embodiment, as shown in fig. 3 to 6, the upper cover 11 includes a middle cover 111 and a surface cover 112, the surface cover 112 covers the middle cover 111, the first cavity 113 is formed between the surface cover 112 and the middle cover 111, the upper cover 11 is of an open-ended structure at a lower end, the base 12 is of an open-ended structure at an upper end, the upper cover 11 is connected to the open end of the base 12, the second cavity 121 is formed between the base 12 and the upper cover 11, the contact arc extinguishing system and the actuator 1214 are both disposed in the second cavity 121, the measurement protective housing 13 is of an open-ended structure at an upper end, the measurement protective housing 13 is connected to the bottom of the base 12, a third cavity 131 is formed between the bottom wall of the base 12 and the measurement protective housing 13, the measurement protective device is disposed in the third cavity 131, the contact arc extinguishing system and the measurement protective device are disposed in different cavities, and can isolate an arc and a metal spatter generated by the contact arc extinguishing system, the measuring protection device can be prevented from being damaged by electric arcs and metal splashes, the service life of the measuring protection device is prolonged, and the accuracy and the safety of signal detection of the measuring protection device and the reliability of a protection function are guaranteed.
In this embodiment, the surface cover 112 may be connected to the middle cover 111 of the upper cover 11 in a detachable manner such as a clamping manner or a screw connection manner, and the upper cover 11 may be connected to the base 12 in a connectable manner such as a clamping manner, an adhesive manner, a screw connection manner, or a riveting manner, so as to facilitate the detachment and installation between the upper cover 11 and the base 12, and the maintenance and replacement of the contact arc extinguishing system and the actuator 1214 in the second cavity 121 are more convenient. The measuring protection shell 13 and the base 12 can be detachably connected, such as clamped, bonded, screwed, riveted and the like, so that the measuring protection device between the protection shell 13 and the base 12 can be conveniently detached and installed, and the measuring protection device in the third cavity 131 can be more conveniently maintained and replaced.
As shown in fig. 4, in the present embodiment, the insulating layer 123 is disposed on the bottom of the base 12, and the insulating layer 123 can better prevent the arcing from entering the third cavity 131 from the second cavity 121, thereby further improving the capability of isolating the arcing and the metal spatters. Optionally, the insulating layer 123 is integrally formed with the base 12; namely, the insulating layer 123 is integrally formed on the side of the bottom of the base 12 facing the measurement protection case 13 by coating or the like.
As shown in fig. 4, the measurement and protection device includes a transformer 1215, the molded case circuit breaker further includes a controller 1216, the controller 1216 is disposed in the second cavity 121, and the transformer 1215 is disposed in the third cavity 131; the controller 1216 is correspondingly disposed on the upper side of the transformer 1215, the transformer 1215 is connected to the controller 1216, the circuit breaker is connected to a three-phase circuit, therefore, one transformer 1215 is disposed in each phase circuit, the transformer 1215 is used for detecting current in each phase circuit and transmitting a current signal to the controller 1216, the controller 1216 compares the current detected by the transformer 1215 with a preset current threshold, when the current detected by the transformer 1215 is greater than the preset current threshold, it is determined that a short circuit or an overload occurs, the controller 1216 sends a control signal to the actuator 1214, and the action of a release of the actuator 1214 is controlled to achieve a release function. The actuator 1214 is used for driving the movable contact 1212 to move, so as to connect and disconnect the movable contact 1212 and the stationary contact 1213. The actuator 1214 is provided with a release, the release comprises two electromagnets and a spring, and the electromagnetic release is connected with the protected circuit in series. When normal current passes through the circuit, the electromagnetic force generated by the electromagnet is smaller than the pulling force of the counterforce spring, the armature cannot be attracted by the electromagnet, and the circuit breaker normally operates. When a short-circuit fault occurs in the circuit, the current exceeds a plurality of times of the normal current, the electromagnetic force generated by the electromagnet is larger than the acting force of the counterforce spring, the armature is attracted by the electromagnet, the free tripping mechanism is pushed by the actuating mechanism 1214 to release the moving contact 1212, and the moving contact 1212 and the static contact 1213 break the circuit to play a short-circuit protection role.
As shown in fig. 4, the contact arc extinguishing system includes a moving contact 1212, a stationary contact 1213 and an arc-extinguishing chamber 1211, and a connection between the moving contact 1212 and the stationary contact 1213 is located in the arc-extinguishing chamber 1211; the moving contact 1212 and the static contact 1213 can generate electric arc and metal spatter when being contacted or disconnected, and the generated flashover is reduced or even eliminated by arranging the arc extinguish chamber 1211 in order to avoid the damage of the electric arc spatter or the metal spatter to the components in the second chamber and the shell 1; specifically, arc extinguishing grids and two insulating partition plates are arranged in the arc extinguishing chamber 1211, the two insulating partition plates are arranged in parallel, a plurality of arc extinguishing grids are arranged at intervals, two ends of each arc extinguishing grid are connected to the two insulating partition plates respectively to prevent short circuit between the arc extinguishing grids, the arc extinguishing grids are made of ferromagnetic materials, in an alternating-current low-voltage switch, when electric arcs are generated between contacts, the electric arcs are drawn into the arc extinguishing grids of the arc extinguishing chamber 1211 under the action of contraction force of magnetic force lines, the electric arcs are divided into a plurality of small sections (short arcs) in motion by the arc extinguishing grids, a cathode (near-pole effect) is formed on each small section of grid, and therefore the accumulation of multiple voltage drops enables the total voltage drop of the electric arcs to be insufficient to enable the power supply voltage to maintain electric arc combustion again, and the. Optionally, the arc extinguishing grid is a steel sheet, and under the same other conditions, the arc extinguishing time of the steel grid is shorter than that of other materials in all the ranges of current cut-off; of course, in the present embodiment, the arc chute plates may also be copper plates.
As shown in fig. 3 to 5, the molded case circuit breaker further includes a first main bus 2 and a second main bus 3, wherein one end of the first main bus 2 is connected to the stationary contact 1213, the other end is connected to a power supply, one end of the second main bus 3 is connected to the movable contact 1212, and the other end is connected to an external load circuit; the static contact 1213 is connected to a power supply terminal, and the moving contact 1212 is connected to a load terminal; optionally, one end of each of the first main bus 2 and the second main bus 3 passes through the third cavity 131 from the lower side of the circuit breaker and then is inserted into the second cavity 121, the first main bus 2 is connected to the fixed contact 1213, and the second main bus 3 is connected to the movable contact 1212; it will be understood that the second cavity 121 is not completely sealed from the third cavity 131, and when the first main bus bar 2 and the second main bus bar 3 are inserted into the second cavity 121, there may be a small gap between the second cavity 121 and the third cavity 131, but the gap does not cause flashover into the third cavity 131 to affect the measurement and protection device. The middle part of the transformer 1215 is a hollow mechanism, the second main bus 3 passes through the transformer 1215 to be inserted into the second cavity 121 to be connected with the moving contact 1212, the circuit breaker further comprises a handle 114, the handle 114 is positioned at the upper end of the upper cover 11, the handle 114 is connected with the executing mechanism 1214, and the moving contact 1213 can be switched on and off by pulling the handle 114.
As shown in fig. 4 and 7, an arc spraying opening communicated with the arc extinguishing chamber 1211 is formed in the housing 1, wherein an arc spraying area communicated with the outside is formed in an outer wall of one side of the base 12, the arc spraying area is of an opening structure, an arc barrier 1217 is arranged in the arc extinguishing chamber 1211 at a position corresponding to the opening, a through hole is formed in the arc barrier 1217, the through hole can be communicated with the outside and the arc extinguishing chamber 1211, an arc generated by opening and closing the moving contact 1212 and the static contact 1213 may not be completely extinguished after passing through the arc extinguishing chamber 1211 and becoming a small arc, the small arc is sprayed outwards from the arc spraying opening in the arc barrier 1217, the arc is cut and cooled when passing through the through hole, energy is consumed, the arc is further extinguished, and the arc barrier 1217 is arranged to prevent the arc from being sprayed too.
EXAMPLE III
The present embodiment is substantially the same as the second embodiment in technical solution, and the main difference is that a measurement protective housing 13 is not disposed on the circuit breaker, the housing 1 includes an upper cover 11 and a base 12, the upper cover 11 is disposed with the first cavity 113, the base 12 is disposed with a separation layer 122, the second cavity 121 is formed between the upper cover 11 and the separation layer 122, and the third cavity 131 is formed between the separation layer 122 and the bottom of the base 12. The separation layer 122 is an insulating layer 123.
As shown in fig. 7, the base 12 is a structure with two open ends, the upper cover 11 is a structure with an open upper end, the upper cover 11 is connected to the open end of the base 12, a separation layer 122 is disposed in the base 12, the second cavity 121 is formed between the separation layer 122 of the base 12 and the upper cover 11, the contact arc extinguishing system and the actuator 1214 are both disposed in the second cavity 121, the separation layer 122 is disposed in the base 12, the third cavity 131 is formed between the bottoms of the base 12, the measurement protection device is disposed in the third cavity 131, the contact arc extinguishing system and the measurement protection device are disposed in different cavities, so that the arc and the metal splashes generated by the on-off of the contact arc extinguishing system can be isolated, the measurement protection device can be prevented from being damaged by the arc and the metal splashes, the service life of the measurement protection device is prolonged, and the accuracy of signal detection of the measurement protection device is ensured, Security and reliability of protection functions.
Optionally, in this embodiment, an insulating plate 124 is disposed at the open end of the bottom of the base 12, and the separation layer 122 is an insulating protection layer, so that the arcing can be better prevented from entering the third cavity 131 from the second cavity 121 by the insulating protection layer, and the capability of isolating the arcing and the metal spatters is further improved.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A molded case circuit breaker, comprising: the device comprises a shell, a contact arc extinguishing system, an actuating mechanism and a measurement protection device; a first cavity, a second cavity and a third cavity are formed in the shell, the contact arc extinguishing system and the executing mechanism are arranged in the second cavity, and the measurement protection device is arranged in the third cavity.
2. A molded case circuit breaker according to claim 1, wherein the first chamber, the second chamber and the third chamber are sequentially arranged from top to bottom.
3. The molded case circuit breaker of claim 2, wherein the case comprises an upper cover, a measuring protective case and a base, and the upper cover, the base and the measuring protective case are sequentially connected from top to bottom;
the first cavity is formed in the upper cover, the second cavity is formed between the upper cover and the base, and the third cavity is formed between the measuring protective shell and the bottom wall of the base.
4. A molded case circuit breaker according to claim 3, wherein the base is of an open-top structure, and an insulating layer is provided on a bottom of the base, the insulating layer being integrally formed with the base.
5. A molded case circuit breaker according to claim 2, wherein the case includes an upper cover and a base, the upper cover having the first cavity therein, the base having a separation layer therein, the second cavity being formed between the upper cover and the separation layer, and the third cavity being formed between the separation layer and a bottom of the base.
6. A molded case circuit breaker according to claim 5, wherein said separation layer is an insulating protective layer.
7. A molded case circuit breaker according to claim 5, wherein the base is of a two-end open structure, and an insulating plate is provided at an open end of a bottom of the base.
8. A molded case circuit breaker according to any of claims 1 to 6, wherein the measurement protection device comprises a transformer, the molded case circuit breaker further comprising a controller, the controller being provided in the second cavity, the transformer being provided in the third cavity.
9. The molded case circuit breaker according to any one of claims 1 to 6, wherein the contact arc extinguishing system comprises a moving contact, a fixed contact and an arc extinguishing chamber, and a connection position of the moving contact and the fixed contact is located in the arc extinguishing chamber; the actuating mechanism is used for driving the moving contact to act so as to realize the connection and disconnection between the moving contact and the fixed contact.
10. A molded case circuit breaker according to claim 9, further comprising a first main bus bar and a second main bus bar, wherein one end of the first main bus bar is connected to the stationary contact, and the other end is connected to a power supply; one end of the second main bus is connected with the moving contact, and the other end of the second main bus is connected with an external load circuit; and the shell is provided with an arc spraying port communicated with the arc extinguishing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021938424.XU CN212365877U (en) | 2020-09-07 | 2020-09-07 | Plastic case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021938424.XU CN212365877U (en) | 2020-09-07 | 2020-09-07 | Plastic case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212365877U true CN212365877U (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021938424.XU Active CN212365877U (en) | 2020-09-07 | 2020-09-07 | Plastic case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212365877U (en) |
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2020
- 2020-09-07 CN CN202021938424.XU patent/CN212365877U/en active Active
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