CN110010418B - Plastic case circuit breaker with frame circuit breaker characteristics - Google Patents
Plastic case circuit breaker with frame circuit breaker characteristics Download PDFInfo
- Publication number
- CN110010418B CN110010418B CN201910256061.7A CN201910256061A CN110010418B CN 110010418 B CN110010418 B CN 110010418B CN 201910256061 A CN201910256061 A CN 201910256061A CN 110010418 B CN110010418 B CN 110010418B
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- plug
- circuit breaker
- mounting table
- board
- wiring
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- 238000009434 installation Methods 0.000 claims abstract description 54
- 238000004146 energy storage Methods 0.000 claims description 9
- 210000001503 joint Anatomy 0.000 claims description 7
- 239000002184 metal Substances 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
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
- H01H71/02—Housings; Casings; Bases; Mountings
-
- 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
Landscapes
- Breakers (AREA)
Abstract
The invention provides a molded case circuit breaker with the characteristics of a frame circuit breaker, which has the advantages of small size, light weight and compact structure, and simultaneously has the advantages of high short-circuit breaking capacity and short-time withstand current of the frame circuit breaker. The circuit breaker is optimized by removing a metal shell or a drawer seat, adopting a plastic shell, adopting a hanging type installation mode, adopting a fixed installation mode or a plug-in installation mode through a plug-in installation table, adopting a board front wiring mode generally during the fixed installation, and adopting a board front wiring mode or a board rear wiring mode during the plug-in installation. Therefore, the circuit breaker has the characteristics of a molded case circuit breaker; meanwhile, the body of the circuit breaker is a frame circuit breaker, so that the circuit breaker has the advantages of high short-circuit breaking capacity and high short-time withstand current.
Description
Technical Field
The invention relates to a circuit breaker, in particular to a high-capacity molded case circuit breaker which is applicable to alternating current and direct current power systems.
Background
A circuit breaker is a switching device capable of closing, carrying and breaking a current under normal circuit conditions and capable of closing, carrying and breaking a fault current under abnormal circuit conditions for a prescribed time. The circuit breaker generally comprises a contact system, an arc extinguishing system, an operating mechanism, a release, a plastic shell and the like, and is divided into a frame type circuit breaker (also called an universal circuit breaker) and a plastic shell type circuit breaker according to the structure.
The frame-type circuit breaker is divided into a fixed type and a drawer-type circuit breaker according to an installation wiring mode, and for the fixed type frame-type circuit breaker, a circuit breaker body (comprising a plastic shell, a contact system, an arc extinguishing system, an operating mechanism, a release and the like) is fixed on a metal bracket, and is fixed on a horizontal installation plate (or a horizontal installation frame) when in use, and the external size of the frame-type circuit breaker is smaller than that of the drawer-type circuit breaker; the drawer type frame circuit breaker installs circuit breaker body 1 in drawer seat 2, as shown in fig. 1, and accessible shakes into the mechanism with circuit breaker body 1 and shakes into or shake out drawer seat 2, the maintenance and the test of circuit breaker of being convenient for, but drawer type circuit breaker is bulky, and the weight is heavy, and to high-capacity drawer type circuit breaker, the weight of its drawer seat 2 is even equivalent with the weight of circuit breaker body 1. Therefore, the frame type circuit breaker has the advantages of high short-circuit breaking capacity and short-time withstand current, but has large overall size and heavy weight.
The plastic shell circuit breaker uses the plastic insulator as the shell of the circuit breaker, and the contact, the arc extinguishing chamber, the release, the operating system and the like are all arranged in the plastic shell, so that interphase insulation and isolation from the conductor are easy to realize. The molded case circuit breaker has the characteristics of compact structure, small volume, light weight and the like, but has low capability of bearing short-circuit current and lower intelligent degree than a frame-type circuit breaker, and is often used for small-capacity circuits with rated currents below 630A.
Disclosure of Invention
In view of the above, the invention provides a molded case circuit breaker with the characteristics of a frame circuit breaker, which has the advantages of small size, light weight and compact structure, and simultaneously has the advantages of high short-circuit breaking capacity and short-time withstand current of the frame circuit breaker.
The invention provides a molded case circuit breaker with frame type circuit breaker characteristics, comprising: the fixed breaker comprises a fixed breaker body, a fixed board front wiring row and an insulating rear cover board;
The structure of fixed circuit breaker body is the same with frame-type circuit breaker body structure, includes: the electric energy storage device comprises a plastic shell, a contact system and an arc extinguishing system which are arranged in the plastic shell, and an electronic release, an operating mechanism and an electric energy storage mechanism which are arranged on the front end face of the plastic shell;
a fixed plate front wiring row is arranged on the rear end face of the plastic shell, and the input end and the output end of the fixed plate front wiring row are respectively led out to the upper part and the lower part of the plastic shell;
an insulating back cover plate is arranged on the back end surface of the plastic shell.
The molded case circuit breaker is installed in a hanging mode, and the insulating back cover plate is used as a hanging installation piece.
In addition, the present invention provides another molded case circuit breaker having the characteristics of a frame circuit breaker, comprising: the plug-in circuit breaker comprises a plug-in circuit breaker body, an insulating rear cover plate and a plug-in mounting table;
The structure of the plug-in circuit breaker body is the same as that of the frame-type circuit breaker body, and the plug-in circuit breaker comprises: the device comprises a plastic shell, a contact system and an arc extinguishing system which are arranged in the plastic shell, an electronic release, an operating handle and an electric energy storage mechanism which are arranged on the front end face of the plastic shell;
an insulating rear cover plate is arranged on the rear end face of the plastic shell;
The wire outlet end of the plug-in circuit breaker body is a plane plug extending out of the insulating rear cover plate;
a wiring row is arranged at a position corresponding to the plane plug on the plug-in mounting table;
The plug-in mounting table is in butt joint with the rear end face of the plug-in circuit breaker body, so that the wiring row is connected and conducted with the plane plug, and the plug-in mounting table is detachably connected with the plug-in circuit breaker body.
The plug-in type installation table is a plug-in type board rear wiring installation table, the butt joint surface of the plug-in type board rear wiring installation table and the plug-in type breaker body is the front end surface of the plug-in type board rear wiring installation table, a plug-in type board rear wiring row is arranged at the position, corresponding to the plane plug, of the rear end surface of the plug-in type board rear wiring installation table, and the plane plug on the plug-in type breaker body is connected and conducted with the plug-in type board rear wiring row of the rear end surface of the plug-in type board rear wiring installation table through a jack on the plug-in type board rear wiring installation table.
The plug-in type panel front wiring installation platform is a plug-in type panel front wiring installation platform, the butt joint surface of the plug-in type panel front wiring installation platform and the plug-in type breaker body is the front end surface of the plug-in type panel front wiring installation platform, a plug-in type panel front wiring row is arranged on the front end surface of the plug-in type panel front wiring installation platform, and the input end and the output end of the plug-in type panel front wiring row are led out to the upper part and the lower part of the plug-in type panel front wiring installation platform respectively; the plane plug on the plug-in circuit breaker body is directly connected and conducted with the plug-in board front wiring row of the front end face of the plug-in board front wiring installation table.
The beneficial effects are that:
The circuit breaker optimizes the 1600A frame type circuit breaker, removes a metal bracket and a drawer seat, adopts a suspension type installation mode, designs two installation modes of fixed installation and plug-in installation through a plug-in installation table, generally adopts a board front wiring mode during fixed installation, and can adopt a board front wiring mode or a board rear wiring mode during plug-in installation. Therefore, the invention has the characteristics of the molded case circuit breaker; meanwhile, the body of the circuit breaker is a frame circuit breaker, an electronic release of the frame circuit breaker is adopted, and the self-powered energy storage mechanism is provided with an operating mechanism, a contact system and an arc extinguishing system of the frame circuit breaker, so that the circuit breaker has the advantages of high short-circuit breaking capacity and short-time withstand current. The circuit breaker with the structure has better maintenance performance, but reduces the volume and weight compared with a frame circuit breaker.
Drawings
Fig. 1 is a schematic structural view of a conventional frame-type circuit breaker body and a drawer base;
fig. 2 is a schematic diagram of a molded case circuit breaker for front wiring of a stationary mounting plate in embodiment 1;
Fig. 3 is a schematic diagram of a molded case circuit breaker for rear wiring of the plug-in mounting board in embodiment 2;
Fig. 4 is a schematic diagram of a molded case circuit breaker for front wiring of a plug-in mounting board in embodiment 3;
fig. 5 is a schematic diagram showing a drawer base of a conventional frame-type circuit breaker and a plug-in mounting table of example 2 in comparison.
Wherein: 1-frame circuit breaker body, 2-drawer base, 3-plastic housing, 4-electronic trip, 5-operating handle, 6-electric energy storage mechanism, 7-stationary front panel wiring block, 8-plug-in circuit breaker body, 9-plug-in rear panel wiring block, 10-plug-in rear panel wiring block, 11-plug-in front panel wiring block, 12-plug-in front panel wiring block
Detailed Description
The invention will now be described in detail by way of example with reference to the accompanying drawings.
Example 1:
The embodiment provides a moulded case circuit breaker with frame circuit breaker characteristics, and this circuit breaker is the circuit breaker of wiring before the fixed mounting panel, has integrated moulded case circuit breaker and frame circuit breaker's advantage, and this moulded case circuit breaker is applicable to the improvement to the frame circuit breaker below 1600A.
The circuit breaker has a plastic housing, adopts a fixed installation and board front wiring mode, as shown in fig. 2, and specifically comprises: fixed circuit breaker body, wiring row 7 and insulating back shroud before the fixed board, fixed circuit breaker body includes: the plastic shell 3, the contact system and the arc extinguishing system which are arranged in the plastic shell 3, and the electronic trip 4, the operating mechanism 5 and the electric energy storage mechanism 6 which are arranged on the front end surface of the plastic shell 3 are the same as the body of the fixed frame circuit breaker in structure and arrangement. The fixed board front wiring row 7 of the circuit breaker of the example is arranged at the back (rear end face) of the plastic shell 3, the input end and the output end are respectively led out to the upper part and the lower part, and an insulating rear cover board is covered on the back of the fixed circuit breaker body and is used as a mounting surface of the circuit breaker. When the fixed circuit breaker is installed, the insulating back cover plate is directly hung and installed on the component installation plate of the power distribution cabinet through bolts.
The breaker is different from the original frame type breaker in that:
(1) Replacing the metal brackets at two sides of the original frame-type circuit breaker with an insulating back cover plate at the back of the fixed circuit breaker body; the installation mode is changed from desk installation to wall-mounted installation;
(2) The back outgoing line of the drawer seat of the original frame type circuit breaker is changed into a plate front outgoing line which is fixedly installed (a front wiring mode of a fixed installation plate).
Example 2:
On the basis of the embodiment 1, in order to facilitate maintenance and replacement of the circuit breaker, a circuit breaker of a plug-in installation mode is provided. The plug-in circuit breaker has two wiring modes: front wiring of the plug-in mounting board (as shown in fig. 4) and rear wiring of the plug-in mounting board (as shown in fig. 3). In this embodiment, the plug-in board rear connection is configured, and thus the plug-in board rear connection mounting table 9 is provided. Thus, the molded case circuit breaker in the present embodiment includes: a plug-in circuit breaker body 8 and a plug-in board rear wiring mounting station 9.
As shown in fig. 3, the structure of the plug-in board rear wiring breaker is that the front surface of the plug-in board rear wiring installation table 9 is in butt joint with the back of the plug-in board rear wiring installation table 8, the plug-in board rear wiring installation table 9 is provided with a pin shaft on the butt joint surface, and the plug-in board rear wiring installation table 9 is provided with the plug-in board rear wiring installation table 8 by inserting the pin shaft into a pin hole on the plug-in board rear wiring breaker body; the breaker body 8 and the plug-in board rear wiring mounting table 9 are then connected by fixing screws.
The overall structure of the plug-in circuit breaker body 8 is similar to that of the fixed circuit breaker body in embodiment 1, and specifically includes: the circuit breaker comprises a plastic shell 3, a contact system and an arc extinguishing system which are arranged in the plastic shell 3, an electronic release 4, an operating mechanism 5 and an electric energy storage mechanism 6 which are arranged on the front end surface of the plastic shell 3, wherein the back of a plug-in circuit breaker body 8 is a circuit breaker outlet end which is designed as a plane plug with a convex back; the back of the plug-in breaker body 8 is covered with an insulating back cover plate, which is used as a back plate of the plug-in breaker body 8, and the plane plug extends out of the insulating back cover plate.
The rear surface of the plug-in board rear wiring installation table 9 is provided with a plug-in board rear wiring row 10 at a position corresponding to the planar plug, and the planar plug on the plastic shell 3 is matched with the plug-in board rear wiring row 10 at the rear surface of the plug-in board rear wiring installation table 9 through a jack on the plug-in board rear wiring installation table 9 and is connected and conducted through a bolt.
The installation wiring steps of the plug-in circuit breaker are as follows:
(1) Firstly, mounting the plug-in board rear wiring mounting table 9 on a component mounting plate of a distribution board to finish the mounting of the plug-in mounting table;
(2) Wiring the plug-in board rear wiring row 10 on the plug-in board rear wiring mounting table 9 with the main circuit;
(3) Docking the plug-in circuit breaker body 8 with the plug-in board rear wiring installation table 9, so that a pin shaft on the plug-in board rear wiring installation table 9 is inserted into a pin hole on the plug-in circuit breaker body 8; and tightening the fixing screw between the plug-in circuit breaker body 8 and the plug-in board rear wiring mounting table 9;
(4) And (3) screwing up a connecting nut between the plane plug of the plug-in circuit breaker body 8 and the plug-in mounting table wiring row 10 to complete the connection of the main circuit of the circuit breaker.
When the plug-in breaker body 8 needs to be replaced, the plug-in breaker body can be directly replaced without disassembling a wiring row or even cutting off an upper power supply, and the specific steps are as follows:
(1) Disconnecting the breaker to be replaced, and cutting off a load power supply;
(2) Unscrewing the connection nut between the planar plug of the plug-in circuit breaker body 8 and the plug-in mounting table wiring block 10;
(3) Unscrewing the fixing screw between the plug-in circuit breaker body 8 and the plug-in board rear wiring mounting table 9;
(4) Taking down the plug-in breaker body 8 from the plug-in board rear wiring installation table 9, and then butting the replaced new plug-in breaker body 8 with the plug-in board rear wiring installation table 9;
(5) The fixing screw between the plug-in circuit breaker body 8 and the plug-in board rear wiring installation table 9 is screwed down in sequence, and the connecting nut between the plane plug of the plug-in circuit breaker body 8 and the plug-in board rear wiring row 10 is screwed down in sequence;
(6) And closing the circuit breaker to finish replacement of the plug-in circuit breaker body.
Example 3:
The difference from the above embodiment 2 is that the plug-in circuit breaker in this embodiment adopts a plug-in mounting board front wiring mode, that is, the molded case circuit breaker in this embodiment includes: a plug-in circuit breaker body 8 and a plug-in board front wiring mounting block 11.
The structure of the plug-in circuit breaker body 8 is the same as that of the plug-in circuit breaker body in the above embodiment 2, and only the difference is that the plug-in mounting table is a plug-in board front wiring mounting table 11 in this example, as shown in fig. 4, and wiring rows are provided at the upper and lower ends of the front end face of the plug-in board front wiring mounting table 11 to form plug-in board front wiring rows 12. The back of the plastic shell 3 is an outlet end of the plug-in circuit breaker body 8, the outlet end is designed as a plane plug with a convex back, the back of the plug-in circuit breaker body 8 is covered with an insulating back cover plate, and the plane plug extends out of the insulating back cover plate as a back plate of the plug-in circuit breaker body 8.
The plane plug on the plastic shell 3 is matched with the front wiring row 12 of the plug-in board on the front end surface of the front wiring installation table 11 of the plug-in board, and is connected and conducted through a connecting nut.
In the above-described embodiments 2 and 3, the frame-type circuit breaker drawer base 2 having a large size and a heavy weight is replaced with a small-sized and light-weight plug-in mounting table (plug-in board rear wiring mounting table 9 or plug-in board front wiring mounting table 11), the external shape of which is shown in fig. 5, and the plug-in board rear wiring mounting table 9 or the plug-in board front wiring mounting table 11 can be used as a suspension mounting surface to mount the circuit breaker in a suspension manner. The volume of the plug-in circuit breaker in the structure is reduced to 64% of that of the drawer type circuit breaker, and the weight is reduced to 51% of that of the drawer type circuit breaker.
The circuit breaker adopting the above-described structures of embodiment 1 to embodiment 3 may be used for an ac circuit breaker as well as a dc circuit breaker.
The weight and volume of the fixed molded case circuit breaker provided in the above embodiment 1 and the plug-in molded case circuit breaker provided in the embodiments 2 and 3 are compared with those of the original fixed frame circuit breaker and drawer frame circuit breaker, respectively, as shown in the following table:
in summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A molded case circuit breaker having frame circuit breaker features, comprising: the fixed breaker comprises a fixed breaker body, a fixed board front wiring row (7) and an insulating rear cover board;
The structure of fixed circuit breaker body is the same with frame-type circuit breaker body structure, includes: the device comprises a plastic shell (3), a contact system and an arc extinguishing system which are arranged in the plastic shell (3), and an electronic release (4), an operating mechanism (5) and an electric energy storage mechanism (6) which are arranged on the front end face of the plastic shell (3);
a fixed plate front wiring row (7) is arranged on the rear end face of the plastic shell (3), and the input end and the output end of the fixed plate front wiring row (7) are respectively led out to the upper part and the lower part of the plastic shell (3);
an insulating rear cover plate is arranged on the rear end face of the plastic shell (3);
The molded case circuit breaker is installed in a hanging mode.
2. A molded case circuit breaker having frame circuit breaker features, comprising: the plug-in circuit breaker comprises a plug-in circuit breaker body (8), an insulating rear cover plate and a plug-in mounting table;
The structure of the plug-in circuit breaker body (8) is the same as that of the frame type circuit breaker body, and the plug-in circuit breaker comprises: the device comprises a plastic shell (3), a contact system and an arc extinguishing system which are arranged in the plastic shell (3), an electronic release (4), an operating mechanism (5) and an electric energy storage mechanism (6) which are arranged on the front end face of the plastic shell (3);
an insulating rear cover plate is arranged on the rear end face of the plastic shell (3);
the outlet end of the plug-in circuit breaker body (8) is a plane plug extending out of the insulating rear cover plate;
a wiring row is arranged at a position corresponding to the plane plug on the plug-in mounting table;
The plug-in mounting table is in butt joint with the rear end face of the plug-in circuit breaker body (8) so that the wiring row is connected and conducted with the plane plug, and the plug-in mounting table is detachably connected with the plug-in circuit breaker body (8);
The molded case circuit breaker is installed in a hanging mode.
3. The molded case circuit breaker with the frame circuit breaker characteristic according to claim 2, wherein the plug-in mounting table is a plug-in board rear wiring mounting table (9), the butt joint surface of the plug-in board rear wiring mounting table (9) and the plug-in circuit breaker body (8) is a front end surface, a plug-in board rear wiring row (10) is arranged at a position corresponding to a plane plug on the rear end surface of the plug-in board rear wiring mounting table (9), and the plane plug on the plug-in circuit breaker body (8) is connected and conducted with the plug-in board rear wiring row (10) on the rear end surface of the plug-in board rear wiring mounting table (9) through a jack on the plug-in board rear wiring mounting table (9).
4. The molded case circuit breaker with the frame circuit breaker characteristic according to claim 2, characterized in that the plug-in mounting table is a plug-in board front wiring mounting table (11), the abutting surface of the plug-in board front wiring mounting table (11) and the plug-in circuit breaker body (8) is the front end surface thereof, a plug-in board front wiring row (12) is arranged on the front end surface of the plug-in board front wiring mounting table (11), and the input end and the output end of the plug-in board front wiring row (12) are led out to the upper part and the lower part of the plug-in board front wiring mounting table (11) respectively; the plane plug on the plug-in circuit breaker body (8) is directly connected and conducted with the plug-in board front wiring row (12) of the front end face of the plug-in board front wiring installation table (11).
5. A molded case circuit breaker with frame circuit breaker features according to claim 2 or 3, characterized in that the removable connection between the plug-in mounting table and the plug-in circuit breaker body (8) is: a pin shaft is arranged on the abutting surface of the plug-in mounting table and the plug-in breaker body (8), and the plug-in breaker body (8) is abutted with the plug-in mounting table by inserting the pin shaft into a pin hole on the plug-in breaker body (8); the plug-in circuit breaker body (8) and plug-in mounting table are then connected by means of fasteners.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910256061.7A CN110010418B (en) | 2019-04-01 | 2019-04-01 | Plastic case circuit breaker with frame circuit breaker characteristics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910256061.7A CN110010418B (en) | 2019-04-01 | 2019-04-01 | Plastic case circuit breaker with frame circuit breaker characteristics |
Publications (2)
| Publication Number | Publication Date |
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| CN110010418A CN110010418A (en) | 2019-07-12 |
| CN110010418B true CN110010418B (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910256061.7A Active CN110010418B (en) | 2019-04-01 | 2019-04-01 | Plastic case circuit breaker with frame circuit breaker characteristics |
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| Country | Link |
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| CN (1) | CN110010418B (en) |
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| CN107342198A (en) * | 2017-08-23 | 2017-11-10 | 河北宝凯电气股份有限公司 | A kind of breaker of plastic casing with powerful disjunction short circuit current ability |
| CN207381343U (en) * | 2017-10-12 | 2018-05-18 | 江西斯德尔电气有限公司 | A kind of novel plastic shell formula breaker |
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| US20010025773A1 (en) * | 2000-03-17 | 2001-10-04 | Rane Mahesh Jaywant | Draw out arrangement for molded case circuit breakers |
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2019
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| JP2010061830A (en) * | 2008-09-01 | 2010-03-18 | Fuji Electric Fa Components & Systems Co Ltd | Electric operating device of circuit breaker |
| CN201364859Y (en) * | 2009-02-06 | 2009-12-16 | 李建民 | Novel connection terminal of breaker |
| CN201689835U (en) * | 2010-03-18 | 2010-12-29 | 杭州日安电器有限公司 | Plastic outer casing type circuit breaker |
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| KR20140056810A (en) * | 2012-10-31 | 2014-05-12 | 현대중공업 주식회사 | Mccb combination with structure of the lug |
| KR20140111878A (en) * | 2013-03-12 | 2014-09-22 | 엘에스산전 주식회사 | A cradle for a withdrawable circuit breaker |
| CN104008929A (en) * | 2014-04-29 | 2014-08-27 | 常熟瑞特电气股份有限公司 | Surface contact plug-in type circuit breaker |
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| Publication number | Publication date |
|---|---|
| CN110010418A (en) | 2019-07-12 |
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Country or region after: China Address after: 215500 No.2 Qingdao Road, high tech Industrial Park, Yushan Town, Changshu City, Suzhou City, Jiangsu Province Applicant after: Changshu Guorui Technology Co.,Ltd. Address before: 215500 Yushan High-tech Industrial Park, Changshu City, Jiangsu Province, No. 40, Suzhou Road Applicant before: CHANGSHU RUITE ELECTRIC Co.,Ltd. Country or region before: China |
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