CN219676045U - Time delay checking table for high-current molded case circuit breaker - Google Patents
Time delay checking table for high-current molded case circuit breaker Download PDFInfo
- Publication number
- CN219676045U CN219676045U CN202223450829.0U CN202223450829U CN219676045U CN 219676045 U CN219676045 U CN 219676045U CN 202223450829 U CN202223450829 U CN 202223450829U CN 219676045 U CN219676045 U CN 219676045U
- Authority
- CN
- China
- Prior art keywords
- circuit breaker
- case circuit
- plate
- base plate
- screw
- 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
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 36
- 229910052802 copper Inorganic materials 0.000 claims description 36
- 239000010949 copper Substances 0.000 claims description 36
- 238000012795 verification Methods 0.000 claims description 17
- 230000000149 penetrating effect Effects 0.000 claims description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The utility model discloses a high-current plastic-case circuit breaker delay calibration stand which comprises a support base plate, wherein the plastic-case circuit breaker is arranged on the front surface of the support base plate, and a calibration device for carrying out delay calibration on the plastic-case circuit breaker is arranged on the back surface of the support base plate. The utility model solves the problem that the traditional molded case circuit breaker is easy to have lower accuracy of the checking result in the checking process in the prior art. The utility model has the advantages of high measurement accuracy, strong stability in working, simple structure, convenient operation and the like.
Description
Technical Field
The utility model relates to the field of circuit breaker structures, in particular to a time delay checking table of a high-current molded case circuit breaker.
Background
At present, chinese patent discloses a plastic-case circuit breaker of dampproofing on net, publication number CN215896268U relates to the circuit breaker field, including plastic-case circuit breaker body, its characterized in that: the circuit breaker is characterized in that the front end of the plastic shell circuit breaker body is provided with a circuit breaker front cover, the back end of the plastic shell circuit breaker body is provided with a mounting plate, the front end of the plastic shell circuit breaker front cover is provided with a switch groove, the inside of the switch groove is provided with a control switch, the left and right sides symmetry of the top and the bottom of the back end of the plastic shell circuit breaker body is provided with a fixed slide block, the left and right sides symmetry of the front end of the mounting plate is provided with a limiting slide groove, and the left and right sides symmetry of the top of the plastic shell circuit breaker body is provided with a baffle. According to the moisture-proof molded case circuit breaker, the plastic case circuit breaker body can be fixed in a clamping manner through the cooperation of the mounting plate, the fixing sliding block and the limiting sliding groove, and the moisture-proof molded case circuit breaker is convenient to install or maintain.
The molded case circuit breaker is required to simulate the automatic tripping condition under the overcurrent condition when in actual use before leaving the factory, namely delay verification, because the delay action time of the high-current molded case circuit breaker is longer, the multi-station verification is generally carried out simultaneously, namely the product is installed and verified simultaneously, but when the circuit breaker is verified, the planes of all connecting plates below the circuit breaker are difficult to be horizontal, the contact areas of the circuit breaker and the circuit breaker are difficult to be unified, the circuit breaker and the circuit breaker are in contact with each other only at one point, the heating of each phase is obviously inconsistent, the bending of the bimetallic strip of each phase obviously exists fast and slow, and the accuracy of the delay verification is influenced.
Disclosure of Invention
The utility model aims to solve the problem that the accuracy of a checking result is low when the traditional molded case circuit breaker is checked, and provides a delay checking table for the high-current molded case circuit breaker, which can obtain the checking result with high accuracy.
The utility model relates to a high-current plastic-case circuit breaker delay calibration stand, which comprises a bracket base plate, wherein the front surface of the bracket base plate is provided with a plastic-case circuit breaker, and the back surface of the bracket base plate is provided with a calibration device for carrying out delay calibration on the plastic-case circuit breaker.
Preferably, the verification device comprises a lower guide plate, the lower guide plate is fixed on the front surface of a support bottom plate positioned at the lower end of the molded case circuit breaker through screws, and the front surface of the support bottom plate positioned at the upper end of the molded case circuit breaker is fixedly connected with an upper guide plate through screws.
Preferably, the upper end of the lower guide plate is provided with 3 uniformly distributed lower guide grooves, the lower guide grooves are internally inserted with lower contacts for being electrically connected with the lower port of the molded case circuit breaker, the lower end of the upper guide plate is provided with 3 uniformly distributed upper guide grooves, the upper guide grooves are internally inserted with upper contacts for being electrically connected with the upper port of the molded case circuit breaker, the support bottom plate at the upper guide groove of the support bottom plate is provided with an upper through hole communicated with the upper guide groove, the support bottom plate at the lower guide groove of the support bottom plate is provided with a lower through hole communicated with the lower guide groove, the upper contacts are sequentially inserted in the upper through holes and the upper guide grooves, and the lower contacts are sequentially inserted in the lower through holes and the lower guide grooves.
Preferably, the left side of the back of the support bottom plate is provided with a base plate, the back of the support bottom plate is fixedly connected with the base plate through welding 4 evenly distributed equal-height blocks, an upper telescopic cylinder and a lower telescopic cylinder for adjusting the height of an upper contact are arranged between the base plate and the support bottom plate, and the back of the base plate is fixedly connected with a front telescopic cylinder and a rear telescopic cylinder which are matched with the upper contact through screws.
Preferably, the upper telescopic cylinder and the lower telescopic cylinder are fixedly connected with the back of the bottom plate of the bracket through screws, a sliding plate is fixedly sleeved at the upper end of a piston rod of the upper telescopic cylinder and the lower telescopic cylinder, a driving hole matched with the upper contact is formed in the sliding plate, and the upper contact is inserted into the driving hole.
Preferably, the upper contact and the lower contact are identical in structure and are distributed vertically symmetrically, the longitudinal section of the lower contact is L-shaped, a first screw hole is formed in the upper end of the vertical portion of the lower contact, a copper screw is mounted in the first screw hole through threads, the longitudinal section of the copper screw is T-shaped, a silver piece which is used for being electrically connected with the lower port of the molded case circuit breaker is embedded on the left end face of the copper screw, a nut is sleeved on the right end of the copper screw, a spring is sleeved on the copper screw between the left end of the nut and the right end of the vertical portion of the lower contact, a first interface penetrating through the nut and the copper screw is formed in the nut, a second connector is electrically connected in the first interface, a second screw is connected in the lower end of the vertical portion of the lower contact through threads, a second connector penetrating through the copper screw is formed in the copper screw hole, and the second connector penetrating through the copper screw is formed in the copper screw between the right end of the copper screw and the lower contact, and the other end of the second connector is electrically connected with the second connector.
Preferably, a conical washer is sleeved between the left end face of the vertical part of the lower contact and the left end of the copper screw, and a spherical washer matched with the conical washer is sleeved between the conical washer and the left end of the copper screw.
The spherical washer and the conical washer can enable silver sheets on the copper screw rod to be well suitable for the contact surface of the lower port of the circuit breaker, enable the spherical washer and the conical washer to be well contacted, and improve stability during testing.
Preferably, the left end of the horizontal part of the lower contact is provided with a third screw hole, the third screw hole is internally connected with a screw rod in a threaded manner, a floating plate for driving the lower contact is sleeved on the screw rod, a connecting sleeve rod is sleeved on the screw rod between the right end of the floating plate and the left end of the horizontal part of the lower contact, a connecting sleeve hole matched with the connecting sleeve rod is formed in the floating plate, the left end of the connecting sleeve rod is inserted in the connecting sleeve hole in a penetrating manner, the right end of the connecting sleeve rod is fixedly connected with the left end of the lower contact through a coupler, a limiting ring is welded on the connecting sleeve rod positioned at the right end of the floating plate, and a clamping ring matched with the limiting ring is sleeved on the connecting sleeve rod positioned at the left end of the floating plate in a threaded manner.
As the preference, the screw thread cover that is located the clamp ring left side is equipped with stop nut, is located the cover on the screw rod between stop nut and clamp ring and is equipped with the reset spring that is used for resetting the floating plate, around telescopic cylinder piston rod on the cover be equipped with the drive ejector pad that is used for driving the floating plate, be equipped with respectively on the telescopic cylinder around the drive ejector pad upper and lower both ends and drive the guide bar that the ejector pad cooperation was used, the longitudinal section of drive ejector pad be the protruding font, the floating plate on open and to have the piston through-hole with drive ejector pad front end phase-match, open respectively on the floating plate that is located the upper and lower both sides of piston through-hole with guide bar assorted guide through-hole.
When the circuit breaker works, the plastic shell circuit breaker is firstly arranged on the right side panel of the bracket, the upper telescopic cylinder and the lower telescopic cylinder are started to drive the sliding plate, so that the upper contact slides along the chute of the guide plate to the upper connecting plate direction of the circuit breaker; and starting the front and rear telescopic cylinders to enable the floating plate to slide leftwards along the guide rod, enabling the floating plate to compress the spring, enabling the screw rod, the flexible connection, the upper contact and the lower contact to slide leftwards along the sliding grooves of the upper guide plate and the lower guide plate respectively, enabling the upper contact and the silver sheet to be in close contact with the upper port and the lower port of the circuit breaker respectively, and then starting the power supply to start delay verification.
After the verification is finished, the power supply of the front and rear telescopic cylinders is cut off, and the reset spring can separate the upper contact from the lower contact from the upper port and the lower port of the circuit breaker and return to the original position.
The contact areas of the upper contact and the lower contact can be unified by the mode, so that the upper contact and the lower contact generate heat uniformly, the bending degree of the bimetallic strip is similar, and the accuracy of time delay verification is improved.
The utility model has the following beneficial effects: the measuring accuracy is high, and during operation stability is strong, simple structure, convenient operation.
Drawings
Fig. 1 is a front view of the present utility model.
Fig. 2 is a side view of the present utility model.
FIG. 3 is a schematic view of the structure of the screw of the present utility model.
The device comprises a bracket bottom plate 1, a molded case circuit breaker 2, a lower guide plate 3, an upper guide plate 4, a lower contact 5, an upper contact 6, a base plate 7, a constant-height block 8, an upper telescopic cylinder 9, a lower telescopic cylinder 10, a sliding plate 11, a copper screw 12, a silver piece 13, a row plug 14, a copper screw 15, a conical surface washer 17, a spherical surface washer 18, a screw 19, a connecting sleeve rod 20, a coupler 21, a limiting ring 22, a clamping ring 23, a reset spring 24, a driving push block 25, a floating plate 26 and a guide rod 27.
Detailed Description
The technical scheme of the utility model is further specifically described below through examples and with reference to the accompanying drawings.
Examples: according to the large-current molded case circuit breaker time delay verification table of the embodiment, which is further described in the accompanying drawings 1, 2 and 3, the large-current molded case circuit breaker time delay verification table comprises a support base plate 1, wherein a molded case circuit breaker 2 is installed on the front surface of the support base plate 1, and a verification device for time delay verification of the molded case circuit breaker 2 is arranged on the back surface of the support base plate 1.
The verification device comprises a lower guide plate 3, the lower guide plate 3 is fixed on the front surface of a support base plate 1 positioned at the lower end of the molded case circuit breaker 2 through screws, and the front surface of the support base plate 1 positioned at the upper end of the molded case circuit breaker 2 is fixedly connected with an upper guide plate 4 through screws.
The upper end of the lower guide plate 3 is provided with 3 uniformly distributed lower guide grooves, the lower guide grooves are internally inserted with lower contacts 5 which are electrically connected with the lower port of the molded case circuit breaker 2, the lower end of the upper guide plate 4 is provided with 3 uniformly distributed upper guide grooves, the upper guide grooves are internally inserted with upper contacts 6 which are electrically connected with the upper port of the molded case circuit breaker 2, the support bottom plate 1 at the upper guide groove of the support bottom plate 1 is provided with upper through holes which are communicated with the upper guide grooves, the support bottom plate 1 at the lower guide groove of the support bottom plate 1 is provided with lower through holes which are communicated with the lower guide grooves, the upper contacts 6 are sequentially inserted in the upper through holes and the upper guide grooves, and the lower contacts 5 are sequentially inserted in the lower through holes and the lower guide grooves.
The left side of the back of the support bottom plate 1 is provided with a base plate 7, the back of the support bottom plate 1 is fixedly connected with the base plate 7 through welding 4 evenly distributed equal-height blocks 8, an upper telescopic cylinder 9 and a lower telescopic cylinder 9 for adjusting the height of the upper contact 6 are arranged between the base plate 7 and the support bottom plate 1, and the back of the base plate 7 is fixedly connected with a front telescopic cylinder 10 and a rear telescopic cylinder 10 which are matched with the upper contact 6 for use through screws.
The upper telescopic cylinder 9 and the lower telescopic cylinder are fixedly connected with the back of the bracket bottom plate 1 through screws, a sliding plate 11 is fixedly sleeved at the upper end of a piston rod of the upper telescopic cylinder 9, a driving hole matched with the upper contact 6 is formed in the sliding plate 11, and the upper contact 6 is inserted into the driving hole.
The upper contact 6 and the lower contact 5 are identical in structure and are distributed symmetrically up and down, the longitudinal section of the lower contact 5 is L-shaped, a first screw hole is formed in the upper end of the vertical portion of the lower contact 5, a second screw hole is formed in the lower end of the vertical portion of the lower contact 5, the longitudinal section of the second screw hole is T-shaped, a silver piece 13 used for being electrically connected with the lower port of the molded case circuit breaker 2 is embedded on the left end face of the copper screw 12, a nut is sleeved on the right end of the copper screw 12, a spring is sleeved on the copper screw 12 between the left end of the nut and the right end of the vertical portion of the lower contact 5, a first interface penetrating through the nut and the copper screw 12 is formed in the nut, a row of plugs 14 are electrically connected in the first interface, a second screw hole is formed in the lower end of the vertical portion of the lower contact 5, a second screw 15 is connected with a copper screw 15 through the second interface is formed in the copper screw 15 between the right end of the copper screw 15 and the lower contact 5, and the second interface is electrically connected with the second interface through the second interface.
The left end face of the vertical part of the lower contact 5 and the left end of the copper screw rod 12 are sleeved with a conical washer 17, and the left end of the conical washer 17 and the copper screw rod 12 are sleeved with a spherical washer 18 matched with the conical washer 17.
The left end of the horizontal part of the lower contact 5 is provided with a third screw hole, the third screw hole is internally connected with a screw 19 in a threaded manner, a floating plate 26 for driving the lower contact 5 is sleeved on the screw 19, a connecting sleeve rod 20 is sleeved on the screw 19 positioned between the right end of the floating plate 26 and the left end of the horizontal part of the lower contact 5, a connecting sleeve hole matched with the connecting sleeve rod 20 is formed in the floating plate 26, the left end of the connecting sleeve rod 20 is inserted in the connecting sleeve hole in a penetrating manner, the right end of the connecting sleeve rod 20 is fixedly connected with the left end of the lower contact 5 through a coupler 21, a limiting ring 22 is welded on the connecting sleeve rod 20 positioned at the right end of the floating plate 26, and a clamping ring 23 matched with the limiting ring 22 is sleeved on the connecting sleeve rod 20 positioned at the left end of the floating plate 26 in a threaded manner.
The screw rod 19 positioned at the left side of the clamping ring 23 is sheathed with a limit nut in a threaded manner, the screw rod 19 positioned between the limit nut and the clamping ring 23 is sheathed with a reset spring 24 for resetting a floating plate 26, the piston rods of the front and rear telescopic cylinders 10 are sheathed with driving push blocks 25 for driving the floating plate 26, the front and rear telescopic cylinders 10 positioned at the upper end and the lower end of the driving push blocks 25 are respectively provided with guide rods 27 matched with the driving push blocks 25, the longitudinal section of the driving push blocks 25 is in a convex shape, the floating plate 26 is provided with piston through holes matched with the front end parts of the driving push blocks 25, and the floating plates 26 positioned at the upper side and the lower side of the piston through holes are respectively provided with guide through holes matched with the guide rods 27.
The above embodiments are merely examples of the present utility model, but the present utility model is not limited thereto, and any changes or modifications made by those skilled in the art are included in the scope of the present utility model.
Claims (7)
1. The high-current plastic-case circuit breaker delay calibration stand comprises a support base plate (1) and is characterized in that a plastic-case circuit breaker (2) is arranged on the front surface of the support base plate (1), and a calibration device for carrying out delay calibration on the plastic-case circuit breaker (2) is arranged on the back surface of the support base plate (1); the verification device comprises a lower guide plate (3), wherein the lower guide plate (3) is fixed on the front surface of a support base plate (1) positioned at the lower end of the molded case circuit breaker (2) through screws, and an upper guide plate (4) is fixedly connected to the front surface of the support base plate (1) positioned at the upper end of the molded case circuit breaker (2) through screws; the upper end of the lower guide plate (3) is provided with 3 uniformly distributed lower guide grooves, the lower guide grooves are internally inserted with lower contacts (5) which are electrically connected with lower ports of the molded case circuit breaker (2), the lower end of the upper guide plate (4) is provided with 3 uniformly distributed upper guide grooves, the upper guide grooves are internally inserted with upper contacts (6) which are electrically connected with upper ports of the molded case circuit breaker (2), the support bottom plate (1) at the upper guide grooves of the support bottom plate (1) is provided with upper through holes which are communicated with the upper guide grooves, the support bottom plate (1) at the lower guide grooves of the support bottom plate (1) is provided with lower through holes which are communicated with the lower guide grooves, the upper contacts (6) are sequentially inserted in the upper through holes and the upper guide grooves, and the lower contacts (5) are sequentially inserted in the lower through holes and the lower guide grooves.
2. The high-current molded case circuit breaker time-delay verification table according to claim 1, wherein a base plate (7) is arranged on the left side of the back of the support base plate (1), the back of the support base plate (1) is fixedly connected with the base plate (7) through welding 4 evenly distributed equal-height blocks (8), an upper telescopic cylinder (9) and a lower telescopic cylinder (9) for adjusting the height of an upper contact (6) are arranged between the base plate (7) and the support base plate (1), and the back of the base plate (7) is fixedly connected with a front telescopic cylinder (10) and a rear telescopic cylinder (6) which are matched with the upper contact to be used through screws.
3. The time-delay calibration stand for the high-current molded case circuit breaker according to claim 2, wherein the upper telescopic cylinder (9) is fixedly connected with the back of the support base plate (1) through screws, a sliding plate (11) is fixedly sleeved at the upper end of a piston rod of the upper telescopic cylinder (9), a driving hole matched with the upper contact (6) is formed in the sliding plate (11), and the upper contact (6) is inserted into the driving hole.
4. The high-current molded case circuit breaker time-delay verification table according to claim 3, wherein the upper contact (6) and the lower contact (5) are identical in structure and are distributed symmetrically up and down, the longitudinal section of the lower contact (5) is L-shaped, a first screw hole is formed in the upper end of the vertical portion of the lower contact (5), a copper screw (12) is mounted in the first screw hole through threads, the longitudinal section of the copper screw (12) is T-shaped, a silver sheet (13) for being electrically connected with the lower port of the molded case circuit breaker (2) is embedded on the left end face of the copper screw (12), a nut is sleeved on the right end of the copper screw (12), a first interface penetrating through the nut and the copper screw (12) is formed in the nut, a row of plug pins (14) are electrically connected in the first interface, a second screw hole is formed in the upper end of the lower contact (5), a second interface is electrically connected with the copper screw hole (15) and the copper screw (15) is in the right end of the copper screw (12), and the second interface is electrically connected with the copper screw (15) through the second screw hole.
5. The high-current molded case circuit breaker time delay verification table according to claim 4 is characterized in that a conical washer (17) is sleeved between the left end face of the vertical part of the lower contact (5) and the left end of the copper screw (12), and a spherical washer (18) matched with the conical washer (17) is sleeved between the conical washer (17) and the left end of the copper screw (12).
6. The high-current molded case circuit breaker time-delay verification table according to claim 4, wherein a third screw hole is formed in the left end of the horizontal portion of the lower contact (5), a screw rod (19) is connected with the third screw hole in a threaded manner, a floating plate (26) for driving the lower contact (5) is sleeved on the screw rod (19), a connecting sleeve rod (20) is sleeved on the screw rod (19) between the right end of the floating plate (26) and the left end of the horizontal portion of the lower contact (5), a connecting sleeve hole matched with the connecting sleeve rod (20) is formed in the floating plate (26), the left end of the connecting sleeve rod (20) is inserted into the connecting sleeve hole in a penetrating manner, the right end of the connecting sleeve rod (20) is fixedly connected with the left end of the lower contact (5) through a coupler (21), a limiting ring (22) is welded on the connecting sleeve rod (20) positioned on the right end of the floating plate (26), and the connecting sleeve rod (20) positioned on the left end of the floating plate (26) is provided with a limiting ring (23) matched with the limiting ring.
7. The time-delay calibration stand of the high-current molded case circuit breaker according to claim 6, wherein a limit nut is sleeved on a screw rod (19) positioned on the left side of the clamping ring (23), a reset spring (24) for resetting a floating plate (26) is sleeved on the screw rod (19) positioned between the limit nut and the clamping ring (23), a driving push block (25) for driving the floating plate (26) is sleeved on a piston rod of the front and rear telescopic cylinders (10), guide rods (27) matched with the driving push block (25) are respectively arranged on the front and rear telescopic cylinders (10) positioned on the upper end and the lower end of the driving push block (25), the longitudinal section of the driving push block (25) is in a convex shape, piston through holes matched with the front end parts of the driving push block (25) are formed in the floating plates (26), and guide through holes matched with the guide rods (27) are respectively formed in the floating plates (26) positioned on the upper side and the lower side of the piston through holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223450829.0U CN219676045U (en) | 2022-12-23 | 2022-12-23 | Time delay checking table for high-current molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223450829.0U CN219676045U (en) | 2022-12-23 | 2022-12-23 | Time delay checking table for high-current molded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219676045U true CN219676045U (en) | 2023-09-12 |
Family
ID=87920432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223450829.0U Active CN219676045U (en) | 2022-12-23 | 2022-12-23 | Time delay checking table for high-current molded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219676045U (en) |
-
2022
- 2022-12-23 CN CN202223450829.0U patent/CN219676045U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101408601A (en) | Automatic short circuit automatic connection apparatus of single-phase multifunctional electrical energy meter calibration stand | |
| CN109342969A (en) | A kind of test device and application method of adjustable battery pack spacing | |
| CN116165519B (en) | Chip ground pin connectivity testing device | |
| CN219676045U (en) | Time delay checking table for high-current molded case circuit breaker | |
| CN106226683B (en) | Multifunctional integrated circuit debugging instrument with circuit board rapid welding device | |
| CN203786157U (en) | Conversion device for PCB connector test | |
| CN202956484U (en) | Plugging device for automatic detection of single-phase electric energy meters | |
| CN210038089U (en) | Needle bed mechanism | |
| CN203287476U (en) | Withstand voltage test jig for magnetic cores of transformers | |
| CN211123137U (en) | ICT light sensation test fixture | |
| CN216351167U (en) | Detection jig for wiring terminal strip | |
| CN215493943U (en) | Insert detection and insulation and voltage resistance testing device | |
| CN201489107U (en) | Automatic crimping meter calibration device | |
| CN208999069U (en) | A kind of small size breaker device iron core detection fixture | |
| CN210360028U (en) | Clamping tool for production and processing of switching power supply | |
| CN210604176U (en) | Novel conductive material compression resilience performance test device | |
| CN201281761Y (en) | Automatic short-circuit automatic connection device for novel single-phase multifunctional electric energy meter calibration stand | |
| CN106324480B (en) | Multifunctional integrated circuit debugging instrument | |
| CN205539201U (en) | Moulded case circuit breaker return circuit resistance test subassembly | |
| CN220455464U (en) | Clock chip test fixture | |
| CN206832397U (en) | Insertion force test fixture | |
| CN213934100U (en) | FlexPCB optical function test carrier | |
| CN215867006U (en) | Testing device of universal circuit breaker | |
| CN219143039U (en) | Air switch carrier | |
| CN218917462U (en) | Wire harness conduction detection equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |