CN212808526U - Automatic switching device for low-voltage circuit breaker electric leakage and short circuit test - Google Patents
Automatic switching device for low-voltage circuit breaker electric leakage and short circuit test Download PDFInfo
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- CN212808526U CN212808526U CN202021026427.6U CN202021026427U CN212808526U CN 212808526 U CN212808526 U CN 212808526U CN 202021026427 U CN202021026427 U CN 202021026427U CN 212808526 U CN212808526 U CN 212808526U
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Abstract
The utility model discloses an automatic switching device for low-voltage circuit breaker electric leakage and short circuit test, including unable adjustment base and rotatory thing platform of putting, the circular boss at unable adjustment base center establishes bearing and fixed axle, and unable adjustment base establishes four groups telescopic link parts, and the telescopic link part includes dumbbell shape connecting rod, spring and conductive ball, establishes short circuit test module and electric leakage test module with the conductive ball is connected in the unable adjustment base, and the motor cabinet of unable adjustment base establishes low-speed motor, drive shaft and bevel gear; the annular chute liner of the rotary object placing table is provided with an arc-shaped conducting strip, the arc-shaped conducting strip is connected with a circuit breaker through a splicing piece, and a bevel gear ring is arranged at the bottom of the rotary object placing table. The utility model discloses realize a tractor serves two purposes, accomplish the short circuit test to low-voltage circuit breaker and the automatic switch-over of electric leakage test, avoid manually operation's loaded down with trivial details, but the test time and the interval time of two kinds of tests are adjustable simultaneously to but manifold cycles detects, is favorable to improving the accuracy and the security of test.
Description
Technical Field
The utility model relates to a circuit breaker detects technical field, especially relates to an automatic switching control equipment that is used for low voltage circuit breaker electric leakage and short circuit test.
Background
A low-voltage circuit breaker (once called an automatic switch) is a switching device which can not only connect and disconnect normal load current and overload current, but also connect and disconnect short-circuit current. The low-voltage circuit breaker has certain protection functions such as overload, short circuit, undervoltage and leakage protection besides the function of starting control in the circuit.
The detection of the existing low-voltage circuit breaker generally needs to perform a leakage test and a short-circuit test besides related tests of mechanical characteristics and reaction time, the two tests are different in circuit, and the threshold values of the test currents are completely inconsistent. The short-circuit test completely needs the test current to be more than 4000 amperes, the reaction current value during the electric leakage test is about dozens of milliamperes, two devices, namely an electric leakage current test instrument and a short-circuit current test instrument, are still needed during the detection of the existing circuit breaker, and the wiring needs to be continuously inserted from the wiring port of the circuit breaker during the multiple detection, so that the repeatability and the reliability of the detection data are not facilitated;
in addition, a certain time interval is needed between every two detection operations, in the prior art, manual timing control is adopted, the detection process needs to pay attention to the wiring plugging and unplugging time of the circuit breaker at any time, for example, a short circuit test may need to be continuously tested for about 10 times, 10 times of plugging and unplugging or 10 times of switching time adjustment are needed, time and labor are wasted, and the safety is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the shortcoming that exists among the prior art, and the automatic switching control equipment who is used for low voltage circuit breaker electric leakage and short circuit test that provides.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the automatic switching device for the low-voltage circuit breaker leakage and short circuit test comprises a fixed base and a rotary object placing table, wherein the fixed base is specifically of a cylindrical insulating hollow shell structure, a circular boss is arranged at the center of the top surface of the fixed base and is of a shell structure, the fixed base and the circular boss are integrally formed and form the insulating hollow shell structure with a convex vertical section, a bearing is fixedly arranged at the center of the top surface of the circular boss, a fixed shaft is sleeved in the bearing and is vertically arranged, the lower part of the fixed shaft is in interference clamping connection in the bearing in an interference mode, four groups of telescopic rod components are further symmetrically arranged on the top surface of the fixed base, and the four groups of telescopic rod components are symmetrically distributed along the;
any group of telescopic rod components comprises a dumbbell-shaped connecting rod which is connected to the top surface of the fixed base in a penetrating mode, the dumbbell-shaped connecting rod consists of a straight rod in the middle and circular blocks at two ends, the circular block at the bottom end of the dumbbell-shaped connecting rod extends into the fixed base, a spring is sleeved in the middle of the dumbbell-shaped connecting rod and is located between the circular block at the top end of the dumbbell-shaped connecting rod and the fixed base, and a conductive ball is fixedly embedded in the top end of the dumbbell-shaped connecting rod;
the short circuit testing module and the electric leakage testing module are arranged inside the fixed base, wherein two symmetrical conductive balls are respectively and electrically connected with the short circuit testing module through cables, and the other two conductive balls are respectively and electrically connected with the electric leakage testing module through cables;
a motor base is fixedly arranged on the outer side wall of the fixed base, a low-speed motor is arranged at the top of the motor base, a vertical driving shaft is arranged at the top of the low-speed motor, and a bevel gear is arranged at the top end of the driving shaft;
the rotary object placing table is specifically of an insulating solid structure with a concave-shaped vertical section, a cylindrical groove in sliding sleeve joint with the circular boss is formed in the center of the bottom surface of the rotary object placing table, the top end face of the fixed shaft is fixedly connected to the center of the cylindrical groove, an annular sliding groove concentric with the cylindrical groove is further formed in the bottom surface of the rotary object placing table, two groups of symmetrical arc-shaped conducting strips are lined in the annular sliding groove, the radian of each arc-shaped conducting strip is 5-10 degrees, the arc-shaped conducting strips in the annular sliding groove are all ceramic insulators except the arc-shaped conducting strips, any one arc-shaped conducting strip is electrically connected with a splicing piece through a;
the top of the rotary object placing table is provided with a clamp clamped with the circuit breaker, and the circuit breaker is electrically connected with the two groups of splicing pieces;
the bottom position of the outer side wall of the rotary object placing table is provided with a bevel gear ring which is engaged with the bevel gear.
Preferably, the rotating speed of the low-speed motor is 1-5r/min and is divided into 5-gear rotating speed settings such as 1 r/min, 2 r/min, 3 r/min, 4 r/min and 5r/min, and the 5-gear rotating speed settings are used for adjusting the rotating speed of the rotating object placing table, namely adjusting the contact time of the arc-shaped conducting strips and the conducting balls.
Preferably, the gear ratio of the bevel gear to the bevel gear ring ranges from 1:30 to 1:50, the contact time of a specific arc-shaped conducting sheet and one defined conducting ball is 10/360 multiplied by 10 minutes and about 16.7 seconds by gear transmission, and assuming that a low-speed motor rotates 5 circles for 1 minute and then rotates 1 circle for 10 minutes after the gear transmission of 1:50, and the radian of the arc-shaped conducting sheet is 10 degrees; the total conduction time is about 10/90 times 10 minutes to about 66.7 seconds, and the remaining approximately 8 minutes are the insulation period, thereby providing sufficient free time for short circuit testing and leakage testing, avoiding too fast a current change, and providing sufficient test reading time.
Preferably, the short circuit testing module is a BE-XL-15000A type large current short circuit testing device, and according to the product literature records, the core components of the short circuit testing module are a low-voltage large current generating device and a mutual inductor for reading, and the short circuit testing module mainly provides large current for the circuit breaker.
Preferably, the electric leakage test module specifically is the electric leakage switch digital detector of AR5406 model, is circuit equipment commonly used, safe and reliable the utility model discloses in, can inlay on unable adjustment base's outer wall its display.
Preferably, the contact pieces, the arc-shaped conducting pieces and the conducting balls are all tin-plated copper, two groups of contact pieces, the arc-shaped conducting pieces and the conducting balls form a testing circuit, namely, the circuit breaker is respectively connected with the short circuit testing module or the electric leakage testing module according to a certain time interval rhythm, the electric connection time of the circuit breaker is related to the length of the arc-shaped conducting pieces and the rotating speed of the rotating object placing table, the electric leakage and short circuit testing of the low-voltage circuit breaker can be automatically switched, manual joint replacement is not needed, and a dual-purpose testing scheme is realized.
Preferably, unable adjustment base, rotatory thing platform and dumbbell shape connecting rod of putting are insulating ceramic for protect two sets of test circuit, improve the test security.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses simultaneously introduce short circuit test module and electric leakage test module in an equipment, realize a tractor serves two purposes, accomplish the short circuit test to low-voltage circuit breaker and the automatic switch-over of electric leakage test, avoid the loaded down with trivial details of manual operation, test time and the interval time of two kinds of tests simultaneously can all be adjusted through low-speed motor and gear drive to satisfy the security of suitable reading time and test interval; the method can realize repeated cyclic detection within a period of time, is favorable for repeatability and reliability of detection data, does not need laborious operations such as manual wiring, plugging and unplugging, saves time, even provides automation equipment for remote control detection, and is favorable for improving the accuracy and safety of the test.
Drawings
Fig. 1 is a schematic structural view of an automatic switching device for testing leakage and short circuit of a low-voltage circuit breaker according to the present invention;
fig. 2 is a perspective view of the fixing base of the automatic switching device for testing leakage and short circuit of the low-voltage circuit breaker according to the present invention;
fig. 3 is a top view of the top surface of the fixing base of the automatic switching device for testing the leakage and short circuit of the low-voltage circuit breaker according to the present invention;
fig. 4 is a bottom view of the rotary object placing table bottom surface of the automatic switching device for low-voltage circuit breaker electric leakage and short circuit test.
In the figure: the device comprises a fixed base 1, a rotary object placing table 2, a circular boss 3, a fixed shaft 4, a telescopic rod component 5, a dumbbell-shaped connecting rod 501, a spring 502, a conductive ball 503, a short circuit testing module 6, a leakage testing module 7, a motor base 8, a low-speed motor 9, a driving shaft 10, a bevel gear 11, a cylindrical groove 12, an annular sliding groove 13, an arc-shaped conductive sheet 14, a splicing sheet 15, a circuit breaker 16, a clamp 17, a bevel gear ring 18 and a bearing 19.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-4, the automatic switching device for low-voltage circuit breaker leakage and short circuit testing comprises a fixed base 1 and a rotary object placing table 2, wherein the fixed base 1 is specifically a cylindrical insulating hollow shell structure, a circular boss 3 is arranged at the center of the top surface of the fixed base 1, the circular boss 3 is a shell structure, the fixed base 1 and the circular boss 3 are integrally formed and form an insulating hollow shell structure with a convex vertical section, a bearing 19 is fixedly arranged at the center of the top surface of the circular boss 3, a fixed shaft 4 is sleeved in the bearing 19, the fixed shaft 4 is vertically arranged and is in interference clamping connection with the lower part of the fixed shaft 4 in the bearing 19, four groups of telescopic rod components 5 are further symmetrically arranged on the top surface of the fixed base 1, and the four groups of telescopic rod components 5 are symmetrically distributed; any group of telescopic rod components 5 comprises a dumbbell-shaped connecting rod 501 penetrating the top surface of the fixed base 1, the dumbbell-shaped connecting rod 501 consists of a straight rod in the middle and circular blocks at two ends, the circular block at the bottom end of the dumbbell-shaped connecting rod 501 extends into the fixed base 1, a spring 502 is sleeved in the middle of the dumbbell-shaped connecting rod 501 and is positioned between the circular block at the top end of the dumbbell-shaped connecting rod 501 and the fixed base 1, and a conductive ball 503 is fixedly embedded at the top end of the dumbbell-shaped connecting rod 501; a short circuit test module 6 and an electric leakage test module 7 are arranged inside the fixed base 1, wherein two symmetrical conductive balls 503 are respectively and electrically connected with the short circuit test module 6 through cables, and the other two conductive balls 503 are respectively and electrically connected with the electric leakage test module 7 through cables; a motor base 8 is fixedly arranged on the outer side wall of the fixed base 1, a low-speed motor 9 is arranged at the top of the motor base 8, a vertical driving shaft 10 is arranged at the top of the low-speed motor 9, and a bevel gear 11 is arranged at the top end of the driving shaft 10; the rotary object placing table 2 is specifically an insulating solid structure with a concave-shaped vertical section, a cylindrical groove 12 which is in sliding sleeve joint with the circular boss 3 is arranged in the center of the bottom surface of the rotary object placing table 2, the top end surface of the fixed shaft 4 is fixedly connected to the center of the cylindrical groove 12, an annular sliding groove 13 which is concentric with the cylindrical groove 12 is further arranged on the bottom surface of the rotary object placing table 2, two groups of symmetrical arc-shaped conducting strips 14 are lined in the annular sliding groove 13, the radian of each arc-shaped conducting strip 14 is 5-10 degrees, the arc-shaped conducting strips 14 in the annular sliding groove 13 are all ceramic insulators, any arc-shaped conducting strip 14 is electrically connected with a connecting piece 15 through a cable, and the connecting piece 15; the top of the rotary object placing table 2 is provided with a clamp 17 clamped with the circuit breaker 16, the clamp 17 adopts a common vice type clamp, the inner walls of the clamps 17 at the two sides of the circuit breaker 16 are provided with buffer rubber for preventing skidding and protecting the circuit breaker, and the circuit breaker 16 is electrically connected with the two groups of splicing pieces 15; the bottom of the outer side wall of the rotary object placing table 2 is provided with a bevel gear ring 18 which is engaged and connected with the bevel gear 11.
Referring to fig. 1-2, the low-speed motor 9 has a rotation speed of 1-5r/min, and is divided into 5-step rotation speed settings such as 1 r/min, 2 r/min, 3 r/min, 4 r/min, and 5r/min, and is used for adjusting the rotation speed of the rotating object placing table 2, i.e., adjusting the contact time between the arc-shaped conductive sheet 14 and the conductive ball 503.
Referring to fig. 1, the gear ratio of the bevel gear 11 to the bevel gear ring 18 ranges from 1:30 to 1:50, and by means of gear transmission, assuming that a low-speed motor rotates 5 turns for 91 minutes and becomes 1 turn for 10 minutes after 1:50 gear transmission, and the radian of the arc-shaped conductive sheets 14 is 10 °, the contact time of a specific arc-shaped conductive sheet 14 with one defined conductive ball 503 is 10/360 multiplied by 10 minutes and is about 16.7 seconds; the total conduction time is about 10/90 times 10 minutes to about 66.7 seconds, and the remaining approximately 8 minutes are the insulation period, thereby providing sufficient free time for short circuit testing and leakage testing, avoiding too fast a current change, and providing sufficient test reading time.
Referring to fig. 1, the short circuit testing module 6 is specifically a large current short circuit testing device of type BE-XL-15000A, and according to the product literature, the core components are a low voltage large current generating device and a mutual inductor for reading, and mainly provide a large current for the circuit breaker.
Referring to fig. 1, electric leakage test module 7 specifically is the electric leakage switch digital detector of AR5406 model, is circuit equipment commonly used, safe and reliable the utility model discloses in, can inlay on unable adjustment base 1's outer wall its display.
Referring to fig. 1, the contact pieces 15, the arc-shaped conductive pieces 14 and the conductive balls 503 are all tin-plated copper, and two groups of contact pieces 15, the arc-shaped conductive pieces 14 and the conductive balls 503 form a test circuit, that is, the circuit breaker 16 is respectively connected with the short circuit test module 6 or the electric leakage test module 7 according to a certain time interval rhythm, and the electric connection time is related to the length of the arc-shaped conductive pieces 14 and the rotating speed of the rotary object placing table 2, so that the electric leakage and short circuit tests of the low-voltage circuit breaker can be automatically switched without manually replacing connectors, and a dual-purpose test scheme is realized.
Referring to fig. 1 to 4, the fixed base 1, the rotary object placing table 2 and the dumbbell-shaped connecting rod 501 are made of insulating ceramics, and are used for protecting the two groups of test circuits and improving the test safety.
The utility model discloses a working process: when the short-circuit testing device is used, the short-circuit testing module 6 and the electric leakage testing module 7 are kept in an open state all the time, and the circuit breaker 16 to be tested is well fastened with the two contact pieces 15; the low-speed motor 9 is started to enable the rotary object placing table 2 to slowly rotate at an ultra-low speed, the annular sliding groove 13 slides on the four conductive balls 503, and the conductive balls 503 can stretch along with the dumbbell-shaped connecting rod 501 and the spring 502, so that the conductive balls 503 can be guaranteed to be always abutted against the annular sliding groove 13; when the two conductive balls 503 of the short circuit test module 6 are electrically connected with the two arc-shaped conductive sheets 14 of the circuit breaker 16, the transmission of short circuit current is realized, and the short circuit reaction condition of the circuit breaker 16 and the short circuit current value during the reaction trip can be immediately tested; when the two conductive balls 503 of the leakage test module 7 are electrically connected with the two arc-shaped conductive sheets 14 of the circuit breaker 16, the transmission of leakage current is realized, and the leakage reaction condition of the circuit breaker 16 and the leakage current value during tripping reaction can be immediately tested; the middle gap time is the interval time between the leakage test and the short circuit test, and the interval between the leakage test and the short circuit test is generally required to be not less than 5min, so that the influence on two groups of test circuits is small.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. The automatic switching device for the low-voltage circuit breaker electric leakage and short circuit test comprises a fixed base (1) and a rotary object placing table (2), and is characterized in that the fixed base (1) is specifically a cylindrical insulating hollow shell structure, a circular boss (3) is arranged at the center of the top surface of the fixed base (1), the circular boss (3) is of a shell structure, the fixed base (1) and the circular boss (3) are integrally formed and form an insulating hollow shell structure with a convex-shaped vertical section, a bearing (19) is fixedly arranged at the center of the top surface of the circular boss (3), a fixed shaft (4) is sleeved in the bearing (19), the fixed shaft (4) is vertically placed, the lower part of the fixed shaft (4) is in interference clamping in the bearing (19), and four groups of telescopic rod components (5) are further symmetrically arranged on the top surface of the fixed base (1), the four groups of telescopic rod components (5) are distributed along the circular boss (3) in a centrosymmetric manner;
any group of the telescopic rod components (5) comprises a dumbbell-shaped connecting rod (501) which is connected to the top surface of the fixed base (1) in a penetrating mode, the dumbbell-shaped connecting rod (501) is composed of a straight rod in the middle and round blocks at two ends, the round block at the bottom end of the dumbbell-shaped connecting rod (501) extends into the fixed base (1), a spring (502) is sleeved in the middle of the dumbbell-shaped connecting rod (501), the spring (502) is located between the round block at the top end of the dumbbell-shaped connecting rod (501) and the fixed base (1), and a conductive ball (503) is fixedly embedded in the top end of the dumbbell-shaped connecting rod (501);
a short circuit test module (6) and an electric leakage test module (7) are arranged inside the fixed base (1), wherein two symmetrical conductive balls (503) are respectively and electrically connected with the short circuit test module (6) through cables, and the other two conductive balls (503) are respectively and electrically connected with the electric leakage test module (7) through cables;
a motor base (8) is fixedly arranged on the outer side wall of the fixed base (1), a low-speed motor (9) is arranged at the top of the motor base (8), a vertical driving shaft (10) is arranged at the top of the low-speed motor (9), and a bevel gear (11) is arranged at the top end of the driving shaft (10);
the rotary object placing table (2) is specifically an insulated solid structure with a concave-shaped vertical section, a cylindrical groove (12) which is in sliding sleeve joint with the round boss (3) is arranged at the center of the bottom surface of the rotary object placing table (2), the top end surface of the fixed shaft (4) is fixedly connected at the central position of the cylindrical groove (12), the bottom surface of the rotary object placing table (2) is also provided with an annular sliding chute (13) which is concentric with the cylindrical groove (12), two groups of symmetrical arc conducting strips (14) are lined in the annular sliding groove (13), the radian of the arc-shaped conducting strips (14) is 5-10 degrees, the inside of the annular chute (13) except the arc-shaped conducting strips (14) is a ceramic insulator, any arc-shaped conducting strip (14) is electrically connected with a connecting piece (15) through a cable, the connecting pieces (15) are all arranged on the top surface of the rotary object placing table (2);
the top of the rotary object placing table (2) is provided with a clamp (17) clamped with a circuit breaker (16), and the circuit breaker (16) is electrically connected with the two groups of contact pieces (15);
the bottom of the outer side wall of the rotary object placing table (2) is provided with a bevel gear ring (18) which is engaged and connected with the bevel gear (11).
2. The automatic switching device for the leakage and short circuit tests of the low-voltage circuit breaker according to claim 1, characterized in that the rotation speed of the low-speed motor (9) is 1-5r/min and is divided into 5-gear rotation speed settings of 1 r/min, 2 r/min, 3 r/min, 4 r/min and 5 r/min.
3. Automatic switching device for low-voltage circuit breaker leakage and short-circuit tests according to claim 1, characterized in that the ratio of the number of teeth of said bevel gear (11) to the number of teeth of said bevel gear ring (18) ranges from 1:30 to 1: 50.
4. Automatic switching device for low-voltage circuit breaker leakage and short-circuit tests according to claim 1, characterized in that said short-circuit test module (6) is in particular a high-current short-circuit test device of type BE-XL-15000A.
5. Automatic switching device for low-voltage circuit breaker leakage and short-circuit tests according to claim 1, characterized in that said leakage test module (7) is in particular a leakage switch digital detector of the AR5406 type.
6. The automatic switching device for testing the leakage and the short circuit of the low-voltage circuit breaker according to claim 1, wherein the contact strip (15), the arc-shaped conducting strip (14) and the conducting ball (503) are all tin-plated copper.
7. The automatic switching device for the low-voltage circuit breaker leakage and short-circuit tests as claimed in claim 1, wherein the fixed base (1), the rotary object placing table (2) and the dumbbell-shaped connecting rod (501) are all made of insulating ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021026427.6U CN212808526U (en) | 2020-06-08 | 2020-06-08 | Automatic switching device for low-voltage circuit breaker electric leakage and short circuit test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021026427.6U CN212808526U (en) | 2020-06-08 | 2020-06-08 | Automatic switching device for low-voltage circuit breaker electric leakage and short circuit test |
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| CN212808526U true CN212808526U (en) | 2021-03-26 |
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| CN202021026427.6U Active CN212808526U (en) | 2020-06-08 | 2020-06-08 | Automatic switching device for low-voltage circuit breaker electric leakage and short circuit test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116908596A (en) * | 2023-08-01 | 2023-10-20 | 国网山东省电力公司沂南县供电公司 | Hand-held type photovoltaic inverter protection check gauge |
-
2020
- 2020-06-08 CN CN202021026427.6U patent/CN212808526U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116908596A (en) * | 2023-08-01 | 2023-10-20 | 国网山东省电力公司沂南县供电公司 | Hand-held type photovoltaic inverter protection check gauge |
| CN116908596B (en) * | 2023-08-01 | 2024-04-05 | 国网山东省电力公司沂南县供电公司 | Hand-held type photovoltaic inverter protection check gauge |
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