CN213274817U - Breaker mechanical characteristic tester with auxiliary contacts - Google Patents
Breaker mechanical characteristic tester with auxiliary contacts Download PDFInfo
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- CN213274817U CN213274817U CN202022243570.7U CN202022243570U CN213274817U CN 213274817 U CN213274817 U CN 213274817U CN 202022243570 U CN202022243570 U CN 202022243570U CN 213274817 U CN213274817 U CN 213274817U
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Abstract
The utility model provides a take circuit breaker mechanical characteristic tester of auxiliary contact for test circuit breaker divide-shut brake speed, including power module, CPU, memory and clock module, still include base, shell, positive panel, test wire, keyboard module, AD conversion module, display screen, sensitization module, printer, direct current output drive module, direct current output port, time test port, data IO interface and auxiliary contact device. The utility model discloses a substantive effect is: 1) the brightness of the display screen can be automatically adjusted according to the ambient brightness; 2) the auxiliary contact device for detecting the displacement of the movable contact of the circuit breaker is additionally arranged, so that the technical problem that the signal acquisition device cannot be installed when the circuit breaker supporting frame is installed at other positions such as the back face is solved.
Description
Technical Field
The utility model belongs to the technical field of the electrical component detects technique and specifically relates to indicate a take circuit breaker mechanical properties tester of auxiliary contact.
Background
According to statistics of high-voltage switch accidents by the national institute of electrical power science, it is shown that 80% of high-voltage circuit breaker failures are caused by poor mechanical characteristics, and meanwhile, along with the development of high-voltage circuit breaker technology, the failure rate of a body is greatly reduced, the failures are mainly concentrated on an operating mechanism part, and the action condition of the operating mechanism can be accurately reflected through a mechanical characteristic test, so that the characteristic detection must be regularly carried out according to a plan to check the mechanical action condition, namely, the completeness of the operating mechanism is detected. The mechanical characteristics and the action characteristics of the high-voltage circuit breaker and the operating mechanism of the high-voltage circuit breaker are tested and subjected to data analysis, and the reliability of the circuit breaker can be judged, so that hidden dangers can be found early, equipment accidents are avoided, and the safe and stable operation of a system is guaranteed.
The breaker characteristic test is divided into a mechanical characteristic test and a low voltage test. The method mainly comprises the steps of testing the opening and closing time reflecting mechanical characteristics, the opening and closing different-phase degree, the opening and closing speed, mechanical parameters of a circuit breaker and coil action voltage reflecting low-voltage characteristics. The overall health level of the circuit breaker is detected. The opening and closing speed is the speed of the moving contact of the circuit breaker in opening and closing motion. The switching-on and switching-off speed has two meanings, one is the average speed, namely the ratio of the moving distance and the moving time of the moving contact of the circuit breaker is calculated; the other is just opening and closing speed, namely the instantaneous speed of the moving and static contacts of the circuit breaker just opening/contacting, and the just opening and closing speed is directly related to the arc quenching capacity of the circuit breaker. When the contact head moves at a high speed, the moving mechanism is subjected to excessive mechanical stress, so that individual parts are damaged. At the same time, the contact bounce time is lengthened due to strong impact and mechanical vibration. If the separation velocity is too low, the arcing time increases and various electrical accidents occur.
The current widely adopted experimental method is to use a special mechanical characteristic tester of the circuit breaker. During testing, the control power supply is removed, the circuit breaker is disconnected with other secondary devices, the testing instrument is used for connecting the switching-off and switching-on loops of the circuit breaker in series, the control instrument outputs direct-current voltage to operate the circuit breaker to act, and meanwhile, the signal acquisition device connected to the circuit breaker body acquires and analyzes data to finally obtain a test result. However, the signal acquisition device of the existing circuit breaker mechanical characteristic tester needs to be installed on the support frame right below the moving/fixed contact of the circuit breaker, and the technical problems that the precision is not high and the signal acquisition device cannot be installed once the circuit breaker support frame is installed at other positions such as the back face and the like exist.
In order to solve the technical problem, publication number CN202025071U discloses a high-precision circuit breaker tester, which belongs to the technical field of power supply devices and comprises a voltage collector, a voltage filter, a current collector, a current filter, an a/D converter, a single chip microcomputer, a memory, a display and a keyboard, wherein the voltage collector is connected with a pin of the AD converter through the voltage filter, the current collector is connected with a pin of the a/D converter through the current filter, the AD converter is connected with the single chip microcomputer, and the memory is connected with the single chip microcomputer pin. The bit operation test program is that firstly the single chip sends an acquisition command to the A/D converter, then the circuit breaker is controlled to carry out switching-on or switching-off operation, after the voltage and current signals are acquired, the A/D converter converts the signals, the single chip carries out data processing, the processed data is stored in a memory, and finally the single chip calls the test data to carry out data analysis and judgment. However, the circuit breaker tester still cannot solve the technical problem that the circuit breaker support frame cannot be provided with the signal acquisition device when being arranged at other positions such as the back surface.
Disclosure of Invention
In order to solve the technical problem that the precision of the existing general circuit breaker mechanical characteristic tester is not high and the signal acquisition device cannot be installed once the circuit breaker support frame is installed at other positions such as the back, the utility model provides a circuit breaker mechanical characteristic tester with auxiliary contacts for test circuit breaker opening and closing speed, including power module, CPU, memory and clock module, still include base, shell, positive panel, test wire, keyboard module, AD conversion module, display screen, printer, direct current output drive module, direct current output port, time test port, data I/O interface and auxiliary contact device, the shell is installed on the base, the positive panel is inlayed on the shell, power module, CPU, memory, clock module, AD conversion module, printer, data I/O interface and auxiliary contact device, And the direct current output drive module is arranged in the shell, an output port, a direct current output port, a time test port and a data I/O interface of the keyboard module, the display screen and the printer are all installed on the front panel, the test line is connected with the time test port and the circuit breaker, the memory, the clock module, the keyboard module, the A/D conversion module, the display screen, the printer, the direct current output drive module and the data I/O interface are all connected with the CPU, the direct current output port is connected with the direct current output drive module, the time test port is connected with the A/D conversion module, the auxiliary contact device is connected with the time test port, and the power supply module supplies power for other parts. The A/D conversion module converts the collected analog signals into digital signals composed of 0 and 1 for the CPU to read, the power supply comprises a storage battery, an external power line and the like, and belongs to the prior art, and the auxiliary contact device is used for detecting the displacement of the movable contact of the transformer.
Preferably, the direct current output port comprises an opening output end, a closing output end and a negative end, the opening output end is connected with the opening coil of the circuit breaker and then is connected to the negative end, and the closing output end is connected with the closing coil of the circuit breaker and then is connected to the negative end. When the voltage on the coil reaches a certain value U, the armature on the coil impacts a switching-on/switching-off operating mechanism of the circuit breaker to complete switching-on/switching-off.
Preferably, the time test ports include seven ports, namely, a1, a2, B1, B2, C1, C2 and F, and the ports of a1, a2, B1, B2, C1, C2 and F all include a positive terminal and a negative terminal. The optimal scheme can be used for simultaneously testing the mechanical characteristics of two three-phase circuit breakers, and the F-path port is specially used for detecting the time parameter of the auxiliary contact and reducing the error by referring to the closing time parameter of the actual circuit breaker.
Preferably, the display screen further comprises a photosensitive module, the photosensitive module is connected with the CPU, the photosensitive module is mounted on the front panel, and the CPU adjusts the brightness of the display screen according to brightness information fed back by the photosensitive module. According to the display screen brightness automatic adjustment system, the brightness of the display screen can be automatically adjusted according to different working environments, and the optimal scheme enables a user to clearly see information on the display screen under various environments without manually adjusting the brightness.
As preferred, the auxiliary contact device includes base, mount, movable rod, resetting means and sensor, the mount is fixed with the base is fixed with the circuit breaker, be equipped with in the base with the spout that the movable rod matches, the movable rod passes through resetting means with base swing joint, the sensor is installed in the spout, the sensor detects the displacement volume of movable rod and spread into AD conversion module. The movable rod is in when the circuit breaker is in the separating brake state with canceling release mechanical system compression to the biggest elastic deformation volume A back and the movable contact bottom butt of circuit breaker, the base passes through the mounting bracket is installed on the circuit breaker shell, the mounting bracket can realize through two connecting rods and appropriate bolt with the fixed of circuit breaker shell.
Preferably, the return device is a spring, and the spring is connected with the base and the movable rod.
Preferably, the resetting device comprises an air pump and an electromagnetic valve, and the air pump controls the air pressure in the base through the electromagnetic valve.
Preferably, the direct current output display and the direct current output adjusting knob are both connected with the CPU, and are mounted on the front panel. The circuit breaker of different models, the rated operating voltage of combined floodgate/separating brake coil is also different, and this preferred scheme makes the utility model is suitable for a mechanical characteristics test of various circuit breakers.
The utility model discloses a substantive effect is: 1) the brightness of the display screen can be automatically adjusted according to the ambient brightness; 2) the auxiliary contact device for detecting the displacement of the movable contact of the circuit breaker is additionally arranged, so that the technical problem that the signal acquisition device cannot be installed when the circuit breaker supporting frame is installed at other positions such as the back face is solved.
Drawings
FIG. 1 is a schematic diagram of the composition of the embodiment.
FIG. 2 is a schematic structural diagram of an embodiment.
Fig. 3 is a schematic view of an auxiliary contact mounting according to an embodiment.
In the figure: 1. the automatic testing device comprises a shell, 2, a printer output port, 3, a photoresistor, 4, an automatic/manual selection end, 5, a data I/O interface, 6, a time testing port, 7, a direct current output port, 8, a negative end, 9, a direct current output adjusting knob, 10, a circuit breaker static contact, 11, a circuit breaker movable contact, 12, a base, 13, a testing line, 100, a CPU, 200, a memory, a 300 display screen, 400, a printer, 500, a keyboard module and 600, and a photosensitive module.
Detailed Description
The invention is further described with reference to the following figures and examples.
In a first embodiment, as shown in fig. 1 or fig. 2, a circuit breaker mechanical characteristic tester with auxiliary contacts is used for testing the switching speed of a circuit breaker, and includes a power module, a CPU100, a memory 200, a clock module, a base, a housing 1, a front panel, a test line 13, a keyboard module 500, an a/D conversion module, a display screen 300, a photosensitive module 600, a dc output display, a printer 400, a dc output driving module, a dc output port 7, a time testing port 6, a data I/O interface, and an auxiliary contact device, where the housing 1 is mounted on the base, the front panel is embedded in the housing 1, the power module, the CPU100, the memory 200, the clock module, the a/D conversion module, the printer 400, and the dc output driving module are all disposed in the housing 1, and the photosensitive module 600 is photosensitive and converts into an electrical signal through a photosensitive resistor 3, the keyboard module 500, the display screen 300, the direct current output display, the photoresistor 3, the direct current output adjusting knob 9, the printer output port 2, the direct current output port 7, the time test port 6 and the data I/O interface are all installed on a front panel, the test line 13 is connected with the time test port 6 and the circuit breaker, the memory 200, the clock module, the keyboard module 500, the A/D conversion module, the display screen 300, the photosensitive module 600, the direct current output display, the printer 400, the direct current output driving module and the data I/O interface are all connected with the CPU100, the direct current output port 7 is connected with the direct current output driving module, the time test port 6 is connected with the A/D conversion module, the auxiliary contact device is connected with the time test port 6, and the power supply module supplies power for other parts. The user can select whether the on-off operation is controlled by the instrument or the external control on-off operation through the automatic/manual selection end 4. The time test port 6 comprises seven ports including A1, A2, B1, B2, C1, C2 and F, and the ports of A1, A2, B1, B2, C1, C2 and F all comprise a positive terminal and a negative terminal 8.
As shown in fig. 3, the auxiliary contact device includes a base 12, a fixing frame, a movable rod, a reset device and a sensor, wherein the fixing frame is fixed to fix the base 12 and the circuit breaker, a sliding groove matched with the movable rod is formed in the base 12, the movable rod passes through the reset device and is movably connected with the base 12, the sensor is installed in the sliding groove, and the sensor detects the displacement of the movable rod and transmits the displacement into the a/D conversion module. The movable rod is in when the circuit breaker is in the separating brake state with canceling release mechanical system compression to maximum elastic deformation volume 40.0cm back and the movable contact bottom butt of circuit breaker, base 12 passes through the mounting bracket is installed on circuit breaker shell 1, the mounting bracket is fixed with the bottom of circuit breaker shell 1 through two connecting rods and bolt. The static contact 11 and the auxiliary contact of the circuit breaker are respectively connected with the ends of the time test ports 6A1 and F through corresponding connecting wires, and the static contact 10 of the circuit breaker is connected with the negative end.
When the breaker is in an opening state, rated voltage is applied to two ends of a closing coil of the breaker through an instrument or other external devices, a time testing end has no signal before the breaker is closed, and after the breaker is closed, the time testing end detects an electric signal to obtain closing time T, in the closing process of the breaker, an auxiliary contact connecting rod moves along with a static point 11 of the breaker to obtain a moving space, until the closing is completed, the connecting rod is abutted against the bottom end of the static point 11 of the breaker again, so that the displacement X of a movable contact is obtained through a sensor in a base 12, closing speed can be calculated according to X and T, and the opening process can be similarly obtained.
The above detailed description is provided for illustrative purposes, and is not intended to limit the invention, which is within the spirit of the invention and the scope of the appended claims.
Claims (8)
1. The utility model provides a take circuit breaker mechanical characteristic tester of auxiliary contact for test circuit breaker divide-shut brake speed, includes power module, CPU, memory and clock module, its characterized in that: still include base, shell, positive panel, test line, keyboard module, AD conversion module, display screen, printer, direct current output drive module, direct current output port, time test port, data IO interface and auxiliary contact device, the shell is installed on the base, the positive panel is inlayed on the shell, power module, CPU, memory, clock module, AD conversion module, printer and direct current output drive module all arrange in the shell, the delivery outlet, direct current output port, time test port, the data IO interface of keyboard module, display screen, printer are all installed on the positive panel, the test line is connected time test port and circuit breaker, memory, clock module, keyboard module, AD conversion module, Display screen, printer, direct current output driver module and data I/O interface all with CPU connects, direct current output port with direct current output driver module connects, the time test port with AD conversion module connects, auxiliary contact device with the time test port is connected, power module is the power supply of other parts.
2. The mechanical property tester for the circuit breaker with the auxiliary contact according to claim 1, wherein: the direct current output port comprises an opening output end, a closing output end and a negative end, the opening output end is connected with the opening coil of the circuit breaker and then is connected with the negative end, and the closing output end is connected with the closing coil of the circuit breaker and then is connected with the negative end.
3. The mechanical property tester for the circuit breaker with the auxiliary contact according to claim 2, wherein: the time test ports comprise seven ports including A1, A2, B1, B2, C1, C2 and F, and the ports of A1, A2, B1, B2, C1, C2 and F all comprise a positive end and a negative end.
4. The mechanical property tester for the circuit breaker with the auxiliary contact according to claim 1, wherein: the LED display screen further comprises a photosensitive module, the photosensitive module is connected with the CPU, the photosensitive module is installed on the front panel, and the CPU adjusts the brightness of the display screen according to brightness information fed back by the photosensitive module.
5. The mechanical property tester for the circuit breaker with the auxiliary contact according to claim 1, wherein: the auxiliary contact device comprises a base, a fixing frame, a movable rod, a reset device and a sensor, wherein the fixing frame is fixed to fix the base and the circuit breaker, a sliding groove matched with the movable rod is formed in the base, the movable rod passes through the reset device and the base is movably connected, the sensor is installed in the sliding groove, and the sensor detects the displacement of the movable rod and transmits the displacement into the AD conversion module.
6. The mechanical property tester for the circuit breaker with the auxiliary contact according to claim 5, wherein: the reset device is a spring, and the spring is connected with the base and the movable rod.
7. The mechanical property tester for the circuit breaker with the auxiliary contact according to claim 5, wherein: the resetting device comprises an air pump and an electromagnetic valve, and the air pump controls the air pressure in the base through the electromagnetic valve.
8. The mechanical property tester for the circuit breaker with the auxiliary contact according to claim 1, wherein: the direct current output display and the direct current output adjusting knob are connected with the CPU, and the direct current output display and the direct current output adjusting knob are installed on the front panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022243570.7U CN213274817U (en) | 2020-10-10 | 2020-10-10 | Breaker mechanical characteristic tester with auxiliary contacts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022243570.7U CN213274817U (en) | 2020-10-10 | 2020-10-10 | Breaker mechanical characteristic tester with auxiliary contacts |
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| Publication Number | Publication Date |
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| CN213274817U true CN213274817U (en) | 2021-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022243570.7U Active CN213274817U (en) | 2020-10-10 | 2020-10-10 | Breaker mechanical characteristic tester with auxiliary contacts |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061924A (en) * | 2021-10-18 | 2022-02-18 | 国网山东省电力公司淄博供电公司 | One-key type quick tester for mechanical characteristics of circuit breaker |
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2020
- 2020-10-10 CN CN202022243570.7U patent/CN213274817U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061924A (en) * | 2021-10-18 | 2022-02-18 | 国网山东省电力公司淄博供电公司 | One-key type quick tester for mechanical characteristics of circuit breaker |
| CN114061924B (en) * | 2021-10-18 | 2023-11-03 | 国网山东省电力公司淄博供电公司 | Quick tester for mechanical characteristics of one-key circuit breaker |
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