Portable tester for main circuit breaker of train

Abstract

The train main circuit breaker portable tester comprises a box body, and the surface of the box body is provided with a power switch, a main contact, an external interface, an auxiliary contact selection switch, a main circuit breaker on-off switch, a signal indicating lamp, a touch display screen and a data downloading interface. A data acquisition module is integrated in the box body and comprises a high-speed digital acquisition module and an analog small signal acquisition module; a main circuit breaker is connected through an external interface and a main contact lead, and is connected with main circuit breakers of different models through patch cords. Detection instruments are integrated together, key test data such as action time of a main circuit breaker, signal states of auxiliary contacts and resistance are acquired, digital display is performed after signals are acquired, an operation interface is simpler, rationalized and humanized, data acquisition is accurate and efficient, and time and manpower are greatly saved.

Description

Technical Field

[0001] The invention relates to an electrical equipment testing technology, in particular to a portable tester for a train main circuit breaker, which is a digital testing device for the closing and opening mechanical characteristics and state signal feedback of a circuit breaker. Background Art

[0002] At present, vehicle-mounted main circuit breakers need to undergo routine tests before leaving the factory, and they also need to undergo tests if a fault occurs during installation and use, so as to quickly locate the fault and replace the faulty component or replace the entire machine and return it to the factory for repair. Since ordinary test benches are large in size and heavy in weight, they can only be used in fixed test areas and cannot be carried on vehicles to test the main circuit breakers.

[0003] The vehicle-mounted main circuit breaker test bench is an essential test equipment for factory commissioning and routine testing of circuit breakers. The existing test bench is composed of oscilloscopes, bridge resistance testers, display instruments, operating switches and indicator lights. The debugging and test operation processes are complicated. The tester needs to observe many instruments and meters, operate the main circuit breaker, adjust the oscilloscope, detect the action waveform, action time, and calculate whether the parameters meet the requirements of the test outline, which consumes a lot of manpower and time. The tester also needs to observe the oscilloscope and resistance tester, measure the auxiliary contact resistance, oscilloscope and other instruments, which is very inconvenient.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a portable tester for a train main circuit breaker to solve the above technical problems existing in the prior art.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] The portable tester for the main train circuit breaker of the present invention comprises a box body, on the surface of which a power switch, a main contact, an external interface, an auxiliary contact selection switch, a main disconnecting and closing switch, a signal indicator light, a touch display screen and a data download interface are arranged;

[0008] A data acquisition module is integrated in the box, and the data acquisition module includes a high-speed digital acquisition module and an analog small signal acquisition module;

[0009] The main circuit breaker is connected via the external interface and the main contact lead, and is connected to main circuit breakers of different models via a switching line.

[0010] Compared with the prior art, the portable tester for train main circuit breaker provided by the present invention integrates the detection instruments together, collects key test data such as the main circuit breaker action time, auxiliary contact signal status and resistance, and displays the collected signals digitally. The operation interface is more concise, reasonable and user-friendly, and the data collection is accurate and efficient, which greatly saves time and manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is an electrical schematic diagram of a portable tester provided in an embodiment of the present invention.

[0012] Figure 2 A diagram of an operation panel of a portable tester provided in an embodiment of the present invention.

[0013] Figure 3 This is a diagram of the operation interface of the portable tester provided in an embodiment of the present invention.

[0014] In the figure:

[0015] 1. Power switch, 2. Main contact, 3. External interface, 4. Auxiliary contact selection switch, 5. Touch screen, 6. Main disconnect and close switch. DETAILED DESCRIPTION

[0016] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, which does not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0017] The contents not described in detail in the examples of the present invention belong to the prior art known to professionals in the field. If no specific conditions are specified in the examples of the present invention, the conditions are carried out according to the conventional conditions in the field or the conditions recommended by the manufacturer. If the manufacturer is not specified in the reagents or instruments used in the examples of the present invention, they are all conventional products that can be purchased commercially.

[0018] The portable tester for the main train circuit breaker of the present invention comprises a box body, on the surface of which a power switch, a main contact, an external interface, an auxiliary contact selection switch, a main disconnecting and closing switch, a signal indicator light, a touch display screen and a data download interface are arranged;

[0019] A data acquisition module is integrated in the box, and the data acquisition module includes a high-speed digital acquisition module and an analog small signal acquisition module;

[0020] The main circuit breaker is connected via the external interface and the main contact lead, and is connected to main circuit breakers of different models via a switching line.

[0021] The external interface adopts a 37-core connector, and the data download interface adopts a USB port.

[0022] The box shell is made of aluminum alloy material.

[0023] The main circuit breaker is operated by the touch display screen or the main disconnecting and closing switch key. The portable tester has at least one or more of the following functions:

[0024] Human-computer interaction function for test operation;

[0025] Opening and closing test of the main circuit breaker under test;

[0026] Display the status of main contacts and auxiliary contacts of the main circuit breaker under test;

[0027] The operating time of main contacts and auxiliary contacts of the main circuit breaker under test is displayed;

[0028] Action waveform display of main contacts and auxiliary contacts of the main circuit breaker under test;

[0029] Input and output short circuit protection.

[0030] In summary, it can be seen that the portable tester for the main circuit breaker of the train in the embodiment of the present invention is used to realize the display of the main contact status of the main circuit breaker, the display of the auxiliary contact status, the measurement of the auxiliary contact resistance, the circuit breaker closing action time and action waveform, the opening action time and action waveform test, the closing bounce time, etc. The traditional multimeter, oscilloscope, closing and opening signal sensor, bridge resistance tester and other test systems that need to be manually tested and recorded data are integrated into a digital portable test equipment, and the test test and recording interface are edited, the touch screen controls the test, and the results are directly read during the test, which is convenient and fast. The basic functions of the portable tester include: collecting the operation switch and the main contacts and auxiliary contacts of the circuit breaker, recording the number of circuit breaker operations and the action status of the main contacts and auxiliary contacts. Collect the circuit breaker coil and main contact status, record the coil, the main contact closing and opening time and the waveform of the relationship between each other. Up to 16 high-speed digital signals can be collected to realize the detection of all auxiliary contacts of the circuit breaker. By measuring the output current and the voltage between the auxiliary contacts under this condition, the auxiliary contact resistance value is automatically calculated and recorded, so as to determine whether the surface condition of the auxiliary contacts is good and whether they need to be replaced. The tester also has the function of recording and retrieving test data, which is convenient for copying and reading test data. In terms of tester safety protection, the internal data acquisition module and operation display terminal have perfect overvoltage, overcurrent and short circuit protection, which is safe and reliable.

[0031] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the embodiments of the present invention are described in detail with specific embodiments below.

[0032] The present invention designs a portable tester for train main circuit breaker, which is connected to the main circuit breaker through an external interface and a main contact, and the auxiliary contact selection realizes the selection of the auxiliary contact to be tested, and the main breaker opening and closing switch realizes the opening and closing of the main breaker. The main breaker is operated through the HMI or the main breaker opening and closing switch, and the opening and closing time, action waveform and status of the main contact and the auxiliary contact are automatically displayed.

[0033] The portable tester has a compact and integrated overall structure, diverse functions, convenient test operation, and a very broad application prospect.

[0034] Example 1

[0035] like Figure 1 , Figure 2 , Figure 3 As shown in the figure, a portable tester for train main circuit breakers, all the equipment of the test bench is integrated in an electrical box. The front of the test bench is a display terminal, operation buttons and indicator lights, and the data acquisition terminal is placed in the electrical box. The direct connection between the circuit breaker and the test bench is led out through the connector on the side of the electrical cabinet. During the debugging process, the operator closes and opens the circuit breaker at the debugging position, observes the test results, and quickly reads the closing and opening characteristic data of the main circuit breaker.

[0036] The main circuit breaker tester consists of DC110V power supply, DC24V voltage, main control board, HMI, transfer switch, connector accessories, etc.

[0037] The HMI of the main circuit breaker test device is used to realize the human-computer interaction operation of the test device and the display function of the test data. The specification is 7 inches, and it adopts the ARM A9 processor; the main controller is the main control part of the entire test device, and it integrates the high-speed real-time data acquisition module and the main circuit breaker drive module. Through the high-speed real-time acquisition of the main contacts and auxiliary contacts, the action time and action waveform of the main contacts and auxiliary contacts of the main circuit breaker are acquired. At the same time, the opening and closing of the main circuit breaker can be operated through the HMI and the main breaker opening and closing switch. The AC220V / DC110V power converter provides power for the main circuit breaker drive module of the main control unit; the AC220V / 24V power supply provides working power for the main control board.

[0038] Input voltage: AC220V / 50Hz

[0039] Input current: 5A

[0040] Main circuit breaker coil driving voltage: DC110V

[0041] Main contact test voltage: DC24V

[0042] Auxiliary contact test voltage: DC24V

[0043] Action time accuracy: 0.1ms

[0044] Waveform display: Display coil, main contact and 1 set of auxiliary contacts simultaneously

[0045] Auxiliary contact: 10NO+10NC

[0046] Dimensions: 400mmx300mmx120mm

[0047] Implementation of fast digital acquisition module and small signal acquisition module: The key equipment of the portable tester is the data acquisition module, which consists of a fast digital acquisition module and a small signal acquisition module. The fast digital acquisition module is mainly responsible for collecting the state changes of the main and auxiliary contacts of the circuit breaker, and the small signal acquisition module is mainly responsible for collecting the contact resistance of the auxiliary contacts. The main circuit breaker test device is connected to the main circuit breaker through the external interface and the main contact. The auxiliary contact selection realizes the selection of the auxiliary contacts to be tested, and the main breaker separation switch realizes the separation and closing of the main breaker. The main breaker is operated through the HMI or the main breaker separation switch, and the separation and closing time, action waveform and status of the main and auxiliary contacts are automatically displayed.

[0048] In manual test mode, the tester operator can observe the test results while debugging, and the test data will not form a test report. In automatic mode, the tester only needs to press the test button, and the test bench can automatically complete the performance test of the circuit breaker's closing and breaking under a specific air pressure. The main circuit breaker test device uses a 37-core connector to connect the main circuit breaker to the outside, and other main circuit breakers are tested through adapters.

[0049] The main circuit breaker test device shell adopts an aluminum alloy instrument box to meet the requirements of portable and vehicle-mounted testing.

[0050] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A portable tester for train main circuit breaker, characterized in that: It includes a box body, on the surface of which are provided a power switch, a main contact, an external interface, an auxiliary contact selection switch, a main disconnecting and closing switch, a signal indicator light, a touch display screen and a data download interface; A data acquisition module is integrated in the box, and the data acquisition module includes a high-speed digital acquisition module and an analog small signal acquisition module; The main circuit breaker is connected via the external interface and the main contact lead, and is connected to main circuit breakers of different models via a switching line.

2. The portable tester for train main circuit breaker according to claim 1, characterized in that: The external interface adopts a 37-core connector, and the data download interface adopts a USB port.

3. The portable tester for train main circuit breaker according to claim 2, characterized in that: The box shell is made of aluminum alloy material.

4. The portable tester for train main circuit breaker according to claim 1, 2 or 3, characterized in that: The main circuit breaker is operated by the touch display screen or the main disconnecting and closing switch key. The portable tester has at least one or more of the following functions: Human-computer interaction function for test operation; Opening and closing test of the main circuit breaker under test; Display the status of main contacts and auxiliary contacts of the main circuit breaker under test; The operating time of main contacts and auxiliary contacts of the main circuit breaker under test is displayed; Action waveform display of main contacts and auxiliary contacts of the main circuit breaker under test; Input and output short circuit protection.

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