A switch machine current testing system and apparatus

Abstract

The utility model provides a kind of switching machine current test system and device, belong to switching machine current test technical field, including voltage regulating circuit and control circuit, rectifier, positioning contactor, positioning circuit breaker, positioning action line are connected in proper order, common line, positioning ammeter, positioning shunt, positioning circuit breaker, positioning contactor, rectifier are connected in proper order, constitute positioning action loop;Rectifier, reverse position contactor, reverse position circuit breaker and common line are connected in proper order, reverse position action line, reverse position ammeter, reverse position shunt, reverse position circuit breaker, reverse position contactor and rectifier are connected in proper order, constitute reverse position action loop.The utility model is to the current characteristic of ZD-7C type switching machine action current, friction current, by the wide range voltage regulating ability of voltage regulator and rectifier, can directly monitor its key parameter, ensure that test data and actual working condition are consistent, provide reliable basis for the quality detection of ZD-7C type switching machine.

Description

Technical Field

[0001] This utility model belongs to the field of switch machine current testing technology, and in particular relates to a switch machine current testing system and device. Background Technology

[0002] In railway signaling systems, switch machines are the core equipment for controlling turnout switching, and their performance directly affects train operation safety. The current parameters of switch machines (such as operating current and friction current) are key indicators for measuring their working status and need to be accurately tested before leaving the factory, after maintenance, or during on-site maintenance.

[0003] Currently, DC switch machine testing equipment mainly targets ZD-6, ZD-7A electric switch machines, and ZY hydraulic switch machines. These models have relatively low current parameters: the operating current of ZD-6 and ZY DC hydraulic switch machines is generally ≤2A, and the friction current is ≤2.9A; the operating current of the ZD-7A switch machine is ≤6A, and the friction current is 7.8A~8.7A. However, with the increasing demands on turnout switching efficiency in railway transportation, the humpback switch machine has been upgraded from the ZD-7A model to the ZD-7C model. This model has significantly improved current parameters, with an operating current ≤11A and a friction current of 13.5A~16A.

[0004] Due to design limitations, existing testing equipment can only test whether the ZD-7C switch machine is functioning normally when testing it. It cannot accurately detect its key parameters and therefore cannot meet the testing requirements of the ZD-7C switch machine. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model aims to propose a switch machine current testing system and device to meet the requirements for accurate testing of ZD-7C type switch machines, while also being compatible with the basic testing needs of ZD-6 type, ZD-7A type electric switch machines and ZY type hydraulic switch machines.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A switch machine current testing system includes a main circuit breaker connected to an external power source. The main circuit breaker, a voltage regulator, and a rectifier are connected in sequence to form a voltage regulating circuit. A voltmeter is connected in parallel between the positive and negative terminals of the rectifier. The voltage regulator output terminal, AC circuit breaker, and stop button are connected in sequence. The stop button is connected to the positioning button, the reverse button, the positioning contactor, and the reverse contactor, respectively. The positioning button is connected to the normally open contact of the positioning contactor, the reverse button is connected to the normally closed contact of the positioning contactor, and the normally closed contact of the positioning contactor is connected to the normally open contact of the reverse contactor, thus forming a control circuit. The rectifier positive terminal, positioning contactor, positioning circuit breaker, positioning action line and positioning side of switch machine motor are connected in sequence. The common terminal of switch machine motor is connected to common line. The common line, positioning ammeter, positioning shunt, positioning circuit breaker, positioning contactor and rectifier negative terminal are connected in sequence to form positioning action circuit. The positive terminal of the rectifier, the reverse contactor, the reverse circuit breaker, and the common line are connected in sequence. The reverse side of the switch machine motor, the reverse action line, the reverse ammeter, the reverse shunt, the reverse circuit breaker, the reverse contactor, and the negative terminal of the rectifier are connected in sequence to form a reverse action circuit.

[0007] Furthermore, a positioning indicator light is connected in series between the normally open contact of the positioning contactor and the normally closed contact of the reversing contactor, and a reversing indicator light is connected in series between the normally open contact of the reversing contactor and the normally closed contact of the positioning contactor.

[0008] Furthermore, the normally closed contact of the reverse contactor is connected to the normally open contact of the positioning contactor.

[0009] A switch machine current testing device includes a housing, on which a control board is provided. The control board is equipped with a voltage regulator panel, a main circuit breaker, an AC circuit breaker, a positioning shunt, a reverse positioning circuit breaker, a stop button, a positioning button, a reverse positioning button, a positioning indicator light, a reverse positioning indicator light, a positioning ammeter, a reverse positioning ammeter, and a voltmeter. The voltage regulator body, positioning contactor, reverse positioning contactor, positioning shunt, and reverse positioning shunt of the voltage regulator are installed inside the housing.

[0010] Furthermore, the housing is equipped with a partition, with a control unit above the partition and a storage unit below it. The switch machine current testing system is located inside the control unit, and the voltage regulator body is mounted on the partition via a bracket.

[0011] Furthermore, each of the brackets includes a connecting plate, a mounting base, a screw, a first fastening nut, and a second fastening nut. The mounting base is mounted on the partition plate, and the mounting base is threaded to one end of the screw. The other end of the screw passes through the first fastening nut, the connecting plate, and is threaded to the second fastening nut in sequence. The connecting plate is mounted on the regulator body.

[0012] Furthermore, a control board is installed on one side of the control unit, and an opening and closing door is installed on the opposite side of the control board. One side of the opening and closing door is hinged to the housing.

[0013] Furthermore, a set of double doors is provided on one side of the storage section, and the double doors are hinged to the cabinet.

[0014] Furthermore, one side of the housing is provided with a test channel for the positioning action line, the reverse action line and the common line to pass through, and the outlet of the test channel is provided with a dust cover.

[0015] Furthermore, the control panel is equipped with heat dissipation windows, and the bottom of the housing is equipped with casters.

[0016] Compared with the prior art, the switch machine current testing system and device of this utility model have the following advantages: This invention addresses the high-current characteristics of the ZD-7C switch machine, specifically its operating current (≤11A) and friction current (13.5A~16A). The testing system, through the wide-range voltage adjustment capabilities of the voltage regulator and rectifier, can directly monitor key parameters, ensuring that the test data matches the actual operating conditions and providing a reliable basis for the quality inspection of the ZD-7C switch machine before it leaves the depot. Simultaneously, the adjustable voltage adapts to the primary testing needs of low-current switch machines such as the ZD-6 (operating current ≤2A), ZD-7A (friction current 7.8A~8.7A), and ZY (friction current ≤2.9A). Testing of different switch machine models can be completed without replacing equipment, reducing equipment investment costs and improving testing efficiency.

[0017] The testing system is centrally installed in the control unit of the enclosure. The control board integrates operating buttons, ammeters, indicator lights, and other components, enabling "one-stop" operation and avoiding the cumbersome process of temporary wiring for traditional distributed instruments. The contactor interlocking mechanism eliminates the risk of short circuits caused by simultaneous operation of two circuits. Together with circuit breakers, stop buttons, and other protective components, it ensures operational safety from the circuit level.

[0018] The enclosure design, along with the test channels and pulleys, not only enables the orderly storage of test lines and tools but also enhances the mobility of the equipment, adapting to the diverse testing needs of railway sites. Attached Figure Description

[0019] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 Circuit diagram of the test system provided in the embodiments of this utility model; Figure 2 A schematic diagram of the box structure provided for an embodiment of this utility model; Figure 3 This is a schematic diagram of the interior of the box provided in an embodiment of the present utility model; Figure 4 for Figure 3 Enlarged view of part A in the middle.

[0020] Explanation of reference numerals in the attached figures: 1. Main circuit breaker; 2. Voltage regulator; 3. Rectifier; 4. Stop button; 5. AC circuit breaker; 6. Position button; 7. Reverse position button; 8. Position contactor; 9. Position circuit breaker; 10. Position ammeter; 11. Position shunt; 12. Reverse position contactor; 13. Reverse position circuit breaker; 14. Reverse position ammeter; 15. Reverse position shunt; 16. Position indicator light; 17. Reverse position indicator light; 18. Voltmeter; 19. Enclosure; 20. Control panel; 21. Voltage regulating plate; 22. Voltage regulator body; 23. Partition; 24. Bracket; 25. Connecting plate; 26. Mounting base; 27. Screw; 28. Fastening nut one; 29. ​​Fastening nut two; 30. Opening door; 31. Double door; 32. Test channel; 33. Dust cover; 34. Heat dissipation window. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figures 1 to 4As shown, a switch machine current testing system includes a main circuit breaker 1 connected to an external power source. The main circuit breaker 1, voltage regulator 2, and rectifier 3 are connected in sequence to form a voltage regulating circuit. A voltmeter 18 is connected in parallel between the positive and negative terminals of the rectifier 3. The output terminal of the voltage regulator 2, the AC circuit breaker 5, and the stop button 4 are connected in sequence. The stop button 4 is connected to the normally open contact of the positioning contactor 8 and the normally open contact of the reverse contactor 12, respectively. The output terminal of the stop button 4 is connected to the input terminals of the positioning button 6 and the reverse button 7, respectively. The output terminal of the positioning button 6 is connected to the normally open contact of the positioning contactor 8, the output terminal of the reverse button 7 is connected to the normally closed contact of the positioning contactor 8, and the normally closed contact of the positioning contactor 8 is connected to the normally open contact of the reverse contactor 12, thus forming a control circuit. The positive terminal of the rectifier 3, the positioning contactor 8, the positioning circuit breaker 9, and the positioning action line are sequentially connected to the positioning side of the switch machine motor. The common terminal of the switch machine motor is connected to the common line. The common line, the positioning ammeter 10, the positioning shunt 11, the positioning circuit breaker 9, the positioning contactor 8, and the negative terminal of the rectifier 3 are sequentially connected to form a positioning action circuit. The positive terminal of the rectifier 3, the reverse contactor 12, the reverse circuit breaker 13 and the common line are connected in sequence. The reverse side of the switch machine motor, the reverse action line, the reverse ammeter 14, the reverse shunt 15, the reverse circuit breaker 13, the reverse contactor 12 and the negative terminal of the rectifier 3 are connected in sequence to form a reverse action circuit. A positioning indicator light 16 is connected in series between the normally open contact of the positioning contactor 8 and the normally closed contact of the reversing contactor 12, and a reversing indicator light 17 is connected in series between the normally open contact of the reversing contactor 12 and the normally closed contact of the positioning contactor 8.

[0026] Positioning action line X1, reversing action line X2, and common line X4 are connected to each component via connecting terminals.

[0027] In a preferred embodiment of this utility model, the specific component models involved are as follows: Main circuit breaker 1 and AC circuit breaker 5 specifications: AC 220V, 25A; Positioning circuit breaker 9 and reverse positioning circuit breaker 10 specifications: DC 220V, 20A; Voltage regulator model 2: TDGC2-5KVA; Rectifier 3 (with heat sink) Model: MDQ100A; Positioning contactor 8 and reversing contactor 12, model: CJX2-4011 AC220V; Positioning ammeter 10 and reversing ammeter 14, model: OHR-300Q-DC-25A; Voltmeter Model 18: OHR-D300Q-DC-V5-A; Stop button 4, Position button 6, Reverse button 7 Specifications: AC 220V; Position indicator 16; Reverse position indicator 17 Specification: AC 220V.

[0028] The specific working process of the switch machine current testing system: After the external power supply is connected through the main circuit breaker 1, the voltage regulator 2 adjusts the output voltage according to the switch machine model (e.g., ZD-7A and ZD-7C require DC180V, ZD-6 requires DC160V), and then the voltage is converted into DC voltage by the rectifier 3; the voltmeter 18 monitors and displays the rectifier output voltage in real time to ensure that it meets the test requirements.

[0029] Positioning action trigger: After closing the main circuit breaker 1 and AC circuit breaker 5, press the positioning button 6. The control current path is: output terminal of voltage regulator 2 → AC circuit breaker 5 → stop button 4 → positioning button 6 → normally open contact NO of positioning contactor 8 → coil of positioning contactor 8. The coil of positioning contactor 8 is energized and closes, and its main contacts L1-T1 and L2-T2 close, and the main circuit of positioning action is turned on.

[0030] The main circuit for positioning operation is as follows: Rectifier 3 positive terminal → Positioning contactor 8 main contact L1-T1 → Positioning circuit breaker 9 → Positioning operation line X1 → Switch machine motor positioning side → Common line X4 → Positioning ammeter 10 → Positioning shunt 11 → Positioning contactor 8 main contact T2-L2 → Rectifier 3 negative terminal. The positioning ammeter 10 monitors the operating current (e.g., ≤11A for ZD-7C type) and friction current (e.g., 13.5A~16A for ZD-7C type) to ensure parameters meet standards.

[0031] Reverse position trigger: Pressing the reverse position button 7 controls the current path as follows: output terminal of voltage regulator 2 → AC circuit breaker 5 → stop button 4 → reverse position button 7 → normally closed contact NC of positioning contactor 8 → normally open contact NO of reverse position contactor 12 → coil of reverse position contactor 12. The coil of reverse position contactor 12 is energized and closed, its main contacts L1-T1 and L2-T2 close, and the main circuit is connected.

[0032] Reverse position operation main circuit: Rectifier 3 positive terminal → Reverse position contactor 12 main contact L1-T1 → Reverse position circuit breaker 13 → Common line X4 → Switch machine motor common terminal → Reverse position side → Reverse position operation line X2 → Reverse position ammeter 14 → Reverse position shunt 15 → Reverse position contactor 12 main contact T2-L2 → Rectifier 3 negative terminal. The reverse position ammeter 14 monitors the reverse position operation current and friction current, achieving real-time parameter feedback.

[0033] Electrical interlock: When the positioning contactor 8 is engaged, its normally closed contact NC is opened, cutting off the control circuit of the reverse contactor 12; when the reverse contactor 12 is engaged, its normally closed contact NC is opened, cutting off the control circuit of the positioning contactor 8, preventing both from operating simultaneously and causing a short circuit.

[0034] Stop control: Pressing the stop button 4 interrupts the control circuit current, de-energizes the coil of the positioning contactor 8 or the reverse contactor 12, opens the main contacts, and stops the switch machine from operating; at the same time, the positioning indicator and the reverse indicator light go out according to the contactor contact status, indicating that the operation has stopped.

[0035] Status indication: When the positioning contactor 8 is engaged, the positioning indicator light 16 forms a path with the normally closed contact NC of the reverse position contactor 12 through its normally open contact NO, and the indicator light is lit to indicate the positioning action status. When the reverse contactor 12 is engaged, the reverse indicator light 17 forms a path with the normally closed contact NC of the positioning contactor 8 through its normally open contact NO, and the indicator light illuminates to indicate the reverse operation status.

[0036] In a preferred embodiment of this utility model, the normally closed contact NC of the reverse contactor 12 is connected to the normally open contact NO of the positioning contactor 8.

[0037] Specifically, the normally closed contact NC of the reverse contactor 12 is connected to the normally open contact NO of the positioning contactor 8, and the normally open contact NO of the reverse contactor 12 is connected to the normally closed contact NC of the positioning contactor 8, thus forming an electrical interlocking mechanism between the contactors.

[0038] When the positioning contactor 8 is engaged, its normally open contact NO closes and its normally closed contact NC opens. At this time, in the control circuit of the reverse position contactor 12, because the normally closed contact NC of the positioning contactor 8 is open, even if the reverse position button 7 is accidentally pressed, the coil of the reverse position contactor 12 cannot be energized and engaged, ensuring that the reverse position main circuit will not be turned on.

[0039] When the reverse contactor 12 is engaged, its normally open contact NO closes and its normally closed contact NC opens. At this time, in the control circuit of the positioning contactor 8, because the normally closed contact NC of the reverse contactor 12 is open, even if the positioning button 6 is accidentally pressed, the coil of the positioning contactor 8 cannot be energized and engaged, ensuring that the positioning main circuit will not be turned on.

[0040] By interlocking the positioning contactor 8 with the reverse positioning contactor 12, it can be ensured that only one operating circuit is connected in each test, avoiding interference between the current signals of the two circuits and ensuring the monitoring accuracy of the operating current and friction current by the positioning ammeter 10 and the reverse positioning ammeter 14.

[0041] A switch machine current testing device includes a housing 19, on which a control board 20 is provided. The control board 20 is equipped with a voltage regulator 2's regulating plate 21, a main circuit breaker 1, an AC circuit breaker 5, a positioning shunt 11, a reverse positioning circuit breaker 13, a stop button 4, a positioning button 6, a reverse positioning button 7, a positioning indicator light 16, a reverse positioning indicator light 17, a positioning ammeter 10, a reverse positioning ammeter 14, and a voltmeter 18. The voltage regulator 2's regulating body 22, positioning contactor 8, reverse positioning contactor 12, positioning shunt 11, and reverse positioning shunt 15 are installed inside the housing 19.

[0042] Specifically, the voltage regulating panel 21 is located in the middle of the control board 20, the main circuit breaker 1 and the AC circuit breaker 5 are located on one side of the voltage regulating panel 21, and the positioning shunt 11 and the reverse position circuit breaker 13 are located on the other side of the voltage regulating panel 21. The voltage regulating panel 21 is equipped with a positioning button 6, a positioning indicator light 16, a stop button 4, a reverse position button 7 and a reverse position ammeter 14. The positioning button 6 and the positioning indicator light 16 are equipped with a positioning ammeter 10, the reverse position button 7 and the reverse position ammeter 14 are equipped with a reverse position ammeter 14, and the stop button 4 is equipped with a voltmeter 18.

[0043] In a preferred embodiment of this utility model, the housing 19 is provided with a partition 23, with a control unit above the partition 23 and a storage unit below it. The switch machine current testing system is located in the control unit, and the voltage regulator body 22 is mounted on the partition 23 via a bracket 24.

[0044] Specifically, the control unit is used to install the core components of the switch machine current testing system, providing independent installation space for the components and avoiding interference with other parts.

[0045] The storage section serves as an accessory storage area, where test connection cables, tools, switch machine spare parts, etc., can be stored to achieve classified management of test equipment and auxiliary items.

[0046] In this embodiment, there are two brackets 24. The brackets 24 can be adjusted in height or angle to fit the installation size of the voltage regulator, ensuring that their relative positions with other components in the control unit are reasonable and facilitating overall wiring.

[0047] In a preferred embodiment of this utility model, each bracket 24 includes a connecting plate 25, a mounting base 26, a screw 27, a first fastening nut 28, and a second fastening nut 29. The mounting base 26 is mounted on the partition plate 23. The mounting base 26 is threadedly connected to one end of the screw 27. The other end of the screw 27 passes through the first fastening nut 28, the connecting plate 25, and is threadedly connected to the second fastening nut 29 in sequence. The connecting plate 25 is mounted on the pressure regulator body 22.

[0048] Specifically, the connecting plate 25 can be L-shaped for easy installation. The screw 27 is threadedly connected to the mounting base 26. The extension length of the screw 27 can be adjusted by rotating it, thereby changing the installation height of the voltage regulator body 22 to adapt to the layout requirements of different components in the control section and ensure reasonable wiring space between components.

[0049] The fastening nuts 28 and 29 are threaded together with the screw 27 to clamp the connecting plate 25, thus firmly fixing the pressure regulator body 22 onto the screw 27 and preventing it from shaking during equipment movement or operation.

[0050] In a preferred embodiment of the present invention, a control board 20 is installed on one side of the control unit, and an opening and closing door 30 is installed on the opposite side of the control board 20. One side of the opening and closing door 30 is hinged to the housing 19.

[0051] Specifically, operators can directly access the core components inside the control unit by opening the opening and closing door 30, facilitating maintenance work such as wiring checks, component replacement, and troubleshooting. When closed, the opening and closing door 30 and the enclosure 19 form a closed space, reducing the entry of external dust and moisture into the control unit and preventing electrical components from experiencing poor contact or short circuits due to moisture or dust accumulation. This is especially suitable for the dusty and humid testing environment at railway sites.

[0052] In a preferred embodiment of the present invention, a set of double doors 31 are provided on one side of the storage section, and the double doors 31 are hinged to the box body 19.

[0053] Specifically, the double doors 31 are connected to the housing 19 via a hinged structure. When closed, they can completely seal the storage compartment, forming an independent enclosed space. When opened, they provide a larger operating opening, making it easier for operators to quickly access or store longer test cables.

[0054] In a preferred embodiment of the present invention, a test channel 32 is provided on one side of the housing 19 for the positioning action line X1, the reversing action line X2 and the common line X4 to pass through, and a dust cover 33 is provided at the outlet of the test channel 32.

[0055] Specifically, test channel 32 confines these three lines within the same channel, preventing cables from being tangled or exposed outside the enclosure. This prevents wiring errors or accidental breakage due to cable tangling, ensuring the accuracy and stability of the test line connections. Since test lines need to be frequently plugged and unplugged to adapt to different switch machines, the inner wall of test channel 32 can be made of a smooth material (such as plastic or metal tubing) to prevent the insulation layer from being damaged due to friction between the cables and the enclosure edges during cable threading or movement.

[0056] When the test system is not in operation (such as during storage or transportation), the dust cover 33 can seal the outlet of the test channel 32 to prevent external dust, sand, water droplets or small debris from entering the channel. This avoids these impurities from adhering to the cable surface or accumulating in the channel, reducing the risk of cable insulation aging or poor contact. It is especially suitable for the dusty and complex environment of railway sites.

[0057] In a preferred embodiment of this utility model, the control board 20 is provided with a heat dissipation window 34.

[0058] Specifically, the heat dissipation window 34 effectively solves the heat dissipation problem of high-power components by optimizing the air circulation of the control unit, while reducing the impact of temperature and humidity changes on the electrical system, providing environmental protection for the long-term stable operation of the switch machine current testing system, and is especially suitable for the high requirements of equipment reliability under complex working conditions on railway sites.

[0059] In a preferred embodiment of the present invention, the bottom of the box 19 is provided with pulleys.

[0060] Specifically, by setting up pulleys, operators can easily move equipment without carrying it, simply by pushing it. This adapts to scenarios on railway sites where testing needs to be conducted between different switch machines, or to the transfer needs between the laboratory and the field, thereby improving operational efficiency.

[0061] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A switch machine current testing system, characterized in that: The circuit includes a main circuit breaker connected to an external power source. The main circuit breaker, voltage regulator, and rectifier are connected in sequence to form a voltage regulating circuit. A voltmeter is connected in parallel between the positive and negative terminals of the rectifier. The voltage regulator output terminal, AC circuit breaker, and stop button are connected in sequence. The stop button is connected to the positioning button, the reverse button, the positioning contactor, and the reverse contactor, respectively. The positioning button is connected to the normally open contact of the positioning contactor, the reverse button is connected to the normally closed contact of the positioning contactor, and the normally closed contact of the positioning contactor is connected to the normally open contact of the reverse contactor, thus forming a control circuit. The rectifier positive terminal, positioning contactor, positioning circuit breaker, positioning action line and positioning side of switch machine motor are connected in sequence. The common terminal of switch machine motor is connected to common line. The common line, positioning ammeter, positioning shunt, positioning circuit breaker, positioning contactor and rectifier negative terminal are connected in sequence to form positioning action circuit. The positive terminal of the rectifier, the reverse contactor, the reverse circuit breaker, and the common line are connected in sequence. The reverse side of the switch machine motor, the reverse action line, the reverse ammeter, the reverse shunt, the reverse circuit breaker, the reverse contactor, and the negative terminal of the rectifier are connected in sequence to form a reverse action circuit.

2. The switch machine current testing system according to claim 1, characterized in that: A positioning indicator light is connected in series between the normally open contact of the positioning contactor and the normally closed contact of the reversing contactor, and a reversing indicator light is connected in series between the normally open contact of the reversing contactor and the normally closed contact of the positioning contactor.

3. The switch machine current testing system according to claim 1, characterized in that: The normally closed contact of the reverse contactor is connected to the normally open contact of the positioning contactor.

4. A switch machine current testing device, characterized in that: The system according to any one of claims 1 to 3 includes a housing, on which a control board is provided. The control board is equipped with a voltage regulator panel, a main circuit breaker, an AC circuit breaker, a positioning shunt, a reverse positioning circuit breaker, a stop button, a positioning button, a reverse positioning button, a positioning indicator light, a reverse positioning indicator light, a positioning ammeter, a reverse positioning ammeter, and a voltmeter. The voltage regulator body, positioning contactor, reverse positioning contactor, positioning shunt, and reverse positioning shunt of the voltage regulator are installed inside the housing.

5. The switch machine current testing device according to claim 4, characterized in that: The housing is equipped with a partition, with a control unit above the partition and a storage unit below it. The switch machine current testing system is located inside the control unit, and the voltage regulator body is mounted on the partition via a bracket.

6. The switch machine current testing device according to claim 5, characterized in that: Each bracket includes a connecting plate, a mounting base, a screw, a first fastening nut, and a second fastening nut. The mounting base is mounted on the partition plate and is threaded to one end of the screw. The other end of the screw passes through the first fastening nut, the connecting plate, and is threaded to the second fastening nut in sequence. The connecting plate is mounted on the regulator body.

7. The switch machine current testing device according to claim 5, characterized in that: A control panel is installed on one side of the control unit, and an opening and closing door is installed on the opposite side of the control panel. One side of the opening and closing door is hinged to the housing.

8. The switch machine current testing device according to claim 4, characterized in that: The housing has a test channel on one side for the positioning action line, the reverse action line and the common line to pass through, and the exit of the test channel is equipped with a dust cover.

9. The switch machine current testing device according to claim 4, characterized in that: The control board is equipped with heat dissipation windows.

10. The switch machine current testing device according to claim 4, characterized in that: The bottom of the box is equipped with casters.

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