Off-line trolley switch detection platform

Abstract

The utility model discloses an off-line dolly switch detection platform comprising a box body, and a power supply control circuit, a signal indication loop, a coil detection circuit and an energy storage detection circuit are integrated in the box body. According to the off-line dolly switch detection platform provided by the utility model, an independent detection platform is formed on the dolly switch through the source control circuit, the signal indication loop, the coil detection circuit and the energy storage detection circuit, and the dolly switch is independently detected, i.e., the coil detection circuit and the energy storage detection circuit are used for detecting the voltage of the dolly switch. Whether the trolley switch tripping and closing loop is normal or not can be quickly determined, and whether other auxiliary contacts fail or not can be quickly judged through the indicating lamp, so that the workload and the working time of maintainers are reduced, and the maintenance efficiency is improved; meanwhile, if the auxiliary contact breaks down, the platform can quickly determine which auxiliary contact in the trolley switch breaks down, so that one-time maintenance personnel can quickly complete the maintenance of the trolley switch, and the maintenance efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of electrical testing of power systems, specifically to an offline trolley switch testing platform. Background Technology

[0002] Currently, the 6.3kV power distribution system of hydropower plants mainly uses the KYN28A-12 type trolley switch, which is a closed high-voltage switchgear. Due to its advantages such as high safety, high reliability, compact structure and small footprint, it is widely used in the power plant's auxiliary systems and substations. However, due to the long-term continuous operation of the equipment, its drawbacks are constantly being exposed during routine maintenance, developing from hidden equipment defects to endangering the operation of the power grid and even jeopardizing personal safety. The trolley switch has dual functions as both a switch and a disconnector. During maintenance of 6.3kV high-voltage auxiliary equipment, frequent power outages and restorations lead to several common faults in the 6.3kV trolley switch: First, frequent opening and closing of the trolley switch can cause loosening or detachment of position contacts and microswitches, and damage to the tripping and closing coils, resulting in incorrect opening and closing. Second, vibrations generated during the closing and tripping of adjacent trolley switches can cause displacement of position contacts and microswitches, leading to poor contact. Third, due to reasons such as operators not properly positioning the trolley switch, the equipment may fail to start normally during interlocked standby startup, or experience contact overheating during operation. As a crucial auxiliary equipment in power plants, the safe and stable operation of the 6.3kV trolley switch plays a vital role in the plant's production. Statistics show that in power plants, overheating of contacts caused by poor contact in the 6.3kV high-voltage switch, as well as unit disconnection and reduced generator output due to poor contact in auxiliary contacts and improper operation, occur frequently. Therefore, in addition to constantly monitoring the status of the trolley switch, operators also need to regularly inspect the operating equipment.

[0003] Then, during the maintenance of the trolley switch, since the trolley switch tripping and closing circuit and the energy storage circuit itself are primary equipment, they are the responsibility of primary maintenance personnel. However, the control circuit in the trolley switch cabinet is the responsibility of secondary maintenance personnel. As a result, when the trolley switch tripping and closing circuit and the energy storage circuit fail, the personnel responsible for maintaining the trolley switch cannot quickly determine whether the fault lies in the control circuit or the trolley switch itself. This requires the personnel to check the control circuit, tripping and closing circuit, and energy storage circuit one by one, which means they cannot notify the corresponding maintenance personnel in a timely manner. Furthermore, during the troubleshooting process, it is necessary to repeatedly and independently connect testing equipment to these circuits, which increases the maintenance steps and prolongs the maintenance time, resulting in low maintenance efficiency. Utility Model Content

[0004] To address the problem in existing technologies where, after a trolley switch malfunction, it is difficult to quickly determine whether the fault lies with the trolley switch itself, requiring maintenance personnel to inspect the trolley switch and its cabinet one by one, resulting in low maintenance efficiency, this invention provides an offline trolley switch detection device. This device bypasses the secondary circuit of the trolley switch and directly supplies power to verify whether the trolley switch body's tripping and closing circuit and energy storage circuit are functioning properly. This allows for rapid confirmation of whether the fault lies in the trolley switch control circuit or the trolley switch body itself, and notifies the relevant maintenance personnel.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model discloses an offline trolley switch detection platform, including a housing, which integrates a power control circuit, a signal indication circuit, a coil detection circuit and an energy storage detection circuit.

[0007] The power control circuit includes a first AC circuit breaker JK, one end of which is connected to a power interface, and the other end of which is connected to one end of a power conversion module DYM. The other end of the power conversion module DYM is connected to the coil detection circuit and the energy storage detection circuit, respectively.

[0008] The signal indication circuit is connected in the circuit between the first AC circuit breaker JK and the power conversion module DYM;

[0009] The signal indication circuit includes a second AC circuit breaker JK1. One end of the second AC circuit breaker JK1 is connected to the circuit between the first AC circuit breaker JK and the power conversion module DYM. The other end of the second AC circuit breaker JK1 is connected to the trolley switch socket CZ switch contact indication circuit.

[0010] The trolley switch socket CZ switch contact indicator circuit includes an indicator light connected in series and the trolley switch socket CZ switch contact circuit;

[0011] The coil detection circuit includes a first DC circuit breaker ZK, one end of which is connected to the power conversion module DYM, and the other end of which is connected in parallel to a trip coil control circuit and a closing coil control circuit.

[0012] The trip coil control circuit includes the trip coil circuit of the trip button TA and the trolley switch socket CZ connected in series.

[0013] The closing coil detection circuit includes the closing coil circuit of the closing button HA and the trolley switch socket CZ connected in series.

[0014] The energy storage detection circuit includes a second DC circuit breaker ZK1, one end of which is connected to the power conversion module DYM, and the other end of which is connected to an energy storage control circuit.

[0015] The energy storage control circuit includes an energy storage circuit consisting of an energy storage button 2SA connected in series with a trolley switch socket CZ.

[0016] Preferably, the switch contact circuit of the trolley switch socket CZ includes multiple sets of normally closed contact circuits and multiple sets of normally open contact circuits;

[0017] The multiple sets of normally closed contact circuits include: a first normally closed contact circuit formed by connecting the 8th connector, the first normally closed contact, and the 18th contact in series; a second normally closed contact circuit formed by connecting the 28th connector, the second normally closed contact, and the 38th connector in series; a third normally closed contact circuit formed by connecting the 46th connector, the third normally closed contact, and the 12th connector in series; a fourth normally closed contact circuit formed by connecting the 42nd connector, the fourth normally closed contact, and the 32nd connector in series; a fifth normally closed contact circuit formed by connecting the 29th connector, the fifth normally closed contact, and the 39th connector in series; a sixth normally closed contact circuit formed by connecting the 43rd connector, the sixth normally closed contact, and the 44th connector in series; a seventh normally closed contact circuit formed by connecting the 23rd connector, the seventh normally closed contact, and the 33rd connector in series; and an eighth normally closed contact circuit formed by connecting the 11th connector, the eighth normally closed contact, and the 21st connector in series. Closed contact circuit; First normally open contact circuit formed by connecting the 11th connector, the first normally open contact, and the 22nd connector in series; Second normally open contact circuit formed by connecting the 5th connector, the second normally open contact, and the 15th connector in series; Third normally open contact circuit formed by connecting the 7th connector, the third normally open contact, and the 17th connector in series; Fourth normally open contact circuit formed by connecting the 9th connector, the fourth normally open contact, and the 19th connector in series; Fifth normally open contact circuit formed by connecting the 2nd connector, the fifth normally open contact, and the 37th connector in series; Sixth normally open contact circuit formed by connecting the 27th connector, the sixth normally open contact, and the 48th connector in series; Seventh normally open contact circuit formed by connecting the 3rd connector, the seventh normally open contact, and the 13th connector in series; Eighth normally open contact circuit formed by connecting the 24th connector, the normally open contact S2 of the energy storage limit switch, and the 34th connector in series.

[0018] Preferably, the indicator lights include a red signal indicator light, a green signal indicator light, and a yellow signal indicator light connected in series with the eighth normally open contact circuit;

[0019] The green indicator lights include a first green indicator light 1LD connected in series with the first normally closed contact circuit, a second green indicator light 2LD connected in series with the second normally closed contact circuit, a third green indicator light 3LD connected in series with the third normally closed contact circuit, a fourth green indicator light 4LD connected in series with the fourth normally closed contact circuit, a fifth green indicator light 5LD connected in series with the fifth normally closed contact circuit, a sixth green indicator light 6LD connected in series with the sixth normally closed contact circuit, a seventh green indicator light 7LD connected in series with the seventh normally closed contact circuit, and an eighth green indicator light 8LD connected in series with the eighth normally closed contact circuit.

[0020] The red indicator lights include a first red indicator light 1HD connected in series with the first normally open contact circuit, a second red indicator light 2HD connected in series with the second normally open contact circuit, a third red indicator light 3HD connected in series with the third normally open contact circuit, a fourth red indicator light 4HD connected in series with the fourth normally open contact circuit, a fifth red indicator light 5HD connected in series with the fifth normally open contact circuit, a sixth red indicator light 6HD connected in series with the sixth normally open contact circuit, and a seventh red indicator light 7HD connected in series with the seventh normally open contact circuit.

[0021] Preferably, the red signal indicator, the green signal indicator, and the yellow signal indicator are all of model AD16-22D.

[0022] Preferably, the trip coil circuit of the trolley switch socket CZ includes a 30th connector, a ninth normally open contact, a closing coil, and a 31st connector connected in series, and the 30th connector is connected in series with the trip button TA.

[0023] Preferably, the trip coil circuit of the trolley switch socket CZ includes a 14th connector, a ninth normally closed contact, a closing coil, and a 4th connector connected in series, and the 14th connector is connected in series with the closing button HA.

[0024] Preferably, the energy storage circuit of the trolley switch socket CZ includes a 25th connector connected in series, a normally closed contact S1 of the energy storage limit switch, an energy storage motor, and a 35th connector, wherein the 25th connector is connected in series with the energy storage button 2SA.

[0025] Preferably, the first AC circuit breaker JK has a specification of 2P and a rated current of 5A; the second AC circuit breaker JK1 has a specification of 2P and a rated current of 2A.

[0026] Preferably, the first DC circuit breaker ZK and the second DC circuit breaker ZK1 are 2P and rated current 3A.

[0027] Preferably, the power conversion module DYM is an S-600-220 type power converter used to convert 220V AC power to 220V DC power.

[0028] Compared with the prior art, the present invention has the following beneficial technical effects:

[0029] This utility model proposes an offline trolley switch testing platform. By integrating a source control circuit, signal indication circuit, coil detection circuit, and energy storage detection circuit, an independent testing platform is formed on the trolley switch. This platform allows for independent testing of the trolley switch. Specifically, the coil detection circuit and energy storage detection circuit quickly determine the normality of the trolley switch's tripping and closing circuits. Simultaneously, indicator lights rapidly determine whether other auxiliary contacts are faulty, reducing the workload and time for maintenance personnel and improving maintenance efficiency. Furthermore, if an auxiliary contact malfunctions, the platform can quickly identify which auxiliary contact within the trolley switch is faulty, enabling primary maintenance personnel to quickly complete the trolley switch repair, further improving efficiency. During operation, the platform bypasses the control circuit to independently test the trolley switch body, quickly determining the fault type and promptly notifying the appropriate primary or secondary maintenance personnel. This significantly improves maintenance efficiency.

[0030] Furthermore, this platform connects multiple normally closed contact circuits and multiple normally open contacts to signal indicator lights. During the closing and opening processes, by observing the indication of the corresponding indicator lights, it is possible to quickly determine which contact in the trolley switch is faulty, which facilitates maintenance personnel in carrying out repairs. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the offline trolley switch detection platform proposed in this utility model;

[0032] Figure 2 This is a circuit connection diagram of the offline trolley switch detection platform proposed in this utility model. Detailed Implementation

[0033] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 are not intended to 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.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0039] See Figure 1 and Figure 2This utility model discloses an offline trolley switch detection platform, including a housing, which integrates a power control circuit, a signal indication circuit, a coil detection circuit and an energy storage detection circuit.

[0040] The power control circuit includes a first AC circuit breaker JK, which is a 2-pin circuit breaker with a rated current of 5A. One end of the first AC circuit breaker JK is connected to a power interface, and the other end is connected to one end of a power conversion module DYM. The power conversion module DYM is an S-600-220 type power converter used to convert 220V AC power to 220V DC power. The other end of the power conversion module DYM is connected to the coil detection circuit and the energy storage detection circuit, respectively. The S-600-220 type power converter converts 220V AC power to 220V DC power to supply the coil detection circuit and the energy storage detection circuit, providing working power for the coil detection circuit and the energy storage detection circuit.

[0041] A signal indication circuit is connected in the circuit between the first AC circuit breaker JK and the power conversion module DYM;

[0042] The signal indication circuit includes a second AC circuit breaker JK1. One end of the second AC circuit breaker JK1 is connected to the circuit between the first AC circuit breaker JK and the power conversion module DYM. The other end of the second AC circuit breaker JK1 is connected to the trolley switch socket CZ switch contact indication circuit.

[0043] The CZ switch contact indicator circuit for the trolley switch socket includes a series-connected indicator light and the CZ switch contact circuit; the CZ switch contact circuit includes multiple sets of normally closed contact circuits and multiple sets of normally open contact circuits; among them, the multiple sets of normally closed contact circuits include the first normally closed contact circuit formed by connecting the 8th connector, the first normally closed contact, and the 18th connector in series; the second normally closed contact circuit formed by connecting the 28th connector, the second normally closed contact, and the 38th connector in series; the 4th... The circuit consists of: a third normally closed contact formed by connecting the 6th connector, the third normally closed contact, and the 12th connector in series; a fourth normally closed contact formed by connecting the 42nd connector, the fourth normally closed contact, and the 32nd connector in series; a fifth normally closed contact formed by connecting the 29th connector, the fifth normally closed contact, and the 39th connector in series; a sixth normally closed contact formed by connecting the 43rd connector, the sixth normally closed contact, and the 44th connector in series; and a circuit consisting of the 23rd connector, the seventh normally closed contact, and the 33rd connector in series. The seventh normally closed contact circuit; the eighth normally closed contact circuit formed by connecting the 11th connector, the eighth normally closed contact, and the 21st connector in series; the first normally open contact circuit formed by connecting the 11th connector, the first normally open contact, and the 22nd connector in series; the second normally open contact circuit formed by connecting the 5th connector, the second normally open contact, and the 15th connector in series; the third normally open contact circuit formed by connecting the 7th connector, the third normally open contact, and the 17th connector in series; the 9th connector, the fourth normally open contact, and the... The fourth normally open contact circuit is formed by connecting the 19th connector in series; the fifth normally open contact circuit is formed by connecting the 2nd connector, the 5th normally open contact, and the 37th connector in series; the sixth normally open contact circuit is formed by connecting the 27th connector, the 6th normally open contact, and the 48th connector in series; the seventh normally open contact circuit is formed by connecting the 3rd connector, the 7th normally open contact, and the 13th connector in series; and the eighth normally open contact circuit is formed by connecting the 24th connector, the normally open contact S2 of the limit switch, and the 34th connector in series.

[0044] The indicator lights include a red signal indicator light, a green signal indicator light, and a yellow signal indicator light 1YD connected in series with the normally open contact S2 of the limit switch;

[0045] The green indicator lights include a first green indicator light 1LD connected in series with the first normally closed contact circuit, a second green indicator light 2LD connected in series with the second normally closed contact circuit, a third green indicator light 3LD connected in series with the third normally closed contact circuit, a fourth green indicator light 4LD connected in series with the fourth normally closed contact circuit, a fifth green indicator light 5LD connected in series with the fifth normally closed contact circuit, a sixth green indicator light 6LD connected in series with the sixth normally closed contact circuit, a seventh green indicator light 7LD connected in series with the seventh normally closed contact circuit, and an eighth green indicator light 8LD connected in series with the eighth normally closed contact circuit.

[0046] The red indicator lights include a first red indicator light 1HD connected in series with the first normally open contact circuit, a second red indicator light 2HD connected in series with the second normally open contact circuit, a third red indicator light 3HD connected in series with the third normally open contact circuit, a fourth red indicator light 4HD connected in series with the fourth normally open contact circuit, a fifth red indicator light 5HD connected in series with the fifth normally open contact circuit, a sixth red indicator light 6HD connected in series with the sixth normally open contact circuit, and a seventh red indicator light 7HD connected in series with the seventh normally open contact circuit. The red, green, and yellow indicator lights 1YD are all of model AD16-22D.

[0047] The coil detection circuit includes a first DC circuit breaker ZK, one end of which is connected to a power conversion module DYM, and the other end of which is connected in parallel to a trip coil control circuit and a closing coil control circuit. The first AC circuit breaker JK is 2P with a rated current of 5A; the second AC circuit breaker JK1 is 2P with a rated current of 2A; and the first DC circuit breaker ZK and the second DC circuit breaker ZK1 are both 2P with a rated current of 3A.

[0048] The trip coil control circuit includes the trip button TA connected in series with the trip coil circuit of the trolley switch socket CZ; the trip coil circuit of the trolley switch socket CZ includes the 30th connector, the ninth normally open contact, the closing coil, and the 31st connector connected in series, and the 30th connector is connected in series with the trip button TA.

[0049] The closing coil detection circuit includes the closing coil circuit of the closing button HA and the trolley switch socket CZ connected in series; the tripping coil circuit of the trolley switch socket CZ includes the 14th connector, the ninth normally closed contact, the closing coil, and the 4th connector connected in series, and the 14th connector is connected in series with the closing button HA.

[0050] The energy storage detection circuit includes a second DC circuit breaker ZK1. One end of the second DC circuit breaker ZK1 is connected to the power conversion module DYM, and the other end of the second DC circuit breaker ZK1 is connected to the energy storage control circuit.

[0051] The energy storage control circuit includes the energy storage button 2SA connected in series with the energy storage circuit of the trolley switch socket CZ. The energy storage circuit of the trolley switch socket CZ includes the 25th connector connected in series, the normally closed contact S1 of the energy storage limit switch, the energy storage motor and the 35th connector, and the 25th connector connected in series with the energy storage button 2SA.

[0052] This platform connects to the AC 220V maintenance power supply at the maintenance site via a power interface, providing operating power for both the platform and the signal indication circuit. An S-600-220 power converter is used to convert the AC 220V voltage to DC 220V, providing operating power for the coil detection circuit and energy storage detection circuit. Simultaneously, the DYM power conversion module features overcurrent, overheat, and short-circuit protection functions to prevent damage to electrical equipment or the switching power supply. The power interface is a standard single-phase 3-pin 5A power plug. When using this device to test the trolley switch, connect the power plug of the offline trolley switch testing platform to the AC 220V maintenance power socket at the maintenance site. Plug the connector of the trolley switch to be tested into the trolley switch socket CZ. Close the first AC circuit breaker JK. The power conversion module outputs 220V DC power. The second AC circuit breaker JK1 controls the indicator light separately. The first DC circuit breaker ZK controls the trip coil control circuit and the closing coil control circuit. The second DC circuit breaker ZK1 controls the energy storage control circuit. Eight green indicator lights monitor the status of eight pairs of normally closed contacts, seven red indicator lights monitor the status of seven pairs of normally open contacts, and one yellow indicator light monitors the energy storage status.Close the first DC circuit breaker ZK and press the closing button HA. The trolley switch will perform the closing action. At this time, the normally closed contact will open and the normally open contact will close. The following red indicator lights connected in series with the first normally open contact circuit will all light up: the first red indicator light 1HD, the second red indicator light 2HD, the third red indicator light 3HD, the fourth red indicator light 4HD, the fifth red indicator light 5HD, the sixth red indicator light 6HD, and the seventh red indicator light 7HD. When the following green indicator lights are all extinguished: the first green indicator light 1LD connected in series with the first normally closed contact circuit, the second green indicator light 2LD connected in series with the second normally closed contact circuit, the third green indicator light 3LD connected in series with the third normally closed contact circuit, the fourth green indicator light 4LD connected in series with the fourth normally closed contact circuit, the fifth green indicator light 5LD connected in series with the fifth normally closed contact circuit, the sixth green indicator light 6LD connected in series with the sixth normally closed contact circuit, the seventh green indicator light 7LD connected in series with the seventh normally closed contact circuit, and the eighth green indicator light 8LD connected in series with the eighth normally closed contact circuit, the trip button TA is pressed, and the trolley switch trips. At this time, the normally closed contacts close. When the normally open contact opens, the following green indicator lights—1LD (connected in series with the first normally closed contact circuit), 2LD (connected in series with the second normally closed contact circuit), 3LD (connected in series with the third normally closed contact circuit), 4LD (connected in series with the fourth normally closed contact circuit), 5LD (connected in series with the fifth normally closed contact circuit), 6LD (connected in series with the sixth normally closed contact circuit), 7LD (connected in series with the seventh normally closed contact circuit), and 8LD (connected in series with the eighth normally closed contact circuit)—all illuminate. The first red indicator light 1LD (connected in series with the first normally open contact circuit) also illuminates. If all the following indicators are off: HD, 2HD (connected in series with the second normally open contact circuit), 3HD (connected in series with the third normally open contact circuit), 4HD (connected in series with the fourth normally open contact circuit), 5HD (connected in series with the fifth normally open contact circuit), 6HD (connected in series with the sixth normally open contact circuit), and 7HD (connected in series with the seventh normally open contact circuit), it indicates that the tripping and closing circuit and auxiliary contact switching of the trolley switch are normal. If any one of the indicators is abnormal, it indicates that the tripping and closing circuit and auxiliary contact switching of the trolley switch are not normal, and thus the trolley switch is malfunctioning. When the first DC circuit breaker ZK is closed, if the line has not stored energy, the yellow signal indicator 1YD will not light up. When the energy storage detection circuit button 2SA is switched to the energy storage position, after energy storage is completed, the yellow signal indicator 1YD will light up, indicating that the energy storage circuit is normal. If it does not light up, it indicates that the energy storage circuit of the trolley switch is malfunctioning and needs to be repaired.In addition to detecting the trip and close circuits, the system can also determine the normality of the fifteen pairs of auxiliary contacts by observing the changes in the corresponding indicator lights, allowing maintenance personnel to troubleshoot faults. This utility model of an offline trolley switch testing platform eliminates the need for repeated wiring changes and wiring on terminal blocks. Simply connect a 220V AC power supply and plug in the trolley switch socket to test the trip and close functions and multiple pairs of auxiliary contacts. It can quickly test the operating condition of a trolley switch, thereby reducing the workload of maintenance personnel. Furthermore, it completely bypasses the secondary control circuit of the trolley switch, independently testing the trolley switch and avoiding the influence of secondary circuit faults on fault type identification.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0054] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. An offline trolley switch testing platform, characterized in that, The enclosure includes a power control circuit, a signal indication circuit, a coil detection circuit, and an energy storage detection circuit. The power control circuit includes a first AC circuit breaker JK, one end of which is connected to a power interface, and the other end of which is connected to one end of a power conversion module DYM. The other end of the power conversion module DYM is connected to the coil detection circuit and the energy storage detection circuit, respectively. The signal indication circuit is connected in the circuit between the first AC circuit breaker JK and the power conversion module DYM; The signal indication circuit includes a second AC circuit breaker JK1. One end of the second AC circuit breaker JK1 is connected to the circuit between the first AC circuit breaker JK and the power conversion module DYM. The other end of the second AC circuit breaker JK1 is connected to the trolley switch socket CZ switch contact indication circuit. The trolley switch socket CZ switch contact indicator circuit includes an indicator light connected in series and the trolley switch socket CZ switch contact circuit; The coil detection circuit includes a first DC circuit breaker ZK, one end of which is connected to the power conversion module DYM, and the other end of which is connected in parallel to a trip coil control circuit and a closing coil control circuit. The trip coil control circuit includes the trip coil circuit of the trip button TA and the trolley switch socket CZ connected in series. The closing coil detection circuit includes the closing coil circuit of the closing button HA and the trolley switch socket CZ connected in series. The energy storage detection circuit includes a second DC circuit breaker ZK1, one end of which is connected to the power conversion module DYM, and the other end of which is connected to an energy storage control circuit. The energy storage control circuit includes an energy storage circuit consisting of an energy storage button 2SA connected in series with a trolley switch socket CZ.

2. The offline trolley switch detection platform according to claim 1, characterized in that, The switch contact circuit of the trolley switch socket CZ includes multiple sets of normally closed contact circuits and multiple sets of normally open contact circuits; The multiple sets of normally closed contact circuits include: a first normally closed contact circuit formed by connecting the 8th connector, the first normally closed contact, and the 18th connector in series; a second normally closed contact circuit formed by connecting the 28th connector, the second normally closed contact, and the 38th connector in series; a third normally closed contact circuit formed by connecting the 46th connector, the third normally closed contact, and the 12th connector in series; a fourth normally closed contact circuit formed by connecting the 42nd connector, the fourth normally closed contact, and the 32nd connector in series; a fifth normally closed contact circuit formed by connecting the 29th connector, the fifth normally closed contact, and the 39th connector in series; a sixth normally closed contact circuit formed by connecting the 43rd connector, the sixth normally closed contact, and the 44th connector in series; a seventh normally closed contact circuit formed by connecting the 23rd connector, the seventh normally closed contact, and the 33rd connector in series; and an eighth normally closed contact circuit formed by connecting the 11th connector, the eighth normally closed contact, and the 21st connector in series. Closed contact circuit; First normally open contact circuit formed by connecting the 11th connector, the first normally open contact, and the 22nd connector in series; Second normally open contact circuit formed by connecting the 5th connector, the second normally open contact, and the 15th connector in series; Third normally open contact circuit formed by connecting the 7th connector, the third normally open contact, and the 17th connector in series; Fourth normally open contact circuit formed by connecting the 9th connector, the fourth normally open contact, and the 19th connector in series; Fifth normally open contact circuit formed by connecting the 2nd connector, the fifth normally open contact, and the 37th connector in series; Sixth normally open contact circuit formed by connecting the 27th connector, the sixth normally open contact, and the 48th connector in series; Seventh normally open contact circuit formed by connecting the 3rd connector, the seventh normally open contact, and the 13th connector in series; Eighth normally open contact circuit formed by connecting the 24th connector, the normally open contact S2 of the energy storage limit switch, and the 34th connector in series.

3. The offline trolley switch detection platform according to claim 2, characterized in that, The indicator lights include a red signal indicator light, a green signal indicator light, and a yellow signal indicator light connected in series with the eighth normally open contact circuit; The green indicator lights include a first green indicator light 1LD connected in series with the first normally closed contact circuit, a second green indicator light 2LD connected in series with the second normally closed contact circuit, a third green indicator light 3LD connected in series with the third normally closed contact circuit, a fourth green indicator light 4LD connected in series with the fourth normally closed contact circuit, a fifth green indicator light 5LD connected in series with the fifth normally closed contact circuit, a sixth green indicator light 6LD connected in series with the sixth normally closed contact circuit, a seventh green indicator light 7LD connected in series with the seventh normally closed contact circuit, and an eighth green indicator light 8LD connected in series with the eighth normally closed contact circuit. The red indicator lights include a first red indicator light 1HD connected in series with the first normally open contact circuit, a second red indicator light 2HD connected in series with the second normally open contact circuit, a third red indicator light 3HD connected in series with the third normally open contact circuit, a fourth red indicator light 4HD connected in series with the fourth normally open contact circuit, a fifth red indicator light 5HD connected in series with the fifth normally open contact circuit, a sixth red indicator light 6HD connected in series with the sixth normally open contact circuit, and a seventh red indicator light 7HD connected in series with the seventh normally open contact circuit.

4. The offline trolley switch detection platform according to claim 3, characterized in that, The red, green, and yellow indicator lights are all model AD16-22D.

5. The offline trolley switch detection platform according to claim 1, characterized in that, The trip coil circuit of the trolley switch socket CZ includes a 30th connector, a ninth normally open contact, a closing coil, and a 31st connector connected in series. The 30th connector is connected in series with the trip button TA.

6. The offline trolley switch detection platform according to claim 1, characterized in that, The trip coil circuit of the trolley switch socket CZ includes a 14th connector connected in series, a ninth normally closed contact, a closing coil, and a 4th connector. The 14th connector is connected in series with the closing button HA.

7. The offline trolley switch detection platform according to claim 1, characterized in that, The energy storage circuit of the trolley switch socket CZ includes a 25th connector connected in series, a normally closed contact S1 of the energy storage limit switch, an energy storage motor, and a 35th connector. The 25th connector is connected in series with the energy storage button 2SA.

8. The offline trolley switch detection platform according to claim 3, characterized in that, The first AC circuit breaker JK has a specification of 2P and a rated current of 5A; the second AC circuit breaker JK1 has a specification of 2P and a rated current of 2A.

9. The offline trolley switch detection platform according to claim 1, characterized in that, The first DC circuit breaker ZK and the second DC circuit breaker ZK1 are both 2P circuit breakers with a rated current of 3A.

10. The offline trolley switch detection platform according to claim 1, characterized in that, The power conversion module DYM is an S-600-220 type power converter used to convert 220V AC power to 220V DC power.

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