Multifunctional rail transit power supply protection tester

Abstract

The utility model relates to subway maintenance technology, relay protection field. Multifunctional track traffic power supply protection tester, including power box, control box two parts, can be used independently, can be used in combination to realize more complex test and test function. The power box is composed of box, power switch, power input interface, power output interface, and the main function is to provide DC220V power supply, and the control box is composed of box, lid, touch -sensitive screen, test terminal, power switch, power interface, provides DC24V power supply, 400V drawer cut non -test and protection functional test. Two box combinations can realize 1500V spare trolley opening and closing test, DC220V power supply quantitative control, 400 drawer cut non -test, online disconnecting switch motor test function. The utility model solves the problem that does not occupy the maintenance point to 1500V spare trolley circuit breaker opening and closing test, 1500V relay protection can quantitative test, and the operation is simple, safe.

Description

Technical Field

[0001] This utility model relates to subway maintenance technology and relay protection, specifically a test instrument for rail transit power supply protection. Background Technology

[0002] Currently, testing of rail transit instruments and spare parts is inconvenient and time-consuming because the work teams and substations lack DC220V and DC24V power supplies. Testing must be conducted at the depot laboratory. The short downtime for DC equipment construction and the opening and closing tests of the 1500V DC backup trolley exacerbate the tight construction time. Furthermore, the test parameters of the 1500V DC system relay protection section cannot be quantitatively tested, resulting in non-standard testing.

[0003] Current testing equipment lacks comprehensive functionality; for example, commonly used millivolt generators lack quantitative testing capabilities for rate-of-rise protection. Traditional protection testing instruments require the shutdown of other types of protection on the testing equipment due to interference during relay protection testing, resulting in long testing times and a lack of data storage, hindering later data retrieval and use. Utility Model Content

[0004] To address the aforementioned problems, this invention proposes a multifunctional rail transit power supply protection tester that is easy to operate, can store relevant protection parameters, has complete functions, and does not require the shutdown of other protection types during testing, thus saving a significant amount of testing time.

[0005] The technical solution adopted by this utility model to achieve the above objectives is: a multifunctional rail transit power supply protection tester, including a control box, the control box including a control box body, a touch screen, test terminals, a control box power switch and a control box power interface; the control box body has a built-in PLC module and a PLC analog quantity module;

[0006] Test terminals are installed on the enclosure. Test terminals 1 and 2 output AC220V or DC220V, controlled by pin Q0.0 of the PLC module; test terminals 3 and 4 output DC24V NOT signal, controlled by pin Q0.1 of the PLC module; test terminals 5 and 6 output closing signal, controlled by pin Q0.2 of the PLC module; test terminals 7 and 8 output opening signal, controlled by pin Q0.3 of the PLC module; test terminals 9 and 10, analog current terminals, are controlled by analog PLC modules Q0+ and Q0-; test terminals 11 and 12, analog voltage terminals, are controlled by analog PLC modules Q1+ and Q1-; and test terminals 13 and 14, analog voltage terminals, are controlled by analog PLC modules Q2+ and Q2-.

[0007] Furthermore, the control box contains a power module that receives AC220V or DC220V as input and outputs DC24V with a power of 240W; the PLC analog input module TM3AQ4 outputs 0-20mA and 0-10V analog signals.

[0008] Furthermore, the control box has dimensions of 260mm in width, 260mm in height, and 230mm in volume.

[0009] Furthermore, it also includes a power supply box, which includes a power supply box body, a power supply box power input interface, a power supply box power switch, and a power supply box power output interface. The power supply box body contains a rectifier module with an input power of AC380V and an output power of DC220V, and a power of 2.2kW.

[0010] Furthermore, the power supply box has dimensions of 400mm in length, 160mm in width, and 205mm in height.

[0011] This invention, through research and testing of a 1500V backup trolley circuit breaker, deeply analyzes the setting values ​​and operating characteristics of DC protection. By applying 3D printing technology to print the equipment casing, independently editing the PLC program, and designing a touchscreen operating interface, a comprehensive testing device, the "Multifunctional Rail Transit Power Supply Protection Tester," has been developed. Its features include small size, ease of operation, storage of relevant protection parameters, and complete functionality. It can provide DC220V and DC24V power, and can also perform tests on DC motors connected to the grid as disconnect switches, 400V drawer switching tests, and 1500V DC system relay protection tests. This optimizes the testing process and saves maintenance personnel's time.

[0012] The innovative features of this utility model compared to traditional protective testing instruments are:

[0013] 1. Quantitative test of rise rate protection: It can perform quantitative testing of rise rate protection.

[0014] 2. Parameter storage function: It has the function of storing corresponding test parameters, which improves test efficiency.

[0015] 3. Optimized testing process: Compared with traditional protection testers that require shutting down other types of protection when performing relay protection tests, this utility model of multifunctional rail transit power supply protection tester can be set according to the action curve and delay time of each type of protection. There is no need to shut down other protection types during testing, saving a lot of testing time. Attached Figure Description

[0016] Figure 1 This is a perspective view of the control box of this utility model (with the box cover open).

[0017] Figure 2This is a perspective view of the control box of this utility model (with the box lid closed);

[0018] Figure 3 This is a schematic diagram of the power supply box of this utility model;

[0019] Figure 4 This is the circuit diagram of the control box of this utility model;

[0020] Figure 5 This is the circuit diagram of the power supply box of this utility model;

[0021] Figure 6 This is a schematic diagram of the power supply box of this utility model providing a battery for the control box;

[0022] Figure 7 This is a schematic diagram of the 400W non-polar test of this utility model;

[0023] Figure 8 This is a schematic diagram of the relay protection test of this utility model;

[0024] Figure 9 This is a schematic diagram of the opening and closing test of the 1500V standby trolley circuit breaker of this utility model;

[0025] Figure 10 This is a schematic diagram of the test of the motor of the Internet disconnect switch of this utility model;

[0026] Figure 11 This is a PLC program flowchart of this utility model;

[0027] In the diagram: 1. Control box cover; 2. Control box body; 3. Touch screen; 4. Test terminal; 5. Control box power switch; 6. Control box power interface; 7. Power box body; 8. Power box power input interface; 9. Power box power switch; 10. Power box power output interface. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] A multifunctional rail transit power supply protection tester, including a control box, such as Figure 1 , 2 As shown in Figure 4, the control box includes a control box body 2 and a control box cover 1. The body has a length of 260mm, a width of 260mm, and a height of 230mm. A touch screen 3 and 14 test terminals 4 are installed on the upper surface of the control box body. The outer wall of the control box body has a control box power switch 5 and a control box power interface 6. A PLC module and a PLC analog quantity module are installed inside the control box body.

[0031] The control box has four test terminals. Terminals 1 and 2 output AC220V or DC220V and are controlled by pin Q0.0 of the PLC module. Terminals 3 and 4 output a DC24V NOT signal and are controlled by pin Q0.1 of the PLC module. Terminals 5 and 6 output a closing signal and are controlled by pin Q0.2 of the PLC module. Terminals 7 and 8 output a tripping signal and are controlled by pin Q0.3 of the PLC module. Current analog terminals 9 and 10 are controlled by pins Q0+ and Q0- of the PLC analog module. Voltage analog terminals 11 and 12 are controlled by pins Q1+ and Q1- of the PLC analog module, and voltage analog terminals 13 and 14 are controlled by pins Q2+ and Q2- of the PLC analog module. Its main functions are to provide DC24V power supply, 400V drawer switching test and protection function test. The combination of two enclosures can realize advanced functions such as 1500V standby trolley opening and closing test and DC220V power supply quantitative control.

[0032] The control box contains a power supply module that accepts AC220V or DC220V as input and outputs DC24V with a power consumption of 240W. The PLC analog input module outputs 0-20mA and 0-10V analog signals.

[0033] Example 2

[0034] A multifunctional rail transit power supply protection tester includes a control box and a power supply box, the control box being as described in Example 1.

[0035] like Figure 3 and 5 As shown, the power supply box includes a power supply box body 7, with dimensions of 400mm in length, 160mm in width, and 205mm in height. The power supply box body has a power input interface 8, a power switch 9, and a power output interface 10. The power supply box body contains a rectifier module with an input power of AC380V and an output power of DC220V, and a power of 2.2kW.

[0036] When using Figure 6-11 As shown:

[0037] like Figure 6 As shown, power input interface 2 is connected to an AC380V power supply. The power supply box contains a rectifier module, which converts the input AC380V power supply to DC220V power supply with a power of 2.2kW. The DC220V power supply is then output through power output interface 4 of the power supply box. Power output interface 4 of the power supply box is connected to power interface 6 of the control box via a power cord, thus completing the process of the power supply box providing DC220V power to the control box.

[0038] like Figure 7 , 8As shown, the control box can be used independently. The power interface 6 of the control box is connected to an AC220V or DC220V power supply. The power module inside the control box converts the AC220V or DC220V input power to a DC24V output power with a power of 240W. Terminals 1 and 2 of the control box output DC24V power, which can be used for 400V drawer switching test. Terminals 11 and 12 can be used for relay protection test.

[0039] 400V cut-off test: such as Figure 7 As shown, the control box is connected to the 400V drawer. Terminals 1 and 2 in the control box test terminals provide AC220V control power to the 400V drawer, and terminals 3 and 4 send a 24V trip signal to the 400V drawer. If the 400V drawer switch trips, the trip is successful; if the 400V drawer switch does not trip, the drawer wiring and trip coil need to be checked.

[0040] Relay protection testing: such as Figure 8 As shown, the control box is connected to a DC protection relay. Start the PLC program, as follows: Figure 11 As shown, select the relay protection test function, connect the DC protection, select Imax protection test, select I protection test, select di / dt protection test, select I_DMT protection test, and select thermal overload protection test. In the control box test terminals, terminals 9 and 10 provide current analog signals for DC protection, and terminals 11 and 12 provide voltage analog signals for DC protection. Perform relay protection test on DC protection. If the protection relay trips, the test is successful. If the protection relay does not trip, the setting value needs to be checked.

[0041] like Figure 9 , 10 The control box and power supply box shown are used together. The power supply box is connected to AC380V power, and after being processed by the rectifier module, it outputs DC220V power. It is connected to the power interface of the control box through the power cable, and can perform 1500V standby trolley circuit breaker opening and closing tests and grid disconnect switch motor tests.

[0042] 1500V standby trolley circuit breaker opening and closing test: (e.g.) Figure 9 As shown, terminals 1 and 2 in the control box test terminals provide DC 220V control power to the DC trolley circuit breaker. Figure 11 In the middle, start the PLC, select the 1500V standby trolley opening and closing test function, connect the Siemens trolley circuit breaker, and test the trolley circuit breaker. Terminals 5 and 6 send closing signals to close the trolley circuit breaker, and terminals 3 and 4 send opening signals to open the trolley circuit breaker.

[0043] Internet disconnect switch motor test: such as Figure 10 As shown, the control box is connected to the isolating switch motor. Start the PLC program, as follows: Figure 11As shown, select the network disconnect switch motor test function. Terminals 1 and 2 in the control box test terminals provide DC220V power to the disconnect switch motor to test the disconnect switch motor.

[0044] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A multifunctional rail transit power supply protection tester, including a control box, characterized in that: The control box includes a control box body, a touch screen, test terminals, a control box power switch, and a control box power interface; the control box body has a built-in PLC module and a PLC analog quantity module; Test terminals are installed on the enclosure. Test terminals 1 and 2 output AC220V or DC220V, controlled by pin Q0.0 of the PLC module; test terminals 3 and 4 output DC24V NOT signal, controlled by pin Q0.1 of the PLC module; test terminals 5 and 6 output closing signal, controlled by pin Q0.2 of the PLC module; test terminals 7 and 8 output opening signal, controlled by pin Q0.3 of the PLC module; test terminals 9 and 10, analog current terminals, are controlled by analog PLC modules Q0+ and Q0-; test terminals 11 and 12, analog voltage terminals, are controlled by analog PLC modules Q1+ and Q1-; and test terminals 13 and 14, analog voltage terminals, are controlled by analog PLC modules Q2+ and Q2-.

2. The multifunctional rail transit power supply protection test instrument according to claim 1, characterized in that: The control box has an input power of AC220V or DC220V, an output of DC24V, a power of 240W, and outputs 0-20mA and 0-10V analog signals.

3. The multifunctional rail transit power supply protection test instrument according to claim 1, characterized in that: The control box has dimensions of 260mm in width and 260mm in height.

4. The multifunctional rail transit power supply protection tester according to any one of claims 1-3, characterized in that: It also includes a power supply box, which consists of a power supply box body, a power input interface, a power switch, and a power output interface. The power supply box contains a rectifier module with an input power of AC380V and an output power of DC220V, and a power of 2.2kW.

5. The multifunctional rail transit power supply protection test instrument according to claim 4, characterized in that: The power supply box has a length of 400mm, a width of 160mm, and a height of 205mm.

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