Testing device for judging correct action and wiring of contactor combination unit

Abstract

The utility model discloses a testing device for judging the action and wiring correctness of a contactor combination unit, which relates to the technical field of contactor testing and comprises a PLC (Programmable Logic Controller), a display unit, an intermediate relay unit and a power supply module, the power supply module is used for supplying power to the contactor combination unit and the PLC. The display unit is connected with the PLC and is used for inputting test options, sending test commands to the PLC and displaying feedback signals of the contactor combination unit; the PLC is connected with the contactor combination unit and the display unit through the intermediate relay unit, and is used for controlling the on / off of each relay in the intermediate relay unit according to a test command, thereby controlling the on / off of each contactor contact in the contactor combination unit. And meanwhile, an electric shock disconnection / connection feedback signal of each contactor in the contactor combination unit is sent to the display unit for displaying a test result. The safety socket is simple to operate and convenient to use, and avoids the risk of direct electric shock.

Description

Technical Field

[0001] The utility model relates to the technical field of contactor testing, in particular to a testing device for judging the action and correct wiring of a contactor combination unit. Background Art

[0002] For the conventional action test of a contactor combination unit and the correct wiring test after replacing components, different tests are required. Among them, for the action test, an external power supply needs to be used, and multiple re-wirings are required according to functional needs, which is not only cumbersome but also has potential safety hazards of electric shock and operation errors. For the correct external wiring test, a multimeter needs to be manually used to measure multiple measurement points under the live state, and re-wiring is also required. Therefore, the prior art cannot quickly test the contactor combination unit and has potential electric shock safety hazards.

[0003] For example, for the external fan full-speed contactor, half-speed contactor, braking resistor fan contactor and their auxiliary contacts in the traction and auxiliary systems of electric multiple units of Bombardier, new parts need to be replaced. For the newly replaced contactors and their auxiliary contacts, it is necessary to test whether there are wrong connections and loose connections in the wiring. The traditional test method requires making an AC-DC conversion power supply first, converting the AC220V voltage into DC110V to supply power to the contactor, and then manually measuring the voltage between each contact of the contactor with a multimeter to judge whether there is a loose connection, and it is impossible to judge whether the wire sequence is correct. The whole test process takes a quite long time and there is a potential electric shock hazard. Summary of the Utility Model

[0004] In order to overcome the defects in the above prior art, the utility model provides a testing device for judging the action and correct wiring of a contactor combination unit, which is simple to operate, convenient to use, and avoids the risk of direct electric shock.

[0005] To achieve the above object, the utility model adopts the following technical solutions, including:

[0006] A testing device for judging the action and correct wiring of a contactor combination unit, including: a PLC, a display unit, an intermediate relay unit, and a power supply module;

[0007] The power supply module is used to supply power to the contactor combination unit and the PLC respectively;

[0008] The display unit is connected to the PLC, and is used to input test options and send test commands to the PLC, and is also used to display the feedback signal of the contactor combination unit;

[0009] The PLC is connected to the contactor combination unit and the display unit through the intermediate relay unit respectively, and is used to control the opening / closing of each relay in the intermediate relay unit according to the test command, so as to control the opening / closing of each contactor contact in the contactor combination unit. At the same time, the opening / closing feedback signal of each contactor contact in the contactor combination unit is sent to the display unit for displaying the test result.

[0010] Preferably, the power supply module converts the AC220V voltage into a DC110V C to supply power to the contactor combination unit, and converts the other path into DC24V to supply power to the PLC. One path supplies an input signal to the PLC through the contactor feedback contact of the object under test.

[0011] Preferably, the intermediate relay unit is connected to the contactor combination unit through a connector, and the connector is used to prevent misinsertion.

[0012] The advantages of the present utility model are as follows:

[0013] (1) It can measure the on / off states of multiple contactors and their auxiliary contacts, such as the full-speed contactor, half-speed contactor of the external fan, and the contactor of the braking resistor fan.

[0014] (2) The operation is simple and convenient to use, avoiding the risk of direct electric shock.

[0015] (3) The AC220V voltage is converted into a DC110V C to supply power to the contactor through a switching power supply, and the other path is converted into DC24V to supply power to the PLC control. Description of the Drawings

[0016] Figure 1 It is a structural diagram of a test device for judging the action and correct wiring of the contactor combination unit.

[0017] Figure 2 It is a wiring diagram of the test device.

[0018] Figure 3 It is a schematic diagram of the object under test (full-speed contactor and half-speed contactor of the external fan).

[0019] Figure 4 It is a schematic diagram of the object under test (contactor of the braking resistor fan). Detailed Embodiment

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] As shown by Figure 1

[0021] , a test device for judging the action and correct wiring of a contactor combination unit includes: a PLC, a display unit, an intermediate relay unit, and a power module;

[0022] The power module converts the AC220V voltage into a DC110V C to supply power to the contactor combination unit, and converts the other path into DC24V to supply power to the PLC.

[0023] The display unit is connected to the PLC, and is used for inputting test options and sending test commands to the PLC, and for displaying the feedback signal of the contactor combination unit.

[0024] The PLC is connected to the contactor combination unit through the intermediate relay unit, and is used for controlling the opening / closing of each relay in the intermediate relay unit according to the test command, so as to control the opening / closing of each contactor contact in the contactor combination unit. At the same time, the PLC sends the opening / closing feedback signal of each contactor contact in the contactor combination unit to the display unit for displaying the test result.

[0025] The intermediate relay unit is connected to the contactor combination unit through a connector, and the connector is used to prevent misplugging.

[0026] In this embodiment, two connectors, X25 and X26, are simultaneously connected to the contactor under test, a PLC test program is independently written, and then operated through the display unit, that is, the touch screen, and finally the relevant test results are displayed.

[0027] In this embodiment, for the full-speed contactor of the external fan, the half-speed contactor, the braking resistor fan contactor and their auxiliary contacts, new parts need to be replaced. For the replaced new contactors and their auxiliary contacts, it is necessary to test whether there are wrong connections or loose connections in the wiring.

[0028] As shown by Figure 2 is the wiring diagram of the test device. KA1-KA8 are the intermediate relay units, and IO.1-I0.7 are the signal input ends where 24V is fed back to the PLC through the contacts of the object under test. Figure 3 is the schematic diagram of the object under test (the full-speed contactor and half-speed contactor of the external fan). Figure 4 is the schematic diagram of the object under test (the braking resistor fan contactor). Figure 2 and Figure 3 、 4 are correspondingly connected. For example, X26:5 is connected to Figure 3 at X26:5 through an anti-misplugging joint.

[0029] When selecting the ACM / MCM half-speed test through the display unit:

[0030] The KA3 of the PLC is energized, and the KA3 contactor closes. The X26:8 / X26:6 outputs a DC110 power supply, enabling the contactor of the object under test 1.4.8 (i.e., the half-speed contactor), and the half-speed contactor is energized and closes. At this time, the DC24 of X26:3 passes through the 1.4.1 circuit breaker and the full-speed closed contact, and supplies power to the PLC input terminal I0.4 through X26:14. At this time, the corresponding half-speed command indicator light on the display unit is on.

[0031] When the phase sequence test is selected through the display unit:

[0032] The PLC sequentially energizes KA6, KA7, and KA8 to supply power to the U, V, and W lines. X25:4, X25:5, and X25:6 supply power to the PLC input terminals I0.5, I0.6, and I0.7. At this time, the internal program of the PLC judges whether the UVW wiring is correct according to the energization sequence. The display unit displays whether the line sequence is correct or incorrect according to the output result of the PLC. If the PLC input terminals I0.5, I0.6, and I0.7 are energized in sequence, the wiring is correct and there is no loose connection; if the energization sequence of the PLC input terminals I0.5, I0.6, and I0.7 is incorrect (for example, first I0.6 and then I0.5 and I0.7 are energized) or not energized, it is judged that the wiring is incorrect.

[0033] The full-speed test and the braking resistor test steps and principles are the same.

[0034] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A test device for judging whether a contactor combination unit is operating and wiring is correct, characterized in that: include: PLC, display unit, intermediate relay unit, power module; The power supply module is used to supply power to the contactor combination unit and the PLC respectively; The display unit is connected to the PLC, and is used to input test options and send test commands to the PLC, and is used to display feedback signals of the contactor combination unit; The PLC is connected to the contactor combination unit and the display unit respectively through the intermediate relay unit, and is used to control the opening / closing of each relay in the intermediate relay unit according to the test command, thereby controlling the opening / closing of each contactor contact in the contactor combination unit, and at the same time sending the opening / closing feedback signal of each contactor contact in the contactor combination unit to the display unit for displaying the test result.

2. A testing device for judging whether a contactor assembly unit is operating and wiring is correct according to claim 1, characterized in that: The power module converts the AC220V voltage into one DC110VC to power the contactor combination unit, converts another into DC24V to power the PLC, and inputs a signal to the PLC through the contactor feedback contact of the object under test.

3. A testing device for judging whether a contactor assembly unit is operating and wiring is correct according to claim 1, characterized in that: The intermediate relay unit is connected to the contactor combination unit via a connector, and the connector is used to prevent wrong insertion.

Images