A motor control center drawer switch test adapter and test method

Abstract

The present invention provides a motor control center drawer switch test adapter and test method. The adapter comprises a plug-in I connected to a secondary plug-in of a motor control center cabinet body, a plug-in II connected to a drawer switch secondary plug-in, and a wire connecting the plug-in I and the plug-in II. The test method comprises: pulling the drawer switch out of the motor control center cabinet body, connecting the plug-in I to the secondary plug-in of the motor control center cabinet body, connecting the plug-in II to the drawer switch secondary plug-in to form an external secondary circuit, confirming the correctness of the transmission of the switch quantity position signal of the auxiliary contact of components such as analog conversion switches and contactors on the ECS and DCS backend, inputting voltage and current to the protection device to simulate the protection action with a protection tester, confirming the correctness of the protection action signal on the backend, inputting the measurement current to the protection device with the protection tester, and confirming the accuracy of the current display on the backend.

Description

Technical Field

[0001] The invention belongs to the technical field of drawer switch maintenance and testing, and in particular relates to a drawer switch test adapter device and a test method for a motor control center. Background Art

[0002] The drawer switch of the motor control center is generally used to control motors with motor power below 75 kilowatts. The drawer switch contains the main circuit air switch, contactor, comprehensive protection and related control components. The external interface has the main power circuit input, output plug and secondary line plug. The main power circuit provides power to the motor through the power input plug, the main circuit air switch and contactor in the drawer switch to the power output plug. The motor protection device and contactor control some components, and the start and stop operations can be performed on the drawer switch panel. The secondary line plug is used for the control and measurement signals in the drawer and the connection of external control, accepting the start and stop commands of the DCS, and feedback of analog quantities such as the position and current of the air switch, contactor and transfer switch.

[0003] The drawer switch cannot be inspected inside the cabinet after it is put into the cabinet. During inspection, the drawer switch must be pulled out of the cabinet, the circuit plug and the secondary line plug must be disconnected, and the protection device and the secondary circuit must be checked with a temporary power supply and protection device. The externally connected secondary circuit can only be checked separately from the cabinet terminal block, and the condition of the entire secondary circuit cannot be checked. The plug-in contact condition cannot be confirmed to be good, and the relevant external circuit cannot be tested for transmission. The test items are incomplete, and the analog quantity and some switch quantities can only be checked after the equipment is running, which affects the judgment and improvement of the health level of the motor control circuit. Summary of the invention

[0004] The present invention provides a motor control center drawer switch test adapter and test method, which avoids the drawbacks of incomplete test items and analog quantities and partial switch quantities that can only be checked after the equipment is running due to limited test conditions during the maintenance of the motor control center equipment.

[0005] The technical solution of the present invention is: a motor control center drawer switch test adapter, including a plug-in I connected to the motor control center cabinet body secondary plug-in, a plug-in II connected to the drawer switch secondary plug-in, and a wire connecting the plug-in I and the plug-in II.

[0006] According to a further solution, the plug-in I is a protruding plug-in, comprising a plug, a terminal I, and a fixing plate I.

[0007] According to a further solution, the plug-in II is an embedded plug-in, including a socket, a wiring terminal, and a fixing plate II.

[0008] In a further embodiment, the wire connects terminal I and terminal II.

[0009] According to a further solution, the fixing plate I and the fixing plate II are made of epoxy resin plates.

[0010] A method for testing a drawer switch of a motor control center comprises the following steps:

[0011] 1) Pull out the drawer switch from the motor control center cabinet body, connect plug-in I with the secondary plug-in of the motor control center cabinet body, and connect plug-in II with the secondary plug-in of the drawer switch to form an external secondary circuit;

[0012] 2) Confirm the correctness of the switch position signal transmission of the auxiliary contacts of analog conversion switches, contactors and other components on the ECS and DCS backend;

[0013] 3) Use the protection tester to input voltage and current into the protection device to simulate the protection action, and confirm the correctness of the protection action signal in the background machine. Use the protection tester to input the measured current into the protection device, and confirm the accuracy of the current display in the background machine.

[0014] The advantages of the present invention are: the drawer switch and the external secondary circuit are connected by the present invention, and the analog quantity and the switch quantity are actually tested for transmission with increased quantity, so as to avoid the drawbacks that the analog quantity and some switch quantities can only be checked after the equipment is running due to the limitation of test conditions during the maintenance of the motor control center equipment, thereby improving the test content and the health level of the low-voltage motor control circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Among them: 1. Plug-in I, 11. Plug, 12. Terminal block I, 13. Fixing plate I, 2. Plug-in II, 21. Socket, 22. Terminal block II, 23. Fixing plate II, 3. Wire. DETAILED DESCRIPTION

[0017] The present invention is described clearly and completely below in conjunction with the accompanying drawings so that those skilled in the art can fully implement the present invention without having to make any creative work.

[0018] The specific implementation mode of the present invention is: Figure 1As shown, a motor control center drawer switch test adapter includes a plug-in Ⅰ1 connected to the motor control center cabinet body secondary plug-in, a plug-in Ⅱ2 connected to the drawer switch secondary plug-in, and a wire 3 connecting the plug-in Ⅰ1 and the plug-in Ⅱ2. The plug-in Ⅰ1 is a protruding plug-in, including a plug 11, a terminal Ⅰ12, and a fixing plate Ⅰ13. The plug-in Ⅱ2 is an embedded plug-in, including a jack 21, a terminal 22, and a fixing plate Ⅱ23. The number of the plug 11 and the jack 21 is the same as that of the motor control center cabinet body secondary plug-in and the drawer switch secondary plug-in. The fixing plate Ⅰ13 and the fixing plate Ⅱ23 are connected to the motor control center cabinet body secondary plug-in. Fixed board II 23 is made of 1 cm thick epoxy resin board, and the conductor 3 is a multi-strand soft copper wire. Each strand of copper wire is connected to terminal I 12 and terminal II 22 according to the correct wiring to form a test circuit. When the power switch drawer of the motor control center is repaired, the switch signal is actually simulated for transmission, and the analog signal can be tested with increased quantity. The correctness of the analog quantity is confirmed in the relevant background, which solves the problem that the test items are incomplete due to limited test conditions during the maintenance of the motor control center equipment, and the analog quantity and some switch quantities can only be checked after the equipment is running, thereby improving the health level of the low-voltage motor control circuit.

[0019] A method for testing a drawer switch of a motor control center comprises the following steps:

[0020] 1) Pull out the drawer switch from the motor control center cabinet body, connect plug-in Ⅰ1 with the secondary plug-in of the motor control center cabinet body, and connect plug-in Ⅱ2 with the secondary plug-in of the drawer switch to form an external secondary circuit;

[0021] 2) Confirm the correctness of the switch position signal transmission of the auxiliary contacts of analog conversion switches, contactors and other components on the ECS and DCS backend;

[0022] 3) Use the protection tester to input voltage and current into the protection device to simulate the protection action, and confirm the correctness of the protection action signal in the background machine. Use the protection tester to input the measured current into the protection device, and confirm the accuracy of the current display in the background machine.

[0023] The preferred embodiments of the present invention are described above. It should be pointed out that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any simple modifications, equivalent changes and modifications made to the above embodiments by any technician familiar with the art based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention, shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A test method for a motor control center drawer switch test adapter, the test method is implemented based on the motor control center drawer switch test adapter, characterized in that: The motor control center drawer switch test adapter device includes a plug-in I connected to the secondary plug-in of the motor control center cabinet body, a plug-in II connected to the secondary plug-in of the drawer switch, and a wire connecting the plug-in I and the plug-in II; The plug-in I is a protruding plug-in, including a plug, a wiring terminal I, and a fixing plate I; The plug-in II is an embedded plug-in, including a jack, a wiring terminal, and a fixing plate II; The steps of the test method include: 1) Pull out the drawer switch from the motor control center cabinet body, connect plug-in I with the secondary plug-in of the motor control center cabinet body, and connect plug-in II with the secondary plug-in of the drawer switch to form an external secondary circuit; 2) Confirm the correctness of the switch position signal transmission of the analog conversion switch and the auxiliary contact of the contactor components on the ECS and DCS backend; 3) Use the protection tester to input voltage and current into the protection device to simulate the protection action, and confirm the correctness of the protection action signal in the background machine. Use the protection tester to input the measured current into the protection device, and confirm the accuracy of the current display in the background machine.

2. A test method for a motor control center drawer switch test adapter according to claim 1, characterized in that: The wire connects the wiring terminal I and the wiring terminal II.

3. A test method for a motor control center drawer switch test adapter according to claim 2, characterized in that: The fixing plate I and the fixing plate II are made of epoxy resin plates.

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