Three-phase multi-tap secondary AC loop rapid plug-in display type quality detection module
By combining standardized magnetic connectors with a quality inspection module, rapid plug-and-play testing of three-phase multi-tap secondary AC circuits is achieved, solving the problems of cumbersome testing processes and errors in existing technologies, and improving testing efficiency and accuracy.
Patent Information
- Application Number
- CN202511368463.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-24
- Publication Date
- 2026-01-16
AI Technical Summary
In the existing technology, the testing process of three-phase multi-tap secondary AC circuits is cumbersome, time-consuming, labor-intensive, and prone to errors. Especially in the AC circuit testing test during the relay protection acceptance stage, it is necessary to manually select each line for measurement, resulting in low testing efficiency.
The design combines a standardized magnetic connector with the quality detection module body, achieving quick plug-and-play connection through an integrated structure. The quality detection module body automatically identifies the accuracy of wiring and uses logic calculations to determine insulation, open wires, and phase sequence errors. The internal circuit design of the module body enables automatic detection and display of results.
It enables rapid and accurate testing of three-phase multi-tap secondary AC circuits, reduces manual operation time, improves testing efficiency, and ensures the accuracy and consistency of test results.
Smart Images
Figure CN121348178A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of power electronics technology and relates to substation equipment, specifically to a three-phase multi-tap secondary AC circuit quick-connect quality detection module. Background Technology
[0002] Current transformers and voltage transformers are common equipment in substations. The secondary side wiring of these devices is characterized by a large number of components, complex wiring, wide impact, and numerous testing processes. A typical three-phase multi-tap secondary AC circuit of a current transformer consists of four rolls, each roll involving 10 cable cores. Therefore, a single current transformer typically requires testing up to 40 cable cores.
[0003] The AC circuit testing during the relay protection acceptance phase is a tedious process. This is because it requires repeatedly switching each phase line, manually selecting AB, BC, AC, AN, BN, CN, and choosing different measuring tapes, which is time-consuming and labor-intensive. AC circuits have numerous wiring connections, including protection, backup, fault recording, measurement and control, and electricity meters, making phase-by-phase measurement cumbersome. Furthermore, the large number of lines, groups, and taps makes phase-by-phase measurement prone to errors.
[0004] Therefore, it is necessary to develop an insert-type display device for rapid insertion and display quality testing of three-phase multi-tap secondary AC circuits for secondary professional acceptance. Summary of the Invention
[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a three-phase multi-tap secondary AC circuit quick-connect quality detection module.
[0006] The technical problem solved by this invention is achieved through the following technical solution: A three-phase multi-tap secondary AC circuit quick-connect quality testing module includes a standardized magnetic connector and a quality testing module body. The standardized magnetic connector and the wiring harness adopt an integrated structural design. The connector on one side of the wiring harness is connected to the wiring terminals of the standardized magnetic connector in sequence. The standardized magnetic connector can be connected to the testing module and the testing instrument. The quality detection module is used to automatically identify the accuracy of the wiring, automatically verify that A1, A2, and A3 are connected to each other, B1, B2, and B3 are connected to each other, and C1, C2, and C3 are connected to each other. If these conditions are not met, there is a broken wire. It also automatically verifies that A1, B1, and C1 are not connected to each other. If this condition is not met, there is a phase sequence error. Furthermore, it verifies that A1, B1, and C1 are not connected to E. If this condition is not met, there is poor insulation.
[0007] Furthermore, the internal circuit of the quality detection module completes the detection of phases A, B, and C. Phase A detection contacts the relays A1, A2, and A3 connected in series, respectively; phase B detection contacts the relays B1, B2, and B3 connected in series, respectively; and phase C detection contacts the relays C1, C2, and C3 connected in series, respectively. The terminals of the detection of phases A, B, and C are connected to contact E. If the relay is energized, the logic calculation is 1; otherwise, it is 0. The relay name is the name of the corresponding contact number; for example, the relay name driven by contact A1 is A1. The logical calculation formula for insulation failure is: Result1 = (A1 AND E) OR (B1 AND E) OR (C1 AND E) OR (A1 AND B1) OR (B1 AND C1) OR (C1 AND A1) When any of the logic values of A1, B1, and C1 is 1, and logic value of E is 1, it indicates that there is a path to E in the three phases, and the insulation to ground is considered unqualified. When any of the logic values of A1, B1, and C1 is 1, and the logic value of other phases is 1, it indicates that there is a connection between two phases of the three phases, and the phase-to-phase insulation is considered to be unqualified. In the above case, Result1=1, indicating that the insulation is unqualified; The logical calculation formula for the disconnection is: Result2 = (A1 XOR A2 XOR A3) OR (B1 XOR B2 XOR B3) OR (C1 XOR C2 XOR C3) When A1, A2, and A3 are XORed, it is considered that there is a break in phase A; When B1, B2, and B3 are XORed, it is considered that there is a break in phase B; When C1, C2, and C3 are XORed, it is considered that there is a break in phase C; In the above case, Result2=1, indicating a broken connection. The logical formula for calculating phase sequence errors is: Result3 = Result1 AND Result2 In the above case, Result3=1, indicating a phase sequence error. The logical calculation formula for passing the test is: Result4 = (NOT Result1) AND (NOT Result2) AND (NOT Result3).
[0008] Furthermore, the standardized magnetic connector has a notch marking the orientation, which allows for accurate magnetic attraction of the quality inspection module body.
[0009] Furthermore, the back of the quality inspection module body has 10 spring contact points to ensure reliable contact when the quick-connect quality inspection module is magnetically attracted to the standardized magnetic connector. The quality inspection module has a three-position rotary knob on the front. By manually rotating it, the A, B, and C phases are tested. After the test, the module automatically determines whether there are any defects such as insulation failure, incorrect phase sequence, or broken wires, or whether the test has passed.
[0010] The positive effects that this invention can produce are: This invention utilizes a standardized magnetic connector for quick magnetic connection between the quality inspection module and the terminal block. The standardized magnetic connector leads the three-phase multi-tap secondary AC circuit from the terminal block to an area convenient for workers. Due to the use of the standardized magnetic connector, the quality inspection module can be easily magnetically attached. The quality inspection module displays the test results intuitively, allowing for manual judgment of the correctness of the wiring of the three-phase multi-tap secondary AC circuit. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the standardized magnetic connector of the present invention; Figure 2 This is a perspective view of the main body of the quality inspection module of the present invention; Figure 3 This is a schematic diagram of the main body of the quality inspection module of the present invention; Figure 4 This is a circuit diagram of the quality inspection module body of the present invention. Detailed Implementation
[0012] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.
[0013] like Figures 1-3 As shown, a three-phase multi-tap secondary AC circuit quick-connect quality testing module is innovative in that it includes a standardized magnetic connector and a quality testing module body. The standardized magnetic connector and the wiring harness adopt an integrated structural design. The connector on one side of the wiring harness is connected to the wiring terminals of the standardized magnetic connector in sequence. The standardized magnetic connector can be connected to the testing module and the testing instrument. The quality detection module is used to automatically identify the accuracy of the wiring, automatically verify that A1, A2, and A3 are connected to each other, B1, B2, and B3 are connected to each other, and C1, C2, and C3 are connected to each other. If these conditions are not met, there is a broken wire. It also automatically verifies that A1, B1, and C1 are not connected to each other. If this condition is not met, there is a phase sequence error. Furthermore, it verifies that A1, B1, and C1 are not connected to E. If this condition is not met, there is poor insulation.
[0014] The standardized magnetic connector has a notch marking the orientation, which allows for accurate magnetic attraction of the quality inspection module body.
[0015] The back of the quality inspection module body has 10 spring contact points to ensure reliable contact when the quick-connect quality inspection module is magnetically attracted to the standardized magnetic connector. The quality inspection module has a three-position rotary knob on the front. By manually rotating it, the A, B, and C phases are tested. After the test, the module automatically determines whether there are any defects such as insulation failure, incorrect phase sequence, or broken wires, or whether the test has passed.
[0016] like Figure 4 As shown, the internal circuit of the quality detection module completes the detection of phases A, B, and C. Phase A detection contacts the relays A1, A2, and A3 connected in series, respectively; phase B detection contacts the relays B1, B2, and B3 connected in series, respectively; and phase C detection contacts the relays C1, C2, and C3 connected in series, respectively. The terminals of the detection of phases A, B, and C are connected to contact E. If the relay is energized, the logic calculation is 1; otherwise, it is 0. The relay name is the name of the corresponding contact number; for example, the relay name driven by contact A1 is A1. The logical calculation formula for insulation failure is: Result1 = (A1 AND E) OR (B1 AND E) OR (C1 AND E) OR (A1 AND B1) OR (B1 AND C1) OR (C1 AND A1) When any of the logic values of A1, B1, and C1 is 1, and logic value of E is 1, it indicates that there is a path to E in the three phases, and the insulation to ground is considered unqualified. When any of the logic values of A1, B1, and C1 is 1, and the logic value of other phases is 1, it indicates that there is a connection between two phases of the three phases, and the phase-to-phase insulation is considered to be unqualified. In the above case, Result1=1, indicating that the insulation is unqualified; The logical calculation formula for the disconnection is: Result2 = (A1 XOR A2 XOR A3) OR (B1 XOR B2 XOR B3) OR (C1 XOR C2 XOR C3) When A1, A2, and A3 are XORed, it is considered that there is a break in phase A; When B1, B2, and B3 are XORed, it is considered that there is a break in phase B; When C1, C2, and C3 are XORed, it is considered that there is a break in phase C; In the above case, Result2=1, indicating a broken connection. The logical formula for calculating phase sequence errors is: Result3 = Result1 AND Result2 In the above case, Result3=1, indicating a phase sequence error. The logical calculation formula for passing the test is: Result4 = (NOT Result1) AND (NOT Result2) AND (NOT Result3).
[0017] This invention utilizes a standardized magnetic connector for quick magnetic connection between the quality inspection module and the terminal block. The standardized magnetic connector leads the three-phase multi-tap secondary AC circuit from the terminal block to an area convenient for workers. Due to the use of the standardized magnetic connector, the quality inspection module can be easily magnetically attached. The quality inspection module displays the test results intuitively, allowing for manual judgment of the correctness of the wiring of the three-phase multi-tap secondary AC circuit.
[0018] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.
Claims
1. A three-phase multi-tap secondary AC circuit fast plug-in quality detection module, characterized in that: It includes a standardized magnetic connector and a quality inspection module body. The standardized magnetic connector and the wire harness adopt an integrated structural design. The connector on one side of the wire harness is connected to the wiring terminals of the standardized magnetic connector in sequence. The standardized magnetic connector can be connected to the inspection module and the testing instrument. The quality detection module is used to automatically identify the accuracy of the wiring, automatically verify that A1, A2, and A3 are connected to each other, B1, B2, and B3 are connected to each other, and C1, C2, and C3 are connected to each other. If these conditions are not met, there is a broken wire. It also automatically verifies that A1, B1, and C1 are not connected to each other. If this condition is not met, there is a phase sequence error. Furthermore, it verifies that A1, B1, and C1 are not connected to E. If this condition is not met, there is poor insulation.
2. The three phase multi-tap secondary AC circuit quick plug-in quality detection module according to claim 1, characterized in that: The internal circuit of the quality detection module completes the detection of phases A, B, and C. Phase A detection contacts the relays A1, A2, and A3 connected in series, respectively; phase B detection contacts the relays B1, B2, and B3 connected in series, respectively; and phase C detection contacts the relays C1, C2, and C3 connected in series, respectively. The terminals of the detection of phases A, B, and C are connected to contact E. If the relay is energized, the logic calculation is 1; otherwise, it is 0. The relay name is the name of the corresponding contact number; for example, the relay name driven by contact A1 is A1. The logical calculation formula for insulation failure is: Result1 = (A1 AND E) OR (B1 AND E) OR (C1 AND E) OR (A1 AND B1) OR (B1 AND C1) OR (C1 AND A1) When any of the logic values of A1, B1, and C1 is 1, and logic value of E is 1, it indicates that there is a path to E in the three phases, and the insulation to ground is considered unqualified. When any of the logic values of A1, B1, and C1 is 1, and the logic value of other phases is 1, it indicates that there is a connection between two phases of the three phases, and the phase-to-phase insulation is considered to be unqualified. In the above case, Result1=1, indicating that the insulation is unqualified; The logical calculation formula for the disconnection is: Result2 = (A1 XOR A2 XOR A3) OR (B1 XOR B2 XOR B3) OR (C1 XOR C2 XOR C3) When A1, A2, and A3 are XORed, it is considered that there is a break in phase A; When B1, B2, and B3 are XORed, it is considered that there is a break in phase B; When C1, C2, and C3 are XORed, it is considered that there is a break in phase C; In the above case, Result2=1, indicating a broken connection. The logical formula for calculating phase sequence errors is: Result3 = Result1 AND Result2 In the above case, Result3=1, indicating a phase sequence error. The logical calculation formula for passing the test is: Result4 = (NOT Result1) AND (NOT Result2) AND (NOT Result3).
3. The three phase multi-tap secondary AC circuit quick plug-in verification module of claim 1, wherein: The standardized magnetic connector has a notch marking the orientation, which allows for accurate magnetic attraction of the quality inspection module body.
4. The three phase multi-tap secondary AC circuit quick plug-in verification module of claim 1, wherein: The back of the quality detection module body is 10 spring contact points, which ensure that the quality detection module is quickly inserted and displayed and reliably contacted on the standardized magnetic joint. The front of the quality detection module body is a 3-gear rotary knob, which is manually rotated to complete ABC phase testing, respectively. After testing, the module automatically judges whether there is insulation failure, phase sequence error, disconnection, or whether the detection is passed.