Voltage transformer primary connection test device

Abstract

The utility model discloses a primary connection test device for a voltage transformer, which is characterized in that a tested transformer is placed on a test bench, a second pillar and a first pillar are sequentially arranged at the back of the test bench, a third pillar is arranged on the side surface of the test bench, and a test conversion control box is arranged at the top end of the second pillar; a first connecting rod and a second connecting rod are arranged on the first supporting column, a resistance testing arm and an error testing arm are transversely and horizontally connected respectively, a first connecting rod and a second connecting rod are longitudinally connected respectively, and a primary high-voltage wire fixing plate and a copper rod fixing plate are fixed on the second supporting column; the primary high-voltage wire is electrically connected with a primary terminal A of a tested mutual inductor; the other end of the primary high-voltage wire is pulled to the primary high-voltage wire fixing plate through the end part of the second connecting rod; the top of the third supporting column is transversely connected with a third connecting rod, the end of the third connecting rod pulls a primary high-voltage line, the end of the error test arm is electrically connected with a standard voltage transformer, and a voltage booster is electrically connected with the standard voltage transformer. According to the invention, centralized management of test instruments is facilitated, transformer test time is reduced, and test efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of mutual inductor, in particular to a primary connection test device for voltage mutual inductor. BACKGROUND

[0002] For the DC resistance, excitation characteristic and error test of the voltage mutual inductor, according to the traditional mutual inductor test mode, the terminal connection of the mutual inductor product is performed respectively, and then the DC resistance, excitation characteristic and error test are performed respectively. The test process needs to be connected and disconnected for multiple times, the product needs to be transported, therefore, the test time of each mutual inductor is long, the test efficiency is low, and the labor intensity of the tester is increased. A new type of primary connection test device for voltage mutual inductor is designed. After the terminal connection of the mutual inductor is completed, the DC resistance, excitation characteristic and error test buttons on the test software are clicked in sequence, the test device can be operated to realize the test of each test circuit in turn, the repetitive operation of the tester is reduced, and the test efficiency is improved. SUMMARY

[0003] In view of at least one defect of the prior art, the present disclosure provides a primary connection test device for voltage mutual inductor, which solves the problems of long test time and low test efficiency of the existing mutual inductor.

[0004] To achieve the above-mentioned purpose, the present disclosure adopts the following technical scheme: a primary connection test device for voltage mutual inductor, comprising a test table, a tested mutual inductor is placed on the test table, a second support and a first support are sequentially arranged at the back of the test table, a third support is arranged on the side of the test table, a test conversion control box is arranged at the top of the second support, the test conversion control box is used as the center, an electric resistance test arm and an error test arm are respectively connected to the left and right of the test conversion control box in the horizontal direction, a first connecting rod and a second connecting rod are respectively connected in the vertical direction, a primary high-voltage line fixing plate and a copper rod fixing plate are fixed on the second support, a copper rod is connected between the primary high-voltage line fixing plate and the copper rod fixing plate, one end of the primary high-voltage line is electrically connected to a primary terminal A of the tested mutual inductor, and the other end is pulled to the primary high-voltage line fixing plate through the second connecting rod end, the top of the third support is transversely connected with a third connecting rod, and the end of the third connecting rod is used for pulling the primary high-voltage line, the end of the error test arm is connected with a quick connection component, and the quick connection component is electrically connected with a standard voltage mutual inductor through a standard mutual inductor and an error test arm connecting line, and a booster is electrically connected with the standard voltage mutual inductor through a booster and a standard mutual inductor connecting line.

[0005] Preferably, the tested mutual inductor further comprises a primary terminal B, a secondary terminal a and a secondary terminal b, a grounding wire is electrically connected with the primary terminal B, a secondary external connecting wire a is electrically connected with the secondary terminal a, and a secondary external connecting wire b is electrically connected with the secondary terminal b.

[0006] Preferably, the subject current transformer is transported to the front of the test table by a control switch arranged on the test table.

[0007] Preferably, the first and second pillars have the same height as the third pillar, and the extension lines of the second and third links are perpendicular to each other.

[0008] Preferably, the copper rod rod portion penetrates the copper rod fixing plate.

[0009] Preferably, the quick connection component comprises a fixed support, a pin shaft, a contact block, a locking nut, a reset spring, and a locking screw, the circular sleeve part of the fixed support is sleeved on the end of the error test arm and the resistance test arm, and is locked and fixed by the locking screw, the pin shaft passes through the through hole of the contact block and the through hole of the fixed support, and is connected by the locking nut, one end of the reset spring is sleeved on the cylindrical protrusion of the fixed support, and the other end is sleeved in the cylindrical flat-bottomed hole of the contact block.

[0010] Preferably, the subject current transformer is at least one group.

[0011] Preferably, the error test arm and the resistance test arm can be downwardly rotated until the contact block in the quick connection component is overlapped with the copper rod to complete the test circuit connection through the test conversion control box.

[0012] Preferably, the error test arm, the resistance test arm, the second pillar, the second link, and the third link are made of insulating materials.

[0013] Compared with the prior art, the beneficial effects of the present application are as follows: the present disclosure improves the primary connection test device of the voltage transformer, reduces multiple test instruments, adopts a set of test device to complete three tests, facilitates centralized management of test instruments, most importantly, reduces the multiple connection and transfer operations of the test personnel on the current transformer, reduces the test time of the current transformer, and improves the test efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a front view of the primary connection test device of the voltage transformer.

[0015] Figure 2 It is a top view of the primary connection test device of the voltage transformer.

[0016] Figure 3 It is a side view of the primary connection test device of the voltage transformer.

[0017] Figure 4 It is a perspective view of the primary connection test device of the voltage transformer.

[0018] Figure 5The perspective view of the test device for resistance test (hiding test bench, guardrail, conveying line, computer desk, foot switch, mutual inductor performance test control cabinet, etc.).

[0019] Figure 6 The perspective view of the test device for error test (hiding test bench, guardrail, conveying line, computer desk, foot switch, mutual inductor performance test control cabinet, etc.).

[0020] Figure 7 The perspective view of the test device for excitation characteristic test (hiding test bench, guardrail, conveying line, computer desk, foot switch, mutual inductor performance test control cabinet, etc.).

[0021] Figure 8 The perspective view of the quick connection component connected to the end of the error test arm when it is overlapped with the copper rod Figure 1 .

[0022] Figure 9 The perspective view of the quick connection component connected to the end of the error test arm when it is overlapped with the copper rod Figure 2 .

[0023] Figure 10 The structure diagram of the quick connection component.

[0024] Markings in the figure: 1 - tested mutual inductor, 101 - primary terminal A, 102 - primary terminal B, 103 - secondary terminal a, 104 - secondary terminal b, 2 - test bench, 3 - conveying line, 4 - booster, 5 - standard voltage mutual inductor, 6 - error test arm, 7 - test conversion control box, 8 - resistance test arm, 9 - primary high voltage line, 10 - copper rod fixing plate, 11 - copper rod, 12 - first support column, 13 - second support column, 14 - third support column, 15 - first connecting rod, 16 - second connecting rod, 17 - third connecting rod, 18 - primary high voltage line fixing plate, 19 - guardrail, 20 - workbench, 21 - mutual inductor performance test control cabinet, 22 - quick connection component, 2201 - fixed support, 2202 - pin shaft, 2203 - contact block, 2204 - locking nut, 2205 - reset spring, 2206 - locking screw, 23 - flat head set screw, 24 - fixing nut, 25 - foot switch, 26 - grounding wire, 27 - secondary external wire a, 28 - secondary external wire b, 29 - warning light, 30 - control switch, 31 - connection line between standard mutual inductor and error test arm, 32 - connection line between booster and standard mutual inductor. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The components of the embodiments of this disclosure described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] This application proposes a voltage transformer primary connection test device, such as... Figures 1 to 9 As shown, the system includes: a tested current transformer 1, primary terminal A 101, primary terminal B 102, secondary terminal a 103, secondary terminal b 104, a test bench 2, a conveyor line 3, a step-up transformer 4, a standard voltage transformer 5, an error test arm 6, a test conversion control box 7, a resistance test arm 8, a primary high-voltage line 9, a copper rod fixing plate 10, a copper rod 11, a first support 12, a second support 13, a third support 14, a first connecting rod 15, a second connecting rod 16, a third connecting rod 17, a primary high-voltage line fixing plate 18, a guardrail 19, a workbench 20, a current transformer performance test control cabinet 21, a quick-connect component 22, a fixed support 2201, a pin 2202, a contact block 2203, a locking nut 2204, a return spring 2205, a locking screw 2206, a flat-head set screw 23, a fixing nut 24, a foot switch 25, a grounding wire 26, and a secondary external wiring a. 27. Secondary external wiring b28. Warning light 29. Control switch 30. Connection line between standard current transformer and error test arm 31. Connection line between step-up transformer and standard current transformer 32. When the tested current transformer 1 is conveyed to the front of the test bench 2 via the conveyor line 3, the tester uses the control switch 30 to transfer the tested current transformer 1 from the conveyor line 3 to the test bench 2 for wiring. The primary high voltage line 9 is connected to the primary terminal A101 of the tested current transformer 1, the grounding line 26 is connected to the primary terminal B102 of the tested current transformer 1, the secondary external wiring a27 is connected to the secondary terminal a103 of the tested current transformer 1, and the secondary external wiring b28 is connected to the secondary terminal b104 of the tested current transformer 1. After completing all terminal wiring, the tester returns to the workbench 20, opens the test software, clicks to start the power, and simultaneously steps on the foot switch 25. The equipment is then powered on and the test operation begins. When the resistance test button is clicked to perform a resistance test, the test conversion control box 7 of the test device controls the resistance test arm 8 to rotate downward around the Y-axis until the contact block 2203 in the quick connection component 22 touches the copper rod 11. At this time, the resistance test circuit is connected, and the test device performs the resistance test. The state of the test device is as follows. Figure 5 As shown ( Figure 5 (The equipment includes a concealed test bench, guardrails, conveyor lines, computer desk, foot switch, and instrument transformer performance test control cabinet, etc.). The tester uses the testing software to click the resistance test button. The test circuit feeds the measured data signal back to the testing software, which automatically reads and saves the measured value.

[0027] When the error button is clicked in the test software to perform error test, the resistance test arm 8 rotates upward around the Y axis until it stops in the horizontal direction, and the error test arm 6 rotates downward around the Y axis until the contact block 2203 in the quick connection component 22 is lapped at the copper rod 11, the error test loop is connected, the test device performs error test, and the test device state is as shown in Figure 6 Figure 6 The test bench, guardrail, conveying line, computer desk, foot switch, and transformer performance test control cabinet are hidden. The test personnel click the error test button in the test software, and the test loop feeds back the measured data signal to the test software. The software automatically reads the measurement value and saves it.

[0028] When the excitation characteristic button is clicked in the test software to perform excitation characteristic test, the resistance test arm 8 and the error test arm 6 both rotate upward around the Y axis, and they are unfolded to be in a horizontal state. At this time, the excitation characteristic test is performed, and the test device state is as shown in Figure 7 Figure 7 The test bench, guardrail, conveying line, computer desk, foot switch, and transformer performance test control cabinet are hidden.

[0029] During the test process, the warning light 29 flashes to play a warning role. After the above three tests are completed, the data is saved, and the test personnel enter the test area to perform terminal wiring of the next tested transformer 1.

[0030] One end of the primary high-voltage line 9 is connected to a clamp for connecting to the primary terminal A 101 of the tested transformer 1, and the other end is pulled to the primary high-voltage line fixing plate 18 through the end of the second connecting rod 16, and the line end is fixed on the primary high-voltage line fixing plate 18 by welding connection (as shown in Figure 6 7 ).

[0031] The primary high-voltage line fixing plate 18 and the copper rod fixing plate 10 are fixed on the second support 13 by means of flat head set screws 23 (number 2), the copper rods 11 (number 2) are fixed between the primary high-voltage line fixing plate 18 and the copper rod fixing plate 10 by means of fixing nuts 24 (number 2), and the rod part of the copper rod 11 penetrates through the copper rod fixing plate 10. This rod part is a reserved length, which is used for lapping the contact block 2203 in the quick connection component 22 with the copper rod 11, as shown in Figure 8 9 . Figure 8 The three-dimensional view of the state when the quick connection component connected to the end of the error test arm is lapped on the copper rod Figure 1 Figure 9 The three-dimensional view of the state when the quick connection component connected to the end of the error test arm is lapped on the copper rod Figure 2 ).

[0032] ​​​​​The standard transformer is connected with one end of the error test arm connecting line 31 and the other end of the quick connection component 22 fixed at the end of the error test arm 6. The contact block 2203 is connected with the copper rod 11 by welding, and the contact block 2203 and the copper rod 11 are made of brass. The connection of the standard transformer and the error test arm connecting line 31 with the primary high-voltage line 9 is completed during the error test, as shown in Figure 4 、 6 .

[0033] The booster is connected with one end of the standard transformer connecting line 32 and the other end of the standard transformer 5. The standard transformer connecting line 31 and the booster standard transformer connecting line 32 are wrapped with insulating tape.

[0034] The error test arm 6, the resistance test arm 8, the second support 13, the second connecting rod 16 and the third connecting rod 17 are made of bakelite, which is an insulating material and ensures no conduction.

[0035] The quick connection component 22 (two sets) includes a fixed support 2201, a pin shaft 2202, a contact block 2203, a locking nut 2204, a reset spring 2205 and a locking screw 2206, as shown in Figure 10 . The circular sleeve part of the fixed support 2201 (two, left and right symmetrical parts) is sleeved on the end of the error test arm 6 and the resistance test arm 8, and is locked and fixed by the locking screw 2206. The pin shaft 2202 passes through the through hole of the contact block 2203 and the through hole of the fixed support 2201, and then the three parts are connected by the locking nut 2204. One end of the reset spring 2205 is sleeved on the cylindrical protrusion of the fixed support 2201, and the other end is sleeved in the cylindrical flat bottom hole of the contact block 2203. This installation mode plays a guiding role of the reset spring 2205. When the contact block 2203 front end arc surface contacts the copper rod 11 when the quick connection component 22 moves downward with the error test arm 6 or the resistance test arm 8, the reset spring 2205 is compressed along the direction of the cylindrical protrusion of the fixed support 2201. During the continuous compression of the spring, the contact block 2203 front end arc surface gradually contacts the copper rod from one quarter of the circular surface to the whole contact, and the test line connection is completed. The voltage transformer primary connection test device is improved, and multiple test instruments are reduced. One set of test device can complete three tests, which facilitates the centralized management of test instruments. Most importantly, the number of test personnel connecting the transformer and the transfer operation is reduced, the transformer test time is reduced, and the test efficiency is improved.

[0036] The above shows and describes the basic principles and main features of the present disclosure and the advantages of the present disclosure. Those skilled in the art should understand that the present disclosure is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present disclosure. Without departing from the spirit and scope of the present disclosure, various changes and improvements can be made to the present disclosure, and all these changes and improvements fall within the scope of the claimed present disclosure. The scope of protection of the present disclosure is defined by the appended claims and their equivalents.

Claims

1. A primary connection test device for a voltage transformer, characterized by: The utility model relates to a kind of test benches, including test bench (2), the test mutual inductor (1) of being placed on test bench (2), second support (13) and first support (12) are sequentially arranged in the rear of the test bench (2), third support (14) is arranged in the side of the test bench (2), test conversion control box (7) is arranged at the top of the second support (13), with test conversion control box (7) as center, resistance test arm (8) and error test arm (6) are respectively connected transversely left and right, first connecting rod (15) and second connecting rod (16) are respectively connected vertically, primary high-voltage line fixed plate (18) and copper pole fixed plate (10) are fixed on the second support (13), copper pole (11) is connected between the primary high-voltage line fixed plate (18) and copper pole fixed plate (10), primary high-voltage line (9) one end is electrically connected with the primary terminal A (101) of test mutual inductor (1), and the other end is pulled to primary high-voltage line fixed plate (18) by second connecting rod (16) end, the top of the third support (14) is transversely connected with third connecting rod (17), and the end of the third connecting rod (17) is used to pull primary high-voltage line (9), the end of the error test arm (6) is connected with quick connection component (22) and is electrically connected with standard voltage mutual inductor (5) by standard mutual inductor and error test arm connecting wire (31), booster (4) is electrically connected with standard voltage mutual inductor (5) by booster and standard mutual inductor connecting wire (32).

2. A primary connection test device for a voltage transformer according to claim 1, characterized in that: The test mutual inductor (1) further includes primary terminal B (102), secondary terminal a (103), secondary terminal b (104);Ground wire (26) is electrically connected with the primary terminal B (102), secondary external wire a (27) is electrically connected with the secondary terminal a (103), and secondary external wire b (28) is electrically connected with the secondary terminal b (104).

3. A primary connection test device for a voltage transformer according to claim 1, characterized in that: The test mutual inductor (1) is transmitted to the front of test bench (2) by conveying wire (3) by control switch (30) arranged on test bench (2).

4. A primary connection test device for a voltage transformer according to claim 1, characterized in that: The first support (12) and the second support (13) are same in height with the third support (14), and the extension lines of the second connecting rod (16) and the third connecting rod (17) are perpendicular to each other.

5. A primary connection testing device for a voltage transformer according to claim 1, characterized in that: The rod part of the copper pole (11) penetrates through the copper pole fixed plate (10).

6. A primary connection test device for a voltage transformer according to claim 1, characterized in that: The quick connecting component (22) comprises a fixed support (2201), a pin shaft (2202), a contact block (2203), a locking nut (2204), a reset spring (2205), and a locking screw (2206), the circular ring sleeve part of the fixed support (2201) is sleeved on the end of the error test arm (6) and the resistance test arm (8), and is locked and fixed through the locking screw (2206), the pin shaft (2202) passes through the through hole of the contact block (2203) and the through hole of the fixed support (2201), and is connected through the locking nut (2204), one end of the reset spring (2205) is sleeved on the cylindrical protrusion of the fixed support (2201), and the other end is sleeved in the cylindrical flat-bottomed hole of the contact block (2203).

7. A primary connection test device for a voltage transformer according to claim 1, characterized in that: The subject mutual inductor (1) is at least one group.

8. A primary connection test device for a voltage transformer according to claim 1, characterized in that: The error test arm (6) and the resistance test arm (8) can be downwardly rotated until the contact block (2203) in the quick connecting component (22) is overlapped with the copper rod (11) to complete the test circuit connection through the test conversion control box (7).

9. A primary connection testing device for a voltage transformer according to claim 1, characterized in that: The error test arm (6), the resistance test arm (8), the second support (13), the second connecting rod (16), and the third connecting rod (17) are made of insulating materials.

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