Voltage transformer primary connection test device

Abstract

The invention 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 transformers, and in particular to a primary connection test device for a voltage transformer. Background Art

[0002] For the DC resistance, excitation characteristics and error tests of voltage transformers, the traditional transformer test method is to connect the terminals of the transformer products separately, and then conduct DC resistance, excitation characteristics and error tests respectively. The test process requires multiple wiring and disconnection, and the product needs to be transported. Therefore, the average test time of each transformer is long, the test efficiency is low, and the labor intensity of the tester is increased. A new voltage transformer one-time connection test device is designed. For the three tests, after completing the wiring of the transformer terminals, click the corresponding DC resistance, excitation characteristics and error test buttons on the test software in turn, and the test device can be operated to connect each test circuit to realize the test, reducing the repetitive operations of the tester and improving the test efficiency. Summary of the invention

[0003] In order to improve at least one defect of the prior art, the present invention provides a voltage transformer primary connection test device, which solves the problems of long test time and low test efficiency of the prior transformer.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a primary connection test device for a voltage transformer, comprising a test bench, a transformer to be tested is placed on the test bench, a second pillar and a first pillar are sequentially arranged behind the test bench, a third pillar is arranged on the side of the test bench, a test conversion control box is arranged on the top of the second pillar, a resistance test arm and an error test arm are respectively connected horizontally to the left and right sides with the test conversion control box as the center, a first connecting rod and a second connecting rod are respectively connected longitudinally, a primary high-voltage line fixing plate and a copper rod fixing plate are fixed on the second pillar, the 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 the primary terminal A of the transformer to be tested, and the other end is pulled to the primary high-voltage line fixing plate through the end of the second connecting rod, the top of the third pillar is horizontally connected to the third connecting rod, and the end of the third connecting rod is used to pull the primary high-voltage line, the end of the error test arm is connected to the quick connection component and then electrically connected to the standard voltage transformer through the standard transformer and error test arm connecting line, and the booster is electrically connected to the standard voltage transformer through the booster and standard transformer connecting line.

[0005] Preferably, the tested transformer further includes a primary terminal B, a secondary terminal a, and a secondary terminal b; the ground wire is electrically connected to the primary terminal B, the secondary external wire a is electrically connected to the secondary terminal a, and the secondary external wire b is electrically connected to the secondary terminal b.

[0006] Preferably, the tested transformer is transmitted to the front of the test bench by a conveyor line through a control switch arranged on the test bench.

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

[0008] Preferably, the copper rod portion partially passes through the copper rod fixing plate.

[0009] Preferably, the quick connection component includes a fixed support, a pin shaft, a contact block, a locking nut, a reset spring, and a locking screw. The annular sleeve portion of the fixed support is sleeved on the ends 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 inserted into the cylindrical flat-bottomed countersunk hole of the contact block.

[0010] Preferably, the tested transformers are at least one group.

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

[0012] Preferably, the error test arm, the resistance test arm, the second support, the second connecting rod and the third connecting rod are made of insulating materials.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention reduces multiple test instruments by improving the primary connection test device of the voltage transformer. Three tests can be completed with one set of test equipment, which facilitates the centralized management of test instruments. Most importantly, it reduces the tester's multiple transformer wiring and transportation operations, reduces the transformer test time, and improves the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0017] Figure 4 This is a three-dimensional diagram of the primary connection test device for voltage transformer.

[0018] Figure 5A three-dimensional diagram of the test equipment for resistance testing (hidden test bench, guardrail, conveyor line, computer desk, foot switch, transformer performance test control cabinet, etc.).

[0019] Figure 6 A three-dimensional diagram of the test equipment for error testing (hidden test bench, guardrail, conveyor line, computer desk, foot switch, transformer performance test control cabinet, etc.).

[0020] Figure 7 A three-dimensional diagram of the test equipment when conducting an excitation characteristics test (hidden test bench, guardrail, conveyor line, computer desk, foot switch, transformer performance test control cabinet, etc.).

[0021] Figure 8 The three-dimensional image of the quick connection part connected to the end of the error test arm when it is overlapped on the copper rod state Figure 1 .

[0022] Fig. 9 The three-dimensional image of the quick connection part connected to the end of the error test arm when it is overlapped on the copper rod state Figure 2 .

[0023] Fig.10 This is a quick connection component structure diagram.

[0024] Markings in the figure: 1-test transformer, 101-primary terminal A, 102-primary terminal B, 103-secondary terminal a, 104-secondary terminal b, 2-test bench, 3-transmission line, 4-booster, 5-standard voltage transformer, 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 pillar, 13-second pillar, 14-third pillar, 15-first connecting rod, 16-second connecting rod, 17-third connecting rod, 18-primary high-voltage line fixing plate, 19- Guardrail, 20-workbench, 21-transformer performance test control cabinet, 22-quick connection parts, 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 connection a, 28-secondary external connection b, 29-warning light, 30-control switch, 31-standard transformer and error test arm connection line, 32-boosting device and standard transformer connection line. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. The components of the embodiments of the present disclosure described and shown in the drawings here can 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, it includes a tested transformer 1, a primary terminal A 101, a primary terminal B 102, a secondary terminal a 103, a secondary terminal b 104, a test bench 2, a transmission line 3, a booster 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 transformer performance test control cabinet 21, a quick connection component 22, a fixed support 2201, a pin 2202, a contact block 2203, a locking nut 2204, a reset 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 connection b28, warning light 29, control switch 30, standard transformer and error test arm connection line 31, booster and standard transformer connection line 32. When the tested transformer 1 is conveyed from the conveyor line 3 to the front of the test bench 2, the tester controls the switch 30 to convey the tested 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 transformer 1, the grounding line 26 is connected to the primary terminal B102 of the tested transformer 1, the secondary external line a27 is connected to the secondary terminal a103 of the tested transformer 1, and the secondary external line b28 is connected to the secondary terminal b104 of the tested transformer 1. After completing all terminal wiring, the tester returns to the workbench 20 to open the test software, clicks to start the power supply, and steps on the foot switch 25 at the same time. The equipment starts to power on and starts the test operation. When the resistance test button is clicked to perform the 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 is overlapped with the copper rod 11. At this time, the resistance test circuit is connected, and the test device performs a resistance test. The state of the test device is as follows: Figure 5 As shown ( Figure 5 Hidden test bench, guardrail, conveyor line, computer desk, foot switch, transformer performance test control cabinet, etc.). The tester uses the test software to click the resistance test button, and the test circuit feeds the measured data signal back to the test software, and the software automatically reads the measured value and saves it.

[0027] When the error button is clicked in the test software to perform an 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 overlaps the copper rod 11, the error test circuit is connected, and the test device performs an error test. The state of the test device is as follows: Figure 6 As shown ( Figure 6 Hidden test bench, guardrail, conveyor line, computer desk, foot switch, transformer performance test control cabinet, etc.). The tester uses the test software to click the error test button, and the test loop feeds the measured data signal back to the test software, and the software automatically reads the measured value and saves it.

[0028] When the excitation characteristic button is clicked in the test software to conduct the excitation characteristic test, the resistance test arm 8 and the error test arm 6 both rotate upward around the Y axis, and both unfold to a horizontal state. At this time, the excitation characteristic test is conducted. The state of the test device is as follows: Figure 7 As shown ( Figure 7 Hidden test bench, guardrail, conveyor line, computer desk, foot switch, transformer performance test control cabinet, etc.).

[0029] During the test, the warning light 29 flashes to serve as a warning. After completing the above three tests, the data is saved and the tester enters the test area to connect the terminals of the next tested transformer 1.

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

[0031] The primary high-voltage line fixing plate 18 and the copper rod fixing plate 10 are fixed to the second support 13 by flat head set screws 23 (2 pieces), and the copper rod 11 (2 pieces) are fixed between the primary high-voltage line fixing plate 18 and the copper rod fixing plate 10 by fixing nuts 24 (2 pieces). The rod portion of the copper rod 11 penetrates the copper rod fixing plate 10, and the rod portion is a reserved length for overlapping the contact block 2203 in the quick connection component 22 and the copper rod 11, as shown in FIG. Figure 8 , 9 As shown ( Figure 8 The three-dimensional image of the quick connection part connected to the end of the error test arm when it is overlapped on the copper rod state Figure 1 , Fig. 9 The three-dimensional image of the quick connection part connected to the end of the error test arm when it is overlapped on the copper rod state Figure 2 ).

[0032] One end of the standard transformer and error test arm connecting line 31 is connected to the standard voltage transformer 5, and the other end is connected to the contact block 2203 in the quick connection component 22 fixed at the end of the error test arm 6 by welding, wherein the contact block 2203 and the copper rod 11 are made of brass, and are used to complete the connection between the standard transformer and error test arm connecting line 31 and the primary high-voltage line 9 when performing an error test, such as Figure 4 , 6 shown.

[0033] One end of the booster and standard transformer connecting wire 32 is connected to the booster 4 terminal interface, and the other end is connected to the standard voltage transformer 5, which is used to connect the test route during the error test, wherein the standard transformer and error test arm connecting wire 31 and the booster and standard transformer connecting wire 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 to ensure non-conductivity.

[0035] The quick connection component 22 (quantity 2 sets) includes a fixed support 2201, a pin 2202, a contact block 2203, a locking nut 2204, a return spring 2205, and a locking screw 2206. Fig.10 shown. The annular sleeve portion of the fixed support 2201 (two in number, symmetrical parts on the left and right) is sleeved on the ends of the error test arm 6 and the resistance test arm 8, and is locked and fixed by means of a locking screw 2206. After the pin 2202 passes through the through hole of the contact block 2203 and the through hole of the fixed support 2201, the locking nut 2204 is used to connect the three parts. One end of the reset spring 2205 is sleeved on the cylindrical protrusion of the fixed support 2201, and the other end is inserted into the cylindrical flat-bottomed countersunk hole of the contact block 2203. This installation method guides the reset spring 2205. When the quick connection component 22 moves downward with the error test arm 6 or the resistance test arm 8, when the front end arc surface of the contact block 2203 contacts the copper rod 11, 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 front end arc surface of the contact block 2203 gradually contacts the copper rod from contact to a quarter-circle surface, thereby completing the test circuit connection. The present invention reduces the number of test instruments by improving the primary connection test device of the voltage transformer. Three tests can be completed with one set of test equipment, which facilitates the centralized management of the test instruments. Most importantly, it reduces the testers' multiple wiring and transportation operations of the transformer, reduces the transformer test time, and improves the test efficiency.

[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 by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present disclosure. Without departing from the spirit and scope of the present disclosure, the present disclosure may have various changes and improvements, which fall within the scope of the present disclosure to be protected. The scope of protection claimed by the present disclosure is defined by the attached claims and their equivalents.

Claims

1. A voltage transformer primary connection test device, characterized in that: The invention comprises a test bench (2), on which a transformer under test (1) is placed, a second support (13) and a first support (12) are sequentially arranged behind the test bench (2), a third support (14) is arranged on the side of the test bench (2), a test conversion control box (7) is arranged at the top of the second support (13), a resistance test arm (8) and an error test arm (6) are connected horizontally to the left and right sides with the test conversion control box (7) as the center, and a first connecting rod (15) and a second connecting rod (16) are connected longitudinally, a primary high-voltage line fixing plate (18) and a copper rod fixing plate (10) are fixed on the second support (13), a copper rod (11) is connected between the primary high-voltage line fixing plate (18) and the copper rod fixing plate (10), and one end of the primary high-voltage line (9) is electrically connected to the primary terminal A of the transformer under test (1). (101), the other end is pulled to the primary high-voltage line fixing plate (18) through the end of the second connecting rod (16), the top of the third pillar (14) is laterally connected to the third connecting rod (17), the end of the third connecting rod (17) is used to pull the primary high-voltage line (9), the end of the error test arm (6) is connected to the quick connection component (22) and then electrically connected to the standard voltage transformer (5) through the standard transformer and error test arm connecting line (31), and the booster (4) is electrically connected to the standard voltage transformer (5) through the booster and standard transformer connecting line (32).

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

3. A voltage transformer primary connection test device according to claim 1, characterized in that: The tested transformer (1) is transmitted to the front of the test bench (2) via a transmission line (3) through a control switch (30) arranged on the test bench (2).

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

5. A voltage transformer primary connection test device according to claim 1, characterized in that: The rod portion of the copper rod (11) passes through the copper rod fixing plate (10).

6. A voltage transformer primary connection test device according to claim 1, characterized in that: The quick connection 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 annular sleeve portion of the fixed support (2201) is sleeved on the ends 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 is 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 inserted into the cylindrical flat-bottomed countersunk hole of the contact block (2203).

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

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

9. A voltage transformer primary connection test device 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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