CN202562984U - Parallel connected low-pressure air switch testing device - Google Patents

Abstract

The utility model discloses a parallel-connected low-voltage air switch test device, which includes a power-taking device and an external air switch. The ends of the above clamp arms are provided with two terminal posts, one end of the four wires is respectively connected to the above terminal posts, and the other ends of the wires drawn from the terminal posts on the same side are respectively connected to the wiring holes on the same side of the external air switch. One of the clamp arms is provided with a through hole and a fastening bolt is installed, and the fastening bolt can extend into the "concave" shaped body to securely fix the power-taking device on the air switch of the circuit under test. This device connects the external air switch in parallel with the air switch of the circuit under test, and then disconnects the air switch of the circuit under test, allowing the external air switch to work instead of the air switch of the circuit under test. Electrical Safety.

Description

A parallel-connected low-voltage air switch test device

technical field

The utility model relates to the technical field of electrical equipment, in particular to a safe and reliable auxiliary equipment for electrical inspection.

Background technique

At present, meter readers in the electric power sector often encounter customers reporting abnormal fluctuations in electricity consumption during the process of reading meters and calling for electricity bills. If meter readers can conduct comparison tests with live electricity in front of customers, it will help customers analyze and find out abnormal electricity consumption. the best way. On-site testing to answer customer questions, the most common method is to use a clamp ammeter to measure whether the load current of the customer’s home is consistent with the actual load used by the household and the corresponding meter’s counting power. Since the incoming and outgoing lines of the single-phase air switch in the centralized meter box are relatively thick, And for the sake of beauty, the wiring is relatively straight. If you want to use a clamp ammeter to measure the load current of the customer's home, the clamps cannot be opened and the line cannot be clamped. It is difficult to test and answer.

Utility model content

The technical problem to be solved by the utility model is to realize an auxiliary device that can safely and quickly take power from the air switch of the circuit under test under the condition of continuous power supply.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a parallel-connected low-voltage air switch test device includes a power take-off device and an external air switch, and the power take-off device is composed of a crossbeam and clamp arms on both sides. "Concave" shaped insulating body, two terminals are provided at the ends of the two clamp arms, and one end of the four wires is respectively connected to the terminals, and the horizontal distance between the two terminals is the same as the upper/lower pile of the air switch. The distance between the first two wiring screws is corresponding, and the other ends of the wires led out from the same side terminal are respectively connected to the wiring holes on the same side of the external air switch. One of the clamp arms is provided with a through hole and a fastening bolt is installed. The fastening bolts can extend into the "concave" body to firmly fix the power-taking device on the air switch of the circuit under test. At this time, the terminals are respectively in contact with the upper and lower pile heads of the air switch of the circuit under test.

The terminal is connected to the end of the lead post, the lead post is radially provided with a lead hole for fixing the wire, and the outer end of the lead post is provided with a screw hole to the lead hole and a wire fixing stud is installed. The jig arm is respectively provided with a lead hole and a mounting hole relative to the lead hole and the position where the lead fixing stud is installed.

The terminal is a copper spring terminal.

The connecting part of the terminal post and the lead post is fixed in the hollow fixing stud, and the fixing stud is threadedly matched with the mounting hole to fix the terminal post and the lead post in the clamping arm.

An insulating cap is provided outside the mounting hole.

The end of one of the clamp arms is processed with two protruding buttons, the position of which is corresponding to the two reserved holes directly below the lower pile head of the air switch, and is used to vertically lock the device Fixed on the air switch.

The two sides of the beam are provided with concave anti-slip grooves.

The utility model has the advantages that the device has a simple structure, is safe and reliable, and is convenient to use, and can take electricity for inspection without power failure. Break the circuit, let the external air switch work instead of the air switch of the circuit under test, which is convenient for clamp ammeter inspection, and can also ensure the safety of electricity during the inspection process.

Description of drawings

The following is a brief description of the content expressed in each piece of drawings in the specification sheet of the utility model and the marks in the figure:

Figures 1 and 2 are schematic diagrams of the structure of the power-taking device;

Fig. 3 is a partial sectional view of the terminal of the power-taking device shown in Figs. 1 and 2;

Fig. 4 is a block diagram of the circuit principle of the parallel-connected low-voltage air switch test device;

The marks in the above figures are: 1. beam; 2. clamp arm; 3. terminal; 4. fastening bolt; 5. wire; 6. fixing stud; 7. lead post; 8. wire fixing stud; 9. Wire hole; 10. Mounting hole; 11. Lead hole; 12. Anti-skid groove; 13. Power-taking device; 14. External air switch; 15. Electric energy meter; 16. Air switch of the circuit under test; 17. Load.

Detailed ways

Most of the power supply lines connected to the user's home are connected to the corresponding load 17 after passing through the electric energy meter 15 and the air switch. It can be seen from FIG. 4 that the parallel-connected low-voltage air switch test device mainly includes a power-taking device 13 and an external air switch 14, and the external air switch 14 is connected in parallel with the air switch 16 of the circuit under test through the power-taking device 13.

Referring to Figures 1-3, it can be seen that the power-taking device 13 is composed of a beam 1 and clamp arms 2 on both sides to form a "concave" insulating body, and the beam 1 and clamp arm 2 can be integral structural parts formed by hard insulating plastic The width of the beam 1 is the same as the width of the air switch 16 of the circuit under test. After the two clamp arms 2 clamp the air switch, the movable switch of the air switch is located in the concave part of the "concave" structure of the power-taking device 13, so that it is fixed After being above the air switch 16 of the circuit under test, it does not affect the opening and closing of the air switch. The two sides of the crossbeam 1 are provided with concave anti-slip grooves 12, which is convenient to use the power-taking device 13 without slipping. One of the clamp arms 2 is provided with a through hole and is installed with a fastening bolt 4. The fastening bolt 4 can extend into the "concave" shaped body along the through hole, and firmly fix the power taking device 13 to the air switch 16 of the circuit under test. On, the outer end of fastening bolt 4 is provided with Bakelite handle, anti-slip and anti-shock. The ends of the two clamp arms 2 are provided with two terminal posts 3, which respectively contact the upper and lower pile heads of the air switch 16 of the circuit under test to obtain live and neutral power supplies. The terminal posts 3 use copper spring terminal posts , with a diameter of about 5 mm, can be freely expanded and contracted within a certain range, so that it can be in reliable and close contact with the upper and lower pile heads of the open space. Each of the four wires 5 has a diameter of about 4 millimeters, and one end thereof is connected with four binding posts 3 respectively, so as to realize the function of taking electricity and checking from the air switch 16 of the circuit under test.

The end of the terminal 3 in the clamp arm is connected to one end of the lead post 7, the lead post 7 is radially provided with a lead hole 11 for fixing the wire 5, the outer end of the lead post 7 is provided with a screw hole to the lead hole 11 and is installed with Lead fixing stud 8, after lead wire 5 ends are inserted into lead hole 11, lead wire 5 can be clamped by tightening lead fixing stud 8, clamping arm 2 is respectively provided with lead hole 11 and the position that lead fixing stud 8 is installed. Wire holes 9 and mounting holes 10 are arranged to facilitate wiring of the wires 5, and insulating caps can also be installed outside the mounting holes 10 to avoid the danger of leakage.

In order to facilitate the installation of the copper spring terminal, the connecting part of the terminal 3 and the lead post 7 is fixed in the hollow fixed stud 6, and the fixed stud 6 is threadedly matched with the mounting hole 10, so that the fixed stud 6 and the mounting hole 10 can be passed through. Fix the terminal 3 and the lead post 7 in the clamp arm 2. When installing, screw the fixing stud 6 into the clamp arm 2 from the installation hole 10, and connect the terminal 3 through the channel reserved at the end of the clamp arm 2. hole protrudes.

In order to fix more firmly, two protruding buttons are processed at the end of one of the clamp arms 2. The position of the buttons corresponds to the two reserved holes directly below the lower pile head of the air switch, so as to cooperate with the fastening Bolt 4 fixes the power taking device more firmly on the air switch.

Referring to Fig. 4, it can be seen that the other ends of the wires 5 drawn out from the same-side terminal 3 are respectively connected to the wiring holes on the same side of the external air switch 14. , the external air switch 14 is connected in parallel with the air switch 16 of the circuit under test, and the external air switch 14 can be a DZ47-63 C63 bipolar air switch.

During specific use, pinch the anti-slip grooves 12 on the left and right sides of the power-taking device 13 to pick it up, align the snap button with the two reserved holes directly below the lower pile head of the air switch, and stick the left and right sides of the device to the left and right sides of the air switch. On the same plane, then forcefully buckle the power-taking device 13 on the air switch 16 of the circuit under test toward the lower part of the device, so that the two copper spring terminals 3 are forced inwardly to shrink and compress the four live switches on the upper and lower pile heads. screw, and at the same time make the two protruding buttons at the end of the device fit into the two reserved holes directly below the lower pile head of the spacer, and then tighten the bolts of the Bakelite handle to make it firmly squeeze the spacer. When the power-taking device 13 and the air switch 16 of the circuit under test have been reliably connected and locked together, one end of the four wires 5 is respectively introduced from the wire hole 9 of the power-taking device 13 and fixed in the lead hole 11. One end is fixed to the corresponding wiring hole on the same side of the external air switch 14, so that the air switch 16 of the circuit under test and the external air switch 14 are in a parallel state, and then the clamp meter is clamped to any test wire 5, and all preparations are done. Finally, close the external air switch 14, and then disconnect the air switch 16 of the circuit under test, so that all the load current is transferred to the external air switch 14 circuit, and the current reading of the clamp meter is the current load current of the customer's home. Whether the current reading of the meter is roughly consistent with the converted current of the electrical appliances opened by the customer. For the smart energy meter, you can also switch the display to the zero line current item by pressing the button, and observe whether it is consistent with the reading of the clamp ammeter to complete the inspection work. After the inspection work is finished, first close the air switch 16 of the circuit under test, then disconnect the external air switch 14, remove the power-taking device 13, and then quickly restore to the original state.

The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned manner, as long as various insubstantial improvements are carried out by adopting the method concept and technical solutions of the present invention, or without Improvements that directly apply the concept and technical solutions of the present invention to other occasions are within the protection scope of the present utility model.

Claims (7)

1. A parallel-connected low-voltage air switch test device, characterized in that: it comprises a power-taking device (13) and an external air switch (14), and the power-taking device is composed of crossbeam (1) and clamp arms on both sides thereof (2) Constitute a "concave" shape insulating body, two clamping arms (2) ends are provided with two terminal posts (3), and one end of four wires (5) is respectively connected with the described terminal posts (3). ) connection, the horizontal distance between the two terminal posts (3) corresponds to the distance between the two wiring screws on the upper/lower pile heads of the air switch, and the other ends of the wires (5) drawn out from the terminal posts (3) on the same side are respectively connected to the external air switch (14) At the wiring hole on the same side, one of the clamp arms (2) is provided with a through hole and a fastening bolt (4) is installed, and the fastening bolt (4) can be "concave" Extending inside the main body, the power-taking device is firmly fixed on the air switch (16) of the circuit under test, and at this time, the terminal posts (3) are respectively in contact with the upper and lower pile heads of the air switch (16) of the circuit under test. 2. The parallel-connected low-voltage air switch test device according to claim 1, characterized in that: the terminal (3) is connected to the end of the lead post (7), and the upper diameter of the lead post (7) is To be provided with the lead hole (11) that is used for fixing lead (5), lead post (7) outer end is provided with lead hole (11) to be provided with threaded hole and lead fixing stud (8) is installed, described clip arm ( 2) A wire hole (9) and an installation hole (10) are respectively provided with respect to the lead wire hole (11) and the position where the wire fixing stud (8) is installed. 3. The parallel-connected low-voltage air switch testing device according to claim 1 or 2, characterized in that: the terminal is a copper spring terminal. 4. The parallel-connected low-voltage air switch test device according to claim 3, characterized in that: the connecting part of the terminal post (3) and the lead post (7) is fixed in a hollow fixed stud (6), The fixing stud (6) is threadedly matched with the mounting hole (10) to fix the terminal (3) and the lead post (7) in the clamp arm (2). 5. The parallel-connected low-voltage air switch testing device according to claim 4, characterized in that: said mounting hole (10) is provided with an insulating cap. 6. The parallel-connected low-pressure air switch test device according to any one of claims 1, 2, 4, 5, characterized in that: one of the ends of the clamp arm (2) is processed with two convex The position of the button corresponds to the two reserved holes directly below the lower pile head of the air switch, and is used to fix the device on the air switch in the vertical direction. 7. The parallel-connected low-pressure air switch testing device according to claim 6, characterized in that: concave anti-slip grooves (12) are provided on both sides of the beam (1).

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