Power load testing device

Abstract

Provided is a power load testing device. In the testing process, unexpected accidents such as electric shock, high falling and short circuit between equipment may occur to the working personnel once careless. The device comprises a telescopic rod (3), a support box (2) and a split-core type current transformer (1), the top of the telescopic rod is fixed on the support box, one clamp arm of the split-core type current transformer is clamped by the support box, the other clamp arm of the split-core type current transformer is bound with a stay wire (4), and the stay wire (4) is connected with the telescopic rod (3). And the stay wire is wound on the winding wheel (5) after passing through the first guide wheel (17) and the second guide wheel (18). The power load testing device is used for power load testing.

Description

Technical Field

[0001] The utility model relates to an electric power load testing device. Background Art

[0002] In order to ensure the safe power supply of power equipment to users and avoid damage to transformers due to overload operation, which may cause power outages to users. Distribution operation and maintenance staff need to test the load current data of multiple distribution transformers during the peak load current periods in the morning, noon and evening every day in winter and summer. In the traditional load current test process, the operation test method is that the staff stands on a ladder and uses a clamp ammeter to test the current on the low-voltage side of the distribution transformer. When using, press the handle tightly to open the jaws, put the measured wire into the center of the jaws, then loosen the wrench and close the jaws tightly. Since the distribution transformer is located high on the pole and is live, the low-voltage bushing of the transformer and the distance between the phases are close. During the test process, if the staff is not careful for a moment, they may suffer unexpected accidents such as electric shock, high fall, and short circuit between equipment. Utility Model Content

[0003] The utility model aims to provide an electric load testing device.

[0004] The above purpose is achieved through the following technical solutions:

[0005] A power load testing device comprises a telescopic rod, a support box and a clamp-on current transformer. The top of the telescopic rod is fixed on the support box. The support box clamps one clamp arm of the clamp-on current transformer. A pull wire is tied to the other clamp arm of the clamp-on current transformer. The pull wire passes through a first guide wheel and a second guide wheel and is then wound around a winding wheel.

[0006] The power load testing device, the support box comprises a bottom box and an upper cover, the upper cover and the bottom box are fixed by screws, and the bottom box is provided with a movable groove and a partition plate.

[0007] The electric power load testing device, the telescopic rod includes a first sleeve, a second sleeve and a third sleeve, the second sleeve is sleeved on the first sleeve, the third sleeve is sleeved on the second sleeve, the second sleeve is threadedly connected with a first fastening bolt, and the third sleeve is threadedly connected with a second fastening bolt. Beneficial Effects

[0008] 1. The utility model is provided with a telescopic rod, and the user does not need to stand on a ladder to test the current on the low-voltage side of the distribution transformer with a clamp ammeter. The wire can be wound up by rotating the winding wheel, thereby pulling the clamp arm at the movable end to move and open the jaws.

[0009] 2. The utility model realizes the normal opening and closing of the jaws by pulling the movable end clamp arm through a pull wire, and there is no need to pull the jaws, which can prevent the test from being affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Attached Figure 1 It is the front view of the utility model;

[0011] Attached Figure 2 It is a side view of the utility model;

[0012] Attached Figure 3 Yes Figure 1 AA section view;

[0013] Attached Figure 4 Yes Figure 2 A magnified view of part B;

[0014] Attached Figure 5 It is a schematic diagram of the structure after removing the upper cover;

[0015] Attached Figure 6 Yes Figure 5 Enlarged view of part C;

[0016] In the figure: 1. clamp-type current transformer; 2. support box; 3. telescopic rod; 4. pull wire; 5. take-up wheel; 6. lead wire; 7. ammeter; 8. bottom box; 9. upper cover; 10. first bushing; 11. first fastening bolt; 12. second fastening bolt; 13. second bushing; 14. third bushing; 15. roller frame; 16. partition plate; 17. first guide wheel; 18. second guide wheel; 19. movable groove; 20. notch. DETAILED DESCRIPTION

[0017] Reference Figure 1-Figure 5 , a power load testing device, which comprises a telescopic rod 3, a support box 2 and a clamp-on current transformer 1, the top of the telescopic rod is fixed on the support box, the telescopic rod comprises a first sleeve 10, a second sleeve 13 and a third sleeve 14, the second sleeve is sleeved on the first sleeve, the third sleeve is sleeved on the second sleeve, the third sleeve is a hollow sleeve with a square outer surface and a circular inner surface, the first sleeve and the second sleeve are cylindrical hollow sleeves, the second sleeve is threadedly connected with a first fastening bolt 11, the third sleeve is threadedly connected with a second fastening bolt 12, the support box clamps one clamp arm of the clamp-on current transformer, the other clamp arm of the clamp-on current transformer is tied with a pull wire 4, the pull wire passes through a first guide wheel 17 and a second guide wheel 18 and is wound on a winding wheel 5, a roller frame 15 is fixed at the bottom of the third sleeve, a rotating shaft is fixed at the center of the winding wheel, the rotating shaft passes through the roller frame and is connected to the roller frame through a bearing;

[0018] The first guide wheel and the second guide wheel are both in the form of pulleys, and two support shafts are fixed on the bottom box, one of which is rotatably connected to the first guide wheel, and the other is rotatably connected to the second guide wheel;

[0019] The power load test device, the support box includes a bottom box 8 and an upper cover 9, the upper cover and the bottom box are fixed by screws, the bottom box has a movable groove 19 and a partition plate 16, the movable groove is a space for the clamp arm at the movable end to move;

[0020] When in use, the lead wire of the fixed end clamp arm passes through the notch 20 of the first sleeve and enters the first sleeve. The first sleeve is a hollow cylindrical tube with a through hole at the bottom. The lead wire has a reserve in the first sleeve to ensure that the lead wire has sufficient length when the telescopic rod is extended or retracted. The lead wire passes through the through hole at the bottom of the first sleeve and is connected to the ammeter 7. One end of the pull wire is tied to the circular hole of the movable end clamp arm, and then passes through the first guide wheel and the second guide wheel and passes through the support box. Then the other end is tied to the winding wheel, and then the winding wheel rotates to wind the pull wire until it is nearly taut. State, reserve enough length for the wire to be wound around the reel, so that the wire can have enough length to cooperate when the telescopic rod is extended or retracted. When testing, turn the shaft by hand to rotate the reel to reel the wire. The wire pulls the clamp arm at the movable end to rotate it to open the jaws, put the measured wire into the center of the jaws, and then rotate the reel in the opposite direction to relax the wire. After the wire is relaxed, the clamp arm at the movable end will rotate in the opposite direction under the action of the clamp-type current transformer's own return spring to close the jaws tightly, and then the power load test can be carried out.

Claims

1. An electric load testing device, characterized in that: The utility model comprises a telescopic rod, a support box and a clamp-type current transformer. The top of the telescopic rod is fixed on the support box. The support box clamps one clamp arm of the clamp-type current transformer. A pulling wire is tied to the other clamp arm of the clamp-type current transformer. The pulling wire passes through a first guide wheel and a second guide wheel and is wound on a winding wheel.

2. The power load testing device according to claim 1 is characterized in that: The support box comprises a bottom box and an upper cover, the upper cover and the bottom box are fixed by screws, and the bottom box is provided with a movable groove and a partition plate.

3. The power load testing device according to claim 2 is characterized in that: The telescopic rod comprises a first sleeve, a second sleeve and a third sleeve, the second sleeve is sleeved on the first sleeve, the third sleeve is sleeved on the second sleeve, the second sleeve is threadedly connected with a first fastening bolt, and the third sleeve is threadedly connected with a second fastening bolt.

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