Tripping test box capable of preventing misoperation

Abstract

A tripping test box capable of preventing misoperation comprises a test box body, a winding device and a connector lug, the winding device is arranged in the test box body, an inlet cable is led out of one side of the test box body, an outlet cable is led out of the other side of the test box body, the inlet cable and the outlet cable are communicated in the test box body, and the connector lug is arranged in the test box body. According to the utility model, a brand-new wiring device is adopted, so that the wiring cable can be conveniently stored, wiring misoperation can be prevented, and the test process can be simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical installation, in particular to a trip test box for preventing misoperation. Background Technique

[0002] In the daily maintenance and overhaul process of the power system, ensuring the safe and reliable operation of equipment is one of the crucial tasks. Especially for power plants, it is essential to regularly inspect and test the stability control device (i.e., the stability control device). The stability control device monitors the grid parameters and timely cuts off the faulty part in case of abnormal conditions to maintain the stability of the entire power system.

[0003] When testing the trip function of the stability control device, it is usually necessary to simulate a trip signal to verify whether it can correctly trip the specified circuit breaker. This process often involves short - circuiting the trip circuit of a specific circuit breaker. The traditional test method is usually to directly short - circuit the positive and negative trip terminals of the unit under repair with wires at the rear side of the panel cabinet of the stability control device to simulate the trip signal. Although this method is simple and direct, in actual operation, since the trip circuits of multiple units may be located in the same panel cabinet or adjacent positions, if the operator fails to accurately identify the target terminals during the short - circuiting operation, it is possible to accidentally short - circuit the trip circuit of other operating units, resulting in unexpected circuit breaker tripping, which will not only seriously affect the stability and reliability of the power grid, but also pose a threat to the safety of equipment and personnel. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a trip test box for preventing misoperation. The device adopts a new wiring device, which can not only conveniently store the wiring cables, but also prevent wiring misoperation and simplify the test process.

[0005] To solve the above - mentioned technical problems, the technical solution adopted by the utility model is:

[0006] A trip test box for preventing misoperation, including a test box body, a winding device and a wiring head. A winding device is arranged inside the test box body. An incoming - line cable is led out from one side of the test box body, and an outgoing - line cable is led out from the other side of the test box body. The incoming - line cable and the outgoing - line cable are connected and communicated inside the test box body, and the other ends of the incoming - line cable and the outgoing - line cable are provided with wiring heads.

[0007] In a preferred solution, the incoming - line cable and the outgoing - line cable are wound on the winding device, and a connecting cable is connected to the ends of the incoming - line cable and the outgoing - line cable. The connecting cable is sequentially connected to a switch and an indicator light.

[0008] In a preferred embodiment, the winding device includes a fixed frame, a winding wheel, a central shaft, and a torsion spring. The central shaft and the winding wheel are connected to the center of the fixed frame. The winding wheel can rotate freely around its own axis. A torsion spring is installed outside the central shaft. The two ends of the torsion spring are respectively connected to the fixed frame and the winding wheel. The incoming cable and the outgoing cable are wound around the outside of the winding wheel.

[0009] In a preferred embodiment, guide rails are vertically connected between the fixed frames. One end of the incoming cable and the outgoing cable penetrates through the guide rail and is connected to a connection terminal.

[0010] In a preferred embodiment, sliders are installed in the guide rails. The sliders slide along the guide rails in a limited manner. A compression spring is connected between the sliders and the inner wall of the guide rails. A dial is provided on the upper end surface of the sliders.

[0011] A trip test box for preventing misoperation has the following beneficial effects during actual use:

[0012] 1. By setting the winding device, the length of the connection cable can be freely adjusted according to the distance between the terminals to be measured. When the device is idle, the connection cable can be automatically retracted, reducing the space occupied by the device.

[0013] 2. By setting the indicator light and the on-off switch, after the connection terminal is connected, the connection end can be first checked, and after ensuring that there is no error, the short-circuit operation can be carried out, avoiding the bad consequence of directly short-circuiting the wire to other trip terminals due to misoperation and causing the wrong circuit breaker to trip. If the trip fails, the state of the indicator light can also be used to initially judge whether there is a problem with the control circuit or the trip mechanism of the circuit breaker body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following further describes the present invention in conjunction with the drawings and embodiments:

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 is a schematic diagram of the internal structure of the present invention;

[0017] Figure 3 is a side sectional view of the winding device of the present invention Figure 1 ;

[0018] Figure 4 is a side sectional view of the winding device of the present invention Figure 2 ;

[0019] In the figure: test box body 1, winding device 2, fixed frame 201, winding wheel 202, central shaft 203, torsion spring 204, guide rail 205, slider 206, compression spring 207, dial 208, indicator light 3, on-off switch 4, incoming cable 5, outgoing cable 6, connection head 7, connecting cable 8. Detailed implementation

[0020] As Figure 1 shown, a trip test box for preventing misoperation includes a test box body 1, a winding device 2 and a connection head 7. A winding device 2 is arranged inside the test box body 1. An incoming cable 5 is led out from one side of the test box body 1, and an outgoing cable 6 is led out from the other side of the test box body 1. The incoming cable 5 and the outgoing cable 6 are connected and communicated inside the test box body 1. The other ends of the incoming cable 5 and the outgoing cable 6 are provided with connection heads 7. During the use of the device, the incoming cable 5 and the outgoing cable 6 are connected to the positive and negative trip terminals through the connection heads 7, and the cable length can be adjusted arbitrarily according to the distance between the trip terminals through the winding device 2.

[0021] Preferred solution is as Figure 2 shown, the incoming cable 5 and the outgoing cable 6 are wound on the winding device 2. The ends of the incoming cable 5 and the outgoing cable 6 are connected with a connecting cable 8. The connecting cable 8 is connected and communicated with the on-off switch 4 and the indicator light 3 in sequence. During the use of the device, the connection head 7 can be connected to the trip terminal first, and the conduction of the wire is controlled through the on-off switch 4. The indicator light 3 is used to display whether it is conducted.

[0022] Preferred solution is as Figure 3 shown, the winding device 2 includes a fixed frame 201, a winding wheel 202, a central shaft 203 and a torsion spring 204. The central axis of the fixed frame 201 is connected with a central shaft 203 and a winding wheel 202. The winding wheel 202 can rotate freely around its own axis. A torsion spring 204 is arranged outside the central shaft 203. The two ends of the torsion spring 204 are respectively connected with the fixed frame 201 and the winding wheel 202. The incoming cable 5 and the outgoing cable 6 are wound on the outside of the winding wheel 202. When the incoming cable 5 and the outgoing cable 6 are pulled outwards, the winding wheel 202 will be driven to rotate, and then the torsion spring 204 will be driven to twist. When the incoming cable 5 and the outgoing cable 6 are released, the winding wheel 202 will rotate back under the drive of the torsion spring 204, and then automatically recycle the incoming cable 5 and the outgoing cable 6.

[0023] Preferred solution is as Figure 4As shown, a guide rail 205 is vertically connected between the fixed frames 201. One ends of the incoming cable 5 and the outgoing cable 6 penetrate through the guide rail 205 and are connected to the connection terminals 7. A slider 206 is installed in the guide rail 205. The slider 206 is limited to slide along the guide rail 205. A compression spring 207 is connected between the slider 206 and the inner wall of the guide rail 205. A dial plate 208 is arranged on the upper end surface of the slider 206.

[0024] Under normal circumstances, the slider 206 will clamp the incoming cable 5 or the outgoing cable 6 under the action of the compression spring 207. When it is necessary to pull the incoming cable 5 or the outgoing cable 6, only need to dial the dial plate 208 outwards to drive the slider 206 to slide outwards. At this time, the slider 206 can be separated from the cable and it is in the unlocked state. When the incoming cable 5 or the outgoing cable 6 is pulled to an appropriate length, then release the dial plate 208. At this time, the slider 206 will slide inwards again under the action of the compression spring 207 and clamp the incoming cable 5 or the outgoing cable 6 to prevent the cable from being wound into the winding wheel 202.

[0025] The working principle of the device is as follows: The incoming cable 5 and the outgoing cable 6 are respectively led out from the left and right of the test box body 1, and are respectively connected to the positive and negative trip terminals with wires. The winding device 2 in the test box body 1 can adjust the lengths of the incoming cable 5 and the outgoing cable 6 according to the distance between the trip terminals at will. The connecting cable 8 inside the test box body 1 connects the indicator light 3 and the on-off switch 4.

[0026] When the indicator light 3 does not light up after pressing the on-off switch 4, it means that there is a short circuit in the trip control loop and it is necessary to further check the control loop. If the indicator light 3 lights up after pressing the on-off switch 4, but the corresponding circuit breaker does not trip, it means that the control loop is intact and there is a problem with the trip mechanism of the circuit breaker body.

Claims

1. A tripping test box for preventing misoperation, comprising a test box body (1), a winding device (2) and a wiring head (7), characterized in that: A winding device (2) is provided inside the test box body (1); an incoming cable (5) is led out from one side of the test box body (1); an outgoing cable (6) is led out from the other side of the test box body (1); the incoming cable (5) and the outgoing cable (6) are connected inside the test box body (1); and the other ends of the incoming cable (5) and the outgoing cable (6) are provided with wiring terminals (7).

2. The trip test box for preventing misoperation according to claim 1, characterized in that: The incoming cable (5) and the outgoing cable (6) are wound on the reeling device (2), and the ends of the incoming cable (5) and the outgoing cable (6) are connected to a connecting cable (8), and the connecting cable (8) is connected to the on-off switch (4) and the indicator light (3) in sequence.

3. The trip test box for preventing misoperation according to claim 1, characterized in that: The winding device (2) comprises a fixed frame (201), a winding wheel (202), a central shaft (203) and a torsion spring (204); the central shaft (203) and the winding wheel (202) are connected at the axis of the fixed frame (201); the winding wheel (202) can rotate freely around its own axis; a torsion spring (204) is arranged on the outside of the central shaft (203); two ends of the torsion spring (204) are respectively connected to the fixed frame (201) and the winding wheel (202); and an incoming cable (5) and an outgoing cable (6) are wound on the outside of the winding wheel (202).

4. The trip test box for preventing misoperation according to claim 3, characterized in that: A guide rail (205) is vertically connected between the fixing frames (201), and one end of the incoming cable (5) and the outgoing cable (6) passes through the guide rail (205) and is connected to the wiring head (7).

5. The trip test box for preventing misoperation according to claim 4, characterized in that: A slider (206) is arranged inside the guide rail (205), and the slider (206) slides along the guide rail (205) in a limited manner. A compression spring (207) is connected between the slider (206) and the inner wall of the guide rail (205), and a shift plate (208) is arranged on the upper end surface of the slider (206).

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